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// 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.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef TINK_SUBTLE_RSA_SSA_PSS_SIGN_BORINGSSL_H_
#define TINK_SUBTLE_RSA_SSA_PSS_SIGN_BORINGSSL_H_
#include <memory>
#include <string>
#include <utility>
#include "absl/strings/string_view.h"
#include "openssl/ec.h"
#include "openssl/rsa.h"
#include "tink/internal/fips_utils.h"
#include "tink/internal/rsa_util.h"
#include "tink/internal/ssl_unique_ptr.h"
#include "tink/public_key_sign.h"
#include "tink/subtle/common_enums.h"
#include "tink/util/statusor.h"
namespace crypto {
namespace tink {
namespace subtle {
// The RSA SSA (Signature Schemes with Appendix) using PSS (Probabilistic
// Signature Scheme) encoding is defined at
// https://tools.ietf.org/html/rfc8017#section-8.1).
class RsaSsaPssSignBoringSsl : public PublicKeySign {
public:
static crypto::tink::util::StatusOr<std::unique_ptr<PublicKeySign>> New(
const crypto::tink::internal::RsaPrivateKey& private_key,
const crypto::tink::internal::RsaSsaPssParams& params);
~RsaSsaPssSignBoringSsl() override = default;
crypto::tink::util::StatusOr<std::string> Sign(
absl::string_view data) const override;
static constexpr crypto::tink::internal::FipsCompatibility kFipsStatus =
crypto::tink::internal::FipsCompatibility::kRequiresBoringCrypto;
private:
RsaSsaPssSignBoringSsl(crypto::tink::internal::SslUniquePtr<RSA> private_key,
const EVP_MD* sig_hash, const EVP_MD* mgf1_hash,
int32_t salt_length)
: private_key_(std::move(private_key)),
sig_hash_(sig_hash),
mgf1_hash_(mgf1_hash),
salt_length_(salt_length) {}
const crypto::tink::internal::SslUniquePtr<RSA> private_key_;
// Pointers to singletons owned by OpenSSL/BoringSSL.
const EVP_MD* sig_hash_;
const EVP_MD* mgf1_hash_;
const int32_t salt_length_;
};
} // namespace subtle
} // namespace tink
} // namespace crypto
#endif // TINK_SUBTLE_RSA_SSA_PSS_SIGN_BORINGSSL_H_
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