| // 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 "tink/hybrid/hybrid_key_templates.h" |
| |
| #include "absl/strings/string_view.h" |
| #include "tink/aead/aead_key_templates.h" |
| #include "proto/ecies_aead_hkdf.pb.h" |
| #include "proto/common.pb.h" |
| #include "proto/tink.pb.h" |
| |
| namespace crypto { |
| namespace tink { |
| namespace { |
| |
| using google::crypto::tink::EciesAeadHkdfKeyFormat; |
| using google::crypto::tink::EcPointFormat; |
| using google::crypto::tink::EllipticCurveType; |
| using google::crypto::tink::HashType; |
| using google::crypto::tink::KeyTemplate; |
| using google::crypto::tink::OutputPrefixType; |
| |
| KeyTemplate* NewEciesAeadHkdfKeyTemplate( |
| EllipticCurveType curve_type, |
| HashType hkdf_hash_type, |
| EcPointFormat ec_point_format, |
| const KeyTemplate& dem_key_template, |
| absl::string_view hkdf_salt) { |
| KeyTemplate* key_template = new KeyTemplate; |
| key_template->set_type_url( |
| "type.googleapis.com/google.crypto.tink.EciesAeadHkdfPrivateKey"); |
| key_template->set_output_prefix_type(OutputPrefixType::TINK); |
| EciesAeadHkdfKeyFormat key_format; |
| key_format.mutable_params()->set_ec_point_format(ec_point_format); |
| auto dem_params = key_format.mutable_params()->mutable_dem_params(); |
| *(dem_params->mutable_aead_dem()) = dem_key_template; |
| auto kem_params = key_format.mutable_params()->mutable_kem_params(); |
| kem_params->set_curve_type(curve_type); |
| kem_params->set_hkdf_hash_type(hkdf_hash_type); |
| kem_params->set_hkdf_salt(std::string(hkdf_salt)); |
| key_format.SerializeToString(key_template->mutable_value()); |
| return key_template; |
| } |
| |
| } // anonymous namespace |
| |
| // static |
| const KeyTemplate& HybridKeyTemplates::EciesP256HkdfHmacSha256Aes128Gcm() { |
| static const KeyTemplate* key_template = |
| NewEciesAeadHkdfKeyTemplate(EllipticCurveType::NIST_P256, |
| HashType::SHA256, |
| EcPointFormat::UNCOMPRESSED, |
| AeadKeyTemplates::Aes128Gcm(), |
| /* hkdf_salt= */ ""); |
| return *key_template; |
| } |
| |
| // static |
| const KeyTemplate& |
| HybridKeyTemplates::EciesP256HkdfHmacSha256Aes128CtrHmacSha256() { |
| static const KeyTemplate* key_template = |
| NewEciesAeadHkdfKeyTemplate(EllipticCurveType::NIST_P256, |
| HashType::SHA256, |
| EcPointFormat::UNCOMPRESSED, |
| AeadKeyTemplates::Aes128CtrHmacSha256(), |
| /* hkdf_salt= */ ""); |
| return *key_template; |
| } |
| |
| |
| } // namespace tink |
| } // namespace crypto |