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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2006 Tatsuhiro Tsujikawa
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#include "IteratableChecksumValidator.h"
#include "Util.h"
#include "message.h"
#define BUFSIZE 16*1024
void IteratableChecksumValidator::validateChunk()
{
if(!finished()) {
char data[BUFSIZE];
int32_t size = _diskWriter->readData(data, sizeof(data), _currentOffset);
_ctx->digestUpdate(data, size);
_currentOffset += sizeof(data);
if(finished()) {
unsigned char* digest = new unsigned char[_ctx->digestLength()];
try {
_ctx->digestFinal(digest);
if(_checksum->getMessageDigest() != Util::toHex(digest, _ctx->digestLength())) {
_bitfield->clearAllBit();
}
delete [] digest;
} catch(...) {
delete [] digest;
throw;
}
}
}
}
bool IteratableChecksumValidator::canValidate() const
{
// We assume file is already opened using DiskWriter::open or openExistingFile.
return !_checksum.isNull() && !_checksum->isEmpty();
}
void IteratableChecksumValidator::init()
{
_bitfield->setAllBit();
_currentOffset = 0;
_ctx = new MessageDigestContext();
_ctx->trySetAlgo(_checksum->getAlgo());
_ctx->digestInit();
}
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