| // 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/dilithium_sign_key_manager.h" |
| |
| #include "absl/memory/memory.h" |
| #include "absl/status/status.h" |
| #include "absl/strings/str_cat.h" |
| #include "absl/strings/string_view.h" |
| #include "tink/experimental/pqcrypto/signature/dilithium_verify_key_manager.h" |
| #include "tink/experimental/pqcrypto/signature/subtle/dilithium_avx2_sign.h" |
| #include "tink/experimental/pqcrypto/signature/subtle/dilithium_key.h" |
| #include "tink/experimental/pqcrypto/signature/util/enums.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" |
| |
| extern "C" { |
| #include "third_party/pqclean/crypto_sign/dilithium2/api.h" |
| #include "third_party/pqclean/crypto_sign/dilithium3/api.h" |
| #include "third_party/pqclean/crypto_sign/dilithium5/api.h" |
| } |
| |
| namespace crypto { |
| namespace tink { |
| |
| using ::crypto::tink::subtle::DilithiumPrivateKeyPqclean; |
| using ::crypto::tink::subtle::DilithiumPublicKeyPqclean; |
| using ::crypto::tink::util::EnumsPqcrypto; |
| using ::crypto::tink::util::Status; |
| using ::crypto::tink::util::StatusOr; |
| using ::google::crypto::tink::DilithiumKeyFormat; |
| using ::google::crypto::tink::DilithiumPrivateKey; |
| using ::google::crypto::tink::DilithiumPublicKey; |
| |
| StatusOr<DilithiumPrivateKey> DilithiumSignKeyManager::CreateKey( |
| const DilithiumKeyFormat& key_format) const { |
| DilithiumPrivateKey dilithium_sk; |
| dilithium_sk.set_version(get_version()); |
| |
| DilithiumPublicKey* dilithium_pk = dilithium_sk.mutable_public_key(); |
| dilithium_pk->set_version(get_version()); |
| |
| util::StatusOr< |
| std::pair<DilithiumPrivateKeyPqclean, DilithiumPublicKeyPqclean>> |
| key_pair = DilithiumPrivateKeyPqclean::GenerateKeyPair( |
| key_format.params().key_size(), |
| EnumsPqcrypto::ProtoToSubtle(key_format.params().seed_expansion())); |
| if (!key_pair.status().ok()) { |
| return key_pair.status(); |
| } |
| |
| dilithium_sk.set_key_value( |
| util::SecretDataAsStringView(key_pair->first.GetKeyData())); |
| dilithium_pk->set_key_value(key_pair->second.GetKeyData()); |
| *(dilithium_pk->mutable_params()) = key_format.params(); |
| |
| return dilithium_sk; |
| } |
| |
| StatusOr<std::unique_ptr<PublicKeySign>> |
| DilithiumSignKeyManager::PublicKeySignFactory::Create( |
| const DilithiumPrivateKey& private_key) const { |
| util::SecretData sk_data = |
| util::SecretDataFromStringView(private_key.key_value()); |
| |
| util::StatusOr<DilithiumPrivateKeyPqclean> dilithium_private_key = |
| DilithiumPrivateKeyPqclean::NewPrivateKey( |
| sk_data, EnumsPqcrypto::ProtoToSubtle( |
| private_key.public_key().params().seed_expansion())); |
| |
| if (!dilithium_private_key.ok()) return dilithium_private_key.status(); |
| |
| return subtle::DilithiumAvx2Sign::New(*dilithium_private_key); |
| } |
| |
| Status DilithiumSignKeyManager::ValidateKey( |
| const DilithiumPrivateKey& key) const { |
| Status status = ValidateVersion(key.version(), get_version()); |
| if (!status.ok()) return status; |
| if (key.key_value().length() != PQCLEAN_DILITHIUM2_CRYPTO_SECRETKEYBYTES && |
| key.key_value().length() != PQCLEAN_DILITHIUM3_CRYPTO_SECRETKEYBYTES && |
| key.key_value().length() != PQCLEAN_DILITHIUM5_CRYPTO_SECRETKEYBYTES) { |
| return Status(absl::StatusCode::kInvalidArgument, |
| "Invalid dilithium private key size."); |
| } |
| |
| return util::OkStatus(); |
| } |
| |
| Status DilithiumSignKeyManager::ValidateKeyFormat( |
| const DilithiumKeyFormat& key_format) const { |
| if (!key_format.has_params()) { |
| return Status(absl::StatusCode::kInvalidArgument, "Missing params."); |
| } |
| |
| return DilithiumVerifyKeyManager().ValidateParams(key_format.params()); |
| } |
| |
| } // namespace tink |
| } // namespace crypto |