| // Copyright 2019 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/core/key_type_manager.h" |
| |
| #include <string> |
| |
| #include "gmock/gmock.h" |
| #include "gtest/gtest.h" |
| #include "tink/aead.h" |
| #include "tink/subtle/aes_gcm_boringssl.h" |
| #include "tink/subtle/random.h" |
| #include "tink/util/status.h" |
| #include "tink/util/statusor.h" |
| #include "tink/util/test_matchers.h" |
| #include "tink/util/validation.h" |
| #include "proto/aes_gcm.pb.h" |
| |
| namespace crypto { |
| namespace tink { |
| |
| namespace { |
| |
| using ::crypto::tink::test::StatusIs; |
| using ::google::crypto::tink::AesGcmKey; |
| using ::google::crypto::tink::AesGcmKeyFormat; |
| using ::testing::Eq; |
| |
| // A class for testing. We will construct objects from an aead key, so that we |
| // can check that a keymanager can handle multiple primitives. It is really |
| // insecure, as it does nothing except provide access to the key. |
| class AeadVariant { |
| public: |
| explicit AeadVariant(std::string s) : s_(s) {} |
| |
| std::string get() { return s_; } |
| |
| private: |
| std::string s_; |
| }; |
| |
| class ExampleKeyTypeManager : public KeyTypeManager<AesGcmKey, AesGcmKeyFormat, |
| List<Aead, AeadVariant>> { |
| public: |
| class AeadFactory : public PrimitiveFactory<Aead> { |
| public: |
| crypto::tink::util::StatusOr<std::unique_ptr<Aead>> Create( |
| const AesGcmKey& key) const override { |
| // Ignore the key and returned one with a fixed size for this test. |
| return {subtle::AesGcmBoringSsl::New(key.key_value())}; |
| } |
| }; |
| |
| class AeadVariantFactory : public PrimitiveFactory<AeadVariant> { |
| public: |
| crypto::tink::util::StatusOr<std::unique_ptr<AeadVariant>> Create( |
| const AesGcmKey& key) const override { |
| return absl::make_unique<AeadVariant>(key.key_value()); |
| } |
| }; |
| |
| ExampleKeyTypeManager() |
| : KeyTypeManager(absl::make_unique<AeadFactory>(), |
| absl::make_unique<AeadVariantFactory>()) {} |
| |
| google::crypto::tink::KeyData::KeyMaterialType key_material_type() |
| const override { |
| return google::crypto::tink::KeyData::SYMMETRIC; |
| } |
| |
| uint32_t get_version() const override { return kVersion; } |
| |
| const std::string& get_key_type() const override { return kKeyType; } |
| |
| crypto::tink::util::Status ValidateKey(const AesGcmKey& key) const override { |
| return util::OkStatus(); |
| } |
| |
| crypto::tink::util::Status ValidateKeyFormat( |
| const AesGcmKeyFormat& key_format) const override { |
| return util::OkStatus(); |
| } |
| |
| crypto::tink::util::StatusOr<AesGcmKey> CreateKey( |
| const AesGcmKeyFormat& key_format) const override { |
| AesGcmKey result; |
| result.set_key_value(subtle::Random::GetRandomBytes(key_format.key_size())); |
| return result; |
| } |
| |
| private: |
| static const int kVersion = 0; |
| const std::string kKeyType = "myKeyType"; |
| }; |
| |
| TEST(KeyManagerTest, CreateAead) { |
| AesGcmKeyFormat key_format; |
| key_format.set_key_size(16); |
| AesGcmKey key = ExampleKeyTypeManager().CreateKey(key_format).ValueOrDie(); |
| std::unique_ptr<Aead> aead = |
| ExampleKeyTypeManager().GetPrimitive<Aead>(key).ValueOrDie(); |
| |
| std::string encryption = aead->Encrypt("Hi", "aad").ValueOrDie(); |
| std::string decryption = aead->Decrypt(encryption, "aad").ValueOrDie(); |
| EXPECT_THAT(decryption, Eq("Hi")); |
| } |
| |
| TEST(KeyManagerTest, CreateAeadVariant) { |
| AesGcmKeyFormat key_format; |
| key_format.set_key_size(16); |
| AesGcmKey key = ExampleKeyTypeManager().CreateKey(key_format).ValueOrDie(); |
| std::unique_ptr<AeadVariant> aead_variant = |
| ExampleKeyTypeManager().GetPrimitive<AeadVariant>(key).ValueOrDie(); |
| EXPECT_THAT(aead_variant->get(), Eq(key.key_value())); |
| } |
| |
| class NotRegistered {}; |
| TEST(KeyManagerTest, CreateFails) { |
| auto failing = |
| ExampleKeyTypeManager().GetPrimitive<NotRegistered>(AesGcmKey()); |
| EXPECT_THAT(failing.status(), test::StatusIs(util::error::INVALID_ARGUMENT)); |
| } |
| |
| class ExampleKeyTypeManagerWithoutFactory |
| : public KeyTypeManager<AesGcmKey, void, List<Aead, AeadVariant>> { |
| public: |
| class AeadFactory : public PrimitiveFactory<Aead> { |
| public: |
| crypto::tink::util::StatusOr<std::unique_ptr<Aead>> Create( |
| const AesGcmKey& key) const override { |
| // Ignore the key and returned one with a fixed size for this test. |
| return {subtle::AesGcmBoringSsl::New(key.key_value())}; |
| } |
| }; |
| |
| class AeadVariantFactory : public PrimitiveFactory<AeadVariant> { |
| public: |
| crypto::tink::util::StatusOr<std::unique_ptr<AeadVariant>> Create( |
| const AesGcmKey& key) const override { |
| return absl::make_unique<AeadVariant>(key.key_value()); |
| } |
| }; |
| |
| ExampleKeyTypeManagerWithoutFactory() |
| : KeyTypeManager(absl::make_unique<AeadFactory>(), |
| absl::make_unique<AeadVariantFactory>()) {} |
| |
| google::crypto::tink::KeyData::KeyMaterialType key_material_type() |
| const override { |
| return google::crypto::tink::KeyData::SYMMETRIC; |
| } |
| |
| uint32_t get_version() const override { return kVersion; } |
| |
| const std::string& get_key_type() const override { return key_type_; } |
| |
| util::Status ValidateKey(const AesGcmKey& key) const override { |
| util::Status status = ValidateVersion(key.version(), kVersion); |
| if (!status.ok()) return status; |
| return ValidateAesKeySize(key.key_value().size()); |
| } |
| |
| private: |
| static const int kVersion = 0; |
| const std::string key_type_ = "bla"; |
| }; |
| |
| TEST(KeyManagerWithoutFactoryTest, CreateAead) { |
| AesGcmKeyFormat key_format; |
| key_format.set_key_size(16); |
| AesGcmKey key = ExampleKeyTypeManager().CreateKey(key_format).ValueOrDie(); |
| std::unique_ptr<Aead> aead = ExampleKeyTypeManagerWithoutFactory() |
| .GetPrimitive<Aead>(key) |
| .ValueOrDie(); |
| |
| std::string encryption = aead->Encrypt("Hi", "aad").ValueOrDie(); |
| std::string decryption = aead->Decrypt(encryption, "aad").ValueOrDie(); |
| EXPECT_THAT(decryption, Eq("Hi")); |
| } |
| |
| TEST(KeyManagerWithoutFactoryTest, CreateAeadVariant) { |
| AesGcmKeyFormat key_format; |
| key_format.set_key_size(16); |
| AesGcmKey key = ExampleKeyTypeManager().CreateKey(key_format).ValueOrDie(); |
| std::unique_ptr<AeadVariant> aead_variant = |
| ExampleKeyTypeManager().GetPrimitive<AeadVariant>(key).ValueOrDie(); |
| EXPECT_THAT(aead_variant->get(), Eq(key.key_value())); |
| } |
| |
| TEST(KeyManagerWithoutFactoryTest, CreateFails) { |
| auto failing = |
| ExampleKeyTypeManagerWithoutFactory().GetPrimitive<NotRegistered>( |
| AesGcmKey()); |
| EXPECT_THAT(failing.status(), test::StatusIs(util::error::INVALID_ARGUMENT)); |
| } |
| |
| } // namespace |
| |
| } // namespace tink |
| } // namespace crypto |