Commit | Line | Data |
---|---|---|
8de330a3 | 1 | /* |
0f78b815 WD |
2 | * Unix SMB/Netbios implementation. |
3 | * Version 1.9. | |
4 | * An implementation of MD4 designed for use in the SMB authentication protocol. | |
5 | * | |
6 | * Copyright (C) 1997-1998 Andrew Tridgell | |
7 | * Copyright (C) 2005 Wayne Davison | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
e7c67065 WD |
19 | * You should have received a copy of the GNU General Public License along |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. | |
0f78b815 | 22 | */ |
8de330a3 AT |
23 | |
24 | #include "rsync.h" | |
25 | ||
26 | /* NOTE: This code makes no attempt to be fast! | |
0f78b815 WD |
27 | * |
28 | * It assumes that a int is at least 32 bits long. */ | |
8de330a3 AT |
29 | |
30 | static struct mdfour *m; | |
31 | ||
a7f8404e AT |
32 | #define MASK32 (0xffffffff) |
33 | ||
34 | #define F(X,Y,Z) ((((X)&(Y)) | ((~(X))&(Z)))) | |
35 | #define G(X,Y,Z) ((((X)&(Y)) | ((X)&(Z)) | ((Y)&(Z)))) | |
36 | #define H(X,Y,Z) (((X)^(Y)^(Z))) | |
37 | #define lshift(x,s) (((((x)<<(s))&MASK32) | (((x)>>(32-(s)))&MASK32))) | |
38 | ||
39 | #define ROUND1(a,b,c,d,k,s) a = lshift((a + F(b,c,d) + M[k])&MASK32, s) | |
40 | #define ROUND2(a,b,c,d,k,s) a = lshift((a + G(b,c,d) + M[k] + 0x5A827999)&MASK32,s) | |
41 | #define ROUND3(a,b,c,d,k,s) a = lshift((a + H(b,c,d) + M[k] + 0x6ED9EBA1)&MASK32,s) | |
8de330a3 AT |
42 | |
43 | /* this applies md4 to 64 byte chunks */ | |
44 | static void mdfour64(uint32 *M) | |
45 | { | |
8de330a3 | 46 | uint32 AA, BB, CC, DD; |
8de330a3 AT |
47 | uint32 A,B,C,D; |
48 | ||
8de330a3 AT |
49 | A = m->A; B = m->B; C = m->C; D = m->D; |
50 | AA = A; BB = B; CC = C; DD = D; | |
51 | ||
52 | ROUND1(A,B,C,D, 0, 3); ROUND1(D,A,B,C, 1, 7); | |
53 | ROUND1(C,D,A,B, 2, 11); ROUND1(B,C,D,A, 3, 19); | |
54 | ROUND1(A,B,C,D, 4, 3); ROUND1(D,A,B,C, 5, 7); | |
55 | ROUND1(C,D,A,B, 6, 11); ROUND1(B,C,D,A, 7, 19); | |
56 | ROUND1(A,B,C,D, 8, 3); ROUND1(D,A,B,C, 9, 7); | |
57 | ROUND1(C,D,A,B, 10, 11); ROUND1(B,C,D,A, 11, 19); | |
58 | ROUND1(A,B,C,D, 12, 3); ROUND1(D,A,B,C, 13, 7); | |
59 | ROUND1(C,D,A,B, 14, 11); ROUND1(B,C,D,A, 15, 19); | |
60 | ||
a7f8404e | 61 | |
8de330a3 AT |
62 | ROUND2(A,B,C,D, 0, 3); ROUND2(D,A,B,C, 4, 5); |
63 | ROUND2(C,D,A,B, 8, 9); ROUND2(B,C,D,A, 12, 13); | |
64 | ROUND2(A,B,C,D, 1, 3); ROUND2(D,A,B,C, 5, 5); | |
65 | ROUND2(C,D,A,B, 9, 9); ROUND2(B,C,D,A, 13, 13); | |
66 | ROUND2(A,B,C,D, 2, 3); ROUND2(D,A,B,C, 6, 5); | |
67 | ROUND2(C,D,A,B, 10, 9); ROUND2(B,C,D,A, 14, 13); | |
68 | ROUND2(A,B,C,D, 3, 3); ROUND2(D,A,B,C, 7, 5); | |
69 | ROUND2(C,D,A,B, 11, 9); ROUND2(B,C,D,A, 15, 13); | |
70 | ||
71 | ROUND3(A,B,C,D, 0, 3); ROUND3(D,A,B,C, 8, 9); | |
72 | ROUND3(C,D,A,B, 4, 11); ROUND3(B,C,D,A, 12, 15); | |
73 | ROUND3(A,B,C,D, 2, 3); ROUND3(D,A,B,C, 10, 9); | |
74 | ROUND3(C,D,A,B, 6, 11); ROUND3(B,C,D,A, 14, 15); | |
75 | ROUND3(A,B,C,D, 1, 3); ROUND3(D,A,B,C, 9, 9); | |
76 | ROUND3(C,D,A,B, 5, 11); ROUND3(B,C,D,A, 13, 15); | |
77 | ROUND3(A,B,C,D, 3, 3); ROUND3(D,A,B,C, 11, 9); | |
78 | ROUND3(C,D,A,B, 7, 11); ROUND3(B,C,D,A, 15, 15); | |
79 | ||
a7f8404e AT |
80 | A += AA; B += BB; |
81 | C += CC; D += DD; | |
8de330a3 | 82 | |
a7f8404e AT |
83 | A &= MASK32; B &= MASK32; |
84 | C &= MASK32; D &= MASK32; | |
8de330a3 AT |
85 | |
86 | m->A = A; m->B = B; m->C = C; m->D = D; | |
87 | } | |
88 | ||
89 | static void copy64(uint32 *M, unsigned char *in) | |
90 | { | |
91 | int i; | |
92 | ||
93 | for (i=0;i<16;i++) | |
94 | M[i] = (in[i*4+3]<<24) | (in[i*4+2]<<16) | | |
95 | (in[i*4+1]<<8) | (in[i*4+0]<<0); | |
96 | } | |
97 | ||
98 | static void copy4(unsigned char *out,uint32 x) | |
99 | { | |
100 | out[0] = x&0xFF; | |
101 | out[1] = (x>>8)&0xFF; | |
102 | out[2] = (x>>16)&0xFF; | |
103 | out[3] = (x>>24)&0xFF; | |
104 | } | |
105 | ||
106 | void mdfour_begin(struct mdfour *md) | |
107 | { | |
108 | md->A = 0x67452301; | |
109 | md->B = 0xefcdab89; | |
110 | md->C = 0x98badcfe; | |
111 | md->D = 0x10325476; | |
112 | md->totalN = 0; | |
fc1ae658 | 113 | md->totalN2 = 0; |
8de330a3 AT |
114 | } |
115 | ||
116 | ||
fc1ae658 | 117 | static void mdfour_tail(unsigned char *in, uint32 n) |
8de330a3 AT |
118 | { |
119 | unsigned char buf[128]; | |
120 | uint32 M[16]; | |
d04e9c51 | 121 | extern int protocol_version; |
fc1ae658 S |
122 | |
123 | /* | |
124 | * Count total number of bits, modulo 2^64 | |
125 | */ | |
126 | m->totalN += n << 3; | |
127 | if (m->totalN < (n << 3)) { | |
128 | m->totalN2++; | |
129 | } | |
130 | m->totalN2 += n >> 29; | |
8de330a3 AT |
131 | |
132 | memset(buf, 0, 128); | |
133 | if (n) memcpy(buf, in, n); | |
134 | buf[n] = 0x80; | |
135 | ||
136 | if (n <= 55) { | |
fc1ae658 S |
137 | copy4(buf+56, m->totalN); |
138 | /* | |
139 | * Prior to protocol version 27 only the number of bits | |
140 | * modulo 2^32 was included. MD4 requires the number | |
141 | * of bits modulo 2^64, which was fixed starting with | |
142 | * protocol version 27. | |
143 | */ | |
d04e9c51 | 144 | if (protocol_version >= 27) { |
fc1ae658 S |
145 | copy4(buf+60, m->totalN2); |
146 | } | |
8de330a3 AT |
147 | copy64(M, buf); |
148 | mdfour64(M); | |
149 | } else { | |
fc1ae658 S |
150 | copy4(buf+120, m->totalN); |
151 | /* | |
152 | * Prior to protocol version 27 only the number of bits | |
153 | * modulo 2^32 was included. MD4 requires the number | |
154 | * of bits modulo 2^64, which was fixed starting with | |
155 | * protocol version 27. | |
156 | */ | |
d04e9c51 | 157 | if (protocol_version >= 27) { |
fc1ae658 S |
158 | copy4(buf+124, m->totalN2); |
159 | } | |
8de330a3 AT |
160 | copy64(M, buf); |
161 | mdfour64(M); | |
162 | copy64(M, buf+64); | |
163 | mdfour64(M); | |
164 | } | |
8de330a3 AT |
165 | } |
166 | ||
fc1ae658 | 167 | void mdfour_update(struct mdfour *md, unsigned char *in, uint32 n) |
8de330a3 AT |
168 | { |
169 | uint32 M[16]; | |
170 | ||
8de330a3 AT |
171 | m = md; |
172 | ||
fc1ae658 S |
173 | if (n == 0) mdfour_tail(in, n); |
174 | ||
8de330a3 AT |
175 | while (n >= 64) { |
176 | copy64(M, in); | |
177 | mdfour64(M); | |
178 | in += 64; | |
179 | n -= 64; | |
fc1ae658 S |
180 | m->totalN += 64 << 3; |
181 | if (m->totalN < 64 << 3) { | |
182 | m->totalN2++; | |
183 | } | |
8de330a3 AT |
184 | } |
185 | ||
186 | if (n) mdfour_tail(in, n); | |
187 | } | |
188 | ||
189 | ||
190 | void mdfour_result(struct mdfour *md, unsigned char *out) | |
191 | { | |
192 | m = md; | |
193 | ||
194 | copy4(out, m->A); | |
195 | copy4(out+4, m->B); | |
196 | copy4(out+8, m->C); | |
197 | copy4(out+12, m->D); | |
198 | } | |
199 | ||
200 | ||
201 | void mdfour(unsigned char *out, unsigned char *in, int n) | |
202 | { | |
203 | struct mdfour md; | |
204 | mdfour_begin(&md); | |
205 | mdfour_update(&md, in, n); | |
206 | mdfour_result(&md, out); | |
207 | } | |
208 | ||
209 | #ifdef TEST_MDFOUR | |
d82773ff WD |
210 | int protocol_version = 28; |
211 | ||
8de330a3 AT |
212 | static void file_checksum1(char *fname) |
213 | { | |
d82773ff | 214 | int fd, i, was_multiple_of_64 = 1; |
8de330a3 | 215 | struct mdfour md; |
2fb27e91 AT |
216 | unsigned char buf[64*1024], sum[16]; |
217 | ||
8de330a3 AT |
218 | fd = open(fname,O_RDONLY); |
219 | if (fd == -1) { | |
220 | perror("fname"); | |
221 | exit(1); | |
222 | } | |
223 | ||
224 | mdfour_begin(&md); | |
225 | ||
226 | while (1) { | |
227 | int n = read(fd, buf, sizeof(buf)); | |
d82773ff WD |
228 | if (n <= 0) |
229 | break; | |
230 | was_multiple_of_64 = !(n % 64); | |
8de330a3 AT |
231 | mdfour_update(&md, buf, n); |
232 | } | |
d82773ff WD |
233 | if (was_multiple_of_64 && protocol_version >= 27) |
234 | mdfour_update(&md, buf, 0); | |
8de330a3 AT |
235 | |
236 | close(fd); | |
237 | ||
238 | mdfour_result(&md, sum); | |
239 | ||
240 | for (i=0;i<16;i++) | |
241 | printf("%02X", sum[i]); | |
242 | printf("\n"); | |
243 | } | |
244 | ||
2fb27e91 | 245 | #if 0 |
8de330a3 AT |
246 | #include "../md4.h" |
247 | ||
248 | static void file_checksum2(char *fname) | |
249 | { | |
250 | int fd, i; | |
251 | MDstruct md; | |
252 | unsigned char buf[64], sum[16]; | |
253 | ||
254 | fd = open(fname,O_RDONLY); | |
255 | if (fd == -1) { | |
256 | perror("fname"); | |
257 | exit(1); | |
258 | } | |
259 | ||
260 | MDbegin(&md); | |
261 | ||
262 | while (1) { | |
263 | int n = read(fd, buf, sizeof(buf)); | |
264 | if (n <= 0) break; | |
265 | MDupdate(&md, buf, n*8); | |
266 | } | |
267 | ||
268 | if (!md.done) { | |
269 | MDupdate(&md, buf, 0); | |
270 | } | |
271 | ||
272 | close(fd); | |
273 | ||
274 | memcpy(sum, md.buffer, 16); | |
275 | ||
276 | for (i=0;i<16;i++) | |
277 | printf("%02X", sum[i]); | |
278 | printf("\n"); | |
279 | } | |
2fb27e91 | 280 | #endif |
8de330a3 AT |
281 | |
282 | int main(int argc, char *argv[]) | |
283 | { | |
284 | file_checksum1(argv[1]); | |
2fb27e91 | 285 | #if 0 |
8de330a3 | 286 | file_checksum2(argv[1]); |
2fb27e91 | 287 | #endif |
8de330a3 AT |
288 | return 0; |
289 | } | |
290 | #endif |