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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.fail;
import org.junit.Before;
import org.junit.Test;
import java.nio.ByteBuffer;
import java.security.GeneralSecurityException;
import java.util.Arrays;
import javax.crypto.Cipher;
import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
public final class IkeSkPayloadTest {
private static final String IKE_AUTH_INIT_REQUEST_HEX_STRING =
"5f54bf6d8b48e6e1909232b3d1edcb5c2e20230800000001000000ec"
+ "230000d0b9132b7bb9f658dfdc648e5017a6322a030c316c"
+ "e55f365760d46426ce5cfc78bd1ed9abff63eb9594c1bd58"
+ "46de333ecd3ea2b705d18293b130395300ba92a351041345"
+ "0a10525cea51b2753b4e92b081fd78d995659a98f742278f"
+ "f9b8fd3e21554865c15c79a5134d66b2744966089e416c60"
+ "a274e44a9a3f084eb02f3bdce1e7de9de8d9a62773ab563b"
+ "9a69ba1db03c752acb6136452b8a86c41addb4210d68c423"
+ "efed80e26edca5fa3fe5d0a5ca9375ce332c474b93fb1fa3"
+ "59eb4e81ae6e0f22abdad69ba8007d50";
private static final String IKE_AUTH_INIT_REQUEST_DECRYPTED_BODY_HEX_STRING =
"2400000c010000000a50500d2700000c010000000a505050"
+ "2100001c02000000df7c038aefaaa32d3f44b228b52a3327"
+ "44dfb2c12c00002c00000028010304032ad4c0a20300000c"
+ "0100000c800e008003000008030000020000000805000000"
+ "2d00001801000000070000100000ffff00000000ffffffff"
+ "2900001801000000070000100000ffff00000000ffffffff"
+ "29000008000040000000000c0000400100000001";
private static final String ENCR_KEY_FROM_INIT_TO_RESP = "5cbfd33f75796c0188c4a3a546aec4a1";
private static final String INTE_KEY_FROM_INIT_TO_RESP =
"554fbf5a05b7f511e05a30ce23d874db9ef55e51";
private static final String ENCR_ALGO_AES_CBC = "AES/CBC/NoPadding";
private static final String INTE_ALGO_HMAC_SHA1 = "HmacSHA1";
private static final int CHECKSUM_LEN = 12;
private Cipher mAesCbcDecryptCipher;
private SecretKey mAesCbcDecryptKey;
private Mac mHmacSha1IntegrityMac;
@Before
public void setUp() throws Exception {
mAesCbcDecryptCipher =
Cipher.getInstance(ENCR_ALGO_AES_CBC, IkeMessage.getSecurityProvider());
byte[] decryptKeyBytes = TestUtils.hexStringToByteArray(ENCR_KEY_FROM_INIT_TO_RESP);
mAesCbcDecryptKey = new SecretKeySpec(decryptKeyBytes, ENCR_ALGO_AES_CBC);
mHmacSha1IntegrityMac =
Mac.getInstance(INTE_ALGO_HMAC_SHA1, IkeMessage.getSecurityProvider());
byte[] integrityKeyBytes = TestUtils.hexStringToByteArray(INTE_KEY_FROM_INIT_TO_RESP);
SecretKeySpec integrityKey = new SecretKeySpec(integrityKeyBytes, INTE_ALGO_HMAC_SHA1);
mHmacSha1IntegrityMac.init(integrityKey);
}
@Test
public void testAuthenticateAndDecryptMessage() throws Exception {
byte[] message = TestUtils.hexStringToByteArray(IKE_AUTH_INIT_REQUEST_HEX_STRING);
IkeSkPayload payload =
IkePayloadFactory.getIkeSkPayload(
message,
mHmacSha1IntegrityMac,
CHECKSUM_LEN,
mAesCbcDecryptCipher,
mAesCbcDecryptKey)
.first;
byte[] expectedPlaintext =
TestUtils.hexStringToByteArray(IKE_AUTH_INIT_REQUEST_DECRYPTED_BODY_HEX_STRING);
assertArrayEquals(expectedPlaintext, payload.getUnencryptedPayloads());
}
@Test
public void testThrowExceptionForInvalidChecksum() throws Exception {
byte[] message = TestUtils.hexStringToByteArray(IKE_AUTH_INIT_REQUEST_HEX_STRING);
// Change last bit of checksum.
message[message.length - 1]++;
try {
IkePayloadFactory.getIkeSkPayload(
message,
mHmacSha1IntegrityMac,
CHECKSUM_LEN,
mAesCbcDecryptCipher,
mAesCbcDecryptKey);
fail("Expected GeneralSecurityException: Invalid checksum.");
} catch (GeneralSecurityException expected) {
}
}
@Test
public void testEncode() throws Exception {
byte[] message = TestUtils.hexStringToByteArray(IKE_AUTH_INIT_REQUEST_HEX_STRING);
byte[] payloadBytes =
Arrays.copyOfRange(message, IkeHeader.IKE_HEADER_LENGTH, message.length);
IkeSkPayload payload =
IkePayloadFactory.getIkeSkPayload(
message,
mHmacSha1IntegrityMac,
CHECKSUM_LEN,
mAesCbcDecryptCipher,
mAesCbcDecryptKey)
.first;
int payloadLength = payload.getPayloadLength();
ByteBuffer buffer = ByteBuffer.allocate(payloadLength);
payload.encodeToByteBuffer(IkePayload.PAYLOAD_TYPE_ID_INITIATOR, buffer);
assertArrayEquals(payloadBytes, buffer.array());
}
}
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