133 lines
2.8 KiB
C
133 lines
2.8 KiB
C
/* Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */
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/* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */
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/* All Rights Reserved */
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/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF */
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/* UNIX System Laboratories, Inc. */
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/* The copyright notice above does not evidence any */
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/* actual or intended publication of such source code. */
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#ident "@(#)keyserv:generic.c 1.1.3.2"
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/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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* PROPRIETARY NOTICE (Combined)
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*
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* This source code is unpublished proprietary information
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* constituting, or derived under license from AT&T's UNIX(r) System V.
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* In addition, portions of such source code were derived from Berkeley
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* 4.3 BSD under license from the Regents of the University of
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* California.
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*
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*
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*
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* Copyright Notice
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*
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* Notice of copyright on this source code product does not indicate
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* publication.
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*
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* (c) 1986,1987,1988,1989,1990 Sun Microsystems, Inc
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* (c) 1983,1984,1985,1986,1987,1988,1989,1990 AT&T.
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* (c) 1990,1991 UNIX System Laboratories, Inc.
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* All rights reserved.
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*/
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#include <stdio.h>
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#include <rpc/rpc.h>
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#include <sys/file.h>
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#include "mp.h"
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#include <rpc/key_prot.h>
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static void adjust( char *, char *);
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/*
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* Generate a seed
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*/
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static
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getseed(seed, seedsize, pass)
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char *seed;
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int seedsize;
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unsigned char *pass;
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{
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int i;
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int rseed;
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struct timeval tv;
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(void)gettimeofday(&tv, (struct timezone *)NULL);
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rseed = tv.tv_sec + tv.tv_usec;
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for (i = 0; i < 8; i++) {
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rseed ^= (rseed << 8) | pass[i];
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}
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srand(rseed);
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for (i = 0; i < seedsize; i++) {
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seed[i] = (rand() & 0xff) ^ pass[i % 8];
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}
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}
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/*
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* Generate a random public/secret key pair
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*/
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genkeys(public, secret, pass)
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char *public;
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char *secret;
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char *pass;
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{
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int i;
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# define BASEBITS (8*sizeof (short) - 1)
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# define BASE (1 << BASEBITS)
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MINT *pk = itom(0);
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MINT *sk = itom(0);
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MINT *tmp;
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MINT *base = itom(BASE);
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MINT *root = itom(PROOT);
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MINT *modulus = xtom(HEXMODULUS);
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short r;
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unsigned short seed[KEYSIZE/BASEBITS + 1];
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char *xkey;
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getseed((char *)seed, sizeof (seed), (u_char *)pass);
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for (i = 0; i < KEYSIZE/BASEBITS + 1; i++) {
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r = seed[i] % BASE;
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tmp = itom(r);
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mult(sk, base, sk);
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madd(sk, tmp, sk);
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mfree(tmp);
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}
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tmp = itom(0);
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mdiv(sk, modulus, tmp, sk);
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mfree(tmp);
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pow(root, sk, modulus, pk);
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xkey = mtox(sk);
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adjust(secret, xkey);
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xkey = mtox(pk);
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adjust(public, xkey);
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mfree(sk);
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mfree(base);
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mfree(pk);
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mfree(root);
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mfree(modulus);
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}
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/*
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* Adjust the input key so that it is 0-filled on the left
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*/
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static void
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adjust(keyout, keyin)
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char keyout[HEXKEYBYTES+1];
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char *keyin;
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{
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char *p;
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char *s;
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for (p = keyin; *p; p++)
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;
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for (s = keyout + HEXKEYBYTES; p >= keyin; p--, s--) {
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*s = *p;
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}
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while (s >= keyout) {
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*s-- = '0';
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}
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}
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