calc_file_hashes_task.cpp

/*
Copyright 2014 VirusTotal S.L. All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

#include <QDebug>
#include <QThread>
#include <QByteArray>
#include <QCryptographicHash>

#include "calc_file_hashes_task.h"

CalcFileHashesTask::CalcFileHashesTask(QVtFile *vt_file)
{
  file = vt_file;
}


void CalcFileHashesTask::run()
{
  QByteArray buffer;
  const int buff_size = 65536;
  QCryptographicHash md5_hash(QCryptographicHash::Md5);
  QCryptographicHash sha1_hash(QCryptographicHash::Sha1);
  QCryptographicHash sha256_hash(QCryptographicHash::Sha256);
  qDebug() << "CalcFileHashesTask::run thread " << QThread::currentThread();

  buffer.resize(buff_size);

  if  (!file) {
    return;
  }

  if(!file->open(QIODevice::ReadOnly)) {
      // error opening
     qDebug() << "CalcFileHashesTask Error opening file " << file->error();
    file->SetState(kErrorAccess);
    return;
  }


  QCryptographicHash cryptoHash(QCryptographicHash::Md5);
  while(!file->atEnd()){
    buffer = file->read(buff_size);
    md5_hash.addData(buffer);
    sha1_hash.addData(buffer);
    sha256_hash.addData(buffer);
  }

  file->SetMd5(md5_hash.result());
  file->SetSha1(sha1_hash.result());
  file->SetSha256(sha256_hash.result());

  file->close();
  file->SetState(kHashesCalculated); // mark done
}