112 lines
4.1 KiB
C++
112 lines
4.1 KiB
C++
// MD5.CC - source code for the C++/object oriented translation and
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// modification of MD5.
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// Translation and modification (c) 1995 by Mordechai T. Abzug
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// This translation/ modification is provided "as is," without express or
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// implied warranty of any kind.
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// The translator/ modifier does not claim (1) that MD5 will do what you think
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// it does; (2) that this translation/ modification is accurate; or (3) that
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// this software is "merchantible." (Language for this disclaimer partially
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// copied from the disclaimer below).
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/* based on:
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MD5.H - header file for MD5C.C
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MDDRIVER.C - test driver for MD2, MD4 and MD5
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Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
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rights reserved.
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License to copy and use this software is granted provided that it
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is identified as the "RSA Data Security, Inc. MD5 Message-Digest
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Algorithm" in all material mentioning or referencing this software
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or this function.
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License is also granted to make and use derivative works provided
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that such works are identified as "derived from the RSA Data
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Security, Inc. MD5 Message-Digest Algorithm" in all material
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mentioning or referencing the derived work.
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RSA Data Security, Inc. makes no representations concerning either
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the merchantability of this software or the suitability of this
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software for any particular purpose. It is provided "as is"
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without express or implied warranty of any kind.
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These notices must be retained in any copies of any part of this
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documentation and/or software.
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*/
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#include <stdio.h>
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#include <fstream>
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#include <iostream>
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using namespace std;
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class MD5 {
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public:
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// methods for controlled operation:
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MD5 (); // simple initializer
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void update (const unsigned char *input, unsigned int input_length);
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void update (istream& stream);
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void update (FILE *file);
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void update (ifstream& stream);
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void finalize ();
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// constructors for special circumstances. All these constructors finalize
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// the MD5 context.
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MD5 (unsigned char *string); // digest string, finalize
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MD5 (istream& stream); // digest stream, finalize
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MD5 (FILE *file); // digest file, close, finalize
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MD5 (ifstream& stream); // digest stream, close, finalize
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// methods to acquire finalized result
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unsigned char *raw_digest (); // digest as a 16-byte binary array
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char * hex_digest (); // digest as a 33-byte ascii-hex string
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friend ostream& operator<< (ostream&, MD5 context);
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private:
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// first, some types:
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typedef unsigned int uint4; // assumes integer is 4 words long
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typedef unsigned short int uint2; // assumes short integer is 2 words long
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typedef unsigned char uint1; // assumes char is 1 word long
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// next, the private data:
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uint4 state[4];
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uint4 count[2]; // number of *bits*, mod 2^64
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uint1 buffer[64]; // input buffer
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uint1 digest[16];
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uint1 finalized;
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// last, the private methods, mostly static:
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void init (); // called by all constructors
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void transform (uint1 *buffer); // does the real update work. Note
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// that length is implied to be 64.
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static void encode (uint1 *dest, uint4 *src, uint4 length);
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static void decode (uint4 *dest, uint1 *src, uint4 length);
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//static void memcpy (uint1 *dest, uint1 *src, uint4 length);
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//static void memset (uint1 *start, uint1 val, uint4 length);
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static inline uint4 rotate_left (uint4 x, uint4 n);
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static inline uint4 F (uint4 x, uint4 y, uint4 z);
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static inline uint4 G (uint4 x, uint4 y, uint4 z);
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static inline uint4 H (uint4 x, uint4 y, uint4 z);
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static inline uint4 I (uint4 x, uint4 y, uint4 z);
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static inline void FF (uint4& a, uint4 b, uint4 c, uint4 d, uint4 x,
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uint4 s, uint4 ac);
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static inline void GG (uint4& a, uint4 b, uint4 c, uint4 d, uint4 x,
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uint4 s, uint4 ac);
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static inline void HH (uint4& a, uint4 b, uint4 c, uint4 d, uint4 x,
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uint4 s, uint4 ac);
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static inline void II (uint4& a, uint4 b, uint4 c, uint4 d, uint4 x,
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uint4 s, uint4 ac);
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};
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