1 /*
2 * This code has been derived by Michael Schwendt <mschwendt@yahoo.com>
3 * from original work by L. Peter Deutsch <ghost@aladdin.com>.
4 *
5 * The original C code (md5.c, md5.h) is available here:
6 * ftp://ftp.cs.wisc.edu/ghost/packages/md5.tar.gz
7 */
8
9 /*
10 Copyright (C) 1999 Aladdin Enterprises. All rights reserved.
11
12 This software is provided 'as-is', without any express or implied
13 warranty. In no event will the authors be held liable for any damages
14 arising from the use of this software.
15
16 Permission is granted to anyone to use this software for any purpose,
17 including commercial applications, and to alter it and redistribute it
18 freely, subject to the following restrictions:
19
20 1. The origin of this software must not be misrepresented; you must not
21 claim that you wrote the original software. If you use this software
22 in a product, an acknowledgment in the product documentation would be
23 appreciated but is not required.
24 2. Altered source versions must be plainly marked as such, and must not be
25 misrepresented as being the original software.
26 3. This notice may not be removed or altered from any source distribution.
27
28 L. Peter Deutsch
29 ghost@aladdin.com
30 */
31
32 #ifndef MD5_H
33 #define MD5_H
34
35 #include "MD5_Defs.h"
36
37 typedef unsigned char md5_byte_t; // 8-bit byte
38 typedef unsigned int md5_word_t; // 32-bit word
39
40 class MD5
41 {
42 public:
43 // Initialize the algorithm. Reset starting values.
44 MD5();
45
46 // Append a string to the message.
47 void append(const void* data, int nbytes);
48
49 // Finish the message.
50 void finish();
51
52 // Return pointer to 16-byte fingerprint.
53 const md5_byte_t* getDigest();
54
55 // Initialize the algorithm. Reset starting values.
56 void reset();
57
58 private:
59
60 /* Define the state of the MD5 Algorithm. */
61 md5_word_t count[2]; /* message length in bits, lsw first */
62 md5_word_t abcd[4]; /* digest buffer */
63 md5_byte_t buf[64]; /* accumulate block */
64
65 md5_byte_t digest[16];
66
67 md5_word_t tmpBuf[16];
68 const md5_word_t* X;
69
70 void
71 process(const md5_byte_t data[64]);
72
73 md5_word_t
74 ROTATE_LEFT(const md5_word_t x, const int n);
75
76 md5_word_t
77 F(const md5_word_t x, const md5_word_t y, const md5_word_t z);
78
79 md5_word_t
80 G(const md5_word_t x, const md5_word_t y, const md5_word_t z);
81
82 md5_word_t
83 H(const md5_word_t x, const md5_word_t y, const md5_word_t z);
84
85 md5_word_t
86 I(const md5_word_t x, const md5_word_t y, const md5_word_t z);
87
88 typedef md5_word_t (MD5::*md5func)(const md5_word_t x, const md5_word_t y, const md5_word_t z);
89
90 void
91 SET(md5func func, md5_word_t& a, md5_word_t& b, md5_word_t& c,
92 md5_word_t& d, const int k, const int s,
93 const md5_word_t Ti);
94 };
95
96 inline md5_word_t
ROTATE_LEFT(const md5_word_t x,const int n)97 MD5::ROTATE_LEFT(const md5_word_t x, const int n)
98 {
99 return ( (x<<n) | (x>>(32-n)) );
100 }
101
102 inline md5_word_t
F(const md5_word_t x,const md5_word_t y,const md5_word_t z)103 MD5::F(const md5_word_t x, const md5_word_t y, const md5_word_t z)
104 {
105 return ( (x&y) | (~x&z) );
106 }
107
108 inline md5_word_t
G(const md5_word_t x,const md5_word_t y,const md5_word_t z)109 MD5::G(const md5_word_t x, const md5_word_t y, const md5_word_t z)
110 {
111 return ( (x&z) | (y&~z) );
112 }
113
114 inline md5_word_t
H(const md5_word_t x,const md5_word_t y,const md5_word_t z)115 MD5::H(const md5_word_t x, const md5_word_t y, const md5_word_t z)
116 {
117 return ( x^y^z );
118 }
119
120 inline md5_word_t
I(const md5_word_t x,const md5_word_t y,const md5_word_t z)121 MD5::I(const md5_word_t x, const md5_word_t y, const md5_word_t z)
122 {
123 return ( y ^ (x|~z) );
124 }
125
126 inline void
SET(md5func func,md5_word_t & a,md5_word_t & b,md5_word_t & c,md5_word_t & d,const int k,const int s,const md5_word_t Ti)127 MD5::SET(md5func func, md5_word_t& a, md5_word_t& b, md5_word_t& c,
128 md5_word_t& d, const int k, const int s,
129 const md5_word_t Ti)
130 {
131 md5_word_t t = a + (this->*func)(b,c,d) + X[k] + Ti;
132 a = ROTATE_LEFT(t, s) + b;
133 }
134
135 #endif /* MD5_H */
136