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      1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com)
      2  * All rights reserved.
      3  *
      4  * This package is an SSL implementation written
      5  * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 
     69 
     70 static const EVP_MD *GetDigest(const std::string &name) {
     71   if (name == "MD5") {
     72     return EVP_md5();
     73   } else if (name == "SHA1") {
     74     return EVP_sha1();
     75   } else if (name == "SHA224") {
     76     return EVP_sha224();
     77   } else if (name == "SHA256") {
     78     return EVP_sha256();
     79   } else if (name == "SHA384") {
     80     return EVP_sha384();
     81   } else if (name == "SHA512") {
     82     return EVP_sha512();
     83   }
     84   return nullptr;
     85 }
     86 
     87 TEST(HMACTest, TestVectors) {
     88   FileTestGTest("crypto/hmac_extra/hmac_tests.txt", [](FileTest *t) {
     89     std::string digest_str;
     90     ASSERT_TRUE(t->GetAttribute(&digest_str, "HMAC"));
     91     const EVP_MD *digest = GetDigest(digest_str);
     92     ASSERT_TRUE(digest) << "Unknown digest: " << digest_str;
     93 
     94     std::vector<uint8_t> key, input, output;
     95     ASSERT_TRUE(t->GetBytes(&key, "Key"));
     96     ASSERT_TRUE(t->GetBytes(&input, "Input"));
     97     ASSERT_TRUE(t->GetBytes(&output, "Output"));
     98     ASSERT_EQ(EVP_MD_size(digest), output.size());
     99 
    100     // Test using the one-shot API.
    101     unsigned expected_mac_len = EVP_MD_size(digest);
    102     std::unique_ptr<uint8_t[]> mac(new uint8_t[expected_mac_len]);
    103     unsigned mac_len;
    104     ASSERT_TRUE(HMAC(digest, key.data(), key.size(), input.data(), input.size(),
    105                      mac.get(), &mac_len));
    106     EXPECT_EQ(Bytes(output), Bytes(mac.get(), mac_len));
    107 
    108     // Test using HMAC_CTX.
    109     bssl::ScopedHMAC_CTX ctx;
    110     ASSERT_TRUE(
    111         HMAC_Init_ex(ctx.get(), key.data(), key.size(), digest, nullptr));
    112     ASSERT_TRUE(HMAC_Update(ctx.get(), input.data(), input.size()));
    113     ASSERT_TRUE(HMAC_Final(ctx.get(), mac.get(), &mac_len));
    114     EXPECT_EQ(Bytes(output), Bytes(mac.get(), mac_len));
    115 
    116     // Test that an HMAC_CTX may be reset with the same key.
    117     ASSERT_TRUE(HMAC_Init_ex(ctx.get(), nullptr, 0, digest, nullptr));
    118     ASSERT_TRUE(HMAC_Update(ctx.get(), input.data(), input.size()));
    119     ASSERT_TRUE(HMAC_Final(ctx.get(), mac.get(), &mac_len));
    120     EXPECT_EQ(Bytes(output), Bytes(mac.get(), mac_len));
    121 
    122     // Test feeding the input in byte by byte.
    123     ASSERT_TRUE(HMAC_Init_ex(ctx.get(), nullptr, 0, nullptr, nullptr));
    124     for (size_t i = 0; i < input.size(); i++) {
    125       ASSERT_TRUE(HMAC_Update(ctx.get(), &input[i], 1));
    126     }
    127     ASSERT_TRUE(HMAC_Final(ctx.get(), mac.get(), &mac_len));
    128     EXPECT_EQ(Bytes(output), Bytes(mac.get(), mac_len));
    129   });
    130 }
    131