470 lines
15 KiB
C
470 lines
15 KiB
C
/* $NetBSD: rmd160.c,v 1.1.1.1 2003/03/31 05:02:55 grant Exp $ */
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/********************************************************************\
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*
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* FILE: rmd160.c
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*
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* CONTENTS: A sample C-implementation of the RIPEMD-160
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* hash-function.
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* TARGET: any computer with an ANSI C compiler
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*
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* AUTHOR: Antoon Bosselaers, ESAT-COSIC
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* (Arranged for libc by Todd C. Miller)
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* DATE: 1 March 1996
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* VERSION: 1.0
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*
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* Copyright (c) Katholieke Universiteit Leuven
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* 1996, All Rights Reserved
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*
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\********************************************************************/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <nbtypes.h>
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#ifndef lint
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__RCSID("$NetBSD: rmd160.c,v 1.1.1.1 2003/03/31 05:02:55 grant Exp $");
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#endif /* not lint */
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/* header files */
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/* #include "namespace.h" */
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#include <assert.h>
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#include <rmd160.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifndef _DIAGASSERT
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#define _DIAGASSERT(cond) assert(cond)
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#endif
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#if defined(HAVE_MEMSET)
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#define ZEROIZE(d, l) memset((d), 0, (l))
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#else
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# if defined(HAVE_BZERO)
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#define ZEROIZE(d, l) bzero((d), (l))
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# else
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#error You need either memset or bzero
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# endif
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#endif
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#if 0
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#if !defined(_KERNEL) && defined(__weak_alias)
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__weak_alias(RMD160Transform,_RMD160Transform)
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__weak_alias(RMD160Init,_RMD160Init)
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__weak_alias(RMD160Update,_RMD160Update)
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__weak_alias(RMD160Final,_RMD160Final)
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#endif
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#endif
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/********************************************************************/
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/* macro definitions */
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/* collect four bytes into one word: */
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#define BYTES_TO_DWORD(strptr) \
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(((u_int32_t) *((strptr)+3) << 24) | \
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((u_int32_t) *((strptr)+2) << 16) | \
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((u_int32_t) *((strptr)+1) << 8) | \
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((u_int32_t) *(strptr)))
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/* ROL(x, n) cyclically rotates x over n bits to the left */
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/* x must be of an unsigned 32 bits type and 0 <= n < 32. */
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#define ROL(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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/* the three basic functions F(), G() and H() */
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#define F(x, y, z) ((x) ^ (y) ^ (z))
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#define G(x, y, z) (((x) & (y)) | (~(x) & (z)))
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#define H(x, y, z) (((x) | ~(y)) ^ (z))
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#define I(x, y, z) (((x) & (z)) | ((y) & ~(z)))
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#define J(x, y, z) ((x) ^ ((y) | ~(z)))
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/* the eight basic operations FF() through III() */
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#define FF(a, b, c, d, e, x, s) { \
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(a) += F((b), (c), (d)) + (x); \
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(a) = ROL((a), (s)) + (e); \
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(c) = ROL((c), 10); \
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}
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#define GG(a, b, c, d, e, x, s) { \
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(a) += G((b), (c), (d)) + (x) + 0x5a827999U; \
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(a) = ROL((a), (s)) + (e); \
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(c) = ROL((c), 10); \
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}
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#define HH(a, b, c, d, e, x, s) { \
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(a) += H((b), (c), (d)) + (x) + 0x6ed9eba1U; \
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(a) = ROL((a), (s)) + (e); \
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(c) = ROL((c), 10); \
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}
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#define II(a, b, c, d, e, x, s) { \
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(a) += I((b), (c), (d)) + (x) + 0x8f1bbcdcU; \
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(a) = ROL((a), (s)) + (e); \
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(c) = ROL((c), 10); \
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}
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#define JJ(a, b, c, d, e, x, s) { \
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(a) += J((b), (c), (d)) + (x) + 0xa953fd4eU; \
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(a) = ROL((a), (s)) + (e); \
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(c) = ROL((c), 10); \
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}
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#define FFF(a, b, c, d, e, x, s) { \
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(a) += F((b), (c), (d)) + (x); \
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(a) = ROL((a), (s)) + (e); \
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(c) = ROL((c), 10); \
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}
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#define GGG(a, b, c, d, e, x, s) { \
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(a) += G((b), (c), (d)) + (x) + 0x7a6d76e9U; \
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(a) = ROL((a), (s)) + (e); \
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(c) = ROL((c), 10); \
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}
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#define HHH(a, b, c, d, e, x, s) { \
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(a) += H((b), (c), (d)) + (x) + 0x6d703ef3U; \
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(a) = ROL((a), (s)) + (e); \
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(c) = ROL((c), 10); \
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}
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#define III(a, b, c, d, e, x, s) { \
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(a) += I((b), (c), (d)) + (x) + 0x5c4dd124U; \
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(a) = ROL((a), (s)) + (e); \
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(c) = ROL((c), 10); \
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}
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#define JJJ(a, b, c, d, e, x, s) { \
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(a) += J((b), (c), (d)) + (x) + 0x50a28be6U; \
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(a) = ROL((a), (s)) + (e); \
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(c) = ROL((c), 10); \
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}
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/********************************************************************/
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void
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RMD160Init(RMD160_CTX *context)
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{
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_DIAGASSERT(context != NULL);
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/* ripemd-160 initialization constants */
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context->state[0] = 0x67452301U;
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context->state[1] = 0xefcdab89U;
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context->state[2] = 0x98badcfeU;
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context->state[3] = 0x10325476U;
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context->state[4] = 0xc3d2e1f0U;
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context->length[0] = context->length[1] = 0;
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context->buflen = 0;
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}
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/********************************************************************/
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void
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RMD160Transform(u_int32_t state[5], const u_int32_t block[16])
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{
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u_int32_t aa, bb, cc, dd, ee;
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u_int32_t aaa, bbb, ccc, ddd, eee;
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_DIAGASSERT(state != NULL);
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_DIAGASSERT(block != NULL);
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aa = aaa = state[0];
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bb = bbb = state[1];
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cc = ccc = state[2];
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dd = ddd = state[3];
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ee = eee = state[4];
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/* round 1 */
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FF(aa, bb, cc, dd, ee, block[ 0], 11);
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FF(ee, aa, bb, cc, dd, block[ 1], 14);
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FF(dd, ee, aa, bb, cc, block[ 2], 15);
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FF(cc, dd, ee, aa, bb, block[ 3], 12);
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FF(bb, cc, dd, ee, aa, block[ 4], 5);
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FF(aa, bb, cc, dd, ee, block[ 5], 8);
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FF(ee, aa, bb, cc, dd, block[ 6], 7);
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FF(dd, ee, aa, bb, cc, block[ 7], 9);
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FF(cc, dd, ee, aa, bb, block[ 8], 11);
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FF(bb, cc, dd, ee, aa, block[ 9], 13);
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FF(aa, bb, cc, dd, ee, block[10], 14);
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FF(ee, aa, bb, cc, dd, block[11], 15);
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FF(dd, ee, aa, bb, cc, block[12], 6);
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FF(cc, dd, ee, aa, bb, block[13], 7);
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FF(bb, cc, dd, ee, aa, block[14], 9);
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FF(aa, bb, cc, dd, ee, block[15], 8);
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/* round 2 */
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GG(ee, aa, bb, cc, dd, block[ 7], 7);
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GG(dd, ee, aa, bb, cc, block[ 4], 6);
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GG(cc, dd, ee, aa, bb, block[13], 8);
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GG(bb, cc, dd, ee, aa, block[ 1], 13);
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GG(aa, bb, cc, dd, ee, block[10], 11);
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GG(ee, aa, bb, cc, dd, block[ 6], 9);
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GG(dd, ee, aa, bb, cc, block[15], 7);
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GG(cc, dd, ee, aa, bb, block[ 3], 15);
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GG(bb, cc, dd, ee, aa, block[12], 7);
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GG(aa, bb, cc, dd, ee, block[ 0], 12);
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GG(ee, aa, bb, cc, dd, block[ 9], 15);
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GG(dd, ee, aa, bb, cc, block[ 5], 9);
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GG(cc, dd, ee, aa, bb, block[ 2], 11);
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GG(bb, cc, dd, ee, aa, block[14], 7);
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GG(aa, bb, cc, dd, ee, block[11], 13);
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GG(ee, aa, bb, cc, dd, block[ 8], 12);
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/* round 3 */
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HH(dd, ee, aa, bb, cc, block[ 3], 11);
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HH(cc, dd, ee, aa, bb, block[10], 13);
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HH(bb, cc, dd, ee, aa, block[14], 6);
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HH(aa, bb, cc, dd, ee, block[ 4], 7);
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HH(ee, aa, bb, cc, dd, block[ 9], 14);
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HH(dd, ee, aa, bb, cc, block[15], 9);
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HH(cc, dd, ee, aa, bb, block[ 8], 13);
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HH(bb, cc, dd, ee, aa, block[ 1], 15);
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HH(aa, bb, cc, dd, ee, block[ 2], 14);
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HH(ee, aa, bb, cc, dd, block[ 7], 8);
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HH(dd, ee, aa, bb, cc, block[ 0], 13);
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HH(cc, dd, ee, aa, bb, block[ 6], 6);
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HH(bb, cc, dd, ee, aa, block[13], 5);
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HH(aa, bb, cc, dd, ee, block[11], 12);
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HH(ee, aa, bb, cc, dd, block[ 5], 7);
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HH(dd, ee, aa, bb, cc, block[12], 5);
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/* round 4 */
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II(cc, dd, ee, aa, bb, block[ 1], 11);
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II(bb, cc, dd, ee, aa, block[ 9], 12);
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II(aa, bb, cc, dd, ee, block[11], 14);
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II(ee, aa, bb, cc, dd, block[10], 15);
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II(dd, ee, aa, bb, cc, block[ 0], 14);
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II(cc, dd, ee, aa, bb, block[ 8], 15);
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II(bb, cc, dd, ee, aa, block[12], 9);
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II(aa, bb, cc, dd, ee, block[ 4], 8);
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II(ee, aa, bb, cc, dd, block[13], 9);
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II(dd, ee, aa, bb, cc, block[ 3], 14);
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II(cc, dd, ee, aa, bb, block[ 7], 5);
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II(bb, cc, dd, ee, aa, block[15], 6);
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II(aa, bb, cc, dd, ee, block[14], 8);
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II(ee, aa, bb, cc, dd, block[ 5], 6);
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II(dd, ee, aa, bb, cc, block[ 6], 5);
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II(cc, dd, ee, aa, bb, block[ 2], 12);
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/* round 5 */
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JJ(bb, cc, dd, ee, aa, block[ 4], 9);
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JJ(aa, bb, cc, dd, ee, block[ 0], 15);
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JJ(ee, aa, bb, cc, dd, block[ 5], 5);
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JJ(dd, ee, aa, bb, cc, block[ 9], 11);
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JJ(cc, dd, ee, aa, bb, block[ 7], 6);
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JJ(bb, cc, dd, ee, aa, block[12], 8);
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JJ(aa, bb, cc, dd, ee, block[ 2], 13);
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JJ(ee, aa, bb, cc, dd, block[10], 12);
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JJ(dd, ee, aa, bb, cc, block[14], 5);
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JJ(cc, dd, ee, aa, bb, block[ 1], 12);
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JJ(bb, cc, dd, ee, aa, block[ 3], 13);
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JJ(aa, bb, cc, dd, ee, block[ 8], 14);
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JJ(ee, aa, bb, cc, dd, block[11], 11);
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JJ(dd, ee, aa, bb, cc, block[ 6], 8);
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JJ(cc, dd, ee, aa, bb, block[15], 5);
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JJ(bb, cc, dd, ee, aa, block[13], 6);
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/* parallel round 1 */
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JJJ(aaa, bbb, ccc, ddd, eee, block[ 5], 8);
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JJJ(eee, aaa, bbb, ccc, ddd, block[14], 9);
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JJJ(ddd, eee, aaa, bbb, ccc, block[ 7], 9);
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JJJ(ccc, ddd, eee, aaa, bbb, block[ 0], 11);
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JJJ(bbb, ccc, ddd, eee, aaa, block[ 9], 13);
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JJJ(aaa, bbb, ccc, ddd, eee, block[ 2], 15);
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JJJ(eee, aaa, bbb, ccc, ddd, block[11], 15);
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JJJ(ddd, eee, aaa, bbb, ccc, block[ 4], 5);
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JJJ(ccc, ddd, eee, aaa, bbb, block[13], 7);
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JJJ(bbb, ccc, ddd, eee, aaa, block[ 6], 7);
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JJJ(aaa, bbb, ccc, ddd, eee, block[15], 8);
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JJJ(eee, aaa, bbb, ccc, ddd, block[ 8], 11);
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JJJ(ddd, eee, aaa, bbb, ccc, block[ 1], 14);
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JJJ(ccc, ddd, eee, aaa, bbb, block[10], 14);
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JJJ(bbb, ccc, ddd, eee, aaa, block[ 3], 12);
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JJJ(aaa, bbb, ccc, ddd, eee, block[12], 6);
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/* parallel round 2 */
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III(eee, aaa, bbb, ccc, ddd, block[ 6], 9);
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III(ddd, eee, aaa, bbb, ccc, block[11], 13);
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III(ccc, ddd, eee, aaa, bbb, block[ 3], 15);
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III(bbb, ccc, ddd, eee, aaa, block[ 7], 7);
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III(aaa, bbb, ccc, ddd, eee, block[ 0], 12);
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III(eee, aaa, bbb, ccc, ddd, block[13], 8);
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III(ddd, eee, aaa, bbb, ccc, block[ 5], 9);
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III(ccc, ddd, eee, aaa, bbb, block[10], 11);
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III(bbb, ccc, ddd, eee, aaa, block[14], 7);
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III(aaa, bbb, ccc, ddd, eee, block[15], 7);
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III(eee, aaa, bbb, ccc, ddd, block[ 8], 12);
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III(ddd, eee, aaa, bbb, ccc, block[12], 7);
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III(ccc, ddd, eee, aaa, bbb, block[ 4], 6);
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III(bbb, ccc, ddd, eee, aaa, block[ 9], 15);
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III(aaa, bbb, ccc, ddd, eee, block[ 1], 13);
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III(eee, aaa, bbb, ccc, ddd, block[ 2], 11);
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/* parallel round 3 */
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HHH(ddd, eee, aaa, bbb, ccc, block[15], 9);
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HHH(ccc, ddd, eee, aaa, bbb, block[ 5], 7);
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HHH(bbb, ccc, ddd, eee, aaa, block[ 1], 15);
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HHH(aaa, bbb, ccc, ddd, eee, block[ 3], 11);
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HHH(eee, aaa, bbb, ccc, ddd, block[ 7], 8);
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HHH(ddd, eee, aaa, bbb, ccc, block[14], 6);
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HHH(ccc, ddd, eee, aaa, bbb, block[ 6], 6);
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HHH(bbb, ccc, ddd, eee, aaa, block[ 9], 14);
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HHH(aaa, bbb, ccc, ddd, eee, block[11], 12);
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HHH(eee, aaa, bbb, ccc, ddd, block[ 8], 13);
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HHH(ddd, eee, aaa, bbb, ccc, block[12], 5);
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HHH(ccc, ddd, eee, aaa, bbb, block[ 2], 14);
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HHH(bbb, ccc, ddd, eee, aaa, block[10], 13);
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HHH(aaa, bbb, ccc, ddd, eee, block[ 0], 13);
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HHH(eee, aaa, bbb, ccc, ddd, block[ 4], 7);
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HHH(ddd, eee, aaa, bbb, ccc, block[13], 5);
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/* parallel round 4 */
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GGG(ccc, ddd, eee, aaa, bbb, block[ 8], 15);
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GGG(bbb, ccc, ddd, eee, aaa, block[ 6], 5);
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GGG(aaa, bbb, ccc, ddd, eee, block[ 4], 8);
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GGG(eee, aaa, bbb, ccc, ddd, block[ 1], 11);
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GGG(ddd, eee, aaa, bbb, ccc, block[ 3], 14);
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GGG(ccc, ddd, eee, aaa, bbb, block[11], 14);
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GGG(bbb, ccc, ddd, eee, aaa, block[15], 6);
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GGG(aaa, bbb, ccc, ddd, eee, block[ 0], 14);
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GGG(eee, aaa, bbb, ccc, ddd, block[ 5], 6);
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GGG(ddd, eee, aaa, bbb, ccc, block[12], 9);
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GGG(ccc, ddd, eee, aaa, bbb, block[ 2], 12);
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GGG(bbb, ccc, ddd, eee, aaa, block[13], 9);
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GGG(aaa, bbb, ccc, ddd, eee, block[ 9], 12);
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GGG(eee, aaa, bbb, ccc, ddd, block[ 7], 5);
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GGG(ddd, eee, aaa, bbb, ccc, block[10], 15);
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GGG(ccc, ddd, eee, aaa, bbb, block[14], 8);
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/* parallel round 5 */
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FFF(bbb, ccc, ddd, eee, aaa, block[12] , 8);
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FFF(aaa, bbb, ccc, ddd, eee, block[15] , 5);
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FFF(eee, aaa, bbb, ccc, ddd, block[10] , 12);
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FFF(ddd, eee, aaa, bbb, ccc, block[ 4] , 9);
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FFF(ccc, ddd, eee, aaa, bbb, block[ 1] , 12);
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FFF(bbb, ccc, ddd, eee, aaa, block[ 5] , 5);
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FFF(aaa, bbb, ccc, ddd, eee, block[ 8] , 14);
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FFF(eee, aaa, bbb, ccc, ddd, block[ 7] , 6);
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FFF(ddd, eee, aaa, bbb, ccc, block[ 6] , 8);
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FFF(ccc, ddd, eee, aaa, bbb, block[ 2] , 13);
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FFF(bbb, ccc, ddd, eee, aaa, block[13] , 6);
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FFF(aaa, bbb, ccc, ddd, eee, block[14] , 5);
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FFF(eee, aaa, bbb, ccc, ddd, block[ 0] , 15);
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FFF(ddd, eee, aaa, bbb, ccc, block[ 3] , 13);
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FFF(ccc, ddd, eee, aaa, bbb, block[ 9] , 11);
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FFF(bbb, ccc, ddd, eee, aaa, block[11] , 11);
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/* combine results */
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ddd += cc + state[1]; /* final result for state[0] */
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state[1] = state[2] + dd + eee;
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state[2] = state[3] + ee + aaa;
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state[3] = state[4] + aa + bbb;
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state[4] = state[0] + bb + ccc;
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state[0] = ddd;
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}
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/********************************************************************/
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void
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RMD160Update(RMD160_CTX *context, const u_char *data, u_int32_t nbytes)
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{
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u_int32_t X[16];
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u_int32_t ofs = 0;
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u_int32_t i;
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#if BYTE_ORDER != LITTLE_ENDIAN
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u_int32_t j;
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#endif
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_DIAGASSERT(context != NULL);
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_DIAGASSERT(data != NULL);
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/* update length[] */
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if (context->length[0] + nbytes < context->length[0])
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context->length[1]++; /* overflow to msb of length */
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context->length[0] += nbytes;
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ZEROIZE(X, sizeof(X));
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if ( context->buflen + nbytes < 64 )
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{
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(void)memcpy(context->bbuffer + context->buflen, data, nbytes);
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context->buflen += nbytes;
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}
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else
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{
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/* process first block */
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ofs = 64 - context->buflen;
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(void)memcpy(context->bbuffer + context->buflen, data, ofs);
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#if BYTE_ORDER == LITTLE_ENDIAN
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(void)memcpy(X, context->bbuffer, sizeof(X));
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#else
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for (j=0; j < 16; j++)
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X[j] = BYTES_TO_DWORD(context->bbuffer + (4 * j));
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#endif
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RMD160Transform(context->state, X);
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nbytes -= ofs;
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|
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/* process remaining complete blocks */
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for (i = 0; i < (nbytes >> 6); i++) {
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#if BYTE_ORDER == LITTLE_ENDIAN
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(void)memcpy(X, data + (64 * i) + ofs, sizeof(X));
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#else
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for (j=0; j < 16; j++)
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X[j] = BYTES_TO_DWORD(data + (64 * i) + (4 * j) + ofs);
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#endif
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RMD160Transform(context->state, X);
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}
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|
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/*
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* Put last bytes from data into context's buffer
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*/
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context->buflen = nbytes & 63;
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memcpy(context->bbuffer, data + (64 * i) + ofs, context->buflen);
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}
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}
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|
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/********************************************************************/
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|
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|
void
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|
RMD160Final(u_char digest[20], RMD160_CTX *context)
|
|
{
|
|
u_int32_t i;
|
|
u_int32_t X[16];
|
|
#if BYTE_ORDER != LITTLE_ENDIAN
|
|
u_int32_t j;
|
|
#endif
|
|
|
|
_DIAGASSERT(digest != NULL);
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|
_DIAGASSERT(context != NULL);
|
|
|
|
/* append the bit m_n == 1 */
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|
context->bbuffer[context->buflen] = (u_char)'\200';
|
|
|
|
ZEROIZE(context->bbuffer + context->buflen + 1,
|
|
63 - context->buflen);
|
|
#if BYTE_ORDER == LITTLE_ENDIAN
|
|
(void)memcpy(X, context->bbuffer, sizeof(X));
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|
#else
|
|
for (j=0; j < 16; j++)
|
|
X[j] = BYTES_TO_DWORD(context->bbuffer + (4 * j));
|
|
#endif
|
|
if ((context->buflen) > 55) {
|
|
/* length goes to next block */
|
|
RMD160Transform(context->state, X);
|
|
ZEROIZE(X, sizeof(X));
|
|
}
|
|
|
|
/* append length in bits */
|
|
X[14] = context->length[0] << 3;
|
|
X[15] = (context->length[0] >> 29) |
|
|
(context->length[1] << 3);
|
|
RMD160Transform(context->state, X);
|
|
|
|
if (digest != NULL) {
|
|
for (i = 0; i < 20; i += 4) {
|
|
/* extracts the 8 least significant bits. */
|
|
digest[i] = context->state[i>>2];
|
|
digest[i + 1] = (context->state[i>>2] >> 8);
|
|
digest[i + 2] = (context->state[i>>2] >> 16);
|
|
digest[i + 3] = (context->state[i>>2] >> 24);
|
|
}
|
|
}
|
|
}
|
|
|
|
/************************ end of file rmd160.c **********************/
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