MD5.h

// MD5.h -- C++ wrapper arount the MD5 C interface.

// Translation and modification (c) 1995 by Mordechai T. Abzug

// This translation/ modification is provided "as is," without express or
// implied warranty of any kind.

// The translator/ modifier does not claim (1) that MD5 will do what you think
// it does; (2) that this translation/ modification is accurate; or (3) that
// this software is "merchantible."  (Language for this disclaimer partially
// copied from the disclaimer below).

/*
   Based on:

   MD5.H - header file for MD5C.C
   MDDRIVER.C - test driver for MD2, MD4 and MD5

   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.
*/

#ifndef _CSP_EXAMPLES_MD5_H
#define _CSP_EXAMPLES_MD5_H


#include <cstdio>
#include <fstream>
#include <iostream>


class MD5
{
  public:
    MD5();

    bool update(unsigned char* input, unsigned int input_length);

    bool update(std::istream& stream);

    bool update(FILE* file);

    bool update(std::ifstream& stream);

    bool finalize();


    MD5(unsigned char* asciiz);

    MD5(std::istream& stream);

    MD5(std::ifstream& stream);

    MD5(FILE* file);


    unsigned char* rawDigest();

    char* hexDigest();

    friend std::ostream& operator<<(std::ostream&, MD5 context);

  private:
    typedef unsigned int uint4;
    typedef unsigned short int uint2;

    typedef unsigned char uint1;

    uint4 state[4];

    uint4 count[2];

    uint1 buffer[64];
    uint1 digest[16];
    uint1 finalized;

    void init();

    void transform(uint1* buffer);

    static void encode(uint1* dest, uint4* src, uint4 length);
    static void decode(uint4* dest, uint1* src, uint4 length);
    static void memcpy(uint1* dest, uint1* src, uint4 length);
    static void memset(uint1* start, uint1 val, uint4 length);

    static inline uint4 rotate_left(uint4 x, uint4 n);
    static inline uint4 F(uint4 x, uint4 y, uint4 z);
    static inline uint4 G(uint4 x, uint4 y, uint4 z);
    static inline uint4 H(uint4 x, uint4 y, uint4 z);
    static inline uint4 I(uint4 x, uint4 y, uint4 z);
    static inline void FF(
        uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac);
    static inline void GG(
        uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac);
    static inline void HH(
        uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac);
    static inline void II(
        uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac);
};


#endif // _CSP_EXAMPLES_MD5_H

// Local Variables:
// mode: C++
// End:

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