| // 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/prf/prf_key_templates.h" |
| |
| #include "absl/memory/memory.h" |
| #include "tink/prf/aes_cmac_prf_key_manager.h" |
| #include "tink/prf/hkdf_prf_key_manager.h" |
| #include "tink/prf/hmac_prf_key_manager.h" |
| #include "proto/aes_cmac_prf.pb.h" |
| #include "proto/hkdf_prf.pb.h" |
| #include "proto/hmac_prf.pb.h" |
| |
| namespace crypto { |
| namespace tink { |
| |
| namespace { |
| |
| using google::crypto::tink::AesCmacPrfKeyFormat; |
| using google::crypto::tink::HkdfPrfKeyFormat; |
| using google::crypto::tink::HmacPrfKeyFormat; |
| |
| std::unique_ptr<google::crypto::tink::KeyTemplate> NewHkdfSha256Template() { |
| auto key_template = absl::make_unique<google::crypto::tink::KeyTemplate>(); |
| auto hkdf_prf_key_manager = absl::make_unique<HkdfPrfKeyManager>(); |
| key_template->set_type_url(hkdf_prf_key_manager->get_key_type()); |
| key_template->set_output_prefix_type( |
| google::crypto::tink::OutputPrefixType::RAW); |
| HkdfPrfKeyFormat key_format; |
| key_format.set_key_size(32); |
| key_format.set_version(hkdf_prf_key_manager->get_version()); |
| key_format.mutable_params()->set_hash(google::crypto::tink::HashType::SHA256); |
| key_format.SerializeToString(key_template->mutable_value()); |
| return key_template; |
| } |
| |
| std::unique_ptr<google::crypto::tink::KeyTemplate> NewHmacTemplate( |
| google::crypto::tink::HashType hash_type, uint32_t key_size) { |
| auto key_template = absl::make_unique<google::crypto::tink::KeyTemplate>(); |
| auto hmac_prf_key_manager = absl::make_unique<HmacPrfKeyManager>(); |
| key_template->set_type_url(hmac_prf_key_manager->get_key_type()); |
| key_template->set_output_prefix_type( |
| google::crypto::tink::OutputPrefixType::RAW); |
| HmacPrfKeyFormat key_format; |
| key_format.set_key_size(key_size); |
| key_format.set_version(hmac_prf_key_manager->get_version()); |
| key_format.mutable_params()->set_hash(hash_type); |
| key_format.SerializeToString(key_template->mutable_value()); |
| return key_template; |
| } |
| |
| std::unique_ptr<google::crypto::tink::KeyTemplate> NewAesCmacTemplate() { |
| auto key_template = absl::make_unique<google::crypto::tink::KeyTemplate>(); |
| auto aes_cmac_prf_key_manager = absl::make_unique<AesCmacPrfKeyManager>(); |
| key_template->set_type_url(aes_cmac_prf_key_manager->get_key_type()); |
| key_template->set_output_prefix_type( |
| google::crypto::tink::OutputPrefixType::RAW); |
| AesCmacPrfKeyFormat key_format; |
| key_format.set_version(aes_cmac_prf_key_manager->get_version()); |
| key_format.set_key_size(32); |
| key_format.SerializeToString(key_template->mutable_value()); |
| return key_template; |
| } |
| |
| } // namespace |
| |
| const google::crypto::tink::KeyTemplate& PrfKeyTemplates::HkdfSha256() { |
| static const google::crypto::tink::KeyTemplate* key_template = |
| NewHkdfSha256Template().release(); |
| return *key_template; |
| } |
| |
| const google::crypto::tink::KeyTemplate& PrfKeyTemplates::HmacSha256() { |
| static const google::crypto::tink::KeyTemplate* key_template = |
| NewHmacTemplate(google::crypto::tink::HashType::SHA256, 32).release(); |
| return *key_template; |
| } |
| |
| const google::crypto::tink::KeyTemplate& PrfKeyTemplates::HmacSha512() { |
| static const google::crypto::tink::KeyTemplate* key_template = |
| NewHmacTemplate(google::crypto::tink::HashType::SHA512, 64).release(); |
| return *key_template; |
| } |
| |
| const google::crypto::tink::KeyTemplate& PrfKeyTemplates::AesCmac() { |
| static const google::crypto::tink::KeyTemplate* key_template = |
| NewAesCmacTemplate().release(); |
| return *key_template; |
| } |
| |
| } // namespace tink |
| } // namespace crypto |