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// Copyright 2017 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.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef TINK_SUBTLE_ECDSA_SIGN_BORINGSSL_H_
#define TINK_SUBTLE_ECDSA_SIGN_BORINGSSL_H_
#include <memory>
#include "absl/strings/string_view.h"
#include "tink/subtle/common_enums.h"
#include "tink/subtle/subtle_util_boringssl.h"
#include "tink/public_key_sign.h"
#include "tink/util/statusor.h"
#include "openssl/ec.h"
#include "openssl/evp.h"
namespace crypto {
namespace tink {
namespace subtle {
// ECDSA signing using Boring SSL, generating signatures in DER-encoding.
class EcdsaSignBoringSsl : public PublicKeySign {
public:
static crypto::tink::util::StatusOr<std::unique_ptr<EcdsaSignBoringSsl>> New(
const SubtleUtilBoringSSL::EcKey& ec_key, HashType hash_type,
EcdsaSignatureEncoding encoding);
// Computes the signature for 'data'.
crypto::tink::util::StatusOr<std::string> Sign(
absl::string_view data) const override;
virtual ~EcdsaSignBoringSsl() {}
private:
EcdsaSignBoringSsl(bssl::UniquePtr<EC_KEY> key, const EVP_MD* hash,
EcdsaSignatureEncoding encoding);
bssl::UniquePtr<EC_KEY> key_;
const EVP_MD* hash_; // Owned by BoringSSL.
EcdsaSignatureEncoding encoding_;
};
} // namespace subtle
} // namespace tink
} // namespace crypto
#endif // TINK_SUBTLE_ECDSA_SIGN_BORINGSSL_H_