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/*
Copyright (C) 2004-2007 Christian Wieninger
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
The author can be reached at cwieninger@gmx.de
The project's page is at http://winni.vdr-developer.org/epgsearch
*/
/////////////////////////////////////////////////////////////////////////
// MD5.cpp
// Implementation file for MD5 class
//
// This C++ Class implementation of the original RSA Data Security, Inc.
// MD5 Message-Digest Algorithm is copyright (c) 2002, Gary McNickle.
// All rights reserved. This software is a derivative of the "RSA Data
// Security, Inc. MD5 Message-Digest Algorithm"
//
// You may use this software free of any charge, but without any
// warranty or implied warranty, provided that you follow the terms
// of the original RSA copyright, listed below.
//
// Original RSA Data Security, Inc. Copyright notice
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
// rights reserved.
//
// License to copy and use this software is granted provided that it
// is identified as the "RSA Data Security, Inc. MD5 Message-Digest
// Algorithm" in all material mentioning or referencing this software
// or this function.
// License is also granted to make and use derivative works provided
// that such works are identified as "derived from the RSA Data
// Security, Inc. MD5 Message-Digest Algorithm" in all material
// mentioning or referencing the derived work.
// RSA Data Security, Inc. makes no representations concerning either
// the merchantability of this software or the suitability of this
// software for any particular purpose. It is provided "as is"
// without express or implied warranty of any kind.
// These notices must be retained in any copies of any part of this
// documentation and/or software.
/////////////////////////////////////////////////////////////////////////
typedef unsigned int uint4;
typedef unsigned short int uint2;
typedef unsigned char uchar;
char* PrintMD5(uchar md5Digest[16]);
char* MD5String(char* szString);
class md5
{
// Methods
public:
md5() { Init(); }
void Init();
void Update(uchar* chInput, uint4 nInputLen);
void Finalize();
uchar* Digest() { return m_Digest; }
private:
void Transform(uchar* block);
void Encode(uchar* dest, uint4* src, uint4 nLength);
void Decode(uint4* dest, uchar* src, uint4 nLength);
inline uint4 rotate_left(uint4 x, uint4 n)
{ return ((x << n) | (x >> (32-n))); }
inline uint4 F(uint4 x, uint4 y, uint4 z)
{ return ((x & y) | (~x & z)); }
inline uint4 G(uint4 x, uint4 y, uint4 z)
{ return ((x & z) | (y & ~z)); }
inline uint4 H(uint4 x, uint4 y, uint4 z)
{ return (x ^ y ^ z); }
inline uint4 I(uint4 x, uint4 y, uint4 z)
{ return (y ^ (x | ~z)); }
inline void FF(uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac)
{ a += F(b, c, d) + x + ac; a = rotate_left(a, s); a += b; }
inline void GG(uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac)
{ a += G(b, c, d) + x + ac; a = rotate_left(a, s); a += b; }
inline void HH(uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac)
{ a += H(b, c, d) + x + ac; a = rotate_left(a, s); a += b; }
inline void II(uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac)
{ a += I(b, c, d) + x + ac; a = rotate_left(a, s); a += b; }
// Data
private:
uint4 m_State[4];
uint4 m_Count[2];
uchar m_Buffer[64];
uchar m_Digest[16];
uchar m_Finalized;
};
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