base/crypto/signature_creator.h

   1 // Copyright (c) 2009 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 BASE_CRYPTO_SIGNATURE_CREATOR_H_
   6 #define BASE_CRYPTO_SIGNATURE_CREATOR_H_
   7 #pragma once
   8
   9 #include "build/build_config.h"
  10
  11 #if defined(USE_NSS)
  12 // Forward declaration.
  13 struct SGNContextStr;
  14 #elif defined(OS_MACOSX)
  15 #include <Security/cssm.h>
  16 #endif
  17
  18 #include <vector>
  19
  20 #include "base/basictypes.h"
  21 #include "base/crypto/rsa_private_key.h"
  22
  23 #if defined(OS_WIN)
  24 #include "base/crypto/scoped_capi_types.h"
  25 #endif
  26
  27 namespace base {
  28
  29 // Signs data using a bare private key (as opposed to a full certificate).
  30 // Currently can only sign data using SHA-1 with RSA encryption.
  31 class SignatureCreator {
  32  public:
  33   // Create an instance. The caller must ensure that the provided PrivateKey
  34   // instance outlives the created SignatureCreator.
  35   static SignatureCreator* Create(RSAPrivateKey* key);
  36
  37   ~SignatureCreator();
  38
  39   // Update the signature with more data.
  40   bool Update(const uint8* data_part, int data_part_len);
  41
  42   // Finalize the signature.
  43   bool Final(std::vector<uint8>* signature);
  44
  45  private:
  46   // Private constructor. Use the Create() method instead.
  47   SignatureCreator();
  48
  49   RSAPrivateKey* key_;
  50
  51 #if defined(USE_NSS)
  52   SGNContextStr* sign_context_;
  53 #elif defined(OS_MACOSX)
  54   CSSM_CC_HANDLE sig_handle_;
  55 #elif defined(OS_WIN)
  56   ScopedHCRYPTHASH hash_object_;
  57 #endif
  58
  59   DISALLOW_COPY_AND_ASSIGN(SignatureCreator);
  60 };
  61
  62 }  // namespace base
  63
  64 #endif  // BASE_CRYPTO_SIGNATURE_CREATOR_H_