368 lines
11 KiB
C
368 lines
11 KiB
C
/* $OpenBSD: rmd160.c,v 1.3 2001/09/26 21:40:13 markus Exp $ */
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/*-
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* Copyright (c) 2001 Markus Friedl. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Preneel, Bosselaers, Dobbertin, "The Cryptographic Hash Function RIPEMD-160",
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* RSA Laboratories, CryptoBytes, Volume 3, Number 2, Autumn 1997,
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* ftp://ftp.rsasecurity.com/pub/cryptobytes/crypto3n2.pdf
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/endian.h>
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#include <opencrypto/rmd160.h>
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#define PUT_64BIT_LE(cp, value) do { \
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(cp)[7] = (value) >> 56; \
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(cp)[6] = (value) >> 48; \
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(cp)[5] = (value) >> 40; \
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(cp)[4] = (value) >> 32; \
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(cp)[3] = (value) >> 24; \
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(cp)[2] = (value) >> 16; \
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(cp)[1] = (value) >> 8; \
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(cp)[0] = (value); } while (0)
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#define PUT_32BIT_LE(cp, value) do { \
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(cp)[3] = (value) >> 24; \
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(cp)[2] = (value) >> 16; \
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(cp)[1] = (value) >> 8; \
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(cp)[0] = (value); } while (0)
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#define H0 0x67452301U
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#define H1 0xEFCDAB89U
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#define H2 0x98BADCFEU
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#define H3 0x10325476U
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#define H4 0xC3D2E1F0U
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#define K0 0x00000000U
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#define K1 0x5A827999U
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#define K2 0x6ED9EBA1U
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#define K3 0x8F1BBCDCU
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#define K4 0xA953FD4EU
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#define KK0 0x50A28BE6U
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#define KK1 0x5C4DD124U
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#define KK2 0x6D703EF3U
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#define KK3 0x7A6D76E9U
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#define KK4 0x00000000U
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/* rotate x left n bits. */
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#define ROL(n, x) (((x) << (n)) | ((x) >> (32-(n))))
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#define F0(x, y, z) ((x) ^ (y) ^ (z))
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#define F1(x, y, z) (((x) & (y)) | ((~x) & (z)))
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#define F2(x, y, z) (((x) | (~y)) ^ (z))
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#define F3(x, y, z) (((x) & (z)) | ((y) & (~z)))
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#define F4(x, y, z) ((x) ^ ((y) | (~z)))
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#define R(a, b, c, d, e, Fj, Kj, sj, rj) \
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do { \
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a = ROL(sj, a + Fj(b,c,d) + X(rj) + Kj) + e; \
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c = ROL(10, c); \
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} while(0)
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#define X(i) x[i]
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static u_char PADDING[64] = {
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0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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void
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RMD160Init(RMD160_CTX *ctx)
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{
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ctx->count = 0;
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ctx->state[0] = H0;
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ctx->state[1] = H1;
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ctx->state[2] = H2;
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ctx->state[3] = H3;
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ctx->state[4] = H4;
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}
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void
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RMD160Update(RMD160_CTX *ctx, const u_char *input, u_int32_t len)
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{
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u_int32_t have, off, need;
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have = (ctx->count/8) % 64;
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need = 64 - have;
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ctx->count += 8 * len;
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off = 0;
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if (len >= need) {
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if (have) {
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memcpy(ctx->buffer + have, input, need);
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RMD160Transform(ctx->state, ctx->buffer);
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off = need;
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have = 0;
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}
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/* now the buffer is empty */
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while (off + 64 <= len) {
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RMD160Transform(ctx->state, input+off);
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off += 64;
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}
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}
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if (off < len)
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memcpy(ctx->buffer + have, input+off, len-off);
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}
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void
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RMD160Final(u_char digest[20], RMD160_CTX *ctx)
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{
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int i;
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u_char size[8];
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u_int32_t padlen;
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PUT_64BIT_LE(size, ctx->count);
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/*
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* pad to 64 byte blocks, at least one byte from PADDING plus 8 bytes
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* for the size
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*/
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padlen = 64 - ((ctx->count/8) % 64);
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if (padlen < 1 + 8)
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padlen += 64;
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RMD160Update(ctx, PADDING, padlen - 8); /* padlen - 8 <= 64 */
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RMD160Update(ctx, size, 8);
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if (digest != NULL)
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for (i = 0; i < 5; i++)
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PUT_32BIT_LE(digest + i*4, ctx->state[i]);
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memset(ctx, 0, sizeof (*ctx));
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}
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void
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RMD160Transform(u_int32_t state[5], const u_char block[64])
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{
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u_int32_t a, b, c, d, e, aa, bb, cc, dd, ee, t, x[16];
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#if BYTE_ORDER == LITTLE_ENDIAN
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memcpy(x, block, 64);
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#else
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int i;
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for (i = 0; i < 16; i++)
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x[i] = bswap32(*(const u_int32_t*)(block+i*4));
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#endif
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a = state[0];
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b = state[1];
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c = state[2];
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d = state[3];
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e = state[4];
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/* Round 1 */
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R(a, b, c, d, e, F0, K0, 11, 0);
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R(e, a, b, c, d, F0, K0, 14, 1);
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R(d, e, a, b, c, F0, K0, 15, 2);
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R(c, d, e, a, b, F0, K0, 12, 3);
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R(b, c, d, e, a, F0, K0, 5, 4);
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R(a, b, c, d, e, F0, K0, 8, 5);
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R(e, a, b, c, d, F0, K0, 7, 6);
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R(d, e, a, b, c, F0, K0, 9, 7);
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R(c, d, e, a, b, F0, K0, 11, 8);
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R(b, c, d, e, a, F0, K0, 13, 9);
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R(a, b, c, d, e, F0, K0, 14, 10);
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R(e, a, b, c, d, F0, K0, 15, 11);
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R(d, e, a, b, c, F0, K0, 6, 12);
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R(c, d, e, a, b, F0, K0, 7, 13);
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R(b, c, d, e, a, F0, K0, 9, 14);
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R(a, b, c, d, e, F0, K0, 8, 15); /* #15 */
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/* Round 2 */
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R(e, a, b, c, d, F1, K1, 7, 7);
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R(d, e, a, b, c, F1, K1, 6, 4);
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R(c, d, e, a, b, F1, K1, 8, 13);
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R(b, c, d, e, a, F1, K1, 13, 1);
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R(a, b, c, d, e, F1, K1, 11, 10);
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R(e, a, b, c, d, F1, K1, 9, 6);
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R(d, e, a, b, c, F1, K1, 7, 15);
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R(c, d, e, a, b, F1, K1, 15, 3);
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R(b, c, d, e, a, F1, K1, 7, 12);
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R(a, b, c, d, e, F1, K1, 12, 0);
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R(e, a, b, c, d, F1, K1, 15, 9);
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R(d, e, a, b, c, F1, K1, 9, 5);
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R(c, d, e, a, b, F1, K1, 11, 2);
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R(b, c, d, e, a, F1, K1, 7, 14);
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R(a, b, c, d, e, F1, K1, 13, 11);
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R(e, a, b, c, d, F1, K1, 12, 8); /* #31 */
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/* Round 3 */
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R(d, e, a, b, c, F2, K2, 11, 3);
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R(c, d, e, a, b, F2, K2, 13, 10);
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R(b, c, d, e, a, F2, K2, 6, 14);
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R(a, b, c, d, e, F2, K2, 7, 4);
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R(e, a, b, c, d, F2, K2, 14, 9);
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R(d, e, a, b, c, F2, K2, 9, 15);
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R(c, d, e, a, b, F2, K2, 13, 8);
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R(b, c, d, e, a, F2, K2, 15, 1);
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R(a, b, c, d, e, F2, K2, 14, 2);
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R(e, a, b, c, d, F2, K2, 8, 7);
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R(d, e, a, b, c, F2, K2, 13, 0);
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R(c, d, e, a, b, F2, K2, 6, 6);
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R(b, c, d, e, a, F2, K2, 5, 13);
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R(a, b, c, d, e, F2, K2, 12, 11);
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R(e, a, b, c, d, F2, K2, 7, 5);
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R(d, e, a, b, c, F2, K2, 5, 12); /* #47 */
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/* Round 4 */
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R(c, d, e, a, b, F3, K3, 11, 1);
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R(b, c, d, e, a, F3, K3, 12, 9);
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R(a, b, c, d, e, F3, K3, 14, 11);
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R(e, a, b, c, d, F3, K3, 15, 10);
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R(d, e, a, b, c, F3, K3, 14, 0);
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R(c, d, e, a, b, F3, K3, 15, 8);
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R(b, c, d, e, a, F3, K3, 9, 12);
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R(a, b, c, d, e, F3, K3, 8, 4);
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R(e, a, b, c, d, F3, K3, 9, 13);
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R(d, e, a, b, c, F3, K3, 14, 3);
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R(c, d, e, a, b, F3, K3, 5, 7);
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R(b, c, d, e, a, F3, K3, 6, 15);
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R(a, b, c, d, e, F3, K3, 8, 14);
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R(e, a, b, c, d, F3, K3, 6, 5);
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R(d, e, a, b, c, F3, K3, 5, 6);
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R(c, d, e, a, b, F3, K3, 12, 2); /* #63 */
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/* Round 5 */
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R(b, c, d, e, a, F4, K4, 9, 4);
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R(a, b, c, d, e, F4, K4, 15, 0);
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R(e, a, b, c, d, F4, K4, 5, 5);
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R(d, e, a, b, c, F4, K4, 11, 9);
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R(c, d, e, a, b, F4, K4, 6, 7);
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R(b, c, d, e, a, F4, K4, 8, 12);
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R(a, b, c, d, e, F4, K4, 13, 2);
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R(e, a, b, c, d, F4, K4, 12, 10);
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R(d, e, a, b, c, F4, K4, 5, 14);
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R(c, d, e, a, b, F4, K4, 12, 1);
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R(b, c, d, e, a, F4, K4, 13, 3);
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R(a, b, c, d, e, F4, K4, 14, 8);
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R(e, a, b, c, d, F4, K4, 11, 11);
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R(d, e, a, b, c, F4, K4, 8, 6);
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R(c, d, e, a, b, F4, K4, 5, 15);
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R(b, c, d, e, a, F4, K4, 6, 13); /* #79 */
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aa = a ; bb = b; cc = c; dd = d; ee = e;
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a = state[0];
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b = state[1];
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c = state[2];
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d = state[3];
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e = state[4];
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/* Parallel round 1 */
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R(a, b, c, d, e, F4, KK0, 8, 5);
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R(e, a, b, c, d, F4, KK0, 9, 14);
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R(d, e, a, b, c, F4, KK0, 9, 7);
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R(c, d, e, a, b, F4, KK0, 11, 0);
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R(b, c, d, e, a, F4, KK0, 13, 9);
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R(a, b, c, d, e, F4, KK0, 15, 2);
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R(e, a, b, c, d, F4, KK0, 15, 11);
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R(d, e, a, b, c, F4, KK0, 5, 4);
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R(c, d, e, a, b, F4, KK0, 7, 13);
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R(b, c, d, e, a, F4, KK0, 7, 6);
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R(a, b, c, d, e, F4, KK0, 8, 15);
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R(e, a, b, c, d, F4, KK0, 11, 8);
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R(d, e, a, b, c, F4, KK0, 14, 1);
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R(c, d, e, a, b, F4, KK0, 14, 10);
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R(b, c, d, e, a, F4, KK0, 12, 3);
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R(a, b, c, d, e, F4, KK0, 6, 12); /* #15 */
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/* Parallel round 2 */
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R(e, a, b, c, d, F3, KK1, 9, 6);
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R(d, e, a, b, c, F3, KK1, 13, 11);
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R(c, d, e, a, b, F3, KK1, 15, 3);
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R(b, c, d, e, a, F3, KK1, 7, 7);
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R(a, b, c, d, e, F3, KK1, 12, 0);
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R(e, a, b, c, d, F3, KK1, 8, 13);
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R(d, e, a, b, c, F3, KK1, 9, 5);
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R(c, d, e, a, b, F3, KK1, 11, 10);
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R(b, c, d, e, a, F3, KK1, 7, 14);
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R(a, b, c, d, e, F3, KK1, 7, 15);
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R(e, a, b, c, d, F3, KK1, 12, 8);
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R(d, e, a, b, c, F3, KK1, 7, 12);
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R(c, d, e, a, b, F3, KK1, 6, 4);
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R(b, c, d, e, a, F3, KK1, 15, 9);
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R(a, b, c, d, e, F3, KK1, 13, 1);
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R(e, a, b, c, d, F3, KK1, 11, 2); /* #31 */
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/* Parallel round 3 */
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R(d, e, a, b, c, F2, KK2, 9, 15);
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R(c, d, e, a, b, F2, KK2, 7, 5);
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R(b, c, d, e, a, F2, KK2, 15, 1);
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R(a, b, c, d, e, F2, KK2, 11, 3);
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R(e, a, b, c, d, F2, KK2, 8, 7);
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R(d, e, a, b, c, F2, KK2, 6, 14);
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R(c, d, e, a, b, F2, KK2, 6, 6);
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R(b, c, d, e, a, F2, KK2, 14, 9);
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R(a, b, c, d, e, F2, KK2, 12, 11);
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R(e, a, b, c, d, F2, KK2, 13, 8);
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R(d, e, a, b, c, F2, KK2, 5, 12);
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R(c, d, e, a, b, F2, KK2, 14, 2);
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R(b, c, d, e, a, F2, KK2, 13, 10);
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R(a, b, c, d, e, F2, KK2, 13, 0);
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R(e, a, b, c, d, F2, KK2, 7, 4);
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R(d, e, a, b, c, F2, KK2, 5, 13); /* #47 */
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/* Parallel round 4 */
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R(c, d, e, a, b, F1, KK3, 15, 8);
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R(b, c, d, e, a, F1, KK3, 5, 6);
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R(a, b, c, d, e, F1, KK3, 8, 4);
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R(e, a, b, c, d, F1, KK3, 11, 1);
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R(d, e, a, b, c, F1, KK3, 14, 3);
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R(c, d, e, a, b, F1, KK3, 14, 11);
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R(b, c, d, e, a, F1, KK3, 6, 15);
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R(a, b, c, d, e, F1, KK3, 14, 0);
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R(e, a, b, c, d, F1, KK3, 6, 5);
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R(d, e, a, b, c, F1, KK3, 9, 12);
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R(c, d, e, a, b, F1, KK3, 12, 2);
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R(b, c, d, e, a, F1, KK3, 9, 13);
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R(a, b, c, d, e, F1, KK3, 12, 9);
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R(e, a, b, c, d, F1, KK3, 5, 7);
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R(d, e, a, b, c, F1, KK3, 15, 10);
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R(c, d, e, a, b, F1, KK3, 8, 14); /* #63 */
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/* Parallel round 5 */
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R(b, c, d, e, a, F0, KK4, 8, 12);
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R(a, b, c, d, e, F0, KK4, 5, 15);
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R(e, a, b, c, d, F0, KK4, 12, 10);
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R(d, e, a, b, c, F0, KK4, 9, 4);
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R(c, d, e, a, b, F0, KK4, 12, 1);
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R(b, c, d, e, a, F0, KK4, 5, 5);
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R(a, b, c, d, e, F0, KK4, 14, 8);
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R(e, a, b, c, d, F0, KK4, 6, 7);
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R(d, e, a, b, c, F0, KK4, 8, 6);
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R(c, d, e, a, b, F0, KK4, 13, 2);
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R(b, c, d, e, a, F0, KK4, 6, 13);
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R(a, b, c, d, e, F0, KK4, 5, 14);
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R(e, a, b, c, d, F0, KK4, 15, 0);
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R(d, e, a, b, c, F0, KK4, 13, 3);
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R(c, d, e, a, b, F0, KK4, 11, 9);
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R(b, c, d, e, a, F0, KK4, 11, 11); /* #79 */
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|
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t = state[1] + cc + d;
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state[1] = state[2] + dd + e;
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state[2] = state[3] + ee + a;
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state[3] = state[4] + aa + b;
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state[4] = state[0] + bb + c;
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state[0] = t;
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}
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