aboutsummaryrefslogtreecommitdiff
path: root/src/md5.cpp
blob: ed7e4acc23304e5b13cda6c6ca82e6ba15093313 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "md5.h"

// This is a fun macro that tells us where the length char goes after the data
// section in the padded data segment.  It's short for OBfuscation LOCaction.
#define OBLOC(len)	((((len + 64) >> 9) << 4) + 14)
// This performs a wrapping bitwise shift, kinda' fun!

#define bit_roll( num, cnt ) \
	(((num) << (cnt)) | (((num) >> (32 - (cnt))) & ~(-1<<(cnt))))

//#define md5_cmn( q, a, b, x, s, t ) (bit_roll((a + q + x + t), s) + b)

// The following are handy wrappers for the cmn function
#define md5_ff( a, b, c, d, x, s, t ) \
	(md5_cmn((b & c) | ((~b) & d), a, b, x, s, t))

#define md5_gg( a, b, c, d, x, s, t ) \
	(md5_cmn((b & d) | (c & (~d)), a, b, x, s, t))

#define md5_hh( a, b, c, d, x, s, t ) \
	(md5_cmn(b ^ c ^ d, a, b, x, s, t))

#define md5_ii( a, b, c, d, x, s, t ) \
	(md5_cmn(c ^ (b | (~d)), a, b, x, s, t))

inline long md5_cmn( long q, long a, long b, long x, long s, long t )
{
	return bit_roll((a + q + x + t), s) + b;
}

md5::md5()
{
}

md5::~md5()
{
}

/*
 * Calculate the MD5 of an array of little-endian words, and a bit length
 */
void md5::core_md5( long *x, long len, md5sum *output )
{
	long a =  1732584193, olda;
	long b = -271733879, oldb;
	long c = -1732584194, oldc;
	long d =  271733878, oldd;

	for( long i = 0; i < len; i += 16 )
	{
		olda = a;
		oldb = b;
		oldc = c;
		oldd = d;
 
		a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
		d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
		c = md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
		b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
		a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
		d = md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
		c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
		b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
		a = md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
		d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
		c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
		b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
		a = md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
		d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
		c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
		b = md5_ff(b, c, d, a, x[i+15], 22,  1236535329);

		a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
		d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
		c = md5_gg(c, d, a, b, x[i+11], 14,  643717713);
		b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
		a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
		d = md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
		c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
		b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
		a = md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
		d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
		c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
		b = md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
		a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
		d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
		c = md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
		b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);

		a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
		d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
		c = md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
		b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
		a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
		d = md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
		c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
		b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
		a = md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
		d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
		c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
		b = md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
		a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
		d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
		c = md5_hh(c, d, a, b, x[i+15], 16,  530742520);
		b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);

		a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
		d = md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
		c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
		b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
		a = md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
		d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
		c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
		b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
		a = md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
		d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
		c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
		b = md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
		a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
		d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
		c = md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
		b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);

		a = a + olda;
		b = b + oldb;
		c = c + oldc;
		d = d + oldd;
	}
  
	output->data[0] = a;
	output->data[1] = b;
	output->data[2] = c;
	output->data[3] = d;
	delete[] x;
} 

long *md5::c2l( const char *str, long len, long *nNewLen )
{
	long len8 = len*8;
	long mlen = OBLOC( len8 );
    long flen = (((mlen/16)+((mlen%16)?(1):(0))))*16;
	long *aBin = new long[flen];
	memset( aBin, 0, flen );
	
	for( long i = 0; i < len8; i+=8 )
	{
		aBin[i>>5] |= ((long)str[i/8]) << (i%32);
	}

	aBin[len8 >> 5] |= 0x80 << ((len8) % 32);
	aBin[OBLOC( len8 )] = len8;

	(*nNewLen) = flen;

	return aBin;
}

void md5::l2hexstr( long *binarray, char *str )
{
	static const char hex_tab[] = {"0123456789abcdef"};
	//static char str[33];
	
	int k = 0;
	for( int i = 0; i < 16; i++)
	{
		str[k++] = hex_tab[(binarray[i>>2] >> ((i%4)*8+4)) & 0xF];
		str[k++] = hex_tab[(binarray[i>>2] >> ((i%4)*8  )) & 0xF];
	}
}

void md5::sumString( md5sum *pSum, const char *sStr )
{
	sumData( pSum, sStr, strlen( sStr ) );
}

void md5::sumData( md5sum *pSum, const char *aData, long nLen )
{
	long nNewLen;
	long *aOb = c2l( aData, nLen, &nNewLen );
	core_md5( aOb, nNewLen, pSum );
}

void md5::sumToHex( md5sum *pSum, char *sHex )
{
	l2hexstr( pSum->data, sHex );
}