| // 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 <algorithm> |
| #include <vector> |
| |
| #ifndef THIRD_PARTY_TINK_CC_SIGNATURE_RSA_SSA_PSS_VERIFY_KEY_MANAGER_H_ |
| #define THIRD_PARTY_TINK_CC_SIGNATURE_RSA_SSA_PSS_VERIFY_KEY_MANAGER_H_ |
| |
| #include "absl/strings/string_view.h" |
| #include "tink/key_manager.h" |
| #include "tink/public_key_verify.h" |
| #include "tink/util/errors.h" |
| #include "tink/util/protobuf_helper.h" |
| #include "tink/util/status.h" |
| #include "tink/util/statusor.h" |
| #include "proto/rsa_ssa_pss.pb.h" |
| #include "proto/tink.pb.h" |
| |
| namespace crypto { |
| namespace tink { |
| |
| class RsaSsaPssVerifyKeyManager : public KeyManager<PublicKeyVerify> { |
| public: |
| static constexpr char kKeyType[] = |
| "type.googleapis.com/google.crypto.tink.RsaSsaPssPublicKey"; |
| static constexpr uint32_t kVersion = 0; |
| |
| RsaSsaPssVerifyKeyManager(); |
| |
| // Constructs an instance of RsaSsaPss PublicKeyVerify |
| // for the given 'key_data', which must contain RsaSsaPssPublicKey-proto. |
| crypto::tink::util::StatusOr<std::unique_ptr<PublicKeyVerify>> GetPrimitive( |
| const google::crypto::tink::KeyData& key_data) const override; |
| |
| // Constructs an instance of RsaSsaPss PublicKeyVerify |
| // for the given 'key', which must be RsaSsaPssPublicKey-proto. |
| crypto::tink::util::StatusOr<std::unique_ptr<PublicKeyVerify>> GetPrimitive( |
| const portable_proto::MessageLite& key) const override; |
| |
| // Returns the type_url identifying the key type handled by this manager. |
| const std::string& get_key_type() const override; |
| |
| // Returns the version of this key manager. |
| uint32_t get_version() const override; |
| |
| // Returns a factory that generates keys of the key type |
| // handled by this manager. |
| const KeyFactory& get_key_factory() const override; |
| |
| virtual ~RsaSsaPssVerifyKeyManager() {} |
| |
| private: |
| // To reach 128-bit security strength, RSA's modulus must be at least 3072-bit |
| // while 2048-bit RSA key only has 112-bit security. Nevertheless, a 2048-bit |
| // RSA key is considered safe by NIST until 2030 (see |
| // https://www.keylength.com/en/4/). |
| static const size_t kMinModulusSizeInBits = 2048; |
| static constexpr char kKeyTypePrefix[] = "type.googleapis.com/"; |
| static constexpr char kKeyFormatUrl[] = |
| "type.googleapis.com/google.crypto.tink.RsaSsaPssKeyFormat"; |
| |
| std::string key_type_; |
| std::unique_ptr<KeyFactory> key_factory_; |
| |
| // Constructs an instance of RsaSsaPss PublicKeyVerify |
| // for the given 'key'. |
| crypto::tink::util::StatusOr<std::unique_ptr<PublicKeyVerify>> |
| GetPrimitiveImpl(const google::crypto::tink::RsaSsaPssPublicKey& |
| rsa_ssa_pss_public_key) const; |
| |
| static crypto::tink::util::Status Validate( |
| const google::crypto::tink::RsaSsaPssParams& params); |
| static crypto::tink::util::Status Validate( |
| const google::crypto::tink::RsaSsaPssPublicKey& key); |
| static crypto::tink::util::Status Validate( |
| const google::crypto::tink::RsaSsaPssKeyFormat& key_format); |
| }; |
| |
| } // namespace tink |
| } // namespace crypto |
| |
| #endif // THIRD_PARTY_TINK_CC_SIGNATURE_RSA_SSA_PSS_VERIFY_KEY_MANAGER_H_ |