src/base/bittorrent/infohash.h

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2015, 2021  Vladimir Golovnev <glassez@yandex.ru>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18  *
  19  * In addition, as a special exception, the copyright holders give permission to
  20  * link this program with the OpenSSL project's "OpenSSL" library (or with
  21  * modified versions of it that use the same license as the "OpenSSL" library),
  22  * and distribute the linked executables. You must obey the GNU General Public
  23  * License in all respects for all of the code used other than "OpenSSL".  If you
  24  * modify file(s), you may extend this exception to your version of the file(s),
  25  * but you are not obligated to do so. If you do not wish to do so, delete this
  26  * exception statement from your version.
  27  */
  28
  29 #pragma once
  30
  31 #ifdef QBT_USES_LIBTORRENT2
  32 #include <libtorrent/info_hash.hpp>
  33 #endif
  34
  35 #include <QHash>
  36 #include <QMetaType>
  37
  38 #include "base/digest32.h"
  39
  40 using SHA1Hash = Digest32<160>;
  41 using SHA256Hash = Digest32<256>;
  42
  43 namespace BitTorrent
  44 {
  45     class InfoHash;
  46
  47     class TorrentID : public Digest32<160>
  48     {
  49     public:
  50         using BaseType = Digest32<160>;
  51         using BaseType::BaseType;
  52
  53         static TorrentID fromString(const QString &hashString);
  54         static TorrentID fromInfoHash(const InfoHash &infoHash);
  55     };
  56
  57     class InfoHash
  58     {
  59     public:
  60 #ifdef QBT_USES_LIBTORRENT2
  61         using WrappedType = lt::info_hash_t;
  62 #else
  63         using WrappedType = lt::sha1_hash;
  64 #endif
  65
  66         InfoHash() = default;
  67         InfoHash(const InfoHash &other) = default;
  68         InfoHash(const WrappedType &nativeHash);
  69
  70         bool isValid() const;
  71         SHA1Hash v1() const;
  72         SHA256Hash v2() const;
  73         TorrentID toTorrentID() const;
  74
  75         operator WrappedType() const;
  76
  77     private:
  78         bool m_valid = false;
  79         WrappedType m_nativeHash;
  80     };
  81
  82     uint qHash(const TorrentID &key, uint seed);
  83
  84     bool operator==(const InfoHash &left, const InfoHash &right);
  85     bool operator!=(const InfoHash &left, const InfoHash &right);
  86 }
  87
  88 Q_DECLARE_METATYPE(BitTorrent::TorrentID)