alts/src/generated/main/java/io/grpc/alts/internal/Handshaker.java

// Generated by the protocol buffer compiler.  DO NOT EDIT!
// source: grpc/gcp/handshaker.proto

package io.grpc.alts.internal;

public final class Handshaker {
  private Handshaker() {}
  public static void registerAllExtensions(
      com.google.protobuf.ExtensionRegistryLite registry) {
  }

  public static void registerAllExtensions(
      com.google.protobuf.ExtensionRegistry registry) {
    registerAllExtensions(
        (com.google.protobuf.ExtensionRegistryLite) registry);
  }
  /**
   * Protobuf enum {@code grpc.gcp.HandshakeProtocol}
   */
  public enum HandshakeProtocol
      implements com.google.protobuf.ProtocolMessageEnum {
    /**
     * <pre>
     * Default value.
     * </pre>
     *
     * <code>HANDSHAKE_PROTOCOL_UNSPECIFIED = 0;</code>
     */
    HANDSHAKE_PROTOCOL_UNSPECIFIED(0),
    /**
     * <pre>
     * TLS handshake protocol.
     * </pre>
     *
     * <code>TLS = 1;</code>
     */
    TLS(1),
    /**
     * <pre>
     * Application Layer Transport Security handshake protocol.
     * </pre>
     *
     * <code>ALTS = 2;</code>
     */
    ALTS(2),
    UNRECOGNIZED(-1),
    ;

    /**
     * <pre>
     * Default value.
     * </pre>
     *
     * <code>HANDSHAKE_PROTOCOL_UNSPECIFIED = 0;</code>
     */
    public static final int HANDSHAKE_PROTOCOL_UNSPECIFIED_VALUE = 0;
    /**
     * <pre>
     * TLS handshake protocol.
     * </pre>
     *
     * <code>TLS = 1;</code>
     */
    public static final int TLS_VALUE = 1;
    /**
     * <pre>
     * Application Layer Transport Security handshake protocol.
     * </pre>
     *
     * <code>ALTS = 2;</code>
     */
    public static final int ALTS_VALUE = 2;


    public final int getNumber() {
      if (this == UNRECOGNIZED) {
        throw new java.lang.IllegalArgumentException(
            "Can't get the number of an unknown enum value.");
      }
      return value;
    }

    /**
     * @deprecated Use {@link #forNumber(int)} instead.
     */
    @java.lang.Deprecated
    public static HandshakeProtocol valueOf(int value) {
      return forNumber(value);
    }

    public static HandshakeProtocol forNumber(int value) {
      switch (value) {
        case 0: return HANDSHAKE_PROTOCOL_UNSPECIFIED;
        case 1: return TLS;
        case 2: return ALTS;
        default: return null;
      }
    }

    public static com.google.protobuf.Internal.EnumLiteMap<HandshakeProtocol>
        internalGetValueMap() {
      return internalValueMap;
    }
    private static final com.google.protobuf.Internal.EnumLiteMap<
        HandshakeProtocol> internalValueMap =
          new com.google.protobuf.Internal.EnumLiteMap<HandshakeProtocol>() {
            public HandshakeProtocol findValueByNumber(int number) {
              return HandshakeProtocol.forNumber(number);
            }
          };

    public final com.google.protobuf.Descriptors.EnumValueDescriptor
        getValueDescriptor() {
      return getDescriptor().getValues().get(ordinal());
    }
    public final com.google.protobuf.Descriptors.EnumDescriptor
        getDescriptorForType() {
      return getDescriptor();
    }
    public static final com.google.protobuf.Descriptors.EnumDescriptor
        getDescriptor() {
      return io.grpc.alts.internal.Handshaker.getDescriptor().getEnumTypes().get(0);
    }

    private static final HandshakeProtocol[] VALUES = values();

    public static HandshakeProtocol valueOf(
        com.google.protobuf.Descriptors.EnumValueDescriptor desc) {
      if (desc.getType() != getDescriptor()) {
        throw new java.lang.IllegalArgumentException(
          "EnumValueDescriptor is not for this type.");
      }
      if (desc.getIndex() == -1) {
        return UNRECOGNIZED;
      }
      return VALUES[desc.getIndex()];
    }

    private final int value;

    private HandshakeProtocol(int value) {
      this.value = value;
    }

    // @@protoc_insertion_point(enum_scope:grpc.gcp.HandshakeProtocol)
  }

  /**
   * Protobuf enum {@code grpc.gcp.NetworkProtocol}
   */
  public enum NetworkProtocol
      implements com.google.protobuf.ProtocolMessageEnum {
    /**
     * <code>NETWORK_PROTOCOL_UNSPECIFIED = 0;</code>
     */
    NETWORK_PROTOCOL_UNSPECIFIED(0),
    /**
     * <code>TCP = 1;</code>
     */
    TCP(1),
    /**
     * <code>UDP = 2;</code>
     */
    UDP(2),
    UNRECOGNIZED(-1),
    ;

    /**
     * <code>NETWORK_PROTOCOL_UNSPECIFIED = 0;</code>
     */
    public static final int NETWORK_PROTOCOL_UNSPECIFIED_VALUE = 0;
    /**
     * <code>TCP = 1;</code>
     */
    public static final int TCP_VALUE = 1;
    /**
     * <code>UDP = 2;</code>
     */
    public static final int UDP_VALUE = 2;


    public final int getNumber() {
      if (this == UNRECOGNIZED) {
        throw new java.lang.IllegalArgumentException(
            "Can't get the number of an unknown enum value.");
      }
      return value;
    }

    /**
     * @deprecated Use {@link #forNumber(int)} instead.
     */
    @java.lang.Deprecated
    public static NetworkProtocol valueOf(int value) {
      return forNumber(value);
    }

    public static NetworkProtocol forNumber(int value) {
      switch (value) {
        case 0: return NETWORK_PROTOCOL_UNSPECIFIED;
        case 1: return TCP;
        case 2: return UDP;
        default: return null;
      }
    }

    public static com.google.protobuf.Internal.EnumLiteMap<NetworkProtocol>
        internalGetValueMap() {
      return internalValueMap;
    }
    private static final com.google.protobuf.Internal.EnumLiteMap<
        NetworkProtocol> internalValueMap =
          new com.google.protobuf.Internal.EnumLiteMap<NetworkProtocol>() {
            public NetworkProtocol findValueByNumber(int number) {
              return NetworkProtocol.forNumber(number);
            }
          };

    public final com.google.protobuf.Descriptors.EnumValueDescriptor
        getValueDescriptor() {
      return getDescriptor().getValues().get(ordinal());
    }
    public final com.google.protobuf.Descriptors.EnumDescriptor
        getDescriptorForType() {
      return getDescriptor();
    }
    public static final com.google.protobuf.Descriptors.EnumDescriptor
        getDescriptor() {
      return io.grpc.alts.internal.Handshaker.getDescriptor().getEnumTypes().get(1);
    }

    private static final NetworkProtocol[] VALUES = values();

    public static NetworkProtocol valueOf(
        com.google.protobuf.Descriptors.EnumValueDescriptor desc) {
      if (desc.getType() != getDescriptor()) {
        throw new java.lang.IllegalArgumentException(
          "EnumValueDescriptor is not for this type.");
      }
      if (desc.getIndex() == -1) {
        return UNRECOGNIZED;
      }
      return VALUES[desc.getIndex()];
    }

    private final int value;

    private NetworkProtocol(int value) {
      this.value = value;
    }

    // @@protoc_insertion_point(enum_scope:grpc.gcp.NetworkProtocol)
  }

  public interface EndpointOrBuilder extends
      // @@protoc_insertion_point(interface_extends:grpc.gcp.Endpoint)
      com.google.protobuf.MessageOrBuilder {

    /**
     * <pre>
     * IP address. It should contain an IPv4 or IPv6 string literal, e.g.
     * "192.168.0.1" or "2001:db8::1".
     * </pre>
     *
     * <code>string ip_address = 1;</code>
     */
    java.lang.String getIpAddress();
    /**
     * <pre>
     * IP address. It should contain an IPv4 or IPv6 string literal, e.g.
     * "192.168.0.1" or "2001:db8::1".
     * </pre>
     *
     * <code>string ip_address = 1;</code>
     */
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    /**
     * <pre>
     * Port number.
     * </pre>
     *
     * <code>int32 port = 2;</code>
     */
    int getPort();

    /**
     * <pre>
     * Network protocol (e.g., TCP, UDP) associated with this endpoint.
     * </pre>
     *
     * <code>.grpc.gcp.NetworkProtocol protocol = 3;</code>
     */
    int getProtocolValue();
    /**
     * <pre>
     * Network protocol (e.g., TCP, UDP) associated with this endpoint.
     * </pre>
     *
     * <code>.grpc.gcp.NetworkProtocol protocol = 3;</code>
     */
    io.grpc.alts.internal.Handshaker.NetworkProtocol getProtocol();
  }
  /**
   * Protobuf type {@code grpc.gcp.Endpoint}
   */
  public  static final class Endpoint extends
      com.google.protobuf.GeneratedMessageV3 implements
      // @@protoc_insertion_point(message_implements:grpc.gcp.Endpoint)
      EndpointOrBuilder {
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    // Use Endpoint.newBuilder() to construct.
    private Endpoint(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
      super(builder);
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    private Endpoint() {
      ipAddress_ = "";
      port_ = 0;
      protocol_ = 0;
    }

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    public final com.google.protobuf.UnknownFieldSet
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    private Endpoint(
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        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
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      this();
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    public static final com.google.protobuf.Descriptors.Descriptor
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    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
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    public static final int IP_ADDRESS_FIELD_NUMBER = 1;
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    /**
     * <pre>
     * IP address. It should contain an IPv4 or IPv6 string literal, e.g.
     * "192.168.0.1" or "2001:db8::1".
     * </pre>
     *
     * <code>string ip_address = 1;</code>
     */
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     * <pre>
     * IP address. It should contain an IPv4 or IPv6 string literal, e.g.
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     * </pre>
     *
     * <code>string ip_address = 1;</code>
     */
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        ipAddress_ = b;
        return b;
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        return (com.google.protobuf.ByteString) ref;
      }
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    public static final int PORT_FIELD_NUMBER = 2;
    private int port_;
    /**
     * <pre>
     * Port number.
     * </pre>
     *
     * <code>int32 port = 2;</code>
     */
    public int getPort() {
      return port_;
    }

    public static final int PROTOCOL_FIELD_NUMBER = 3;
    private int protocol_;
    /**
     * <pre>
     * Network protocol (e.g., TCP, UDP) associated with this endpoint.
     * </pre>
     *
     * <code>.grpc.gcp.NetworkProtocol protocol = 3;</code>
     */
    public int getProtocolValue() {
      return protocol_;
    }
    /**
     * <pre>
     * Network protocol (e.g., TCP, UDP) associated with this endpoint.
     * </pre>
     *
     * <code>.grpc.gcp.NetworkProtocol protocol = 3;</code>
     */
    public io.grpc.alts.internal.Handshaker.NetworkProtocol getProtocol() {
      io.grpc.alts.internal.Handshaker.NetworkProtocol result = io.grpc.alts.internal.Handshaker.NetworkProtocol.valueOf(protocol_);
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    }

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    public final boolean isInitialized() {
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      if (isInitialized == 0) return false;

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    public void writeTo(com.google.protobuf.CodedOutputStream output)
                        throws java.io.IOException {
      if (!getIpAddressBytes().isEmpty()) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 1, ipAddress_);
      }
      if (port_ != 0) {
        output.writeInt32(2, port_);
      }
      if (protocol_ != io.grpc.alts.internal.Handshaker.NetworkProtocol.NETWORK_PROTOCOL_UNSPECIFIED.getNumber()) {
        output.writeEnum(3, protocol_);
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      unknownFields.writeTo(output);
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    public int getSerializedSize() {
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    @java.lang.Override
    public boolean equals(final java.lang.Object obj) {
      if (obj == this) {
       return true;
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      if (!(obj instanceof io.grpc.alts.internal.Handshaker.Endpoint)) {
        return super.equals(obj);
      }
      io.grpc.alts.internal.Handshaker.Endpoint other = (io.grpc.alts.internal.Handshaker.Endpoint) obj;

      boolean result = true;
      result = result && getIpAddress()
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      result = result && (getPort()
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      result = result && protocol_ == other.protocol_;
      result = result && unknownFields.equals(other.unknownFields);
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    }

    @java.lang.Override
    public int hashCode() {
      if (memoizedHashCode != 0) {
        return memoizedHashCode;
      }
      int hash = 41;
      hash = (19 * hash) + getDescriptor().hashCode();
      hash = (37 * hash) + IP_ADDRESS_FIELD_NUMBER;
      hash = (53 * hash) + getIpAddress().hashCode();
      hash = (37 * hash) + PORT_FIELD_NUMBER;
      hash = (53 * hash) + getPort();
      hash = (37 * hash) + PROTOCOL_FIELD_NUMBER;
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    public static io.grpc.alts.internal.Handshaker.Endpoint parseFrom(
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    public static io.grpc.alts.internal.Handshaker.Endpoint parseFrom(
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     * Protobuf type {@code grpc.gcp.Endpoint}
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      /**
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       * </pre>
       *
       * <code>string ip_address = 1;</code>
       */
      public java.lang.String getIpAddress() {
        java.lang.Object ref = ipAddress_;
        if (!(ref instanceof java.lang.String)) {
          com.google.protobuf.ByteString bs =
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          java.lang.String s = bs.toStringUtf8();
          ipAddress_ = s;
          return s;
        } else {
          return (java.lang.String) ref;
        }
      }
      /**
       * <pre>
       * IP address. It should contain an IPv4 or IPv6 string literal, e.g.
       * "192.168.0.1" or "2001:db8::1".
       * </pre>
       *
       * <code>string ip_address = 1;</code>
       */
      public com.google.protobuf.ByteString
          getIpAddressBytes() {
        java.lang.Object ref = ipAddress_;
        if (ref instanceof String) {
          com.google.protobuf.ByteString b = 
              com.google.protobuf.ByteString.copyFromUtf8(
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          return (com.google.protobuf.ByteString) ref;
        }
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       * <pre>
       * IP address. It should contain an IPv4 or IPv6 string literal, e.g.
       * "192.168.0.1" or "2001:db8::1".
       * </pre>
       *
       * <code>string ip_address = 1;</code>
       */
      public Builder setIpAddress(
          java.lang.String value) {
        if (value == null) {
    throw new NullPointerException();
  }
  
        ipAddress_ = value;
        onChanged();
        return this;
      }
      /**
       * <pre>
       * IP address. It should contain an IPv4 or IPv6 string literal, e.g.
       * "192.168.0.1" or "2001:db8::1".
       * </pre>
       *
       * <code>string ip_address = 1;</code>
       */
      public Builder clearIpAddress() {
        
        ipAddress_ = getDefaultInstance().getIpAddress();
        onChanged();
        return this;
      }
      /**
       * <pre>
       * IP address. It should contain an IPv4 or IPv6 string literal, e.g.
       * "192.168.0.1" or "2001:db8::1".
       * </pre>
       *
       * <code>string ip_address = 1;</code>
       */
      public Builder setIpAddressBytes(
          com.google.protobuf.ByteString value) {
        if (value == null) {
    throw new NullPointerException();
  }
  checkByteStringIsUtf8(value);
        
        ipAddress_ = value;
        onChanged();
        return this;
      }

      private int port_ ;
      /**
       * <pre>
       * Port number.
       * </pre>
       *
       * <code>int32 port = 2;</code>
       */
      public int getPort() {
        return port_;
      }
      /**
       * <pre>
       * Port number.
       * </pre>
       *
       * <code>int32 port = 2;</code>
       */
      public Builder setPort(int value) {
        
        port_ = value;
        onChanged();
        return this;
      }
      /**
       * <pre>
       * Port number.
       * </pre>
       *
       * <code>int32 port = 2;</code>
       */
      public Builder clearPort() {
        
        port_ = 0;
        onChanged();
        return this;
      }

      private int protocol_ = 0;
      /**
       * <pre>
       * Network protocol (e.g., TCP, UDP) associated with this endpoint.
       * </pre>
       *
       * <code>.grpc.gcp.NetworkProtocol protocol = 3;</code>
       */
      public int getProtocolValue() {
        return protocol_;
      }
      /**
       * <pre>
       * Network protocol (e.g., TCP, UDP) associated with this endpoint.
       * </pre>
       *
       * <code>.grpc.gcp.NetworkProtocol protocol = 3;</code>
       */
      public Builder setProtocolValue(int value) {
        protocol_ = value;
        onChanged();
        return this;
      }
      /**
       * <pre>
       * Network protocol (e.g., TCP, UDP) associated with this endpoint.
       * </pre>
       *
       * <code>.grpc.gcp.NetworkProtocol protocol = 3;</code>
       */
      public io.grpc.alts.internal.Handshaker.NetworkProtocol getProtocol() {
        io.grpc.alts.internal.Handshaker.NetworkProtocol result = io.grpc.alts.internal.Handshaker.NetworkProtocol.valueOf(protocol_);
        return result == null ? io.grpc.alts.internal.Handshaker.NetworkProtocol.UNRECOGNIZED : result;
      }
      /**
       * <pre>
       * Network protocol (e.g., TCP, UDP) associated with this endpoint.
       * </pre>
       *
       * <code>.grpc.gcp.NetworkProtocol protocol = 3;</code>
       */
      public Builder setProtocol(io.grpc.alts.internal.Handshaker.NetworkProtocol value) {
        if (value == null) {
          throw new NullPointerException();
        }
        
        protocol_ = value.getNumber();
        onChanged();
        return this;
      }
      /**
       * <pre>
       * Network protocol (e.g., TCP, UDP) associated with this endpoint.
       * </pre>
       *
       * <code>.grpc.gcp.NetworkProtocol protocol = 3;</code>
       */
      public Builder clearProtocol() {
        
        protocol_ = 0;
        onChanged();
        return this;
      }
      public final Builder setUnknownFields(
          final com.google.protobuf.UnknownFieldSet unknownFields) {
        return super.setUnknownFieldsProto3(unknownFields);
      }

      public final Builder mergeUnknownFields(
          final com.google.protobuf.UnknownFieldSet unknownFields) {
        return super.mergeUnknownFields(unknownFields);
      }


      // @@protoc_insertion_point(builder_scope:grpc.gcp.Endpoint)
    }

    // @@protoc_insertion_point(class_scope:grpc.gcp.Endpoint)
    private static final io.grpc.alts.internal.Handshaker.Endpoint DEFAULT_INSTANCE;
    static {
      DEFAULT_INSTANCE = new io.grpc.alts.internal.Handshaker.Endpoint();
    }

    public static io.grpc.alts.internal.Handshaker.Endpoint getDefaultInstance() {
      return DEFAULT_INSTANCE;
    }

    private static final com.google.protobuf.Parser<Endpoint>
        PARSER = new com.google.protobuf.AbstractParser<Endpoint>() {
      public Endpoint parsePartialFrom(
          com.google.protobuf.CodedInputStream input,
          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
          throws com.google.protobuf.InvalidProtocolBufferException {
        return new Endpoint(input, extensionRegistry);
      }
    };

    public static com.google.protobuf.Parser<Endpoint> parser() {
      return PARSER;
    }

    @java.lang.Override
    public com.google.protobuf.Parser<Endpoint> getParserForType() {
      return PARSER;
    }

    public io.grpc.alts.internal.Handshaker.Endpoint getDefaultInstanceForType() {
      return DEFAULT_INSTANCE;
    }

  }

  public interface IdentityOrBuilder extends
      // @@protoc_insertion_point(interface_extends:grpc.gcp.Identity)
      com.google.protobuf.MessageOrBuilder {

    /**
     * <pre>
     * Service account of a connection endpoint.
     * </pre>
     *
     * <code>string service_account = 1;</code>
     */
    java.lang.String getServiceAccount();
    /**
     * <pre>
     * Service account of a connection endpoint.
     * </pre>
     *
     * <code>string service_account = 1;</code>
     */
    com.google.protobuf.ByteString
        getServiceAccountBytes();

    /**
     * <pre>
     * Hostname of a connection endpoint.
     * </pre>
     *
     * <code>string hostname = 2;</code>
     */
    java.lang.String getHostname();
    /**
     * <pre>
     * Hostname of a connection endpoint.
     * </pre>
     *
     * <code>string hostname = 2;</code>
     */
    com.google.protobuf.ByteString
        getHostnameBytes();

    /**
     * <pre>
     * Additional attributes of the identity.
     * </pre>
     *
     * <code>map&lt;string, string&gt; attributes = 3;</code>
     */
    int getAttributesCount();
    /**
     * <pre>
     * Additional attributes of the identity.
     * </pre>
     *
     * <code>map&lt;string, string&gt; attributes = 3;</code>
     */
    boolean containsAttributes(
        java.lang.String key);
    /**
     * Use {@link #getAttributesMap()} instead.
     */
    @java.lang.Deprecated
    java.util.Map<java.lang.String, java.lang.String>
    getAttributes();
    /**
     * <pre>
     * Additional attributes of the identity.
     * </pre>
     *
     * <code>map&lt;string, string&gt; attributes = 3;</code>
     */
    java.util.Map<java.lang.String, java.lang.String>
    getAttributesMap();
    /**
     * <pre>
     * Additional attributes of the identity.
     * </pre>
     *
     * <code>map&lt;string, string&gt; attributes = 3;</code>
     */

    java.lang.String getAttributesOrDefault(
        java.lang.String key,
        java.lang.String defaultValue);
    /**
     * <pre>
     * Additional attributes of the identity.
     * </pre>
     *
     * <code>map&lt;string, string&gt; attributes = 3;</code>
     */

    java.lang.String getAttributesOrThrow(
        java.lang.String key);

    public io.grpc.alts.internal.Handshaker.Identity.IdentityOneofCase getIdentityOneofCase();
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  /**
   * Protobuf type {@code grpc.gcp.Identity}
   */
  public  static final class Identity extends
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      HOSTNAME(2),
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      public static IdentityOneofCase forNumber(int value) {
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          identityOneofCase_);
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    /**
     * <pre>
     * Service account of a connection endpoint.
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     *
     * <code>string service_account = 1;</code>
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     * <pre>
     * Service account of a connection endpoint.
     * </pre>
     *
     * <code>string service_account = 1;</code>
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    public static final int HOSTNAME_FIELD_NUMBER = 2;
    /**
     * <pre>
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     * </pre>
     *
     * <code>string hostname = 2;</code>
     */
    public java.lang.String getHostname() {
      java.lang.Object ref = "";
      if (identityOneofCase_ == 2) {
        ref = identityOneof_;
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      if (ref instanceof java.lang.String) {
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        com.google.protobuf.ByteString bs = 
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          identityOneof_ = s;
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        return s;
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    }
    /**
     * <pre>
     * Hostname of a connection endpoint.
     * </pre>
     *
     * <code>string hostname = 2;</code>
     */
    public com.google.protobuf.ByteString
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      java.lang.Object ref = "";
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    public int getAttributesCount() {
      return internalGetAttributes().getMap().size();
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    /**
     * <pre>
     * Additional attributes of the identity.
     * </pre>
     *
     * <code>map&lt;string, string&gt; attributes = 3;</code>
     */

    public boolean containsAttributes(
        java.lang.String key) {
      if (key == null) { throw new java.lang.NullPointerException(); }
      return internalGetAttributes().getMap().containsKey(key);
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    /**
     * Use {@link #getAttributesMap()} instead.
     */
    @java.lang.Deprecated
    public java.util.Map<java.lang.String, java.lang.String> getAttributes() {
      return getAttributesMap();
    }
    /**
     * <pre>
     * Additional attributes of the identity.
     * </pre>
     *
     * <code>map&lt;string, string&gt; attributes = 3;</code>
     */

    public java.util.Map<java.lang.String, java.lang.String> getAttributesMap() {
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    /**
     * <pre>
     * Additional attributes of the identity.
     * </pre>
     *
     * <code>map&lt;string, string&gt; attributes = 3;</code>
     */

    public java.lang.String getAttributesOrDefault(
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    /**
     * <pre>
     * Additional attributes of the identity.
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     *
     * <code>map&lt;string, string&gt; attributes = 3;</code>
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      if (obj == this) {
       return true;
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      if (!(obj instanceof io.grpc.alts.internal.Handshaker.Identity)) {
        return super.equals(obj);
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        default:
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       * <pre>
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       *
       * <code>string service_account = 1;</code>
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      /**
       * <pre>
       * Hostname of a connection endpoint.
       * </pre>
       *
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       * <pre>
       * Hostname of a connection endpoint.
       * </pre>
       *
       * <code>string hostname = 2;</code>
       */
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  identityOneofCase_ = 2;
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       * <pre>
       * Hostname of a connection endpoint.
       * </pre>
       *
       * <code>string hostname = 2;</code>
       */
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       * <pre>
       * Hostname of a connection endpoint.
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       *
       * <code>string hostname = 2;</code>
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      /**
       * <pre>
       * Additional attributes of the identity.
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       *
       * <code>map&lt;string, string&gt; attributes = 3;</code>
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       * <pre>
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       *
       * <code>map&lt;string, string&gt; attributes = 3;</code>
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       * <pre>
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       *
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       */

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       * <pre>
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       *
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       * <pre>
       * Additional attributes of the identity.
       * </pre>
       *
       * <code>map&lt;string, string&gt; attributes = 3;</code>
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       * <pre>
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       * <pre>
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      // @@protoc_insertion_point(builder_scope:grpc.gcp.Identity)
    }

    // @@protoc_insertion_point(class_scope:grpc.gcp.Identity)
    private static final io.grpc.alts.internal.Handshaker.Identity DEFAULT_INSTANCE;
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        return new Identity(input, extensionRegistry);
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      return PARSER;
    }

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    public com.google.protobuf.Parser<Identity> getParserForType() {
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    }

    public io.grpc.alts.internal.Handshaker.Identity getDefaultInstanceForType() {
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  }

  public interface StartClientHandshakeReqOrBuilder extends
      // @@protoc_insertion_point(interface_extends:grpc.gcp.StartClientHandshakeReq)
      com.google.protobuf.MessageOrBuilder {

    /**
     * <pre>
     * Handshake security protocol requested by the client.
     * </pre>
     *
     * <code>.grpc.gcp.HandshakeProtocol handshake_security_protocol = 1;</code>
     */
    int getHandshakeSecurityProtocolValue();
    /**
     * <pre>
     * Handshake security protocol requested by the client.
     * </pre>
     *
     * <code>.grpc.gcp.HandshakeProtocol handshake_security_protocol = 1;</code>
     */
    io.grpc.alts.internal.Handshaker.HandshakeProtocol getHandshakeSecurityProtocol();

    /**
     * <pre>
     * The application protocols supported by the client, e.g., "h2" (for http2),
     * "grpc".
     * </pre>
     *
     * <code>repeated string application_protocols = 2;</code>
     */
    java.util.List<java.lang.String>
        getApplicationProtocolsList();
    /**
     * <pre>
     * The application protocols supported by the client, e.g., "h2" (for http2),
     * "grpc".
     * </pre>
     *
     * <code>repeated string application_protocols = 2;</code>
     */
    int getApplicationProtocolsCount();
    /**
     * <pre>
     * The application protocols supported by the client, e.g., "h2" (for http2),
     * "grpc".
     * </pre>
     *
     * <code>repeated string application_protocols = 2;</code>
     */
    java.lang.String getApplicationProtocols(int index);
    /**
     * <pre>
     * The application protocols supported by the client, e.g., "h2" (for http2),
     * "grpc".
     * </pre>
     *
     * <code>repeated string application_protocols = 2;</code>
     */
    com.google.protobuf.ByteString
        getApplicationProtocolsBytes(int index);

    /**
     * <pre>
     * The record protocols supported by the client, e.g.,
     * "ALTSRP_GCM_AES128".
     * </pre>
     *
     * <code>repeated string record_protocols = 3;</code>
     */
    java.util.List<java.lang.String>
        getRecordProtocolsList();
    /**
     * <pre>
     * The record protocols supported by the client, e.g.,
     * "ALTSRP_GCM_AES128".
     * </pre>
     *
     * <code>repeated string record_protocols = 3;</code>
     */
    int getRecordProtocolsCount();
    /**
     * <pre>
     * The record protocols supported by the client, e.g.,
     * "ALTSRP_GCM_AES128".
     * </pre>
     *
     * <code>repeated string record_protocols = 3;</code>
     */
    java.lang.String getRecordProtocols(int index);
    /**
     * <pre>
     * The record protocols supported by the client, e.g.,
     * "ALTSRP_GCM_AES128".
     * </pre>
     *
     * <code>repeated string record_protocols = 3;</code>
     */
    com.google.protobuf.ByteString
        getRecordProtocolsBytes(int index);

    /**
     * <pre>
     * (Optional) Describes which server identities are acceptable by the client.
     * If target identities are provided and none of them matches the peer
     * identity of the server, handshake will fail.
     * </pre>
     *
     * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
     */
    java.util.List<io.grpc.alts.internal.Handshaker.Identity> 
        getTargetIdentitiesList();
    /**
     * <pre>
     * (Optional) Describes which server identities are acceptable by the client.
     * If target identities are provided and none of them matches the peer
     * identity of the server, handshake will fail.
     * </pre>
     *
     * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
     */
    io.grpc.alts.internal.Handshaker.Identity getTargetIdentities(int index);
    /**
     * <pre>
     * (Optional) Describes which server identities are acceptable by the client.
     * If target identities are provided and none of them matches the peer
     * identity of the server, handshake will fail.
     * </pre>
     *
     * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
     */
    int getTargetIdentitiesCount();
    /**
     * <pre>
     * (Optional) Describes which server identities are acceptable by the client.
     * If target identities are provided and none of them matches the peer
     * identity of the server, handshake will fail.
     * </pre>
     *
     * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
     */
    java.util.List<? extends io.grpc.alts.internal.Handshaker.IdentityOrBuilder> 
        getTargetIdentitiesOrBuilderList();
    /**
     * <pre>
     * (Optional) Describes which server identities are acceptable by the client.
     * If target identities are provided and none of them matches the peer
     * identity of the server, handshake will fail.
     * </pre>
     *
     * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
     */
    io.grpc.alts.internal.Handshaker.IdentityOrBuilder getTargetIdentitiesOrBuilder(
        int index);

    /**
     * <pre>
     * (Optional) Application may specify a local identity. Otherwise, the
     * handshaker chooses a default local identity.
     * </pre>
     *
     * <code>.grpc.gcp.Identity local_identity = 5;</code>
     */
    boolean hasLocalIdentity();
    /**
     * <pre>
     * (Optional) Application may specify a local identity. Otherwise, the
     * handshaker chooses a default local identity.
     * </pre>
     *
     * <code>.grpc.gcp.Identity local_identity = 5;</code>
     */
    io.grpc.alts.internal.Handshaker.Identity getLocalIdentity();
    /**
     * <pre>
     * (Optional) Application may specify a local identity. Otherwise, the
     * handshaker chooses a default local identity.
     * </pre>
     *
     * <code>.grpc.gcp.Identity local_identity = 5;</code>
     */
    io.grpc.alts.internal.Handshaker.IdentityOrBuilder getLocalIdentityOrBuilder();

    /**
     * <pre>
     * (Optional) Local endpoint information of the connection to the server,
     * such as local IP address, port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint local_endpoint = 6;</code>
     */
    boolean hasLocalEndpoint();
    /**
     * <pre>
     * (Optional) Local endpoint information of the connection to the server,
     * such as local IP address, port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint local_endpoint = 6;</code>
     */
    io.grpc.alts.internal.Handshaker.Endpoint getLocalEndpoint();
    /**
     * <pre>
     * (Optional) Local endpoint information of the connection to the server,
     * such as local IP address, port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint local_endpoint = 6;</code>
     */
    io.grpc.alts.internal.Handshaker.EndpointOrBuilder getLocalEndpointOrBuilder();

    /**
     * <pre>
     * (Optional) Endpoint information of the remote server, such as IP address,
     * port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint remote_endpoint = 7;</code>
     */
    boolean hasRemoteEndpoint();
    /**
     * <pre>
     * (Optional) Endpoint information of the remote server, such as IP address,
     * port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint remote_endpoint = 7;</code>
     */
    io.grpc.alts.internal.Handshaker.Endpoint getRemoteEndpoint();
    /**
     * <pre>
     * (Optional) Endpoint information of the remote server, such as IP address,
     * port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint remote_endpoint = 7;</code>
     */
    io.grpc.alts.internal.Handshaker.EndpointOrBuilder getRemoteEndpointOrBuilder();

    /**
     * <pre>
     * (Optional) If target name is provided, a secure naming check is performed
     * to verify that the peer authenticated identity is indeed authorized to run
     * the target name.
     * </pre>
     *
     * <code>string target_name = 8;</code>
     */
    java.lang.String getTargetName();
    /**
     * <pre>
     * (Optional) If target name is provided, a secure naming check is performed
     * to verify that the peer authenticated identity is indeed authorized to run
     * the target name.
     * </pre>
     *
     * <code>string target_name = 8;</code>
     */
    com.google.protobuf.ByteString
        getTargetNameBytes();

    /**
     * <pre>
     * (Optional) RPC protocol versions supported by the client.
     * </pre>
     *
     * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 9;</code>
     */
    boolean hasRpcVersions();
    /**
     * <pre>
     * (Optional) RPC protocol versions supported by the client.
     * </pre>
     *
     * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 9;</code>
     */
    io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions getRpcVersions();
    /**
     * <pre>
     * (Optional) RPC protocol versions supported by the client.
     * </pre>
     *
     * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 9;</code>
     */
    io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersionsOrBuilder getRpcVersionsOrBuilder();
  }
  /**
   * Protobuf type {@code grpc.gcp.StartClientHandshakeReq}
   */
  public  static final class StartClientHandshakeReq extends
      com.google.protobuf.GeneratedMessageV3 implements
      // @@protoc_insertion_point(message_implements:grpc.gcp.StartClientHandshakeReq)
      StartClientHandshakeReqOrBuilder {
  private static final long serialVersionUID = 0L;
    // Use StartClientHandshakeReq.newBuilder() to construct.
    private StartClientHandshakeReq(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
      super(builder);
    }
    private StartClientHandshakeReq() {
      handshakeSecurityProtocol_ = 0;
      applicationProtocols_ = com.google.protobuf.LazyStringArrayList.EMPTY;
      recordProtocols_ = com.google.protobuf.LazyStringArrayList.EMPTY;
      targetIdentities_ = java.util.Collections.emptyList();
      targetName_ = "";
    }

    @java.lang.Override
    public final com.google.protobuf.UnknownFieldSet
    getUnknownFields() {
      return this.unknownFields;
    }
    private StartClientHandshakeReq(
        com.google.protobuf.CodedInputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
      this();
      if (extensionRegistry == null) {
        throw new java.lang.NullPointerException();
      }
      int mutable_bitField0_ = 0;
      com.google.protobuf.UnknownFieldSet.Builder unknownFields =
          com.google.protobuf.UnknownFieldSet.newBuilder();
      try {
        boolean done = false;
        while (!done) {
          int tag = input.readTag();
          switch (tag) {
            case 0:
              done = true;
              break;
            default: {
              if (!parseUnknownFieldProto3(
                  input, unknownFields, extensionRegistry, tag)) {
                done = true;
              }
              break;
            }
            case 8: {
              int rawValue = input.readEnum();

              handshakeSecurityProtocol_ = rawValue;
              break;
            }
            case 18: {
              java.lang.String s = input.readStringRequireUtf8();
              if (!((mutable_bitField0_ & 0x00000002) == 0x00000002)) {
                applicationProtocols_ = new com.google.protobuf.LazyStringArrayList();
                mutable_bitField0_ |= 0x00000002;
              }
              applicationProtocols_.add(s);
              break;
            }
            case 26: {
              java.lang.String s = input.readStringRequireUtf8();
              if (!((mutable_bitField0_ & 0x00000004) == 0x00000004)) {
                recordProtocols_ = new com.google.protobuf.LazyStringArrayList();
                mutable_bitField0_ |= 0x00000004;
              }
              recordProtocols_.add(s);
              break;
            }
            case 34: {
              if (!((mutable_bitField0_ & 0x00000008) == 0x00000008)) {
                targetIdentities_ = new java.util.ArrayList<io.grpc.alts.internal.Handshaker.Identity>();
                mutable_bitField0_ |= 0x00000008;
              }
              targetIdentities_.add(
                  input.readMessage(io.grpc.alts.internal.Handshaker.Identity.parser(), extensionRegistry));
              break;
            }
            case 42: {
              io.grpc.alts.internal.Handshaker.Identity.Builder subBuilder = null;
              if (localIdentity_ != null) {
                subBuilder = localIdentity_.toBuilder();
              }
              localIdentity_ = input.readMessage(io.grpc.alts.internal.Handshaker.Identity.parser(), extensionRegistry);
              if (subBuilder != null) {
                subBuilder.mergeFrom(localIdentity_);
                localIdentity_ = subBuilder.buildPartial();
              }

              break;
            }
            case 50: {
              io.grpc.alts.internal.Handshaker.Endpoint.Builder subBuilder = null;
              if (localEndpoint_ != null) {
                subBuilder = localEndpoint_.toBuilder();
              }
              localEndpoint_ = input.readMessage(io.grpc.alts.internal.Handshaker.Endpoint.parser(), extensionRegistry);
              if (subBuilder != null) {
                subBuilder.mergeFrom(localEndpoint_);
                localEndpoint_ = subBuilder.buildPartial();
              }

              break;
            }
            case 58: {
              io.grpc.alts.internal.Handshaker.Endpoint.Builder subBuilder = null;
              if (remoteEndpoint_ != null) {
                subBuilder = remoteEndpoint_.toBuilder();
              }
              remoteEndpoint_ = input.readMessage(io.grpc.alts.internal.Handshaker.Endpoint.parser(), extensionRegistry);
              if (subBuilder != null) {
                subBuilder.mergeFrom(remoteEndpoint_);
                remoteEndpoint_ = subBuilder.buildPartial();
              }

              break;
            }
            case 66: {
              java.lang.String s = input.readStringRequireUtf8();

              targetName_ = s;
              break;
            }
            case 74: {
              io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.Builder subBuilder = null;
              if (rpcVersions_ != null) {
                subBuilder = rpcVersions_.toBuilder();
              }
              rpcVersions_ = input.readMessage(io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.parser(), extensionRegistry);
              if (subBuilder != null) {
                subBuilder.mergeFrom(rpcVersions_);
                rpcVersions_ = subBuilder.buildPartial();
              }

              break;
            }
          }
        }
      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
        throw e.setUnfinishedMessage(this);
      } catch (java.io.IOException e) {
        throw new com.google.protobuf.InvalidProtocolBufferException(
            e).setUnfinishedMessage(this);
      } finally {
        if (((mutable_bitField0_ & 0x00000002) == 0x00000002)) {
          applicationProtocols_ = applicationProtocols_.getUnmodifiableView();
        }
        if (((mutable_bitField0_ & 0x00000004) == 0x00000004)) {
          recordProtocols_ = recordProtocols_.getUnmodifiableView();
        }
        if (((mutable_bitField0_ & 0x00000008) == 0x00000008)) {
          targetIdentities_ = java.util.Collections.unmodifiableList(targetIdentities_);
        }
        this.unknownFields = unknownFields.build();
        makeExtensionsImmutable();
      }
    }
    public static final com.google.protobuf.Descriptors.Descriptor
        getDescriptor() {
      return io.grpc.alts.internal.Handshaker.internal_static_grpc_gcp_StartClientHandshakeReq_descriptor;
    }

    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
        internalGetFieldAccessorTable() {
      return io.grpc.alts.internal.Handshaker.internal_static_grpc_gcp_StartClientHandshakeReq_fieldAccessorTable
          .ensureFieldAccessorsInitialized(
              io.grpc.alts.internal.Handshaker.StartClientHandshakeReq.class, io.grpc.alts.internal.Handshaker.StartClientHandshakeReq.Builder.class);
    }

    private int bitField0_;
    public static final int HANDSHAKE_SECURITY_PROTOCOL_FIELD_NUMBER = 1;
    private int handshakeSecurityProtocol_;
    /**
     * <pre>
     * Handshake security protocol requested by the client.
     * </pre>
     *
     * <code>.grpc.gcp.HandshakeProtocol handshake_security_protocol = 1;</code>
     */
    public int getHandshakeSecurityProtocolValue() {
      return handshakeSecurityProtocol_;
    }
    /**
     * <pre>
     * Handshake security protocol requested by the client.
     * </pre>
     *
     * <code>.grpc.gcp.HandshakeProtocol handshake_security_protocol = 1;</code>
     */
    public io.grpc.alts.internal.Handshaker.HandshakeProtocol getHandshakeSecurityProtocol() {
      io.grpc.alts.internal.Handshaker.HandshakeProtocol result = io.grpc.alts.internal.Handshaker.HandshakeProtocol.valueOf(handshakeSecurityProtocol_);
      return result == null ? io.grpc.alts.internal.Handshaker.HandshakeProtocol.UNRECOGNIZED : result;
    }

    public static final int APPLICATION_PROTOCOLS_FIELD_NUMBER = 2;
    private com.google.protobuf.LazyStringList applicationProtocols_;
    /**
     * <pre>
     * The application protocols supported by the client, e.g., "h2" (for http2),
     * "grpc".
     * </pre>
     *
     * <code>repeated string application_protocols = 2;</code>
     */
    public com.google.protobuf.ProtocolStringList
        getApplicationProtocolsList() {
      return applicationProtocols_;
    }
    /**
     * <pre>
     * The application protocols supported by the client, e.g., "h2" (for http2),
     * "grpc".
     * </pre>
     *
     * <code>repeated string application_protocols = 2;</code>
     */
    public int getApplicationProtocolsCount() {
      return applicationProtocols_.size();
    }
    /**
     * <pre>
     * The application protocols supported by the client, e.g., "h2" (for http2),
     * "grpc".
     * </pre>
     *
     * <code>repeated string application_protocols = 2;</code>
     */
    public java.lang.String getApplicationProtocols(int index) {
      return applicationProtocols_.get(index);
    }
    /**
     * <pre>
     * The application protocols supported by the client, e.g., "h2" (for http2),
     * "grpc".
     * </pre>
     *
     * <code>repeated string application_protocols = 2;</code>
     */
    public com.google.protobuf.ByteString
        getApplicationProtocolsBytes(int index) {
      return applicationProtocols_.getByteString(index);
    }

    public static final int RECORD_PROTOCOLS_FIELD_NUMBER = 3;
    private com.google.protobuf.LazyStringList recordProtocols_;
    /**
     * <pre>
     * The record protocols supported by the client, e.g.,
     * "ALTSRP_GCM_AES128".
     * </pre>
     *
     * <code>repeated string record_protocols = 3;</code>
     */
    public com.google.protobuf.ProtocolStringList
        getRecordProtocolsList() {
      return recordProtocols_;
    }
    /**
     * <pre>
     * The record protocols supported by the client, e.g.,
     * "ALTSRP_GCM_AES128".
     * </pre>
     *
     * <code>repeated string record_protocols = 3;</code>
     */
    public int getRecordProtocolsCount() {
      return recordProtocols_.size();
    }
    /**
     * <pre>
     * The record protocols supported by the client, e.g.,
     * "ALTSRP_GCM_AES128".
     * </pre>
     *
     * <code>repeated string record_protocols = 3;</code>
     */
    public java.lang.String getRecordProtocols(int index) {
      return recordProtocols_.get(index);
    }
    /**
     * <pre>
     * The record protocols supported by the client, e.g.,
     * "ALTSRP_GCM_AES128".
     * </pre>
     *
     * <code>repeated string record_protocols = 3;</code>
     */
    public com.google.protobuf.ByteString
        getRecordProtocolsBytes(int index) {
      return recordProtocols_.getByteString(index);
    }

    public static final int TARGET_IDENTITIES_FIELD_NUMBER = 4;
    private java.util.List<io.grpc.alts.internal.Handshaker.Identity> targetIdentities_;
    /**
     * <pre>
     * (Optional) Describes which server identities are acceptable by the client.
     * If target identities are provided and none of them matches the peer
     * identity of the server, handshake will fail.
     * </pre>
     *
     * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
     */
    public java.util.List<io.grpc.alts.internal.Handshaker.Identity> getTargetIdentitiesList() {
      return targetIdentities_;
    }
    /**
     * <pre>
     * (Optional) Describes which server identities are acceptable by the client.
     * If target identities are provided and none of them matches the peer
     * identity of the server, handshake will fail.
     * </pre>
     *
     * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
     */
    public java.util.List<? extends io.grpc.alts.internal.Handshaker.IdentityOrBuilder> 
        getTargetIdentitiesOrBuilderList() {
      return targetIdentities_;
    }
    /**
     * <pre>
     * (Optional) Describes which server identities are acceptable by the client.
     * If target identities are provided and none of them matches the peer
     * identity of the server, handshake will fail.
     * </pre>
     *
     * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
     */
    public int getTargetIdentitiesCount() {
      return targetIdentities_.size();
    }
    /**
     * <pre>
     * (Optional) Describes which server identities are acceptable by the client.
     * If target identities are provided and none of them matches the peer
     * identity of the server, handshake will fail.
     * </pre>
     *
     * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
     */
    public io.grpc.alts.internal.Handshaker.Identity getTargetIdentities(int index) {
      return targetIdentities_.get(index);
    }
    /**
     * <pre>
     * (Optional) Describes which server identities are acceptable by the client.
     * If target identities are provided and none of them matches the peer
     * identity of the server, handshake will fail.
     * </pre>
     *
     * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
     */
    public io.grpc.alts.internal.Handshaker.IdentityOrBuilder getTargetIdentitiesOrBuilder(
        int index) {
      return targetIdentities_.get(index);
    }

    public static final int LOCAL_IDENTITY_FIELD_NUMBER = 5;
    private io.grpc.alts.internal.Handshaker.Identity localIdentity_;
    /**
     * <pre>
     * (Optional) Application may specify a local identity. Otherwise, the
     * handshaker chooses a default local identity.
     * </pre>
     *
     * <code>.grpc.gcp.Identity local_identity = 5;</code>
     */
    public boolean hasLocalIdentity() {
      return localIdentity_ != null;
    }
    /**
     * <pre>
     * (Optional) Application may specify a local identity. Otherwise, the
     * handshaker chooses a default local identity.
     * </pre>
     *
     * <code>.grpc.gcp.Identity local_identity = 5;</code>
     */
    public io.grpc.alts.internal.Handshaker.Identity getLocalIdentity() {
      return localIdentity_ == null ? io.grpc.alts.internal.Handshaker.Identity.getDefaultInstance() : localIdentity_;
    }
    /**
     * <pre>
     * (Optional) Application may specify a local identity. Otherwise, the
     * handshaker chooses a default local identity.
     * </pre>
     *
     * <code>.grpc.gcp.Identity local_identity = 5;</code>
     */
    public io.grpc.alts.internal.Handshaker.IdentityOrBuilder getLocalIdentityOrBuilder() {
      return getLocalIdentity();
    }

    public static final int LOCAL_ENDPOINT_FIELD_NUMBER = 6;
    private io.grpc.alts.internal.Handshaker.Endpoint localEndpoint_;
    /**
     * <pre>
     * (Optional) Local endpoint information of the connection to the server,
     * such as local IP address, port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint local_endpoint = 6;</code>
     */
    public boolean hasLocalEndpoint() {
      return localEndpoint_ != null;
    }
    /**
     * <pre>
     * (Optional) Local endpoint information of the connection to the server,
     * such as local IP address, port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint local_endpoint = 6;</code>
     */
    public io.grpc.alts.internal.Handshaker.Endpoint getLocalEndpoint() {
      return localEndpoint_ == null ? io.grpc.alts.internal.Handshaker.Endpoint.getDefaultInstance() : localEndpoint_;
    }
    /**
     * <pre>
     * (Optional) Local endpoint information of the connection to the server,
     * such as local IP address, port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint local_endpoint = 6;</code>
     */
    public io.grpc.alts.internal.Handshaker.EndpointOrBuilder getLocalEndpointOrBuilder() {
      return getLocalEndpoint();
    }

    public static final int REMOTE_ENDPOINT_FIELD_NUMBER = 7;
    private io.grpc.alts.internal.Handshaker.Endpoint remoteEndpoint_;
    /**
     * <pre>
     * (Optional) Endpoint information of the remote server, such as IP address,
     * port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint remote_endpoint = 7;</code>
     */
    public boolean hasRemoteEndpoint() {
      return remoteEndpoint_ != null;
    }
    /**
     * <pre>
     * (Optional) Endpoint information of the remote server, such as IP address,
     * port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint remote_endpoint = 7;</code>
     */
    public io.grpc.alts.internal.Handshaker.Endpoint getRemoteEndpoint() {
      return remoteEndpoint_ == null ? io.grpc.alts.internal.Handshaker.Endpoint.getDefaultInstance() : remoteEndpoint_;
    }
    /**
     * <pre>
     * (Optional) Endpoint information of the remote server, such as IP address,
     * port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint remote_endpoint = 7;</code>
     */
    public io.grpc.alts.internal.Handshaker.EndpointOrBuilder getRemoteEndpointOrBuilder() {
      return getRemoteEndpoint();
    }

    public static final int TARGET_NAME_FIELD_NUMBER = 8;
    private volatile java.lang.Object targetName_;
    /**
     * <pre>
     * (Optional) If target name is provided, a secure naming check is performed
     * to verify that the peer authenticated identity is indeed authorized to run
     * the target name.
     * </pre>
     *
     * <code>string target_name = 8;</code>
     */
    public java.lang.String getTargetName() {
      java.lang.Object ref = targetName_;
      if (ref instanceof java.lang.String) {
        return (java.lang.String) ref;
      } else {
        com.google.protobuf.ByteString bs = 
            (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        targetName_ = s;
        return s;
      }
    }
    /**
     * <pre>
     * (Optional) If target name is provided, a secure naming check is performed
     * to verify that the peer authenticated identity is indeed authorized to run
     * the target name.
     * </pre>
     *
     * <code>string target_name = 8;</code>
     */
    public com.google.protobuf.ByteString
        getTargetNameBytes() {
      java.lang.Object ref = targetName_;
      if (ref instanceof java.lang.String) {
        com.google.protobuf.ByteString b = 
            com.google.protobuf.ByteString.copyFromUtf8(
                (java.lang.String) ref);
        targetName_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }

    public static final int RPC_VERSIONS_FIELD_NUMBER = 9;
    private io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions rpcVersions_;
    /**
     * <pre>
     * (Optional) RPC protocol versions supported by the client.
     * </pre>
     *
     * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 9;</code>
     */
    public boolean hasRpcVersions() {
      return rpcVersions_ != null;
    }
    /**
     * <pre>
     * (Optional) RPC protocol versions supported by the client.
     * </pre>
     *
     * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 9;</code>
     */
    public io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions getRpcVersions() {
      return rpcVersions_ == null ? io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.getDefaultInstance() : rpcVersions_;
    }
    /**
     * <pre>
     * (Optional) RPC protocol versions supported by the client.
     * </pre>
     *
     * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 9;</code>
     */
    public io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersionsOrBuilder getRpcVersionsOrBuilder() {
      return getRpcVersions();
    }

    private byte memoizedIsInitialized = -1;
    public final boolean isInitialized() {
      byte isInitialized = memoizedIsInitialized;
      if (isInitialized == 1) return true;
      if (isInitialized == 0) return false;

      memoizedIsInitialized = 1;
      return true;
    }

    public void writeTo(com.google.protobuf.CodedOutputStream output)
                        throws java.io.IOException {
      if (handshakeSecurityProtocol_ != io.grpc.alts.internal.Handshaker.HandshakeProtocol.HANDSHAKE_PROTOCOL_UNSPECIFIED.getNumber()) {
        output.writeEnum(1, handshakeSecurityProtocol_);
      }
      for (int i = 0; i < applicationProtocols_.size(); i++) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 2, applicationProtocols_.getRaw(i));
      }
      for (int i = 0; i < recordProtocols_.size(); i++) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 3, recordProtocols_.getRaw(i));
      }
      for (int i = 0; i < targetIdentities_.size(); i++) {
        output.writeMessage(4, targetIdentities_.get(i));
      }
      if (localIdentity_ != null) {
        output.writeMessage(5, getLocalIdentity());
      }
      if (localEndpoint_ != null) {
        output.writeMessage(6, getLocalEndpoint());
      }
      if (remoteEndpoint_ != null) {
        output.writeMessage(7, getRemoteEndpoint());
      }
      if (!getTargetNameBytes().isEmpty()) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 8, targetName_);
      }
      if (rpcVersions_ != null) {
        output.writeMessage(9, getRpcVersions());
      }
      unknownFields.writeTo(output);
    }

    public int getSerializedSize() {
      int size = memoizedSize;
      if (size != -1) return size;

      size = 0;
      if (handshakeSecurityProtocol_ != io.grpc.alts.internal.Handshaker.HandshakeProtocol.HANDSHAKE_PROTOCOL_UNSPECIFIED.getNumber()) {
        size += com.google.protobuf.CodedOutputStream
          .computeEnumSize(1, handshakeSecurityProtocol_);
      }
      {
        int dataSize = 0;
        for (int i = 0; i < applicationProtocols_.size(); i++) {
          dataSize += computeStringSizeNoTag(applicationProtocols_.getRaw(i));
        }
        size += dataSize;
        size += 1 * getApplicationProtocolsList().size();
      }
      {
        int dataSize = 0;
        for (int i = 0; i < recordProtocols_.size(); i++) {
          dataSize += computeStringSizeNoTag(recordProtocols_.getRaw(i));
        }
        size += dataSize;
        size += 1 * getRecordProtocolsList().size();
      }
      for (int i = 0; i < targetIdentities_.size(); i++) {
        size += com.google.protobuf.CodedOutputStream
          .computeMessageSize(4, targetIdentities_.get(i));
      }
      if (localIdentity_ != null) {
        size += com.google.protobuf.CodedOutputStream
          .computeMessageSize(5, getLocalIdentity());
      }
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      /**
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      /**
       * <pre>
       * The record protocols supported by the client, e.g.,
       * "ALTSRP_GCM_AES128".
       * </pre>
       *
       * <code>repeated string record_protocols = 3;</code>
       */
      public com.google.protobuf.ByteString
          getRecordProtocolsBytes(int index) {
        return recordProtocols_.getByteString(index);
      }
      /**
       * <pre>
       * The record protocols supported by the client, e.g.,
       * "ALTSRP_GCM_AES128".
       * </pre>
       *
       * <code>repeated string record_protocols = 3;</code>
       */
      public Builder setRecordProtocols(
          int index, java.lang.String value) {
        if (value == null) {
    throw new NullPointerException();
  }
  ensureRecordProtocolsIsMutable();
        recordProtocols_.set(index, value);
        onChanged();
        return this;
      }
      /**
       * <pre>
       * The record protocols supported by the client, e.g.,
       * "ALTSRP_GCM_AES128".
       * </pre>
       *
       * <code>repeated string record_protocols = 3;</code>
       */
      public Builder addRecordProtocols(
          java.lang.String value) {
        if (value == null) {
    throw new NullPointerException();
  }
  ensureRecordProtocolsIsMutable();
        recordProtocols_.add(value);
        onChanged();
        return this;
      }
      /**
       * <pre>
       * The record protocols supported by the client, e.g.,
       * "ALTSRP_GCM_AES128".
       * </pre>
       *
       * <code>repeated string record_protocols = 3;</code>
       */
      public Builder addAllRecordProtocols(
          java.lang.Iterable<java.lang.String> values) {
        ensureRecordProtocolsIsMutable();
        com.google.protobuf.AbstractMessageLite.Builder.addAll(
            values, recordProtocols_);
        onChanged();
        return this;
      }
      /**
       * <pre>
       * The record protocols supported by the client, e.g.,
       * "ALTSRP_GCM_AES128".
       * </pre>
       *
       * <code>repeated string record_protocols = 3;</code>
       */
      public Builder clearRecordProtocols() {
        recordProtocols_ = com.google.protobuf.LazyStringArrayList.EMPTY;
        bitField0_ = (bitField0_ & ~0x00000004);
        onChanged();
        return this;
      }
      /**
       * <pre>
       * The record protocols supported by the client, e.g.,
       * "ALTSRP_GCM_AES128".
       * </pre>
       *
       * <code>repeated string record_protocols = 3;</code>
       */
      public Builder addRecordProtocolsBytes(
          com.google.protobuf.ByteString value) {
        if (value == null) {
    throw new NullPointerException();
  }
  checkByteStringIsUtf8(value);
        ensureRecordProtocolsIsMutable();
        recordProtocols_.add(value);
        onChanged();
        return this;
      }

      private java.util.List<io.grpc.alts.internal.Handshaker.Identity> targetIdentities_ =
        java.util.Collections.emptyList();
      private void ensureTargetIdentitiesIsMutable() {
        if (!((bitField0_ & 0x00000008) == 0x00000008)) {
          targetIdentities_ = new java.util.ArrayList<io.grpc.alts.internal.Handshaker.Identity>(targetIdentities_);
          bitField0_ |= 0x00000008;
         }
      }

      private com.google.protobuf.RepeatedFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.Identity, io.grpc.alts.internal.Handshaker.Identity.Builder, io.grpc.alts.internal.Handshaker.IdentityOrBuilder> targetIdentitiesBuilder_;

      /**
       * <pre>
       * (Optional) Describes which server identities are acceptable by the client.
       * If target identities are provided and none of them matches the peer
       * identity of the server, handshake will fail.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
       */
      public java.util.List<io.grpc.alts.internal.Handshaker.Identity> getTargetIdentitiesList() {
        if (targetIdentitiesBuilder_ == null) {
          return java.util.Collections.unmodifiableList(targetIdentities_);
        } else {
          return targetIdentitiesBuilder_.getMessageList();
        }
      }
      /**
       * <pre>
       * (Optional) Describes which server identities are acceptable by the client.
       * If target identities are provided and none of them matches the peer
       * identity of the server, handshake will fail.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
       */
      public int getTargetIdentitiesCount() {
        if (targetIdentitiesBuilder_ == null) {
          return targetIdentities_.size();
        } else {
          return targetIdentitiesBuilder_.getCount();
        }
      }
      /**
       * <pre>
       * (Optional) Describes which server identities are acceptable by the client.
       * If target identities are provided and none of them matches the peer
       * identity of the server, handshake will fail.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
       */
      public io.grpc.alts.internal.Handshaker.Identity getTargetIdentities(int index) {
        if (targetIdentitiesBuilder_ == null) {
          return targetIdentities_.get(index);
        } else {
          return targetIdentitiesBuilder_.getMessage(index);
        }
      }
      /**
       * <pre>
       * (Optional) Describes which server identities are acceptable by the client.
       * If target identities are provided and none of them matches the peer
       * identity of the server, handshake will fail.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
       */
      public Builder setTargetIdentities(
          int index, io.grpc.alts.internal.Handshaker.Identity value) {
        if (targetIdentitiesBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          ensureTargetIdentitiesIsMutable();
          targetIdentities_.set(index, value);
          onChanged();
        } else {
          targetIdentitiesBuilder_.setMessage(index, value);
        }
        return this;
      }
      /**
       * <pre>
       * (Optional) Describes which server identities are acceptable by the client.
       * If target identities are provided and none of them matches the peer
       * identity of the server, handshake will fail.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
       */
      public Builder setTargetIdentities(
          int index, io.grpc.alts.internal.Handshaker.Identity.Builder builderForValue) {
        if (targetIdentitiesBuilder_ == null) {
          ensureTargetIdentitiesIsMutable();
          targetIdentities_.set(index, builderForValue.build());
          onChanged();
        } else {
          targetIdentitiesBuilder_.setMessage(index, builderForValue.build());
        }
        return this;
      }
      /**
       * <pre>
       * (Optional) Describes which server identities are acceptable by the client.
       * If target identities are provided and none of them matches the peer
       * identity of the server, handshake will fail.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
       */
      public Builder addTargetIdentities(io.grpc.alts.internal.Handshaker.Identity value) {
        if (targetIdentitiesBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          ensureTargetIdentitiesIsMutable();
          targetIdentities_.add(value);
          onChanged();
        } else {
          targetIdentitiesBuilder_.addMessage(value);
        }
        return this;
      }
      /**
       * <pre>
       * (Optional) Describes which server identities are acceptable by the client.
       * If target identities are provided and none of them matches the peer
       * identity of the server, handshake will fail.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
       */
      public Builder addTargetIdentities(
          int index, io.grpc.alts.internal.Handshaker.Identity value) {
        if (targetIdentitiesBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          ensureTargetIdentitiesIsMutable();
          targetIdentities_.add(index, value);
          onChanged();
        } else {
          targetIdentitiesBuilder_.addMessage(index, value);
        }
        return this;
      }
      /**
       * <pre>
       * (Optional) Describes which server identities are acceptable by the client.
       * If target identities are provided and none of them matches the peer
       * identity of the server, handshake will fail.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
       */
      public Builder addTargetIdentities(
          io.grpc.alts.internal.Handshaker.Identity.Builder builderForValue) {
        if (targetIdentitiesBuilder_ == null) {
          ensureTargetIdentitiesIsMutable();
          targetIdentities_.add(builderForValue.build());
          onChanged();
        } else {
          targetIdentitiesBuilder_.addMessage(builderForValue.build());
        }
        return this;
      }
      /**
       * <pre>
       * (Optional) Describes which server identities are acceptable by the client.
       * If target identities are provided and none of them matches the peer
       * identity of the server, handshake will fail.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
       */
      public Builder addTargetIdentities(
          int index, io.grpc.alts.internal.Handshaker.Identity.Builder builderForValue) {
        if (targetIdentitiesBuilder_ == null) {
          ensureTargetIdentitiesIsMutable();
          targetIdentities_.add(index, builderForValue.build());
          onChanged();
        } else {
          targetIdentitiesBuilder_.addMessage(index, builderForValue.build());
        }
        return this;
      }
      /**
       * <pre>
       * (Optional) Describes which server identities are acceptable by the client.
       * If target identities are provided and none of them matches the peer
       * identity of the server, handshake will fail.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
       */
      public Builder addAllTargetIdentities(
          java.lang.Iterable<? extends io.grpc.alts.internal.Handshaker.Identity> values) {
        if (targetIdentitiesBuilder_ == null) {
          ensureTargetIdentitiesIsMutable();
          com.google.protobuf.AbstractMessageLite.Builder.addAll(
              values, targetIdentities_);
          onChanged();
        } else {
          targetIdentitiesBuilder_.addAllMessages(values);
        }
        return this;
      }
      /**
       * <pre>
       * (Optional) Describes which server identities are acceptable by the client.
       * If target identities are provided and none of them matches the peer
       * identity of the server, handshake will fail.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
       */
      public Builder clearTargetIdentities() {
        if (targetIdentitiesBuilder_ == null) {
          targetIdentities_ = java.util.Collections.emptyList();
          bitField0_ = (bitField0_ & ~0x00000008);
          onChanged();
        } else {
          targetIdentitiesBuilder_.clear();
        }
        return this;
      }
      /**
       * <pre>
       * (Optional) Describes which server identities are acceptable by the client.
       * If target identities are provided and none of them matches the peer
       * identity of the server, handshake will fail.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
       */
      public Builder removeTargetIdentities(int index) {
        if (targetIdentitiesBuilder_ == null) {
          ensureTargetIdentitiesIsMutable();
          targetIdentities_.remove(index);
          onChanged();
        } else {
          targetIdentitiesBuilder_.remove(index);
        }
        return this;
      }
      /**
       * <pre>
       * (Optional) Describes which server identities are acceptable by the client.
       * If target identities are provided and none of them matches the peer
       * identity of the server, handshake will fail.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
       */
      public io.grpc.alts.internal.Handshaker.Identity.Builder getTargetIdentitiesBuilder(
          int index) {
        return getTargetIdentitiesFieldBuilder().getBuilder(index);
      }
      /**
       * <pre>
       * (Optional) Describes which server identities are acceptable by the client.
       * If target identities are provided and none of them matches the peer
       * identity of the server, handshake will fail.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
       */
      public io.grpc.alts.internal.Handshaker.IdentityOrBuilder getTargetIdentitiesOrBuilder(
          int index) {
        if (targetIdentitiesBuilder_ == null) {
          return targetIdentities_.get(index);  } else {
          return targetIdentitiesBuilder_.getMessageOrBuilder(index);
        }
      }
      /**
       * <pre>
       * (Optional) Describes which server identities are acceptable by the client.
       * If target identities are provided and none of them matches the peer
       * identity of the server, handshake will fail.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
       */
      public java.util.List<? extends io.grpc.alts.internal.Handshaker.IdentityOrBuilder> 
           getTargetIdentitiesOrBuilderList() {
        if (targetIdentitiesBuilder_ != null) {
          return targetIdentitiesBuilder_.getMessageOrBuilderList();
        } else {
          return java.util.Collections.unmodifiableList(targetIdentities_);
        }
      }
      /**
       * <pre>
       * (Optional) Describes which server identities are acceptable by the client.
       * If target identities are provided and none of them matches the peer
       * identity of the server, handshake will fail.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
       */
      public io.grpc.alts.internal.Handshaker.Identity.Builder addTargetIdentitiesBuilder() {
        return getTargetIdentitiesFieldBuilder().addBuilder(
            io.grpc.alts.internal.Handshaker.Identity.getDefaultInstance());
      }
      /**
       * <pre>
       * (Optional) Describes which server identities are acceptable by the client.
       * If target identities are provided and none of them matches the peer
       * identity of the server, handshake will fail.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
       */
      public io.grpc.alts.internal.Handshaker.Identity.Builder addTargetIdentitiesBuilder(
          int index) {
        return getTargetIdentitiesFieldBuilder().addBuilder(
            index, io.grpc.alts.internal.Handshaker.Identity.getDefaultInstance());
      }
      /**
       * <pre>
       * (Optional) Describes which server identities are acceptable by the client.
       * If target identities are provided and none of them matches the peer
       * identity of the server, handshake will fail.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity target_identities = 4;</code>
       */
      public java.util.List<io.grpc.alts.internal.Handshaker.Identity.Builder> 
           getTargetIdentitiesBuilderList() {
        return getTargetIdentitiesFieldBuilder().getBuilderList();
      }
      private com.google.protobuf.RepeatedFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.Identity, io.grpc.alts.internal.Handshaker.Identity.Builder, io.grpc.alts.internal.Handshaker.IdentityOrBuilder> 
          getTargetIdentitiesFieldBuilder() {
        if (targetIdentitiesBuilder_ == null) {
          targetIdentitiesBuilder_ = new com.google.protobuf.RepeatedFieldBuilderV3<
              io.grpc.alts.internal.Handshaker.Identity, io.grpc.alts.internal.Handshaker.Identity.Builder, io.grpc.alts.internal.Handshaker.IdentityOrBuilder>(
                  targetIdentities_,
                  ((bitField0_ & 0x00000008) == 0x00000008),
                  getParentForChildren(),
                  isClean());
          targetIdentities_ = null;
        }
        return targetIdentitiesBuilder_;
      }

      private io.grpc.alts.internal.Handshaker.Identity localIdentity_ = null;
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.Identity, io.grpc.alts.internal.Handshaker.Identity.Builder, io.grpc.alts.internal.Handshaker.IdentityOrBuilder> localIdentityBuilder_;
      /**
       * <pre>
       * (Optional) Application may specify a local identity. Otherwise, the
       * handshaker chooses a default local identity.
       * </pre>
       *
       * <code>.grpc.gcp.Identity local_identity = 5;</code>
       */
      public boolean hasLocalIdentity() {
        return localIdentityBuilder_ != null || localIdentity_ != null;
      }
      /**
       * <pre>
       * (Optional) Application may specify a local identity. Otherwise, the
       * handshaker chooses a default local identity.
       * </pre>
       *
       * <code>.grpc.gcp.Identity local_identity = 5;</code>
       */
      public io.grpc.alts.internal.Handshaker.Identity getLocalIdentity() {
        if (localIdentityBuilder_ == null) {
          return localIdentity_ == null ? io.grpc.alts.internal.Handshaker.Identity.getDefaultInstance() : localIdentity_;
        } else {
          return localIdentityBuilder_.getMessage();
        }
      }
      /**
       * <pre>
       * (Optional) Application may specify a local identity. Otherwise, the
       * handshaker chooses a default local identity.
       * </pre>
       *
       * <code>.grpc.gcp.Identity local_identity = 5;</code>
       */
      public Builder setLocalIdentity(io.grpc.alts.internal.Handshaker.Identity value) {
        if (localIdentityBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          localIdentity_ = value;
          onChanged();
        } else {
          localIdentityBuilder_.setMessage(value);
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Application may specify a local identity. Otherwise, the
       * handshaker chooses a default local identity.
       * </pre>
       *
       * <code>.grpc.gcp.Identity local_identity = 5;</code>
       */
      public Builder setLocalIdentity(
          io.grpc.alts.internal.Handshaker.Identity.Builder builderForValue) {
        if (localIdentityBuilder_ == null) {
          localIdentity_ = builderForValue.build();
          onChanged();
        } else {
          localIdentityBuilder_.setMessage(builderForValue.build());
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Application may specify a local identity. Otherwise, the
       * handshaker chooses a default local identity.
       * </pre>
       *
       * <code>.grpc.gcp.Identity local_identity = 5;</code>
       */
      public Builder mergeLocalIdentity(io.grpc.alts.internal.Handshaker.Identity value) {
        if (localIdentityBuilder_ == null) {
          if (localIdentity_ != null) {
            localIdentity_ =
              io.grpc.alts.internal.Handshaker.Identity.newBuilder(localIdentity_).mergeFrom(value).buildPartial();
          } else {
            localIdentity_ = value;
          }
          onChanged();
        } else {
          localIdentityBuilder_.mergeFrom(value);
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Application may specify a local identity. Otherwise, the
       * handshaker chooses a default local identity.
       * </pre>
       *
       * <code>.grpc.gcp.Identity local_identity = 5;</code>
       */
      public Builder clearLocalIdentity() {
        if (localIdentityBuilder_ == null) {
          localIdentity_ = null;
          onChanged();
        } else {
          localIdentity_ = null;
          localIdentityBuilder_ = null;
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Application may specify a local identity. Otherwise, the
       * handshaker chooses a default local identity.
       * </pre>
       *
       * <code>.grpc.gcp.Identity local_identity = 5;</code>
       */
      public io.grpc.alts.internal.Handshaker.Identity.Builder getLocalIdentityBuilder() {
        
        onChanged();
        return getLocalIdentityFieldBuilder().getBuilder();
      }
      /**
       * <pre>
       * (Optional) Application may specify a local identity. Otherwise, the
       * handshaker chooses a default local identity.
       * </pre>
       *
       * <code>.grpc.gcp.Identity local_identity = 5;</code>
       */
      public io.grpc.alts.internal.Handshaker.IdentityOrBuilder getLocalIdentityOrBuilder() {
        if (localIdentityBuilder_ != null) {
          return localIdentityBuilder_.getMessageOrBuilder();
        } else {
          return localIdentity_ == null ?
              io.grpc.alts.internal.Handshaker.Identity.getDefaultInstance() : localIdentity_;
        }
      }
      /**
       * <pre>
       * (Optional) Application may specify a local identity. Otherwise, the
       * handshaker chooses a default local identity.
       * </pre>
       *
       * <code>.grpc.gcp.Identity local_identity = 5;</code>
       */
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.Identity, io.grpc.alts.internal.Handshaker.Identity.Builder, io.grpc.alts.internal.Handshaker.IdentityOrBuilder> 
          getLocalIdentityFieldBuilder() {
        if (localIdentityBuilder_ == null) {
          localIdentityBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
              io.grpc.alts.internal.Handshaker.Identity, io.grpc.alts.internal.Handshaker.Identity.Builder, io.grpc.alts.internal.Handshaker.IdentityOrBuilder>(
                  getLocalIdentity(),
                  getParentForChildren(),
                  isClean());
          localIdentity_ = null;
        }
        return localIdentityBuilder_;
      }

      private io.grpc.alts.internal.Handshaker.Endpoint localEndpoint_ = null;
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.Endpoint, io.grpc.alts.internal.Handshaker.Endpoint.Builder, io.grpc.alts.internal.Handshaker.EndpointOrBuilder> localEndpointBuilder_;
      /**
       * <pre>
       * (Optional) Local endpoint information of the connection to the server,
       * such as local IP address, port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint local_endpoint = 6;</code>
       */
      public boolean hasLocalEndpoint() {
        return localEndpointBuilder_ != null || localEndpoint_ != null;
      }
      /**
       * <pre>
       * (Optional) Local endpoint information of the connection to the server,
       * such as local IP address, port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint local_endpoint = 6;</code>
       */
      public io.grpc.alts.internal.Handshaker.Endpoint getLocalEndpoint() {
        if (localEndpointBuilder_ == null) {
          return localEndpoint_ == null ? io.grpc.alts.internal.Handshaker.Endpoint.getDefaultInstance() : localEndpoint_;
        } else {
          return localEndpointBuilder_.getMessage();
        }
      }
      /**
       * <pre>
       * (Optional) Local endpoint information of the connection to the server,
       * such as local IP address, port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint local_endpoint = 6;</code>
       */
      public Builder setLocalEndpoint(io.grpc.alts.internal.Handshaker.Endpoint value) {
        if (localEndpointBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          localEndpoint_ = value;
          onChanged();
        } else {
          localEndpointBuilder_.setMessage(value);
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Local endpoint information of the connection to the server,
       * such as local IP address, port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint local_endpoint = 6;</code>
       */
      public Builder setLocalEndpoint(
          io.grpc.alts.internal.Handshaker.Endpoint.Builder builderForValue) {
        if (localEndpointBuilder_ == null) {
          localEndpoint_ = builderForValue.build();
          onChanged();
        } else {
          localEndpointBuilder_.setMessage(builderForValue.build());
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Local endpoint information of the connection to the server,
       * such as local IP address, port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint local_endpoint = 6;</code>
       */
      public Builder mergeLocalEndpoint(io.grpc.alts.internal.Handshaker.Endpoint value) {
        if (localEndpointBuilder_ == null) {
          if (localEndpoint_ != null) {
            localEndpoint_ =
              io.grpc.alts.internal.Handshaker.Endpoint.newBuilder(localEndpoint_).mergeFrom(value).buildPartial();
          } else {
            localEndpoint_ = value;
          }
          onChanged();
        } else {
          localEndpointBuilder_.mergeFrom(value);
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Local endpoint information of the connection to the server,
       * such as local IP address, port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint local_endpoint = 6;</code>
       */
      public Builder clearLocalEndpoint() {
        if (localEndpointBuilder_ == null) {
          localEndpoint_ = null;
          onChanged();
        } else {
          localEndpoint_ = null;
          localEndpointBuilder_ = null;
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Local endpoint information of the connection to the server,
       * such as local IP address, port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint local_endpoint = 6;</code>
       */
      public io.grpc.alts.internal.Handshaker.Endpoint.Builder getLocalEndpointBuilder() {
        
        onChanged();
        return getLocalEndpointFieldBuilder().getBuilder();
      }
      /**
       * <pre>
       * (Optional) Local endpoint information of the connection to the server,
       * such as local IP address, port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint local_endpoint = 6;</code>
       */
      public io.grpc.alts.internal.Handshaker.EndpointOrBuilder getLocalEndpointOrBuilder() {
        if (localEndpointBuilder_ != null) {
          return localEndpointBuilder_.getMessageOrBuilder();
        } else {
          return localEndpoint_ == null ?
              io.grpc.alts.internal.Handshaker.Endpoint.getDefaultInstance() : localEndpoint_;
        }
      }
      /**
       * <pre>
       * (Optional) Local endpoint information of the connection to the server,
       * such as local IP address, port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint local_endpoint = 6;</code>
       */
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.Endpoint, io.grpc.alts.internal.Handshaker.Endpoint.Builder, io.grpc.alts.internal.Handshaker.EndpointOrBuilder> 
          getLocalEndpointFieldBuilder() {
        if (localEndpointBuilder_ == null) {
          localEndpointBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
              io.grpc.alts.internal.Handshaker.Endpoint, io.grpc.alts.internal.Handshaker.Endpoint.Builder, io.grpc.alts.internal.Handshaker.EndpointOrBuilder>(
                  getLocalEndpoint(),
                  getParentForChildren(),
                  isClean());
          localEndpoint_ = null;
        }
        return localEndpointBuilder_;
      }

      private io.grpc.alts.internal.Handshaker.Endpoint remoteEndpoint_ = null;
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.Endpoint, io.grpc.alts.internal.Handshaker.Endpoint.Builder, io.grpc.alts.internal.Handshaker.EndpointOrBuilder> remoteEndpointBuilder_;
      /**
       * <pre>
       * (Optional) Endpoint information of the remote server, such as IP address,
       * port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint remote_endpoint = 7;</code>
       */
      public boolean hasRemoteEndpoint() {
        return remoteEndpointBuilder_ != null || remoteEndpoint_ != null;
      }
      /**
       * <pre>
       * (Optional) Endpoint information of the remote server, such as IP address,
       * port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint remote_endpoint = 7;</code>
       */
      public io.grpc.alts.internal.Handshaker.Endpoint getRemoteEndpoint() {
        if (remoteEndpointBuilder_ == null) {
          return remoteEndpoint_ == null ? io.grpc.alts.internal.Handshaker.Endpoint.getDefaultInstance() : remoteEndpoint_;
        } else {
          return remoteEndpointBuilder_.getMessage();
        }
      }
      /**
       * <pre>
       * (Optional) Endpoint information of the remote server, such as IP address,
       * port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint remote_endpoint = 7;</code>
       */
      public Builder setRemoteEndpoint(io.grpc.alts.internal.Handshaker.Endpoint value) {
        if (remoteEndpointBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          remoteEndpoint_ = value;
          onChanged();
        } else {
          remoteEndpointBuilder_.setMessage(value);
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Endpoint information of the remote server, such as IP address,
       * port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint remote_endpoint = 7;</code>
       */
      public Builder setRemoteEndpoint(
          io.grpc.alts.internal.Handshaker.Endpoint.Builder builderForValue) {
        if (remoteEndpointBuilder_ == null) {
          remoteEndpoint_ = builderForValue.build();
          onChanged();
        } else {
          remoteEndpointBuilder_.setMessage(builderForValue.build());
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Endpoint information of the remote server, such as IP address,
       * port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint remote_endpoint = 7;</code>
       */
      public Builder mergeRemoteEndpoint(io.grpc.alts.internal.Handshaker.Endpoint value) {
        if (remoteEndpointBuilder_ == null) {
          if (remoteEndpoint_ != null) {
            remoteEndpoint_ =
              io.grpc.alts.internal.Handshaker.Endpoint.newBuilder(remoteEndpoint_).mergeFrom(value).buildPartial();
          } else {
            remoteEndpoint_ = value;
          }
          onChanged();
        } else {
          remoteEndpointBuilder_.mergeFrom(value);
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Endpoint information of the remote server, such as IP address,
       * port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint remote_endpoint = 7;</code>
       */
      public Builder clearRemoteEndpoint() {
        if (remoteEndpointBuilder_ == null) {
          remoteEndpoint_ = null;
          onChanged();
        } else {
          remoteEndpoint_ = null;
          remoteEndpointBuilder_ = null;
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Endpoint information of the remote server, such as IP address,
       * port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint remote_endpoint = 7;</code>
       */
      public io.grpc.alts.internal.Handshaker.Endpoint.Builder getRemoteEndpointBuilder() {
        
        onChanged();
        return getRemoteEndpointFieldBuilder().getBuilder();
      }
      /**
       * <pre>
       * (Optional) Endpoint information of the remote server, such as IP address,
       * port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint remote_endpoint = 7;</code>
       */
      public io.grpc.alts.internal.Handshaker.EndpointOrBuilder getRemoteEndpointOrBuilder() {
        if (remoteEndpointBuilder_ != null) {
          return remoteEndpointBuilder_.getMessageOrBuilder();
        } else {
          return remoteEndpoint_ == null ?
              io.grpc.alts.internal.Handshaker.Endpoint.getDefaultInstance() : remoteEndpoint_;
        }
      }
      /**
       * <pre>
       * (Optional) Endpoint information of the remote server, such as IP address,
       * port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint remote_endpoint = 7;</code>
       */
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.Endpoint, io.grpc.alts.internal.Handshaker.Endpoint.Builder, io.grpc.alts.internal.Handshaker.EndpointOrBuilder> 
          getRemoteEndpointFieldBuilder() {
        if (remoteEndpointBuilder_ == null) {
          remoteEndpointBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
              io.grpc.alts.internal.Handshaker.Endpoint, io.grpc.alts.internal.Handshaker.Endpoint.Builder, io.grpc.alts.internal.Handshaker.EndpointOrBuilder>(
                  getRemoteEndpoint(),
                  getParentForChildren(),
                  isClean());
          remoteEndpoint_ = null;
        }
        return remoteEndpointBuilder_;
      }

      private java.lang.Object targetName_ = "";
      /**
       * <pre>
       * (Optional) If target name is provided, a secure naming check is performed
       * to verify that the peer authenticated identity is indeed authorized to run
       * the target name.
       * </pre>
       *
       * <code>string target_name = 8;</code>
       */
      public java.lang.String getTargetName() {
        java.lang.Object ref = targetName_;
        if (!(ref instanceof java.lang.String)) {
          com.google.protobuf.ByteString bs =
              (com.google.protobuf.ByteString) ref;
          java.lang.String s = bs.toStringUtf8();
          targetName_ = s;
          return s;
        } else {
          return (java.lang.String) ref;
        }
      }
      /**
       * <pre>
       * (Optional) If target name is provided, a secure naming check is performed
       * to verify that the peer authenticated identity is indeed authorized to run
       * the target name.
       * </pre>
       *
       * <code>string target_name = 8;</code>
       */
      public com.google.protobuf.ByteString
          getTargetNameBytes() {
        java.lang.Object ref = targetName_;
        if (ref instanceof String) {
          com.google.protobuf.ByteString b = 
              com.google.protobuf.ByteString.copyFromUtf8(
                  (java.lang.String) ref);
          targetName_ = b;
          return b;
        } else {
          return (com.google.protobuf.ByteString) ref;
        }
      }
      /**
       * <pre>
       * (Optional) If target name is provided, a secure naming check is performed
       * to verify that the peer authenticated identity is indeed authorized to run
       * the target name.
       * </pre>
       *
       * <code>string target_name = 8;</code>
       */
      public Builder setTargetName(
          java.lang.String value) {
        if (value == null) {
    throw new NullPointerException();
  }
  
        targetName_ = value;
        onChanged();
        return this;
      }
      /**
       * <pre>
       * (Optional) If target name is provided, a secure naming check is performed
       * to verify that the peer authenticated identity is indeed authorized to run
       * the target name.
       * </pre>
       *
       * <code>string target_name = 8;</code>
       */
      public Builder clearTargetName() {
        
        targetName_ = getDefaultInstance().getTargetName();
        onChanged();
        return this;
      }
      /**
       * <pre>
       * (Optional) If target name is provided, a secure naming check is performed
       * to verify that the peer authenticated identity is indeed authorized to run
       * the target name.
       * </pre>
       *
       * <code>string target_name = 8;</code>
       */
      public Builder setTargetNameBytes(
          com.google.protobuf.ByteString value) {
        if (value == null) {
    throw new NullPointerException();
  }
  checkByteStringIsUtf8(value);
        
        targetName_ = value;
        onChanged();
        return this;
      }

      private io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions rpcVersions_ = null;
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions, io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.Builder, io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersionsOrBuilder> rpcVersionsBuilder_;
      /**
       * <pre>
       * (Optional) RPC protocol versions supported by the client.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 9;</code>
       */
      public boolean hasRpcVersions() {
        return rpcVersionsBuilder_ != null || rpcVersions_ != null;
      }
      /**
       * <pre>
       * (Optional) RPC protocol versions supported by the client.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 9;</code>
       */
      public io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions getRpcVersions() {
        if (rpcVersionsBuilder_ == null) {
          return rpcVersions_ == null ? io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.getDefaultInstance() : rpcVersions_;
        } else {
          return rpcVersionsBuilder_.getMessage();
        }
      }
      /**
       * <pre>
       * (Optional) RPC protocol versions supported by the client.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 9;</code>
       */
      public Builder setRpcVersions(io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions value) {
        if (rpcVersionsBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          rpcVersions_ = value;
          onChanged();
        } else {
          rpcVersionsBuilder_.setMessage(value);
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) RPC protocol versions supported by the client.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 9;</code>
       */
      public Builder setRpcVersions(
          io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.Builder builderForValue) {
        if (rpcVersionsBuilder_ == null) {
          rpcVersions_ = builderForValue.build();
          onChanged();
        } else {
          rpcVersionsBuilder_.setMessage(builderForValue.build());
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) RPC protocol versions supported by the client.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 9;</code>
       */
      public Builder mergeRpcVersions(io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions value) {
        if (rpcVersionsBuilder_ == null) {
          if (rpcVersions_ != null) {
            rpcVersions_ =
              io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.newBuilder(rpcVersions_).mergeFrom(value).buildPartial();
          } else {
            rpcVersions_ = value;
          }
          onChanged();
        } else {
          rpcVersionsBuilder_.mergeFrom(value);
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) RPC protocol versions supported by the client.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 9;</code>
       */
      public Builder clearRpcVersions() {
        if (rpcVersionsBuilder_ == null) {
          rpcVersions_ = null;
          onChanged();
        } else {
          rpcVersions_ = null;
          rpcVersionsBuilder_ = null;
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) RPC protocol versions supported by the client.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 9;</code>
       */
      public io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.Builder getRpcVersionsBuilder() {
        
        onChanged();
        return getRpcVersionsFieldBuilder().getBuilder();
      }
      /**
       * <pre>
       * (Optional) RPC protocol versions supported by the client.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 9;</code>
       */
      public io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersionsOrBuilder getRpcVersionsOrBuilder() {
        if (rpcVersionsBuilder_ != null) {
          return rpcVersionsBuilder_.getMessageOrBuilder();
        } else {
          return rpcVersions_ == null ?
              io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.getDefaultInstance() : rpcVersions_;
        }
      }
      /**
       * <pre>
       * (Optional) RPC protocol versions supported by the client.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 9;</code>
       */
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions, io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.Builder, io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersionsOrBuilder> 
          getRpcVersionsFieldBuilder() {
        if (rpcVersionsBuilder_ == null) {
          rpcVersionsBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
              io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions, io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.Builder, io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersionsOrBuilder>(
                  getRpcVersions(),
                  getParentForChildren(),
                  isClean());
          rpcVersions_ = null;
        }
        return rpcVersionsBuilder_;
      }
      public final Builder setUnknownFields(
          final com.google.protobuf.UnknownFieldSet unknownFields) {
        return super.setUnknownFieldsProto3(unknownFields);
      }

      public final Builder mergeUnknownFields(
          final com.google.protobuf.UnknownFieldSet unknownFields) {
        return super.mergeUnknownFields(unknownFields);
      }


      // @@protoc_insertion_point(builder_scope:grpc.gcp.StartClientHandshakeReq)
    }

    // @@protoc_insertion_point(class_scope:grpc.gcp.StartClientHandshakeReq)
    private static final io.grpc.alts.internal.Handshaker.StartClientHandshakeReq DEFAULT_INSTANCE;
    static {
      DEFAULT_INSTANCE = new io.grpc.alts.internal.Handshaker.StartClientHandshakeReq();
    }

    public static io.grpc.alts.internal.Handshaker.StartClientHandshakeReq getDefaultInstance() {
      return DEFAULT_INSTANCE;
    }

    private static final com.google.protobuf.Parser<StartClientHandshakeReq>
        PARSER = new com.google.protobuf.AbstractParser<StartClientHandshakeReq>() {
      public StartClientHandshakeReq parsePartialFrom(
          com.google.protobuf.CodedInputStream input,
          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
          throws com.google.protobuf.InvalidProtocolBufferException {
        return new StartClientHandshakeReq(input, extensionRegistry);
      }
    };

    public static com.google.protobuf.Parser<StartClientHandshakeReq> parser() {
      return PARSER;
    }

    @java.lang.Override
    public com.google.protobuf.Parser<StartClientHandshakeReq> getParserForType() {
      return PARSER;
    }

    public io.grpc.alts.internal.Handshaker.StartClientHandshakeReq getDefaultInstanceForType() {
      return DEFAULT_INSTANCE;
    }

  }

  public interface ServerHandshakeParametersOrBuilder extends
      // @@protoc_insertion_point(interface_extends:grpc.gcp.ServerHandshakeParameters)
      com.google.protobuf.MessageOrBuilder {

    /**
     * <pre>
     * The record protocols supported by the server, e.g.,
     * "ALTSRP_GCM_AES128".
     * </pre>
     *
     * <code>repeated string record_protocols = 1;</code>
     */
    java.util.List<java.lang.String>
        getRecordProtocolsList();
    /**
     * <pre>
     * The record protocols supported by the server, e.g.,
     * "ALTSRP_GCM_AES128".
     * </pre>
     *
     * <code>repeated string record_protocols = 1;</code>
     */
    int getRecordProtocolsCount();
    /**
     * <pre>
     * The record protocols supported by the server, e.g.,
     * "ALTSRP_GCM_AES128".
     * </pre>
     *
     * <code>repeated string record_protocols = 1;</code>
     */
    java.lang.String getRecordProtocols(int index);
    /**
     * <pre>
     * The record protocols supported by the server, e.g.,
     * "ALTSRP_GCM_AES128".
     * </pre>
     *
     * <code>repeated string record_protocols = 1;</code>
     */
    com.google.protobuf.ByteString
        getRecordProtocolsBytes(int index);

    /**
     * <pre>
     * (Optional) A list of local identities supported by the server, if
     * specified. Otherwise, the handshaker chooses a default local identity.
     * </pre>
     *
     * <code>repeated .grpc.gcp.Identity local_identities = 2;</code>
     */
    java.util.List<io.grpc.alts.internal.Handshaker.Identity> 
        getLocalIdentitiesList();
    /**
     * <pre>
     * (Optional) A list of local identities supported by the server, if
     * specified. Otherwise, the handshaker chooses a default local identity.
     * </pre>
     *
     * <code>repeated .grpc.gcp.Identity local_identities = 2;</code>
     */
    io.grpc.alts.internal.Handshaker.Identity getLocalIdentities(int index);
    /**
     * <pre>
     * (Optional) A list of local identities supported by the server, if
     * specified. Otherwise, the handshaker chooses a default local identity.
     * </pre>
     *
     * <code>repeated .grpc.gcp.Identity local_identities = 2;</code>
     */
    int getLocalIdentitiesCount();
    /**
     * <pre>
     * (Optional) A list of local identities supported by the server, if
     * specified. Otherwise, the handshaker chooses a default local identity.
     * </pre>
     *
     * <code>repeated .grpc.gcp.Identity local_identities = 2;</code>
     */
    java.util.List<? extends io.grpc.alts.internal.Handshaker.IdentityOrBuilder> 
        getLocalIdentitiesOrBuilderList();
    /**
     * <pre>
     * (Optional) A list of local identities supported by the server, if
     * specified. Otherwise, the handshaker chooses a default local identity.
     * </pre>
     *
     * <code>repeated .grpc.gcp.Identity local_identities = 2;</code>
     */
    io.grpc.alts.internal.Handshaker.IdentityOrBuilder getLocalIdentitiesOrBuilder(
        int index);
  }
  /**
   * Protobuf type {@code grpc.gcp.ServerHandshakeParameters}
   */
  public  static final class ServerHandshakeParameters extends
      com.google.protobuf.GeneratedMessageV3 implements
      // @@protoc_insertion_point(message_implements:grpc.gcp.ServerHandshakeParameters)
      ServerHandshakeParametersOrBuilder {
  private static final long serialVersionUID = 0L;
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    private ServerHandshakeParameters(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
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    private ServerHandshakeParameters() {
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    }

    @java.lang.Override
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      return this.unknownFields;
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    private ServerHandshakeParameters(
        com.google.protobuf.CodedInputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
      this();
      if (extensionRegistry == null) {
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                  input, unknownFields, extensionRegistry, tag)) {
                done = true;
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                  input.readMessage(io.grpc.alts.internal.Handshaker.Identity.parser(), extensionRegistry));
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        throw e.setUnfinishedMessage(this);
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    public static final com.google.protobuf.Descriptors.Descriptor
        getDescriptor() {
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    public static final int RECORD_PROTOCOLS_FIELD_NUMBER = 1;
    private com.google.protobuf.LazyStringList recordProtocols_;
    /**
     * <pre>
     * The record protocols supported by the server, e.g.,
     * "ALTSRP_GCM_AES128".
     * </pre>
     *
     * <code>repeated string record_protocols = 1;</code>
     */
    public com.google.protobuf.ProtocolStringList
        getRecordProtocolsList() {
      return recordProtocols_;
    }
    /**
     * <pre>
     * The record protocols supported by the server, e.g.,
     * "ALTSRP_GCM_AES128".
     * </pre>
     *
     * <code>repeated string record_protocols = 1;</code>
     */
    public int getRecordProtocolsCount() {
      return recordProtocols_.size();
    }
    /**
     * <pre>
     * The record protocols supported by the server, e.g.,
     * "ALTSRP_GCM_AES128".
     * </pre>
     *
     * <code>repeated string record_protocols = 1;</code>
     */
    public java.lang.String getRecordProtocols(int index) {
      return recordProtocols_.get(index);
    }
    /**
     * <pre>
     * The record protocols supported by the server, e.g.,
     * "ALTSRP_GCM_AES128".
     * </pre>
     *
     * <code>repeated string record_protocols = 1;</code>
     */
    public com.google.protobuf.ByteString
        getRecordProtocolsBytes(int index) {
      return recordProtocols_.getByteString(index);
    }

    public static final int LOCAL_IDENTITIES_FIELD_NUMBER = 2;
    private java.util.List<io.grpc.alts.internal.Handshaker.Identity> localIdentities_;
    /**
     * <pre>
     * (Optional) A list of local identities supported by the server, if
     * specified. Otherwise, the handshaker chooses a default local identity.
     * </pre>
     *
     * <code>repeated .grpc.gcp.Identity local_identities = 2;</code>
     */
    public java.util.List<io.grpc.alts.internal.Handshaker.Identity> getLocalIdentitiesList() {
      return localIdentities_;
    }
    /**
     * <pre>
     * (Optional) A list of local identities supported by the server, if
     * specified. Otherwise, the handshaker chooses a default local identity.
     * </pre>
     *
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       * (Optional) A list of local identities supported by the server, if
       * specified. Otherwise, the handshaker chooses a default local identity.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity local_identities = 2;</code>
       */
      public Builder addAllLocalIdentities(
          java.lang.Iterable<? extends io.grpc.alts.internal.Handshaker.Identity> values) {
        if (localIdentitiesBuilder_ == null) {
          ensureLocalIdentitiesIsMutable();
          com.google.protobuf.AbstractMessageLite.Builder.addAll(
              values, localIdentities_);
          onChanged();
        } else {
          localIdentitiesBuilder_.addAllMessages(values);
        }
        return this;
      }
      /**
       * <pre>
       * (Optional) A list of local identities supported by the server, if
       * specified. Otherwise, the handshaker chooses a default local identity.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity local_identities = 2;</code>
       */
      public Builder clearLocalIdentities() {
        if (localIdentitiesBuilder_ == null) {
          localIdentities_ = java.util.Collections.emptyList();
          bitField0_ = (bitField0_ & ~0x00000002);
          onChanged();
        } else {
          localIdentitiesBuilder_.clear();
        }
        return this;
      }
      /**
       * <pre>
       * (Optional) A list of local identities supported by the server, if
       * specified. Otherwise, the handshaker chooses a default local identity.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity local_identities = 2;</code>
       */
      public Builder removeLocalIdentities(int index) {
        if (localIdentitiesBuilder_ == null) {
          ensureLocalIdentitiesIsMutable();
          localIdentities_.remove(index);
          onChanged();
        } else {
          localIdentitiesBuilder_.remove(index);
        }
        return this;
      }
      /**
       * <pre>
       * (Optional) A list of local identities supported by the server, if
       * specified. Otherwise, the handshaker chooses a default local identity.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity local_identities = 2;</code>
       */
      public io.grpc.alts.internal.Handshaker.Identity.Builder getLocalIdentitiesBuilder(
          int index) {
        return getLocalIdentitiesFieldBuilder().getBuilder(index);
      }
      /**
       * <pre>
       * (Optional) A list of local identities supported by the server, if
       * specified. Otherwise, the handshaker chooses a default local identity.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity local_identities = 2;</code>
       */
      public io.grpc.alts.internal.Handshaker.IdentityOrBuilder getLocalIdentitiesOrBuilder(
          int index) {
        if (localIdentitiesBuilder_ == null) {
          return localIdentities_.get(index);  } else {
          return localIdentitiesBuilder_.getMessageOrBuilder(index);
        }
      }
      /**
       * <pre>
       * (Optional) A list of local identities supported by the server, if
       * specified. Otherwise, the handshaker chooses a default local identity.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity local_identities = 2;</code>
       */
      public java.util.List<? extends io.grpc.alts.internal.Handshaker.IdentityOrBuilder> 
           getLocalIdentitiesOrBuilderList() {
        if (localIdentitiesBuilder_ != null) {
          return localIdentitiesBuilder_.getMessageOrBuilderList();
        } else {
          return java.util.Collections.unmodifiableList(localIdentities_);
        }
      }
      /**
       * <pre>
       * (Optional) A list of local identities supported by the server, if
       * specified. Otherwise, the handshaker chooses a default local identity.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity local_identities = 2;</code>
       */
      public io.grpc.alts.internal.Handshaker.Identity.Builder addLocalIdentitiesBuilder() {
        return getLocalIdentitiesFieldBuilder().addBuilder(
            io.grpc.alts.internal.Handshaker.Identity.getDefaultInstance());
      }
      /**
       * <pre>
       * (Optional) A list of local identities supported by the server, if
       * specified. Otherwise, the handshaker chooses a default local identity.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity local_identities = 2;</code>
       */
      public io.grpc.alts.internal.Handshaker.Identity.Builder addLocalIdentitiesBuilder(
          int index) {
        return getLocalIdentitiesFieldBuilder().addBuilder(
            index, io.grpc.alts.internal.Handshaker.Identity.getDefaultInstance());
      }
      /**
       * <pre>
       * (Optional) A list of local identities supported by the server, if
       * specified. Otherwise, the handshaker chooses a default local identity.
       * </pre>
       *
       * <code>repeated .grpc.gcp.Identity local_identities = 2;</code>
       */
      public java.util.List<io.grpc.alts.internal.Handshaker.Identity.Builder> 
           getLocalIdentitiesBuilderList() {
        return getLocalIdentitiesFieldBuilder().getBuilderList();
      }
      private com.google.protobuf.RepeatedFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.Identity, io.grpc.alts.internal.Handshaker.Identity.Builder, io.grpc.alts.internal.Handshaker.IdentityOrBuilder> 
          getLocalIdentitiesFieldBuilder() {
        if (localIdentitiesBuilder_ == null) {
          localIdentitiesBuilder_ = new com.google.protobuf.RepeatedFieldBuilderV3<
              io.grpc.alts.internal.Handshaker.Identity, io.grpc.alts.internal.Handshaker.Identity.Builder, io.grpc.alts.internal.Handshaker.IdentityOrBuilder>(
                  localIdentities_,
                  ((bitField0_ & 0x00000002) == 0x00000002),
                  getParentForChildren(),
                  isClean());
          localIdentities_ = null;
        }
        return localIdentitiesBuilder_;
      }
      public final Builder setUnknownFields(
          final com.google.protobuf.UnknownFieldSet unknownFields) {
        return super.setUnknownFieldsProto3(unknownFields);
      }

      public final Builder mergeUnknownFields(
          final com.google.protobuf.UnknownFieldSet unknownFields) {
        return super.mergeUnknownFields(unknownFields);
      }


      // @@protoc_insertion_point(builder_scope:grpc.gcp.ServerHandshakeParameters)
    }

    // @@protoc_insertion_point(class_scope:grpc.gcp.ServerHandshakeParameters)
    private static final io.grpc.alts.internal.Handshaker.ServerHandshakeParameters DEFAULT_INSTANCE;
    static {
      DEFAULT_INSTANCE = new io.grpc.alts.internal.Handshaker.ServerHandshakeParameters();
    }

    public static io.grpc.alts.internal.Handshaker.ServerHandshakeParameters getDefaultInstance() {
      return DEFAULT_INSTANCE;
    }

    private static final com.google.protobuf.Parser<ServerHandshakeParameters>
        PARSER = new com.google.protobuf.AbstractParser<ServerHandshakeParameters>() {
      public ServerHandshakeParameters parsePartialFrom(
          com.google.protobuf.CodedInputStream input,
          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
          throws com.google.protobuf.InvalidProtocolBufferException {
        return new ServerHandshakeParameters(input, extensionRegistry);
      }
    };

    public static com.google.protobuf.Parser<ServerHandshakeParameters> parser() {
      return PARSER;
    }

    @java.lang.Override
    public com.google.protobuf.Parser<ServerHandshakeParameters> getParserForType() {
      return PARSER;
    }

    public io.grpc.alts.internal.Handshaker.ServerHandshakeParameters getDefaultInstanceForType() {
      return DEFAULT_INSTANCE;
    }

  }

  public interface StartServerHandshakeReqOrBuilder extends
      // @@protoc_insertion_point(interface_extends:grpc.gcp.StartServerHandshakeReq)
      com.google.protobuf.MessageOrBuilder {

    /**
     * <pre>
     * The application protocols supported by the server, e.g., "h2" (for http2),
     * "grpc".
     * </pre>
     *
     * <code>repeated string application_protocols = 1;</code>
     */
    java.util.List<java.lang.String>
        getApplicationProtocolsList();
    /**
     * <pre>
     * The application protocols supported by the server, e.g., "h2" (for http2),
     * "grpc".
     * </pre>
     *
     * <code>repeated string application_protocols = 1;</code>
     */
    int getApplicationProtocolsCount();
    /**
     * <pre>
     * The application protocols supported by the server, e.g., "h2" (for http2),
     * "grpc".
     * </pre>
     *
     * <code>repeated string application_protocols = 1;</code>
     */
    java.lang.String getApplicationProtocols(int index);
    /**
     * <pre>
     * The application protocols supported by the server, e.g., "h2" (for http2),
     * "grpc".
     * </pre>
     *
     * <code>repeated string application_protocols = 1;</code>
     */
    com.google.protobuf.ByteString
        getApplicationProtocolsBytes(int index);

    /**
     * <pre>
     * Handshake parameters (record protocols and local identities supported by
     * the server) mapped by the handshake protocol. Each handshake security
     * protocol (e.g., TLS or ALTS) has its own set of record protocols and local
     * identities. Since protobuf does not support enum as key to the map, the key
     * to handshake_parameters is the integer value of HandshakeProtocol enum.
     * </pre>
     *
     * <code>map&lt;int32, .grpc.gcp.ServerHandshakeParameters&gt; handshake_parameters = 2;</code>
     */
    int getHandshakeParametersCount();
    /**
     * <pre>
     * Handshake parameters (record protocols and local identities supported by
     * the server) mapped by the handshake protocol. Each handshake security
     * protocol (e.g., TLS or ALTS) has its own set of record protocols and local
     * identities. Since protobuf does not support enum as key to the map, the key
     * to handshake_parameters is the integer value of HandshakeProtocol enum.
     * </pre>
     *
     * <code>map&lt;int32, .grpc.gcp.ServerHandshakeParameters&gt; handshake_parameters = 2;</code>
     */
    boolean containsHandshakeParameters(
        int key);
    /**
     * Use {@link #getHandshakeParametersMap()} instead.
     */
    @java.lang.Deprecated
    java.util.Map<java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters>
    getHandshakeParameters();
    /**
     * <pre>
     * Handshake parameters (record protocols and local identities supported by
     * the server) mapped by the handshake protocol. Each handshake security
     * protocol (e.g., TLS or ALTS) has its own set of record protocols and local
     * identities. Since protobuf does not support enum as key to the map, the key
     * to handshake_parameters is the integer value of HandshakeProtocol enum.
     * </pre>
     *
     * <code>map&lt;int32, .grpc.gcp.ServerHandshakeParameters&gt; handshake_parameters = 2;</code>
     */
    java.util.Map<java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters>
    getHandshakeParametersMap();
    /**
     * <pre>
     * Handshake parameters (record protocols and local identities supported by
     * the server) mapped by the handshake protocol. Each handshake security
     * protocol (e.g., TLS or ALTS) has its own set of record protocols and local
     * identities. Since protobuf does not support enum as key to the map, the key
     * to handshake_parameters is the integer value of HandshakeProtocol enum.
     * </pre>
     *
     * <code>map&lt;int32, .grpc.gcp.ServerHandshakeParameters&gt; handshake_parameters = 2;</code>
     */

    io.grpc.alts.internal.Handshaker.ServerHandshakeParameters getHandshakeParametersOrDefault(
        int key,
        io.grpc.alts.internal.Handshaker.ServerHandshakeParameters defaultValue);
    /**
     * <pre>
     * Handshake parameters (record protocols and local identities supported by
     * the server) mapped by the handshake protocol. Each handshake security
     * protocol (e.g., TLS or ALTS) has its own set of record protocols and local
     * identities. Since protobuf does not support enum as key to the map, the key
     * to handshake_parameters is the integer value of HandshakeProtocol enum.
     * </pre>
     *
     * <code>map&lt;int32, .grpc.gcp.ServerHandshakeParameters&gt; handshake_parameters = 2;</code>
     */

    io.grpc.alts.internal.Handshaker.ServerHandshakeParameters getHandshakeParametersOrThrow(
        int key);

    /**
     * <pre>
     * Bytes in out_frames returned from the peer's HandshakerResp. It is possible
     * that the peer's out_frames are split into multiple HandshakReq messages.
     * </pre>
     *
     * <code>bytes in_bytes = 3;</code>
     */
    com.google.protobuf.ByteString getInBytes();

    /**
     * <pre>
     * (Optional) Local endpoint information of the connection to the client,
     * such as local IP address, port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint local_endpoint = 4;</code>
     */
    boolean hasLocalEndpoint();
    /**
     * <pre>
     * (Optional) Local endpoint information of the connection to the client,
     * such as local IP address, port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint local_endpoint = 4;</code>
     */
    io.grpc.alts.internal.Handshaker.Endpoint getLocalEndpoint();
    /**
     * <pre>
     * (Optional) Local endpoint information of the connection to the client,
     * such as local IP address, port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint local_endpoint = 4;</code>
     */
    io.grpc.alts.internal.Handshaker.EndpointOrBuilder getLocalEndpointOrBuilder();

    /**
     * <pre>
     * (Optional) Endpoint information of the remote client, such as IP address,
     * port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint remote_endpoint = 5;</code>
     */
    boolean hasRemoteEndpoint();
    /**
     * <pre>
     * (Optional) Endpoint information of the remote client, such as IP address,
     * port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint remote_endpoint = 5;</code>
     */
    io.grpc.alts.internal.Handshaker.Endpoint getRemoteEndpoint();
    /**
     * <pre>
     * (Optional) Endpoint information of the remote client, such as IP address,
     * port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint remote_endpoint = 5;</code>
     */
    io.grpc.alts.internal.Handshaker.EndpointOrBuilder getRemoteEndpointOrBuilder();

    /**
     * <pre>
     * (Optional) RPC protocol versions supported by the server.
     * </pre>
     *
     * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 6;</code>
     */
    boolean hasRpcVersions();
    /**
     * <pre>
     * (Optional) RPC protocol versions supported by the server.
     * </pre>
     *
     * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 6;</code>
     */
    io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions getRpcVersions();
    /**
     * <pre>
     * (Optional) RPC protocol versions supported by the server.
     * </pre>
     *
     * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 6;</code>
     */
    io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersionsOrBuilder getRpcVersionsOrBuilder();
  }
  /**
   * Protobuf type {@code grpc.gcp.StartServerHandshakeReq}
   */
  public  static final class StartServerHandshakeReq extends
      com.google.protobuf.GeneratedMessageV3 implements
      // @@protoc_insertion_point(message_implements:grpc.gcp.StartServerHandshakeReq)
      StartServerHandshakeReqOrBuilder {
  private static final long serialVersionUID = 0L;
    // Use StartServerHandshakeReq.newBuilder() to construct.
    private StartServerHandshakeReq(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
      super(builder);
    }
    private StartServerHandshakeReq() {
      applicationProtocols_ = com.google.protobuf.LazyStringArrayList.EMPTY;
      inBytes_ = com.google.protobuf.ByteString.EMPTY;
    }

    @java.lang.Override
    public final com.google.protobuf.UnknownFieldSet
    getUnknownFields() {
      return this.unknownFields;
    }
    private StartServerHandshakeReq(
        com.google.protobuf.CodedInputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
      this();
      if (extensionRegistry == null) {
        throw new java.lang.NullPointerException();
      }
      int mutable_bitField0_ = 0;
      com.google.protobuf.UnknownFieldSet.Builder unknownFields =
          com.google.protobuf.UnknownFieldSet.newBuilder();
      try {
        boolean done = false;
        while (!done) {
          int tag = input.readTag();
          switch (tag) {
            case 0:
              done = true;
              break;
            default: {
              if (!parseUnknownFieldProto3(
                  input, unknownFields, extensionRegistry, tag)) {
                done = true;
              }
              break;
            }
            case 10: {
              java.lang.String s = input.readStringRequireUtf8();
              if (!((mutable_bitField0_ & 0x00000001) == 0x00000001)) {
                applicationProtocols_ = new com.google.protobuf.LazyStringArrayList();
                mutable_bitField0_ |= 0x00000001;
              }
              applicationProtocols_.add(s);
              break;
            }
            case 18: {
              if (!((mutable_bitField0_ & 0x00000002) == 0x00000002)) {
                handshakeParameters_ = com.google.protobuf.MapField.newMapField(
                    HandshakeParametersDefaultEntryHolder.defaultEntry);
                mutable_bitField0_ |= 0x00000002;
              }
              com.google.protobuf.MapEntry<java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters>
              handshakeParameters__ = input.readMessage(
                  HandshakeParametersDefaultEntryHolder.defaultEntry.getParserForType(), extensionRegistry);
              handshakeParameters_.getMutableMap().put(
                  handshakeParameters__.getKey(), handshakeParameters__.getValue());
              break;
            }
            case 26: {

              inBytes_ = input.readBytes();
              break;
            }
            case 34: {
              io.grpc.alts.internal.Handshaker.Endpoint.Builder subBuilder = null;
              if (localEndpoint_ != null) {
                subBuilder = localEndpoint_.toBuilder();
              }
              localEndpoint_ = input.readMessage(io.grpc.alts.internal.Handshaker.Endpoint.parser(), extensionRegistry);
              if (subBuilder != null) {
                subBuilder.mergeFrom(localEndpoint_);
                localEndpoint_ = subBuilder.buildPartial();
              }

              break;
            }
            case 42: {
              io.grpc.alts.internal.Handshaker.Endpoint.Builder subBuilder = null;
              if (remoteEndpoint_ != null) {
                subBuilder = remoteEndpoint_.toBuilder();
              }
              remoteEndpoint_ = input.readMessage(io.grpc.alts.internal.Handshaker.Endpoint.parser(), extensionRegistry);
              if (subBuilder != null) {
                subBuilder.mergeFrom(remoteEndpoint_);
                remoteEndpoint_ = subBuilder.buildPartial();
              }

              break;
            }
            case 50: {
              io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.Builder subBuilder = null;
              if (rpcVersions_ != null) {
                subBuilder = rpcVersions_.toBuilder();
              }
              rpcVersions_ = input.readMessage(io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.parser(), extensionRegistry);
              if (subBuilder != null) {
                subBuilder.mergeFrom(rpcVersions_);
                rpcVersions_ = subBuilder.buildPartial();
              }

              break;
            }
          }
        }
      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
        throw e.setUnfinishedMessage(this);
      } catch (java.io.IOException e) {
        throw new com.google.protobuf.InvalidProtocolBufferException(
            e).setUnfinishedMessage(this);
      } finally {
        if (((mutable_bitField0_ & 0x00000001) == 0x00000001)) {
          applicationProtocols_ = applicationProtocols_.getUnmodifiableView();
        }
        this.unknownFields = unknownFields.build();
        makeExtensionsImmutable();
      }
    }
    public static final com.google.protobuf.Descriptors.Descriptor
        getDescriptor() {
      return io.grpc.alts.internal.Handshaker.internal_static_grpc_gcp_StartServerHandshakeReq_descriptor;
    }

    @SuppressWarnings({"rawtypes"})
    protected com.google.protobuf.MapField internalGetMapField(
        int number) {
      switch (number) {
        case 2:
          return internalGetHandshakeParameters();
        default:
          throw new RuntimeException(
              "Invalid map field number: " + number);
      }
    }
    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
        internalGetFieldAccessorTable() {
      return io.grpc.alts.internal.Handshaker.internal_static_grpc_gcp_StartServerHandshakeReq_fieldAccessorTable
          .ensureFieldAccessorsInitialized(
              io.grpc.alts.internal.Handshaker.StartServerHandshakeReq.class, io.grpc.alts.internal.Handshaker.StartServerHandshakeReq.Builder.class);
    }

    private int bitField0_;
    public static final int APPLICATION_PROTOCOLS_FIELD_NUMBER = 1;
    private com.google.protobuf.LazyStringList applicationProtocols_;
    /**
     * <pre>
     * The application protocols supported by the server, e.g., "h2" (for http2),
     * "grpc".
     * </pre>
     *
     * <code>repeated string application_protocols = 1;</code>
     */
    public com.google.protobuf.ProtocolStringList
        getApplicationProtocolsList() {
      return applicationProtocols_;
    }
    /**
     * <pre>
     * The application protocols supported by the server, e.g., "h2" (for http2),
     * "grpc".
     * </pre>
     *
     * <code>repeated string application_protocols = 1;</code>
     */
    public int getApplicationProtocolsCount() {
      return applicationProtocols_.size();
    }
    /**
     * <pre>
     * The application protocols supported by the server, e.g., "h2" (for http2),
     * "grpc".
     * </pre>
     *
     * <code>repeated string application_protocols = 1;</code>
     */
    public java.lang.String getApplicationProtocols(int index) {
      return applicationProtocols_.get(index);
    }
    /**
     * <pre>
     * The application protocols supported by the server, e.g., "h2" (for http2),
     * "grpc".
     * </pre>
     *
     * <code>repeated string application_protocols = 1;</code>
     */
    public com.google.protobuf.ByteString
        getApplicationProtocolsBytes(int index) {
      return applicationProtocols_.getByteString(index);
    }

    public static final int HANDSHAKE_PARAMETERS_FIELD_NUMBER = 2;
    private static final class HandshakeParametersDefaultEntryHolder {
      static final com.google.protobuf.MapEntry<
          java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters> defaultEntry =
              com.google.protobuf.MapEntry
              .<java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters>newDefaultInstance(
                  io.grpc.alts.internal.Handshaker.internal_static_grpc_gcp_StartServerHandshakeReq_HandshakeParametersEntry_descriptor, 
                  com.google.protobuf.WireFormat.FieldType.INT32,
                  0,
                  com.google.protobuf.WireFormat.FieldType.MESSAGE,
                  io.grpc.alts.internal.Handshaker.ServerHandshakeParameters.getDefaultInstance());
    }
    private com.google.protobuf.MapField<
        java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters> handshakeParameters_;
    private com.google.protobuf.MapField<java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters>
    internalGetHandshakeParameters() {
      if (handshakeParameters_ == null) {
        return com.google.protobuf.MapField.emptyMapField(
            HandshakeParametersDefaultEntryHolder.defaultEntry);
      }
      return handshakeParameters_;
    }

    public int getHandshakeParametersCount() {
      return internalGetHandshakeParameters().getMap().size();
    }
    /**
     * <pre>
     * Handshake parameters (record protocols and local identities supported by
     * the server) mapped by the handshake protocol. Each handshake security
     * protocol (e.g., TLS or ALTS) has its own set of record protocols and local
     * identities. Since protobuf does not support enum as key to the map, the key
     * to handshake_parameters is the integer value of HandshakeProtocol enum.
     * </pre>
     *
     * <code>map&lt;int32, .grpc.gcp.ServerHandshakeParameters&gt; handshake_parameters = 2;</code>
     */

    public boolean containsHandshakeParameters(
        int key) {
      
      return internalGetHandshakeParameters().getMap().containsKey(key);
    }
    /**
     * Use {@link #getHandshakeParametersMap()} instead.
     */
    @java.lang.Deprecated
    public java.util.Map<java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters> getHandshakeParameters() {
      return getHandshakeParametersMap();
    }
    /**
     * <pre>
     * Handshake parameters (record protocols and local identities supported by
     * the server) mapped by the handshake protocol. Each handshake security
     * protocol (e.g., TLS or ALTS) has its own set of record protocols and local
     * identities. Since protobuf does not support enum as key to the map, the key
     * to handshake_parameters is the integer value of HandshakeProtocol enum.
     * </pre>
     *
     * <code>map&lt;int32, .grpc.gcp.ServerHandshakeParameters&gt; handshake_parameters = 2;</code>
     */

    public java.util.Map<java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters> getHandshakeParametersMap() {
      return internalGetHandshakeParameters().getMap();
    }
    /**
     * <pre>
     * Handshake parameters (record protocols and local identities supported by
     * the server) mapped by the handshake protocol. Each handshake security
     * protocol (e.g., TLS or ALTS) has its own set of record protocols and local
     * identities. Since protobuf does not support enum as key to the map, the key
     * to handshake_parameters is the integer value of HandshakeProtocol enum.
     * </pre>
     *
     * <code>map&lt;int32, .grpc.gcp.ServerHandshakeParameters&gt; handshake_parameters = 2;</code>
     */

    public io.grpc.alts.internal.Handshaker.ServerHandshakeParameters getHandshakeParametersOrDefault(
        int key,
        io.grpc.alts.internal.Handshaker.ServerHandshakeParameters defaultValue) {
      
      java.util.Map<java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters> map =
          internalGetHandshakeParameters().getMap();
      return map.containsKey(key) ? map.get(key) : defaultValue;
    }
    /**
     * <pre>
     * Handshake parameters (record protocols and local identities supported by
     * the server) mapped by the handshake protocol. Each handshake security
     * protocol (e.g., TLS or ALTS) has its own set of record protocols and local
     * identities. Since protobuf does not support enum as key to the map, the key
     * to handshake_parameters is the integer value of HandshakeProtocol enum.
     * </pre>
     *
     * <code>map&lt;int32, .grpc.gcp.ServerHandshakeParameters&gt; handshake_parameters = 2;</code>
     */

    public io.grpc.alts.internal.Handshaker.ServerHandshakeParameters getHandshakeParametersOrThrow(
        int key) {
      
      java.util.Map<java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters> map =
          internalGetHandshakeParameters().getMap();
      if (!map.containsKey(key)) {
        throw new java.lang.IllegalArgumentException();
      }
      return map.get(key);
    }

    public static final int IN_BYTES_FIELD_NUMBER = 3;
    private com.google.protobuf.ByteString inBytes_;
    /**
     * <pre>
     * Bytes in out_frames returned from the peer's HandshakerResp. It is possible
     * that the peer's out_frames are split into multiple HandshakReq messages.
     * </pre>
     *
     * <code>bytes in_bytes = 3;</code>
     */
    public com.google.protobuf.ByteString getInBytes() {
      return inBytes_;
    }

    public static final int LOCAL_ENDPOINT_FIELD_NUMBER = 4;
    private io.grpc.alts.internal.Handshaker.Endpoint localEndpoint_;
    /**
     * <pre>
     * (Optional) Local endpoint information of the connection to the client,
     * such as local IP address, port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint local_endpoint = 4;</code>
     */
    public boolean hasLocalEndpoint() {
      return localEndpoint_ != null;
    }
    /**
     * <pre>
     * (Optional) Local endpoint information of the connection to the client,
     * such as local IP address, port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint local_endpoint = 4;</code>
     */
    public io.grpc.alts.internal.Handshaker.Endpoint getLocalEndpoint() {
      return localEndpoint_ == null ? io.grpc.alts.internal.Handshaker.Endpoint.getDefaultInstance() : localEndpoint_;
    }
    /**
     * <pre>
     * (Optional) Local endpoint information of the connection to the client,
     * such as local IP address, port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint local_endpoint = 4;</code>
     */
    public io.grpc.alts.internal.Handshaker.EndpointOrBuilder getLocalEndpointOrBuilder() {
      return getLocalEndpoint();
    }

    public static final int REMOTE_ENDPOINT_FIELD_NUMBER = 5;
    private io.grpc.alts.internal.Handshaker.Endpoint remoteEndpoint_;
    /**
     * <pre>
     * (Optional) Endpoint information of the remote client, such as IP address,
     * port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint remote_endpoint = 5;</code>
     */
    public boolean hasRemoteEndpoint() {
      return remoteEndpoint_ != null;
    }
    /**
     * <pre>
     * (Optional) Endpoint information of the remote client, such as IP address,
     * port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint remote_endpoint = 5;</code>
     */
    public io.grpc.alts.internal.Handshaker.Endpoint getRemoteEndpoint() {
      return remoteEndpoint_ == null ? io.grpc.alts.internal.Handshaker.Endpoint.getDefaultInstance() : remoteEndpoint_;
    }
    /**
     * <pre>
     * (Optional) Endpoint information of the remote client, such as IP address,
     * port number, and network protocol.
     * </pre>
     *
     * <code>.grpc.gcp.Endpoint remote_endpoint = 5;</code>
     */
    public io.grpc.alts.internal.Handshaker.EndpointOrBuilder getRemoteEndpointOrBuilder() {
      return getRemoteEndpoint();
    }

    public static final int RPC_VERSIONS_FIELD_NUMBER = 6;
    private io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions rpcVersions_;
    /**
     * <pre>
     * (Optional) RPC protocol versions supported by the server.
     * </pre>
     *
     * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 6;</code>
     */
    public boolean hasRpcVersions() {
      return rpcVersions_ != null;
    }
    /**
     * <pre>
     * (Optional) RPC protocol versions supported by the server.
     * </pre>
     *
     * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 6;</code>
     */
    public io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions getRpcVersions() {
      return rpcVersions_ == null ? io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.getDefaultInstance() : rpcVersions_;
    }
    /**
     * <pre>
     * (Optional) RPC protocol versions supported by the server.
     * </pre>
     *
     * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 6;</code>
     */
    public io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersionsOrBuilder getRpcVersionsOrBuilder() {
      return getRpcVersions();
    }

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      if (isInitialized == 0) return false;

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        output.writeBytes(3, inBytes_);
      }
      if (localEndpoint_ != null) {
        output.writeMessage(4, getLocalEndpoint());
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      }
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        output.writeMessage(6, getRpcVersions());
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      if (size != -1) return size;

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        int dataSize = 0;
        for (int i = 0; i < applicationProtocols_.size(); i++) {
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        size += dataSize;
        size += 1 * getApplicationProtocolsList().size();
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            .setValue(entry.getValue())
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      }
      if (!inBytes_.isEmpty()) {
        size += com.google.protobuf.CodedOutputStream
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      if (obj == this) {
       return true;
      }
      if (!(obj instanceof io.grpc.alts.internal.Handshaker.StartServerHandshakeReq)) {
        return super.equals(obj);
      }
      io.grpc.alts.internal.Handshaker.StartServerHandshakeReq other = (io.grpc.alts.internal.Handshaker.StartServerHandshakeReq) obj;

      boolean result = true;
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          .equals(other.getApplicationProtocolsList());
      result = result && internalGetHandshakeParameters().equals(
          other.internalGetHandshakeParameters());
      result = result && getInBytes()
          .equals(other.getInBytes());
      result = result && (hasLocalEndpoint() == other.hasLocalEndpoint());
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      }
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    public int hashCode() {
      if (memoizedHashCode != 0) {
        return memoizedHashCode;
      }
      int hash = 41;
      hash = (19 * hash) + getDescriptor().hashCode();
      if (getApplicationProtocolsCount() > 0) {
        hash = (37 * hash) + APPLICATION_PROTOCOLS_FIELD_NUMBER;
        hash = (53 * hash) + getApplicationProtocolsList().hashCode();
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      if (hasRpcVersions()) {
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        hash = (53 * hash) + getRpcVersions().hashCode();
      }
      hash = (29 * hash) + unknownFields.hashCode();
      memoizedHashCode = hash;
      return hash;
    }

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    public static io.grpc.alts.internal.Handshaker.StartServerHandshakeReq parseFrom(
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    public static io.grpc.alts.internal.Handshaker.StartServerHandshakeReq parseFrom(
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    public static io.grpc.alts.internal.Handshaker.StartServerHandshakeReq parseFrom(
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        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
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    public static io.grpc.alts.internal.Handshaker.StartServerHandshakeReq parseFrom(
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      return this == DEFAULT_INSTANCE
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      Builder builder = new Builder(parent);
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    /**
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     */
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        com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
        // @@protoc_insertion_point(builder_implements:grpc.gcp.StartServerHandshakeReq)
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                "Invalid map field number: " + number);
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       * <pre>
       * The application protocols supported by the server, e.g., "h2" (for http2),
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       */
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       * <pre>
       * The application protocols supported by the server, e.g., "h2" (for http2),
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       *
       * <code>repeated string application_protocols = 1;</code>
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       * <pre>
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       *
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       */
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       * <pre>
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       *
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       */
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       * <pre>
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       *
       * <code>repeated string application_protocols = 1;</code>
       */
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        if (value == null) {
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        onChanged();
        return this;
      }
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       * <pre>
       * The application protocols supported by the server, e.g., "h2" (for http2),
       * "grpc".
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       *
       * <code>repeated string application_protocols = 1;</code>
       */
      public Builder addAllApplicationProtocols(
          java.lang.Iterable<java.lang.String> values) {
        ensureApplicationProtocolsIsMutable();
        com.google.protobuf.AbstractMessageLite.Builder.addAll(
            values, applicationProtocols_);
        onChanged();
        return this;
      }
      /**
       * <pre>
       * The application protocols supported by the server, e.g., "h2" (for http2),
       * "grpc".
       * </pre>
       *
       * <code>repeated string application_protocols = 1;</code>
       */
      public Builder clearApplicationProtocols() {
        applicationProtocols_ = com.google.protobuf.LazyStringArrayList.EMPTY;
        bitField0_ = (bitField0_ & ~0x00000001);
        onChanged();
        return this;
      }
      /**
       * <pre>
       * The application protocols supported by the server, e.g., "h2" (for http2),
       * "grpc".
       * </pre>
       *
       * <code>repeated string application_protocols = 1;</code>
       */
      public Builder addApplicationProtocolsBytes(
          com.google.protobuf.ByteString value) {
        if (value == null) {
    throw new NullPointerException();
  }
  checkByteStringIsUtf8(value);
        ensureApplicationProtocolsIsMutable();
        applicationProtocols_.add(value);
        onChanged();
        return this;
      }

      private com.google.protobuf.MapField<
          java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters> handshakeParameters_;
      private com.google.protobuf.MapField<java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters>
      internalGetHandshakeParameters() {
        if (handshakeParameters_ == null) {
          return com.google.protobuf.MapField.emptyMapField(
              HandshakeParametersDefaultEntryHolder.defaultEntry);
        }
        return handshakeParameters_;
      }
      private com.google.protobuf.MapField<java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters>
      internalGetMutableHandshakeParameters() {
        onChanged();;
        if (handshakeParameters_ == null) {
          handshakeParameters_ = com.google.protobuf.MapField.newMapField(
              HandshakeParametersDefaultEntryHolder.defaultEntry);
        }
        if (!handshakeParameters_.isMutable()) {
          handshakeParameters_ = handshakeParameters_.copy();
        }
        return handshakeParameters_;
      }

      public int getHandshakeParametersCount() {
        return internalGetHandshakeParameters().getMap().size();
      }
      /**
       * <pre>
       * Handshake parameters (record protocols and local identities supported by
       * the server) mapped by the handshake protocol. Each handshake security
       * protocol (e.g., TLS or ALTS) has its own set of record protocols and local
       * identities. Since protobuf does not support enum as key to the map, the key
       * to handshake_parameters is the integer value of HandshakeProtocol enum.
       * </pre>
       *
       * <code>map&lt;int32, .grpc.gcp.ServerHandshakeParameters&gt; handshake_parameters = 2;</code>
       */

      public boolean containsHandshakeParameters(
          int key) {
        
        return internalGetHandshakeParameters().getMap().containsKey(key);
      }
      /**
       * Use {@link #getHandshakeParametersMap()} instead.
       */
      @java.lang.Deprecated
      public java.util.Map<java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters> getHandshakeParameters() {
        return getHandshakeParametersMap();
      }
      /**
       * <pre>
       * Handshake parameters (record protocols and local identities supported by
       * the server) mapped by the handshake protocol. Each handshake security
       * protocol (e.g., TLS or ALTS) has its own set of record protocols and local
       * identities. Since protobuf does not support enum as key to the map, the key
       * to handshake_parameters is the integer value of HandshakeProtocol enum.
       * </pre>
       *
       * <code>map&lt;int32, .grpc.gcp.ServerHandshakeParameters&gt; handshake_parameters = 2;</code>
       */

      public java.util.Map<java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters> getHandshakeParametersMap() {
        return internalGetHandshakeParameters().getMap();
      }
      /**
       * <pre>
       * Handshake parameters (record protocols and local identities supported by
       * the server) mapped by the handshake protocol. Each handshake security
       * protocol (e.g., TLS or ALTS) has its own set of record protocols and local
       * identities. Since protobuf does not support enum as key to the map, the key
       * to handshake_parameters is the integer value of HandshakeProtocol enum.
       * </pre>
       *
       * <code>map&lt;int32, .grpc.gcp.ServerHandshakeParameters&gt; handshake_parameters = 2;</code>
       */

      public io.grpc.alts.internal.Handshaker.ServerHandshakeParameters getHandshakeParametersOrDefault(
          int key,
          io.grpc.alts.internal.Handshaker.ServerHandshakeParameters defaultValue) {
        
        java.util.Map<java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters> map =
            internalGetHandshakeParameters().getMap();
        return map.containsKey(key) ? map.get(key) : defaultValue;
      }
      /**
       * <pre>
       * Handshake parameters (record protocols and local identities supported by
       * the server) mapped by the handshake protocol. Each handshake security
       * protocol (e.g., TLS or ALTS) has its own set of record protocols and local
       * identities. Since protobuf does not support enum as key to the map, the key
       * to handshake_parameters is the integer value of HandshakeProtocol enum.
       * </pre>
       *
       * <code>map&lt;int32, .grpc.gcp.ServerHandshakeParameters&gt; handshake_parameters = 2;</code>
       */

      public io.grpc.alts.internal.Handshaker.ServerHandshakeParameters getHandshakeParametersOrThrow(
          int key) {
        
        java.util.Map<java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters> map =
            internalGetHandshakeParameters().getMap();
        if (!map.containsKey(key)) {
          throw new java.lang.IllegalArgumentException();
        }
        return map.get(key);
      }

      public Builder clearHandshakeParameters() {
        internalGetMutableHandshakeParameters().getMutableMap()
            .clear();
        return this;
      }
      /**
       * <pre>
       * Handshake parameters (record protocols and local identities supported by
       * the server) mapped by the handshake protocol. Each handshake security
       * protocol (e.g., TLS or ALTS) has its own set of record protocols and local
       * identities. Since protobuf does not support enum as key to the map, the key
       * to handshake_parameters is the integer value of HandshakeProtocol enum.
       * </pre>
       *
       * <code>map&lt;int32, .grpc.gcp.ServerHandshakeParameters&gt; handshake_parameters = 2;</code>
       */

      public Builder removeHandshakeParameters(
          int key) {
        
        internalGetMutableHandshakeParameters().getMutableMap()
            .remove(key);
        return this;
      }
      /**
       * Use alternate mutation accessors instead.
       */
      @java.lang.Deprecated
      public java.util.Map<java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters>
      getMutableHandshakeParameters() {
        return internalGetMutableHandshakeParameters().getMutableMap();
      }
      /**
       * <pre>
       * Handshake parameters (record protocols and local identities supported by
       * the server) mapped by the handshake protocol. Each handshake security
       * protocol (e.g., TLS or ALTS) has its own set of record protocols and local
       * identities. Since protobuf does not support enum as key to the map, the key
       * to handshake_parameters is the integer value of HandshakeProtocol enum.
       * </pre>
       *
       * <code>map&lt;int32, .grpc.gcp.ServerHandshakeParameters&gt; handshake_parameters = 2;</code>
       */
      public Builder putHandshakeParameters(
          int key,
          io.grpc.alts.internal.Handshaker.ServerHandshakeParameters value) {
        
        if (value == null) { throw new java.lang.NullPointerException(); }
        internalGetMutableHandshakeParameters().getMutableMap()
            .put(key, value);
        return this;
      }
      /**
       * <pre>
       * Handshake parameters (record protocols and local identities supported by
       * the server) mapped by the handshake protocol. Each handshake security
       * protocol (e.g., TLS or ALTS) has its own set of record protocols and local
       * identities. Since protobuf does not support enum as key to the map, the key
       * to handshake_parameters is the integer value of HandshakeProtocol enum.
       * </pre>
       *
       * <code>map&lt;int32, .grpc.gcp.ServerHandshakeParameters&gt; handshake_parameters = 2;</code>
       */

      public Builder putAllHandshakeParameters(
          java.util.Map<java.lang.Integer, io.grpc.alts.internal.Handshaker.ServerHandshakeParameters> values) {
        internalGetMutableHandshakeParameters().getMutableMap()
            .putAll(values);
        return this;
      }

      private com.google.protobuf.ByteString inBytes_ = com.google.protobuf.ByteString.EMPTY;
      /**
       * <pre>
       * Bytes in out_frames returned from the peer's HandshakerResp. It is possible
       * that the peer's out_frames are split into multiple HandshakReq messages.
       * </pre>
       *
       * <code>bytes in_bytes = 3;</code>
       */
      public com.google.protobuf.ByteString getInBytes() {
        return inBytes_;
      }
      /**
       * <pre>
       * Bytes in out_frames returned from the peer's HandshakerResp. It is possible
       * that the peer's out_frames are split into multiple HandshakReq messages.
       * </pre>
       *
       * <code>bytes in_bytes = 3;</code>
       */
      public Builder setInBytes(com.google.protobuf.ByteString value) {
        if (value == null) {
    throw new NullPointerException();
  }
  
        inBytes_ = value;
        onChanged();
        return this;
      }
      /**
       * <pre>
       * Bytes in out_frames returned from the peer's HandshakerResp. It is possible
       * that the peer's out_frames are split into multiple HandshakReq messages.
       * </pre>
       *
       * <code>bytes in_bytes = 3;</code>
       */
      public Builder clearInBytes() {
        
        inBytes_ = getDefaultInstance().getInBytes();
        onChanged();
        return this;
      }

      private io.grpc.alts.internal.Handshaker.Endpoint localEndpoint_ = null;
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.Endpoint, io.grpc.alts.internal.Handshaker.Endpoint.Builder, io.grpc.alts.internal.Handshaker.EndpointOrBuilder> localEndpointBuilder_;
      /**
       * <pre>
       * (Optional) Local endpoint information of the connection to the client,
       * such as local IP address, port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint local_endpoint = 4;</code>
       */
      public boolean hasLocalEndpoint() {
        return localEndpointBuilder_ != null || localEndpoint_ != null;
      }
      /**
       * <pre>
       * (Optional) Local endpoint information of the connection to the client,
       * such as local IP address, port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint local_endpoint = 4;</code>
       */
      public io.grpc.alts.internal.Handshaker.Endpoint getLocalEndpoint() {
        if (localEndpointBuilder_ == null) {
          return localEndpoint_ == null ? io.grpc.alts.internal.Handshaker.Endpoint.getDefaultInstance() : localEndpoint_;
        } else {
          return localEndpointBuilder_.getMessage();
        }
      }
      /**
       * <pre>
       * (Optional) Local endpoint information of the connection to the client,
       * such as local IP address, port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint local_endpoint = 4;</code>
       */
      public Builder setLocalEndpoint(io.grpc.alts.internal.Handshaker.Endpoint value) {
        if (localEndpointBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          localEndpoint_ = value;
          onChanged();
        } else {
          localEndpointBuilder_.setMessage(value);
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Local endpoint information of the connection to the client,
       * such as local IP address, port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint local_endpoint = 4;</code>
       */
      public Builder setLocalEndpoint(
          io.grpc.alts.internal.Handshaker.Endpoint.Builder builderForValue) {
        if (localEndpointBuilder_ == null) {
          localEndpoint_ = builderForValue.build();
          onChanged();
        } else {
          localEndpointBuilder_.setMessage(builderForValue.build());
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Local endpoint information of the connection to the client,
       * such as local IP address, port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint local_endpoint = 4;</code>
       */
      public Builder mergeLocalEndpoint(io.grpc.alts.internal.Handshaker.Endpoint value) {
        if (localEndpointBuilder_ == null) {
          if (localEndpoint_ != null) {
            localEndpoint_ =
              io.grpc.alts.internal.Handshaker.Endpoint.newBuilder(localEndpoint_).mergeFrom(value).buildPartial();
          } else {
            localEndpoint_ = value;
          }
          onChanged();
        } else {
          localEndpointBuilder_.mergeFrom(value);
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Local endpoint information of the connection to the client,
       * such as local IP address, port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint local_endpoint = 4;</code>
       */
      public Builder clearLocalEndpoint() {
        if (localEndpointBuilder_ == null) {
          localEndpoint_ = null;
          onChanged();
        } else {
          localEndpoint_ = null;
          localEndpointBuilder_ = null;
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Local endpoint information of the connection to the client,
       * such as local IP address, port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint local_endpoint = 4;</code>
       */
      public io.grpc.alts.internal.Handshaker.Endpoint.Builder getLocalEndpointBuilder() {
        
        onChanged();
        return getLocalEndpointFieldBuilder().getBuilder();
      }
      /**
       * <pre>
       * (Optional) Local endpoint information of the connection to the client,
       * such as local IP address, port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint local_endpoint = 4;</code>
       */
      public io.grpc.alts.internal.Handshaker.EndpointOrBuilder getLocalEndpointOrBuilder() {
        if (localEndpointBuilder_ != null) {
          return localEndpointBuilder_.getMessageOrBuilder();
        } else {
          return localEndpoint_ == null ?
              io.grpc.alts.internal.Handshaker.Endpoint.getDefaultInstance() : localEndpoint_;
        }
      }
      /**
       * <pre>
       * (Optional) Local endpoint information of the connection to the client,
       * such as local IP address, port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint local_endpoint = 4;</code>
       */
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.Endpoint, io.grpc.alts.internal.Handshaker.Endpoint.Builder, io.grpc.alts.internal.Handshaker.EndpointOrBuilder> 
          getLocalEndpointFieldBuilder() {
        if (localEndpointBuilder_ == null) {
          localEndpointBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
              io.grpc.alts.internal.Handshaker.Endpoint, io.grpc.alts.internal.Handshaker.Endpoint.Builder, io.grpc.alts.internal.Handshaker.EndpointOrBuilder>(
                  getLocalEndpoint(),
                  getParentForChildren(),
                  isClean());
          localEndpoint_ = null;
        }
        return localEndpointBuilder_;
      }

      private io.grpc.alts.internal.Handshaker.Endpoint remoteEndpoint_ = null;
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.Endpoint, io.grpc.alts.internal.Handshaker.Endpoint.Builder, io.grpc.alts.internal.Handshaker.EndpointOrBuilder> remoteEndpointBuilder_;
      /**
       * <pre>
       * (Optional) Endpoint information of the remote client, such as IP address,
       * port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint remote_endpoint = 5;</code>
       */
      public boolean hasRemoteEndpoint() {
        return remoteEndpointBuilder_ != null || remoteEndpoint_ != null;
      }
      /**
       * <pre>
       * (Optional) Endpoint information of the remote client, such as IP address,
       * port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint remote_endpoint = 5;</code>
       */
      public io.grpc.alts.internal.Handshaker.Endpoint getRemoteEndpoint() {
        if (remoteEndpointBuilder_ == null) {
          return remoteEndpoint_ == null ? io.grpc.alts.internal.Handshaker.Endpoint.getDefaultInstance() : remoteEndpoint_;
        } else {
          return remoteEndpointBuilder_.getMessage();
        }
      }
      /**
       * <pre>
       * (Optional) Endpoint information of the remote client, such as IP address,
       * port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint remote_endpoint = 5;</code>
       */
      public Builder setRemoteEndpoint(io.grpc.alts.internal.Handshaker.Endpoint value) {
        if (remoteEndpointBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          remoteEndpoint_ = value;
          onChanged();
        } else {
          remoteEndpointBuilder_.setMessage(value);
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Endpoint information of the remote client, such as IP address,
       * port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint remote_endpoint = 5;</code>
       */
      public Builder setRemoteEndpoint(
          io.grpc.alts.internal.Handshaker.Endpoint.Builder builderForValue) {
        if (remoteEndpointBuilder_ == null) {
          remoteEndpoint_ = builderForValue.build();
          onChanged();
        } else {
          remoteEndpointBuilder_.setMessage(builderForValue.build());
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Endpoint information of the remote client, such as IP address,
       * port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint remote_endpoint = 5;</code>
       */
      public Builder mergeRemoteEndpoint(io.grpc.alts.internal.Handshaker.Endpoint value) {
        if (remoteEndpointBuilder_ == null) {
          if (remoteEndpoint_ != null) {
            remoteEndpoint_ =
              io.grpc.alts.internal.Handshaker.Endpoint.newBuilder(remoteEndpoint_).mergeFrom(value).buildPartial();
          } else {
            remoteEndpoint_ = value;
          }
          onChanged();
        } else {
          remoteEndpointBuilder_.mergeFrom(value);
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Endpoint information of the remote client, such as IP address,
       * port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint remote_endpoint = 5;</code>
       */
      public Builder clearRemoteEndpoint() {
        if (remoteEndpointBuilder_ == null) {
          remoteEndpoint_ = null;
          onChanged();
        } else {
          remoteEndpoint_ = null;
          remoteEndpointBuilder_ = null;
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) Endpoint information of the remote client, such as IP address,
       * port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint remote_endpoint = 5;</code>
       */
      public io.grpc.alts.internal.Handshaker.Endpoint.Builder getRemoteEndpointBuilder() {
        
        onChanged();
        return getRemoteEndpointFieldBuilder().getBuilder();
      }
      /**
       * <pre>
       * (Optional) Endpoint information of the remote client, such as IP address,
       * port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint remote_endpoint = 5;</code>
       */
      public io.grpc.alts.internal.Handshaker.EndpointOrBuilder getRemoteEndpointOrBuilder() {
        if (remoteEndpointBuilder_ != null) {
          return remoteEndpointBuilder_.getMessageOrBuilder();
        } else {
          return remoteEndpoint_ == null ?
              io.grpc.alts.internal.Handshaker.Endpoint.getDefaultInstance() : remoteEndpoint_;
        }
      }
      /**
       * <pre>
       * (Optional) Endpoint information of the remote client, such as IP address,
       * port number, and network protocol.
       * </pre>
       *
       * <code>.grpc.gcp.Endpoint remote_endpoint = 5;</code>
       */
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.Endpoint, io.grpc.alts.internal.Handshaker.Endpoint.Builder, io.grpc.alts.internal.Handshaker.EndpointOrBuilder> 
          getRemoteEndpointFieldBuilder() {
        if (remoteEndpointBuilder_ == null) {
          remoteEndpointBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
              io.grpc.alts.internal.Handshaker.Endpoint, io.grpc.alts.internal.Handshaker.Endpoint.Builder, io.grpc.alts.internal.Handshaker.EndpointOrBuilder>(
                  getRemoteEndpoint(),
                  getParentForChildren(),
                  isClean());
          remoteEndpoint_ = null;
        }
        return remoteEndpointBuilder_;
      }

      private io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions rpcVersions_ = null;
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions, io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.Builder, io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersionsOrBuilder> rpcVersionsBuilder_;
      /**
       * <pre>
       * (Optional) RPC protocol versions supported by the server.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 6;</code>
       */
      public boolean hasRpcVersions() {
        return rpcVersionsBuilder_ != null || rpcVersions_ != null;
      }
      /**
       * <pre>
       * (Optional) RPC protocol versions supported by the server.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 6;</code>
       */
      public io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions getRpcVersions() {
        if (rpcVersionsBuilder_ == null) {
          return rpcVersions_ == null ? io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.getDefaultInstance() : rpcVersions_;
        } else {
          return rpcVersionsBuilder_.getMessage();
        }
      }
      /**
       * <pre>
       * (Optional) RPC protocol versions supported by the server.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 6;</code>
       */
      public Builder setRpcVersions(io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions value) {
        if (rpcVersionsBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          rpcVersions_ = value;
          onChanged();
        } else {
          rpcVersionsBuilder_.setMessage(value);
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) RPC protocol versions supported by the server.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 6;</code>
       */
      public Builder setRpcVersions(
          io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.Builder builderForValue) {
        if (rpcVersionsBuilder_ == null) {
          rpcVersions_ = builderForValue.build();
          onChanged();
        } else {
          rpcVersionsBuilder_.setMessage(builderForValue.build());
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) RPC protocol versions supported by the server.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 6;</code>
       */
      public Builder mergeRpcVersions(io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions value) {
        if (rpcVersionsBuilder_ == null) {
          if (rpcVersions_ != null) {
            rpcVersions_ =
              io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.newBuilder(rpcVersions_).mergeFrom(value).buildPartial();
          } else {
            rpcVersions_ = value;
          }
          onChanged();
        } else {
          rpcVersionsBuilder_.mergeFrom(value);
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) RPC protocol versions supported by the server.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 6;</code>
       */
      public Builder clearRpcVersions() {
        if (rpcVersionsBuilder_ == null) {
          rpcVersions_ = null;
          onChanged();
        } else {
          rpcVersions_ = null;
          rpcVersionsBuilder_ = null;
        }

        return this;
      }
      /**
       * <pre>
       * (Optional) RPC protocol versions supported by the server.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 6;</code>
       */
      public io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.Builder getRpcVersionsBuilder() {
        
        onChanged();
        return getRpcVersionsFieldBuilder().getBuilder();
      }
      /**
       * <pre>
       * (Optional) RPC protocol versions supported by the server.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 6;</code>
       */
      public io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersionsOrBuilder getRpcVersionsOrBuilder() {
        if (rpcVersionsBuilder_ != null) {
          return rpcVersionsBuilder_.getMessageOrBuilder();
        } else {
          return rpcVersions_ == null ?
              io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.getDefaultInstance() : rpcVersions_;
        }
      }
      /**
       * <pre>
       * (Optional) RPC protocol versions supported by the server.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions rpc_versions = 6;</code>
       */
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       * <code>.grpc.gcp.StartClientHandshakeReq client_start = 1;</code>
       */
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.StartClientHandshakeReq, io.grpc.alts.internal.Handshaker.StartClientHandshakeReq.Builder, io.grpc.alts.internal.Handshaker.StartClientHandshakeReqOrBuilder> 
          getClientStartFieldBuilder() {
        if (clientStartBuilder_ == null) {
          if (!(reqOneofCase_ == 1)) {
            reqOneof_ = io.grpc.alts.internal.Handshaker.StartClientHandshakeReq.getDefaultInstance();
          }
          clientStartBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
              io.grpc.alts.internal.Handshaker.StartClientHandshakeReq, io.grpc.alts.internal.Handshaker.StartClientHandshakeReq.Builder, io.grpc.alts.internal.Handshaker.StartClientHandshakeReqOrBuilder>(
                  (io.grpc.alts.internal.Handshaker.StartClientHandshakeReq) reqOneof_,
                  getParentForChildren(),
                  isClean());
          reqOneof_ = null;
        }
        reqOneofCase_ = 1;
        onChanged();;
        return clientStartBuilder_;
      }

      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.StartServerHandshakeReq, io.grpc.alts.internal.Handshaker.StartServerHandshakeReq.Builder, io.grpc.alts.internal.Handshaker.StartServerHandshakeReqOrBuilder> serverStartBuilder_;
      /**
       * <pre>
       * The start server handshake request message.
       * </pre>
       *
       * <code>.grpc.gcp.StartServerHandshakeReq server_start = 2;</code>
       */
      public boolean hasServerStart() {
        return reqOneofCase_ == 2;
      }
      /**
       * <pre>
       * The start server handshake request message.
       * </pre>
       *
       * <code>.grpc.gcp.StartServerHandshakeReq server_start = 2;</code>
       */
      public io.grpc.alts.internal.Handshaker.StartServerHandshakeReq getServerStart() {
        if (serverStartBuilder_ == null) {
          if (reqOneofCase_ == 2) {
            return (io.grpc.alts.internal.Handshaker.StartServerHandshakeReq) reqOneof_;
          }
          return io.grpc.alts.internal.Handshaker.StartServerHandshakeReq.getDefaultInstance();
        } else {
          if (reqOneofCase_ == 2) {
            return serverStartBuilder_.getMessage();
          }
          return io.grpc.alts.internal.Handshaker.StartServerHandshakeReq.getDefaultInstance();
        }
      }
      /**
       * <pre>
       * The start server handshake request message.
       * </pre>
       *
       * <code>.grpc.gcp.StartServerHandshakeReq server_start = 2;</code>
       */
      public Builder setServerStart(io.grpc.alts.internal.Handshaker.StartServerHandshakeReq value) {
        if (serverStartBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          reqOneof_ = value;
          onChanged();
        } else {
          serverStartBuilder_.setMessage(value);
        }
        reqOneofCase_ = 2;
        return this;
      }
      /**
       * <pre>
       * The start server handshake request message.
       * </pre>
       *
       * <code>.grpc.gcp.StartServerHandshakeReq server_start = 2;</code>
       */
      public Builder setServerStart(
          io.grpc.alts.internal.Handshaker.StartServerHandshakeReq.Builder builderForValue) {
        if (serverStartBuilder_ == null) {
          reqOneof_ = builderForValue.build();
          onChanged();
        } else {
          serverStartBuilder_.setMessage(builderForValue.build());
        }
        reqOneofCase_ = 2;
        return this;
      }
      /**
       * <pre>
       * The start server handshake request message.
       * </pre>
       *
       * <code>.grpc.gcp.StartServerHandshakeReq server_start = 2;</code>
       */
      public Builder mergeServerStart(io.grpc.alts.internal.Handshaker.StartServerHandshakeReq value) {
        if (serverStartBuilder_ == null) {
          if (reqOneofCase_ == 2 &&
              reqOneof_ != io.grpc.alts.internal.Handshaker.StartServerHandshakeReq.getDefaultInstance()) {
            reqOneof_ = io.grpc.alts.internal.Handshaker.StartServerHandshakeReq.newBuilder((io.grpc.alts.internal.Handshaker.StartServerHandshakeReq) reqOneof_)
                .mergeFrom(value).buildPartial();
          } else {
            reqOneof_ = value;
          }
          onChanged();
        } else {
          if (reqOneofCase_ == 2) {
            serverStartBuilder_.mergeFrom(value);
          }
          serverStartBuilder_.setMessage(value);
        }
        reqOneofCase_ = 2;
        return this;
      }
      /**
       * <pre>
       * The start server handshake request message.
       * </pre>
       *
       * <code>.grpc.gcp.StartServerHandshakeReq server_start = 2;</code>
       */
      public Builder clearServerStart() {
        if (serverStartBuilder_ == null) {
          if (reqOneofCase_ == 2) {
            reqOneofCase_ = 0;
            reqOneof_ = null;
            onChanged();
          }
        } else {
          if (reqOneofCase_ == 2) {
            reqOneofCase_ = 0;
            reqOneof_ = null;
          }
          serverStartBuilder_.clear();
        }
        return this;
      }
      /**
       * <pre>
       * The start server handshake request message.
       * </pre>
       *
       * <code>.grpc.gcp.StartServerHandshakeReq server_start = 2;</code>
       */
      public io.grpc.alts.internal.Handshaker.StartServerHandshakeReq.Builder getServerStartBuilder() {
        return getServerStartFieldBuilder().getBuilder();
      }
      /**
       * <pre>
       * The start server handshake request message.
       * </pre>
       *
       * <code>.grpc.gcp.StartServerHandshakeReq server_start = 2;</code>
       */
      public io.grpc.alts.internal.Handshaker.StartServerHandshakeReqOrBuilder getServerStartOrBuilder() {
        if ((reqOneofCase_ == 2) && (serverStartBuilder_ != null)) {
          return serverStartBuilder_.getMessageOrBuilder();
        } else {
          if (reqOneofCase_ == 2) {
            return (io.grpc.alts.internal.Handshaker.StartServerHandshakeReq) reqOneof_;
          }
          return io.grpc.alts.internal.Handshaker.StartServerHandshakeReq.getDefaultInstance();
        }
      }
      /**
       * <pre>
       * The start server handshake request message.
       * </pre>
       *
       * <code>.grpc.gcp.StartServerHandshakeReq server_start = 2;</code>
       */
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.StartServerHandshakeReq, io.grpc.alts.internal.Handshaker.StartServerHandshakeReq.Builder, io.grpc.alts.internal.Handshaker.StartServerHandshakeReqOrBuilder> 
          getServerStartFieldBuilder() {
        if (serverStartBuilder_ == null) {
          if (!(reqOneofCase_ == 2)) {
            reqOneof_ = io.grpc.alts.internal.Handshaker.StartServerHandshakeReq.getDefaultInstance();
          }
          serverStartBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
              io.grpc.alts.internal.Handshaker.StartServerHandshakeReq, io.grpc.alts.internal.Handshaker.StartServerHandshakeReq.Builder, io.grpc.alts.internal.Handshaker.StartServerHandshakeReqOrBuilder>(
                  (io.grpc.alts.internal.Handshaker.StartServerHandshakeReq) reqOneof_,
                  getParentForChildren(),
                  isClean());
          reqOneof_ = null;
        }
        reqOneofCase_ = 2;
        onChanged();;
        return serverStartBuilder_;
      }

      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq, io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq.Builder, io.grpc.alts.internal.Handshaker.NextHandshakeMessageReqOrBuilder> nextBuilder_;
      /**
       * <pre>
       * The next handshake request message.
       * </pre>
       *
       * <code>.grpc.gcp.NextHandshakeMessageReq next = 3;</code>
       */
      public boolean hasNext() {
        return reqOneofCase_ == 3;
      }
      /**
       * <pre>
       * The next handshake request message.
       * </pre>
       *
       * <code>.grpc.gcp.NextHandshakeMessageReq next = 3;</code>
       */
      public io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq getNext() {
        if (nextBuilder_ == null) {
          if (reqOneofCase_ == 3) {
            return (io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq) reqOneof_;
          }
          return io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq.getDefaultInstance();
        } else {
          if (reqOneofCase_ == 3) {
            return nextBuilder_.getMessage();
          }
          return io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq.getDefaultInstance();
        }
      }
      /**
       * <pre>
       * The next handshake request message.
       * </pre>
       *
       * <code>.grpc.gcp.NextHandshakeMessageReq next = 3;</code>
       */
      public Builder setNext(io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq value) {
        if (nextBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          reqOneof_ = value;
          onChanged();
        } else {
          nextBuilder_.setMessage(value);
        }
        reqOneofCase_ = 3;
        return this;
      }
      /**
       * <pre>
       * The next handshake request message.
       * </pre>
       *
       * <code>.grpc.gcp.NextHandshakeMessageReq next = 3;</code>
       */
      public Builder setNext(
          io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq.Builder builderForValue) {
        if (nextBuilder_ == null) {
          reqOneof_ = builderForValue.build();
          onChanged();
        } else {
          nextBuilder_.setMessage(builderForValue.build());
        }
        reqOneofCase_ = 3;
        return this;
      }
      /**
       * <pre>
       * The next handshake request message.
       * </pre>
       *
       * <code>.grpc.gcp.NextHandshakeMessageReq next = 3;</code>
       */
      public Builder mergeNext(io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq value) {
        if (nextBuilder_ == null) {
          if (reqOneofCase_ == 3 &&
              reqOneof_ != io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq.getDefaultInstance()) {
            reqOneof_ = io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq.newBuilder((io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq) reqOneof_)
                .mergeFrom(value).buildPartial();
          } else {
            reqOneof_ = value;
          }
          onChanged();
        } else {
          if (reqOneofCase_ == 3) {
            nextBuilder_.mergeFrom(value);
          }
          nextBuilder_.setMessage(value);
        }
        reqOneofCase_ = 3;
        return this;
      }
      /**
       * <pre>
       * The next handshake request message.
       * </pre>
       *
       * <code>.grpc.gcp.NextHandshakeMessageReq next = 3;</code>
       */
      public Builder clearNext() {
        if (nextBuilder_ == null) {
          if (reqOneofCase_ == 3) {
            reqOneofCase_ = 0;
            reqOneof_ = null;
            onChanged();
          }
        } else {
          if (reqOneofCase_ == 3) {
            reqOneofCase_ = 0;
            reqOneof_ = null;
          }
          nextBuilder_.clear();
        }
        return this;
      }
      /**
       * <pre>
       * The next handshake request message.
       * </pre>
       *
       * <code>.grpc.gcp.NextHandshakeMessageReq next = 3;</code>
       */
      public io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq.Builder getNextBuilder() {
        return getNextFieldBuilder().getBuilder();
      }
      /**
       * <pre>
       * The next handshake request message.
       * </pre>
       *
       * <code>.grpc.gcp.NextHandshakeMessageReq next = 3;</code>
       */
      public io.grpc.alts.internal.Handshaker.NextHandshakeMessageReqOrBuilder getNextOrBuilder() {
        if ((reqOneofCase_ == 3) && (nextBuilder_ != null)) {
          return nextBuilder_.getMessageOrBuilder();
        } else {
          if (reqOneofCase_ == 3) {
            return (io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq) reqOneof_;
          }
          return io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq.getDefaultInstance();
        }
      }
      /**
       * <pre>
       * The next handshake request message.
       * </pre>
       *
       * <code>.grpc.gcp.NextHandshakeMessageReq next = 3;</code>
       */
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq, io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq.Builder, io.grpc.alts.internal.Handshaker.NextHandshakeMessageReqOrBuilder> 
          getNextFieldBuilder() {
        if (nextBuilder_ == null) {
          if (!(reqOneofCase_ == 3)) {
            reqOneof_ = io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq.getDefaultInstance();
          }
          nextBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
              io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq, io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq.Builder, io.grpc.alts.internal.Handshaker.NextHandshakeMessageReqOrBuilder>(
                  (io.grpc.alts.internal.Handshaker.NextHandshakeMessageReq) reqOneof_,
                  getParentForChildren(),
                  isClean());
          reqOneof_ = null;
        }
        reqOneofCase_ = 3;
        onChanged();;
        return nextBuilder_;
      }
      public final Builder setUnknownFields(
          final com.google.protobuf.UnknownFieldSet unknownFields) {
        return super.setUnknownFieldsProto3(unknownFields);
      }

      public final Builder mergeUnknownFields(
          final com.google.protobuf.UnknownFieldSet unknownFields) {
        return super.mergeUnknownFields(unknownFields);
      }


      // @@protoc_insertion_point(builder_scope:grpc.gcp.HandshakerReq)
    }

    // @@protoc_insertion_point(class_scope:grpc.gcp.HandshakerReq)
    private static final io.grpc.alts.internal.Handshaker.HandshakerReq DEFAULT_INSTANCE;
    static {
      DEFAULT_INSTANCE = new io.grpc.alts.internal.Handshaker.HandshakerReq();
    }

    public static io.grpc.alts.internal.Handshaker.HandshakerReq getDefaultInstance() {
      return DEFAULT_INSTANCE;
    }

    private static final com.google.protobuf.Parser<HandshakerReq>
        PARSER = new com.google.protobuf.AbstractParser<HandshakerReq>() {
      public HandshakerReq parsePartialFrom(
          com.google.protobuf.CodedInputStream input,
          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
          throws com.google.protobuf.InvalidProtocolBufferException {
        return new HandshakerReq(input, extensionRegistry);
      }
    };

    public static com.google.protobuf.Parser<HandshakerReq> parser() {
      return PARSER;
    }

    @java.lang.Override
    public com.google.protobuf.Parser<HandshakerReq> getParserForType() {
      return PARSER;
    }

    public io.grpc.alts.internal.Handshaker.HandshakerReq getDefaultInstanceForType() {
      return DEFAULT_INSTANCE;
    }

  }

  public interface HandshakerResultOrBuilder extends
      // @@protoc_insertion_point(interface_extends:grpc.gcp.HandshakerResult)
      com.google.protobuf.MessageOrBuilder {

    /**
     * <pre>
     * The application protocol negotiated for this connection.
     * </pre>
     *
     * <code>string application_protocol = 1;</code>
     */
    java.lang.String getApplicationProtocol();
    /**
     * <pre>
     * The application protocol negotiated for this connection.
     * </pre>
     *
     * <code>string application_protocol = 1;</code>
     */
    com.google.protobuf.ByteString
        getApplicationProtocolBytes();

    /**
     * <pre>
     * The record protocol negotiated for this connection.
     * </pre>
     *
     * <code>string record_protocol = 2;</code>
     */
    java.lang.String getRecordProtocol();
    /**
     * <pre>
     * The record protocol negotiated for this connection.
     * </pre>
     *
     * <code>string record_protocol = 2;</code>
     */
    com.google.protobuf.ByteString
        getRecordProtocolBytes();

    /**
     * <pre>
     * Cryptographic key data. The key data may be more than the key length
     * required for the record protocol, thus the client of the handshaker
     * service needs to truncate the key data into the right key length.
     * </pre>
     *
     * <code>bytes key_data = 3;</code>
     */
    com.google.protobuf.ByteString getKeyData();

    /**
     * <pre>
     * The authenticated identity of the peer.
     * </pre>
     *
     * <code>.grpc.gcp.Identity peer_identity = 4;</code>
     */
    boolean hasPeerIdentity();
    /**
     * <pre>
     * The authenticated identity of the peer.
     * </pre>
     *
     * <code>.grpc.gcp.Identity peer_identity = 4;</code>
     */
    io.grpc.alts.internal.Handshaker.Identity getPeerIdentity();
    /**
     * <pre>
     * The authenticated identity of the peer.
     * </pre>
     *
     * <code>.grpc.gcp.Identity peer_identity = 4;</code>
     */
    io.grpc.alts.internal.Handshaker.IdentityOrBuilder getPeerIdentityOrBuilder();

    /**
     * <pre>
     * The local identity used in the handshake.
     * </pre>
     *
     * <code>.grpc.gcp.Identity local_identity = 5;</code>
     */
    boolean hasLocalIdentity();
    /**
     * <pre>
     * The local identity used in the handshake.
     * </pre>
     *
     * <code>.grpc.gcp.Identity local_identity = 5;</code>
     */
    io.grpc.alts.internal.Handshaker.Identity getLocalIdentity();
    /**
     * <pre>
     * The local identity used in the handshake.
     * </pre>
     *
     * <code>.grpc.gcp.Identity local_identity = 5;</code>
     */
    io.grpc.alts.internal.Handshaker.IdentityOrBuilder getLocalIdentityOrBuilder();

    /**
     * <pre>
     * Indicate whether the handshaker service client should keep the channel
     * between the handshaker service open, e.g., in order to handle
     * post-handshake messages in the future.
     * </pre>
     *
     * <code>bool keep_channel_open = 6;</code>
     */
    boolean getKeepChannelOpen();

    /**
     * <pre>
     * The RPC protocol versions supported by the peer.
     * </pre>
     *
     * <code>.grpc.gcp.RpcProtocolVersions peer_rpc_versions = 7;</code>
     */
    boolean hasPeerRpcVersions();
    /**
     * <pre>
     * The RPC protocol versions supported by the peer.
     * </pre>
     *
     * <code>.grpc.gcp.RpcProtocolVersions peer_rpc_versions = 7;</code>
     */
    io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions getPeerRpcVersions();
    /**
     * <pre>
     * The RPC protocol versions supported by the peer.
     * </pre>
     *
     * <code>.grpc.gcp.RpcProtocolVersions peer_rpc_versions = 7;</code>
     */
    io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersionsOrBuilder getPeerRpcVersionsOrBuilder();
  }
  /**
   * Protobuf type {@code grpc.gcp.HandshakerResult}
   */
  public  static final class HandshakerResult extends
      com.google.protobuf.GeneratedMessageV3 implements
      // @@protoc_insertion_point(message_implements:grpc.gcp.HandshakerResult)
      HandshakerResultOrBuilder {
  private static final long serialVersionUID = 0L;
    // Use HandshakerResult.newBuilder() to construct.
    private HandshakerResult(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
      super(builder);
    }
    private HandshakerResult() {
      applicationProtocol_ = "";
      recordProtocol_ = "";
      keyData_ = com.google.protobuf.ByteString.EMPTY;
      keepChannelOpen_ = false;
    }

    @java.lang.Override
    public final com.google.protobuf.UnknownFieldSet
    getUnknownFields() {
      return this.unknownFields;
    }
    private HandshakerResult(
        com.google.protobuf.CodedInputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
      this();
      if (extensionRegistry == null) {
        throw new java.lang.NullPointerException();
      }
      int mutable_bitField0_ = 0;
      com.google.protobuf.UnknownFieldSet.Builder unknownFields =
          com.google.protobuf.UnknownFieldSet.newBuilder();
      try {
        boolean done = false;
        while (!done) {
          int tag = input.readTag();
          switch (tag) {
            case 0:
              done = true;
              break;
            default: {
              if (!parseUnknownFieldProto3(
                  input, unknownFields, extensionRegistry, tag)) {
                done = true;
              }
              break;
            }
            case 10: {
              java.lang.String s = input.readStringRequireUtf8();

              applicationProtocol_ = s;
              break;
            }
            case 18: {
              java.lang.String s = input.readStringRequireUtf8();

              recordProtocol_ = s;
              break;
            }
            case 26: {

              keyData_ = input.readBytes();
              break;
            }
            case 34: {
              io.grpc.alts.internal.Handshaker.Identity.Builder subBuilder = null;
              if (peerIdentity_ != null) {
                subBuilder = peerIdentity_.toBuilder();
              }
              peerIdentity_ = input.readMessage(io.grpc.alts.internal.Handshaker.Identity.parser(), extensionRegistry);
              if (subBuilder != null) {
                subBuilder.mergeFrom(peerIdentity_);
                peerIdentity_ = subBuilder.buildPartial();
              }

              break;
            }
            case 42: {
              io.grpc.alts.internal.Handshaker.Identity.Builder subBuilder = null;
              if (localIdentity_ != null) {
                subBuilder = localIdentity_.toBuilder();
              }
              localIdentity_ = input.readMessage(io.grpc.alts.internal.Handshaker.Identity.parser(), extensionRegistry);
              if (subBuilder != null) {
                subBuilder.mergeFrom(localIdentity_);
                localIdentity_ = subBuilder.buildPartial();
              }

              break;
            }
            case 48: {

              keepChannelOpen_ = input.readBool();
              break;
            }
            case 58: {
              io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.Builder subBuilder = null;
              if (peerRpcVersions_ != null) {
                subBuilder = peerRpcVersions_.toBuilder();
              }
              peerRpcVersions_ = input.readMessage(io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.parser(), extensionRegistry);
              if (subBuilder != null) {
                subBuilder.mergeFrom(peerRpcVersions_);
                peerRpcVersions_ = subBuilder.buildPartial();
              }

              break;
            }
          }
        }
      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
        throw e.setUnfinishedMessage(this);
      } catch (java.io.IOException e) {
        throw new com.google.protobuf.InvalidProtocolBufferException(
            e).setUnfinishedMessage(this);
      } finally {
        this.unknownFields = unknownFields.build();
        makeExtensionsImmutable();
      }
    }
    public static final com.google.protobuf.Descriptors.Descriptor
        getDescriptor() {
      return io.grpc.alts.internal.Handshaker.internal_static_grpc_gcp_HandshakerResult_descriptor;
    }

    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
        internalGetFieldAccessorTable() {
      return io.grpc.alts.internal.Handshaker.internal_static_grpc_gcp_HandshakerResult_fieldAccessorTable
          .ensureFieldAccessorsInitialized(
              io.grpc.alts.internal.Handshaker.HandshakerResult.class, io.grpc.alts.internal.Handshaker.HandshakerResult.Builder.class);
    }

    public static final int APPLICATION_PROTOCOL_FIELD_NUMBER = 1;
    private volatile java.lang.Object applicationProtocol_;
    /**
     * <pre>
     * The application protocol negotiated for this connection.
     * </pre>
     *
     * <code>string application_protocol = 1;</code>
     */
    public java.lang.String getApplicationProtocol() {
      java.lang.Object ref = applicationProtocol_;
      if (ref instanceof java.lang.String) {
        return (java.lang.String) ref;
      } else {
        com.google.protobuf.ByteString bs = 
            (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        applicationProtocol_ = s;
        return s;
      }
    }
    /**
     * <pre>
     * The application protocol negotiated for this connection.
     * </pre>
     *
     * <code>string application_protocol = 1;</code>
     */
    public com.google.protobuf.ByteString
        getApplicationProtocolBytes() {
      java.lang.Object ref = applicationProtocol_;
      if (ref instanceof java.lang.String) {
        com.google.protobuf.ByteString b = 
            com.google.protobuf.ByteString.copyFromUtf8(
                (java.lang.String) ref);
        applicationProtocol_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }

    public static final int RECORD_PROTOCOL_FIELD_NUMBER = 2;
    private volatile java.lang.Object recordProtocol_;
    /**
     * <pre>
     * The record protocol negotiated for this connection.
     * </pre>
     *
     * <code>string record_protocol = 2;</code>
     */
    public java.lang.String getRecordProtocol() {
      java.lang.Object ref = recordProtocol_;
      if (ref instanceof java.lang.String) {
        return (java.lang.String) ref;
      } else {
        com.google.protobuf.ByteString bs = 
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      /**
       * <pre>
       * Cryptographic key data. The key data may be more than the key length
       * required for the record protocol, thus the client of the handshaker
       * service needs to truncate the key data into the right key length.
       * </pre>
       *
       * <code>bytes key_data = 3;</code>
       */
      public com.google.protobuf.ByteString getKeyData() {
        return keyData_;
      }
      /**
       * <pre>
       * Cryptographic key data. The key data may be more than the key length
       * required for the record protocol, thus the client of the handshaker
       * service needs to truncate the key data into the right key length.
       * </pre>
       *
       * <code>bytes key_data = 3;</code>
       */
      public Builder setKeyData(com.google.protobuf.ByteString value) {
        if (value == null) {
    throw new NullPointerException();
  }
  
        keyData_ = value;
        onChanged();
        return this;
      }
      /**
       * <pre>
       * Cryptographic key data. The key data may be more than the key length
       * required for the record protocol, thus the client of the handshaker
       * service needs to truncate the key data into the right key length.
       * </pre>
       *
       * <code>bytes key_data = 3;</code>
       */
      public Builder clearKeyData() {
        
        keyData_ = getDefaultInstance().getKeyData();
        onChanged();
        return this;
      }

      private io.grpc.alts.internal.Handshaker.Identity peerIdentity_ = null;
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.Identity, io.grpc.alts.internal.Handshaker.Identity.Builder, io.grpc.alts.internal.Handshaker.IdentityOrBuilder> peerIdentityBuilder_;
      /**
       * <pre>
       * The authenticated identity of the peer.
       * </pre>
       *
       * <code>.grpc.gcp.Identity peer_identity = 4;</code>
       */
      public boolean hasPeerIdentity() {
        return peerIdentityBuilder_ != null || peerIdentity_ != null;
      }
      /**
       * <pre>
       * The authenticated identity of the peer.
       * </pre>
       *
       * <code>.grpc.gcp.Identity peer_identity = 4;</code>
       */
      public io.grpc.alts.internal.Handshaker.Identity getPeerIdentity() {
        if (peerIdentityBuilder_ == null) {
          return peerIdentity_ == null ? io.grpc.alts.internal.Handshaker.Identity.getDefaultInstance() : peerIdentity_;
        } else {
          return peerIdentityBuilder_.getMessage();
        }
      }
      /**
       * <pre>
       * The authenticated identity of the peer.
       * </pre>
       *
       * <code>.grpc.gcp.Identity peer_identity = 4;</code>
       */
      public Builder setPeerIdentity(io.grpc.alts.internal.Handshaker.Identity value) {
        if (peerIdentityBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          peerIdentity_ = value;
          onChanged();
        } else {
          peerIdentityBuilder_.setMessage(value);
        }

        return this;
      }
      /**
       * <pre>
       * The authenticated identity of the peer.
       * </pre>
       *
       * <code>.grpc.gcp.Identity peer_identity = 4;</code>
       */
      public Builder setPeerIdentity(
          io.grpc.alts.internal.Handshaker.Identity.Builder builderForValue) {
        if (peerIdentityBuilder_ == null) {
          peerIdentity_ = builderForValue.build();
          onChanged();
        } else {
          peerIdentityBuilder_.setMessage(builderForValue.build());
        }

        return this;
      }
      /**
       * <pre>
       * The authenticated identity of the peer.
       * </pre>
       *
       * <code>.grpc.gcp.Identity peer_identity = 4;</code>
       */
      public Builder mergePeerIdentity(io.grpc.alts.internal.Handshaker.Identity value) {
        if (peerIdentityBuilder_ == null) {
          if (peerIdentity_ != null) {
            peerIdentity_ =
              io.grpc.alts.internal.Handshaker.Identity.newBuilder(peerIdentity_).mergeFrom(value).buildPartial();
          } else {
            peerIdentity_ = value;
          }
          onChanged();
        } else {
          peerIdentityBuilder_.mergeFrom(value);
        }

        return this;
      }
      /**
       * <pre>
       * The authenticated identity of the peer.
       * </pre>
       *
       * <code>.grpc.gcp.Identity peer_identity = 4;</code>
       */
      public Builder clearPeerIdentity() {
        if (peerIdentityBuilder_ == null) {
          peerIdentity_ = null;
          onChanged();
        } else {
          peerIdentity_ = null;
          peerIdentityBuilder_ = null;
        }

        return this;
      }
      /**
       * <pre>
       * The authenticated identity of the peer.
       * </pre>
       *
       * <code>.grpc.gcp.Identity peer_identity = 4;</code>
       */
      public io.grpc.alts.internal.Handshaker.Identity.Builder getPeerIdentityBuilder() {
        
        onChanged();
        return getPeerIdentityFieldBuilder().getBuilder();
      }
      /**
       * <pre>
       * The authenticated identity of the peer.
       * </pre>
       *
       * <code>.grpc.gcp.Identity peer_identity = 4;</code>
       */
      public io.grpc.alts.internal.Handshaker.IdentityOrBuilder getPeerIdentityOrBuilder() {
        if (peerIdentityBuilder_ != null) {
          return peerIdentityBuilder_.getMessageOrBuilder();
        } else {
          return peerIdentity_ == null ?
              io.grpc.alts.internal.Handshaker.Identity.getDefaultInstance() : peerIdentity_;
        }
      }
      /**
       * <pre>
       * The authenticated identity of the peer.
       * </pre>
       *
       * <code>.grpc.gcp.Identity peer_identity = 4;</code>
       */
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.Identity, io.grpc.alts.internal.Handshaker.Identity.Builder, io.grpc.alts.internal.Handshaker.IdentityOrBuilder> 
          getPeerIdentityFieldBuilder() {
        if (peerIdentityBuilder_ == null) {
          peerIdentityBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
              io.grpc.alts.internal.Handshaker.Identity, io.grpc.alts.internal.Handshaker.Identity.Builder, io.grpc.alts.internal.Handshaker.IdentityOrBuilder>(
                  getPeerIdentity(),
                  getParentForChildren(),
                  isClean());
          peerIdentity_ = null;
        }
        return peerIdentityBuilder_;
      }

      private io.grpc.alts.internal.Handshaker.Identity localIdentity_ = null;
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.Identity, io.grpc.alts.internal.Handshaker.Identity.Builder, io.grpc.alts.internal.Handshaker.IdentityOrBuilder> localIdentityBuilder_;
      /**
       * <pre>
       * The local identity used in the handshake.
       * </pre>
       *
       * <code>.grpc.gcp.Identity local_identity = 5;</code>
       */
      public boolean hasLocalIdentity() {
        return localIdentityBuilder_ != null || localIdentity_ != null;
      }
      /**
       * <pre>
       * The local identity used in the handshake.
       * </pre>
       *
       * <code>.grpc.gcp.Identity local_identity = 5;</code>
       */
      public io.grpc.alts.internal.Handshaker.Identity getLocalIdentity() {
        if (localIdentityBuilder_ == null) {
          return localIdentity_ == null ? io.grpc.alts.internal.Handshaker.Identity.getDefaultInstance() : localIdentity_;
        } else {
          return localIdentityBuilder_.getMessage();
        }
      }
      /**
       * <pre>
       * The local identity used in the handshake.
       * </pre>
       *
       * <code>.grpc.gcp.Identity local_identity = 5;</code>
       */
      public Builder setLocalIdentity(io.grpc.alts.internal.Handshaker.Identity value) {
        if (localIdentityBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          localIdentity_ = value;
          onChanged();
        } else {
          localIdentityBuilder_.setMessage(value);
        }

        return this;
      }
      /**
       * <pre>
       * The local identity used in the handshake.
       * </pre>
       *
       * <code>.grpc.gcp.Identity local_identity = 5;</code>
       */
      public Builder setLocalIdentity(
          io.grpc.alts.internal.Handshaker.Identity.Builder builderForValue) {
        if (localIdentityBuilder_ == null) {
          localIdentity_ = builderForValue.build();
          onChanged();
        } else {
          localIdentityBuilder_.setMessage(builderForValue.build());
        }

        return this;
      }
      /**
       * <pre>
       * The local identity used in the handshake.
       * </pre>
       *
       * <code>.grpc.gcp.Identity local_identity = 5;</code>
       */
      public Builder mergeLocalIdentity(io.grpc.alts.internal.Handshaker.Identity value) {
        if (localIdentityBuilder_ == null) {
          if (localIdentity_ != null) {
            localIdentity_ =
              io.grpc.alts.internal.Handshaker.Identity.newBuilder(localIdentity_).mergeFrom(value).buildPartial();
          } else {
            localIdentity_ = value;
          }
          onChanged();
        } else {
          localIdentityBuilder_.mergeFrom(value);
        }

        return this;
      }
      /**
       * <pre>
       * The local identity used in the handshake.
       * </pre>
       *
       * <code>.grpc.gcp.Identity local_identity = 5;</code>
       */
      public Builder clearLocalIdentity() {
        if (localIdentityBuilder_ == null) {
          localIdentity_ = null;
          onChanged();
        } else {
          localIdentity_ = null;
          localIdentityBuilder_ = null;
        }

        return this;
      }
      /**
       * <pre>
       * The local identity used in the handshake.
       * </pre>
       *
       * <code>.grpc.gcp.Identity local_identity = 5;</code>
       */
      public io.grpc.alts.internal.Handshaker.Identity.Builder getLocalIdentityBuilder() {
        
        onChanged();
        return getLocalIdentityFieldBuilder().getBuilder();
      }
      /**
       * <pre>
       * The local identity used in the handshake.
       * </pre>
       *
       * <code>.grpc.gcp.Identity local_identity = 5;</code>
       */
      public io.grpc.alts.internal.Handshaker.IdentityOrBuilder getLocalIdentityOrBuilder() {
        if (localIdentityBuilder_ != null) {
          return localIdentityBuilder_.getMessageOrBuilder();
        } else {
          return localIdentity_ == null ?
              io.grpc.alts.internal.Handshaker.Identity.getDefaultInstance() : localIdentity_;
        }
      }
      /**
       * <pre>
       * The local identity used in the handshake.
       * </pre>
       *
       * <code>.grpc.gcp.Identity local_identity = 5;</code>
       */
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.Handshaker.Identity, io.grpc.alts.internal.Handshaker.Identity.Builder, io.grpc.alts.internal.Handshaker.IdentityOrBuilder> 
          getLocalIdentityFieldBuilder() {
        if (localIdentityBuilder_ == null) {
          localIdentityBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
              io.grpc.alts.internal.Handshaker.Identity, io.grpc.alts.internal.Handshaker.Identity.Builder, io.grpc.alts.internal.Handshaker.IdentityOrBuilder>(
                  getLocalIdentity(),
                  getParentForChildren(),
                  isClean());
          localIdentity_ = null;
        }
        return localIdentityBuilder_;
      }

      private boolean keepChannelOpen_ ;
      /**
       * <pre>
       * Indicate whether the handshaker service client should keep the channel
       * between the handshaker service open, e.g., in order to handle
       * post-handshake messages in the future.
       * </pre>
       *
       * <code>bool keep_channel_open = 6;</code>
       */
      public boolean getKeepChannelOpen() {
        return keepChannelOpen_;
      }
      /**
       * <pre>
       * Indicate whether the handshaker service client should keep the channel
       * between the handshaker service open, e.g., in order to handle
       * post-handshake messages in the future.
       * </pre>
       *
       * <code>bool keep_channel_open = 6;</code>
       */
      public Builder setKeepChannelOpen(boolean value) {
        
        keepChannelOpen_ = value;
        onChanged();
        return this;
      }
      /**
       * <pre>
       * Indicate whether the handshaker service client should keep the channel
       * between the handshaker service open, e.g., in order to handle
       * post-handshake messages in the future.
       * </pre>
       *
       * <code>bool keep_channel_open = 6;</code>
       */
      public Builder clearKeepChannelOpen() {
        
        keepChannelOpen_ = false;
        onChanged();
        return this;
      }

      private io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions peerRpcVersions_ = null;
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions, io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.Builder, io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersionsOrBuilder> peerRpcVersionsBuilder_;
      /**
       * <pre>
       * The RPC protocol versions supported by the peer.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions peer_rpc_versions = 7;</code>
       */
      public boolean hasPeerRpcVersions() {
        return peerRpcVersionsBuilder_ != null || peerRpcVersions_ != null;
      }
      /**
       * <pre>
       * The RPC protocol versions supported by the peer.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions peer_rpc_versions = 7;</code>
       */
      public io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions getPeerRpcVersions() {
        if (peerRpcVersionsBuilder_ == null) {
          return peerRpcVersions_ == null ? io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.getDefaultInstance() : peerRpcVersions_;
        } else {
          return peerRpcVersionsBuilder_.getMessage();
        }
      }
      /**
       * <pre>
       * The RPC protocol versions supported by the peer.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions peer_rpc_versions = 7;</code>
       */
      public Builder setPeerRpcVersions(io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions value) {
        if (peerRpcVersionsBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          peerRpcVersions_ = value;
          onChanged();
        } else {
          peerRpcVersionsBuilder_.setMessage(value);
        }

        return this;
      }
      /**
       * <pre>
       * The RPC protocol versions supported by the peer.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions peer_rpc_versions = 7;</code>
       */
      public Builder setPeerRpcVersions(
          io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.Builder builderForValue) {
        if (peerRpcVersionsBuilder_ == null) {
          peerRpcVersions_ = builderForValue.build();
          onChanged();
        } else {
          peerRpcVersionsBuilder_.setMessage(builderForValue.build());
        }

        return this;
      }
      /**
       * <pre>
       * The RPC protocol versions supported by the peer.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions peer_rpc_versions = 7;</code>
       */
      public Builder mergePeerRpcVersions(io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions value) {
        if (peerRpcVersionsBuilder_ == null) {
          if (peerRpcVersions_ != null) {
            peerRpcVersions_ =
              io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.newBuilder(peerRpcVersions_).mergeFrom(value).buildPartial();
          } else {
            peerRpcVersions_ = value;
          }
          onChanged();
        } else {
          peerRpcVersionsBuilder_.mergeFrom(value);
        }

        return this;
      }
      /**
       * <pre>
       * The RPC protocol versions supported by the peer.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions peer_rpc_versions = 7;</code>
       */
      public Builder clearPeerRpcVersions() {
        if (peerRpcVersionsBuilder_ == null) {
          peerRpcVersions_ = null;
          onChanged();
        } else {
          peerRpcVersions_ = null;
          peerRpcVersionsBuilder_ = null;
        }

        return this;
      }
      /**
       * <pre>
       * The RPC protocol versions supported by the peer.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions peer_rpc_versions = 7;</code>
       */
      public io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.Builder getPeerRpcVersionsBuilder() {
        
        onChanged();
        return getPeerRpcVersionsFieldBuilder().getBuilder();
      }
      /**
       * <pre>
       * The RPC protocol versions supported by the peer.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions peer_rpc_versions = 7;</code>
       */
      public io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersionsOrBuilder getPeerRpcVersionsOrBuilder() {
        if (peerRpcVersionsBuilder_ != null) {
          return peerRpcVersionsBuilder_.getMessageOrBuilder();
        } else {
          return peerRpcVersions_ == null ?
              io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.getDefaultInstance() : peerRpcVersions_;
        }
      }
      /**
       * <pre>
       * The RPC protocol versions supported by the peer.
       * </pre>
       *
       * <code>.grpc.gcp.RpcProtocolVersions peer_rpc_versions = 7;</code>
       */
      private com.google.protobuf.SingleFieldBuilderV3<
          io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions, io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.Builder, io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersionsOrBuilder> 
          getPeerRpcVersionsFieldBuilder() {
        if (peerRpcVersionsBuilder_ == null) {
          peerRpcVersionsBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
              io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions, io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersions.Builder, io.grpc.alts.internal.TransportSecurityCommon.RpcProtocolVersionsOrBuilder>(
                  getPeerRpcVersions(),
                  getParentForChildren(),
                  isClean());
          peerRpcVersions_ = null;
        }
        return peerRpcVersionsBuilder_;
      }
      public final Builder setUnknownFields(
          final com.google.protobuf.UnknownFieldSet unknownFields) {
        return super.setUnknownFieldsProto3(unknownFields);
      }

      public final Builder mergeUnknownFields(
          final com.google.protobuf.UnknownFieldSet unknownFields) {
        return super.mergeUnknownFields(unknownFields);
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      // @@protoc_insertion_point(builder_scope:grpc.gcp.HandshakerResult)
    }

    // @@protoc_insertion_point(class_scope:grpc.gcp.HandshakerResult)
    private static final io.grpc.alts.internal.Handshaker.HandshakerResult DEFAULT_INSTANCE;
    static {
      DEFAULT_INSTANCE = new io.grpc.alts.internal.Handshaker.HandshakerResult();
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    public static io.grpc.alts.internal.Handshaker.HandshakerResult getDefaultInstance() {
      return DEFAULT_INSTANCE;
    }

    private static final com.google.protobuf.Parser<HandshakerResult>
        PARSER = new com.google.protobuf.AbstractParser<HandshakerResult>() {
      public HandshakerResult parsePartialFrom(
          com.google.protobuf.CodedInputStream input,
          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
          throws com.google.protobuf.InvalidProtocolBufferException {
        return new HandshakerResult(input, extensionRegistry);
      }
    };

    public static com.google.protobuf.Parser<HandshakerResult> parser() {
      return PARSER;
    }

    @java.lang.Override
    public com.google.protobuf.Parser<HandshakerResult> getParserForType() {
      return PARSER;
    }

    public io.grpc.alts.internal.Handshaker.HandshakerResult getDefaultInstanceForType() {
      return DEFAULT_INSTANCE;
    }

  }

  public interface HandshakerStatusOrBuilder extends
      // @@protoc_insertion_point(interface_extends:grpc.gcp.HandshakerStatus)
      com.google.protobuf.MessageOrBuilder {

    /**
     * <pre>
     * The status code. This could be the gRPC status code.
     * </pre>
     *
     * <code>uint32 code = 1;</code>
     */
    int getCode();

    /**
     * <pre>
     * The status details.
     * </pre>
     *
     * <code>string details = 2;</code>
     */
    java.lang.String getDetails();
    /**
     * <pre>
     * The status details.
     * </pre>
     *
     * <code>string details = 2;</code>
     */
    com.google.protobuf.ByteString
        getDetailsBytes();
  }
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   * Protobuf type {@code grpc.gcp.HandshakerStatus}
   */
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      com.google.protobuf.GeneratedMessageV3 implements
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        this.unknownFields = unknownFields.build();
        makeExtensionsImmutable();
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    public static final com.google.protobuf.Descriptors.Descriptor
        getDescriptor() {
      return io.grpc.alts.internal.Handshaker.internal_static_grpc_gcp_HandshakerStatus_descriptor;
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    public static final int CODE_FIELD_NUMBER = 1;
    private int code_;
    /**
     * <pre>
     * The status code. This could be the gRPC status code.
     * </pre>
     *
     * <code>uint32 code = 1;</code>
     */
    public int getCode() {
      return code_;
    }

    public static final int DETAILS_FIELD_NUMBER = 2;
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     * <pre>
     * The status details.
     * </pre>
     *
     * <code>string details = 2;</code>
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     * </pre>
     *
     * <code>string details = 2;</code>
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      java.lang.Object ref = details_;
      if (ref instanceof java.lang.String) {
        com.google.protobuf.ByteString b = 
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