1/*
2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part.  Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user or with the express written consent of
8 * Sun Microsystems, Inc.
9 *
10 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
11 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
12 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
13 *
14 * Sun RPC is provided with no support and without any obligation on the
15 * part of Sun Microsystems, Inc. to assist in its use, correction,
16 * modification or enhancement.
17 *
18 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
19 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
20 * OR ANY PART THEREOF.
21 *
22 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
23 * or profits or other special, indirect and consequential damages, even if
24 * Sun has been advised of the possibility of such damages.
25 *
26 * Sun Microsystems, Inc.
27 * 2550 Garcia Avenue
28 * Mountain View, California  94043
29 */
30
31#if defined(LIBC_SCCS) && !defined(lint)
32static char sccsid[] = "@(#)publickey.c 1.10 91/03/11 Copyr 1986 Sun Micro";
33#endif
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD$");
36
37/*
38 * publickey.c
39 * Copyright (C) 1986, Sun Microsystems, Inc.
40 */
41
42/*
43 * Public key lookup routines
44 */
45#include "namespace.h"
46#include <stdio.h>
47#include <pwd.h>
48#include <rpc/rpc.h>
49#include <rpc/key_prot.h>
50#include <rpcsvc/yp_prot.h>
51#include <rpcsvc/ypclnt.h>
52#include <string.h>
53#include <stdlib.h>
54#include "un-namespace.h"
55
56#define PKFILE "/etc/publickey"
57
58/*
59 * Hack to let ypserv/rpc.nisd use AUTH_DES.
60 */
61int (*__getpublickey_LOCAL)() = 0;
62
63/*
64 * Get somebody's public key
65 */
66static int
67__getpublickey_real(netname, publickey)
68	const char *netname;
69	char *publickey;
70{
71	char lookup[3 * HEXKEYBYTES];
72	char *p;
73
74	if (publickey == NULL)
75		return (0);
76	if (!getpublicandprivatekey(netname, lookup))
77		return (0);
78	p = strchr(lookup, ':');
79	if (p == NULL) {
80		return (0);
81	}
82	*p = '\0';
83	(void) strncpy(publickey, lookup, HEXKEYBYTES);
84	publickey[HEXKEYBYTES] = '\0';
85	return (1);
86}
87
88/*
89 * reads the file /etc/publickey looking for a + to optionally go to the
90 * yellow pages
91 */
92
93int
94getpublicandprivatekey(key, ret)
95	const char *key;
96	char *ret;
97{
98	char buf[1024];	/* big enough */
99	char *res;
100	FILE *fd;
101	char *mkey;
102	char *mval;
103
104	fd = fopen(PKFILE, "r");
105	if (fd == NULL)
106		return (0);
107	for (;;) {
108		res = fgets(buf, sizeof(buf), fd);
109		if (res == NULL) {
110			fclose(fd);
111			return (0);
112		}
113		if (res[0] == '#')
114			continue;
115		else if (res[0] == '+') {
116#ifdef YP
117			char *PKMAP = "publickey.byname";
118			char *lookup;
119			char *domain;
120			int err;
121			int len;
122
123			err = yp_get_default_domain(&domain);
124			if (err) {
125				continue;
126			}
127			lookup = NULL;
128			err = yp_match(domain, PKMAP, key, strlen(key), &lookup, &len);
129			if (err) {
130#ifdef DEBUG
131				fprintf(stderr, "match failed error %d\n", err);
132#endif
133				continue;
134			}
135			lookup[len] = 0;
136			strcpy(ret, lookup);
137			fclose(fd);
138			free(lookup);
139			return (2);
140#else /* YP */
141#ifdef DEBUG
142			fprintf(stderr,
143"Bad record in %s '+' -- NIS not supported in this library copy\n", PKFILE);
144#endif /* DEBUG */
145			continue;
146#endif /* YP */
147		} else {
148			mkey = strsep(&res, "\t ");
149			if (mkey == NULL) {
150				fprintf(stderr,
151				"Bad record in %s -- %s", PKFILE, buf);
152				continue;
153			}
154			do {
155				mval = strsep(&res, " \t#\n");
156			} while (mval != NULL && !*mval);
157			if (mval == NULL) {
158				fprintf(stderr,
159			"Bad record in %s val problem - %s", PKFILE, buf);
160				continue;
161			}
162			if (strcmp(mkey, key) == 0) {
163				strcpy(ret, mval);
164				fclose(fd);
165				return (1);
166			}
167		}
168	}
169}
170
171int getpublickey(netname, publickey)
172	const char *netname;
173	char *publickey;
174{
175	if (__getpublickey_LOCAL != NULL)
176		return(__getpublickey_LOCAL(netname, publickey));
177	else
178		return(__getpublickey_real(netname, publickey));
179}
180