364 lines
11 KiB
C
364 lines
11 KiB
C
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/*
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* Cryptographic API.
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*
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* RIPEMD-256 - RACE Integrity Primitives Evaluation Message Digest.
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*
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* Based on the reference implementation by Antoon Bosselaers, ESAT-COSIC
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*
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* Copyright (c) 2008 Adrian-Ken Rueegsegger <rueegsegger (at) swiss-it.ch>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/crypto.h>
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#include <linux/cryptohash.h>
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#include <linux/types.h>
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#include <asm/byteorder.h>
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#include "ripemd.h"
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struct rmd256_ctx {
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u64 byte_count;
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u32 state[8];
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u32 buffer[16];
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};
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#define K1 RMD_K1
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#define K2 RMD_K2
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#define K3 RMD_K3
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#define K4 RMD_K4
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#define KK1 RMD_K6
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#define KK2 RMD_K7
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#define KK3 RMD_K8
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#define KK4 RMD_K1
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#define F1(x, y, z) (x ^ y ^ z) /* XOR */
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#define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */
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#define F3(x, y, z) ((x | ~y) ^ z)
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#define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */
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#define ROUND(a, b, c, d, f, k, x, s) { \
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(a) += f((b), (c), (d)) + (x) + (k); \
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(a) = rol32((a), (s)); \
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}
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static void rmd256_transform(u32 *state, u32 const *in)
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{
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u32 aa, bb, cc, dd, aaa, bbb, ccc, ddd, tmp;
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/* Initialize left lane */
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aa = state[0];
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bb = state[1];
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cc = state[2];
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dd = state[3];
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/* Initialize right lane */
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aaa = state[4];
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bbb = state[5];
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ccc = state[6];
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ddd = state[7];
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/* round 1: left lane */
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ROUND(aa, bb, cc, dd, F1, K1, in[0], 11);
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ROUND(dd, aa, bb, cc, F1, K1, in[1], 14);
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ROUND(cc, dd, aa, bb, F1, K1, in[2], 15);
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ROUND(bb, cc, dd, aa, F1, K1, in[3], 12);
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ROUND(aa, bb, cc, dd, F1, K1, in[4], 5);
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ROUND(dd, aa, bb, cc, F1, K1, in[5], 8);
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ROUND(cc, dd, aa, bb, F1, K1, in[6], 7);
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ROUND(bb, cc, dd, aa, F1, K1, in[7], 9);
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ROUND(aa, bb, cc, dd, F1, K1, in[8], 11);
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ROUND(dd, aa, bb, cc, F1, K1, in[9], 13);
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ROUND(cc, dd, aa, bb, F1, K1, in[10], 14);
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ROUND(bb, cc, dd, aa, F1, K1, in[11], 15);
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ROUND(aa, bb, cc, dd, F1, K1, in[12], 6);
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ROUND(dd, aa, bb, cc, F1, K1, in[13], 7);
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ROUND(cc, dd, aa, bb, F1, K1, in[14], 9);
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ROUND(bb, cc, dd, aa, F1, K1, in[15], 8);
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/* round 1: right lane */
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ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[5], 8);
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ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[14], 9);
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ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[7], 9);
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ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[0], 11);
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ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[9], 13);
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ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[2], 15);
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ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[11], 15);
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ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[4], 5);
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ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[13], 7);
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ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[6], 7);
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ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[15], 8);
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ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[8], 11);
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ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[1], 14);
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ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[10], 14);
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ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[3], 12);
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ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[12], 6);
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/* Swap contents of "a" registers */
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tmp = aa; aa = aaa; aaa = tmp;
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/* round 2: left lane */
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ROUND(aa, bb, cc, dd, F2, K2, in[7], 7);
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ROUND(dd, aa, bb, cc, F2, K2, in[4], 6);
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ROUND(cc, dd, aa, bb, F2, K2, in[13], 8);
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ROUND(bb, cc, dd, aa, F2, K2, in[1], 13);
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ROUND(aa, bb, cc, dd, F2, K2, in[10], 11);
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ROUND(dd, aa, bb, cc, F2, K2, in[6], 9);
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ROUND(cc, dd, aa, bb, F2, K2, in[15], 7);
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ROUND(bb, cc, dd, aa, F2, K2, in[3], 15);
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ROUND(aa, bb, cc, dd, F2, K2, in[12], 7);
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ROUND(dd, aa, bb, cc, F2, K2, in[0], 12);
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ROUND(cc, dd, aa, bb, F2, K2, in[9], 15);
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ROUND(bb, cc, dd, aa, F2, K2, in[5], 9);
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ROUND(aa, bb, cc, dd, F2, K2, in[2], 11);
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ROUND(dd, aa, bb, cc, F2, K2, in[14], 7);
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ROUND(cc, dd, aa, bb, F2, K2, in[11], 13);
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ROUND(bb, cc, dd, aa, F2, K2, in[8], 12);
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/* round 2: right lane */
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ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[6], 9);
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ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[11], 13);
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ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[3], 15);
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ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[7], 7);
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ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[0], 12);
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ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[13], 8);
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ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[5], 9);
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ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[10], 11);
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ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[14], 7);
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ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[15], 7);
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ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[8], 12);
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ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[12], 7);
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ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[4], 6);
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ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[9], 15);
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ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[1], 13);
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ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[2], 11);
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/* Swap contents of "b" registers */
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tmp = bb; bb = bbb; bbb = tmp;
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/* round 3: left lane */
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ROUND(aa, bb, cc, dd, F3, K3, in[3], 11);
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ROUND(dd, aa, bb, cc, F3, K3, in[10], 13);
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ROUND(cc, dd, aa, bb, F3, K3, in[14], 6);
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ROUND(bb, cc, dd, aa, F3, K3, in[4], 7);
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ROUND(aa, bb, cc, dd, F3, K3, in[9], 14);
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ROUND(dd, aa, bb, cc, F3, K3, in[15], 9);
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ROUND(cc, dd, aa, bb, F3, K3, in[8], 13);
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ROUND(bb, cc, dd, aa, F3, K3, in[1], 15);
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ROUND(aa, bb, cc, dd, F3, K3, in[2], 14);
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ROUND(dd, aa, bb, cc, F3, K3, in[7], 8);
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ROUND(cc, dd, aa, bb, F3, K3, in[0], 13);
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ROUND(bb, cc, dd, aa, F3, K3, in[6], 6);
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ROUND(aa, bb, cc, dd, F3, K3, in[13], 5);
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ROUND(dd, aa, bb, cc, F3, K3, in[11], 12);
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ROUND(cc, dd, aa, bb, F3, K3, in[5], 7);
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ROUND(bb, cc, dd, aa, F3, K3, in[12], 5);
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/* round 3: right lane */
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ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[15], 9);
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ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[5], 7);
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ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[1], 15);
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ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[3], 11);
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ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[7], 8);
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ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[14], 6);
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ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[6], 6);
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ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[9], 14);
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ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[11], 12);
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ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[8], 13);
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ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[12], 5);
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ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[2], 14);
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ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[10], 13);
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ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[0], 13);
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ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[4], 7);
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ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[13], 5);
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/* Swap contents of "c" registers */
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tmp = cc; cc = ccc; ccc = tmp;
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/* round 4: left lane */
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ROUND(aa, bb, cc, dd, F4, K4, in[1], 11);
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ROUND(dd, aa, bb, cc, F4, K4, in[9], 12);
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ROUND(cc, dd, aa, bb, F4, K4, in[11], 14);
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ROUND(bb, cc, dd, aa, F4, K4, in[10], 15);
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ROUND(aa, bb, cc, dd, F4, K4, in[0], 14);
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ROUND(dd, aa, bb, cc, F4, K4, in[8], 15);
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ROUND(cc, dd, aa, bb, F4, K4, in[12], 9);
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ROUND(bb, cc, dd, aa, F4, K4, in[4], 8);
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ROUND(aa, bb, cc, dd, F4, K4, in[13], 9);
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ROUND(dd, aa, bb, cc, F4, K4, in[3], 14);
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ROUND(cc, dd, aa, bb, F4, K4, in[7], 5);
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ROUND(bb, cc, dd, aa, F4, K4, in[15], 6);
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ROUND(aa, bb, cc, dd, F4, K4, in[14], 8);
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ROUND(dd, aa, bb, cc, F4, K4, in[5], 6);
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ROUND(cc, dd, aa, bb, F4, K4, in[6], 5);
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ROUND(bb, cc, dd, aa, F4, K4, in[2], 12);
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/* round 4: right lane */
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ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[8], 15);
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ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[6], 5);
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ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[4], 8);
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ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[1], 11);
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ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[3], 14);
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ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[11], 14);
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ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[15], 6);
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ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[0], 14);
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ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[5], 6);
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ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[12], 9);
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ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[2], 12);
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ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[13], 9);
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ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[9], 12);
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ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[7], 5);
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ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[10], 15);
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ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[14], 8);
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/* Swap contents of "d" registers */
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tmp = dd; dd = ddd; ddd = tmp;
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/* combine results */
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state[0] += aa;
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state[1] += bb;
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state[2] += cc;
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state[3] += dd;
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state[4] += aaa;
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state[5] += bbb;
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state[6] += ccc;
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state[7] += ddd;
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return;
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}
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static inline void le32_to_cpu_array(u32 *buf, unsigned int words)
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{
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while (words--) {
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le32_to_cpus(buf);
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buf++;
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}
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}
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static inline void cpu_to_le32_array(u32 *buf, unsigned int words)
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{
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while (words--) {
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cpu_to_le32s(buf);
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buf++;
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}
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}
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static inline void rmd256_transform_helper(struct rmd256_ctx *ctx)
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{
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le32_to_cpu_array(ctx->buffer, sizeof(ctx->buffer) / sizeof(u32));
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rmd256_transform(ctx->state, ctx->buffer);
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}
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static void rmd256_init(struct crypto_tfm *tfm)
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{
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struct rmd256_ctx *rctx = crypto_tfm_ctx(tfm);
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rctx->byte_count = 0;
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rctx->state[0] = RMD_H0;
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rctx->state[1] = RMD_H1;
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rctx->state[2] = RMD_H2;
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rctx->state[3] = RMD_H3;
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rctx->state[4] = RMD_H5;
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rctx->state[5] = RMD_H6;
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rctx->state[6] = RMD_H7;
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rctx->state[7] = RMD_H8;
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memset(rctx->buffer, 0, sizeof(rctx->buffer));
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}
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static void rmd256_update(struct crypto_tfm *tfm, const u8 *data,
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unsigned int len)
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{
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struct rmd256_ctx *rctx = crypto_tfm_ctx(tfm);
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||
|
|
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");
|