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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 "IteratableChunkChecksumValidator.h"
#include "Util.h"
#include "message.h"
void IteratableChunkChecksumValidator::validateChunk()
{
if(!finished()) {
string actualChecksum = calculateActualChecksum();
if(!_chunkChecksum->validateChunk(actualChecksum, _currentIndex)) {
int64_t offset = ((int64_t)_currentIndex)*_chunkChecksum->getChecksumLength();
// wrong checksum
logger->info(EX_INVALID_CHUNK_CHECKSUM,
_currentIndex,
offset,
_chunkChecksum->getChecksum(_currentIndex).c_str(),
actualChecksum.c_str());
int32_t startIndex;
int32_t endIndex;
Util::indexRange(startIndex, endIndex, offset,
_chunkChecksum->getChecksumLength(),
_bitfield->getBlockLength());
_bitfield->unsetBitRange(startIndex, endIndex);
}
_currentIndex++;
}
}
string IteratableChunkChecksumValidator::calculateActualChecksum()
{
int64_t offset = ((int64_t)_currentIndex)*_chunkChecksum->getChecksumLength();
int32_t length = _diskWriter->size() < offset+_chunkChecksum->getChecksumLength() ? _diskWriter->size()-offset : _chunkChecksum->getChecksumLength();
return _diskWriter->messageDigest(offset, length, _chunkChecksum->getAlgo());
}
bool IteratableChunkChecksumValidator::canValidate() const
{
// We assume file is already opened using DiskWriter::open or openExistingFile.
return _chunkChecksum->getEstimatedDataLength() >= _diskWriter->size();
}
void IteratableChunkChecksumValidator::init()
{
_bitfield->setAllBit();
_currentIndex = 0;
}
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