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authorAdrian-Ken Rueegsegger <rueegsegger@swiss-it.ch>2008-05-09 21:27:02 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2008-07-10 20:35:13 +0800
commitc555c28d9da517579085a00fc80e725b0b5d9fce (patch)
treeee4047e939f8e866457c47bcd4fd0e180a73885d /crypto/rmd256.c
parentba6b0398721524ec817f74ea3492b48fa79de52f (diff)
downloadlinux-c555c28d9da517579085a00fc80e725b0b5d9fce.tar.gz
[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: Adrian-Ken Rueegsegger <rueegsegger@swiss-it.ch> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/rmd256.c')
-rw-r--r--crypto/rmd256.c363
1 files changed, 363 insertions, 0 deletions
diff --git a/crypto/rmd256.c b/crypto/rmd256.c
new file mode 100644
index 00000000000..060ee81cb8a
--- /dev/null
+++ b/crypto/rmd256.c
@@ -0,0 +1,363 @@
+/*
+ * 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");