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/*
* Copyright (C) 2019 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 static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
import android.net.ipsec.ike.SaProposal;
import com.android.internal.net.TestUtils;
import com.android.internal.net.ipsec.ike.crypto.IkeMacPrf;
import com.android.internal.net.ipsec.ike.exceptions.AuthenticationFailedException;
import com.android.internal.net.ipsec.ike.message.IkeSaPayload.PrfTransform;
import org.junit.Before;
import org.junit.Test;
import java.nio.ByteBuffer;
import java.util.Arrays;
public final class IkeAuthPskPayloadTest {
private static final String PSK_AUTH_PAYLOAD_HEX_STRING =
"2100001c02000000df7c038aefaaa32d3f44b228b52a332744dfb2c1";
private static final String PSK_AUTH_PAYLOAD_BODY_HEX_STRING =
"02000000df7c038aefaaa32d3f44b228b52a332744dfb2c1";
private static final String PSK_AUTH_PAYLOAD_SIGNATURE_HEX_STRING =
"df7c038aefaaa32d3f44b228b52a332744dfb2c1";
private static final String PSK_IKE_INIT_REQUEST_HEX_STRING =
"5f54bf6d8b48e6e1000000000000000021202208"
+ "0000000000000150220000300000002c01010004"
+ "0300000c0100000c800e00800300000803000002"
+ "0300000804000002000000080200000228000088"
+ "00020000b4a2faf4bb54878ae21d638512ece55d"
+ "9236fc5046ab6cef82220f421f3ce6361faf3656"
+ "4ecb6d28798a94aad7b2b4b603ddeaaa5630adb9"
+ "ece8ac37534036040610ebdd92f46bef84f0be7d"
+ "b860351843858f8acf87056e272377f70c9f2d81"
+ "e29c7b0ce4f291a3a72476bb0b278fd4b7b0a4c2"
+ "6bbeb08214c707137607958729000024c39b7f36"
+ "8f4681b89fa9b7be6465abd7c5f68b6ed5d3b4c7"
+ "2cb4240eb5c464122900001c00004004e54f73b7"
+ "d83f6beb881eab2051d8663f421d10b02b00001c"
+ "00004005d915368ca036004cb578ae3e3fb26850"
+ "9aeab19000000020699369228741c6d4ca094c93"
+ "e242c9de19e7b7c60000000500000500";
private static final String PSK_NONCE_RESP_HEX_STRING =
"9756112ca539f5c25abacc7ee92b73091942a9c06950f98848f1af1694c4ddff";
private static final String PSK_ID_INITIATOR_PAYLOAD_HEX_STRING = "010000000a50500d";
private static final String PSK_HEX_STRING = "6A756E69706572313233";
private static final String PSK_SKP_HEX_STRING = "094787780EE466E2CB049FA327B43908BC57E485";
private static final byte[] PSK = TestUtils.hexStringToByteArray(PSK_HEX_STRING);
private static final byte[] IKE_INIT_REQUEST =
TestUtils.hexStringToByteArray(PSK_IKE_INIT_REQUEST_HEX_STRING);
private static final byte[] NONCE = TestUtils.hexStringToByteArray(PSK_NONCE_RESP_HEX_STRING);
private static final byte[] ID_PAYLOAD_BODY =
TestUtils.hexStringToByteArray(PSK_ID_INITIATOR_PAYLOAD_HEX_STRING);
private static final byte[] PRF_KEY = TestUtils.hexStringToByteArray(PSK_SKP_HEX_STRING);
private static final byte[] SIGNATURE =
TestUtils.hexStringToByteArray(PSK_AUTH_PAYLOAD_SIGNATURE_HEX_STRING);
private IkeMacPrf mIkeHmacSha1Prf;
@Before
public void setUp() throws Exception {
mIkeHmacSha1Prf =
IkeMacPrf.create(
new PrfTransform(SaProposal.PSEUDORANDOM_FUNCTION_HMAC_SHA1),
IkeMessage.getSecurityProvider());
}
@Test
public void testBuildOutboundIkeAuthPskPayload() throws Exception {
IkeAuthPskPayload payload =
new IkeAuthPskPayload(
PSK, IKE_INIT_REQUEST, NONCE, ID_PAYLOAD_BODY, mIkeHmacSha1Prf, PRF_KEY);
assertEquals(IkeAuthPayload.AUTH_METHOD_PRE_SHARED_KEY, payload.authMethod);
assertArrayEquals(SIGNATURE, payload.signature);
// Verify payload length
int payloadLength = payload.getPayloadLength();
byte[] expectedPayload = TestUtils.hexStringToByteArray(PSK_AUTH_PAYLOAD_HEX_STRING);
assertEquals(expectedPayload.length, payloadLength);
// Verify encoding
ByteBuffer byteBuffer = ByteBuffer.allocate(payloadLength);
payload.encodeToByteBuffer(IkePayload.PAYLOAD_TYPE_SA, byteBuffer);
assertArrayEquals(expectedPayload, byteBuffer.array());
}
private IkeAuthPskPayload buildPskPayload() throws Exception {
byte[] payloadBody = TestUtils.hexStringToByteArray(PSK_AUTH_PAYLOAD_BODY_HEX_STRING);
IkeAuthPskPayload pskPayload =
(IkeAuthPskPayload) IkeAuthPayload.getIkeAuthPayload(false, payloadBody);
return pskPayload;
}
@Test
public void testDecodeIkeAuthPskPayload() throws Exception {
IkeAuthPskPayload pskPayload = buildPskPayload();
assertArrayEquals(SIGNATURE, pskPayload.signature);
}
@Test
public void testVerifyReceivedSignature() throws Exception {
IkeAuthPskPayload pskPayload = buildPskPayload();
pskPayload.verifyInboundSignature(
PSK, IKE_INIT_REQUEST, NONCE, ID_PAYLOAD_BODY, mIkeHmacSha1Prf, PRF_KEY);
}
@Test
public void testVerifyReceivedSignatureFailure() throws Exception {
IkeAuthPskPayload pskPayload = buildPskPayload();
byte[] nonce = Arrays.copyOf(NONCE, NONCE.length);
nonce[0]++;
try {
pskPayload.verifyInboundSignature(
PSK, IKE_INIT_REQUEST, nonce, ID_PAYLOAD_BODY, mIkeHmacSha1Prf, PRF_KEY);
fail("Expected signature verification to have failed due to mismatched signatures.");
} catch (AuthenticationFailedException expected) {
}
}
}
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