src/FileHash.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // LameXP - Audio Encoder Front-End
   3 // Copyright (C) 2004-2019 LoRd_MuldeR <MuldeR2@GMX.de>
   4 //
   5 // This program is free software; you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation; either version 2 of the License, or
   8 // (at your option) any later version, but always including the *additional*
   9 // restrictions defined in the "License.txt" file.
  10 //
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License along
  17 // with this program; if not, write to the Free Software Foundation, Inc.,
  18 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 //
  20 // http://www.gnu.org/licenses/gpl-2.0.txt
  21 ///////////////////////////////////////////////////////////////////////////////
  22
  23 #include "FileHash.h"
  24
  25 //MUtils
  26 #include <MUtils/Hash.h>
  27 #include <MUtils/Exception.h>
  28
  29 static const char *g_blnk = "deadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef";
  30 static const char *g_seed = "c375d83b4388329408dfcbb4d9a065b6e06d28272f25ef299c70b506e26600af79fd2f866ae24602daf38f25c9d4b7e1";
  31 static const char *g_salt = "ee9f7bdabc170763d2200a7e3030045aafe380011aefc1730e547e9244c62308aac42a976feeca224ba553de0c4bb883";
  32
  33 QByteArray FileHash::computeHash(QFile &file)
  34 {
  35         QByteArray result;
  36
  37         if(file.isOpen() && file.reset())
  38         {
  39                 QScopedPointer<MUtils::Hash::Hash> hash(MUtils::Hash::create(MUtils::Hash::HASH_KECCAK_384));
  40                 const QByteArray data = file.readAll();
  41                 if (data.size() >= 16)
  42                 {
  43                         const QByteArray seed = QByteArray::fromHex(g_seed);
  44                         const QByteArray salt = QByteArray::fromHex(g_salt);
  45
  46                         bool okay[3];
  47                         okay[0] = hash->update(seed);
  48                         okay[1] = hash->update(data);
  49                         okay[2] = hash->update(salt);
  50
  51                         if (okay[0] && okay[1] && okay[2])
  52                         {
  53                                 result = hash->digest(true);
  54                         }
  55                 }
  56         }
  57
  58         return result.isEmpty() ? QByteArray::fromHex(g_blnk).toHex() : result;
  59 }