4 * RIPEMD-256 - RACE Integrity Primitives Evaluation Message Digest.
6 * Based on the reference implementation by Antoon Bosselaers, ESAT-COSIC
8 * Copyright (c) 2008 Adrian-Ken Rueegsegger <ken@codelabs.ch>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the Free
12 * Software Foundation; either version 2 of the License, or (at your option)
16 #include <crypto/internal/hash.h>
17 #include <linux/init.h>
18 #include <linux/module.h>
20 #include <linux/types.h>
21 #include <asm/byteorder.h>
40 #define F1(x, y, z) (x ^ y ^ z) /* XOR */
41 #define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */
42 #define F3(x, y, z) ((x | ~y) ^ z)
43 #define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */
45 #define ROUND(a, b, c, d, f, k, x, s) { \
46 (a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \
47 (a) = rol32((a), (s)); \
50 static void rmd256_transform(u32
*state
, const __le32
*in
)
52 u32 aa
, bb
, cc
, dd
, aaa
, bbb
, ccc
, ddd
, tmp
;
54 /* Initialize left lane */
60 /* Initialize right lane */
66 /* round 1: left lane */
67 ROUND(aa
, bb
, cc
, dd
, F1
, K1
, in
[0], 11);
68 ROUND(dd
, aa
, bb
, cc
, F1
, K1
, in
[1], 14);
69 ROUND(cc
, dd
, aa
, bb
, F1
, K1
, in
[2], 15);
70 ROUND(bb
, cc
, dd
, aa
, F1
, K1
, in
[3], 12);
71 ROUND(aa
, bb
, cc
, dd
, F1
, K1
, in
[4], 5);
72 ROUND(dd
, aa
, bb
, cc
, F1
, K1
, in
[5], 8);
73 ROUND(cc
, dd
, aa
, bb
, F1
, K1
, in
[6], 7);
74 ROUND(bb
, cc
, dd
, aa
, F1
, K1
, in
[7], 9);
75 ROUND(aa
, bb
, cc
, dd
, F1
, K1
, in
[8], 11);
76 ROUND(dd
, aa
, bb
, cc
, F1
, K1
, in
[9], 13);
77 ROUND(cc
, dd
, aa
, bb
, F1
, K1
, in
[10], 14);
78 ROUND(bb
, cc
, dd
, aa
, F1
, K1
, in
[11], 15);
79 ROUND(aa
, bb
, cc
, dd
, F1
, K1
, in
[12], 6);
80 ROUND(dd
, aa
, bb
, cc
, F1
, K1
, in
[13], 7);
81 ROUND(cc
, dd
, aa
, bb
, F1
, K1
, in
[14], 9);
82 ROUND(bb
, cc
, dd
, aa
, F1
, K1
, in
[15], 8);
84 /* round 1: right lane */
85 ROUND(aaa
, bbb
, ccc
, ddd
, F4
, KK1
, in
[5], 8);
86 ROUND(ddd
, aaa
, bbb
, ccc
, F4
, KK1
, in
[14], 9);
87 ROUND(ccc
, ddd
, aaa
, bbb
, F4
, KK1
, in
[7], 9);
88 ROUND(bbb
, ccc
, ddd
, aaa
, F4
, KK1
, in
[0], 11);
89 ROUND(aaa
, bbb
, ccc
, ddd
, F4
, KK1
, in
[9], 13);
90 ROUND(ddd
, aaa
, bbb
, ccc
, F4
, KK1
, in
[2], 15);
91 ROUND(ccc
, ddd
, aaa
, bbb
, F4
, KK1
, in
[11], 15);
92 ROUND(bbb
, ccc
, ddd
, aaa
, F4
, KK1
, in
[4], 5);
93 ROUND(aaa
, bbb
, ccc
, ddd
, F4
, KK1
, in
[13], 7);
94 ROUND(ddd
, aaa
, bbb
, ccc
, F4
, KK1
, in
[6], 7);
95 ROUND(ccc
, ddd
, aaa
, bbb
, F4
, KK1
, in
[15], 8);
96 ROUND(bbb
, ccc
, ddd
, aaa
, F4
, KK1
, in
[8], 11);
97 ROUND(aaa
, bbb
, ccc
, ddd
, F4
, KK1
, in
[1], 14);
98 ROUND(ddd
, aaa
, bbb
, ccc
, F4
, KK1
, in
[10], 14);
99 ROUND(ccc
, ddd
, aaa
, bbb
, F4
, KK1
, in
[3], 12);
100 ROUND(bbb
, ccc
, ddd
, aaa
, F4
, KK1
, in
[12], 6);
102 /* Swap contents of "a" registers */
103 tmp
= aa
; aa
= aaa
; aaa
= tmp
;
105 /* round 2: left lane */
106 ROUND(aa
, bb
, cc
, dd
, F2
, K2
, in
[7], 7);
107 ROUND(dd
, aa
, bb
, cc
, F2
, K2
, in
[4], 6);
108 ROUND(cc
, dd
, aa
, bb
, F2
, K2
, in
[13], 8);
109 ROUND(bb
, cc
, dd
, aa
, F2
, K2
, in
[1], 13);
110 ROUND(aa
, bb
, cc
, dd
, F2
, K2
, in
[10], 11);
111 ROUND(dd
, aa
, bb
, cc
, F2
, K2
, in
[6], 9);
112 ROUND(cc
, dd
, aa
, bb
, F2
, K2
, in
[15], 7);
113 ROUND(bb
, cc
, dd
, aa
, F2
, K2
, in
[3], 15);
114 ROUND(aa
, bb
, cc
, dd
, F2
, K2
, in
[12], 7);
115 ROUND(dd
, aa
, bb
, cc
, F2
, K2
, in
[0], 12);
116 ROUND(cc
, dd
, aa
, bb
, F2
, K2
, in
[9], 15);
117 ROUND(bb
, cc
, dd
, aa
, F2
, K2
, in
[5], 9);
118 ROUND(aa
, bb
, cc
, dd
, F2
, K2
, in
[2], 11);
119 ROUND(dd
, aa
, bb
, cc
, F2
, K2
, in
[14], 7);
120 ROUND(cc
, dd
, aa
, bb
, F2
, K2
, in
[11], 13);
121 ROUND(bb
, cc
, dd
, aa
, F2
, K2
, in
[8], 12);
123 /* round 2: right lane */
124 ROUND(aaa
, bbb
, ccc
, ddd
, F3
, KK2
, in
[6], 9);
125 ROUND(ddd
, aaa
, bbb
, ccc
, F3
, KK2
, in
[11], 13);
126 ROUND(ccc
, ddd
, aaa
, bbb
, F3
, KK2
, in
[3], 15);
127 ROUND(bbb
, ccc
, ddd
, aaa
, F3
, KK2
, in
[7], 7);
128 ROUND(aaa
, bbb
, ccc
, ddd
, F3
, KK2
, in
[0], 12);
129 ROUND(ddd
, aaa
, bbb
, ccc
, F3
, KK2
, in
[13], 8);
130 ROUND(ccc
, ddd
, aaa
, bbb
, F3
, KK2
, in
[5], 9);
131 ROUND(bbb
, ccc
, ddd
, aaa
, F3
, KK2
, in
[10], 11);
132 ROUND(aaa
, bbb
, ccc
, ddd
, F3
, KK2
, in
[14], 7);
133 ROUND(ddd
, aaa
, bbb
, ccc
, F3
, KK2
, in
[15], 7);
134 ROUND(ccc
, ddd
, aaa
, bbb
, F3
, KK2
, in
[8], 12);
135 ROUND(bbb
, ccc
, ddd
, aaa
, F3
, KK2
, in
[12], 7);
136 ROUND(aaa
, bbb
, ccc
, ddd
, F3
, KK2
, in
[4], 6);
137 ROUND(ddd
, aaa
, bbb
, ccc
, F3
, KK2
, in
[9], 15);
138 ROUND(ccc
, ddd
, aaa
, bbb
, F3
, KK2
, in
[1], 13);
139 ROUND(bbb
, ccc
, ddd
, aaa
, F3
, KK2
, in
[2], 11);
141 /* Swap contents of "b" registers */
142 tmp
= bb
; bb
= bbb
; bbb
= tmp
;
144 /* round 3: left lane */
145 ROUND(aa
, bb
, cc
, dd
, F3
, K3
, in
[3], 11);
146 ROUND(dd
, aa
, bb
, cc
, F3
, K3
, in
[10], 13);
147 ROUND(cc
, dd
, aa
, bb
, F3
, K3
, in
[14], 6);
148 ROUND(bb
, cc
, dd
, aa
, F3
, K3
, in
[4], 7);
149 ROUND(aa
, bb
, cc
, dd
, F3
, K3
, in
[9], 14);
150 ROUND(dd
, aa
, bb
, cc
, F3
, K3
, in
[15], 9);
151 ROUND(cc
, dd
, aa
, bb
, F3
, K3
, in
[8], 13);
152 ROUND(bb
, cc
, dd
, aa
, F3
, K3
, in
[1], 15);
153 ROUND(aa
, bb
, cc
, dd
, F3
, K3
, in
[2], 14);
154 ROUND(dd
, aa
, bb
, cc
, F3
, K3
, in
[7], 8);
155 ROUND(cc
, dd
, aa
, bb
, F3
, K3
, in
[0], 13);
156 ROUND(bb
, cc
, dd
, aa
, F3
, K3
, in
[6], 6);
157 ROUND(aa
, bb
, cc
, dd
, F3
, K3
, in
[13], 5);
158 ROUND(dd
, aa
, bb
, cc
, F3
, K3
, in
[11], 12);
159 ROUND(cc
, dd
, aa
, bb
, F3
, K3
, in
[5], 7);
160 ROUND(bb
, cc
, dd
, aa
, F3
, K3
, in
[12], 5);
162 /* round 3: right lane */
163 ROUND(aaa
, bbb
, ccc
, ddd
, F2
, KK3
, in
[15], 9);
164 ROUND(ddd
, aaa
, bbb
, ccc
, F2
, KK3
, in
[5], 7);
165 ROUND(ccc
, ddd
, aaa
, bbb
, F2
, KK3
, in
[1], 15);
166 ROUND(bbb
, ccc
, ddd
, aaa
, F2
, KK3
, in
[3], 11);
167 ROUND(aaa
, bbb
, ccc
, ddd
, F2
, KK3
, in
[7], 8);
168 ROUND(ddd
, aaa
, bbb
, ccc
, F2
, KK3
, in
[14], 6);
169 ROUND(ccc
, ddd
, aaa
, bbb
, F2
, KK3
, in
[6], 6);
170 ROUND(bbb
, ccc
, ddd
, aaa
, F2
, KK3
, in
[9], 14);
171 ROUND(aaa
, bbb
, ccc
, ddd
, F2
, KK3
, in
[11], 12);
172 ROUND(ddd
, aaa
, bbb
, ccc
, F2
, KK3
, in
[8], 13);
173 ROUND(ccc
, ddd
, aaa
, bbb
, F2
, KK3
, in
[12], 5);
174 ROUND(bbb
, ccc
, ddd
, aaa
, F2
, KK3
, in
[2], 14);
175 ROUND(aaa
, bbb
, ccc
, ddd
, F2
, KK3
, in
[10], 13);
176 ROUND(ddd
, aaa
, bbb
, ccc
, F2
, KK3
, in
[0], 13);
177 ROUND(ccc
, ddd
, aaa
, bbb
, F2
, KK3
, in
[4], 7);
178 ROUND(bbb
, ccc
, ddd
, aaa
, F2
, KK3
, in
[13], 5);
180 /* Swap contents of "c" registers */
181 tmp
= cc
; cc
= ccc
; ccc
= tmp
;
183 /* round 4: left lane */
184 ROUND(aa
, bb
, cc
, dd
, F4
, K4
, in
[1], 11);
185 ROUND(dd
, aa
, bb
, cc
, F4
, K4
, in
[9], 12);
186 ROUND(cc
, dd
, aa
, bb
, F4
, K4
, in
[11], 14);
187 ROUND(bb
, cc
, dd
, aa
, F4
, K4
, in
[10], 15);
188 ROUND(aa
, bb
, cc
, dd
, F4
, K4
, in
[0], 14);
189 ROUND(dd
, aa
, bb
, cc
, F4
, K4
, in
[8], 15);
190 ROUND(cc
, dd
, aa
, bb
, F4
, K4
, in
[12], 9);
191 ROUND(bb
, cc
, dd
, aa
, F4
, K4
, in
[4], 8);
192 ROUND(aa
, bb
, cc
, dd
, F4
, K4
, in
[13], 9);
193 ROUND(dd
, aa
, bb
, cc
, F4
, K4
, in
[3], 14);
194 ROUND(cc
, dd
, aa
, bb
, F4
, K4
, in
[7], 5);
195 ROUND(bb
, cc
, dd
, aa
, F4
, K4
, in
[15], 6);
196 ROUND(aa
, bb
, cc
, dd
, F4
, K4
, in
[14], 8);
197 ROUND(dd
, aa
, bb
, cc
, F4
, K4
, in
[5], 6);
198 ROUND(cc
, dd
, aa
, bb
, F4
, K4
, in
[6], 5);
199 ROUND(bb
, cc
, dd
, aa
, F4
, K4
, in
[2], 12);
201 /* round 4: right lane */
202 ROUND(aaa
, bbb
, ccc
, ddd
, F1
, KK4
, in
[8], 15);
203 ROUND(ddd
, aaa
, bbb
, ccc
, F1
, KK4
, in
[6], 5);
204 ROUND(ccc
, ddd
, aaa
, bbb
, F1
, KK4
, in
[4], 8);
205 ROUND(bbb
, ccc
, ddd
, aaa
, F1
, KK4
, in
[1], 11);
206 ROUND(aaa
, bbb
, ccc
, ddd
, F1
, KK4
, in
[3], 14);
207 ROUND(ddd
, aaa
, bbb
, ccc
, F1
, KK4
, in
[11], 14);
208 ROUND(ccc
, ddd
, aaa
, bbb
, F1
, KK4
, in
[15], 6);
209 ROUND(bbb
, ccc
, ddd
, aaa
, F1
, KK4
, in
[0], 14);
210 ROUND(aaa
, bbb
, ccc
, ddd
, F1
, KK4
, in
[5], 6);
211 ROUND(ddd
, aaa
, bbb
, ccc
, F1
, KK4
, in
[12], 9);
212 ROUND(ccc
, ddd
, aaa
, bbb
, F1
, KK4
, in
[2], 12);
213 ROUND(bbb
, ccc
, ddd
, aaa
, F1
, KK4
, in
[13], 9);
214 ROUND(aaa
, bbb
, ccc
, ddd
, F1
, KK4
, in
[9], 12);
215 ROUND(ddd
, aaa
, bbb
, ccc
, F1
, KK4
, in
[7], 5);
216 ROUND(ccc
, ddd
, aaa
, bbb
, F1
, KK4
, in
[10], 15);
217 ROUND(bbb
, ccc
, ddd
, aaa
, F1
, KK4
, in
[14], 8);
219 /* Swap contents of "d" registers */
220 tmp
= dd
; dd
= ddd
; ddd
= tmp
;
222 /* combine results */
235 static int rmd256_init(struct shash_desc
*desc
)
237 struct rmd256_ctx
*rctx
= shash_desc_ctx(desc
);
239 rctx
->byte_count
= 0;
241 rctx
->state
[0] = RMD_H0
;
242 rctx
->state
[1] = RMD_H1
;
243 rctx
->state
[2] = RMD_H2
;
244 rctx
->state
[3] = RMD_H3
;
245 rctx
->state
[4] = RMD_H5
;
246 rctx
->state
[5] = RMD_H6
;
247 rctx
->state
[6] = RMD_H7
;
248 rctx
->state
[7] = RMD_H8
;
250 memset(rctx
->buffer
, 0, sizeof(rctx
->buffer
));
255 static int rmd256_update(struct shash_desc
*desc
, const u8
*data
,
258 struct rmd256_ctx
*rctx
= shash_desc_ctx(desc
);
259 const u32 avail
= sizeof(rctx
->buffer
) - (rctx
->byte_count
& 0x3f);
261 rctx
->byte_count
+= len
;
263 /* Enough space in buffer? If so copy and we're done */
265 memcpy((char *)rctx
->buffer
+ (sizeof(rctx
->buffer
) - avail
),
270 memcpy((char *)rctx
->buffer
+ (sizeof(rctx
->buffer
) - avail
),
273 rmd256_transform(rctx
->state
, rctx
->buffer
);
277 while (len
>= sizeof(rctx
->buffer
)) {
278 memcpy(rctx
->buffer
, data
, sizeof(rctx
->buffer
));
279 rmd256_transform(rctx
->state
, rctx
->buffer
);
280 data
+= sizeof(rctx
->buffer
);
281 len
-= sizeof(rctx
->buffer
);
284 memcpy(rctx
->buffer
, data
, len
);
290 /* Add padding and return the message digest. */
291 static int rmd256_final(struct shash_desc
*desc
, u8
*out
)
293 struct rmd256_ctx
*rctx
= shash_desc_ctx(desc
);
294 u32 i
, index
, padlen
;
296 __le32
*dst
= (__le32
*)out
;
297 static const u8 padding
[64] = { 0x80, };
299 bits
= cpu_to_le64(rctx
->byte_count
<< 3);
301 /* Pad out to 56 mod 64 */
302 index
= rctx
->byte_count
& 0x3f;
303 padlen
= (index
< 56) ? (56 - index
) : ((64+56) - index
);
304 rmd256_update(desc
, padding
, padlen
);
307 rmd256_update(desc
, (const u8
*)&bits
, sizeof(bits
));
309 /* Store state in digest */
310 for (i
= 0; i
< 8; i
++)
311 dst
[i
] = cpu_to_le32p(&rctx
->state
[i
]);
314 memset(rctx
, 0, sizeof(*rctx
));
319 static struct shash_alg alg
= {
320 .digestsize
= RMD256_DIGEST_SIZE
,
322 .update
= rmd256_update
,
323 .final
= rmd256_final
,
324 .descsize
= sizeof(struct rmd256_ctx
),
326 .cra_name
= "rmd256",
327 .cra_flags
= CRYPTO_ALG_TYPE_SHASH
,
328 .cra_blocksize
= RMD256_BLOCK_SIZE
,
329 .cra_module
= THIS_MODULE
,
333 static int __init
rmd256_mod_init(void)
335 return crypto_register_shash(&alg
);
338 static void __exit
rmd256_mod_fini(void)
340 crypto_unregister_shash(&alg
);
343 module_init(rmd256_mod_init
);
344 module_exit(rmd256_mod_fini
);
346 MODULE_LICENSE("GPL");
347 MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
348 MODULE_DESCRIPTION("RIPEMD-256 Message Digest");
349 MODULE_ALIAS_CRYPTO("rmd256");
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