| // 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 "pqcrypto/cc/hybrid/cecpq2_hybrid_key_templates.h" |
| |
| #include "absl/strings/string_view.h" |
| #include "tink/aead/aead_key_templates.h" |
| #include "tink/daead/deterministic_aead_key_templates.h" |
| #include "pqcrypto/proto/cecpq2_aead_hkdf.pb.h" |
| #include "proto/common.pb.h" |
| #include "proto/tink.pb.h" |
| |
| namespace crypto { |
| namespace tink { |
| namespace { |
| |
| using google::crypto::tink::Cecpq2AeadHkdfKeyFormat; |
| 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* NewCecpq2AeadHkdfKeyTemplate(EllipticCurveType curve_type, |
| HashType hkdf_hash_type, |
| EcPointFormat ec_point_format, |
| const KeyTemplate& dem_key_template, |
| OutputPrefixType prefix_type, |
| absl::string_view hkdf_salt) { |
| KeyTemplate* key_template = new KeyTemplate; |
| key_template->set_type_url( |
| "type.googleapis.com/google.crypto.tink.Cecpq2AeadHkdfPrivateKey"); |
| key_template->set_output_prefix_type(prefix_type); |
| google::crypto::tink::Cecpq2AeadHkdfKeyFormat key_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); |
| std::string hkdf_salt_str(hkdf_salt.data(), hkdf_salt.size()); |
| kem_params->set_hkdf_salt(hkdf_salt_str); |
| kem_params->set_ec_point_format(ec_point_format); |
| key_format.SerializeToString(key_template->mutable_value()); |
| return key_template; |
| } |
| |
| } // anonymous namespace |
| |
| const KeyTemplate& Cecpq2HybridKeyTemplateX25519HkdfHmacSha256Aes256Gcm() { |
| static const KeyTemplate* key_template = NewCecpq2AeadHkdfKeyTemplate( |
| EllipticCurveType::CURVE25519, HashType::SHA256, |
| EcPointFormat::COMPRESSED, AeadKeyTemplates::Aes256Gcm(), |
| OutputPrefixType::TINK, |
| /* hkdf_salt= */ ""); |
| return *key_template; |
| } |
| |
| const KeyTemplate& |
| Cecpq2HybridKeyTemplateX25519HkdfHmacSha256XChaCha20Poly1305() { |
| static const KeyTemplate* key_template = NewCecpq2AeadHkdfKeyTemplate( |
| EllipticCurveType::CURVE25519, HashType::SHA256, |
| EcPointFormat::COMPRESSED, AeadKeyTemplates::XChaCha20Poly1305(), |
| OutputPrefixType::TINK, |
| /* hkdf_salt= */ ""); |
| return *key_template; |
| } |
| |
| const google::crypto::tink::KeyTemplate& |
| Cecpq2HybridKeyTemplateX25519HkdfHmacSha256DeterministicAesSiv() { |
| static const KeyTemplate* key_template = NewCecpq2AeadHkdfKeyTemplate( |
| EllipticCurveType::CURVE25519, HashType::SHA256, |
| EcPointFormat::COMPRESSED, DeterministicAeadKeyTemplates::Aes256Siv(), |
| OutputPrefixType::TINK, |
| /* hkdf_salt= */ ""); |
| return *key_template; |
| } |
| |
| } // namespace tink |
| } // namespace crypto |