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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 <stdlib.h> | |
| 8 | |
| 9 #include "base/logging.h" | |
| 10 #include "base/memory/scoped_ptr.h" | |
| 11 #include "crypto/cssm_init.h" | |
| 12 #include "crypto/rsa_private_key.h" | |
| 13 | |
| 14 namespace crypto { | |
| 15 | |
| 16 // static | |
| 17 SignatureCreator* SignatureCreator::Create(RSAPrivateKey* key) { | |
| 18 scoped_ptr<SignatureCreator> result(new SignatureCreator); | |
| 19 result->key_ = key; | |
| 20 | |
| 21 CSSM_RETURN crtn; | |
| 22 crtn = CSSM_CSP_CreateSignatureContext(GetSharedCSPHandle(), | |
| 23 CSSM_ALGID_SHA1WithRSA, | |
| 24 NULL, | |
| 25 key->key(), | |
| 26 &result->sig_handle_); | |
| 27 if (crtn) { | |
| 28 NOTREACHED(); | |
| 29 return NULL; | |
| 30 } | |
| 31 | |
| 32 crtn = CSSM_SignDataInit(result->sig_handle_); | |
| 33 if (crtn) { | |
| 34 NOTREACHED(); | |
| 35 return NULL; | |
| 36 } | |
| 37 | |
| 38 return result.release(); | |
| 39 } | |
| 40 | |
| 41 SignatureCreator::SignatureCreator() : key_(NULL), sig_handle_(0) { | |
| 42 EnsureCSSMInit(); | |
| 43 } | |
| 44 | |
| 45 SignatureCreator::~SignatureCreator() { | |
| 46 CSSM_RETURN crtn; | |
| 47 if (sig_handle_) { | |
| 48 crtn = CSSM_DeleteContext(sig_handle_); | |
| 49 DCHECK_EQ(CSSM_OK, crtn); | |
| 50 } | |
| 51 } | |
| 52 | |
| 53 bool SignatureCreator::Update(const uint8* data_part, int data_part_len) { | |
| 54 CSSM_DATA data; | |
| 55 data.Data = const_cast<uint8*>(data_part); | |
| 56 data.Length = data_part_len; | |
| 57 CSSM_RETURN crtn = CSSM_SignDataUpdate(sig_handle_, &data, 1); | |
| 58 DCHECK_EQ(CSSM_OK, crtn); | |
| 59 return true; | |
| 60 } | |
| 61 | |
| 62 bool SignatureCreator::Final(std::vector<uint8>* signature) { | |
| 63 ScopedCSSMData sig; | |
| 64 CSSM_RETURN crtn = CSSM_SignDataFinal(sig_handle_, sig); | |
| 65 | |
| 66 if (crtn) { | |
| 67 NOTREACHED(); | |
| 68 return false; | |
| 69 } | |
| 70 | |
| 71 signature->assign(sig->Data, sig->Data + sig->Length); | |
| 72 return true; | |
| 73 } | |
| 74 | |
| 75 } // namespace crypto | |
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