1 // MD5.CC - source code for the C++/object oriented translation and 2 // modification of MD5. 3 4 // Translation and modification (c) 1995 by Mordechai T. Abzug 5 6 // This translation/ modification is provided "as is," without express or 7 // implied warranty of any kind. 8 9 // The translator/ modifier does not claim (1) that MD5 will do what you think 10 // it does; (2) that this translation/ modification is accurate; or (3) that 11 // this software is "merchantible." (Language for this disclaimer partially 12 // copied from the disclaimer below). 13 14 /* based on: 15 16 MD5.H - header file for MD5C.C 17 MDDRIVER.C - test driver for MD2, MD4 and MD5 18 19 Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All 20 rights reserved. 21 22 License to copy and use this software is granted provided that it 23 is identified as the "RSA Data Security, Inc. MD5 Message-Digest 24 Algorithm" in all material mentioning or referencing this software 25 or this function. 26 27 License is also granted to make and use derivative works provided 28 that such works are identified as "derived from the RSA Data 29 Security, Inc. MD5 Message-Digest Algorithm" in all material 30 mentioning or referencing the derived work. 31 32 RSA Data Security, Inc. makes no representations concerning either 33 the merchantability of this software or the suitability of this 34 software for any particular purpose. It is provided "as is" 35 without express or implied warranty of any kind. 36 37 These notices must be retained in any copies of any part of this 38 documentation and/or software. 39 40 */ 41 42 #include <stdio.h> 43 #include <fstream> 44 #include <iostream> 45 46 class MD5 { 47 48 public: 49 // methods for controlled operation: 50 MD5 (); // simple initializer 51 void update (const unsigned char *input, unsigned int input_length); 52 void update (std::istream& stream); 53 void update (FILE *file); 54 void update (std::ifstream& stream); 55 void finalize (); 56 57 // constructors for special circumstances. All these constructors finalize 58 // the MD5 context. 59 MD5 (unsigned char *string); // digest string, finalize 60 MD5 (std::istream& stream); // digest stream, finalize 61 MD5 (FILE *file); // digest file, close, finalize 62 MD5 (std::ifstream& stream); // digest stream, close, finalize 63 64 // methods to acquire finalized result 65 unsigned char *raw_digest (); // digest as a 16-byte binary array 66 char * hex_digest (); // digest as a 33-byte ascii-hex string 67 friend std::ostream& operator<< (std::ostream&, MD5 context); 68 69 70 71 private: 72 73 // first, some types: 74 typedef unsigned int uint4; // assumes integer is 4 words long 75 typedef unsigned short int uint2; // assumes short integer is 2 words long 76 typedef unsigned char uint1; // assumes char is 1 word long 77 78 // next, the private data: 79 uint4 state[4]; 80 uint4 count[2]; // number of *bits*, mod 2^64 81 uint1 buffer[64]; // input buffer 82 uint1 digest[16]; 83 uint1 finalized; 84 85 // last, the private methods, mostly static: 86 void init (); // called by all constructors 87 void transform (const uint1 *buffer); // does the real update work. Note 88 // that length is implied to be 64. 89 90 static void encode (uint1 *dest, uint4 *src, uint4 length); 91 static void decode (uint4 *dest, const uint1 *src, uint4 length); 92 static void memcpy (uint1 *dest, const uint1 *src, uint4 length); 93 static void memset (uint1 *start, uint1 val, uint4 length); 94 95 static inline uint4 rotate_left (uint4 x, uint4 n); 96 static inline uint4 F (uint4 x, uint4 y, uint4 z); 97 static inline uint4 G (uint4 x, uint4 y, uint4 z); 98 static inline uint4 H (uint4 x, uint4 y, uint4 z); 99 static inline uint4 I (uint4 x, uint4 y, uint4 z); 100 static inline void FF (uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, 101 uint4 s, uint4 ac); 102 static inline void GG (uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, 103 uint4 s, uint4 ac); 104 static inline void HH (uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, 105 uint4 s, uint4 ac); 106 static inline void II (uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, 107 uint4 s, uint4 ac); 108 109 }; 110