1 /*
2  * Copyright (C) 2015 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include <keymaster/km_openssl/hmac.h>
18 
19 #include <gtest/gtest.h>
20 #include <string.h>
21 
22 #include "android_keymaster_test_utils.h"
23 
24 using std::string;
25 
26 namespace keymaster {
27 
28 namespace test {
29 
30 struct HmacTest {
31     const char* data;
32     const char* key;
33     uint8_t digest[32];
34 };
35 
36 static const HmacTest kHmacTests[] = {
37     {
38         "Test Using Larger Than Block-Size Key - Hash Key First",
39         "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
40         "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
41         "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
42         "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
43         {
44             0x60, 0xe4, 0x31, 0x59, 0x1e, 0xe0, 0xb6, 0x7f, 0x0d, 0x8a, 0x26, 0xaa, 0xcb, 0xf5,
45             0xb7, 0x7f, 0x8e, 0x0b, 0xc6, 0x21, 0x37, 0x28, 0xc5, 0x14, 0x05, 0x46, 0x04, 0x0f,
46             0x0e, 0xe3, 0x7f, 0x54,
47         },
48     },
49     {
50         "The test message for the MD2, MD5, and SHA-1 hashing algorithms.",
51         "46697265666f7820616e64205468756e64657242697264206172652061776573"
52         "6f6d652100",
53         {
54             0x05, 0x75, 0x9a, 0x9e, 0x70, 0x5e, 0xe7, 0x44, 0xe2, 0x46, 0x4b, 0x92, 0x22, 0x14,
55             0x22, 0xe0, 0x1b, 0x92, 0x8a, 0x0c, 0xfe, 0xf5, 0x49, 0xe9, 0xa7, 0x1b, 0x56, 0x7d,
56             0x1d, 0x29, 0x40, 0x48,
57         },
58     },
59 };
60 
61 TEST(HmacTest, SHA256) {
62     for (size_t i = 0; i < 2; i++) {
63         const HmacTest& test(kHmacTests[i]);
64 
65         HmacSha256 hmac;
66         const string key = hex2str(test.key);
67         Buffer key_buffer(key.data(), key.size());
68         ASSERT_TRUE(hmac.Init(key_buffer));
69 
70         uint8_t digest_copy[sizeof(test.digest)];
71         memcpy(digest_copy, test.digest, sizeof(test.digest));
72         Buffer digest_buffer(reinterpret_cast<uint8_t*>(digest_copy), sizeof(digest_copy));
73 
74         Buffer data_buffer(test.data, strlen(test.data));
75         EXPECT_TRUE(hmac.Verify(data_buffer, digest_buffer));
76 
77         digest_copy[16] ^= 0x80;
78         digest_buffer.Reinitialize(reinterpret_cast<uint8_t*>(digest_copy), sizeof(digest_copy));
79         EXPECT_FALSE(hmac.Verify(data_buffer, digest_buffer));
80     }
81 }
82 
83 }  // namespace test
84 }  // namespace keymaster
85