Initial import

1 files changed, 374 insertions, 0 deletions

diff --git a/crypto/rmd160.c b/crypto/rmd160.c
new file mode 100644
index 000000000..de585e51d
--- /dev/null
+++ b/crypto/rmd160.c
@@ -0,0 +1,374 @@
+/*
+ * Cryptographic API.
+ *
+ * RIPEMD-160 - 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 rmd160_ctx {
+	u64 byte_count;
+	u32 state[5];
+	__le32 buffer[16];
+};
+
+#define K1  RMD_K1
+#define K2  RMD_K2
+#define K3  RMD_K3
+#define K4  RMD_K4
+#define K5  RMD_K5
+#define KK1 RMD_K6
+#define KK2 RMD_K7
+#define KK3 RMD_K8
+#define KK4 RMD_K9
+#define KK5 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 F5(x, y, z) (x ^ (y | ~z))
+
+#define ROUND(a, b, c, d, e, f, k, x, s)  { \
+	(a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \
+	(a) = rol32((a), (s)) + (e); \
+	(c) = rol32((c), 10); \
+}
+
+static void rmd160_transform(u32 *state, const __le32 *in)
+{
+	u32 aa, bb, cc, dd, ee, aaa, bbb, ccc, ddd, eee;
+
+	/* Initialize left lane */
+	aa = state[0];
+	bb = state[1];
+	cc = state[2];
+	dd = state[3];
+	ee = state[4];
+
+	/* Initialize right lane */
+	aaa = state[0];
+	bbb = state[1];
+	ccc = state[2];
+	ddd = state[3];
+	eee = state[4];
+
+	/* round 1: left lane */
+	ROUND(aa, bb, cc, dd, ee, F1, K1, in[0],  11);
+	ROUND(ee, aa, bb, cc, dd, F1, K1, in[1],  14);
+	ROUND(dd, ee, aa, bb, cc, F1, K1, in[2],  15);
+	ROUND(cc, dd, ee, aa, bb, F1, K1, in[3],  12);
+	ROUND(bb, cc, dd, ee, aa, F1, K1, in[4],   5);
+	ROUND(aa, bb, cc, dd, ee, F1, K1, in[5],   8);
+	ROUND(ee, aa, bb, cc, dd, F1, K1, in[6],   7);
+	ROUND(dd, ee, aa, bb, cc, F1, K1, in[7],   9);
+	ROUND(cc, dd, ee, aa, bb, F1, K1, in[8],  11);
+	ROUND(bb, cc, dd, ee, aa, F1, K1, in[9],  13);
+	ROUND(aa, bb, cc, dd, ee, F1, K1, in[10], 14);
+	ROUND(ee, aa, bb, cc, dd, F1, K1, in[11], 15);
+	ROUND(dd, ee, aa, bb, cc, F1, K1, in[12],  6);
+	ROUND(cc, dd, ee, aa, bb, F1, K1, in[13],  7);
+	ROUND(bb, cc, dd, ee, aa, F1, K1, in[14],  9);
+	ROUND(aa, bb, cc, dd, ee, F1, K1, in[15],  8);
+
+	/* round 2: left lane" */
+	ROUND(ee, aa, bb, cc, dd, F2, K2, in[7],   7);
+	ROUND(dd, ee, aa, bb, cc, F2, K2, in[4],   6);
+	ROUND(cc, dd, ee, aa, bb, F2, K2, in[13],  8);
+	ROUND(bb, cc, dd, ee, aa, F2, K2, in[1],  13);
+	ROUND(aa, bb, cc, dd, ee, F2, K2, in[10], 11);
+	ROUND(ee, aa, bb, cc, dd, F2, K2, in[6],   9);
+	ROUND(dd, ee, aa, bb, cc, F2, K2, in[15],  7);
+	ROUND(cc, dd, ee, aa, bb, F2, K2, in[3],  15);
+	ROUND(bb, cc, dd, ee, aa, F2, K2, in[12],  7);
+	ROUND(aa, bb, cc, dd, ee, F2, K2, in[0],  12);
+	ROUND(ee, aa, bb, cc, dd, F2, K2, in[9],  15);
+	ROUND(dd, ee, aa, bb, cc, F2, K2, in[5],   9);
+	ROUND(cc, dd, ee, aa, bb, F2, K2, in[2],  11);
+	ROUND(bb, cc, dd, ee, aa, F2, K2, in[14],  7);
+	ROUND(aa, bb, cc, dd, ee, F2, K2, in[11], 13);
+	ROUND(ee, aa, bb, cc, dd, F2, K2, in[8],  12);
+
+	/* round 3: left lane" */
+	ROUND(dd, ee, aa, bb, cc, F3, K3, in[3],  11);
+	ROUND(cc, dd, ee, aa, bb, F3, K3, in[10], 13);
+	ROUND(bb, cc, dd, ee, aa, F3, K3, in[14],  6);
+	ROUND(aa, bb, cc, dd, ee, F3, K3, in[4],   7);
+	ROUND(ee, aa, bb, cc, dd, F3, K3, in[9],  14);
+	ROUND(dd, ee, aa, bb, cc, F3, K3, in[15],  9);
+	ROUND(cc, dd, ee, aa, bb, F3, K3, in[8],  13);
+	ROUND(bb, cc, dd, ee, aa, F3, K3, in[1],  15);
+	ROUND(aa, bb, cc, dd, ee, F3, K3, in[2],  14);
+	ROUND(ee, aa, bb, cc, dd, F3, K3, in[7],   8);
+	ROUND(dd, ee, aa, bb, cc, F3, K3, in[0],  13);
+	ROUND(cc, dd, ee, aa, bb, F3, K3, in[6],   6);
+	ROUND(bb, cc, dd, ee, aa, F3, K3, in[13],  5);
+	ROUND(aa, bb, cc, dd, ee, F3, K3, in[11], 12);
+	ROUND(ee, aa, bb, cc, dd, F3, K3, in[5],   7);
+	ROUND(dd, ee, aa, bb, cc, F3, K3, in[12],  5);
+
+	/* round 4: left lane" */
+	ROUND(cc, dd, ee, aa, bb, F4, K4, in[1],  11);
+	ROUND(bb, cc, dd, ee, aa, F4, K4, in[9],  12);
+	ROUND(aa, bb, cc, dd, ee, F4, K4, in[11], 14);
+	ROUND(ee, aa, bb, cc, dd, F4, K4, in[10], 15);
+	ROUND(dd, ee, aa, bb, cc, F4, K4, in[0],  14);
+	ROUND(cc, dd, ee, aa, bb, F4, K4, in[8],  15);
+	ROUND(bb, cc, dd, ee, aa, F4, K4, in[12],  9);
+	ROUND(aa, bb, cc, dd, ee, F4, K4, in[4],   8);
+	ROUND(ee, aa, bb, cc, dd, F4, K4, in[13],  9);
+	ROUND(dd, ee, aa, bb, cc, F4, K4, in[3],  14);
+	ROUND(cc, dd, ee, aa, bb, F4, K4, in[7],   5);
+	ROUND(bb, cc, dd, ee, aa, F4, K4, in[15],  6);
+	ROUND(aa, bb, cc, dd, ee, F4, K4, in[14],  8);
+	ROUND(ee, aa, bb, cc, dd, F4, K4, in[5],   6);
+	ROUND(dd, ee, aa, bb, cc, F4, K4, in[6],   5);
+	ROUND(cc, dd, ee, aa, bb, F4, K4, in[2],  12);
+
+	/* round 5: left lane" */
+	ROUND(bb, cc, dd, ee, aa, F5, K5, in[4],   9);
+	ROUND(aa, bb, cc, dd, ee, F5, K5, in[0],  15);
+	ROUND(ee, aa, bb, cc, dd, F5, K5, in[5],   5);
+	ROUND(dd, ee, aa, bb, cc, F5, K5, in[9],  11);
+	ROUND(cc, dd, ee, aa, bb, F5, K5, in[7],   6);
+	ROUND(bb, cc, dd, ee, aa, F5, K5, in[12],  8);
+	ROUND(aa, bb, cc, dd, ee, F5, K5, in[2],  13);
+	ROUND(ee, aa, bb, cc, dd, F5, K5, in[10], 12);
+	ROUND(dd, ee, aa, bb, cc, F5, K5, in[14],  5);
+	ROUND(cc, dd, ee, aa, bb, F5, K5, in[1],  12);
+	ROUND(bb, cc, dd, ee, aa, F5, K5, in[3],  13);
+	ROUND(aa, bb, cc, dd, ee, F5, K5, in[8],  14);
+	ROUND(ee, aa, bb, cc, dd, F5, K5, in[11], 11);
+	ROUND(dd, ee, aa, bb, cc, F5, K5, in[6],   8);
+	ROUND(cc, dd, ee, aa, bb, F5, K5, in[15],  5);
+	ROUND(bb, cc, dd, ee, aa, F5, K5, in[13],  6);
+
+	/* round 1: right lane */
+	ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[5],   8);
+	ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[14],  9);
+	ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[7],   9);
+	ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[0],  11);
+	ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[9],  13);
+	ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[2],  15);
+	ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[11], 15);
+	ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[4],   5);
+	ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[13],  7);
+	ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[6],   7);
+	ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[15],  8);
+	ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[8],  11);
+	ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[1],  14);
+	ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[10], 14);
+	ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[3],  12);
+	ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[12],  6);
+
+	/* round 2: right lane */
+	ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[6],   9);
+	ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[11], 13);
+	ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[3],  15);
+	ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[7],   7);
+	ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[0],  12);
+	ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[13],  8);
+	ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[5],   9);
+	ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[10], 11);
+	ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[14],  7);
+	ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[15],  7);
+	ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[8],  12);
+	ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[12],  7);
+	ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[4],   6);
+	ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[9],  15);
+	ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[1],  13);
+	ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[2],  11);
+
+	/* round 3: right lane */
+	ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[15],  9);
+	ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[5],   7);
+	ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[1],  15);
+	ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[3],  11);
+	ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[7],   8);
+	ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[14],  6);
+	ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[6],   6);
+	ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[9],  14);
+	ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[11], 12);
+	ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[8],  13);
+	ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[12],  5);
+	ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[2],  14);
+	ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[10], 13);
+	ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[0],  13);
+	ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[4],   7);
+	ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[13],  5);
+
+	/* round 4: right lane */
+	ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[8],  15);
+	ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[6],   5);
+	ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[4],   8);
+	ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[1],  11);
+	ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[3],  14);
+	ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[11], 14);
+	ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[15],  6);
+	ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[0],  14);
+	ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[5],   6);
+	ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[12],  9);
+	ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[2],  12);
+	ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[13],  9);
+	ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[9],  12);
+	ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[7],   5);
+	ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[10], 15);
+	ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[14],  8);
+
+	/* round 5: right lane */
+	ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[12],  8);
+	ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[15],  5);
+	ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[10], 12);
+	ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[4],   9);
+	ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[1],  12);
+	ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[5],   5);
+	ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[8],  14);
+	ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[7],   6);
+	ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[6],   8);
+	ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[2],  13);
+	ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[13],  6);
+	ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[14],  5);
+	ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[0],  15);
+	ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[3],  13);
+	ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[9],  11);
+	ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[11], 11);
+
+	/* combine results */
+	ddd += cc + state[1];		/* final result for state[0] */
+	state[1] = state[2] + dd + eee;
+	state[2] = state[3] + ee + aaa;
+	state[3] = state[4] + aa + bbb;
+	state[4] = state[0] + bb + ccc;
+	state[0] = ddd;
+
+	return;
+}
+
+static int rmd160_init(struct shash_desc *desc)
+{
+	struct rmd160_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;
+	rctx->state[4] = RMD_H4;
+
+	memset(rctx->buffer, 0, sizeof(rctx->buffer));
+
+	return 0;
+}
+
+static int rmd160_update(struct shash_desc *desc, const u8 *data,
+			 unsigned int len)
+{
+	struct rmd160_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);
+
+	rmd160_transform(rctx->state, rctx->buffer);
+	data += avail;
+	len -= avail;
+
+	while (len >= sizeof(rctx->buffer)) {
+		memcpy(rctx->buffer, data, sizeof(rctx->buffer));
+		rmd160_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 rmd160_final(struct shash_desc *desc, u8 *out)
+{
+	struct rmd160_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);
+	rmd160_update(desc, padding, padlen);
+
+	/* Append length */
+	rmd160_update(desc, (const u8 *)&bits, sizeof(bits));
+
+	/* Store state in digest */
+	for (i = 0; i < 5; i++)
+		dst[i] = cpu_to_le32p(&rctx->state[i]);
+
+	/* Wipe context */
+	memset(rctx, 0, sizeof(*rctx));
+
+	return 0;
+}
+
+static struct shash_alg alg = {
+	.digestsize	=	RMD160_DIGEST_SIZE,
+	.init		=	rmd160_init,
+	.update		=	rmd160_update,
+	.final		=	rmd160_final,
+	.descsize	=	sizeof(struct rmd160_ctx),
+	.base		=	{
+		.cra_name	 =	"rmd160",
+		.cra_flags	 =	CRYPTO_ALG_TYPE_SHASH,
+		.cra_blocksize	 =	RMD160_BLOCK_SIZE,
+		.cra_module	 =	THIS_MODULE,
+	}
+};
+
+static int __init rmd160_mod_init(void)
+{
+	return crypto_register_shash(&alg);
+}
+
+static void __exit rmd160_mod_fini(void)
+{
+	crypto_unregister_shash(&alg);
+}
+
+module_init(rmd160_mod_init);
+module_exit(rmd160_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
+MODULE_DESCRIPTION("RIPEMD-160 Message Digest");
+MODULE_ALIAS_CRYPTO("rmd160");