1 /* $OpenBSD: rmd160.c,v 1.3 2001/09/26 21:40:13 markus Exp $ */
2 /*-
3 * Copyright (c) 2001 Markus Friedl. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 /*
27 * Preneel, Bosselaers, Dobbertin, "The Cryptographic Hash Function RIPEMD-160",
28 * RSA Laboratories, CryptoBytes, Volume 3, Number 2, Autumn 1997,
29 * ftp://ftp.rsasecurity.com/pub/cryptobytes/crypto3n2.pdf
30 */
31
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD: src/sys/opencrypto/rmd160.c,v 1.3 2005/01/07 02:29:16 imp Exp $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/endian.h>
38 #include <opencrypto/rmd160.h>
39
40 #define PUT_64BIT_LE(cp, value) do { \
41 (cp)[7] = (value) >> 56; \
42 (cp)[6] = (value) >> 48; \
43 (cp)[5] = (value) >> 40; \
44 (cp)[4] = (value) >> 32; \
45 (cp)[3] = (value) >> 24; \
46 (cp)[2] = (value) >> 16; \
47 (cp)[1] = (value) >> 8; \
48 (cp)[0] = (value); } while (0)
49
50 #define PUT_32BIT_LE(cp, value) do { \
51 (cp)[3] = (value) >> 24; \
52 (cp)[2] = (value) >> 16; \
53 (cp)[1] = (value) >> 8; \
54 (cp)[0] = (value); } while (0)
55
56 #define H0 0x67452301U
57 #define H1 0xEFCDAB89U
58 #define H2 0x98BADCFEU
59 #define H3 0x10325476U
60 #define H4 0xC3D2E1F0U
61
62 #define K0 0x00000000U
63 #define K1 0x5A827999U
64 #define K2 0x6ED9EBA1U
65 #define K3 0x8F1BBCDCU
66 #define K4 0xA953FD4EU
67
68 #define KK0 0x50A28BE6U
69 #define KK1 0x5C4DD124U
70 #define KK2 0x6D703EF3U
71 #define KK3 0x7A6D76E9U
72 #define KK4 0x00000000U
73
74 /* rotate x left n bits. */
75 #define ROL(n, x) (((x) << (n)) | ((x) >> (32-(n))))
76
77 #define F0(x, y, z) ((x) ^ (y) ^ (z))
78 #define F1(x, y, z) (((x) & (y)) | ((~x) & (z)))
79 #define F2(x, y, z) (((x) | (~y)) ^ (z))
80 #define F3(x, y, z) (((x) & (z)) | ((y) & (~z)))
81 #define F4(x, y, z) ((x) ^ ((y) | (~z)))
82
83 #define R(a, b, c, d, e, Fj, Kj, sj, rj) \
84 do { \
85 a = ROL(sj, a + Fj(b,c,d) + X(rj) + Kj) + e; \
86 c = ROL(10, c); \
87 } while(0)
88
89 #define X(i) x[i]
90
91 static u_char PADDING[64] = {
92 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
93 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
94 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
95 };
96
97 void
98 RMD160Init(RMD160_CTX *ctx)
99 {
100 ctx->count = 0;
101 ctx->state[0] = H0;
102 ctx->state[1] = H1;
103 ctx->state[2] = H2;
104 ctx->state[3] = H3;
105 ctx->state[4] = H4;
106 }
107
108 void
109 RMD160Update(RMD160_CTX *ctx, const u_char *input, u_int32_t len)
110 {
111 u_int32_t have, off, need;
112
113 have = (ctx->count/8) % 64;
114 need = 64 - have;
115 ctx->count += 8 * len;
116 off = 0;
117
118 if (len >= need) {
119 if (have) {
120 memcpy(ctx->buffer + have, input, need);
121 RMD160Transform(ctx->state, ctx->buffer);
122 off = need;
123 have = 0;
124 }
125 /* now the buffer is empty */
126 while (off + 64 <= len) {
127 RMD160Transform(ctx->state, input+off);
128 off += 64;
129 }
130 }
131 if (off < len)
132 memcpy(ctx->buffer + have, input+off, len-off);
133 }
134
135 void
136 RMD160Final(u_char digest[20], RMD160_CTX *ctx)
137 {
138 int i;
139 u_char size[8];
140 u_int32_t padlen;
141
142 PUT_64BIT_LE(size, ctx->count);
143
144 /*
145 * pad to 64 byte blocks, at least one byte from PADDING plus 8 bytes
146 * for the size
147 */
148 padlen = 64 - ((ctx->count/8) % 64);
149 if (padlen < 1 + 8)
150 padlen += 64;
151 RMD160Update(ctx, PADDING, padlen - 8); /* padlen - 8 <= 64 */
152 RMD160Update(ctx, size, 8);
153
154 if (digest != NULL)
155 for (i = 0; i < 5; i++)
156 PUT_32BIT_LE(digest + i*4, ctx->state[i]);
157
158 memset(ctx, 0, sizeof (*ctx));
159 }
160
161 void
162 RMD160Transform(u_int32_t state[5], const u_char block[64])
163 {
164 u_int32_t a, b, c, d, e, aa, bb, cc, dd, ee, t, x[16];
165
166 #if BYTE_ORDER == LITTLE_ENDIAN
167 memcpy(x, block, 64);
168 #else
169 int i;
170
171 for (i = 0; i < 16; i++)
172 x[i] = bswap32(*(const u_int32_t*)(block+i*4));
173 #endif
174
175 a = state[0];
176 b = state[1];
177 c = state[2];
178 d = state[3];
179 e = state[4];
180
181 /* Round 1 */
182 R(a, b, c, d, e, F0, K0, 11, 0);
183 R(e, a, b, c, d, F0, K0, 14, 1);
184 R(d, e, a, b, c, F0, K0, 15, 2);
185 R(c, d, e, a, b, F0, K0, 12, 3);
186 R(b, c, d, e, a, F0, K0, 5, 4);
187 R(a, b, c, d, e, F0, K0, 8, 5);
188 R(e, a, b, c, d, F0, K0, 7, 6);
189 R(d, e, a, b, c, F0, K0, 9, 7);
190 R(c, d, e, a, b, F0, K0, 11, 8);
191 R(b, c, d, e, a, F0, K0, 13, 9);
192 R(a, b, c, d, e, F0, K0, 14, 10);
193 R(e, a, b, c, d, F0, K0, 15, 11);
194 R(d, e, a, b, c, F0, K0, 6, 12);
195 R(c, d, e, a, b, F0, K0, 7, 13);
196 R(b, c, d, e, a, F0, K0, 9, 14);
197 R(a, b, c, d, e, F0, K0, 8, 15); /* #15 */
198 /* Round 2 */
199 R(e, a, b, c, d, F1, K1, 7, 7);
200 R(d, e, a, b, c, F1, K1, 6, 4);
201 R(c, d, e, a, b, F1, K1, 8, 13);
202 R(b, c, d, e, a, F1, K1, 13, 1);
203 R(a, b, c, d, e, F1, K1, 11, 10);
204 R(e, a, b, c, d, F1, K1, 9, 6);
205 R(d, e, a, b, c, F1, K1, 7, 15);
206 R(c, d, e, a, b, F1, K1, 15, 3);
207 R(b, c, d, e, a, F1, K1, 7, 12);
208 R(a, b, c, d, e, F1, K1, 12, 0);
209 R(e, a, b, c, d, F1, K1, 15, 9);
210 R(d, e, a, b, c, F1, K1, 9, 5);
211 R(c, d, e, a, b, F1, K1, 11, 2);
212 R(b, c, d, e, a, F1, K1, 7, 14);
213 R(a, b, c, d, e, F1, K1, 13, 11);
214 R(e, a, b, c, d, F1, K1, 12, 8); /* #31 */
215 /* Round 3 */
216 R(d, e, a, b, c, F2, K2, 11, 3);
217 R(c, d, e, a, b, F2, K2, 13, 10);
218 R(b, c, d, e, a, F2, K2, 6, 14);
219 R(a, b, c, d, e, F2, K2, 7, 4);
220 R(e, a, b, c, d, F2, K2, 14, 9);
221 R(d, e, a, b, c, F2, K2, 9, 15);
222 R(c, d, e, a, b, F2, K2, 13, 8);
223 R(b, c, d, e, a, F2, K2, 15, 1);
224 R(a, b, c, d, e, F2, K2, 14, 2);
225 R(e, a, b, c, d, F2, K2, 8, 7);
226 R(d, e, a, b, c, F2, K2, 13, 0);
227 R(c, d, e, a, b, F2, K2, 6, 6);
228 R(b, c, d, e, a, F2, K2, 5, 13);
229 R(a, b, c, d, e, F2, K2, 12, 11);
230 R(e, a, b, c, d, F2, K2, 7, 5);
231 R(d, e, a, b, c, F2, K2, 5, 12); /* #47 */
232 /* Round 4 */
233 R(c, d, e, a, b, F3, K3, 11, 1);
234 R(b, c, d, e, a, F3, K3, 12, 9);
235 R(a, b, c, d, e, F3, K3, 14, 11);
236 R(e, a, b, c, d, F3, K3, 15, 10);
237 R(d, e, a, b, c, F3, K3, 14, 0);
238 R(c, d, e, a, b, F3, K3, 15, 8);
239 R(b, c, d, e, a, F3, K3, 9, 12);
240 R(a, b, c, d, e, F3, K3, 8, 4);
241 R(e, a, b, c, d, F3, K3, 9, 13);
242 R(d, e, a, b, c, F3, K3, 14, 3);
243 R(c, d, e, a, b, F3, K3, 5, 7);
244 R(b, c, d, e, a, F3, K3, 6, 15);
245 R(a, b, c, d, e, F3, K3, 8, 14);
246 R(e, a, b, c, d, F3, K3, 6, 5);
247 R(d, e, a, b, c, F3, K3, 5, 6);
248 R(c, d, e, a, b, F3, K3, 12, 2); /* #63 */
249 /* Round 5 */
250 R(b, c, d, e, a, F4, K4, 9, 4);
251 R(a, b, c, d, e, F4, K4, 15, 0);
252 R(e, a, b, c, d, F4, K4, 5, 5);
253 R(d, e, a, b, c, F4, K4, 11, 9);
254 R(c, d, e, a, b, F4, K4, 6, 7);
255 R(b, c, d, e, a, F4, K4, 8, 12);
256 R(a, b, c, d, e, F4, K4, 13, 2);
257 R(e, a, b, c, d, F4, K4, 12, 10);
258 R(d, e, a, b, c, F4, K4, 5, 14);
259 R(c, d, e, a, b, F4, K4, 12, 1);
260 R(b, c, d, e, a, F4, K4, 13, 3);
261 R(a, b, c, d, e, F4, K4, 14, 8);
262 R(e, a, b, c, d, F4, K4, 11, 11);
263 R(d, e, a, b, c, F4, K4, 8, 6);
264 R(c, d, e, a, b, F4, K4, 5, 15);
265 R(b, c, d, e, a, F4, K4, 6, 13); /* #79 */
266
267 aa = a ; bb = b; cc = c; dd = d; ee = e;
268
269 a = state[0];
270 b = state[1];
271 c = state[2];
272 d = state[3];
273 e = state[4];
274
275 /* Parallel round 1 */
276 R(a, b, c, d, e, F4, KK0, 8, 5);
277 R(e, a, b, c, d, F4, KK0, 9, 14);
278 R(d, e, a, b, c, F4, KK0, 9, 7);
279 R(c, d, e, a, b, F4, KK0, 11, 0);
280 R(b, c, d, e, a, F4, KK0, 13, 9);
281 R(a, b, c, d, e, F4, KK0, 15, 2);
282 R(e, a, b, c, d, F4, KK0, 15, 11);
283 R(d, e, a, b, c, F4, KK0, 5, 4);
284 R(c, d, e, a, b, F4, KK0, 7, 13);
285 R(b, c, d, e, a, F4, KK0, 7, 6);
286 R(a, b, c, d, e, F4, KK0, 8, 15);
287 R(e, a, b, c, d, F4, KK0, 11, 8);
288 R(d, e, a, b, c, F4, KK0, 14, 1);
289 R(c, d, e, a, b, F4, KK0, 14, 10);
290 R(b, c, d, e, a, F4, KK0, 12, 3);
291 R(a, b, c, d, e, F4, KK0, 6, 12); /* #15 */
292 /* Parallel round 2 */
293 R(e, a, b, c, d, F3, KK1, 9, 6);
294 R(d, e, a, b, c, F3, KK1, 13, 11);
295 R(c, d, e, a, b, F3, KK1, 15, 3);
296 R(b, c, d, e, a, F3, KK1, 7, 7);
297 R(a, b, c, d, e, F3, KK1, 12, 0);
298 R(e, a, b, c, d, F3, KK1, 8, 13);
299 R(d, e, a, b, c, F3, KK1, 9, 5);
300 R(c, d, e, a, b, F3, KK1, 11, 10);
301 R(b, c, d, e, a, F3, KK1, 7, 14);
302 R(a, b, c, d, e, F3, KK1, 7, 15);
303 R(e, a, b, c, d, F3, KK1, 12, 8);
304 R(d, e, a, b, c, F3, KK1, 7, 12);
305 R(c, d, e, a, b, F3, KK1, 6, 4);
306 R(b, c, d, e, a, F3, KK1, 15, 9);
307 R(a, b, c, d, e, F3, KK1, 13, 1);
308 R(e, a, b, c, d, F3, KK1, 11, 2); /* #31 */
309 /* Parallel round 3 */
310 R(d, e, a, b, c, F2, KK2, 9, 15);
311 R(c, d, e, a, b, F2, KK2, 7, 5);
312 R(b, c, d, e, a, F2, KK2, 15, 1);
313 R(a, b, c, d, e, F2, KK2, 11, 3);
314 R(e, a, b, c, d, F2, KK2, 8, 7);
315 R(d, e, a, b, c, F2, KK2, 6, 14);
316 R(c, d, e, a, b, F2, KK2, 6, 6);
317 R(b, c, d, e, a, F2, KK2, 14, 9);
318 R(a, b, c, d, e, F2, KK2, 12, 11);
319 R(e, a, b, c, d, F2, KK2, 13, 8);
320 R(d, e, a, b, c, F2, KK2, 5, 12);
321 R(c, d, e, a, b, F2, KK2, 14, 2);
322 R(b, c, d, e, a, F2, KK2, 13, 10);
323 R(a, b, c, d, e, F2, KK2, 13, 0);
324 R(e, a, b, c, d, F2, KK2, 7, 4);
325 R(d, e, a, b, c, F2, KK2, 5, 13); /* #47 */
326 /* Parallel round 4 */
327 R(c, d, e, a, b, F1, KK3, 15, 8);
328 R(b, c, d, e, a, F1, KK3, 5, 6);
329 R(a, b, c, d, e, F1, KK3, 8, 4);
330 R(e, a, b, c, d, F1, KK3, 11, 1);
331 R(d, e, a, b, c, F1, KK3, 14, 3);
332 R(c, d, e, a, b, F1, KK3, 14, 11);
333 R(b, c, d, e, a, F1, KK3, 6, 15);
334 R(a, b, c, d, e, F1, KK3, 14, 0);
335 R(e, a, b, c, d, F1, KK3, 6, 5);
336 R(d, e, a, b, c, F1, KK3, 9, 12);
337 R(c, d, e, a, b, F1, KK3, 12, 2);
338 R(b, c, d, e, a, F1, KK3, 9, 13);
339 R(a, b, c, d, e, F1, KK3, 12, 9);
340 R(e, a, b, c, d, F1, KK3, 5, 7);
341 R(d, e, a, b, c, F1, KK3, 15, 10);
342 R(c, d, e, a, b, F1, KK3, 8, 14); /* #63 */
343 /* Parallel round 5 */
344 R(b, c, d, e, a, F0, KK4, 8, 12);
345 R(a, b, c, d, e, F0, KK4, 5, 15);
346 R(e, a, b, c, d, F0, KK4, 12, 10);
347 R(d, e, a, b, c, F0, KK4, 9, 4);
348 R(c, d, e, a, b, F0, KK4, 12, 1);
349 R(b, c, d, e, a, F0, KK4, 5, 5);
350 R(a, b, c, d, e, F0, KK4, 14, 8);
351 R(e, a, b, c, d, F0, KK4, 6, 7);
352 R(d, e, a, b, c, F0, KK4, 8, 6);
353 R(c, d, e, a, b, F0, KK4, 13, 2);
354 R(b, c, d, e, a, F0, KK4, 6, 13);
355 R(a, b, c, d, e, F0, KK4, 5, 14);
356 R(e, a, b, c, d, F0, KK4, 15, 0);
357 R(d, e, a, b, c, F0, KK4, 13, 3);
358 R(c, d, e, a, b, F0, KK4, 11, 9);
359 R(b, c, d, e, a, F0, KK4, 11, 11); /* #79 */
360
361 t = state[1] + cc + d;
362 state[1] = state[2] + dd + e;
363 state[2] = state[3] + ee + a;
364 state[3] = state[4] + aa + b;
365 state[4] = state[0] + bb + c;
366 state[0] = t;
367 }
368
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