1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57 #include <memory>
58 #include <string>
59 #include <vector>
60
61 #include <gtest/gtest.h>
62
63 #include <openssl/digest.h>
64 #include <openssl/hmac.h>
65
66 #include "../test/file_test.h"
67 #include "../test/test_util.h"
68 #include "../test/wycheproof_util.h"
69
70
GetDigest(const std::string & name)71 static const EVP_MD *GetDigest(const std::string &name) {
72 if (name == "MD5") {
73 return EVP_md5();
74 } else if (name == "SHA1") {
75 return EVP_sha1();
76 } else if (name == "SHA224") {
77 return EVP_sha224();
78 } else if (name == "SHA256") {
79 return EVP_sha256();
80 } else if (name == "SHA384") {
81 return EVP_sha384();
82 } else if (name == "SHA512") {
83 return EVP_sha512();
84 }
85 return nullptr;
86 }
87
TEST(HMACTest,TestVectors)88 TEST(HMACTest, TestVectors) {
89 FileTestGTest("crypto/hmac_extra/hmac_tests.txt", [](FileTest *t) {
90 std::string digest_str;
91 ASSERT_TRUE(t->GetAttribute(&digest_str, "HMAC"));
92 const EVP_MD *digest = GetDigest(digest_str);
93 ASSERT_TRUE(digest) << "Unknown digest: " << digest_str;
94
95 std::vector<uint8_t> key, input, output;
96 ASSERT_TRUE(t->GetBytes(&key, "Key"));
97 ASSERT_TRUE(t->GetBytes(&input, "Input"));
98 ASSERT_TRUE(t->GetBytes(&output, "Output"));
99 ASSERT_EQ(EVP_MD_size(digest), output.size());
100
101 // Test using the one-shot API.
102 unsigned expected_mac_len = EVP_MD_size(digest);
103 std::unique_ptr<uint8_t[]> mac(new uint8_t[expected_mac_len]);
104 unsigned mac_len;
105 ASSERT_TRUE(HMAC(digest, key.data(), key.size(), input.data(), input.size(),
106 mac.get(), &mac_len));
107 EXPECT_EQ(Bytes(output), Bytes(mac.get(), mac_len));
108
109 // Test using HMAC_CTX.
110 bssl::ScopedHMAC_CTX ctx;
111 ASSERT_TRUE(
112 HMAC_Init_ex(ctx.get(), key.data(), key.size(), digest, nullptr));
113 ASSERT_TRUE(HMAC_Update(ctx.get(), input.data(), input.size()));
114 ASSERT_TRUE(HMAC_Final(ctx.get(), mac.get(), &mac_len));
115 EXPECT_EQ(Bytes(output), Bytes(mac.get(), mac_len));
116
117 // Test that an HMAC_CTX may be reset with the same key.
118 ASSERT_TRUE(HMAC_Init_ex(ctx.get(), nullptr, 0, digest, nullptr));
119 ASSERT_TRUE(HMAC_Update(ctx.get(), input.data(), input.size()));
120 ASSERT_TRUE(HMAC_Final(ctx.get(), mac.get(), &mac_len));
121 EXPECT_EQ(Bytes(output), Bytes(mac.get(), mac_len));
122
123 // Test feeding the input in byte by byte.
124 ASSERT_TRUE(HMAC_Init_ex(ctx.get(), nullptr, 0, nullptr, nullptr));
125 for (size_t i = 0; i < input.size(); i++) {
126 ASSERT_TRUE(HMAC_Update(ctx.get(), &input[i], 1));
127 }
128 ASSERT_TRUE(HMAC_Final(ctx.get(), mac.get(), &mac_len));
129 EXPECT_EQ(Bytes(output), Bytes(mac.get(), mac_len));
130 });
131 }
132
RunWycheproofTest(const char * path,const EVP_MD * md)133 static void RunWycheproofTest(const char *path, const EVP_MD *md) {
134 SCOPED_TRACE(path);
135 FileTestGTest(path, [&](FileTest *t) {
136 t->IgnoreInstruction("keySize");
137 t->IgnoreInstruction("tagSize");
138 std::vector<uint8_t> key, msg, tag;
139 ASSERT_TRUE(t->GetBytes(&key, "key"));
140 ASSERT_TRUE(t->GetBytes(&msg, "msg"));
141 ASSERT_TRUE(t->GetBytes(&tag, "tag"));
142 WycheproofResult result;
143 ASSERT_TRUE(GetWycheproofResult(t, &result));
144
145 if (!result.IsValid()) {
146 // Wycheproof tests assume the HMAC implementation checks the MAC. Ours
147 // simply computes the HMAC, so skip the tests with invalid outputs.
148 return;
149 }
150
151 uint8_t out[EVP_MAX_MD_SIZE];
152 unsigned out_len;
153 ASSERT_TRUE(HMAC(md, key.data(), key.size(), msg.data(), msg.size(), out,
154 &out_len));
155 // Wycheproof tests truncate the tags down to |tagSize|.
156 ASSERT_LE(tag.size(), out_len);
157 EXPECT_EQ(Bytes(out, tag.size()), Bytes(tag));
158 });
159 }
160
TEST(HMACTest,WycheproofSHA1)161 TEST(HMACTest, WycheproofSHA1) {
162 RunWycheproofTest("third_party/wycheproof_testvectors/hmac_sha1_test.txt",
163 EVP_sha1());
164 }
165
TEST(HMACTest,WycheproofSHA224)166 TEST(HMACTest, WycheproofSHA224) {
167 RunWycheproofTest("third_party/wycheproof_testvectors/hmac_sha224_test.txt",
168 EVP_sha224());
169 }
170
TEST(HMACTest,WycheproofSHA256)171 TEST(HMACTest, WycheproofSHA256) {
172 RunWycheproofTest("third_party/wycheproof_testvectors/hmac_sha256_test.txt",
173 EVP_sha256());
174 }
175
TEST(HMACTest,WycheproofSHA384)176 TEST(HMACTest, WycheproofSHA384) {
177 RunWycheproofTest("third_party/wycheproof_testvectors/hmac_sha384_test.txt",
178 EVP_sha384());
179 }
180
TEST(HMACTest,WycheproofSHA512)181 TEST(HMACTest, WycheproofSHA512) {
182 RunWycheproofTest("third_party/wycheproof_testvectors/hmac_sha512_test.txt",
183 EVP_sha512());
184 }
185