| // Copyright 2017 Google Inc. |
| // |
| // 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. |
| // |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| #include "tink/subtle/hkdf.h" |
| |
| #include "gtest/gtest.h" |
| #include "tink/subtle/common_enums.h" |
| #include "tink/util/secret_data.h" |
| #include "tink/util/status.h" |
| #include "tink/util/statusor.h" |
| #include "tink/util/test_util.h" |
| |
| namespace crypto { |
| namespace tink { |
| namespace subtle { |
| namespace { |
| |
| class HkdfTest : public ::testing::Test {}; |
| |
| struct TestVector { |
| HashType hash_type; |
| std::string ikm_hex; |
| std::string salt_hex; |
| std::string info_hex; |
| size_t out_len; |
| std::string out_key_hex; |
| }; |
| |
| // Tests vectors from RFC 5869. |
| static const std::vector<TestVector> test_vector( |
| {{ |
| HashType::SHA256, "0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b", |
| "000102030405060708090a0b0c", "f0f1f2f3f4f5f6f7f8f9", 42, |
| "3cb25f25faacd57a90434f64d0362f2a2d2d0a90cf1a5a4c5db02d56ecc4c5bf34007" |
| "208" |
| "d5b887185865", |
| }, |
| { |
| HashType::SHA256, |
| "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f" |
| "202122232425262728292a2b2c2d2e2f303132333435363738393a3b3c3d3e3f" |
| "404142434445464748494a4b4c4d4e4f", |
| "606162636465666768696a6b6c6d6e6f707172737475767778797a7b7c7d7e7f" |
| "808182838485868788898a8b8c8d8e8f909192939495969798999a9b9c9d9e9f" |
| "a0a1a2a3a4a5a6a7a8a9aaabacadaeaf", |
| "b0b1b2b3b4b5b6b7b8b9babbbcbdbebfc0c1c2c3c4c5c6c7c8c9cacbcccdcecf" |
| "d0d1d2d3d4d5d6d7d8d9dadbdcdddedfe0e1e2e3e4e5e6e7e8e9eaebecedeeef" |
| "f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff", |
| 82, |
| "b11e398dc80327a1c8e7f78c596a49344f012eda2d4efad8a050cc4c19afa97c" |
| "59045a99cac7827271cb41c65e590e09da3275600c2f09b8367793a9aca3db71" |
| "cc30c58179ec3e87c14c01d5c1f3434f1d87", |
| }, |
| {HashType::SHA256, "0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b", "", "", |
| 42, |
| "8da4e775a563c18f715f802a063c5a31b8a11f5c5ee1879ec3454e5f3c738d2d" |
| "9d201395faa4b61a96c8"}, |
| {HashType::SHA1, "0b0b0b0b0b0b0b0b0b0b0b", "000102030405060708090a0b0c", |
| "f0f1f2f3f4f5f6f7f8f9", 42, |
| "085a01ea1b10f36933068b56efa5ad81a4f14b822f5b091568a9cdd4f155fda2c22e4224" |
| "78d305f3f896"}, |
| {HashType::SHA1, |
| "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f" |
| "202122232425262728292a2b2c2d2e2f303132333435363738393a3b3c3d3e3f" |
| "404142434445464748494a4b4c4d4e4f", |
| "606162636465666768696a6b6c6d6e6f707172737475767778797a7b7c7d7e7f" |
| "808182838485868788898a8b8c8d8e8f909192939495969798999a9b9c9d9e9f" |
| "a0a1a2a3a4a5a6a7a8a9aaabacadaeaf", |
| "b0b1b2b3b4b5b6b7b8b9babbbcbdbebfc0c1c2c3c4c5c6c7c8c9cacbcccdcecf" |
| "d0d1d2d3d4d5d6d7d8d9dadbdcdddedfe0e1e2e3e4e5e6e7e8e9eaebecedeeef" |
| "f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff", |
| 82, |
| "0bd770a74d1160f7c9f12cd5912a06ebff6adcae899d92191fe4305673ba2ffe" |
| "8fa3f1a4e5ad79f3f334b3b202b2173c486ea37ce3d397ed034c7f9dfeb15c5e" |
| "927336d0441f4c4300e2cff0d0900b52d3b4"}, |
| {HashType::SHA1, "0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b", "", "", |
| 42, |
| "0ac1af7002b3d761d1e55298da9d0506b9ae52057220a306e07b6b87e8df21d0" |
| "ea00033de03984d34918"}}); |
| |
| TEST_F(HkdfTest, testBasic) { |
| for (const TestVector& test : test_vector) { |
| auto hkdf_or = |
| Hkdf::ComputeHkdf(test.hash_type, test::HexDecodeOrDie(test.ikm_hex), |
| test::HexDecodeOrDie(test.salt_hex), |
| test::HexDecodeOrDie(test.info_hex), test.out_len); |
| ASSERT_TRUE(hkdf_or.ok()); |
| EXPECT_EQ(test::HexEncode(hkdf_or.ValueOrDie()), test.out_key_hex); |
| } |
| } |
| |
| TEST_F(HkdfTest, testBasicSecretData) { |
| for (const TestVector& test : test_vector) { |
| auto hkdf_or = Hkdf::ComputeHkdf( |
| test.hash_type, |
| util::SecretDataFromStringView(test::HexDecodeOrDie(test.ikm_hex)), |
| test::HexDecodeOrDie(test.salt_hex), |
| test::HexDecodeOrDie(test.info_hex), test.out_len); |
| ASSERT_TRUE(hkdf_or.ok()); |
| EXPECT_EQ( |
| test::HexEncode(util::SecretDataAsStringView(hkdf_or.ValueOrDie())), |
| test.out_key_hex); |
| } |
| } |
| |
| TEST_F(HkdfTest, testLongOutput) { |
| TestVector test = test_vector[0]; |
| auto status_or_string = Hkdf::ComputeHkdf( |
| test.hash_type, test::HexDecodeOrDie(test.ikm_hex), |
| test::HexDecodeOrDie(test.salt_hex), test::HexDecodeOrDie(test.info_hex), |
| 255 * 32 + 1 /* 255 * hashLength + 1 */); |
| EXPECT_FALSE(status_or_string.ok()); |
| EXPECT_EQ(status_or_string.status().error_message(), |
| "BoringSSL's HKDF failed"); |
| } |
| |
| TEST_F(HkdfTest, ComputeEciesHkdfSecretData) { |
| for (const TestVector& test : test_vector) { |
| std::string ikm = test::HexDecodeOrDie(test.ikm_hex); |
| std::string kem_bytes = ikm.substr(0, ikm.size() / 2); |
| util::SecretData shared_secret(ikm.begin() + ikm.size() / 2, ikm.end()); |
| auto hkdf_or = Hkdf::ComputeEciesHkdfSymmetricKey( |
| test.hash_type, kem_bytes, shared_secret, |
| test::HexDecodeOrDie(test.salt_hex), |
| test::HexDecodeOrDie(test.info_hex), test.out_len); |
| ASSERT_TRUE(hkdf_or.ok()); |
| EXPECT_EQ( |
| test::HexEncode(util::SecretDataAsStringView(hkdf_or.ValueOrDie())), |
| test.out_key_hex); |
| } |
| } |
| |
| } // namespace |
| } // namespace subtle |
| } // namespace tink |
| } // namespace crypto |
| |