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/* $OpenBSD: ip_rmd160.c,v 1.5 1998/09/09 22:34:28 janjaap Exp $ */
/********************************************************************\
*
* FILE: rmd160.c
*
* CONTENTS: A sample C-implementation of the RIPEMD-160
* hash-function.
* TARGET: any computer with an ANSI C compiler
*
* AUTHOR: Antoon Bosselaers, ESAT-COSIC
* (Arranged for libc by Todd C. Miller)
* DATE: 1 March 1996
* VERSION: 1.0
*
* Copyright (c) Katholieke Universiteit Leuven
* 1996, All Rights Reserved
*
\********************************************************************/
/* header files */
#include <sys/param.h>
#include <sys/systm.h>
#include <netinet/ip_rmd160.h>
/********************************************************************/
/* macro definitions */
/* collect four bytes into one word: */
#define BYTES_TO_DWORD(strptr) \
(((u_int32_t) *((strptr)+3) << 24) | \
((u_int32_t) *((strptr)+2) << 16) | \
((u_int32_t) *((strptr)+1) << 8) | \
((u_int32_t) *(strptr)))
/* ROL(x, n) cyclically rotates x over n bits to the left */
/* x must be of an unsigned 32 bits type and 0 <= n < 32. */
#define ROL(x, n) (((x) << (n)) | ((x) >> (32-(n))))
/* the three basic functions F(), G() and H() */
#define F(x, y, z) ((x) ^ (y) ^ (z))
#define G(x, y, z) (((x) & (y)) | (~(x) & (z)))
#define H(x, y, z) (((x) | ~(y)) ^ (z))
#define I(x, y, z) (((x) & (z)) | ((y) & ~(z)))
#define J(x, y, z) ((x) ^ ((y) | ~(z)))
/* the eight basic operations FF() through III() */
#define FF(a, b, c, d, e, x, s) { \
(a) += F((b), (c), (d)) + (x); \
(a) = ROL((a), (s)) + (e); \
(c) = ROL((c), 10); \
}
#define GG(a, b, c, d, e, x, s) { \
(a) += G((b), (c), (d)) + (x) + 0x5a827999U; \
(a) = ROL((a), (s)) + (e); \
(c) = ROL((c), 10); \
}
#define HH(a, b, c, d, e, x, s) { \
(a) += H((b), (c), (d)) + (x) + 0x6ed9eba1U; \
(a) = ROL((a), (s)) + (e); \
(c) = ROL((c), 10); \
}
#define II(a, b, c, d, e, x, s) { \
(a) += I((b), (c), (d)) + (x) + 0x8f1bbcdcU; \
(a) = ROL((a), (s)) + (e); \
(c) = ROL((c), 10); \
}
#define JJ(a, b, c, d, e, x, s) { \
(a) += J((b), (c), (d)) + (x) + 0xa953fd4eU; \
(a) = ROL((a), (s)) + (e); \
(c) = ROL((c), 10); \
}
#define FFF(a, b, c, d, e, x, s) { \
(a) += F((b), (c), (d)) + (x); \
(a) = ROL((a), (s)) + (e); \
(c) = ROL((c), 10); \
}
#define GGG(a, b, c, d, e, x, s) { \
(a) += G((b), (c), (d)) + (x) + 0x7a6d76e9U; \
(a) = ROL((a), (s)) + (e); \
(c) = ROL((c), 10); \
}
#define HHH(a, b, c, d, e, x, s) { \
(a) += H((b), (c), (d)) + (x) + 0x6d703ef3U; \
(a) = ROL((a), (s)) + (e); \
(c) = ROL((c), 10); \
}
#define III(a, b, c, d, e, x, s) { \
(a) += I((b), (c), (d)) + (x) + 0x5c4dd124U; \
(a) = ROL((a), (s)) + (e); \
(c) = ROL((c), 10); \
}
#define JJJ(a, b, c, d, e, x, s) { \
(a) += J((b), (c), (d)) + (x) + 0x50a28be6U; \
(a) = ROL((a), (s)) + (e); \
(c) = ROL((c), 10); \
}
/********************************************************************/
void RMD160Init(context)
RMD160_CTX *context;
{
/* ripemd-160 initialization constants */
context->state[0] = 0x67452301U;
context->state[1] = 0xefcdab89U;
context->state[2] = 0x98badcfeU;
context->state[3] = 0x10325476U;
context->state[4] = 0xc3d2e1f0U;
context->length[0] = context->length[1] = 0;
context->buflen = 0;
}
/********************************************************************/
void RMD160Transform(state, block)
u_int32_t state[5];
const u_int32_t block[16];
{
u_int32_t aa = state[0], bb = state[1], cc = state[2],
dd = state[3], ee = state[4];
u_int32_t aaa = state[0], bbb = state[1], ccc = state[2],
ddd = state[3], eee = state[4];
/* round 1 */
FF(aa, bb, cc, dd, ee, block[ 0], 11);
FF(ee, aa, bb, cc, dd, block[ 1], 14);
FF(dd, ee, aa, bb, cc, block[ 2], 15);
FF(cc, dd, ee, aa, bb, block[ 3], 12);
FF(bb, cc, dd, ee, aa, block[ 4], 5);
FF(aa, bb, cc, dd, ee, block[ 5], 8);
FF(ee, aa, bb, cc, dd, block[ 6], 7);
FF(dd, ee, aa, bb, cc, block[ 7], 9);
FF(cc, dd, ee, aa, bb, block[ 8], 11);
FF(bb, cc, dd, ee, aa, block[ 9], 13);
FF(aa, bb, cc, dd, ee, block[10], 14);
FF(ee, aa, bb, cc, dd, block[11], 15);
FF(dd, ee, aa, bb, cc, block[12], 6);
FF(cc, dd, ee, aa, bb, block[13], 7);
FF(bb, cc, dd, ee, aa, block[14], 9);
FF(aa, bb, cc, dd, ee, block[15], 8);
/* round 2 */
GG(ee, aa, bb, cc, dd, block[ 7], 7);
GG(dd, ee, aa, bb, cc, block[ 4], 6);
GG(cc, dd, ee, aa, bb, block[13], 8);
GG(bb, cc, dd, ee, aa, block[ 1], 13);
GG(aa, bb, cc, dd, ee, block[10], 11);
GG(ee, aa, bb, cc, dd, block[ 6], 9);
GG(dd, ee, aa, bb, cc, block[15], 7);
GG(cc, dd, ee, aa, bb, block[ 3], 15);
GG(bb, cc, dd, ee, aa, block[12], 7);
GG(aa, bb, cc, dd, ee, block[ 0], 12);
GG(ee, aa, bb, cc, dd, block[ 9], 15);
GG(dd, ee, aa, bb, cc, block[ 5], 9);
GG(cc, dd, ee, aa, bb, block[ 2], 11);
GG(bb, cc, dd, ee, aa, block[14], 7);
GG(aa, bb, cc, dd, ee, block[11], 13);
GG(ee, aa, bb, cc, dd, block[ 8], 12);
/* round 3 */
HH(dd, ee, aa, bb, cc, block[ 3], 11);
HH(cc, dd, ee, aa, bb, block[10], 13);
HH(bb, cc, dd, ee, aa, block[14], 6);
HH(aa, bb, cc, dd, ee, block[ 4], 7);
HH(ee, aa, bb, cc, dd, block[ 9], 14);
HH(dd, ee, aa, bb, cc, block[15], 9);
HH(cc, dd, ee, aa, bb, block[ 8], 13);
HH(bb, cc, dd, ee, aa, block[ 1], 15);
HH(aa, bb, cc, dd, ee, block[ 2], 14);
HH(ee, aa, bb, cc, dd, block[ 7], 8);
HH(dd, ee, aa, bb, cc, block[ 0], 13);
HH(cc, dd, ee, aa, bb, block[ 6], 6);
HH(bb, cc, dd, ee, aa, block[13], 5);
HH(aa, bb, cc, dd, ee, block[11], 12);
HH(ee, aa, bb, cc, dd, block[ 5], 7);
HH(dd, ee, aa, bb, cc, block[12], 5);
/* round 4 */
II(cc, dd, ee, aa, bb, block[ 1], 11);
II(bb, cc, dd, ee, aa, block[ 9], 12);
II(aa, bb, cc, dd, ee, block[11], 14);
II(ee, aa, bb, cc, dd, block[10], 15);
II(dd, ee, aa, bb, cc, block[ 0], 14);
II(cc, dd, ee, aa, bb, block[ 8], 15);
II(bb, cc, dd, ee, aa, block[12], 9);
II(aa, bb, cc, dd, ee, block[ 4], 8);
II(ee, aa, bb, cc, dd, block[13], 9);
II(dd, ee, aa, bb, cc, block[ 3], 14);
II(cc, dd, ee, aa, bb, block[ 7], 5);
II(bb, cc, dd, ee, aa, block[15], 6);
II(aa, bb, cc, dd, ee, block[14], 8);
II(ee, aa, bb, cc, dd, block[ 5], 6);
II(dd, ee, aa, bb, cc, block[ 6], 5);
II(cc, dd, ee, aa, bb, block[ 2], 12);
/* round 5 */
JJ(bb, cc, dd, ee, aa, block[ 4], 9);
JJ(aa, bb, cc, dd, ee, block[ 0], 15);
JJ(ee, aa, bb, cc, dd, block[ 5], 5);
JJ(dd, ee, aa, bb, cc, block[ 9], 11);
JJ(cc, dd, ee, aa, bb, block[ 7], 6);
JJ(bb, cc, dd, ee, aa, block[12], 8);
JJ(aa, bb, cc, dd, ee, block[ 2], 13);
JJ(ee, aa, bb, cc, dd, block[10], 12);
JJ(dd, ee, aa, bb, cc, block[14], 5);
JJ(cc, dd, ee, aa, bb, block[ 1], 12);
JJ(bb, cc, dd, ee, aa, block[ 3], 13);
JJ(aa, bb, cc, dd, ee, block[ 8], 14);
JJ(ee, aa, bb, cc, dd, block[11], 11);
JJ(dd, ee, aa, bb, cc, block[ 6], 8);
JJ(cc, dd, ee, aa, bb, block[15], 5);
JJ(bb, cc, dd, ee, aa, block[13], 6);
/* parallel round 1 */
JJJ(aaa, bbb, ccc, ddd, eee, block[ 5], 8);
JJJ(eee, aaa, bbb, ccc, ddd, block[14], 9);
JJJ(ddd, eee, aaa, bbb, ccc, block[ 7], 9);
JJJ(ccc, ddd, eee, aaa, bbb, block[ 0], 11);
JJJ(bbb, ccc, ddd, eee, aaa, block[ 9], 13);
JJJ(aaa, bbb, ccc, ddd, eee, block[ 2], 15);
JJJ(eee, aaa, bbb, ccc, ddd, block[11], 15);
JJJ(ddd, eee, aaa, bbb, ccc, block[ 4], 5);
JJJ(ccc, ddd, eee, aaa, bbb, block[13], 7);
JJJ(bbb, ccc, ddd, eee, aaa, block[ 6], 7);
JJJ(aaa, bbb, ccc, ddd, eee, block[15], 8);
JJJ(eee, aaa, bbb, ccc, ddd, block[ 8], 11);
JJJ(ddd, eee, aaa, bbb, ccc, block[ 1], 14);
JJJ(ccc, ddd, eee, aaa, bbb, block[10], 14);
JJJ(bbb, ccc, ddd, eee, aaa, block[ 3], 12);
JJJ(aaa, bbb, ccc, ddd, eee, block[12], 6);
/* parallel round 2 */
III(eee, aaa, bbb, ccc, ddd, block[ 6], 9);
III(ddd, eee, aaa, bbb, ccc, block[11], 13);
III(ccc, ddd, eee, aaa, bbb, block[ 3], 15);
III(bbb, ccc, ddd, eee, aaa, block[ 7], 7);
III(aaa, bbb, ccc, ddd, eee, block[ 0], 12);
III(eee, aaa, bbb, ccc, ddd, block[13], 8);
III(ddd, eee, aaa, bbb, ccc, block[ 5], 9);
III(ccc, ddd, eee, aaa, bbb, block[10], 11);
III(bbb, ccc, ddd, eee, aaa, block[14], 7);
III(aaa, bbb, ccc, ddd, eee, block[15], 7);
III(eee, aaa, bbb, ccc, ddd, block[ 8], 12);
III(ddd, eee, aaa, bbb, ccc, block[12], 7);
III(ccc, ddd, eee, aaa, bbb, block[ 4], 6);
III(bbb, ccc, ddd, eee, aaa, block[ 9], 15);
III(aaa, bbb, ccc, ddd, eee, block[ 1], 13);
III(eee, aaa, bbb, ccc, ddd, block[ 2], 11);
/* parallel round 3 */
HHH(ddd, eee, aaa, bbb, ccc, block[15], 9);
HHH(ccc, ddd, eee, aaa, bbb, block[ 5], 7);
HHH(bbb, ccc, ddd, eee, aaa, block[ 1], 15);
HHH(aaa, bbb, ccc, ddd, eee, block[ 3], 11);
HHH(eee, aaa, bbb, ccc, ddd, block[ 7], 8);
HHH(ddd, eee, aaa, bbb, ccc, block[14], 6);
HHH(ccc, ddd, eee, aaa, bbb, block[ 6], 6);
HHH(bbb, ccc, ddd, eee, aaa, block[ 9], 14);
HHH(aaa, bbb, ccc, ddd, eee, block[11], 12);
HHH(eee, aaa, bbb, ccc, ddd, block[ 8], 13);
HHH(ddd, eee, aaa, bbb, ccc, block[12], 5);
HHH(ccc, ddd, eee, aaa, bbb, block[ 2], 14);
HHH(bbb, ccc, ddd, eee, aaa, block[10], 13);
HHH(aaa, bbb, ccc, ddd, eee, block[ 0], 13);
HHH(eee, aaa, bbb, ccc, ddd, block[ 4], 7);
HHH(ddd, eee, aaa, bbb, ccc, block[13], 5);
/* parallel round 4 */
GGG(ccc, ddd, eee, aaa, bbb, block[ 8], 15);
GGG(bbb, ccc, ddd, eee, aaa, block[ 6], 5);
GGG(aaa, bbb, ccc, ddd, eee, block[ 4], 8);
GGG(eee, aaa, bbb, ccc, ddd, block[ 1], 11);
GGG(ddd, eee, aaa, bbb, ccc, block[ 3], 14);
GGG(ccc, ddd, eee, aaa, bbb, block[11], 14);
GGG(bbb, ccc, ddd, eee, aaa, block[15], 6);
GGG(aaa, bbb, ccc, ddd, eee, block[ 0], 14);
GGG(eee, aaa, bbb, ccc, ddd, block[ 5], 6);
GGG(ddd, eee, aaa, bbb, ccc, block[12], 9);
GGG(ccc, ddd, eee, aaa, bbb, block[ 2], 12);
GGG(bbb, ccc, ddd, eee, aaa, block[13], 9);
GGG(aaa, bbb, ccc, ddd, eee, block[ 9], 12);
GGG(eee, aaa, bbb, ccc, ddd, block[ 7], 5);
GGG(ddd, eee, aaa, bbb, ccc, block[10], 15);
GGG(ccc, ddd, eee, aaa, bbb, block[14], 8);
/* parallel round 5 */
FFF(bbb, ccc, ddd, eee, aaa, block[12] , 8);
FFF(aaa, bbb, ccc, ddd, eee, block[15] , 5);
FFF(eee, aaa, bbb, ccc, ddd, block[10] , 12);
FFF(ddd, eee, aaa, bbb, ccc, block[ 4] , 9);
FFF(ccc, ddd, eee, aaa, bbb, block[ 1] , 12);
FFF(bbb, ccc, ddd, eee, aaa, block[ 5] , 5);
FFF(aaa, bbb, ccc, ddd, eee, block[ 8] , 14);
FFF(eee, aaa, bbb, ccc, ddd, block[ 7] , 6);
FFF(ddd, eee, aaa, bbb, ccc, block[ 6] , 8);
FFF(ccc, ddd, eee, aaa, bbb, block[ 2] , 13);
FFF(bbb, ccc, ddd, eee, aaa, block[13] , 6);
FFF(aaa, bbb, ccc, ddd, eee, block[14] , 5);
FFF(eee, aaa, bbb, ccc, ddd, block[ 0] , 15);
FFF(ddd, eee, aaa, bbb, ccc, block[ 3] , 13);
FFF(ccc, ddd, eee, aaa, bbb, block[ 9] , 11);
FFF(bbb, ccc, ddd, eee, aaa, block[11] , 11);
/* combine results */
ddd += cc + state[1]; /* final result for state[0] */
state[1] = state[2] + dd + eee;
state[2] = state[3] + ee + aaa;
state[3] = state[4] + aa + bbb;
state[4] = state[0] + bb + ccc;
state[0] = ddd;
}
/********************************************************************/
void RMD160Update(context, data, nbytes)
RMD160_CTX *context;
const u_char *data;
u_int32_t nbytes;
{
u_int32_t X[16];
u_int32_t ofs = 0;
u_int32_t i;
#if BYTE_ORDER != LITTLE_ENDIAN
u_int32_t j;
#endif
/* update length[] */
if (context->length[0] + nbytes < context->length[0])
context->length[1]++; /* overflow to msb of length */
context->length[0] += nbytes;
bzero(X, sizeof(X));
if ( context->buflen + nbytes < 64 )
{
bcopy(data, context->bbuffer + context->buflen, nbytes);
context->buflen += nbytes;
}
else
{
/* process first block */
ofs = 64 - context->buflen;
bcopy(data, context->bbuffer + context->buflen, ofs);
#if BYTE_ORDER == LITTLE_ENDIAN
bcopy(context->bbuffer, X, sizeof(X));
#else
for (j=0; j < 16; j++)
X[j] = BYTES_TO_DWORD(context->bbuffer + (4 * j));
#endif
RMD160Transform(context->state, X);
nbytes -= ofs;
/* process remaining complete blocks */
for (i = 0; i < (nbytes >> 6); i++) {
#if BYTE_ORDER == LITTLE_ENDIAN
bcopy(data + (64 * i) + ofs, X, sizeof(X));
#else
for (j=0; j < 16; j++)
X[j] = BYTES_TO_DWORD(data + (64 * i) + (4 * j) + ofs);
#endif
RMD160Transform(context->state, X);
}
/*
* Put last bytes from data into context's buffer
*/
context->buflen = nbytes & 63;
bcopy(data + (64 * i) + ofs, context->bbuffer, context->buflen);
}
}
/********************************************************************/
void RMD160Final(digest, context)
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
/* append the bit m_n == 1 */
context->bbuffer[context->buflen] = '\200';
bzero(context->bbuffer + context->buflen + 1, 63 - context->buflen);
#if BYTE_ORDER == LITTLE_ENDIAN
bcopy(context->bbuffer, X, sizeof(X));
#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);
bzero(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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