[mirror_ubuntu-bionic-kernel.git] / crypto / rmd128.c

/*
 * 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 <ken@codelabs.ch>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 */
#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;

	return;
}

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_flags	 =	CRYPTO_ALG_TYPE_SHASH,
		.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);
}

module_init(rmd128_mod_init);
module_exit(rmd128_mod_fini);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
MODULE_DESCRIPTION("RIPEMD-128 Message Digest");
Commit	Line	Data
c6580eb8 AKR	1	/*
	2	* Cryptographic API.
	3	*
	4	* RIPEMD-128 - RACE Integrity Primitives Evaluation Message Digest.
	5	*
	6	* Based on the reference implementation by Antoon Bosselaers, ESAT-COSIC
	7	*
3181c225	8	* Copyright (c) 2008 Adrian-Ken Rueegsegger <ken@codelabs.ch>
c6580eb8 AKR	9	*
	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)
	13	* any later version.
	14	*
	15	*/
7c4468bc	16	#include <crypto/internal/hash.h>
c6580eb8 AKR	17	#include <linux/init.h>
	18	#include <linux/module.h>
	19	#include <linux/mm.h>
c6580eb8 AKR	20	#include <linux/types.h>
	21	#include <asm/byteorder.h>
	22
	23	#include "ripemd.h"
	24
	25	struct rmd128_ctx {
	26	u64 byte_count;
	27	u32 state[4];
b2b6a172	28	__le32 buffer[16];
c6580eb8 AKR	29	};
c6580eb8 AKR	30
ba6b0398 AKR	31	#define K1 RMD_K1
	32	#define K2 RMD_K2
	33	#define K3 RMD_K3
	34	#define K4 RMD_K4
	35	#define KK1 RMD_K6
	36	#define KK2 RMD_K7
	37	#define KK3 RMD_K8
	38	#define KK4 RMD_K1
c6580eb8 AKR	39
	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 */
	44
	45	#define ROUND(a, b, c, d, f, k, x, s) { \
5cdcc22f	46	(a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \
c6580eb8 AKR	47	(a) = rol32((a), (s)); \
	48	}
	49
b2b6a172	50	static void rmd128_transform(u32 state, const __le32 in)
c6580eb8 AKR	51	{
	52	u32 aa, bb, cc, dd, aaa, bbb, ccc, ddd;
	53
	54	/* Initialize left lane */
	55	aa = state[0];
	56	bb = state[1];
	57	cc = state[2];
	58	dd = state[3];
	59
	60	/* Initialize right lane */
	61	aaa = state[0];
	62	bbb = state[1];
	63	ccc = state[2];
	64	ddd = state[3];
	65
	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);
	83
	84	/* round 2: left lane */
	85	ROUND(aa, bb, cc, dd, F2, K2, in[7], 7);
	86	ROUND(dd, aa, bb, cc, F2, K2, in[4], 6);
	87	ROUND(cc, dd, aa, bb, F2, K2, in[13], 8);
	88	ROUND(bb, cc, dd, aa, F2, K2, in[1], 13);
	89	ROUND(aa, bb, cc, dd, F2, K2, in[10], 11);
	90	ROUND(dd, aa, bb, cc, F2, K2, in[6], 9);
	91	ROUND(cc, dd, aa, bb, F2, K2, in[15], 7);
	92	ROUND(bb, cc, dd, aa, F2, K2, in[3], 15);
	93	ROUND(aa, bb, cc, dd, F2, K2, in[12], 7);
	94	ROUND(dd, aa, bb, cc, F2, K2, in[0], 12);
	95	ROUND(cc, dd, aa, bb, F2, K2, in[9], 15);
	96	ROUND(bb, cc, dd, aa, F2, K2, in[5], 9);
	97	ROUND(aa, bb, cc, dd, F2, K2, in[2], 11);
	98	ROUND(dd, aa, bb, cc, F2, K2, in[14], 7);
	99	ROUND(cc, dd, aa, bb, F2, K2, in[11], 13);
	100	ROUND(bb, cc, dd, aa, F2, K2, in[8], 12);
	101
	102	/* round 3: left lane */
	103	ROUND(aa, bb, cc, dd, F3, K3, in[3], 11);
	104	ROUND(dd, aa, bb, cc, F3, K3, in[10], 13);
	105	ROUND(cc, dd, aa, bb, F3, K3, in[14], 6);
	106	ROUND(bb, cc, dd, aa, F3, K3, in[4], 7);
	107	ROUND(aa, bb, cc, dd, F3, K3, in[9], 14);
	108	ROUND(dd, aa, bb, cc, F3, K3, in[15], 9);
	109	ROUND(cc, dd, aa, bb, F3, K3, in[8], 13);
	110	ROUND(bb, cc, dd, aa, F3, K3, in[1], 15);
	111	ROUND(aa, bb, cc, dd, F3, K3, in[2], 14);
	112	ROUND(dd, aa, bb, cc, F3, K3, in[7], 8);
	113	ROUND(cc, dd, aa, bb, F3, K3, in[0], 13);
	114	ROUND(bb, cc, dd, aa, F3, K3, in[6], 6);
115	ROUND(aa, bb, cc, dd, F3, K3, in[13], 5);
116	ROUND(dd, aa, bb, cc, F3, K3, in[11], 12);
117	ROUND(cc, dd, aa, bb, F3, K3, in[5], 7);
118	ROUND(bb, cc, dd, aa, F3, K3, in[12], 5);
119
120	/* round 4: left lane */
121	ROUND(aa, bb, cc, dd, F4, K4, in[1], 11);
122	ROUND(dd, aa, bb, cc, F4, K4, in[9], 12);
123	ROUND(cc, dd, aa, bb, F4, K4, in[11], 14);
124	ROUND(bb, cc, dd, aa, F4, K4, in[10], 15);
125	ROUND(aa, bb, cc, dd, F4, K4, in[0], 14);
126	ROUND(dd, aa, bb, cc, F4, K4, in[8], 15);
127	ROUND(cc, dd, aa, bb, F4, K4, in[12], 9);
128	ROUND(bb, cc, dd, aa, F4, K4, in[4], 8);
129	ROUND(aa, bb, cc, dd, F4, K4, in[13], 9);
130	ROUND(dd, aa, bb, cc, F4, K4, in[3], 14);
131	ROUND(cc, dd, aa, bb, F4, K4, in[7], 5);
132	ROUND(bb, cc, dd, aa, F4, K4, in[15], 6);
133	ROUND(aa, bb, cc, dd, F4, K4, in[14], 8);
134	ROUND(dd, aa, bb, cc, F4, K4, in[5], 6);
135	ROUND(cc, dd, aa, bb, F4, K4, in[6], 5);
136	ROUND(bb, cc, dd, aa, F4, K4, in[2], 12);
137
138	/* round 1: right lane */
139	ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[5], 8);
140	ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[14], 9);
141	ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[7], 9);
142	ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[0], 11);
143	ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[9], 13);
144	ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[2], 15);
145	ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[11], 15);
146	ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[4], 5);
147	ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[13], 7);
148	ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[6], 7);
149	ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[15], 8);
150	ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[8], 11);
151	ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[1], 14);
152	ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[10], 14);
153	ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[3], 12);
154	ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[12], 6);
155
156	/* round 2: right lane */
157	ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[6], 9);
158	ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[11], 13);
159	ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[3], 15);
160	ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[7], 7);
161	ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[0], 12);
162	ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[13], 8);
163	ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[5], 9);
164	ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[10], 11);
165	ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[14], 7);
166	ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[15], 7);
167	ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[8], 12);
168	ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[12], 7);
169	ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[4], 6);
170	ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[9], 15);
171	ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[1], 13);
172	ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[2], 11);
173
174	/* round 3: right lane */
175	ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[15], 9);
176	ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[5], 7);
177	ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[1], 15);
178	ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[3], 11);
179	ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[7], 8);
180	ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[14], 6);
181	ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[6], 6);
182	ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[9], 14);
183	ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[11], 12);
184	ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[8], 13);
185	ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[12], 5);
186	ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[2], 14);
187	ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[10], 13);
188	ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[0], 13);
189	ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[4], 7);
190	ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[13], 5);
191
192	/* round 4: right lane */
193	ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[8], 15);
194	ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[6], 5);
195	ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[4], 8);
196	ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[1], 11);
197	ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[3], 14);
198	ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[11], 14);
199	ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[15], 6);
200	ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[0], 14);
201	ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[5], 6);
202	ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[12], 9);
203	ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[2], 12);
204	ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[13], 9);
205	ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[9], 12);
206	ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[7], 5);
207	ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[10], 15);
208	ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[14], 8);
209
210	/* combine results */
211	ddd += cc + state[1]; /* final result for state[0] */
212	state[1] = state[2] + dd + aaa;
213	state[2] = state[3] + aa + bbb;
214	state[3] = state[0] + bb + ccc;
215	state[0] = ddd;
216
217	return;
218	}
219
7c4468bc	220	static int rmd128_init(struct shash_desc *desc)
c6580eb8	221	{
7c4468bc	222	struct rmd128_ctx *rctx = shash_desc_ctx(desc);
c6580eb8 AKR	223
	224	rctx->byte_count = 0;
	225
	226	rctx->state[0] = RMD_H0;
	227	rctx->state[1] = RMD_H1;
	228	rctx->state[2] = RMD_H2;
	229	rctx->state[3] = RMD_H3;
	230
	231	memset(rctx->buffer, 0, sizeof(rctx->buffer));
7c4468bc HX	232
7c4468bc HX	233	return 0;
c6580eb8 AKR	234	}
c6580eb8 AKR	235
7c4468bc HX	236	static int rmd128_update(struct shash_desc desc, const u8 data,
7c4468bc HX	237	unsigned int len)
c6580eb8	238	{
7c4468bc	239	struct rmd128_ctx *rctx = shash_desc_ctx(desc);
c6580eb8 AKR	240	const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);
	241
	242	rctx->byte_count += len;
	243
	244	/* Enough space in buffer? If so copy and we're done */
	245	if (avail > len) {
	246	memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
	247	data, len);
7c4468bc	248	goto out;
c6580eb8 AKR	249	}
	250
	251	memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
	252	data, avail);
	253
0f923a2a	254	rmd128_transform(rctx->state, rctx->buffer);
c6580eb8 AKR	255	data += avail;
	256	len -= avail;
	257
	258	while (len >= sizeof(rctx->buffer)) {
	259	memcpy(rctx->buffer, data, sizeof(rctx->buffer));
0f923a2a	260	rmd128_transform(rctx->state, rctx->buffer);
c6580eb8 AKR	261	data += sizeof(rctx->buffer);
	262	len -= sizeof(rctx->buffer);
	263	}
	264
	265	memcpy(rctx->buffer, data, len);
7c4468bc HX	266
	267	out:
	268	return 0;
c6580eb8 AKR	269	}
	270
	271	/* Add padding and return the message digest. */
7c4468bc	272	static int rmd128_final(struct shash_desc desc, u8 out)
c6580eb8	273	{
7c4468bc	274	struct rmd128_ctx *rctx = shash_desc_ctx(desc);
0f923a2a	275	u32 i, index, padlen;
b2b6a172 HH	276	__le64 bits;
b2b6a172 HH	277	__le32 dst = (__le32 )out;
c6580eb8	278	static const u8 padding[64] = { 0x80, };
0f923a2a AKR	279
0f923a2a AKR	280	bits = cpu_to_le64(rctx->byte_count << 3);
c6580eb8 AKR	281
	282	/* Pad out to 56 mod 64 */
	283	index = rctx->byte_count & 0x3f;
	284	padlen = (index < 56) ? (56 - index) : ((64+56) - index);
7c4468bc	285	rmd128_update(desc, padding, padlen);
c6580eb8 AKR	286
c6580eb8 AKR	287	/* Append length */
7c4468bc	288	rmd128_update(desc, (const u8 *)&bits, sizeof(bits));
c6580eb8 AKR	289
c6580eb8 AKR	290	/* Store state in digest */
0f923a2a	291	for (i = 0; i < 4; i++)
5cdcc22f	292	dst[i] = cpu_to_le32p(&rctx->state[i]);
c6580eb8 AKR	293
	294	/* Wipe context */
	295	memset(rctx, 0, sizeof(*rctx));
7c4468bc HX	296
7c4468bc HX	297	return 0;
c6580eb8 AKR	298	}
c6580eb8 AKR	299
7c4468bc HX	300	static struct shash_alg alg = {
	301	.digestsize = RMD128_DIGEST_SIZE,
	302	.init = rmd128_init,
	303	.update = rmd128_update,
	304	.final = rmd128_final,
	305	.descsize = sizeof(struct rmd128_ctx),
	306	.base = {
	307	.cra_name = "rmd128",
	308	.cra_flags = CRYPTO_ALG_TYPE_SHASH,
	309	.cra_blocksize = RMD128_BLOCK_SIZE,
	310	.cra_module = THIS_MODULE,
	311	}
c6580eb8 AKR	312	};
	313
	314	static int __init rmd128_mod_init(void)
	315	{
7c4468bc	316	return crypto_register_shash(&alg);
c6580eb8 AKR	317	}
	318
	319	static void __exit rmd128_mod_fini(void)
	320	{
7c4468bc	321	crypto_unregister_shash(&alg);
c6580eb8 AKR	322	}
	323
	324	module_init(rmd128_mod_init);
	325	module_exit(rmd128_mod_fini);
	326
	327	MODULE_LICENSE("GPL");
3181c225	328	MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
c6580eb8	329	MODULE_DESCRIPTION("RIPEMD-128 Message Digest");