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/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user or with the express written consent of
* Sun Microsystems, Inc.
*
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
*
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
#if !defined(lint) && defined(SCCSIDS)
#if 0
static char sccsid[] = "@(#)generic.c 1.2 91/03/11 Copyr 1986 Sun Micro";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif
/*
* Copyright (C) 1986, Sun Microsystems, Inc.
*/
#include <stdio.h>
#include <stdlib.h>
#include <rpc/rpc.h>
#include <sys/file.h>
#include <mp.h>
#include <rpc/key_prot.h>
static int adjust __P(( char[], char * ));
/*
* Generate a seed
*/
static
getseed(seed, seedsize, pass)
char *seed;
int seedsize;
unsigned char *pass;
{
int i;
for (i = 0; i < seedsize; i++) {
seed[i] = (arc4random() & 0xff) ^ pass[i % 8];
}
}
/*
* Generate a random public/secret key pair
*/
genkeys(public, secret, pass)
char *public;
char *secret;
char *pass;
{
int i;
# define BASEBITS (8*sizeof (short) - 1)
# define BASE (1 << BASEBITS)
MINT *pk = itom(0);
MINT *sk = itom(0);
MINT *tmp;
MINT *base = itom(BASE);
MINT *root = itom(PROOT);
MINT *modulus = xtom(HEXMODULUS);
short r;
unsigned short seed[KEYSIZE/BASEBITS + 1];
char *xkey;
getseed((char *)seed, sizeof (seed), (u_char *)pass);
for (i = 0; i < KEYSIZE/BASEBITS + 1; i++) {
r = seed[i] % BASE;
tmp = itom(r);
mult(sk, base, sk);
madd(sk, tmp, sk);
mfree(tmp);
}
tmp = itom(0);
mdiv(sk, modulus, tmp, sk);
mfree(tmp);
pow(root, sk, modulus, pk);
xkey = mtox(sk);
adjust(secret, xkey);
xkey = mtox(pk);
adjust(public, xkey);
mfree(sk);
mfree(base);
mfree(pk);
mfree(root);
mfree(modulus);
}
/*
* Adjust the input key so that it is 0-filled on the left
*/
static
adjust(keyout, keyin)
char keyout[HEXKEYBYTES+1];
char *keyin;
{
char *p;
char *s;
for (p = keyin; *p; p++)
;
for (s = keyout + HEXKEYBYTES; p >= keyin; p--, s--) {
*s = *p;
}
while (s >= keyout) {
*s-- = '0';
}
}
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