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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: rmd256.c,v 1.2 2001/02/23 09:02:52 mdw Exp $ |
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4 | * |
5 | * The RIPEMD-256 message digest function |
6 | * |
7 | * (c) 1998 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of Catacomb. |
13 | * |
14 | * Catacomb is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU Library General Public License as |
16 | * published by the Free Software Foundation; either version 2 of the |
17 | * License, or (at your option) any later version. |
18 | * |
19 | * Catacomb is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU Library General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU Library General Public |
25 | * License along with Catacomb; if not, write to the Free |
26 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
27 | * MA 02111-1307, USA. |
28 | */ |
29 | |
30 | /*----- Revision history --------------------------------------------------* |
31 | * |
32 | * $Log: rmd256.c,v $ |
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33 | * Revision 1.2 2001/02/23 09:02:52 mdw |
34 | * Fix poorly copied comment. |
35 | * |
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36 | * Revision 1.1 2000/07/09 21:30:31 mdw |
37 | * New RIPEMD variants. |
38 | * |
39 | */ |
40 | |
41 | /*----- Header files ------------------------------------------------------*/ |
42 | |
43 | #include <mLib/bits.h> |
44 | |
45 | #include "ghash.h" |
46 | #include "ghash-def.h" |
47 | #include "hash.h" |
48 | #include "rmd256.h" |
49 | |
50 | /*----- Main code ---------------------------------------------------------*/ |
51 | |
52 | /* --- @rmd256_compress@ --- * |
53 | * |
54 | * Arguments: @rmd256_ctx *ctx@ = pointer to context block |
55 | * @const void *sbuf@ = pointer to buffer of appropriate size |
56 | * |
57 | * Returns: --- |
58 | * |
59 | * Use: RIPEMD-256 compression function. |
60 | */ |
61 | |
62 | void rmd256_compress(rmd256_ctx *ctx, const void *sbuf) |
63 | { |
64 | uint32 a, b, c, d; |
65 | uint32 A, B, C, D; |
66 | uint32 buf[16]; |
67 | |
68 | /* --- Fetch the chaining variables --- */ |
69 | |
70 | a = ctx->a; |
71 | b = ctx->b; |
72 | c = ctx->c; |
73 | d = ctx->d; |
74 | A = ctx->A; |
75 | B = ctx->B; |
76 | C = ctx->C; |
77 | D = ctx->D; |
78 | |
79 | /* --- Fetch the buffer contents --- */ |
80 | |
81 | { |
82 | int i; |
83 | const octet *p; |
84 | |
85 | for (i = 0, p = sbuf; i < 16; i++, p += 4) |
86 | buf[i] = LOAD32_L(p); |
87 | } |
88 | |
89 | /* --- Definitions for round functions --- */ |
90 | |
91 | #define F(x, y, z) ((x) ^ (y) ^ (z)) |
92 | #define G(x, y, z) (((x) & (y)) | (~(x) & (z))) |
93 | #define H(x, y, z) (((x) | ~(y)) ^ (z)) |
94 | #define I(x, y, z) (((x) & (z)) | ((y) & ~(z))) |
95 | |
96 | #define T(w, x, y, z, i, r, f, k) do { \ |
97 | uint32 _t = w + f(x, y, z) + buf[i] + k; \ |
98 | w = ROL32(_t, r); \ |
99 | } while (0) |
100 | |
101 | #define F1(w, x, y, z, i, r) T(w, x, y, z, i, r, F, 0x00000000) |
102 | #define G1(w, x, y, z, i, r) T(w, x, y, z, i, r, G, 0x5a827999) |
103 | #define H1(w, x, y, z, i, r) T(w, x, y, z, i, r, H, 0x6ed9eba1) |
104 | #define I1(w, x, y, z, i, r) T(w, x, y, z, i, r, I, 0x8f1bbcdc) |
105 | |
106 | #define F2(w, x, y, z, i, r) T(w, x, y, z, i, r, I, 0x50a28be6) |
107 | #define G2(w, x, y, z, i, r) T(w, x, y, z, i, r, H, 0x5c4dd124) |
108 | #define H2(w, x, y, z, i, r) T(w, x, y, z, i, r, G, 0x6d703ef3) |
109 | #define I2(w, x, y, z, i, r) T(w, x, y, z, i, r, F, 0x00000000) |
110 | |
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111 | /* --- We must do both sides together --- */ |
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112 | |
113 | F1(a, b, c, d, 0, 11); |
114 | F1(d, a, b, c, 1, 14); |
115 | F1(c, d, a, b, 2, 15); |
116 | F1(b, c, d, a, 3, 12); |
117 | F1(a, b, c, d, 4, 5); |
118 | F1(d, a, b, c, 5, 8); |
119 | F1(c, d, a, b, 6, 7); |
120 | F1(b, c, d, a, 7, 9); |
121 | F1(a, b, c, d, 8, 11); |
122 | F1(d, a, b, c, 9, 13); |
123 | F1(c, d, a, b, 10, 14); |
124 | F1(b, c, d, a, 11, 15); |
125 | F1(a, b, c, d, 12, 6); |
126 | F1(d, a, b, c, 13, 7); |
127 | F1(c, d, a, b, 14, 9); |
128 | F1(b, c, d, a, 15, 8); |
129 | |
130 | F2(A, B, C, D, 5, 8); |
131 | F2(D, A, B, C, 14, 9); |
132 | F2(C, D, A, B, 7, 9); |
133 | F2(B, C, D, A, 0, 11); |
134 | F2(A, B, C, D, 9, 13); |
135 | F2(D, A, B, C, 2, 15); |
136 | F2(C, D, A, B, 11, 15); |
137 | F2(B, C, D, A, 4, 5); |
138 | F2(A, B, C, D, 13, 7); |
139 | F2(D, A, B, C, 6, 7); |
140 | F2(C, D, A, B, 15, 8); |
141 | F2(B, C, D, A, 8, 11); |
142 | F2(A, B, C, D, 1, 14); |
143 | F2(D, A, B, C, 10, 14); |
144 | F2(C, D, A, B, 3, 12); |
145 | F2(B, C, D, A, 12, 6); |
146 | |
147 | G1(A, b, c, d, 7, 7); |
148 | G1(d, A, b, c, 4, 6); |
149 | G1(c, d, A, b, 13, 8); |
150 | G1(b, c, d, A, 1, 13); |
151 | G1(A, b, c, d, 10, 11); |
152 | G1(d, A, b, c, 6, 9); |
153 | G1(c, d, A, b, 15, 7); |
154 | G1(b, c, d, A, 3, 15); |
155 | G1(A, b, c, d, 12, 7); |
156 | G1(d, A, b, c, 0, 12); |
157 | G1(c, d, A, b, 9, 15); |
158 | G1(b, c, d, A, 5, 9); |
159 | G1(A, b, c, d, 2, 11); |
160 | G1(d, A, b, c, 14, 7); |
161 | G1(c, d, A, b, 11, 13); |
162 | G1(b, c, d, A, 8, 12); |
163 | |
164 | G2(a, B, C, D, 6, 9); |
165 | G2(D, a, B, C, 11, 13); |
166 | G2(C, D, a, B, 3, 15); |
167 | G2(B, C, D, a, 7, 7); |
168 | G2(a, B, C, D, 0, 12); |
169 | G2(D, a, B, C, 13, 8); |
170 | G2(C, D, a, B, 5, 9); |
171 | G2(B, C, D, a, 10, 11); |
172 | G2(a, B, C, D, 14, 7); |
173 | G2(D, a, B, C, 15, 7); |
174 | G2(C, D, a, B, 8, 12); |
175 | G2(B, C, D, a, 12, 7); |
176 | G2(a, B, C, D, 4, 6); |
177 | G2(D, a, B, C, 9, 15); |
178 | G2(C, D, a, B, 1, 13); |
179 | G2(B, C, D, a, 2, 11); |
180 | |
181 | H1(A, B, c, d, 3, 11); |
182 | H1(d, A, B, c, 10, 13); |
183 | H1(c, d, A, B, 14, 6); |
184 | H1(B, c, d, A, 4, 7); |
185 | H1(A, B, c, d, 9, 14); |
186 | H1(d, A, B, c, 15, 9); |
187 | H1(c, d, A, B, 8, 13); |
188 | H1(B, c, d, A, 1, 15); |
189 | H1(A, B, c, d, 2, 14); |
190 | H1(d, A, B, c, 7, 8); |
191 | H1(c, d, A, B, 0, 13); |
192 | H1(B, c, d, A, 6, 6); |
193 | H1(A, B, c, d, 13, 5); |
194 | H1(d, A, B, c, 11, 12); |
195 | H1(c, d, A, B, 5, 7); |
196 | H1(B, c, d, A, 12, 5); |
197 | |
198 | H2(a, b, C, D, 15, 9); |
199 | H2(D, a, b, C, 5, 7); |
200 | H2(C, D, a, b, 1, 15); |
201 | H2(b, C, D, a, 3, 11); |
202 | H2(a, b, C, D, 7, 8); |
203 | H2(D, a, b, C, 14, 6); |
204 | H2(C, D, a, b, 6, 6); |
205 | H2(b, C, D, a, 9, 14); |
206 | H2(a, b, C, D, 11, 12); |
207 | H2(D, a, b, C, 8, 13); |
208 | H2(C, D, a, b, 12, 5); |
209 | H2(b, C, D, a, 2, 14); |
210 | H2(a, b, C, D, 10, 13); |
211 | H2(D, a, b, C, 0, 13); |
212 | H2(C, D, a, b, 4, 7); |
213 | H2(b, C, D, a, 13, 5); |
214 | |
215 | I1(A, B, C, d, 1, 11); |
216 | I1(d, A, B, C, 9, 12); |
217 | I1(C, d, A, B, 11, 14); |
218 | I1(B, C, d, A, 10, 15); |
219 | I1(A, B, C, d, 0, 14); |
220 | I1(d, A, B, C, 8, 15); |
221 | I1(C, d, A, B, 12, 9); |
222 | I1(B, C, d, A, 4, 8); |
223 | I1(A, B, C, d, 13, 9); |
224 | I1(d, A, B, C, 3, 14); |
225 | I1(C, d, A, B, 7, 5); |
226 | I1(B, C, d, A, 15, 6); |
227 | I1(A, B, C, d, 14, 8); |
228 | I1(d, A, B, C, 5, 6); |
229 | I1(C, d, A, B, 6, 5); |
230 | I1(B, C, d, A, 2, 12); |
231 | |
232 | I2(a, b, c, D, 8, 15); |
233 | I2(D, a, b, c, 6, 5); |
234 | I2(c, D, a, b, 4, 8); |
235 | I2(b, c, D, a, 1, 11); |
236 | I2(a, b, c, D, 3, 14); |
237 | I2(D, a, b, c, 11, 14); |
238 | I2(c, D, a, b, 15, 6); |
239 | I2(b, c, D, a, 0, 14); |
240 | I2(a, b, c, D, 5, 6); |
241 | I2(D, a, b, c, 12, 9); |
242 | I2(c, D, a, b, 2, 12); |
243 | I2(b, c, D, a, 13, 9); |
244 | I2(a, b, c, D, 9, 12); |
245 | I2(D, a, b, c, 7, 5); |
246 | I2(c, D, a, b, 10, 15); |
247 | I2(b, c, D, a, 14, 8); |
248 | |
249 | /* --- Recombine the two halves --- */ |
250 | |
251 | ctx->a += A; |
252 | ctx->b += B; |
253 | ctx->c += C; |
254 | ctx->d += D; |
255 | ctx->A += a; |
256 | ctx->B += b; |
257 | ctx->C += c; |
258 | ctx->D += d; |
259 | } |
260 | |
261 | /* --- @rmd256_init@ --- * |
262 | * |
263 | * Arguments: @rmd256_ctx *ctx@ = pointer to context block to initialize |
264 | * |
265 | * Returns: --- |
266 | * |
267 | * Use: Initializes a context block ready for hashing. |
268 | */ |
269 | |
270 | void rmd256_init(rmd256_ctx *ctx) |
271 | { |
272 | ctx->a = 0x67452301; |
273 | ctx->b = 0xefcdab89; |
274 | ctx->c = 0x98badcfe; |
275 | ctx->d = 0x10325476; |
276 | ctx->A = 0x76543210; |
277 | ctx->B = 0xfedcba98; |
278 | ctx->C = 0x89abcdef; |
279 | ctx->D = 0x01234567; |
280 | ctx->off = 0; |
281 | ctx->nl = ctx->nh = 0; |
282 | } |
283 | |
284 | /* --- @rmd256_set@ --- * |
285 | * |
286 | * Arguments: @rmd256_ctx *ctx@ = pointer to context block |
287 | * @const void *buf@ = pointer to state buffer |
288 | * @unsigned long count@ = current count of bytes processed |
289 | * |
290 | * Returns: --- |
291 | * |
292 | * Use: Initializes a context block from a given state. This is |
293 | * useful in cases where the initial hash state is meant to be |
294 | * secret, e.g., for NMAC and HMAC support. |
295 | */ |
296 | |
297 | void rmd256_set(rmd256_ctx *ctx, const void *buf, unsigned long count) |
298 | { |
299 | const octet *p = buf; |
300 | ctx->a = LOAD32_L(p + 0); |
301 | ctx->b = LOAD32_L(p + 4); |
302 | ctx->c = LOAD32_L(p + 8); |
303 | ctx->d = LOAD32_L(p + 12); |
304 | ctx->A = LOAD32_L(p + 16); |
305 | ctx->B = LOAD32_L(p + 20); |
306 | ctx->C = LOAD32_L(p + 24); |
307 | ctx->D = LOAD32_L(p + 28); |
308 | ctx->off = 0; |
309 | ctx->nl = U32(count); |
310 | ctx->nh = U32(((count & ~MASK32) >> 16) >> 16); |
311 | } |
312 | |
313 | /* --- @rmd256_hash@ --- * |
314 | * |
315 | * Arguments: @rmd256_ctx *ctx@ = pointer to context block |
316 | * @const void *buf@ = buffer of data to hash |
317 | * @size_t sz@ = size of buffer to hash |
318 | * |
319 | * Returns: --- |
320 | * |
321 | * Use: Hashes a buffer of data. The buffer may be of any size and |
322 | * alignment. |
323 | */ |
324 | |
325 | void rmd256_hash(rmd256_ctx *ctx, const void *buf, size_t sz) |
326 | { |
327 | HASH_BUFFER(RMD256, rmd256, ctx, buf, sz); |
328 | } |
329 | |
330 | /* --- @rmd256_done@ --- * |
331 | * |
332 | * Arguments: @rmd256_ctx *ctx@ = pointer to context block |
333 | * @void *hash@ = pointer to output buffer |
334 | * |
335 | * Returns: --- |
336 | * |
337 | * Use: Returns the hash of the data read so far. |
338 | */ |
339 | |
340 | void rmd256_done(rmd256_ctx *ctx, void *hash) |
341 | { |
342 | octet *p = hash; |
343 | HASH_MD5STRENGTH(RMD256, rmd256, ctx); |
344 | STORE32_L(p + 0, ctx->a); |
345 | STORE32_L(p + 4, ctx->b); |
346 | STORE32_L(p + 8, ctx->c); |
347 | STORE32_L(p + 12, ctx->d); |
348 | STORE32_L(p + 16, ctx->A); |
349 | STORE32_L(p + 20, ctx->B); |
350 | STORE32_L(p + 24, ctx->C); |
351 | STORE32_L(p + 28, ctx->D); |
352 | } |
353 | |
354 | /* --- @rmd256_state@ --- * |
355 | * |
356 | * Arguments: @rmd256_ctx *ctx@ = pointer to context |
357 | * @void *state@ = pointer to buffer for current state |
358 | * |
359 | * Returns: Number of bytes written to the hash function so far. |
360 | * |
361 | * Use: Returns the current state of the hash function such that |
362 | * it can be passed to @rmd256_set@. |
363 | */ |
364 | |
365 | unsigned long rmd256_state(rmd256_ctx *ctx, void *state) |
366 | { |
367 | octet *p = state; |
368 | STORE32_L(p + 0, ctx->a); |
369 | STORE32_L(p + 4, ctx->b); |
370 | STORE32_L(p + 8, ctx->c); |
371 | STORE32_L(p + 12, ctx->d); |
372 | STORE32_L(p + 16, ctx->A); |
373 | STORE32_L(p + 20, ctx->B); |
374 | STORE32_L(p + 24, ctx->C); |
375 | STORE32_L(p + 28, ctx->D); |
376 | return (ctx->nl | ((ctx->nh << 16) << 16)); |
377 | } |
378 | |
379 | /* --- Generic interface --- */ |
380 | |
381 | GHASH_DEF(RMD256, rmd256) |
382 | |
383 | /* --- Test code --- */ |
384 | |
385 | HASH_TEST(RMD256, rmd256) |
386 | |
387 | /*----- That's all, folks -------------------------------------------------*/ |