00001 /* vim: set sw=4 sts=4 et foldmethod=syntax : */ 00002 00003 /* 00004 * Copyright (c) 2006, 2007 Ciaran McCreesh 00005 * 00006 * This file is part of the Paludis package manager. Paludis is free software; 00007 * you can redistribute it and/or modify it under the terms of the GNU General 00008 * Public License version 2, as published by the Free Software Foundation. 00009 * 00010 * Paludis is distributed in the hope that it will be useful, but WITHOUT ANY 00011 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 00012 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more 00013 * details. 00014 * 00015 * You should have received a copy of the GNU General Public License along with 00016 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple 00017 * Place, Suite 330, Boston, MA 02111-1307 USA 00018 */ 00019 00020 #ifndef PALUDIS_GUARD_PALUDIS_UTIL_SHA256_HH 00021 #define PALUDIS_GUARD_PALUDIS_UTIL_SHA256_HH 1 00022 00023 #include <iosfwd> 00024 #include <string> 00025 #include <paludis/util/attributes.hh> 00026 #include <inttypes.h> 00027 00028 /** \file 00029 * Declarations for the SHA256 digest class. 00030 * 00031 * \ingroup g_digests 00032 * 00033 * \section Examples 00034 * 00035 * - None at this time. 00036 */ 00037 00038 namespace paludis 00039 { 00040 /** 00041 * SHA256 digest class. 00042 * 00043 * \ingroup g_digests 00044 */ 00045 class PALUDIS_VISIBLE SHA256 00046 { 00047 private: 00048 static const PALUDIS_HIDDEN uint32_t _k[64]; 00049 00050 uint32_t _h[8]; 00051 uint64_t _size; 00052 bool _done_one_pad; 00053 00054 void PALUDIS_HIDDEN _update(const uint8_t * const block); 00055 00056 inline int PALUDIS_HIDDEN _get(std::istream & stream); 00057 00058 public: 00059 /** 00060 * Constructor. 00061 */ 00062 SHA256(std::istream & stream); 00063 00064 /** 00065 * Our checksum, as a string of hex characters. 00066 */ 00067 std::string hexsum() const; 00068 }; 00069 } 00070 00071 #endif