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MD5.h
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MD5.h
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/*
* Copyright (C) 2012 Me and My Shadow
*
* This file is part of Me and My Shadow.
*
* Me and My Shadow 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 3 of the License, or
* (at your option) any later version.
*
* Me and My Shadow 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 Me and My Shadow. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MD5_H
#define MD5_H
#define MD5_CTX_SIZE 128
class Md5{
public:
//compute the MD5 message digest of the n bytes at d and place it in md
//(which must have space for 16 bytes of output). If md is NULL,
//the digest is placed in a static array.
static unsigned char *calc(const void *d, unsigned long n, unsigned char *md);
//convert a 16-byte digest to string representation.
//the return value is in a static array.
static char *toString(const unsigned char *md);
//convert a string representation of MD5 to a 16-byte digest.
//return value: if the conversion is successful.
static bool fromString(const char* s, unsigned char *md);
//Following are lower-level functions.
//initializes the class for calculating MD5.
void init();
//add chunks of the message to be hashed (len bytes at data).
void update(const void *data, unsigned long len);
//finished the caluclation, places the message digest in md,
//which must have space for 16 bytes of output (or NULL).
unsigned char *final(unsigned char *md);
private:
//byte array, should be large enough to holding MD5_CTX.
char md5_ctx[MD5_CTX_SIZE];
};
#endif

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