blob: c221e7bc0ba532de9b5a5ee8d3ab88dfb9d72e8b [file] [log] [blame]
// Copyright (c) 2012 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.
#include <vector>
#include "build/build_config.h"
#include "base/basictypes.h"
#include "crypto/crypto_export.h"
#if defined(USE_OPENSSL)
// Forward declaration for openssl/*.h
typedef struct env_md_ctx_st EVP_MD_CTX;
#elif defined(USE_NSS) || defined(OS_WIN) || defined(OS_MACOSX)
// Forward declaration.
struct SGNContextStr;
namespace crypto {
class RSAPrivateKey;
// Signs data using a bare private key (as opposed to a full certificate).
// Currently can only sign data using SHA-1 or SHA-256 with RSA PKCS#1v1.5.
class CRYPTO_EXPORT SignatureCreator {
// The set of supported hash functions. Extend as required.
enum HashAlgorithm {
// Create an instance. The caller must ensure that the provided PrivateKey
// instance outlives the created SignatureCreator. Uses the HashAlgorithm
// specified.
static SignatureCreator* Create(RSAPrivateKey* key, HashAlgorithm hash_alg);
// Signs the precomputed |hash_alg| digest |data| using private |key| as
// specified in PKCS #1 v1.5.
static bool Sign(RSAPrivateKey* key,
HashAlgorithm hash_alg,
const uint8* data,
int data_len,
std::vector<uint8>* signature);
// 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 constructor. Use the Create() method instead.
#if defined(USE_OPENSSL)
EVP_MD_CTX* sign_context_;
#elif defined(USE_NSS) || defined(OS_WIN) || defined(OS_MACOSX)
SGNContextStr* sign_context_;
} // namespace crypto