3 * $Id: rmd128.c,v 1.2 2004/04/08 01:36:15 mdw Exp $
5 * The RIPEMD-128 message digest function
7 * (c) 1998 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
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.
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.
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,
30 /*----- Header files ------------------------------------------------------*/
32 #include <mLib/bits.h>
35 #include "ghash-def.h"
39 /*----- Main code ---------------------------------------------------------*/
41 /* --- @rmd128_compress@ --- *
43 * Arguments: @rmd128_ctx *ctx@ = pointer to context block
44 * @const void *sbuf@ = pointer to buffer of appropriate size
48 * Use: RIPEMD-128 compression function.
51 void rmd128_compress(rmd128_ctx
*ctx
, const void *sbuf
)
57 /* --- Fetch the chaining variables --- */
64 /* --- Fetch the buffer contents --- */
70 for (i
= 0, p
= sbuf
; i
< 16; i
++, p
+= 4)
74 /* --- Definitions for round functions --- */
76 #define F(x, y, z) ((x) ^ (y) ^ (z))
77 #define G(x, y, z) (((x) & (y)) | (~(x) & (z)))
78 #define H(x, y, z) (((x) | ~(y)) ^ (z))
79 #define I(x, y, z) (((x) & (z)) | ((y) & ~(z)))
81 #define T(w, x, y, z, i, r, f, k) do { \
82 uint32 _t = w + f(x, y, z) + buf[i] + k; \
86 #define F1(w, x, y, z, i, r) T(w, x, y, z, i, r, F, 0x00000000)
87 #define G1(w, x, y, z, i, r) T(w, x, y, z, i, r, G, 0x5a827999)
88 #define H1(w, x, y, z, i, r) T(w, x, y, z, i, r, H, 0x6ed9eba1)
89 #define I1(w, x, y, z, i, r) T(w, x, y, z, i, r, I, 0x8f1bbcdc)
91 #define F2(w, x, y, z, i, r) T(w, x, y, z, i, r, I, 0x50a28be6)
92 #define G2(w, x, y, z, i, r) T(w, x, y, z, i, r, H, 0x5c4dd124)
93 #define H2(w, x, y, z, i, r) T(w, x, y, z, i, r, G, 0x6d703ef3)
94 #define I2(w, x, y, z, i, r) T(w, x, y, z, i, r, F, 0x00000000)
96 /* --- First the left hand side --- */
98 F1(a
, b
, c
, d
, 0, 11);
99 F1(d
, a
, b
, c
, 1, 14);
100 F1(c
, d
, a
, b
, 2, 15);
101 F1(b
, c
, d
, a
, 3, 12);
102 F1(a
, b
, c
, d
, 4, 5);
103 F1(d
, a
, b
, c
, 5, 8);
104 F1(c
, d
, a
, b
, 6, 7);
105 F1(b
, c
, d
, a
, 7, 9);
106 F1(a
, b
, c
, d
, 8, 11);
107 F1(d
, a
, b
, c
, 9, 13);
108 F1(c
, d
, a
, b
, 10, 14);
109 F1(b
, c
, d
, a
, 11, 15);
110 F1(a
, b
, c
, d
, 12, 6);
111 F1(d
, a
, b
, c
, 13, 7);
112 F1(c
, d
, a
, b
, 14, 9);
113 F1(b
, c
, d
, a
, 15, 8);
115 G1(a
, b
, c
, d
, 7, 7);
116 G1(d
, a
, b
, c
, 4, 6);
117 G1(c
, d
, a
, b
, 13, 8);
118 G1(b
, c
, d
, a
, 1, 13);
119 G1(a
, b
, c
, d
, 10, 11);
120 G1(d
, a
, b
, c
, 6, 9);
121 G1(c
, d
, a
, b
, 15, 7);
122 G1(b
, c
, d
, a
, 3, 15);
123 G1(a
, b
, c
, d
, 12, 7);
124 G1(d
, a
, b
, c
, 0, 12);
125 G1(c
, d
, a
, b
, 9, 15);
126 G1(b
, c
, d
, a
, 5, 9);
127 G1(a
, b
, c
, d
, 2, 11);
128 G1(d
, a
, b
, c
, 14, 7);
129 G1(c
, d
, a
, b
, 11, 13);
130 G1(b
, c
, d
, a
, 8, 12);
132 H1(a
, b
, c
, d
, 3, 11);
133 H1(d
, a
, b
, c
, 10, 13);
134 H1(c
, d
, a
, b
, 14, 6);
135 H1(b
, c
, d
, a
, 4, 7);
136 H1(a
, b
, c
, d
, 9, 14);
137 H1(d
, a
, b
, c
, 15, 9);
138 H1(c
, d
, a
, b
, 8, 13);
139 H1(b
, c
, d
, a
, 1, 15);
140 H1(a
, b
, c
, d
, 2, 14);
141 H1(d
, a
, b
, c
, 7, 8);
142 H1(c
, d
, a
, b
, 0, 13);
143 H1(b
, c
, d
, a
, 6, 6);
144 H1(a
, b
, c
, d
, 13, 5);
145 H1(d
, a
, b
, c
, 11, 12);
146 H1(c
, d
, a
, b
, 5, 7);
147 H1(b
, c
, d
, a
, 12, 5);
149 I1(a
, b
, c
, d
, 1, 11);
150 I1(d
, a
, b
, c
, 9, 12);
151 I1(c
, d
, a
, b
, 11, 14);
152 I1(b
, c
, d
, a
, 10, 15);
153 I1(a
, b
, c
, d
, 0, 14);
154 I1(d
, a
, b
, c
, 8, 15);
155 I1(c
, d
, a
, b
, 12, 9);
156 I1(b
, c
, d
, a
, 4, 8);
157 I1(a
, b
, c
, d
, 13, 9);
158 I1(d
, a
, b
, c
, 3, 14);
159 I1(c
, d
, a
, b
, 7, 5);
160 I1(b
, c
, d
, a
, 15, 6);
161 I1(a
, b
, c
, d
, 14, 8);
162 I1(d
, a
, b
, c
, 5, 6);
163 I1(c
, d
, a
, b
, 6, 5);
164 I1(b
, c
, d
, a
, 2, 12);
166 /* --- And then the right hand side --- */
168 F2(A
, B
, C
, D
, 5, 8);
169 F2(D
, A
, B
, C
, 14, 9);
170 F2(C
, D
, A
, B
, 7, 9);
171 F2(B
, C
, D
, A
, 0, 11);
172 F2(A
, B
, C
, D
, 9, 13);
173 F2(D
, A
, B
, C
, 2, 15);
174 F2(C
, D
, A
, B
, 11, 15);
175 F2(B
, C
, D
, A
, 4, 5);
176 F2(A
, B
, C
, D
, 13, 7);
177 F2(D
, A
, B
, C
, 6, 7);
178 F2(C
, D
, A
, B
, 15, 8);
179 F2(B
, C
, D
, A
, 8, 11);
180 F2(A
, B
, C
, D
, 1, 14);
181 F2(D
, A
, B
, C
, 10, 14);
182 F2(C
, D
, A
, B
, 3, 12);
183 F2(B
, C
, D
, A
, 12, 6);
185 G2(A
, B
, C
, D
, 6, 9);
186 G2(D
, A
, B
, C
, 11, 13);
187 G2(C
, D
, A
, B
, 3, 15);
188 G2(B
, C
, D
, A
, 7, 7);
189 G2(A
, B
, C
, D
, 0, 12);
190 G2(D
, A
, B
, C
, 13, 8);
191 G2(C
, D
, A
, B
, 5, 9);
192 G2(B
, C
, D
, A
, 10, 11);
193 G2(A
, B
, C
, D
, 14, 7);
194 G2(D
, A
, B
, C
, 15, 7);
195 G2(C
, D
, A
, B
, 8, 12);
196 G2(B
, C
, D
, A
, 12, 7);
197 G2(A
, B
, C
, D
, 4, 6);
198 G2(D
, A
, B
, C
, 9, 15);
199 G2(C
, D
, A
, B
, 1, 13);
200 G2(B
, C
, D
, A
, 2, 11);
202 H2(A
, B
, C
, D
, 15, 9);
203 H2(D
, A
, B
, C
, 5, 7);
204 H2(C
, D
, A
, B
, 1, 15);
205 H2(B
, C
, D
, A
, 3, 11);
206 H2(A
, B
, C
, D
, 7, 8);
207 H2(D
, A
, B
, C
, 14, 6);
208 H2(C
, D
, A
, B
, 6, 6);
209 H2(B
, C
, D
, A
, 9, 14);
210 H2(A
, B
, C
, D
, 11, 12);
211 H2(D
, A
, B
, C
, 8, 13);
212 H2(C
, D
, A
, B
, 12, 5);
213 H2(B
, C
, D
, A
, 2, 14);
214 H2(A
, B
, C
, D
, 10, 13);
215 H2(D
, A
, B
, C
, 0, 13);
216 H2(C
, D
, A
, B
, 4, 7);
217 H2(B
, C
, D
, A
, 13, 5);
219 I2(A
, B
, C
, D
, 8, 15);
220 I2(D
, A
, B
, C
, 6, 5);
221 I2(C
, D
, A
, B
, 4, 8);
222 I2(B
, C
, D
, A
, 1, 11);
223 I2(A
, B
, C
, D
, 3, 14);
224 I2(D
, A
, B
, C
, 11, 14);
225 I2(C
, D
, A
, B
, 15, 6);
226 I2(B
, C
, D
, A
, 0, 14);
227 I2(A
, B
, C
, D
, 5, 6);
228 I2(D
, A
, B
, C
, 12, 9);
229 I2(C
, D
, A
, B
, 2, 12);
230 I2(B
, C
, D
, A
, 13, 9);
231 I2(A
, B
, C
, D
, 9, 12);
232 I2(D
, A
, B
, C
, 7, 5);
233 I2(C
, D
, A
, B
, 10, 15);
234 I2(B
, C
, D
, A
, 14, 8);
236 /* --- Recombine the two halves --- */
240 tmp
= ctx
->b
+ c
+ D
;
241 ctx
->b
= ctx
->c
+ d
+ A
;
242 ctx
->c
= ctx
->d
+ a
+ B
;
243 ctx
->d
= ctx
->a
+ b
+ C
;
248 /* --- @rmd128_init@ --- *
250 * Arguments: @rmd128_ctx *ctx@ = pointer to context block to initialize
254 * Use: Initializes a context block ready for hashing.
257 void rmd128_init(rmd128_ctx
*ctx
)
264 ctx
->nl
= ctx
->nh
= 0;
267 /* --- @rmd128_set@ --- *
269 * Arguments: @rmd128_ctx *ctx@ = pointer to context block
270 * @const void *buf@ = pointer to state buffer
271 * @unsigned long count@ = current count of bytes processed
275 * Use: Initializes a context block from a given state. This is
276 * useful in cases where the initial hash state is meant to be
277 * secret, e.g., for NMAC and HMAC support.
280 void rmd128_set(rmd128_ctx
*ctx
, const void *buf
, unsigned long count
)
282 const octet
*p
= buf
;
283 ctx
->a
= LOAD32_L(p
+ 0);
284 ctx
->b
= LOAD32_L(p
+ 4);
285 ctx
->c
= LOAD32_L(p
+ 8);
286 ctx
->d
= LOAD32_L(p
+ 12);
288 ctx
->nl
= U32(count
);
289 ctx
->nh
= U32(((count
& ~MASK32
) >> 16) >> 16);
292 /* --- @rmd128_hash@ --- *
294 * Arguments: @rmd128_ctx *ctx@ = pointer to context block
295 * @const void *buf@ = buffer of data to hash
296 * @size_t sz@ = size of buffer to hash
300 * Use: Hashes a buffer of data. The buffer may be of any size and
304 void rmd128_hash(rmd128_ctx
*ctx
, const void *buf
, size_t sz
)
306 HASH_BUFFER(RMD128
, rmd128
, ctx
, buf
, sz
);
309 /* --- @rmd128_done@ --- *
311 * Arguments: @rmd128_ctx *ctx@ = pointer to context block
312 * @void *hash@ = pointer to output buffer
316 * Use: Returns the hash of the data read so far.
319 void rmd128_done(rmd128_ctx
*ctx
, void *hash
)
322 HASH_MD5STRENGTH(RMD128
, rmd128
, ctx
);
323 STORE32_L(p
+ 0, ctx
->a
);
324 STORE32_L(p
+ 4, ctx
->b
);
325 STORE32_L(p
+ 8, ctx
->c
);
326 STORE32_L(p
+ 12, ctx
->d
);
329 /* --- @rmd128_state@ --- *
331 * Arguments: @rmd128_ctx *ctx@ = pointer to context
332 * @void *state@ = pointer to buffer for current state
334 * Returns: Number of bytes written to the hash function so far.
336 * Use: Returns the current state of the hash function such that
337 * it can be passed to @rmd128_set@.
340 unsigned long rmd128_state(rmd128_ctx
*ctx
, void *state
)
343 STORE32_L(p
+ 0, ctx
->a
);
344 STORE32_L(p
+ 4, ctx
->b
);
345 STORE32_L(p
+ 8, ctx
->c
);
346 STORE32_L(p
+ 12, ctx
->d
);
347 return (ctx
->nl
| ((ctx
->nh
<< 16) << 16));
350 /* --- Generic interface --- */
352 GHASH_DEF(RMD128
, rmd128
)
354 /* --- Test code --- */
356 HASH_TEST(RMD128
, rmd128
)
358 /*----- That's all, folks -------------------------------------------------*/