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 <openssl/evp.h> 8 9 #include "base/logging.h" 10 #include "base/memory/scoped_ptr.h" 11 #include "base/stl_util-inl.h" 12 #include "crypto/openssl_util.h" 13 14 namespace crypto { 15 16 // static Create(RSAPrivateKey * key)17SignatureCreator* SignatureCreator::Create(RSAPrivateKey* key) { 18 OpenSSLErrStackTracer err_tracer(FROM_HERE); 19 scoped_ptr<SignatureCreator> result(new SignatureCreator); 20 result->key_ = key; 21 if (!EVP_SignInit_ex(result->sign_context_, EVP_sha1(), NULL)) 22 return NULL; 23 return result.release(); 24 } 25 SignatureCreator()26SignatureCreator::SignatureCreator() 27 : sign_context_(EVP_MD_CTX_create()) { 28 } 29 ~SignatureCreator()30SignatureCreator::~SignatureCreator() { 31 EVP_MD_CTX_destroy(sign_context_); 32 } 33 Update(const uint8 * data_part,int data_part_len)34bool SignatureCreator::Update(const uint8* data_part, int data_part_len) { 35 OpenSSLErrStackTracer err_tracer(FROM_HERE); 36 return EVP_SignUpdate(sign_context_, data_part, data_part_len) == 1; 37 } 38 Final(std::vector<uint8> * signature)39bool SignatureCreator::Final(std::vector<uint8>* signature) { 40 OpenSSLErrStackTracer err_tracer(FROM_HERE); 41 EVP_PKEY* key = key_->key(); 42 signature->resize(EVP_PKEY_size(key)); 43 44 unsigned int len = 0; 45 int rv = EVP_SignFinal(sign_context_, vector_as_array(signature), &len, key); 46 if (!rv) { 47 signature->clear(); 48 return false; 49 } 50 signature->resize(len); 51 return true; 52 } 53 54 } // namespace crypto 55