| // Copyright 2021 Google LLC |
| // |
| // 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/experimental/pqcrypto/signature/falcon_sign_key_manager.h" |
| |
| #include <string> |
| |
| #include "gmock/gmock.h" |
| #include "gtest/gtest.h" |
| #include "absl/container/flat_hash_set.h" |
| #include "absl/strings/str_cat.h" |
| #include "tink/experimental/pqcrypto/signature/subtle/falcon_sign.h" |
| #include "tink/experimental/pqcrypto/signature/subtle/falcon_subtle_utils.h" |
| #include "tink/experimental/pqcrypto/signature/subtle/falcon_verify.h" |
| #include "tink/public_key_verify.h" |
| #include "tink/util/secret_data.h" |
| #include "tink/util/status.h" |
| #include "tink/util/statusor.h" |
| #include "tink/util/test_matchers.h" |
| |
| namespace crypto { |
| namespace tink { |
| namespace { |
| |
| using ::crypto::tink::test::IsOk; |
| using ::crypto::tink::util::StatusOr; |
| using ::google::crypto::tink::FalconKeyFormat; |
| using ::google::crypto::tink::FalconPrivateKey; |
| using ::google::crypto::tink::FalconPublicKey; |
| using ::google::crypto::tink::KeyData; |
| using ::testing::Eq; |
| using ::testing::Not; |
| using ::testing::SizeIs; |
| |
| struct FalconTestCase { |
| std::string test_name; |
| int32_t private_key_size; |
| int32_t public_key_size; |
| }; |
| |
| using FalconSignKeyManagerTest = testing::TestWithParam<FalconTestCase>; |
| |
| // Helper function that returns a valid falcon key format. |
| StatusOr<FalconKeyFormat> CreateValidKeyFormat(int32 private_key_size) { |
| FalconKeyFormat key_format; |
| key_format.set_key_size(private_key_size); |
| |
| return key_format; |
| } |
| |
| TEST(FalconSignKeyManagerTest, Basic) { |
| EXPECT_THAT(FalconSignKeyManager().get_version(), Eq(0)); |
| EXPECT_THAT(FalconSignKeyManager().key_material_type(), |
| Eq(KeyData::ASYMMETRIC_PRIVATE)); |
| EXPECT_THAT(FalconSignKeyManager().get_key_type(), |
| Eq("type.googleapis.com/google.crypto.tink.FalconPrivateKey")); |
| } |
| |
| TEST_P(FalconSignKeyManagerTest, ValidKeyFormat) { |
| const FalconTestCase& test_case = GetParam(); |
| |
| StatusOr<FalconKeyFormat> key_format = |
| CreateValidKeyFormat(test_case.private_key_size); |
| ASSERT_THAT(key_format, IsOk()); |
| |
| EXPECT_THAT(FalconSignKeyManager().ValidateKeyFormat(*key_format), IsOk()); |
| } |
| |
| TEST(FalconSignKeyManagerTest, InvalidKeyFormat) { |
| StatusOr<FalconKeyFormat> key_format = CreateValidKeyFormat(0); |
| ASSERT_THAT(key_format, IsOk()); |
| |
| EXPECT_THAT(FalconSignKeyManager().ValidateKeyFormat(*key_format), |
| Not(IsOk())); |
| } |
| |
| TEST_P(FalconSignKeyManagerTest, CreateKeyValid) { |
| const FalconTestCase& test_case = GetParam(); |
| |
| StatusOr<FalconKeyFormat> key_format = |
| CreateValidKeyFormat(test_case.private_key_size); |
| ASSERT_THAT(key_format, IsOk()); |
| |
| StatusOr<FalconPrivateKey> private_key = |
| FalconSignKeyManager().CreateKey(*key_format); |
| ASSERT_THAT(private_key, IsOk()); |
| |
| EXPECT_THAT(FalconSignKeyManager().ValidateKey(*private_key), IsOk()); |
| EXPECT_THAT(private_key->version(), Eq(0)); |
| EXPECT_THAT(private_key->public_key().version(), Eq(private_key->version())); |
| EXPECT_THAT(private_key->key_value(), SizeIs(test_case.private_key_size)); |
| } |
| |
| TEST_P(FalconSignKeyManagerTest, PrivateKeyWrongVersion) { |
| const FalconTestCase& test_case = GetParam(); |
| |
| StatusOr<FalconKeyFormat> key_format = |
| CreateValidKeyFormat(test_case.private_key_size); |
| ASSERT_THAT(key_format, IsOk()); |
| |
| StatusOr<FalconPrivateKey> private_key = |
| FalconSignKeyManager().CreateKey(*key_format); |
| ASSERT_THAT(private_key, IsOk()); |
| |
| private_key->set_version(1); |
| EXPECT_THAT(FalconSignKeyManager().ValidateKey(*private_key), Not(IsOk())); |
| } |
| |
| TEST_P(FalconSignKeyManagerTest, CreateKeyAlwaysNew) { |
| const FalconTestCase& test_case = GetParam(); |
| |
| StatusOr<FalconKeyFormat> key_format = |
| CreateValidKeyFormat(test_case.private_key_size); |
| ASSERT_THAT(key_format, IsOk()); |
| |
| absl::flat_hash_set<std::string> keys; |
| int num_tests = 5; |
| for (int i = 0; i < num_tests; ++i) { |
| StatusOr<FalconPrivateKey> private_key = |
| FalconSignKeyManager().CreateKey(*key_format); |
| ASSERT_THAT(private_key, IsOk()); |
| keys.insert(private_key->key_value()); |
| } |
| EXPECT_THAT(keys, SizeIs(num_tests)); |
| } |
| |
| TEST_P(FalconSignKeyManagerTest, GetPublicKey) { |
| const FalconTestCase& test_case = GetParam(); |
| |
| StatusOr<FalconKeyFormat> key_format = |
| CreateValidKeyFormat(test_case.private_key_size); |
| ASSERT_THAT(key_format, IsOk()); |
| |
| StatusOr<FalconPrivateKey> private_key = |
| FalconSignKeyManager().CreateKey(*key_format); |
| ASSERT_THAT(private_key, IsOk()); |
| |
| StatusOr<FalconPublicKey> public_key = |
| FalconSignKeyManager().GetPublicKey(*private_key); |
| ASSERT_THAT(public_key, IsOk()); |
| |
| EXPECT_THAT(public_key->version(), Eq(private_key->public_key().version())); |
| EXPECT_THAT(public_key->key_value(), |
| Eq(private_key->public_key().key_value())); |
| } |
| |
| TEST_P(FalconSignKeyManagerTest, CreateValid) { |
| const FalconTestCase& test_case = GetParam(); |
| |
| StatusOr<FalconKeyFormat> key_format = |
| CreateValidKeyFormat(test_case.private_key_size); |
| ASSERT_THAT(key_format, IsOk()); |
| |
| util::StatusOr<FalconPrivateKey> private_key = |
| FalconSignKeyManager().CreateKey(*key_format); |
| ASSERT_THAT(private_key, IsOk()); |
| |
| util::StatusOr<std::unique_ptr<PublicKeySign>> signer = |
| FalconSignKeyManager().GetPrimitive<PublicKeySign>(*private_key); |
| ASSERT_THAT(signer, IsOk()); |
| |
| StatusOr<subtle::FalconPublicKeyPqclean> falcon_public_key_pqclean = |
| subtle::FalconPublicKeyPqclean::NewPublicKey( |
| private_key->public_key().key_value()); |
| ASSERT_THAT(falcon_public_key_pqclean, IsOk()); |
| |
| util::StatusOr<std::unique_ptr<PublicKeyVerify>> verifier = |
| subtle::FalconVerify::New(*falcon_public_key_pqclean); |
| ASSERT_THAT(verifier, IsOk()); |
| |
| std::string message = "Some message"; |
| util::StatusOr<std::string> signature = (*signer)->Sign(message); |
| ASSERT_THAT(signature, IsOk()); |
| EXPECT_THAT((*verifier)->Verify(*signature, message), IsOk()); |
| } |
| |
| TEST_P(FalconSignKeyManagerTest, CreateBadPublicKey) { |
| const FalconTestCase& test_case = GetParam(); |
| |
| StatusOr<FalconKeyFormat> key_format = |
| CreateValidKeyFormat(test_case.private_key_size); |
| ASSERT_THAT(key_format, IsOk()); |
| |
| util::StatusOr<FalconPrivateKey> private_key = |
| FalconSignKeyManager().CreateKey(*key_format); |
| ASSERT_THAT(private_key, IsOk()); |
| |
| util::StatusOr<std::unique_ptr<PublicKeySign>> signer = |
| FalconSignKeyManager().GetPrimitive<PublicKeySign>(*private_key); |
| ASSERT_THAT(signer, IsOk()); |
| |
| std::string bad_public_key_data(test_case.public_key_size, '@'); |
| |
| StatusOr<subtle::FalconPublicKeyPqclean> falcon_public_key_pqclean = |
| subtle::FalconPublicKeyPqclean::NewPublicKey(bad_public_key_data); |
| ASSERT_THAT(falcon_public_key_pqclean, IsOk()); |
| util::StatusOr<std::unique_ptr<PublicKeyVerify>> direct_verifier = |
| subtle::FalconVerify::New(*falcon_public_key_pqclean); |
| ASSERT_THAT(direct_verifier, IsOk()); |
| |
| std::string message = "Some message"; |
| util::StatusOr<std::string> signature = (*signer)->Sign(message); |
| ASSERT_THAT(signature, IsOk()); |
| EXPECT_THAT((*direct_verifier)->Verify(*signature, message), Not(IsOk())); |
| } |
| |
| INSTANTIATE_TEST_SUITE_P( |
| FalconSignKeyManagerTests, FalconSignKeyManagerTest, |
| testing::ValuesIn<FalconTestCase>( |
| {{"Falcon512", subtle::kFalcon512PrivateKeySize, |
| subtle::kFalcon512PublicKeySize}, |
| {"Falcon1024", subtle::kFalcon1024PrivateKeySize, |
| subtle::kFalcon1024PublicKeySize}}), |
| [](const testing::TestParamInfo<FalconSignKeyManagerTest::ParamType>& |
| info) { return info.param.test_name; }); |
| |
| } // namespace |
| |
| } // namespace tink |
| } // namespace crypto |