blob: bfe0719d1cb52ea2dee7d9faf9a3cbb8fc7c449f [file] [log] [blame]
// 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/aead/internal/aead_util.h"
#include "absl/status/status.h"
#include "openssl/evp.h"
#include "tink/util/errors.h"
#include "tink/util/statusor.h"
namespace crypto {
namespace tink {
namespace internal {
util::StatusOr<const EVP_CIPHER *> GetAesGcmCipherForKeySize(
uint32_t key_size_in_bytes) {
switch (key_size_in_bytes) {
case 16:
return EVP_aes_128_gcm();
case 32:
return EVP_aes_256_gcm();
default:
return ToStatusF(absl::StatusCode::kInvalidArgument,
"Invalid key size %d", key_size_in_bytes);
}
}
#ifdef OPENSSL_IS_BORINGSSL
util::StatusOr<const EVP_AEAD *> GetAesGcmAeadForKeySize(
uint32_t key_size_in_bytes) {
switch (key_size_in_bytes) {
case 16:
return EVP_aead_aes_128_gcm();
case 32:
return EVP_aead_aes_256_gcm();
default:
return ToStatusF(absl::StatusCode::kInvalidArgument,
"Invalid key size %d", key_size_in_bytes);
}
}
util::StatusOr<const EVP_AEAD *> GetAesGcmSivAeadCipherForKeySize(
int key_size_in_bytes) {
switch (key_size_in_bytes) {
case 16:
return EVP_aead_aes_128_gcm_siv();
case 32:
return EVP_aead_aes_256_gcm_siv();
default:
return ToStatusF(
absl::StatusCode::kInvalidArgument,
"Invalid key size; valid values are {16, 32} bytes, got %d",
key_size_in_bytes);
}
}
#endif
} // namespace internal
} // namespace tink
} // namespace crypto