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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 <array>
#include <cstdlib>
#include "util.h"
#include "message.h"
#include "PieceStorage.h"
#include "MessageDigest.h"
#include "DiskAdaptor.h"
#include "FileEntry.h"
#include "BitfieldMan.h"
#include "DownloadContext.h"
#include "LogFactory.h"
#include "fmt.h"
namespace aria2 {
IteratableChecksumValidator::IteratableChecksumValidator
(const std::shared_ptr<DownloadContext>& dctx,
const std::shared_ptr<PieceStorage>& pieceStorage)
: dctx_(dctx),
pieceStorage_(pieceStorage),
currentOffset_(0)
{}
IteratableChecksumValidator::~IteratableChecksumValidator() {}
void IteratableChecksumValidator::validateChunk()
{
// Don't guard with !finished() to allow zero-length file to be
// verified.
std::array<unsigned char, 4_k> buf;
size_t length = pieceStorage_->getDiskAdaptor()->readDataDropCache
(buf.data(), buf.size(), currentOffset_);
ctx_->update(buf.data(), length);
currentOffset_ += length;
if(finished()) {
std::string actualDigest = ctx_->digest();
if(dctx_->getDigest() == actualDigest) {
pieceStorage_->markAllPiecesDone();
dctx_->setChecksumVerified(true);
} else {
A2_LOG_INFO(fmt("Checksum validation failed. expected=%s, actual=%s",
util::toHex(dctx_->getDigest()).c_str(),
util::toHex(actualDigest).c_str()));
BitfieldMan bitfield(dctx_->getPieceLength(), dctx_->getTotalLength());
pieceStorage_->setBitfield(bitfield.getBitfield(), bitfield.getBitfieldLength());
}
}
}
bool IteratableChecksumValidator::finished() const
{
if(currentOffset_ >= dctx_->getTotalLength()) {
return true;
} else {
return false;
}
}
int64_t IteratableChecksumValidator::getTotalLength() const
{
return dctx_->getTotalLength();
}
void IteratableChecksumValidator::init()
{
currentOffset_ = 0;
ctx_ = MessageDigest::create(dctx_->getHashType());
}
} // namespace aria2
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