| // 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 "absl/memory/memory.h" |
| #include "absl/strings/str_cat.h" |
| #include "absl/strings/string_view.h" |
| #include "tink/experimental/pqcrypto/signature/falcon_verify_key_manager.h" |
| #include "tink/experimental/pqcrypto/signature/subtle/falcon_sign.h" |
| #include "tink/experimental/pqcrypto/signature/subtle/falcon_subtle_utils.h" |
| #include "tink/public_key_sign.h" |
| #include "tink/util/errors.h" |
| #include "tink/util/input_stream_util.h" |
| #include "tink/util/protobuf_helper.h" |
| #include "tink/util/secret_data.h" |
| #include "tink/util/status.h" |
| #include "tink/util/statusor.h" |
| #include "tink/util/validation.h" |
| |
| namespace crypto { |
| namespace tink { |
| |
| using ::crypto::tink::subtle::FalconKeyPair; |
| using ::crypto::tink::subtle::FalconPrivateKeyPqclean; |
| using ::crypto::tink::util::Status; |
| using ::crypto::tink::util::StatusOr; |
| using ::google::crypto::tink::FalconKeyFormat; |
| using ::google::crypto::tink::FalconPrivateKey; |
| using ::google::crypto::tink::FalconPublicKey; |
| |
| StatusOr<FalconPrivateKey> FalconSignKeyManager::CreateKey( |
| const FalconKeyFormat& key_format) const { |
| util::StatusOr<FalconKeyPair> key_pair = |
| subtle::GenerateFalconKeyPair(key_format.key_size()); |
| |
| if (!key_pair.status().ok()) { |
| return key_pair.status(); |
| } |
| |
| FalconPrivateKey falcon_private_key; |
| falcon_private_key.set_version(get_version()); |
| falcon_private_key.set_key_value( |
| util::SecretDataAsStringView(key_pair->GetPrivateKey().GetKey())); |
| |
| FalconPublicKey* falcon_public_key = falcon_private_key.mutable_public_key(); |
| falcon_public_key->set_version(get_version()); |
| falcon_public_key->set_key_value(key_pair->GetPublicKey().GetKey()); |
| |
| return falcon_private_key; |
| } |
| |
| StatusOr<std::unique_ptr<PublicKeySign>> |
| FalconSignKeyManager::PublicKeySignFactory::Create( |
| const FalconPrivateKey& private_key) const { |
| util::SecretData sk_data = |
| util::SecretDataFromStringView(private_key.key_value()); |
| |
| util::StatusOr<FalconPrivateKeyPqclean> falcon_private_key = |
| FalconPrivateKeyPqclean::NewPrivateKey(sk_data); |
| |
| if (!falcon_private_key.ok()) { |
| return falcon_private_key.status(); |
| } |
| |
| return subtle::FalconSign::New(*falcon_private_key); |
| } |
| |
| Status FalconSignKeyManager::ValidateKey(const FalconPrivateKey& key) const { |
| Status status = ValidateVersion(key.version(), get_version()); |
| if (!status.ok()) { |
| return status; |
| } |
| |
| status = subtle::ValidateFalconPrivateKeySize(key.key_value().length()); |
| if (!status.ok()) { |
| return status; |
| } |
| |
| return FalconVerifyKeyManager().ValidateKey(key.public_key()); |
| } |
| |
| Status FalconSignKeyManager::ValidateKeyFormat( |
| const FalconKeyFormat& key_format) const { |
| Status status = subtle::ValidateFalconPrivateKeySize(key_format.key_size()); |
| if (!status.ok()) { |
| return status; |
| } |
| |
| return util::OkStatus(); |
| } |
| |
| } // namespace tink |
| } // namespace crypto |