[linux.git] / crypto / rmd128.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Cryptographic API.
 *
 * RIPEMD-128 - RACE Integrity Primitives Evaluation Message Digest.
 *
 * Based on the reference implementation by Antoon Bosselaers, ESAT-COSIC
 *
 * Copyright (c) 2008 Adrian-Ken Rueegsegger <[email protected]>
 */
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <asm/byteorder.h>

#include "ripemd.h"

struct rmd128_ctx {
	u64 byte_count;
	u32 state[4];
	__le32 buffer[16];
};

#define K1  RMD_K1
#define K2  RMD_K2
#define K3  RMD_K3
#define K4  RMD_K4
#define KK1 RMD_K6
#define KK2 RMD_K7
#define KK3 RMD_K8
#define KK4 RMD_K1

#define F1(x, y, z) (x ^ y ^ z)		/* XOR */
#define F2(x, y, z) (z ^ (x & (y ^ z)))	/* x ? y : z */
#define F3(x, y, z) ((x | ~y) ^ z)
#define F4(x, y, z) (y ^ (z & (x ^ y)))	/* z ? x : y */

#define ROUND(a, b, c, d, f, k, x, s)  { \
	(a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k);	\
	(a) = rol32((a), (s)); \
}

static void rmd128_transform(u32 *state, const __le32 *in)
{
	u32 aa, bb, cc, dd, aaa, bbb, ccc, ddd;

	/* Initialize left lane */
	aa = state[0];
	bb = state[1];
	cc = state[2];
	dd = state[3];

	/* Initialize right lane */
	aaa = state[0];
	bbb = state[1];
	ccc = state[2];
	ddd = state[3];

	/* round 1: left lane */
	ROUND(aa, bb, cc, dd, F1, K1, in[0],  11);
	ROUND(dd, aa, bb, cc, F1, K1, in[1],  14);
	ROUND(cc, dd, aa, bb, F1, K1, in[2],  15);
	ROUND(bb, cc, dd, aa, F1, K1, in[3],  12);
	ROUND(aa, bb, cc, dd, F1, K1, in[4],   5);
	ROUND(dd, aa, bb, cc, F1, K1, in[5],   8);
	ROUND(cc, dd, aa, bb, F1, K1, in[6],   7);
	ROUND(bb, cc, dd, aa, F1, K1, in[7],   9);
	ROUND(aa, bb, cc, dd, F1, K1, in[8],  11);
	ROUND(dd, aa, bb, cc, F1, K1, in[9],  13);
	ROUND(cc, dd, aa, bb, F1, K1, in[10], 14);
	ROUND(bb, cc, dd, aa, F1, K1, in[11], 15);
	ROUND(aa, bb, cc, dd, F1, K1, in[12],  6);
	ROUND(dd, aa, bb, cc, F1, K1, in[13],  7);
	ROUND(cc, dd, aa, bb, F1, K1, in[14],  9);
	ROUND(bb, cc, dd, aa, F1, K1, in[15],  8);

	/* round 2: left lane */
	ROUND(aa, bb, cc, dd, F2, K2, in[7],   7);
	ROUND(dd, aa, bb, cc, F2, K2, in[4],   6);
	ROUND(cc, dd, aa, bb, F2, K2, in[13],  8);
	ROUND(bb, cc, dd, aa, F2, K2, in[1],  13);
	ROUND(aa, bb, cc, dd, F2, K2, in[10], 11);
	ROUND(dd, aa, bb, cc, F2, K2, in[6],   9);
	ROUND(cc, dd, aa, bb, F2, K2, in[15],  7);
	ROUND(bb, cc, dd, aa, F2, K2, in[3],  15);
	ROUND(aa, bb, cc, dd, F2, K2, in[12],  7);
	ROUND(dd, aa, bb, cc, F2, K2, in[0],  12);
	ROUND(cc, dd, aa, bb, F2, K2, in[9],  15);
	ROUND(bb, cc, dd, aa, F2, K2, in[5],   9);
	ROUND(aa, bb, cc, dd, F2, K2, in[2],  11);
	ROUND(dd, aa, bb, cc, F2, K2, in[14],  7);
	ROUND(cc, dd, aa, bb, F2, K2, in[11], 13);
	ROUND(bb, cc, dd, aa, F2, K2, in[8],  12);

	/* round 3: left lane */
	ROUND(aa, bb, cc, dd, F3, K3, in[3],  11);
	ROUND(dd, aa, bb, cc, F3, K3, in[10], 13);
	ROUND(cc, dd, aa, bb, F3, K3, in[14],  6);
	ROUND(bb, cc, dd, aa, F3, K3, in[4],   7);
	ROUND(aa, bb, cc, dd, F3, K3, in[9],  14);
	ROUND(dd, aa, bb, cc, F3, K3, in[15],  9);
	ROUND(cc, dd, aa, bb, F3, K3, in[8],  13);
	ROUND(bb, cc, dd, aa, F3, K3, in[1],  15);
	ROUND(aa, bb, cc, dd, F3, K3, in[2],  14);
	ROUND(dd, aa, bb, cc, F3, K3, in[7],   8);
	ROUND(cc, dd, aa, bb, F3, K3, in[0],  13);
	ROUND(bb, cc, dd, aa, F3, K3, in[6],   6);
	ROUND(aa, bb, cc, dd, F3, K3, in[13],  5);
	ROUND(dd, aa, bb, cc, F3, K3, in[11], 12);
	ROUND(cc, dd, aa, bb, F3, K3, in[5],   7);
	ROUND(bb, cc, dd, aa, F3, K3, in[12],  5);

	/* round 4: left lane */
	ROUND(aa, bb, cc, dd, F4, K4, in[1],  11);
	ROUND(dd, aa, bb, cc, F4, K4, in[9],  12);
	ROUND(cc, dd, aa, bb, F4, K4, in[11], 14);
	ROUND(bb, cc, dd, aa, F4, K4, in[10], 15);
	ROUND(aa, bb, cc, dd, F4, K4, in[0],  14);
	ROUND(dd, aa, bb, cc, F4, K4, in[8],  15);
	ROUND(cc, dd, aa, bb, F4, K4, in[12],  9);
	ROUND(bb, cc, dd, aa, F4, K4, in[4],   8);
	ROUND(aa, bb, cc, dd, F4, K4, in[13],  9);
	ROUND(dd, aa, bb, cc, F4, K4, in[3],  14);
	ROUND(cc, dd, aa, bb, F4, K4, in[7],   5);
	ROUND(bb, cc, dd, aa, F4, K4, in[15],  6);
	ROUND(aa, bb, cc, dd, F4, K4, in[14],  8);
	ROUND(dd, aa, bb, cc, F4, K4, in[5],   6);
	ROUND(cc, dd, aa, bb, F4, K4, in[6],   5);
	ROUND(bb, cc, dd, aa, F4, K4, in[2],  12);

	/* round 1: right lane */
	ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[5],   8);
	ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[14],  9);
	ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[7],   9);
	ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[0],  11);
	ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[9],  13);
	ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[2],  15);
	ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[11], 15);
	ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[4],   5);
	ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[13],  7);
	ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[6],   7);
	ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[15],  8);
	ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[8],  11);
	ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[1],  14);
	ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[10], 14);
	ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[3],  12);
	ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[12],  6);

	/* round 2: right lane */
	ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[6],   9);
	ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[11], 13);
	ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[3],  15);
	ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[7],   7);
	ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[0],  12);
	ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[13],  8);
	ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[5],   9);
	ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[10], 11);
	ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[14],  7);
	ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[15],  7);
	ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[8],  12);
	ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[12],  7);
	ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[4],   6);
	ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[9],  15);
	ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[1],  13);
	ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[2],  11);

	/* round 3: right lane */
	ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[15],  9);
	ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[5],   7);
	ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[1],  15);
	ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[3],  11);
	ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[7],   8);
	ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[14],  6);
	ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[6],   6);
	ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[9],  14);
	ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[11], 12);
	ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[8],  13);
	ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[12],  5);
	ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[2],  14);
	ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[10], 13);
	ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[0],  13);
	ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[4],   7);
	ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[13],  5);

	/* round 4: right lane */
	ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[8],  15);
	ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[6],   5);
	ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[4],   8);
	ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[1],  11);
	ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[3],  14);
	ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[11], 14);
	ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[15],  6);
	ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[0],  14);
	ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[5],   6);
	ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[12],  9);
	ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[2],  12);
	ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[13],  9);
	ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[9],  12);
	ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[7],   5);
	ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[10], 15);
	ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[14],  8);

	/* combine results */
	ddd += cc + state[1];		/* final result for state[0] */
	state[1] = state[2] + dd + aaa;
	state[2] = state[3] + aa + bbb;
	state[3] = state[0] + bb + ccc;
	state[0] = ddd;
}

static int rmd128_init(struct shash_desc *desc)
{
	struct rmd128_ctx *rctx = shash_desc_ctx(desc);

	rctx->byte_count = 0;

	rctx->state[0] = RMD_H0;
	rctx->state[1] = RMD_H1;
	rctx->state[2] = RMD_H2;
	rctx->state[3] = RMD_H3;

	memset(rctx->buffer, 0, sizeof(rctx->buffer));

	return 0;
}

static int rmd128_update(struct shash_desc *desc, const u8 *data,
			 unsigned int len)
{
	struct rmd128_ctx *rctx = shash_desc_ctx(desc);
	const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);

	rctx->byte_count += len;

	/* Enough space in buffer? If so copy and we're done */
	if (avail > len) {
		memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
		       data, len);
		goto out;
	}

	memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
	       data, avail);

	rmd128_transform(rctx->state, rctx->buffer);
	data += avail;
	len -= avail;

	while (len >= sizeof(rctx->buffer)) {
		memcpy(rctx->buffer, data, sizeof(rctx->buffer));
		rmd128_transform(rctx->state, rctx->buffer);
		data += sizeof(rctx->buffer);
		len -= sizeof(rctx->buffer);
	}

	memcpy(rctx->buffer, data, len);

out:
	return 0;
}

/* Add padding and return the message digest. */
static int rmd128_final(struct shash_desc *desc, u8 *out)
{
	struct rmd128_ctx *rctx = shash_desc_ctx(desc);
	u32 i, index, padlen;
	__le64 bits;
	__le32 *dst = (__le32 *)out;
	static const u8 padding[64] = { 0x80, };

	bits = cpu_to_le64(rctx->byte_count << 3);

	/* Pad out to 56 mod 64 */
	index = rctx->byte_count & 0x3f;
	padlen = (index < 56) ? (56 - index) : ((64+56) - index);
	rmd128_update(desc, padding, padlen);

	/* Append length */
	rmd128_update(desc, (const u8 *)&bits, sizeof(bits));

	/* Store state in digest */
	for (i = 0; i < 4; i++)
		dst[i] = cpu_to_le32p(&rctx->state[i]);

	/* Wipe context */
	memset(rctx, 0, sizeof(*rctx));

	return 0;
}

static struct shash_alg alg = {
	.digestsize	=	RMD128_DIGEST_SIZE,
	.init		=	rmd128_init,
	.update		=	rmd128_update,
	.final		=	rmd128_final,
	.descsize	=	sizeof(struct rmd128_ctx),
	.base		=	{
		.cra_name	 =	"rmd128",
		.cra_driver_name =	"rmd128-generic",
		.cra_blocksize	 =	RMD128_BLOCK_SIZE,
		.cra_module	 =	THIS_MODULE,
	}
};

static int __init rmd128_mod_init(void)
{
	return crypto_register_shash(&alg);
}

static void __exit rmd128_mod_fini(void)
{
	crypto_unregister_shash(&alg);
}

subsys_initcall(rmd128_mod_init);
module_exit(rmd128_mod_fini);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Adrian-Ken Rueegsegger <[email protected]>");
MODULE_DESCRIPTION("RIPEMD-128 Message Digest");
MODULE_ALIAS_CRYPTO("rmd128");
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
c6580eb8 AKR	2	/*
	3	* Cryptographic API.
	4	*
	5	* RIPEMD-128 - RACE Integrity Primitives Evaluation Message Digest.
	6	*
	7	* Based on the reference implementation by Antoon Bosselaers, ESAT-COSIC
	8	*
3181c225	9	* Copyright (c) 2008 Adrian-Ken Rueegsegger <[email protected]>
c6580eb8	10	*/
7c4468bc	11	#include <crypto/internal/hash.h>
c6580eb8 AKR	12	#include <linux/init.h>
	13	#include <linux/module.h>
	14	#include <linux/mm.h>
c6580eb8 AKR	15	#include <linux/types.h>
	16	#include <asm/byteorder.h>
	17
	18	#include "ripemd.h"
	19
	20	struct rmd128_ctx {
	21	u64 byte_count;
	22	u32 state[4];
b2b6a172	23	__le32 buffer[16];
c6580eb8 AKR	24	};
c6580eb8 AKR	25
ba6b0398 AKR	26	#define K1 RMD_K1
	27	#define K2 RMD_K2
	28	#define K3 RMD_K3
	29	#define K4 RMD_K4
	30	#define KK1 RMD_K6
	31	#define KK2 RMD_K7
	32	#define KK3 RMD_K8
	33	#define KK4 RMD_K1
c6580eb8 AKR	34
	35	#define F1(x, y, z) (x ^ y ^ z) /* XOR */
	36	#define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */
	37	#define F3(x, y, z) ((x \| ~y) ^ z)
	38	#define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */
	39
	40	#define ROUND(a, b, c, d, f, k, x, s) { \
5cdcc22f	41	(a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \
c6580eb8 AKR	42	(a) = rol32((a), (s)); \
	43	}
	44
b2b6a172	45	static void rmd128_transform(u32 state, const __le32 in)
c6580eb8 AKR	46	{
	47	u32 aa, bb, cc, dd, aaa, bbb, ccc, ddd;
	48
	49	/* Initialize left lane */
	50	aa = state[0];
	51	bb = state[1];
	52	cc = state[2];
	53	dd = state[3];
	54
	55	/* Initialize right lane */
	56	aaa = state[0];
	57	bbb = state[1];
	58	ccc = state[2];
	59	ddd = state[3];
	60
	61	/* round 1: left lane */
	62	ROUND(aa, bb, cc, dd, F1, K1, in[0], 11);
	63	ROUND(dd, aa, bb, cc, F1, K1, in[1], 14);
	64	ROUND(cc, dd, aa, bb, F1, K1, in[2], 15);
	65	ROUND(bb, cc, dd, aa, F1, K1, in[3], 12);
	66	ROUND(aa, bb, cc, dd, F1, K1, in[4], 5);
	67	ROUND(dd, aa, bb, cc, F1, K1, in[5], 8);
	68	ROUND(cc, dd, aa, bb, F1, K1, in[6], 7);
	69	ROUND(bb, cc, dd, aa, F1, K1, in[7], 9);
	70	ROUND(aa, bb, cc, dd, F1, K1, in[8], 11);
	71	ROUND(dd, aa, bb, cc, F1, K1, in[9], 13);
	72	ROUND(cc, dd, aa, bb, F1, K1, in[10], 14);
	73	ROUND(bb, cc, dd, aa, F1, K1, in[11], 15);
	74	ROUND(aa, bb, cc, dd, F1, K1, in[12], 6);
	75	ROUND(dd, aa, bb, cc, F1, K1, in[13], 7);
	76	ROUND(cc, dd, aa, bb, F1, K1, in[14], 9);
	77	ROUND(bb, cc, dd, aa, F1, K1, in[15], 8);
	78
	79	/* round 2: left lane */
	80	ROUND(aa, bb, cc, dd, F2, K2, in[7], 7);
	81	ROUND(dd, aa, bb, cc, F2, K2, in[4], 6);
	82	ROUND(cc, dd, aa, bb, F2, K2, in[13], 8);
	83	ROUND(bb, cc, dd, aa, F2, K2, in[1], 13);
	84	ROUND(aa, bb, cc, dd, F2, K2, in[10], 11);
	85	ROUND(dd, aa, bb, cc, F2, K2, in[6], 9);
	86	ROUND(cc, dd, aa, bb, F2, K2, in[15], 7);
	87	ROUND(bb, cc, dd, aa, F2, K2, in[3], 15);
	88	ROUND(aa, bb, cc, dd, F2, K2, in[12], 7);
	89	ROUND(dd, aa, bb, cc, F2, K2, in[0], 12);
	90	ROUND(cc, dd, aa, bb, F2, K2, in[9], 15);
	91	ROUND(bb, cc, dd, aa, F2, K2, in[5], 9);
	92	ROUND(aa, bb, cc, dd, F2, K2, in[2], 11);
	93	ROUND(dd, aa, bb, cc, F2, K2, in[14], 7);
	94	ROUND(cc, dd, aa, bb, F2, K2, in[11], 13);
	95	ROUND(bb, cc, dd, aa, F2, K2, in[8], 12);
	96
	97	/* round 3: left lane */
	98	ROUND(aa, bb, cc, dd, F3, K3, in[3], 11);
	99	ROUND(dd, aa, bb, cc, F3, K3, in[10], 13);
	100	ROUND(cc, dd, aa, bb, F3, K3, in[14], 6);
	101	ROUND(bb, cc, dd, aa, F3, K3, in[4], 7);
	102	ROUND(aa, bb, cc, dd, F3, K3, in[9], 14);
	103	ROUND(dd, aa, bb, cc, F3, K3, in[15], 9);
	104	ROUND(cc, dd, aa, bb, F3, K3, in[8], 13);
	105	ROUND(bb, cc, dd, aa, F3, K3, in[1], 15);
	106	ROUND(aa, bb, cc, dd, F3, K3, in[2], 14);
	107	ROUND(dd, aa, bb, cc, F3, K3, in[7], 8);
	108	ROUND(cc, dd, aa, bb, F3, K3, in[0], 13);
	109	ROUND(bb, cc, dd, aa, F3, K3, in[6], 6);
110	ROUND(aa, bb, cc, dd, F3, K3, in[13], 5);
111	ROUND(dd, aa, bb, cc, F3, K3, in[11], 12);
112	ROUND(cc, dd, aa, bb, F3, K3, in[5], 7);
113	ROUND(bb, cc, dd, aa, F3, K3, in[12], 5);
114
115	/* round 4: left lane */
116	ROUND(aa, bb, cc, dd, F4, K4, in[1], 11);
117	ROUND(dd, aa, bb, cc, F4, K4, in[9], 12);
118	ROUND(cc, dd, aa, bb, F4, K4, in[11], 14);
119	ROUND(bb, cc, dd, aa, F4, K4, in[10], 15);
120	ROUND(aa, bb, cc, dd, F4, K4, in[0], 14);
121	ROUND(dd, aa, bb, cc, F4, K4, in[8], 15);
122	ROUND(cc, dd, aa, bb, F4, K4, in[12], 9);
123	ROUND(bb, cc, dd, aa, F4, K4, in[4], 8);
124	ROUND(aa, bb, cc, dd, F4, K4, in[13], 9);
125	ROUND(dd, aa, bb, cc, F4, K4, in[3], 14);
126	ROUND(cc, dd, aa, bb, F4, K4, in[7], 5);
127	ROUND(bb, cc, dd, aa, F4, K4, in[15], 6);
128	ROUND(aa, bb, cc, dd, F4, K4, in[14], 8);
129	ROUND(dd, aa, bb, cc, F4, K4, in[5], 6);
130	ROUND(cc, dd, aa, bb, F4, K4, in[6], 5);
131	ROUND(bb, cc, dd, aa, F4, K4, in[2], 12);
132
133	/* round 1: right lane */
134	ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[5], 8);
135	ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[14], 9);
136	ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[7], 9);
137	ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[0], 11);
138	ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[9], 13);
139	ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[2], 15);
140	ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[11], 15);
141	ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[4], 5);
142	ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[13], 7);
143	ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[6], 7);
144	ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[15], 8);
145	ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[8], 11);
146	ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[1], 14);
147	ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[10], 14);
148	ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[3], 12);
149	ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[12], 6);
150
151	/* round 2: right lane */
152	ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[6], 9);
153	ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[11], 13);
154	ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[3], 15);
155	ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[7], 7);
156	ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[0], 12);
157	ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[13], 8);
158	ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[5], 9);
159	ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[10], 11);
160	ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[14], 7);
161	ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[15], 7);
162	ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[8], 12);
163	ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[12], 7);
164	ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[4], 6);
165	ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[9], 15);
166	ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[1], 13);
167	ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[2], 11);
168
169	/* round 3: right lane */
170	ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[15], 9);
171	ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[5], 7);
172	ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[1], 15);
173	ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[3], 11);
174	ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[7], 8);
175	ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[14], 6);
176	ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[6], 6);
177	ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[9], 14);
178	ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[11], 12);
179	ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[8], 13);
180	ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[12], 5);
181	ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[2], 14);
182	ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[10], 13);
183	ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[0], 13);
184	ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[4], 7);
185	ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[13], 5);
186
187	/* round 4: right lane */
188	ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[8], 15);
189	ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[6], 5);
190	ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[4], 8);
191	ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[1], 11);
192	ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[3], 14);
193	ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[11], 14);
194	ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[15], 6);
195	ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[0], 14);
196	ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[5], 6);
197	ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[12], 9);
198	ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[2], 12);
199	ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[13], 9);
200	ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[9], 12);
201	ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[7], 5);
202	ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[10], 15);
203	ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[14], 8);
204
205	/* combine results */
206	ddd += cc + state[1]; /* final result for state[0] */
207	state[1] = state[2] + dd + aaa;
208	state[2] = state[3] + aa + bbb;
209	state[3] = state[0] + bb + ccc;
210	state[0] = ddd;
c6580eb8 AKR	211	}
c6580eb8 AKR	212
7c4468bc	213	static int rmd128_init(struct shash_desc *desc)
c6580eb8	214	{
7c4468bc	215	struct rmd128_ctx *rctx = shash_desc_ctx(desc);
c6580eb8 AKR	216
	217	rctx->byte_count = 0;
	218
	219	rctx->state[0] = RMD_H0;
	220	rctx->state[1] = RMD_H1;
	221	rctx->state[2] = RMD_H2;
	222	rctx->state[3] = RMD_H3;
	223
	224	memset(rctx->buffer, 0, sizeof(rctx->buffer));
7c4468bc HX	225
7c4468bc HX	226	return 0;
c6580eb8 AKR	227	}
c6580eb8 AKR	228
7c4468bc HX	229	static int rmd128_update(struct shash_desc desc, const u8 data,
7c4468bc HX	230	unsigned int len)
c6580eb8	231	{
7c4468bc	232	struct rmd128_ctx *rctx = shash_desc_ctx(desc);
c6580eb8 AKR	233	const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);
	234
	235	rctx->byte_count += len;
	236
	237	/* Enough space in buffer? If so copy and we're done */
	238	if (avail > len) {
	239	memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
	240	data, len);
7c4468bc	241	goto out;
c6580eb8 AKR	242	}
	243
	244	memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
	245	data, avail);
	246
0f923a2a	247	rmd128_transform(rctx->state, rctx->buffer);
c6580eb8 AKR	248	data += avail;
	249	len -= avail;
	250
	251	while (len >= sizeof(rctx->buffer)) {
	252	memcpy(rctx->buffer, data, sizeof(rctx->buffer));
0f923a2a	253	rmd128_transform(rctx->state, rctx->buffer);
c6580eb8 AKR	254	data += sizeof(rctx->buffer);
	255	len -= sizeof(rctx->buffer);
	256	}
	257
	258	memcpy(rctx->buffer, data, len);
7c4468bc HX	259
	260	out:
	261	return 0;
c6580eb8 AKR	262	}
	263
	264	/* Add padding and return the message digest. */
7c4468bc	265	static int rmd128_final(struct shash_desc desc, u8 out)
c6580eb8	266	{
7c4468bc	267	struct rmd128_ctx *rctx = shash_desc_ctx(desc);
0f923a2a	268	u32 i, index, padlen;
b2b6a172 HH	269	__le64 bits;
b2b6a172 HH	270	__le32 dst = (__le32 )out;
c6580eb8	271	static const u8 padding[64] = { 0x80, };
0f923a2a AKR	272
0f923a2a AKR	273	bits = cpu_to_le64(rctx->byte_count << 3);
c6580eb8 AKR	274
	275	/* Pad out to 56 mod 64 */
	276	index = rctx->byte_count & 0x3f;
	277	padlen = (index < 56) ? (56 - index) : ((64+56) - index);
7c4468bc	278	rmd128_update(desc, padding, padlen);
c6580eb8 AKR	279
c6580eb8 AKR	280	/* Append length */
7c4468bc	281	rmd128_update(desc, (const u8 *)&bits, sizeof(bits));
c6580eb8 AKR	282
c6580eb8 AKR	283	/* Store state in digest */
0f923a2a	284	for (i = 0; i < 4; i++)
5cdcc22f	285	dst[i] = cpu_to_le32p(&rctx->state[i]);
c6580eb8 AKR	286
	287	/* Wipe context */
	288	memset(rctx, 0, sizeof(*rctx));
7c4468bc HX	289
7c4468bc HX	290	return 0;
c6580eb8 AKR	291	}
c6580eb8 AKR	292
7c4468bc HX	293	static struct shash_alg alg = {
	294	.digestsize = RMD128_DIGEST_SIZE,
	295	.init = rmd128_init,
	296	.update = rmd128_update,
	297	.final = rmd128_final,
	298	.descsize = sizeof(struct rmd128_ctx),
	299	.base = {
	300	.cra_name = "rmd128",
d6ebf528	301	.cra_driver_name = "rmd128-generic",
7c4468bc HX	302	.cra_blocksize = RMD128_BLOCK_SIZE,
	303	.cra_module = THIS_MODULE,
	304	}
c6580eb8 AKR	305	};
	306
	307	static int __init rmd128_mod_init(void)
	308	{
7c4468bc	309	return crypto_register_shash(&alg);
c6580eb8 AKR	310	}
	311
	312	static void __exit rmd128_mod_fini(void)
	313	{
7c4468bc	314	crypto_unregister_shash(&alg);
c6580eb8 AKR	315	}
c6580eb8 AKR	316
c4741b23	317	subsys_initcall(rmd128_mod_init);
c6580eb8 AKR	318	module_exit(rmd128_mod_fini);
	319
	320	MODULE_LICENSE("GPL");
3181c225	321	MODULE_AUTHOR("Adrian-Ken Rueegsegger <[email protected]>");
c6580eb8	322	MODULE_DESCRIPTION("RIPEMD-128 Message Digest");
5d26a105	323	MODULE_ALIAS_CRYPTO("rmd128");