src/FileHash.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // LameXP - Audio Encoder Front-End
   3 // Copyright (C) 2004-2016 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_Keccak.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 hash = QByteArray::fromHex(g_blnk).toHex();
  36
  37         if(file.isOpen() && file.reset())
  38         {
  39                 MUtils::Hash::Keccak keccak;
  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                         if (keccak.init(MUtils::Hash::Keccak::hb384))
  46                         {
  47                                 bool ok = true;
  48                                 ok = ok && keccak.addData(seed);
  49                                 ok = ok && keccak.addData(data);
  50                                 ok = ok && keccak.addData(salt);
  51                                 if (ok)
  52                                 {
  53                                         const QByteArray digest = keccak.finalize();
  54                                         if (!digest.isEmpty()) hash = digest.toHex();
  55                                 }
  56                         }
  57                 }
  58         }
  59
  60         return hash;
  61 }
  62
  63 void FileHash::selfTest(void)
  64 {
  65         if(!MUtils::Hash::Keccak::selfTest())
  66         {
  67                 MUTILS_THROW("QKeccakHash self-test has failed!");
  68         }
  69 }