| /* |
| * Copyright (c) 2020, Azul Systems, Inc. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package com.sun.jndi.ldap.sasl; |
| |
| import javax.naming.NamingException; |
| import javax.security.sasl.SaslException; |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| import java.security.cert.CertificateEncodingException; |
| import java.security.cert.X509Certificate; |
| import java.util.Arrays; |
| import java.util.Hashtable; |
| |
| /** |
| * This class implements the Channel Binding for TLS as defined in |
| * <a href="https://www.ietf.org/rfc/rfc5929.txt"> |
| * Channel Bindings for TLS</a> |
| * |
| * Format of the Channel Binding data is also defined in |
| * <a href="https://www.ietf.org/rfc/rfc5056.txt"> |
| * On the Use of Channel Bindings to Secure Channels</a> |
| * section 2.1. |
| * |
| */ |
| |
| public class TlsChannelBinding { |
| |
| // TLS channel binding type property |
| public static final String CHANNEL_BINDING_TYPE = |
| "com.sun.jndi.ldap.tls.cbtype"; |
| |
| // internal TLS channel binding property |
| public static final String CHANNEL_BINDING = |
| "jdk.internal.sasl.tlschannelbinding"; |
| |
| public enum TlsChannelBindingType { |
| |
| /** |
| * Channel binding on the basis of TLS Finished message. |
| * TLS_UNIQUE is defined by RFC 5929 but is not supported |
| * by the current LDAP stack. |
| */ |
| TLS_UNIQUE("tls-unique"), |
| |
| /** |
| * Channel binding on the basis of TLS server certificate. |
| */ |
| TLS_SERVER_END_POINT("tls-server-end-point"); |
| |
| public String getName() { |
| return name; |
| } |
| |
| final private String name; |
| TlsChannelBindingType(String name) { |
| this.name = name; |
| } |
| } |
| |
| /** |
| * Parse value of "com.sun.jndi.ldap.tls.cbtype" property |
| * @param cbType |
| * @return TLS Channel Binding type or null if |
| * "com.sun.jndi.ldap.tls.cbtype" property has not been set. |
| * @throws NamingException |
| */ |
| public static TlsChannelBindingType parseType(String cbType) throws NamingException { |
| if (cbType != null) { |
| if (cbType.equals(TlsChannelBindingType.TLS_SERVER_END_POINT.getName())) { |
| return TlsChannelBindingType.TLS_SERVER_END_POINT; |
| } else { |
| throw new NamingException("Illegal value for " + |
| CHANNEL_BINDING_TYPE + " property."); |
| } |
| } |
| return null; |
| } |
| |
| final private TlsChannelBindingType cbType; |
| final private byte[] cbData; |
| |
| /** |
| * Construct tls-server-end-point Channel Binding data |
| * @param serverCertificate |
| * @throws SaslException |
| */ |
| public static TlsChannelBinding create(X509Certificate serverCertificate) throws SaslException { |
| try { |
| final byte[] prefix = |
| TlsChannelBindingType.TLS_SERVER_END_POINT.getName().concat(":").getBytes(); |
| String hashAlg = serverCertificate.getSigAlgName(). |
| replace("SHA", "SHA-").toUpperCase(); |
| int ind = hashAlg.indexOf("WITH"); |
| if (ind > 0) { |
| hashAlg = hashAlg.substring(0, ind); |
| if (hashAlg.equals("MD5") || hashAlg.equals("SHA-1")) { |
| hashAlg = "SHA-256"; |
| } |
| } else { |
| hashAlg = "SHA-256"; |
| } |
| MessageDigest md = MessageDigest.getInstance(hashAlg); |
| byte[] hash = md.digest(serverCertificate.getEncoded()); |
| byte[] cbData = Arrays.copyOf(prefix, prefix.length + hash.length ); |
| System.arraycopy(hash, 0, cbData, prefix.length, hash.length); |
| return new TlsChannelBinding(TlsChannelBindingType.TLS_SERVER_END_POINT, cbData); |
| } catch (NoSuchAlgorithmException | CertificateEncodingException e) { |
| throw new SaslException("Cannot create TLS channel binding data", e); |
| } |
| } |
| |
| private TlsChannelBinding(TlsChannelBindingType cbType, byte[] cbData) { |
| this.cbType = cbType; |
| this.cbData = cbData; |
| } |
| |
| public TlsChannelBindingType getType() { |
| return cbType; |
| } |
| |
| public byte[] getData() { |
| return cbData; |
| } |
| } |