| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.internal.net.ipsec.ike.message; |
| |
| import com.android.internal.net.eap.message.EapMessage; |
| |
| import java.nio.ByteBuffer; |
| |
| /** |
| * IkeEapPayload represents an EAP payload. |
| * |
| * @see <a href="https://tools.ietf.org/html/rfc7296#section-3.8">RFC 7296, Internet Key Exchange |
| * Protocol Version 2 (IKEv2)</a> |
| * @see <a href="https://tools.ietf.org/html/rfc3748#section-4">RFC 3748, Extensible Authentication |
| * Protocol (EAP)</a> |
| */ |
| public final class IkeEapPayload extends IkePayload { |
| public final byte[] eapMessage; |
| |
| /** |
| * Construct an instance of IkeEapPayload from a decoded inbound IKE packet. |
| * |
| * <p>Any syntax errors contained in the eapMessage will be handled in {@link EapMessage}. |
| * |
| * @param isCritical indicates if this payload is critical. Ignored in supported payload as |
| * instructed by the RFC 7296. |
| * @param eapMessage byte-array encoded EapMessage |
| */ |
| IkeEapPayload(boolean isCritical, byte[] eapMessage) { |
| super(PAYLOAD_TYPE_EAP, isCritical); |
| |
| this.eapMessage = eapMessage; |
| } |
| |
| /** |
| * Construct an instance of IkeEapPayload for an outbound IKE EAP message. |
| * |
| * <p>This eapMessage is constructed in the IKE session and is guaranteed to have valid syntax. |
| * |
| * @param eapMessage byte-array encoded EapMessage |
| */ |
| public IkeEapPayload(byte[] eapMessage) { |
| super(PAYLOAD_TYPE_EAP, false); |
| |
| this.eapMessage = eapMessage; |
| } |
| |
| /** |
| * Encode EAP Payload to ByteBuffer. |
| * |
| * @param nextPayload type of payload that follows this payload. |
| * @param byteBuffer destination ByteBuffer that stores encoded payload. |
| */ |
| @Override |
| protected void encodeToByteBuffer(@PayloadType int nextPayload, ByteBuffer byteBuffer) { |
| encodePayloadHeaderToByteBuffer(nextPayload, getPayloadLength(), byteBuffer); |
| byteBuffer.put(eapMessage); |
| } |
| |
| /** |
| * Get entire payload length. |
| * |
| * @return entire payload length. |
| */ |
| @Override |
| protected int getPayloadLength() { |
| return GENERIC_HEADER_LENGTH + eapMessage.length; |
| } |
| |
| /** |
| * Return the payload type as a String. |
| * |
| * @return the payload type as a String. |
| */ |
| @Override |
| public String getTypeString() { |
| return "EAP"; |
| } |
| } |