| // 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/hybrid/internal/hpke_util_boringssl.h" |
| |
| #include "absl/status/status.h" |
| #include "absl/strings/str_cat.h" |
| #include "openssl/base.h" |
| #include "openssl/hpke.h" |
| #include "tink/hybrid/internal/hpke_util.h" |
| #include "tink/util/status.h" |
| #include "tink/util/statusor.h" |
| #include "proto/hpke.pb.h" |
| |
| namespace crypto { |
| namespace tink { |
| namespace internal { |
| |
| util::StatusOr<const EVP_HPKE_KEM*> KemParam(const HpkeParams& params) { |
| switch (params.kem) { |
| case HpkeKem::kX25519HkdfSha256: |
| return EVP_hpke_x25519_hkdf_sha256(); |
| default: |
| return util::Status( |
| absl::StatusCode::kInvalidArgument, |
| absl::StrCat("Unsupported HPKE KEM algorithm: ", params.kem)); |
| } |
| } |
| |
| util::StatusOr<const EVP_HPKE_KEM*> KemParam( |
| const google::crypto::tink::HpkeKem& kem) { |
| switch (kem) { |
| case google::crypto::tink::HpkeKem::DHKEM_X25519_HKDF_SHA256: |
| return EVP_hpke_x25519_hkdf_sha256(); |
| default: |
| return util::Status( |
| absl::StatusCode::kInvalidArgument, |
| absl::StrCat("Unsupported HPKE KEM algorithm: ", kem)); |
| } |
| } |
| |
| util::StatusOr<const EVP_HPKE_KEM*> KemParam( |
| const google::crypto::tink::HpkeParams& params) { |
| return KemParam(params.kem()); |
| } |
| |
| util::StatusOr<const EVP_HPKE_KDF*> KdfParam(const HpkeParams& params) { |
| switch (params.kdf) { |
| case HpkeKdf::kHkdfSha256: |
| return EVP_hpke_hkdf_sha256(); |
| default: |
| return util::Status( |
| absl::StatusCode::kInvalidArgument, |
| absl::StrCat("Unsupported HPKE KDF algorithm: ", params.kdf)); |
| } |
| } |
| |
| util::StatusOr<const EVP_HPKE_KDF*> KdfParam( |
| const google::crypto::tink::HpkeParams& params) { |
| switch (params.kdf()) { |
| case google::crypto::tink::HpkeKdf::HKDF_SHA256: |
| return EVP_hpke_hkdf_sha256(); |
| default: |
| return util::Status( |
| absl::StatusCode::kInvalidArgument, |
| absl::StrCat("Unsupported HPKE KDF algorithm: ", params.kdf())); |
| } |
| } |
| |
| util::StatusOr<const EVP_HPKE_AEAD*> AeadParam(const HpkeParams& params) { |
| switch (params.aead) { |
| case HpkeAead::kAes128Gcm: |
| return EVP_hpke_aes_128_gcm(); |
| case HpkeAead::kAes256Gcm: |
| return EVP_hpke_aes_256_gcm(); |
| case HpkeAead::kChaCha20Poly1305: |
| return EVP_hpke_chacha20_poly1305(); |
| default: |
| return util::Status( |
| absl::StatusCode::kInvalidArgument, |
| absl::StrCat("Unsupported HPKE AEAD algorithm: ", params.aead)); |
| } |
| } |
| |
| util::StatusOr<const EVP_HPKE_AEAD*> AeadParam( |
| const google::crypto::tink::HpkeParams& params) { |
| switch (params.aead()) { |
| case google::crypto::tink::HpkeAead::AES_128_GCM: |
| return EVP_hpke_aes_128_gcm(); |
| case google::crypto::tink::HpkeAead::AES_256_GCM: |
| return EVP_hpke_aes_256_gcm(); |
| case google::crypto::tink::HpkeAead::CHACHA20_POLY1305: |
| return EVP_hpke_chacha20_poly1305(); |
| default: |
| return util::Status( |
| absl::StatusCode::kInvalidArgument, |
| absl::StrCat("Unsupported HPKE AEAD algorithm: ", params.aead())); |
| } |
| } |
| |
| } // namespace internal |
| } // namespace tink |
| } // namespace crypto |