freebsd-dev/lib/librpcsvc/secretkey.c

/*
 * 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
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)secretkey.c 1.8 91/03/11 Copyr 1986 Sun Micro";
#endif

/*
 * secretkey.c
 * Copyright (C) 1986, Sun Microsystems, Inc.
 */

/*
 * Secret key lookup routines
 */
#include <stdio.h>
#include <pwd.h>
#include <rpc/rpc.h>
#include <rpc/key_prot.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#include <string.h>

extern int xdecrypt( char *, char * );

/*
 * Get somebody's encrypted secret key from the database, using the given
 * passwd to decrypt it.
 */
int
getsecretkey(char *netname, char *secretkey, char *passwd)
{
	char lookup[3 * HEXKEYBYTES];
	char *p;

	if (secretkey == NULL)
		return (0);
	if (!getpublicandprivatekey(netname, lookup))
		return (0);
	p = strchr(lookup, ':');
	if (p == NULL) {
		return (0);
	}
	p++;
	if (!xdecrypt(p, passwd)) {
		return (0);
	}
	if (memcmp(p, p + HEXKEYBYTES, KEYCHECKSUMSIZE) != 0) {
		secretkey[0] = '\0';
		return (1);
	}
	p[HEXKEYBYTES] = '\0';
	(void) strncpy(secretkey, p, HEXKEYBYTES);
	secretkey[HEXKEYBYTES] = '\0';
	return (1);
}