| // Copyright 2018 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/aes_gcm_siv_boringssl.h" |
| |
| #include <string> |
| #include <vector> |
| |
| #include "gmock/gmock.h" |
| #include "gtest/gtest.h" |
| #include "absl/status/status.h" |
| #include "absl/strings/escaping.h" |
| #include "absl/strings/str_cat.h" |
| #include "tink/aead/internal/wycheproof_aead.h" |
| #include "tink/config/tink_fips.h" |
| #include "tink/internal/ssl_util.h" |
| #include "tink/subtle/subtle_util.h" |
| #include "tink/util/secret_data.h" |
| #include "tink/util/statusor.h" |
| #include "tink/util/test_matchers.h" |
| |
| namespace crypto { |
| namespace tink { |
| namespace subtle { |
| namespace { |
| |
| constexpr absl::string_view kKey256Hex = |
| "000102030405060708090a0b0c0d0e0f000102030405060708090a0b0c0d0e0f"; |
| constexpr absl::string_view kMessage = "Some data to encrypt."; |
| constexpr absl::string_view kAssociatedData = "Some data to authenticate."; |
| |
| constexpr int kIvSizeInBytes = 12; |
| constexpr int kTagSizeInBytes = 16; |
| |
| using ::crypto::tink::test::IsOk; |
| using ::crypto::tink::test::StatusIs; |
| using ::testing::AllOf; |
| using ::testing::Eq; |
| using ::testing::Not; |
| using ::testing::SizeIs; |
| using ::testing::TestWithParam; |
| using ::testing::ValuesIn; |
| |
| TEST(AesGcmSivBoringSslTest, EncryptDecrypt) { |
| if (IsFipsModeEnabled()) { |
| GTEST_SKIP() << "Not supported in FIPS-only mode"; |
| } |
| |
| util::SecretData key = |
| util::SecretDataFromStringView(absl::HexStringToBytes(kKey256Hex)); |
| if (!internal::IsBoringSsl()) { |
| EXPECT_THAT(AesGcmSivBoringSsl::New(key).status(), |
| StatusIs(absl::StatusCode::kUnimplemented)); |
| } else { |
| util::StatusOr<std::unique_ptr<Aead>> aead = AesGcmSivBoringSsl::New(key); |
| ASSERT_THAT(aead, IsOk()); |
| |
| util::StatusOr<std::string> ciphertext = |
| (*aead)->Encrypt(kMessage, kAssociatedData); |
| ASSERT_THAT(ciphertext, IsOk()); |
| EXPECT_THAT(*ciphertext, |
| SizeIs(kMessage.size() + kIvSizeInBytes + kTagSizeInBytes)); |
| util::StatusOr<std::string> plaintext = |
| (*aead)->Decrypt(*ciphertext, kAssociatedData); |
| ASSERT_THAT(plaintext, IsOk()); |
| EXPECT_EQ(*plaintext, kMessage); |
| } |
| } |
| |
| TEST(AesGcmSivBoringSslTest, DecryptFailsIfCiphertextTooSmall) { |
| if (!internal::IsBoringSsl()) { |
| GTEST_SKIP() << "Unimplemented with OpenSSL"; |
| } |
| if (IsFipsModeEnabled()) { |
| GTEST_SKIP() << "Not supported in FIPS-only mode"; |
| } |
| |
| util::SecretData key = |
| util::SecretDataFromStringView(absl::HexStringToBytes(kKey256Hex)); |
| util::StatusOr<std::unique_ptr<Aead>> aead = AesGcmSivBoringSsl::New(key); |
| ASSERT_THAT(aead, IsOk()); |
| |
| for (int i = 1; i < kIvSizeInBytes + kTagSizeInBytes; i++) { |
| std::string ciphertext; |
| ResizeStringUninitialized(&ciphertext, i); |
| EXPECT_THAT((*aead)->Decrypt(ciphertext, kAssociatedData).status(), |
| StatusIs(absl::StatusCode::kInvalidArgument)); |
| } |
| } |
| |
| TEST(AesGcmSivBoringSslTest, TestFipsOnly) { |
| if (!internal::IsBoringSsl()) { |
| GTEST_SKIP() << "Unimplemented with OpenSSL"; |
| } |
| if (!IsFipsModeEnabled()) { |
| GTEST_SKIP() << "Only supported in FIPS-only mode"; |
| } |
| |
| util::SecretData key128 = util::SecretDataFromStringView( |
| absl::HexStringToBytes("000102030405060708090a0b0c0d0e0f")); |
| util::SecretData key256 = |
| util::SecretDataFromStringView(absl::HexStringToBytes( |
| "000102030405060708090a0b0c0d0e0f000102030405060708090a0b0c0d0e0f")); |
| |
| EXPECT_THAT(AesGcmSivBoringSsl::New(key128).status(), |
| StatusIs(absl::StatusCode::kInternal)); |
| EXPECT_THAT(AesGcmSivBoringSsl::New(key256).status(), |
| StatusIs(absl::StatusCode::kInternal)); |
| } |
| |
| class AesGcmSivBoringSslWycheproofTest |
| : public TestWithParam<internal::WycheproofTestVector> { |
| void SetUp() override { |
| if (!internal::IsBoringSsl()) { |
| GTEST_SKIP() << "Unimplemented with OpenSSL"; |
| } |
| if (IsFipsModeEnabled()) { |
| GTEST_SKIP() << "Not supported in FIPS-only mode"; |
| } |
| internal::WycheproofTestVector test_vector = GetParam(); |
| if ((test_vector.key.size() != 16 && test_vector.key.size() != 32) || |
| test_vector.nonce.size() != kIvSizeInBytes || |
| test_vector.tag.size() != kTagSizeInBytes) { |
| GTEST_SKIP() << "Unsupported parameters: key size " |
| << test_vector.key.size() |
| << " nonce size: " << test_vector.nonce.size() |
| << " tag size: " << test_vector.tag.size(); |
| } |
| } |
| }; |
| |
| TEST_P(AesGcmSivBoringSslWycheproofTest, Decrypt) { |
| internal::WycheproofTestVector test_vector = GetParam(); |
| util::SecretData key = util::SecretDataFromStringView(test_vector.key); |
| util::StatusOr<std::unique_ptr<Aead>> cipher = AesGcmSivBoringSsl::New(key); |
| ASSERT_THAT(cipher, IsOk()); |
| std::string ciphertext = |
| absl::StrCat(test_vector.nonce, test_vector.ct, test_vector.tag); |
| util::StatusOr<std::string> plaintext = |
| (*cipher)->Decrypt(ciphertext, test_vector.aad); |
| if (plaintext.ok()) { |
| EXPECT_NE(test_vector.expected, "invalid"); |
| EXPECT_EQ(*plaintext, test_vector.msg); |
| } else { |
| EXPECT_THAT(test_vector.expected, Not(AllOf(Eq("valid"), Eq("acceptable")))) |
| << "Could not decrypt test with tcId: " << test_vector.id |
| << " iv_size: " << test_vector.nonce.size() |
| << " tag_size: " << test_vector.tag.size() |
| << " key_size: " << key.size() << "; error: " << plaintext.status(); |
| } |
| } |
| |
| INSTANTIATE_TEST_SUITE_P(AesGcmSivBoringSslWycheproofTests, |
| AesGcmSivBoringSslWycheproofTest, |
| ValuesIn(internal::ReadWycheproofTestVectors( |
| /*file_name=*/"aes_gcm_siv_test.json"))); |
| |
| } // namespace |
| } // namespace subtle |
| } // namespace tink |
| } // namespace crypto |