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 <iostream> 44 #include <fstream> 45 46 using namespace std; 47 48 class MD5 { 49 50 public: 51 // methods for controlled operation: 52 MD5 (); // simple initializer 53 54 void update (unsigned char *input, unsigned int input_length); 55 void update (istream& stream); 56 void update (FILE *file); 57 void update (ifstream& stream); 58 void finalize (); 59 60 // constructors for special circumstances. All these constructors finalize 61 // the MD5 context. 62 MD5 (unsigned char *string); // digest string, finalize 63 MD5 (istream& stream); // digest stream, finalize 64 MD5 (FILE *file); // digest file, close, finalize 65 MD5 (ifstream& stream); // digest stream, close, finalize 66 67 // methods to acquire finalized result 68 unsigned char *raw_digest (); // digest as a 16-byte binary array 69 char * hex_digest (); // digest as a 33-byte ascii-hex string 70 friend ostream& operator<< (ostream&, MD5 context); 71 72 73 74 private: 75 76 // first, some types: 77 typedef unsigned int uint4; // assumes integer is 4 words long 78 typedef unsigned short int uint2; // assumes short integer is 2 words long 79 typedef unsigned char uint1; // assumes char is 1 word long 80 81 // next, the private data: 82 uint4 state[4]; 83 uint4 count[2]; // number of *bits*, mod 2^64 84 uint1 buffer[64]; // input buffer 85 uint1 digest[16]; 86 uint1 finalized; 87 88 // last, the private methods, mostly static: 89 void init (); // called by all constructors 90 void transform (uint1 *buffer); // does the real update work. Note 91 // that length is implied to be 64. 92 93 static void encode (uint1 *dest, uint4 *src, uint4 length); 94 static void decode (uint4 *dest, uint1 *src, uint4 length); 95 static void memcpy (uint1 *dest, uint1 *src, uint4 length); 96 static void memset (uint1 *start, uint1 val, uint4 length); 97 98 static inline uint4 rotate_left (uint4 x, uint4 n); 99 static inline uint4 F (uint4 x, uint4 y, uint4 z); 100 static inline uint4 G (uint4 x, uint4 y, uint4 z); 101 static inline uint4 H (uint4 x, uint4 y, uint4 z); 102 static inline uint4 I (uint4 x, uint4 y, uint4 z); 103 static inline void FF (uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, 104 uint4 s, uint4 ac); 105 static inline void GG (uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, 106 uint4 s, uint4 ac); 107 static inline void HH (uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, 108 uint4 s, uint4 ac); 109 static inline void II (uint4& a, uint4 b, uint4 c, uint4 d, uint4 x, 110 uint4 s, uint4 ac); 111 112 }; 113