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| 1 // Copyright (c) 2012 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 #include "crypto/rsa_private_key.h" | |
| 10 | |
| 11 namespace crypto { | |
| 12 | |
| 13 // static | |
| 14 SignatureCreator* SignatureCreator::Create(RSAPrivateKey* key) { | |
| 15 scoped_ptr<SignatureCreator> result(new SignatureCreator); | |
| 16 result->key_ = key; | |
| 17 | |
| 18 if (!CryptCreateHash(key->provider(), CALG_SHA1, 0, 0, | |
| 19 result->hash_object_.receive())) { | |
| 20 NOTREACHED(); | |
| 21 return NULL; | |
| 22 } | |
| 23 | |
| 24 return result.release(); | |
| 25 } | |
| 26 | |
| 27 SignatureCreator::SignatureCreator() : key_(NULL), hash_object_(0) {} | |
| 28 | |
| 29 SignatureCreator::~SignatureCreator() {} | |
| 30 | |
| 31 bool SignatureCreator::Update(const uint8* data_part, int data_part_len) { | |
| 32 if (!CryptHashData(hash_object_, data_part, data_part_len, 0)) { | |
| 33 NOTREACHED(); | |
| 34 return false; | |
| 35 } | |
| 36 | |
| 37 return true; | |
| 38 } | |
| 39 | |
| 40 bool SignatureCreator::Final(std::vector<uint8>* signature) { | |
| 41 DWORD signature_length = 0; | |
| 42 if (!CryptSignHash(hash_object_, AT_SIGNATURE, NULL, 0, NULL, | |
| 43 &signature_length)) { | |
| 44 return false; | |
| 45 } | |
| 46 | |
| 47 std::vector<uint8> temp; | |
| 48 temp.resize(signature_length); | |
| 49 if (!CryptSignHash(hash_object_, AT_SIGNATURE, NULL, 0, &temp.front(), | |
| 50 &signature_length)) { | |
| 51 return false; | |
| 52 } | |
| 53 | |
| 54 temp.resize(signature_length); | |
| 55 for (size_t i = temp.size(); i > 0; --i) | |
| 56 signature->push_back(temp[i - 1]); | |
| 57 | |
| 58 return true; | |
| 59 } | |
| 60 | |
| 61 } // namespace crypto | |
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