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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "crypto/signature_creator.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "crypto/rsa_private_key.h"
namespace crypto {
// static
SignatureCreator* SignatureCreator::Create(RSAPrivateKey* key) {
scoped_ptr<SignatureCreator> result(new SignatureCreator);
result->key_ = key;
if (!CryptCreateHash(key->provider(), CALG_SHA1, 0, 0,
result->hash_object_.receive())) {
NOTREACHED();
return NULL;
}
return result.release();
}
SignatureCreator::SignatureCreator() : key_(NULL), hash_object_(0) {}
SignatureCreator::~SignatureCreator() {}
bool SignatureCreator::Update(const uint8* data_part, int data_part_len) {
if (!CryptHashData(hash_object_, data_part, data_part_len, 0)) {
NOTREACHED();
return false;
}
return true;
}
bool SignatureCreator::Final(std::vector<uint8>* signature) {
DWORD signature_length = 0;
if (!CryptSignHash(hash_object_, AT_SIGNATURE, NULL, 0, NULL,
&signature_length)) {
return false;
}
std::vector<uint8> temp;
temp.resize(signature_length);
if (!CryptSignHash(hash_object_, AT_SIGNATURE, NULL, 0, &temp.front(),
&signature_length)) {
return false;
}
temp.resize(signature_length);
for (size_t i = temp.size(); i > 0; --i)
signature->push_back(temp[i - 1]);
return true;
}
} // namespace crypto
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