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comparison lib/swig/swigwin-2.0.11/CCache/mdfour.c @ 1899:b3009adc0e2f

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author Nomad
date Mon, 21 Oct 2013 10:42:27 +0200
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1867:eb580660bbbb 1899:b3009adc0e2f
1 /*
2 a implementation of MD4 designed for use in the SMB authentication protocol
3 Copyright (C) Andrew Tridgell 1997-1998.
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20 #include "ccache.h"
21
22 /* NOTE: This code makes no attempt to be fast!
23
24 It assumes that a int is at least 32 bits long
25 */
26
27 static struct mdfour *m;
28
29 #define MASK32 (0xffffffff)
30
31 #define F(X,Y,Z) ((((X)&(Y)) | ((~(X))&(Z))))
32 #define G(X,Y,Z) ((((X)&(Y)) | ((X)&(Z)) | ((Y)&(Z))))
33 #define H(X,Y,Z) (((X)^(Y)^(Z)))
34 #define lshift(x,s) (((((x)<<(s))&MASK32) | (((x)>>(32-(s)))&MASK32)))
35
36 #define ROUND1(a,b,c,d,k,s) a = lshift((a + F(b,c,d) + M[k])&MASK32, s)
37 #define ROUND2(a,b,c,d,k,s) a = lshift((a + G(b,c,d) + M[k] + 0x5A827999)&MASK32,s)
38 #define ROUND3(a,b,c,d,k,s) a = lshift((a + H(b,c,d) + M[k] + 0x6ED9EBA1)&MASK32,s)
39
40 /* this applies md4 to 64 byte chunks */
41 static void mdfour64(uint32 *M)
42 {
43 uint32 AA, BB, CC, DD;
44 uint32 A,B,C,D;
45
46 A = m->A; B = m->B; C = m->C; D = m->D;
47 AA = A; BB = B; CC = C; DD = D;
48
49 ROUND1(A,B,C,D, 0, 3); ROUND1(D,A,B,C, 1, 7);
50 ROUND1(C,D,A,B, 2, 11); ROUND1(B,C,D,A, 3, 19);
51 ROUND1(A,B,C,D, 4, 3); ROUND1(D,A,B,C, 5, 7);
52 ROUND1(C,D,A,B, 6, 11); ROUND1(B,C,D,A, 7, 19);
53 ROUND1(A,B,C,D, 8, 3); ROUND1(D,A,B,C, 9, 7);
54 ROUND1(C,D,A,B, 10, 11); ROUND1(B,C,D,A, 11, 19);
55 ROUND1(A,B,C,D, 12, 3); ROUND1(D,A,B,C, 13, 7);
56 ROUND1(C,D,A,B, 14, 11); ROUND1(B,C,D,A, 15, 19);
57
58
59 ROUND2(A,B,C,D, 0, 3); ROUND2(D,A,B,C, 4, 5);
60 ROUND2(C,D,A,B, 8, 9); ROUND2(B,C,D,A, 12, 13);
61 ROUND2(A,B,C,D, 1, 3); ROUND2(D,A,B,C, 5, 5);
62 ROUND2(C,D,A,B, 9, 9); ROUND2(B,C,D,A, 13, 13);
63 ROUND2(A,B,C,D, 2, 3); ROUND2(D,A,B,C, 6, 5);
64 ROUND2(C,D,A,B, 10, 9); ROUND2(B,C,D,A, 14, 13);
65 ROUND2(A,B,C,D, 3, 3); ROUND2(D,A,B,C, 7, 5);
66 ROUND2(C,D,A,B, 11, 9); ROUND2(B,C,D,A, 15, 13);
67
68 ROUND3(A,B,C,D, 0, 3); ROUND3(D,A,B,C, 8, 9);
69 ROUND3(C,D,A,B, 4, 11); ROUND3(B,C,D,A, 12, 15);
70 ROUND3(A,B,C,D, 2, 3); ROUND3(D,A,B,C, 10, 9);
71 ROUND3(C,D,A,B, 6, 11); ROUND3(B,C,D,A, 14, 15);
72 ROUND3(A,B,C,D, 1, 3); ROUND3(D,A,B,C, 9, 9);
73 ROUND3(C,D,A,B, 5, 11); ROUND3(B,C,D,A, 13, 15);
74 ROUND3(A,B,C,D, 3, 3); ROUND3(D,A,B,C, 11, 9);
75 ROUND3(C,D,A,B, 7, 11); ROUND3(B,C,D,A, 15, 15);
76
77 A += AA; B += BB;
78 C += CC; D += DD;
79
80 A &= MASK32; B &= MASK32;
81 C &= MASK32; D &= MASK32;
82
83 m->A = A; m->B = B; m->C = C; m->D = D;
84 }
85
86 static void copy64(uint32 *M, const unsigned char *in)
87 {
88 int i;
89
90 for (i=0;i<16;i++)
91 M[i] = (in[i*4+3]<<24) | (in[i*4+2]<<16) |
92 (in[i*4+1]<<8) | (in[i*4+0]<<0);
93 }
94
95 static void copy4(unsigned char *out,uint32 x)
96 {
97 out[0] = x&0xFF;
98 out[1] = (x>>8)&0xFF;
99 out[2] = (x>>16)&0xFF;
100 out[3] = (x>>24)&0xFF;
101 }
102
103 void mdfour_begin(struct mdfour *md)
104 {
105 md->A = 0x67452301;
106 md->B = 0xefcdab89;
107 md->C = 0x98badcfe;
108 md->D = 0x10325476;
109 md->totalN = 0;
110 md->tail_len = 0;
111 }
112
113
114 static void mdfour_tail(const unsigned char *in, int n)
115 {
116 unsigned char buf[128];
117 uint32 M[16];
118 uint32 b;
119
120 m->totalN += n;
121
122 b = m->totalN * 8;
123
124 memset(buf, 0, 128);
125 if (n) memcpy(buf, in, n);
126 buf[n] = 0x80;
127
128 if (n <= 55) {
129 copy4(buf+56, b);
130 copy64(M, buf);
131 mdfour64(M);
132 } else {
133 copy4(buf+120, b);
134 copy64(M, buf);
135 mdfour64(M);
136 copy64(M, buf+64);
137 mdfour64(M);
138 }
139 }
140
141 void mdfour_update(struct mdfour *md, const unsigned char *in, int n)
142 {
143 uint32 M[16];
144
145 m = md;
146
147 if (in == NULL) {
148 mdfour_tail(md->tail, md->tail_len);
149 return;
150 }
151
152 if (md->tail_len) {
153 int len = 64 - md->tail_len;
154 if (len > n) len = n;
155 memcpy(md->tail+md->tail_len, in, len);
156 md->tail_len += len;
157 n -= len;
158 in += len;
159 if (md->tail_len == 64) {
160 copy64(M, md->tail);
161 mdfour64(M);
162 m->totalN += 64;
163 md->tail_len = 0;
164 }
165 }
166
167 while (n >= 64) {
168 copy64(M, in);
169 mdfour64(M);
170 in += 64;
171 n -= 64;
172 m->totalN += 64;
173 }
174
175 if (n) {
176 memcpy(md->tail, in, n);
177 md->tail_len = n;
178 }
179 }
180
181
182 void mdfour_result(struct mdfour *md, unsigned char *out)
183 {
184 m = md;
185
186 copy4(out, m->A);
187 copy4(out+4, m->B);
188 copy4(out+8, m->C);
189 copy4(out+12, m->D);
190 }
191
192
193 void mdfour(unsigned char *out, const unsigned char *in, int n)
194 {
195 struct mdfour md;
196 mdfour_begin(&md);
197 mdfour_update(&md, in, n);
198 mdfour_update(&md, NULL, 0);
199 mdfour_result(&md, out);
200 }
201
202 #ifdef TEST_MDFOUR
203 static void file_checksum1(char *fname)
204 {
205 int fd, i;
206 struct mdfour md;
207 unsigned char buf[1024], sum[16];
208 unsigned chunk;
209
210 fd = open(fname,O_RDONLY|O_BINARY);
211 if (fd == -1) {
212 perror("fname");
213 exit(1);
214 }
215
216 chunk = 1 + random() % (sizeof(buf) - 1);
217
218 mdfour_begin(&md);
219
220 while (1) {
221 int n = read(fd, buf, chunk);
222 if (n >= 0) {
223 mdfour_update(&md, buf, n);
224 }
225 if (n < chunk) break;
226 }
227
228 close(fd);
229
230 mdfour_update(&md, NULL, 0);
231
232 mdfour_result(&md, sum);
233
234 for (i=0;i<16;i++)
235 printf("%02x", sum[i]);
236 printf("\n");
237 }
238
239 #if 0
240 #include "../md4.h"
241
242 static void file_checksum2(char *fname)
243 {
244 int fd, i;
245 MDstruct md;
246 unsigned char buf[64], sum[16];
247
248 fd = open(fname,O_RDONLY|O_BINARY);
249 if (fd == -1) {
250 perror("fname");
251 exit(1);
252 }
253
254 MDbegin(&md);
255
256 while (1) {
257 int n = read(fd, buf, sizeof(buf));
258 if (n <= 0) break;
259 MDupdate(&md, buf, n*8);
260 }
261
262 if (!md.done) {
263 MDupdate(&md, buf, 0);
264 }
265
266 close(fd);
267
268 memcpy(sum, md.buffer, 16);
269
270 for (i=0;i<16;i++)
271 printf("%02x", sum[i]);
272 printf("\n");
273 }
274 #endif
275
276 int main(int argc, char *argv[])
277 {
278 file_checksum1(argv[1]);
279 #if 0
280 file_checksum2(argv[1]);
281 #endif
282 return 0;
283 }
284 #endif