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/*
* 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.ike.ikev2.message;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import com.android.ike.TestUtils;
import com.android.ike.ikev2.exceptions.InvalidMajorVersionException;
import com.android.ike.ikev2.exceptions.InvalidSyntaxException;
import org.junit.Test;
import java.nio.ByteBuffer;
public final class IkeHeaderTest {
private static final String IKE_HEADER_HEX_STRING =
"8f54bf6d8b48e6e10000000000000000212022080000000000000150";
private static final String IKE_SA_INIT_RAW_PACKET =
"8f54bf6d8b48e6e100000000000000002120220800000000"
+ "00000150220000300000002c010100040300000c0100000c"
+ "800e00800300000803000002030000080400000200000008"
+ "020000022800008800020000b4a2faf4bb54878ae21d6385"
+ "12ece55d9236fc5046ab6cef82220f421f3ce6361faf3656"
+ "4ecb6d28798a94aad7b2b4b603ddeaaa5630adb9ece8ac37"
+ "534036040610ebdd92f46bef84f0be7db860351843858f8a"
+ "cf87056e272377f70c9f2d81e29c7b0ce4f291a3a72476bb"
+ "0b278fd4b7b0a4c26bbeb08214c707137607958729000024"
+ "c39b7f368f4681b89fa9b7be6465abd7c5f68b6ed5d3b4c7"
+ "2cb4240eb5c464122900001c00004004e54f73b7d83f6beb"
+ "881eab2051d8663f421d10b02b00001c00004005d915368c"
+ "a036004cb578ae3e3fb268509aeab1900000002069936922"
+ "8741c6d4ca094c93e242c9de19e7b7c60000000500000500";
private static final String IKE_INITIATOR_SPI = "8f54bf6d8b48e6e1";
private static final String IKE_RESPODNER_SPI = "0000000000000000";
@IkePayload.PayloadType
private static final byte IKE_FIRST_PAYLOAD_TYPE = IkePayload.PAYLOAD_TYPE_SA;
private static final byte IKE_MAJOR_VERSION = 2;
private static final byte IKE_MINOR_VERSION = 0;
@IkeHeader.ExchangeType
private static final int IKE_EXCHANGE_TYPE = IkeHeader.EXCHANGE_TYPE_IKE_SA_INIT;
private static final int IKE_MSG_ID = 0;
private static final int IKE_MSG_LENGTH = 336;
private static final int IKE_MSG_BODY_LENGTH = IKE_MSG_LENGTH - IkeHeader.IKE_HEADER_LENGTH;
// Byte offsets of version field in IKE message header.
private static final int VERSION_OFFSET = 17;
// Byte offsets of exchange type in IKE message header.
private static final int EXCHANGE_TYPE_OFFSET = 18;
// Byte offsets of message length in IKE message header.
private static final int MESSAGE_LENGTH_OFFSET = 24;
@Test
public void testDecodeIkeHeader() throws Exception {
byte[] inputPacket = TestUtils.hexStringToByteArray(IKE_SA_INIT_RAW_PACKET);
IkeHeader header = new IkeHeader(inputPacket);
assertEquals(IKE_MSG_LENGTH, inputPacket.length);
long initSpi = Long.parseUnsignedLong(IKE_INITIATOR_SPI, 16);
assertEquals(initSpi, header.ikeInitiatorSpi);
long respSpi = Long.parseUnsignedLong(IKE_RESPODNER_SPI, 16);
assertEquals(respSpi, header.ikeResponderSpi);
assertEquals(IKE_FIRST_PAYLOAD_TYPE, header.nextPayloadType);
assertEquals(IKE_MAJOR_VERSION, header.majorVersion);
assertEquals(IKE_MINOR_VERSION, header.minorVersion);
assertEquals(IKE_EXCHANGE_TYPE, header.exchangeType);
assertFalse(header.isResponseMsg);
assertTrue(header.fromIkeInitiator);
assertEquals(IKE_MSG_ID, header.messageId);
assertEquals(IKE_MSG_LENGTH, header.getInboundMessageLength());
}
@Test
public void testDecodeIkeHeaderWithInvalidMajorVersion() throws Exception {
byte[] inputPacket = TestUtils.hexStringToByteArray(IKE_SA_INIT_RAW_PACKET);
// Set major version 3.
inputPacket[VERSION_OFFSET] = (byte) 0x30;
// Set Exchange type 0
inputPacket[EXCHANGE_TYPE_OFFSET] = (byte) 0x00;
InvalidMajorVersionException exception =
IkeTestUtils.decodeAndVerifyUnprotectedErrorMsg(
inputPacket, InvalidMajorVersionException.class);
assertEquals(3, exception.getMajorVerion());
}
@Test
public void testDecodeIkeHeaderWithInvalidExchangeType() throws Exception {
byte[] inputPacket = TestUtils.hexStringToByteArray(IKE_SA_INIT_RAW_PACKET);
// Set Exchange type 0
inputPacket[EXCHANGE_TYPE_OFFSET] = (byte) 0x00;
IkeTestUtils.decodeAndVerifyUnprotectedErrorMsg(inputPacket, InvalidSyntaxException.class);
}
@Test
public void testDecodeIkeHeaderWithInvalidPacketLength() throws Exception {
byte[] inputPacket = TestUtils.hexStringToByteArray(IKE_SA_INIT_RAW_PACKET);
// Set Exchange type 0
inputPacket[MESSAGE_LENGTH_OFFSET] = (byte) 0x01;
IkeTestUtils.decodeAndVerifyUnprotectedErrorMsg(inputPacket, InvalidSyntaxException.class);
}
@Test
public void testEncodeIkeHeader() throws Exception {
byte[] inputPacket = TestUtils.hexStringToByteArray(IKE_SA_INIT_RAW_PACKET);
IkeHeader header = new IkeHeader(inputPacket);
ByteBuffer byteBuffer = ByteBuffer.allocate(IkeHeader.IKE_HEADER_LENGTH);
header.encodeToByteBuffer(byteBuffer, IKE_MSG_BODY_LENGTH);
byte[] expectedPacket = TestUtils.hexStringToByteArray(IKE_HEADER_HEX_STRING);
assertArrayEquals(expectedPacket, byteBuffer.array());
}
}
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