| // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "crypto/hkdf.h" |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include <string> |
| |
| #include "base/macros.h" |
| #include "base/strings/string_number_conversions.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| using crypto::HKDF; |
| |
| namespace test { |
| namespace { |
| |
| struct HKDFTest { |
| const char* key_hex; |
| const char* salt_hex; |
| const char* info_hex; |
| const char* output_hex; |
| }; |
| |
| // These test cases are taken from |
| // https://tools.ietf.org/html/rfc5869#appendix-A. |
| static const HKDFTest kHKDFTests[] = {{ |
| "0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b", |
| "000102030405060708090a0b0c", |
| "f0f1f2f3f4f5f6f7f8f9", |
| "3cb25f25faacd57a90434f64d0362f2a2d2d0a90cf1a5a4c5db02d56ecc4c5bf34007208d5" |
| "b887185865", |
| }, { |
| "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f2021222324" |
| "25262728292a2b2c2d2e2f303132333435363738393a3b3c3d3e3f40414243444546474849" |
| "4a4b4c4d4e4f", |
| "606162636465666768696a6b6c6d6e6f707172737475767778797a7b7c7d7e7f8081828384" |
| "85868788898a8b8c8d8e8f909192939495969798999a9b9c9d9e9fa0a1a2a3a4a5a6a7a8a9" |
| "aaabacadaeaf", |
| "b0b1b2b3b4b5b6b7b8b9babbbcbdbebfc0c1c2c3c4c5c6c7c8c9cacbcccdcecfd0d1d2d3d4" |
| "d5d6d7d8d9dadbdcdddedfe0e1e2e3e4e5e6e7e8e9eaebecedeeeff0f1f2f3f4f5f6f7f8f9" |
| "fafbfcfdfeff", |
| "b11e398dc80327a1c8e7f78c596a49344f012eda2d4efad8a050cc4c19afa97c59045a99ca" |
| "c7827271cb41c65e590e09da3275600c2f09b8367793a9aca3db71cc30c58179ec3e87c14c" |
| "01d5c1f3434f1d87", |
| }, { |
| "0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b", |
| "", |
| "", |
| "8da4e775a563c18f715f802a063c5a31b8a11f5c5ee1879ec3454e5f3c738d2d9d201395fa" |
| "a4b61a96c8", |
| }, |
| }; |
| |
| TEST(HKDFTest, HKDF) { |
| for (size_t i = 0; i < arraysize(kHKDFTests); i++) { |
| const HKDFTest& test(kHKDFTests[i]); |
| SCOPED_TRACE(i); |
| |
| std::vector<uint8_t> data; |
| ASSERT_TRUE(base::HexStringToBytes(test.key_hex, &data)); |
| const std::string key(reinterpret_cast<char*>(&data[0]), data.size()); |
| |
| data.clear(); |
| // |salt_hex| is optional and may be empty. |
| std::string salt(test.salt_hex); |
| if (!salt.empty()) { |
| ASSERT_TRUE(base::HexStringToBytes(salt, &data)); |
| salt.assign(reinterpret_cast<char*>(&data[0]), data.size()); |
| } |
| |
| data.clear(); |
| // |info_hex| is optional and may be empty. |
| std::string info(test.info_hex); |
| if (!info.empty()) { |
| ASSERT_TRUE(base::HexStringToBytes(info, &data)); |
| info.assign(reinterpret_cast<char*>(&data[0]), data.size()); |
| } |
| |
| data.clear(); |
| ASSERT_TRUE(base::HexStringToBytes(test.output_hex, &data)); |
| const std::string expected(reinterpret_cast<char*>(&data[0]), data.size()); |
| |
| // We set the key_length to the length of the expected output and then take |
| // the result from the first key, which is the client write key. |
| HKDF hkdf(key, salt, info, expected.size(), 0, 0); |
| |
| ASSERT_EQ(expected.size(), hkdf.client_write_key().size()); |
| EXPECT_EQ(0, memcmp(expected.data(), hkdf.client_write_key().data(), |
| expected.size())); |
| } |
| } |
| |
| } // namespace |
| } // namespace test |