1// Copyright (c) 2011 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CRYPTO_SIGNATURE_CREATOR_H_
6#define CRYPTO_SIGNATURE_CREATOR_H_
7#pragma once
8
9#include "build/build_config.h"
10
11#if defined(USE_OPENSSL)
12// Forward declaration for openssl/*.h
13typedef struct env_md_ctx_st EVP_MD_CTX;
14#elif defined(USE_NSS)
15// Forward declaration.
16struct SGNContextStr;
17#elif defined(OS_MACOSX)
18#include <Security/cssm.h>
19#endif
20
21#include <vector>
22
23#include "base/basictypes.h"
24#include "crypto/rsa_private_key.h"
25
26#if defined(OS_WIN)
27#include "crypto/scoped_capi_types.h"
28#endif
29
30namespace crypto {
31
32// Signs data using a bare private key (as opposed to a full certificate).
33// Currently can only sign data using SHA-1 with RSA encryption.
34class SignatureCreator {
35 public:
36  ~SignatureCreator();
37
38  // Create an instance. The caller must ensure that the provided PrivateKey
39  // instance outlives the created SignatureCreator.
40  static SignatureCreator* Create(RSAPrivateKey* key);
41
42  // Update the signature with more data.
43  bool Update(const uint8* data_part, int data_part_len);
44
45  // Finalize the signature.
46  bool Final(std::vector<uint8>* signature);
47
48 private:
49  // Private constructor. Use the Create() method instead.
50  SignatureCreator();
51
52  RSAPrivateKey* key_;
53
54#if defined(USE_OPENSSL)
55  EVP_MD_CTX* sign_context_;
56#elif defined(USE_NSS)
57  SGNContextStr* sign_context_;
58#elif defined(OS_MACOSX)
59  CSSM_CC_HANDLE sig_handle_;
60#elif defined(OS_WIN)
61  ScopedHCRYPTHASH hash_object_;
62#endif
63
64  DISALLOW_COPY_AND_ASSIGN(SignatureCreator);
65};
66
67}  // namespace crypto
68
69#endif  // CRYPTO_SIGNATURE_CREATOR_H_
70