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 #include "base/crypto/signature_creator.h" 6 7 #include <cryptohi.h> 8 #include <keyhi.h> 9 #include <stdlib.h> 10 11 #include "base/logging.h" 12 #include "base/nss_util.h" 13 #include "base/scoped_ptr.h" 14 15 namespace base { 16 17 // static 18 SignatureCreator* SignatureCreator::Create(RSAPrivateKey* key) { 19 scoped_ptr<SignatureCreator> result(new SignatureCreator); 20 result->key_ = key; 21 22 result->sign_context_ = SGN_NewContext(SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION, 23 key->key()); 24 if (!result->sign_context_) { 25 NOTREACHED(); 26 return NULL; 27 } 28 29 SECStatus rv = SGN_Begin(result->sign_context_); 30 if (rv != SECSuccess) { 31 NOTREACHED(); 32 return NULL; 33 } 34 35 return result.release(); 36 } 37 38 SignatureCreator::SignatureCreator() : sign_context_(NULL) { 39 EnsureNSSInit(); 40 } 41 42 SignatureCreator::~SignatureCreator() { 43 if (sign_context_) { 44 SGN_DestroyContext(sign_context_, PR_TRUE); 45 sign_context_ = NULL; 46 } 47 } 48 49 bool SignatureCreator::Update(const uint8* data_part, int data_part_len) { 50 // TODO(wtc): Remove this const_cast when we require NSS 3.12.5. 51 // See NSS bug https://bugzilla.mozilla.org/show_bug.cgi?id=518255 52 SECStatus rv = SGN_Update(sign_context_, 53 const_cast<unsigned char*>(data_part), 54 data_part_len); 55 if (rv != SECSuccess) { 56 NOTREACHED(); 57 return false; 58 } 59 60 return true; 61 } 62 63 bool SignatureCreator::Final(std::vector<uint8>* signature) { 64 SECItem signature_item; 65 SECStatus rv = SGN_End(sign_context_, &signature_item); 66 if (rv != SECSuccess) { 67 NOTREACHED(); 68 return false; 69 } 70 signature->assign(signature_item.data, 71 signature_item.data + signature_item.len); 72 SECITEM_FreeItem(&signature_item, PR_FALSE); 73 return true; 74 } 75 76 } // namespace base 77
