| // 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_verify_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/falcon_sign_key_manager.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; |
| |
| struct FalconTestCase { |
| std::string test_name; |
| int32_t private_key_size; |
| int32_t public_key_size; |
| }; |
| |
| using FalconVerifyKeyManagerTest = testing::TestWithParam<FalconTestCase>; |
| |
| // Helper function that returns a valid falcon private key. |
| StatusOr<FalconPrivateKey> CreateValidPrivateKey(int32 private_key_size) { |
| FalconKeyFormat key_format; |
| key_format.set_key_size(private_key_size); |
| |
| return FalconSignKeyManager().CreateKey(key_format); |
| } |
| |
| // Helper function that returns a valid falcon public key. |
| StatusOr<FalconPublicKey> CreateValidPublicKey(int32 private_key_size) { |
| StatusOr<FalconPrivateKey> private_key = |
| CreateValidPrivateKey(private_key_size); |
| |
| if (!private_key.ok()) return private_key.status(); |
| return FalconSignKeyManager().GetPublicKey(*private_key); |
| } |
| |
| TEST(FalconVerifyKeyManagerTest, Basics) { |
| EXPECT_THAT(FalconVerifyKeyManager().get_version(), Eq(0)); |
| EXPECT_THAT(FalconVerifyKeyManager().key_material_type(), |
| Eq(KeyData::ASYMMETRIC_PUBLIC)); |
| EXPECT_THAT(FalconVerifyKeyManager().get_key_type(), |
| Eq("type.googleapis.com/google.crypto.tink.FalconPublicKey")); |
| } |
| |
| TEST(FalconVerifyKeyManagerTest, ValidateEmptyKey) { |
| EXPECT_THAT(FalconVerifyKeyManager().ValidateKey(FalconPublicKey()), |
| Not(IsOk())); |
| } |
| |
| TEST_P(FalconVerifyKeyManagerTest, PublicKeyValid) { |
| const FalconTestCase& test_case = GetParam(); |
| |
| StatusOr<FalconPublicKey> public_key = |
| CreateValidPublicKey(test_case.private_key_size); |
| ASSERT_THAT(public_key, IsOk()); |
| |
| EXPECT_THAT(FalconVerifyKeyManager().ValidateKey(*public_key), IsOk()); |
| } |
| |
| TEST_P(FalconVerifyKeyManagerTest, PublicKeyWrongVersion) { |
| const FalconTestCase& test_case = GetParam(); |
| |
| StatusOr<FalconPublicKey> public_key = |
| CreateValidPublicKey(test_case.private_key_size); |
| ASSERT_THAT(public_key, IsOk()); |
| |
| public_key->set_version(1); |
| EXPECT_THAT(FalconVerifyKeyManager().ValidateKey(*public_key), Not(IsOk())); |
| } |
| |
| TEST_P(FalconVerifyKeyManagerTest, Create) { |
| const FalconTestCase& test_case = GetParam(); |
| |
| StatusOr<FalconPrivateKey> private_key = |
| CreateValidPrivateKey(test_case.private_key_size); |
| ASSERT_THAT(private_key, IsOk()); |
| |
| StatusOr<FalconPublicKey> public_key = |
| FalconSignKeyManager().GetPublicKey(*private_key); |
| ASSERT_THAT(public_key, IsOk()); |
| |
| StatusOr<subtle::FalconPrivateKeyPqclean> falcon_private_key_pqclean = |
| subtle::FalconPrivateKeyPqclean::NewPrivateKey( |
| util::SecretDataFromStringView(private_key->key_value())); |
| |
| util::StatusOr<std::unique_ptr<PublicKeySign>> direct_signer = |
| subtle::FalconSign::New(*falcon_private_key_pqclean); |
| ASSERT_THAT(direct_signer, IsOk()); |
| |
| util::StatusOr<std::unique_ptr<PublicKeyVerify>> verifier = |
| FalconVerifyKeyManager().GetPrimitive<PublicKeyVerify>(*public_key); |
| ASSERT_THAT(verifier, IsOk()); |
| |
| std::string message = "Some message"; |
| util::StatusOr<std::string> signature = (*direct_signer)->Sign(message); |
| ASSERT_THAT(signature, IsOk()); |
| EXPECT_THAT((*verifier)->Verify(*signature, message), IsOk()); |
| } |
| |
| TEST_P(FalconVerifyKeyManagerTest, CreateInvalidPublicKey) { |
| const FalconTestCase& test_case = GetParam(); |
| |
| StatusOr<FalconPrivateKey> private_key = |
| CreateValidPrivateKey(test_case.private_key_size); |
| ASSERT_THAT(private_key, IsOk()); |
| |
| StatusOr<FalconPublicKey> public_key = |
| FalconSignKeyManager().GetPublicKey(*private_key); |
| ASSERT_THAT(public_key, IsOk()); |
| |
| std::string bad_public_key_data = "bad_public_key"; |
| public_key->set_key_value(bad_public_key_data); |
| |
| util::StatusOr<std::unique_ptr<PublicKeyVerify>> verifier = |
| FalconVerifyKeyManager().GetPrimitive<PublicKeyVerify>(*public_key); |
| EXPECT_THAT(verifier, Not(IsOk())); |
| } |
| |
| TEST_P(FalconVerifyKeyManagerTest, CreateDifferentPublicKey) { |
| const FalconTestCase& test_case = GetParam(); |
| |
| StatusOr<FalconPrivateKey> private_key = |
| CreateValidPrivateKey(test_case.private_key_size); |
| ASSERT_THAT(private_key, IsOk()); |
| |
| // Create a new public key derived from a diffferent private key. |
| StatusOr<FalconPrivateKey> new_private_key = |
| CreateValidPrivateKey(test_case.private_key_size); |
| ASSERT_THAT(new_private_key, IsOk()); |
| StatusOr<FalconPublicKey> public_key = |
| FalconSignKeyManager().GetPublicKey(*new_private_key); |
| ASSERT_THAT(public_key, IsOk()); |
| |
| StatusOr<subtle::FalconPrivateKeyPqclean> falcon_private_key_pqclean = |
| subtle::FalconPrivateKeyPqclean::NewPrivateKey( |
| util::SecretDataFromStringView(private_key->key_value())); |
| |
| util::StatusOr<std::unique_ptr<PublicKeySign>> direct_signer = |
| subtle::FalconSign::New(*falcon_private_key_pqclean); |
| ASSERT_THAT(direct_signer, IsOk()); |
| |
| util::StatusOr<std::unique_ptr<PublicKeyVerify>> verifier = |
| FalconVerifyKeyManager().GetPrimitive<PublicKeyVerify>(*public_key); |
| ASSERT_THAT(verifier, IsOk()); |
| |
| std::string message = "Some message"; |
| util::StatusOr<std::string> signature = (*direct_signer)->Sign(message); |
| ASSERT_THAT(signature, IsOk()); |
| EXPECT_THAT((*verifier)->Verify(*signature, message), Not(IsOk())); |
| } |
| |
| INSTANTIATE_TEST_SUITE_P( |
| FalconVeirfyKeyManagerTests, FalconVerifyKeyManagerTest, |
| testing::ValuesIn<FalconTestCase>( |
| {{"Falcon512", subtle::kFalcon512PrivateKeySize, |
| subtle::kFalcon512PublicKeySize}, |
| {"Falcon1024", subtle::kFalcon1024PrivateKeySize, |
| subtle::kFalcon1024PublicKeySize}}), |
| [](const testing::TestParamInfo<FalconVerifyKeyManagerTest::ParamType>& |
| info) { return info.param.test_name; }); |
| |
| } // namespace |
| |
| } // namespace tink |
| } // namespace crypto |