| // 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/kem/subtle/cecpq2_aead_hkdf_hybrid_encrypt.h" |
| |
| #include <string> |
| #include <utility> |
| |
| #include "gtest/gtest.h" |
| #include "absl/memory/memory.h" |
| #include "absl/status/status.h" |
| #include "openssl/curve25519.h" |
| #include "openssl/hrss.h" |
| #include "tink/aead/aes_gcm_key_manager.h" |
| #include "tink/experimental/pqcrypto/kem/subtle/cecpq2_subtle_boringssl_util.h" |
| #include "tink/experimental/pqcrypto/kem/util/test_util.h" |
| #include "tink/hybrid_encrypt.h" |
| #include "tink/registry.h" |
| #include "tink/subtle/random.h" |
| #include "tink/subtle/subtle_util.h" |
| #include "tink/util/enums.h" |
| #include "tink/util/statusor.h" |
| #include "tink/util/test_matchers.h" |
| #include "tink/util/test_util.h" |
| |
| using ::crypto::tink::test::IsOk; |
| using ::crypto::tink::test::StatusIs; |
| using ::testing::HasSubstr; |
| |
| namespace crypto { |
| namespace tink { |
| namespace { |
| |
| google::crypto::tink::Cecpq2AeadHkdfPublicKey CreateValidKey() { |
| auto cecp2_key_pair = crypto::tink::pqc::GenerateCecpq2Keypair( |
| subtle::EllipticCurveType::CURVE25519) |
| .value(); |
| google::crypto::tink::Cecpq2AeadHkdfPublicKey sender_key; |
| sender_key.set_hrss_public_key_marshalled( |
| cecp2_key_pair.hrss_key_pair.hrss_public_key_marshaled); |
| sender_key.set_x25519_public_key_x(cecp2_key_pair.x25519_key_pair.pub_x); |
| sender_key.mutable_params()->mutable_kem_params()->set_curve_type( |
| google::crypto::tink::EllipticCurveType::CURVE25519); |
| sender_key.mutable_params()->mutable_kem_params()->set_hkdf_hash_type( |
| google::crypto::tink::HashType::SHA256); |
| sender_key.mutable_params() |
| ->mutable_dem_params() |
| ->mutable_aead_dem() |
| ->set_type_url("type.googleapis.com/google.crypto.tink.AesGcmKey"); |
| return sender_key; |
| } |
| |
| TEST(Cecpq2AeadHkdfHybridEncryptTest, ValidKey) { |
| google::crypto::tink::Cecpq2AeadHkdfPublicKey sender_key = CreateValidKey(); |
| auto result = Cecpq2AeadHkdfHybridEncrypt::New(sender_key); |
| EXPECT_THAT(result, IsOk()); |
| } |
| |
| TEST(Cecpq2AeadHkdfHybridEncryptTest, InvalidKeyNoFieldSet) { |
| auto result = Cecpq2AeadHkdfHybridEncrypt::New( |
| google::crypto::tink::Cecpq2AeadHkdfPublicKey()); |
| EXPECT_THAT(result.status(), |
| StatusIs(absl::StatusCode::kInvalidArgument, |
| HasSubstr("missing KEM required fields"))); |
| } |
| |
| TEST(Cecpq2AeadHkdfHybridEncryptTest, InvalidKeySomeFieldsSet) { |
| google::crypto::tink::Cecpq2AeadHkdfPublicKey sender_key = CreateValidKey(); |
| sender_key.set_x25519_public_key_x(""); |
| auto result(Cecpq2AeadHkdfHybridEncrypt::New(sender_key)); |
| EXPECT_THAT(result.status(), |
| StatusIs(absl::StatusCode::kInvalidArgument, |
| HasSubstr("missing KEM required fields"))); |
| } |
| |
| TEST(Cecpq2AeadHkdfHybridEncryptTest, InvalidKeyUnsupportedEcType) { |
| google::crypto::tink::Cecpq2AeadHkdfPublicKey sender_key = CreateValidKey(); |
| sender_key.mutable_params()->mutable_kem_params()->set_curve_type( |
| google::crypto::tink::EllipticCurveType::NIST_P256); |
| auto result = Cecpq2AeadHkdfHybridEncrypt::New(sender_key); |
| EXPECT_THAT(result.status(), |
| StatusIs(absl::StatusCode::kUnimplemented, |
| HasSubstr("Unsupported elliptic curve"))); |
| } |
| |
| TEST(Cecpq2AeadHkdfHybridEncryptTest, InvalidKeyUnsupportedDemKeyType) { |
| auto status_or_cecpq2_key = |
| pqc::GenerateCecpq2Keypair(subtle::EllipticCurveType::CURVE25519); |
| ASSERT_THAT(status_or_cecpq2_key, IsOk()); |
| auto cecpq2_key_pair = std::move(status_or_cecpq2_key).value(); |
| |
| google::crypto::tink::Cecpq2AeadHkdfPublicKey sender_key = CreateValidKey(); |
| sender_key.mutable_params() |
| ->mutable_dem_params() |
| ->mutable_aead_dem() |
| ->set_type_url("some.type.url/that.is.not.supported"); |
| auto result(Cecpq2AeadHkdfHybridEncrypt::New(sender_key)); |
| EXPECT_THAT(result.status(), StatusIs(absl::StatusCode::kInvalidArgument, |
| HasSubstr("Unsupported DEM key type"))); |
| } |
| |
| TEST(Cecpq2AeadHkdfHybridEncryptTest, Basic) { |
| // Prepare an Cecpq2 key |
| auto cecpq2_key = CreateValidKey(); |
| |
| // Register DEM key manager |
| ASSERT_THAT(Registry::RegisterKeyTypeManager( |
| absl::make_unique<AesGcmKeyManager>(), true), |
| IsOk()); |
| std::string dem_key_type = AesGcmKeyManager().get_key_type(); |
| |
| // Generate and test many keys with various parameters |
| std::string plaintext = "some plaintext"; |
| std::string context_info = "some context info"; |
| for (auto curve : {google::crypto::tink::EllipticCurveType::CURVE25519}) { |
| for (auto ec_point_format : |
| {google::crypto::tink::EcPointFormat::COMPRESSED}) { |
| for (auto hash_type : {google::crypto::tink::HashType::SHA256, |
| google::crypto::tink::HashType::SHA512}) { |
| for (uint32_t aes_gcm_key_size : {16, 32}) { |
| SCOPED_TRACE(absl::StrCat(curve, ":", ec_point_format, ":", hash_type, |
| ":", aes_gcm_key_size)); |
| cecpq2_key.mutable_params()->mutable_kem_params()->set_curve_type( |
| curve); |
| cecpq2_key.mutable_params() |
| ->mutable_kem_params() |
| ->set_ec_point_format(ec_point_format); |
| cecpq2_key.mutable_params()->mutable_kem_params()->set_hkdf_hash_type( |
| hash_type); |
| |
| google::crypto::tink::AesGcmKeyFormat format; |
| format.set_key_size(aes_gcm_key_size); |
| cecpq2_key.mutable_params() |
| ->mutable_dem_params() |
| ->mutable_aead_dem() |
| ->set_value(format.SerializeAsString()); |
| cecpq2_key.mutable_params() |
| ->mutable_dem_params() |
| ->mutable_aead_dem() |
| ->set_type_url( |
| "type.googleapis.com/google.crypto.tink.AesGcmKey"); |
| auto key_or = Cecpq2AeadHkdfHybridEncrypt::New(cecpq2_key); |
| ASSERT_THAT(key_or, IsOk()); |
| std::unique_ptr<HybridEncrypt> hybrid_encrypt( |
| std::move(key_or.value())); |
| // Use the primitive |
| auto encrypt_result = |
| hybrid_encrypt->Encrypt(plaintext, context_info); |
| EXPECT_THAT(encrypt_result, IsOk()); |
| } |
| } |
| } |
| } |
| } |
| |
| } // namespace |
| } // namespace tink |
| } // namespace crypto |