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[CRYPTO] ripemd: Add support for RIPEMD hash algorithms
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This patch adds support for RIPEMD-128 and RIPEMD-160
hash algorithms.

Signed-off-by: Adrian-Ken Rueegsegger <rueegsegger@swiss-it.ch>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Adrian-Ken Rueegsegger authored and herbertx committed Jul 10, 2008
1 parent 93aa7f8 commit c6580eb
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2 changes: 2 additions & 0 deletions crypto/Makefile
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Expand Up @@ -27,6 +27,8 @@ obj-$(CONFIG_CRYPTO_XCBC) += xcbc.o
obj-$(CONFIG_CRYPTO_NULL) += crypto_null.o
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-$(CONFIG_CRYPTO_SHA1) += sha1_generic.o
obj-$(CONFIG_CRYPTO_SHA256) += sha256_generic.o
obj-$(CONFIG_CRYPTO_SHA512) += sha512_generic.o
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26 changes: 26 additions & 0 deletions crypto/ripemd.h
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@@ -0,0 +1,26 @@
/*
* Common values for RIPEMD algorithms
*/

#ifndef _CRYPTO_RMD_H
#define _CRYPTO_RMD_H

#define RMD128_DIGEST_SIZE 16
#define RMD128_BLOCK_SIZE 64

#define RMD160_DIGEST_SIZE 20
#define RMD160_BLOCK_SIZE 64

#define RMD256_DIGEST_SIZE 32
#define RMD256_BLOCK_SIZE 64

#define RMD320_DIGEST_SIZE 40
#define RMD320_BLOCK_SIZE 64

#define RMD_H0 0x67452301UL
#define RMD_H1 0xefcdab89UL
#define RMD_H2 0x98badcfeUL
#define RMD_H3 0x10325476UL
#define RMD_H4 0xc3d2e1f0UL

#endif
344 changes: 344 additions & 0 deletions crypto/rmd128.c
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@@ -0,0 +1,344 @@
/*
* 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 <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 rmd128_ctx {
u64 byte_count;
u32 state[4];
u32 buffer[16];
};

#define K1 0x00000000UL
#define K2 0x5a827999UL
#define K3 0x6ed9eba1UL
#define K4 0x8f1bbcdcUL
#define KK1 0x50a28be6UL
#define KK2 0x5c4dd124UL
#define KK3 0x6d703ef3UL
#define KK4 0x00000000UL

#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 rmd128_transform(u32 *state, u32 const *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 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 rmd128_transform_helper(struct rmd128_ctx *ctx)
{
le32_to_cpu_array(ctx->buffer, sizeof(ctx->buffer) / sizeof(u32));
rmd128_transform(ctx->state, ctx->buffer);
}

static void rmd128_init(struct crypto_tfm *tfm)
{
struct rmd128_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;

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

static void rmd128_update(struct crypto_tfm *tfm, const u8 *data,
unsigned int len)
{
struct rmd128_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);

rmd128_transform_helper(rctx);
data += avail;
len -= avail;

while (len >= sizeof(rctx->buffer)) {
memcpy(rctx->buffer, data, sizeof(rctx->buffer));
rmd128_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 rmd128_final(struct crypto_tfm *tfm, u8 *out)
{
struct rmd128_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);
rmd128_update(tfm, padding, padlen);

/* Append length */
rmd128_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 = "rmd128",
.cra_driver_name = "rmd128",
.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
.cra_blocksize = RMD128_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct rmd128_ctx),
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(alg.cra_list),
.cra_u = { .digest = {
.dia_digestsize = RMD128_DIGEST_SIZE,
.dia_init = rmd128_init,
.dia_update = rmd128_update,
.dia_final = rmd128_final } }
};

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

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

module_init(rmd128_mod_init);
module_exit(rmd128_mod_fini);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("RIPEMD-128 Message Digest");

MODULE_ALIAS("rmd128");

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