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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)

static char sccsid[] = "@(#)publickey.c 1.10 91/03/11 Copyr 1986 Sun Micro";

#endif

/*

 * publickey.c

 * Copyright (C) 1986, Sun Microsystems, Inc.

 */

/*

 * Public 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>

#include <stdlib.h>

#define PKFILE "/etc/publickey"

/*

 * Hack to let ypserv/rpc.nisd use AUTH_DES.

 */

int (*__getpublickey_LOCAL)() = 0;

/*

 * Get somebody's public key

 */

int

__getpublickey_real(netname, publickey)

        char *netname;

        char *publickey;

{

        char lookup[3 * HEXKEYBYTES];

        char *p;

        if (publickey == NULL)

                return (0);

        if (!getpublicandprivatekey(netname, lookup))

                return (0);

        p = strchr(lookup, ':');

        if (p == NULL) {

                return (0);

        }

        *p = '\0';

        (void) strncpy(publickey, lookup, HEXKEYBYTES);

        publickey[HEXKEYBYTES] = '\0';

        return (1);

}

/*

 * reads the file /etc/publickey looking for a + to optionally go to the

 * yellow pages

 */

int

getpublicandprivatekey(key, ret)

        char *key;

        char *ret;

{

        char buf[1024]; /* big enough */

        char *res;

        FILE *fd;

        char *mkey;

        char *mval;

        fd = fopen(PKFILE, "r");

        if (fd == (FILE *) 0)

                return (0);

        for (;;) {

                res = fgets(buf, 1024, fd);

                if (res == 0) {

                        fclose(fd);

                        return (0);

                }

                if (res[0] == '#')

                        continue;

                else if (res[0] == '+') {

#ifdef YP

                        char *PKMAP = "publickey.byname";

                        char *lookup;

                        char *domain;

                        int err;

                        int len;

                        err = yp_get_default_domain(&domain);

                        if (err) {

                                continue;

                        }

                        lookup = NULL;

                        err = yp_match(domain, PKMAP, key, strlen(key), &lookup, &len);

                        if (err) {

#ifdef DEBUG

                                fprintf(stderr, "match failed error %d\n", err);

#endif

                                continue;

                        }

                        lookup[len] = 0;

                        strcpy(ret, lookup);

                        fclose(fd);

                        free(lookup);

                        return (2);

#else /* YP */

#ifdef DEBUG

                        fprintf(stderr,

"Bad record in %s '+' -- NIS not supported in this library copy\n", PKFILE);

#endif /* DEBUG */

                        continue;

#endif /* YP */

                } else {

                        mkey = strtok(buf, "\t ");

                        if (mkey == NULL) {

                                fprintf(stderr,

                                "Bad record in %s -- %s", PKFILE, buf);

                                continue;

                        }

                        mval = strtok((char *)NULL, " \t#\n");

                        if (mval == NULL) {

                                fprintf(stderr,

                        "Bad record in %s val problem - %s", PKFILE, buf);

                                continue;

                        }

                        if (strcmp(mkey, key) == 0) {

                                strcpy(ret, mval);

                                fclose(fd);

                                return (1);

                        }

                }

        }

}

int getpublickey(netname, publickey)

        char *netname;

        char *publickey;

{

        if (__getpublickey_LOCAL != NULL)

                return(__getpublickey_LOCAL(netname, publickey));

        else

                return(__getpublickey_real(netname, publickey));

}