Commit c555c28d authored by Adrian-Ken Rueegsegger's avatar Adrian-Ken Rueegsegger Committed by Herbert Xu
Browse files

[CRYPTO] ripemd: Add support for RIPEMD-256 and RIPEMD-320 



This patch adds support for the extended RIPEMD hash
algorithms RIPEMD-256 and RIPEMD-320.

Signed-off-by: default avatarAdrian-Ken Rueegsegger <rueegsegger@swiss-it.ch>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent ba6b0398

crypto/Makefile

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Original line number Diff line number Diff line
@@ -29,6 +29,8 @@ obj-$(CONFIG_CRYPTO_MD4) += md4.o 
obj-$(CONFIG_CRYPTO_MD5) += md5.o

obj-$(CONFIG_CRYPTO_RMD128) += rmd128.o

obj-$(CONFIG_CRYPTO_RMD160) += rmd160.o

obj-$(CONFIG_CRYPTO_RMD256) += rmd256.o

obj-$(CONFIG_CRYPTO_RMD320) += rmd320.o

obj-$(CONFIG_CRYPTO_SHA1) += sha1_generic.o

obj-$(CONFIG_CRYPTO_SHA256) += sha256_generic.o

obj-$(CONFIG_CRYPTO_SHA512) += sha512_generic.o

crypto/rmd256.c

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/*

 * Cryptographic API.

 *

 * RIPEMD-256 - RACE Integrity Primitives Evaluation Message Digest.

 *

 * Based on the reference implementation by Antoon Bosselaers, ESAT-COSIC

 *

 * Copyright (c) 2008 Adrian-Ken Rueegsegger <rueegsegger (at) swiss-it.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 <linux/init.h>

#include <linux/module.h>

#include <linux/mm.h>

#include <linux/crypto.h>

#include <linux/cryptohash.h>

#include <linux/types.h>

#include <asm/byteorder.h>



#include "ripemd.h"



struct rmd256_ctx {

	u64 byte_count;

	u32 state[8];

	u32 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)) + (x) + (k); \

	(a) = rol32((a), (s)); \

}



static void rmd256_transform(u32 *state, u32 const *in)

{

	u32 aa, bb, cc, dd, aaa, bbb, ccc, ddd, tmp;



	/* Initialize left lane */

	aa = state[0];

	bb = state[1];

	cc = state[2];

	dd = state[3];



	/* Initialize right lane */

	aaa = state[4];

	bbb = state[5];

	ccc = state[6];

	ddd = state[7];



	/* 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 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);



	/* Swap contents of "a" registers */

	tmp = aa; aa = aaa; aaa = tmp;



	/* 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 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);



	/* Swap contents of "b" registers */

	tmp = bb; bb = bbb; bbb = tmp;



	/* 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 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);



	/* Swap contents of "c" registers */

	tmp = cc; cc = ccc; ccc = tmp;



	/* 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 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);



	/* Swap contents of "d" registers */

	tmp = dd; dd = ddd; ddd = tmp;



	/* combine results */

	state[0] += aa;

	state[1] += bb;

	state[2] += cc;

	state[3] += dd;

	state[4] += aaa;

	state[5] += bbb;

	state[6] += ccc;

	state[7] += ddd;



	return;

}



static inline void le32_to_cpu_array(u32 *buf, unsigned int words)

{

	while (words--) {

		le32_to_cpus(buf);

		buf++;

	}

}



static inline void cpu_to_le32_array(u32 *buf, unsigned int words)

{

	while (words--) {

		cpu_to_le32s(buf);

		buf++;

	}

}



static inline void rmd256_transform_helper(struct rmd256_ctx *ctx)

{

	le32_to_cpu_array(ctx->buffer, sizeof(ctx->buffer) / sizeof(u32));

	rmd256_transform(ctx->state, ctx->buffer);

}



static void rmd256_init(struct crypto_tfm *tfm)

{

	struct rmd256_ctx *rctx = crypto_tfm_ctx(tfm);



	rctx->byte_count = 0;



	rctx->state[0] = RMD_H0;

	rctx->state[1] = RMD_H1;

	rctx->state[2] = RMD_H2;

	rctx->state[3] = RMD_H3;

	rctx->state[4] = RMD_H5;

	rctx->state[5] = RMD_H6;

	rctx->state[6] = RMD_H7;

	rctx->state[7] = RMD_H8;



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

}



static void rmd256_update(struct crypto_tfm *tfm, const u8 *data,

			  unsigned int len)

{

	struct rmd256_ctx *rctx = crypto_tfm_ctx(tfm);

	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);

		return;

	}



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

	       data, avail);



	rmd256_transform_helper(rctx);

	data += avail;

	len -= avail;



	while (len >= sizeof(rctx->buffer)) {

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

		rmd256_transform_helper(rctx);

		data += sizeof(rctx->buffer);

		len -= sizeof(rctx->buffer);

	}



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

}



/* Add padding and return the message digest. */

static void rmd256_final(struct crypto_tfm *tfm, u8 *out)

{

	struct rmd256_ctx *rctx = crypto_tfm_ctx(tfm);

	u32 index, padlen;

	u64 bits;

	static const u8 padding[64] = { 0x80, };

	bits = rctx->byte_count << 3;



	/* Pad out to 56 mod 64 */

	index = rctx->byte_count & 0x3f;

	padlen = (index < 56) ? (56 - index) : ((64+56) - index);

	rmd256_update(tfm, padding, padlen);



	/* Append length */

	rmd256_update(tfm, (const u8 *)&bits, sizeof(bits));



	/* Store state in digest */

	memcpy(out, rctx->state, sizeof(rctx->state));



	/* Wipe context */

	memset(rctx, 0, sizeof(*rctx));

}



static struct crypto_alg alg = {

	.cra_name	 =	"rmd256",

	.cra_driver_name =	"rmd256",

	.cra_flags	 =	CRYPTO_ALG_TYPE_DIGEST,

	.cra_blocksize	 =	RMD256_BLOCK_SIZE,

	.cra_ctxsize	 =	sizeof(struct rmd256_ctx),

	.cra_module	 =	THIS_MODULE,

	.cra_list	 =	LIST_HEAD_INIT(alg.cra_list),

	.cra_u		 =	{ .digest = {

	.dia_digestsize	 =	RMD256_DIGEST_SIZE,

	.dia_init	 =	rmd256_init,

	.dia_update	 =	rmd256_update,

	.dia_final	 =	rmd256_final } }

};



static int __init rmd256_mod_init(void)

{

	return crypto_register_alg(&alg);

}



static void __exit rmd256_mod_fini(void)

{

	crypto_unregister_alg(&alg);

}



module_init(rmd256_mod_init);

module_exit(rmd256_mod_fini);



MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("RIPEMD-256 Message Digest");



MODULE_ALIAS("rmd256");

crypto/rmd320.c

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