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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CRYPTO_SIGNATURE_CREATOR_H_
#define CRYPTO_SIGNATURE_CREATOR_H_
#pragma once
#include "build/build_config.h"
#if defined(USE_OPENSSL)
// Forward declaration for openssl/*.h
typedef struct env_md_ctx_st EVP_MD_CTX;
#elif defined(USE_NSS)
// Forward declaration.
struct SGNContextStr;
#elif defined(OS_MACOSX)
#include <Security/cssm.h>
#endif
#include <vector>
#include "base/basictypes.h"
#include "crypto/rsa_private_key.h"
#if defined(OS_WIN)
#include "crypto/scoped_capi_types.h"
#endif
namespace crypto {
// Signs data using a bare private key (as opposed to a full certificate).
// Currently can only sign data using SHA-1 with RSA encryption.
class SignatureCreator {
public:
~SignatureCreator();
// Create an instance. The caller must ensure that the provided PrivateKey
// instance outlives the created SignatureCreator.
static SignatureCreator* Create(RSAPrivateKey* key);
// Update the signature with more data.
bool Update(const uint8* data_part, int data_part_len);
// Finalize the signature.
bool Final(std::vector<uint8>* signature);
private:
// Private constructor. Use the Create() method instead.
SignatureCreator();
RSAPrivateKey* key_;
#if defined(USE_OPENSSL)
EVP_MD_CTX* sign_context_;
#elif defined(USE_NSS)
SGNContextStr* sign_context_;
#elif defined(OS_MACOSX)
CSSM_CC_HANDLE sig_handle_;
#elif defined(OS_WIN)
ScopedHCRYPTHASH hash_object_;
#endif
DISALLOW_COPY_AND_ASSIGN(SignatureCreator);
};
} // namespace crypto
#endif // CRYPTO_SIGNATURE_CREATOR_H_
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