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>
40 #define F1(x, y, z) (x ^ y ^ z)		/* XOR */  argument
41 #define F2(x, y, z) (z ^ (x & (y ^ z)))	/* x ? y : z */  argument
42 #define F3(x, y, z) ((x | ~y) ^ z)  argument
43 #define F4(x, y, z) (y ^ (z & (x ^ y)))	/* z ? x : y */  argument
45 #define ROUND(a, b, c, d, f, k, x, s)  { \  argument
46 	(a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \
47 	(a) = rol32((a), (s)); \
55 	aa = state[0];  in rmd256_transform()
67 	ROUND(aa, bb, cc, dd, F1, K1, in[0],  11);  in rmd256_transform()
74 	ROUND(bb, cc, dd, aa, F1, K1, in[7],   9);  in rmd256_transform()
76 	ROUND(dd, aa, bb, cc, F1, K1, in[9],  13);  in rmd256_transform()
81 	ROUND(cc, dd, aa, bb, F1, K1, in[14],  9);  in rmd256_transform()
86 	ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[14],  9);  in rmd256_transform()
87 	ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[7],   9);  in rmd256_transform()
88 	ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[0],  11);  in rmd256_transform()
89 	ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[9],  13);  in rmd256_transform()
102 	/* Swap contents of "a" registers */  in rmd256_transform()
111 	ROUND(dd, aa, bb, cc, F2, K2, in[6],   9);  in rmd256_transform()
115 	ROUND(dd, aa, bb, cc, F2, K2, in[0],  12);  in rmd256_transform()
116 	ROUND(cc, dd, aa, bb, F2, K2, in[9],  15);  in rmd256_transform()
117 	ROUND(bb, cc, dd, aa, F2, K2, in[5],   9);  in rmd256_transform()
124 	ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[6],   9);  in rmd256_transform()
128 	ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[0],  12);  in rmd256_transform()
130 	ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[5],   9);  in rmd256_transform()
137 	ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[9],  15);  in rmd256_transform()
149 	ROUND(aa, bb, cc, dd, F3, K3, in[9],  14);  in rmd256_transform()
150 	ROUND(dd, aa, bb, cc, F3, K3, in[15],  9);  in rmd256_transform()
155 	ROUND(cc, dd, aa, bb, F3, K3, in[0],  13);  in rmd256_transform()
163 	ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[15],  9);  in rmd256_transform()
170 	ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[9],  14);  in rmd256_transform()
176 	ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[0],  13);  in rmd256_transform()
185 	ROUND(dd, aa, bb, cc, F4, K4, in[9],  12);  in rmd256_transform()
188 	ROUND(aa, bb, cc, dd, F4, K4, in[0],  14);  in rmd256_transform()
190 	ROUND(cc, dd, aa, bb, F4, K4, in[12],  9);  in rmd256_transform()
192 	ROUND(aa, bb, cc, dd, F4, K4, in[13],  9);  in rmd256_transform()
209 	ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[0],  14);  in rmd256_transform()
211 	ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[12],  9);  in rmd256_transform()
213 	ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[13],  9);  in rmd256_transform()
214 	ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[9],  12);  in rmd256_transform()
223 	state[0] += aa;  in rmd256_transform()
237 	rctx->byte_count = 0;  in rmd256_init()
239 	rctx->state[0] = RMD_H0;  in rmd256_init()
240 	rctx->state[1] = RMD_H1;  in rmd256_init()
241 	rctx->state[2] = RMD_H2;  in rmd256_init()
242 	rctx->state[3] = RMD_H3;  in rmd256_init()
243 	rctx->state[4] = RMD_H5;  in rmd256_init()
244 	rctx->state[5] = RMD_H6;  in rmd256_init()
245 	rctx->state[6] = RMD_H7;  in rmd256_init()
246 	rctx->state[7] = RMD_H8;  in rmd256_init()
248 	memset(rctx->buffer, 0, sizeof(rctx->buffer));  in rmd256_init()
250 	return 0;  in rmd256_init()
257 	const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);  in rmd256_update()
259 	rctx->byte_count += len;  in rmd256_update()
263 		memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),  in rmd256_update()
268 	memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),  in rmd256_update()
271 	rmd256_transform(rctx->state, rctx->buffer);  in rmd256_update()
273 	len -= avail;  in rmd256_update()
275 	while (len >= sizeof(rctx->buffer)) {  in rmd256_update()
276 		memcpy(rctx->buffer, data, sizeof(rctx->buffer));  in rmd256_update()
277 		rmd256_transform(rctx->state, rctx->buffer);  in rmd256_update()
278 		data += sizeof(rctx->buffer);  in rmd256_update()
279 		len -= sizeof(rctx->buffer);  in rmd256_update()
282 	memcpy(rctx->buffer, data, len);  in rmd256_update()
285 	return 0;  in rmd256_update()
295 	static const u8 padding[64] = { 0x80, };  in rmd256_final()
297 	bits = cpu_to_le64(rctx->byte_count << 3);  in rmd256_final()
300 	index = rctx->byte_count & 0x3f;  in rmd256_final()
301 	padlen = (index < 56) ? (56 - index) : ((64+56) - index);  in rmd256_final()
308 	for (i = 0; i < 8; i++)  in rmd256_final()
309 		dst[i] = cpu_to_le32p(&rctx->state[i]);  in rmd256_final()
312 	memset(rctx, 0, sizeof(*rctx));  in rmd256_final()
314 	return 0;  in rmd256_final()
344 MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
345 MODULE_DESCRIPTION("RIPEMD-256 Message Digest");