crypto/rmd320.c



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/*
 * Cryptographic API.
 *
 * RIPEMD-320 - 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 rmd320_ctx {
	u64 byte_count;
	u32 state[10];
	__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 rmd320_transform(u32 *state, const __le32 *in)
{
	u32 aa, bb, cc, dd, ee, aaa, bbb, ccc, ddd, eee, tmp;

	/* Initialize left lane */
	aa = state[0];
	bb = state[1];
	cc = state[2];
	dd = state[3];
	ee = state[4];

	/* Initialize right lane */
	aaa = state[5];
	bbb = state[6];
	ccc = state[7];
	ddd = state[8];
	eee = state[9];

	/* 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 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);

	/* Swap contents of "a" registers */
	tmp = aa; aa = aaa; aaa = tmp;

	/* 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 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);

	/* Swap contents of "b" registers */
	tmp = bb; bb = bbb; bbb = tmp;

	/* 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 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);