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1c64c8e2 | 1 | /* -*-c-*- |
1c64c8e2 | 2 | * |
3 | * The RIPEMD-128 message digest function | |
4 | * | |
5 | * (c) 1998 Straylight/Edgeware | |
6 | */ | |
7 | ||
45c0fd36 | 8 | /*----- Licensing notice --------------------------------------------------* |
1c64c8e2 | 9 | * |
10 | * This file is part of Catacomb. | |
11 | * | |
12 | * Catacomb is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU Library General Public License as | |
14 | * published by the Free Software Foundation; either version 2 of the | |
15 | * License, or (at your option) any later version. | |
45c0fd36 | 16 | * |
1c64c8e2 | 17 | * Catacomb is distributed in the hope that it will be useful, |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU Library General Public License for more details. | |
45c0fd36 | 21 | * |
1c64c8e2 | 22 | * You should have received a copy of the GNU Library General Public |
23 | * License along with Catacomb; if not, write to the Free | |
24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
25 | * MA 02111-1307, USA. | |
26 | */ | |
27 | ||
1c64c8e2 | 28 | /*----- Header files ------------------------------------------------------*/ |
29 | ||
30 | #include <mLib/bits.h> | |
31 | ||
32 | #include "ghash.h" | |
33 | #include "ghash-def.h" | |
34 | #include "hash.h" | |
35 | #include "rmd128.h" | |
36 | ||
37 | /*----- Main code ---------------------------------------------------------*/ | |
38 | ||
39 | /* --- @rmd128_compress@ --- * | |
40 | * | |
41 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block | |
42 | * @const void *sbuf@ = pointer to buffer of appropriate size | |
43 | * | |
44 | * Returns: --- | |
45 | * | |
46 | * Use: RIPEMD-128 compression function. | |
47 | */ | |
48 | ||
49 | void rmd128_compress(rmd128_ctx *ctx, const void *sbuf) | |
50 | { | |
51 | uint32 a, b, c, d; | |
52 | uint32 A, B, C, D; | |
53 | uint32 buf[16]; | |
54 | ||
55 | /* --- Fetch the chaining variables --- */ | |
56 | ||
57 | a = A = ctx->a; | |
58 | b = B = ctx->b; | |
59 | c = C = ctx->c; | |
60 | d = D = ctx->d; | |
61 | ||
62 | /* --- Fetch the buffer contents --- */ | |
63 | ||
64 | { | |
65 | int i; | |
66 | const octet *p; | |
67 | ||
68 | for (i = 0, p = sbuf; i < 16; i++, p += 4) | |
69 | buf[i] = LOAD32_L(p); | |
70 | } | |
71 | ||
72 | /* --- Definitions for round functions --- */ | |
73 | ||
74 | #define F(x, y, z) ((x) ^ (y) ^ (z)) | |
75 | #define G(x, y, z) (((x) & (y)) | (~(x) & (z))) | |
76 | #define H(x, y, z) (((x) | ~(y)) ^ (z)) | |
77 | #define I(x, y, z) (((x) & (z)) | ((y) & ~(z))) | |
78 | ||
79 | #define T(w, x, y, z, i, r, f, k) do { \ | |
80 | uint32 _t = w + f(x, y, z) + buf[i] + k; \ | |
81 | w = ROL32(_t, r); \ | |
82 | } while (0) | |
83 | ||
84 | #define F1(w, x, y, z, i, r) T(w, x, y, z, i, r, F, 0x00000000) | |
85 | #define G1(w, x, y, z, i, r) T(w, x, y, z, i, r, G, 0x5a827999) | |
86 | #define H1(w, x, y, z, i, r) T(w, x, y, z, i, r, H, 0x6ed9eba1) | |
87 | #define I1(w, x, y, z, i, r) T(w, x, y, z, i, r, I, 0x8f1bbcdc) | |
45c0fd36 | 88 | |
1c64c8e2 | 89 | #define F2(w, x, y, z, i, r) T(w, x, y, z, i, r, I, 0x50a28be6) |
90 | #define G2(w, x, y, z, i, r) T(w, x, y, z, i, r, H, 0x5c4dd124) | |
91 | #define H2(w, x, y, z, i, r) T(w, x, y, z, i, r, G, 0x6d703ef3) | |
92 | #define I2(w, x, y, z, i, r) T(w, x, y, z, i, r, F, 0x00000000) | |
93 | ||
94 | /* --- First the left hand side --- */ | |
95 | ||
96 | F1(a, b, c, d, 0, 11); | |
97 | F1(d, a, b, c, 1, 14); | |
98 | F1(c, d, a, b, 2, 15); | |
99 | F1(b, c, d, a, 3, 12); | |
100 | F1(a, b, c, d, 4, 5); | |
101 | F1(d, a, b, c, 5, 8); | |
102 | F1(c, d, a, b, 6, 7); | |
103 | F1(b, c, d, a, 7, 9); | |
104 | F1(a, b, c, d, 8, 11); | |
105 | F1(d, a, b, c, 9, 13); | |
106 | F1(c, d, a, b, 10, 14); | |
107 | F1(b, c, d, a, 11, 15); | |
108 | F1(a, b, c, d, 12, 6); | |
109 | F1(d, a, b, c, 13, 7); | |
110 | F1(c, d, a, b, 14, 9); | |
111 | F1(b, c, d, a, 15, 8); | |
112 | ||
113 | G1(a, b, c, d, 7, 7); | |
114 | G1(d, a, b, c, 4, 6); | |
115 | G1(c, d, a, b, 13, 8); | |
116 | G1(b, c, d, a, 1, 13); | |
117 | G1(a, b, c, d, 10, 11); | |
118 | G1(d, a, b, c, 6, 9); | |
119 | G1(c, d, a, b, 15, 7); | |
120 | G1(b, c, d, a, 3, 15); | |
121 | G1(a, b, c, d, 12, 7); | |
122 | G1(d, a, b, c, 0, 12); | |
123 | G1(c, d, a, b, 9, 15); | |
124 | G1(b, c, d, a, 5, 9); | |
125 | G1(a, b, c, d, 2, 11); | |
126 | G1(d, a, b, c, 14, 7); | |
127 | G1(c, d, a, b, 11, 13); | |
128 | G1(b, c, d, a, 8, 12); | |
129 | ||
130 | H1(a, b, c, d, 3, 11); | |
131 | H1(d, a, b, c, 10, 13); | |
132 | H1(c, d, a, b, 14, 6); | |
133 | H1(b, c, d, a, 4, 7); | |
134 | H1(a, b, c, d, 9, 14); | |
135 | H1(d, a, b, c, 15, 9); | |
136 | H1(c, d, a, b, 8, 13); | |
137 | H1(b, c, d, a, 1, 15); | |
138 | H1(a, b, c, d, 2, 14); | |
139 | H1(d, a, b, c, 7, 8); | |
140 | H1(c, d, a, b, 0, 13); | |
141 | H1(b, c, d, a, 6, 6); | |
142 | H1(a, b, c, d, 13, 5); | |
143 | H1(d, a, b, c, 11, 12); | |
144 | H1(c, d, a, b, 5, 7); | |
145 | H1(b, c, d, a, 12, 5); | |
146 | ||
147 | I1(a, b, c, d, 1, 11); | |
148 | I1(d, a, b, c, 9, 12); | |
149 | I1(c, d, a, b, 11, 14); | |
150 | I1(b, c, d, a, 10, 15); | |
151 | I1(a, b, c, d, 0, 14); | |
152 | I1(d, a, b, c, 8, 15); | |
153 | I1(c, d, a, b, 12, 9); | |
154 | I1(b, c, d, a, 4, 8); | |
155 | I1(a, b, c, d, 13, 9); | |
156 | I1(d, a, b, c, 3, 14); | |
157 | I1(c, d, a, b, 7, 5); | |
158 | I1(b, c, d, a, 15, 6); | |
159 | I1(a, b, c, d, 14, 8); | |
160 | I1(d, a, b, c, 5, 6); | |
161 | I1(c, d, a, b, 6, 5); | |
162 | I1(b, c, d, a, 2, 12); | |
45c0fd36 | 163 | |
1c64c8e2 | 164 | /* --- And then the right hand side --- */ |
165 | ||
166 | F2(A, B, C, D, 5, 8); | |
167 | F2(D, A, B, C, 14, 9); | |
168 | F2(C, D, A, B, 7, 9); | |
169 | F2(B, C, D, A, 0, 11); | |
170 | F2(A, B, C, D, 9, 13); | |
171 | F2(D, A, B, C, 2, 15); | |
172 | F2(C, D, A, B, 11, 15); | |
173 | F2(B, C, D, A, 4, 5); | |
174 | F2(A, B, C, D, 13, 7); | |
175 | F2(D, A, B, C, 6, 7); | |
176 | F2(C, D, A, B, 15, 8); | |
177 | F2(B, C, D, A, 8, 11); | |
178 | F2(A, B, C, D, 1, 14); | |
179 | F2(D, A, B, C, 10, 14); | |
180 | F2(C, D, A, B, 3, 12); | |
181 | F2(B, C, D, A, 12, 6); | |
182 | ||
183 | G2(A, B, C, D, 6, 9); | |
184 | G2(D, A, B, C, 11, 13); | |
185 | G2(C, D, A, B, 3, 15); | |
186 | G2(B, C, D, A, 7, 7); | |
187 | G2(A, B, C, D, 0, 12); | |
188 | G2(D, A, B, C, 13, 8); | |
189 | G2(C, D, A, B, 5, 9); | |
190 | G2(B, C, D, A, 10, 11); | |
191 | G2(A, B, C, D, 14, 7); | |
192 | G2(D, A, B, C, 15, 7); | |
193 | G2(C, D, A, B, 8, 12); | |
194 | G2(B, C, D, A, 12, 7); | |
195 | G2(A, B, C, D, 4, 6); | |
196 | G2(D, A, B, C, 9, 15); | |
197 | G2(C, D, A, B, 1, 13); | |
198 | G2(B, C, D, A, 2, 11); | |
199 | ||
200 | H2(A, B, C, D, 15, 9); | |
201 | H2(D, A, B, C, 5, 7); | |
202 | H2(C, D, A, B, 1, 15); | |
203 | H2(B, C, D, A, 3, 11); | |
204 | H2(A, B, C, D, 7, 8); | |
205 | H2(D, A, B, C, 14, 6); | |
206 | H2(C, D, A, B, 6, 6); | |
207 | H2(B, C, D, A, 9, 14); | |
208 | H2(A, B, C, D, 11, 12); | |
209 | H2(D, A, B, C, 8, 13); | |
210 | H2(C, D, A, B, 12, 5); | |
211 | H2(B, C, D, A, 2, 14); | |
212 | H2(A, B, C, D, 10, 13); | |
213 | H2(D, A, B, C, 0, 13); | |
214 | H2(C, D, A, B, 4, 7); | |
215 | H2(B, C, D, A, 13, 5); | |
216 | ||
217 | I2(A, B, C, D, 8, 15); | |
218 | I2(D, A, B, C, 6, 5); | |
219 | I2(C, D, A, B, 4, 8); | |
220 | I2(B, C, D, A, 1, 11); | |
221 | I2(A, B, C, D, 3, 14); | |
222 | I2(D, A, B, C, 11, 14); | |
223 | I2(C, D, A, B, 15, 6); | |
224 | I2(B, C, D, A, 0, 14); | |
225 | I2(A, B, C, D, 5, 6); | |
226 | I2(D, A, B, C, 12, 9); | |
227 | I2(C, D, A, B, 2, 12); | |
228 | I2(B, C, D, A, 13, 9); | |
229 | I2(A, B, C, D, 9, 12); | |
230 | I2(D, A, B, C, 7, 5); | |
231 | I2(C, D, A, B, 10, 15); | |
232 | I2(B, C, D, A, 14, 8); | |
45c0fd36 | 233 | |
1c64c8e2 | 234 | /* --- Recombine the two halves --- */ |
235 | ||
236 | { | |
237 | uint32 | |
238 | tmp = ctx->b + c + D; | |
239 | ctx->b = ctx->c + d + A; | |
240 | ctx->c = ctx->d + a + B; | |
241 | ctx->d = ctx->a + b + C; | |
242 | ctx->a = tmp; | |
243 | } | |
244 | } | |
245 | ||
246 | /* --- @rmd128_init@ --- * | |
247 | * | |
248 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block to initialize | |
249 | * | |
250 | * Returns: --- | |
251 | * | |
252 | * Use: Initializes a context block ready for hashing. | |
253 | */ | |
254 | ||
255 | void rmd128_init(rmd128_ctx *ctx) | |
256 | { | |
257 | ctx->a = 0x67452301; | |
258 | ctx->b = 0xefcdab89; | |
259 | ctx->c = 0x98badcfe; | |
260 | ctx->d = 0x10325476; | |
261 | ctx->off = 0; | |
262 | ctx->nl = ctx->nh = 0; | |
263 | } | |
264 | ||
265 | /* --- @rmd128_set@ --- * | |
266 | * | |
267 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block | |
268 | * @const void *buf@ = pointer to state buffer | |
269 | * @unsigned long count@ = current count of bytes processed | |
270 | * | |
271 | * Returns: --- | |
272 | * | |
273 | * Use: Initializes a context block from a given state. This is | |
274 | * useful in cases where the initial hash state is meant to be | |
275 | * secret, e.g., for NMAC and HMAC support. | |
276 | */ | |
277 | ||
278 | void rmd128_set(rmd128_ctx *ctx, const void *buf, unsigned long count) | |
279 | { | |
280 | const octet *p = buf; | |
45c0fd36 MW |
281 | ctx->a = LOAD32_L(p + 0); |
282 | ctx->b = LOAD32_L(p + 4); | |
283 | ctx->c = LOAD32_L(p + 8); | |
1c64c8e2 | 284 | ctx->d = LOAD32_L(p + 12); |
285 | ctx->off = 0; | |
286 | ctx->nl = U32(count); | |
e91d142c | 287 | ctx->nh = U32(((count & ~(unsigned long)MASK32) >> 16) >> 16); |
1c64c8e2 | 288 | } |
289 | ||
290 | /* --- @rmd128_hash@ --- * | |
291 | * | |
292 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block | |
293 | * @const void *buf@ = buffer of data to hash | |
294 | * @size_t sz@ = size of buffer to hash | |
295 | * | |
296 | * Returns: --- | |
297 | * | |
298 | * Use: Hashes a buffer of data. The buffer may be of any size and | |
299 | * alignment. | |
300 | */ | |
301 | ||
302 | void rmd128_hash(rmd128_ctx *ctx, const void *buf, size_t sz) | |
303 | { | |
304 | HASH_BUFFER(RMD128, rmd128, ctx, buf, sz); | |
305 | } | |
306 | ||
307 | /* --- @rmd128_done@ --- * | |
308 | * | |
309 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block | |
310 | * @void *hash@ = pointer to output buffer | |
311 | * | |
312 | * Returns: --- | |
313 | * | |
314 | * Use: Returns the hash of the data read so far. | |
315 | */ | |
316 | ||
317 | void rmd128_done(rmd128_ctx *ctx, void *hash) | |
318 | { | |
319 | octet *p = hash; | |
320 | HASH_MD5STRENGTH(RMD128, rmd128, ctx); | |
45c0fd36 MW |
321 | STORE32_L(p + 0, ctx->a); |
322 | STORE32_L(p + 4, ctx->b); | |
323 | STORE32_L(p + 8, ctx->c); | |
1c64c8e2 | 324 | STORE32_L(p + 12, ctx->d); |
325 | } | |
326 | ||
327 | /* --- @rmd128_state@ --- * | |
328 | * | |
329 | * Arguments: @rmd128_ctx *ctx@ = pointer to context | |
330 | * @void *state@ = pointer to buffer for current state | |
331 | * | |
332 | * Returns: Number of bytes written to the hash function so far. | |
333 | * | |
334 | * Use: Returns the current state of the hash function such that | |
335 | * it can be passed to @rmd128_set@. | |
336 | */ | |
337 | ||
338 | unsigned long rmd128_state(rmd128_ctx *ctx, void *state) | |
339 | { | |
340 | octet *p = state; | |
45c0fd36 MW |
341 | STORE32_L(p + 0, ctx->a); |
342 | STORE32_L(p + 4, ctx->b); | |
343 | STORE32_L(p + 8, ctx->c); | |
1c64c8e2 | 344 | STORE32_L(p + 12, ctx->d); |
345 | return (ctx->nl | ((ctx->nh << 16) << 16)); | |
346 | } | |
347 | ||
348 | /* --- Generic interface --- */ | |
349 | ||
350 | GHASH_DEF(RMD128, rmd128) | |
351 | ||
352 | /* --- Test code --- */ | |
353 | ||
354 | HASH_TEST(RMD128, rmd128) | |
355 | ||
356 | /*----- That's all, folks -------------------------------------------------*/ |