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 #include "crypto/signature_creator.h" 6 7 #include "base/logging.h" 8 #include "base/memory/scoped_ptr.h" 9 10 namespace crypto { 11 12 // static 13 SignatureCreator* SignatureCreator::Create(RSAPrivateKey* key) { 14 scoped_ptr<SignatureCreator> result(new SignatureCreator); 15 result->key_ = key; 16 17 if (!CryptCreateHash(key->provider(), CALG_SHA1, 0, 0, 18 result->hash_object_.receive())) { 19 NOTREACHED(); 20 return NULL; 21 } 22 23 return result.release(); 24 } 25 26 SignatureCreator::SignatureCreator() : hash_object_(0) {} 27 28 SignatureCreator::~SignatureCreator() {} 29 30 bool SignatureCreator::Update(const uint8* data_part, int data_part_len) { 31 if (!CryptHashData(hash_object_, data_part, data_part_len, 0)) { 32 NOTREACHED(); 33 return false; 34 } 35 36 return true; 37 } 38 39 bool SignatureCreator::Final(std::vector<uint8>* signature) { 40 DWORD signature_length = 0; 41 if (!CryptSignHash(hash_object_, AT_SIGNATURE, NULL, 0, NULL, 42 &signature_length)) { 43 return false; 44 } 45 46 std::vector<uint8> temp; 47 temp.resize(signature_length); 48 if (!CryptSignHash(hash_object_, AT_SIGNATURE, NULL, 0, &temp.front(), 49 &signature_length)) { 50 return false; 51 } 52 53 temp.resize(signature_length); 54 for (size_t i = temp.size(); i > 0; --i) 55 signature->push_back(temp[i - 1]); 56 57 return true; 58 } 59 60 } // namespace crypto 61
