1 /*-
2 * Copyright (c) 2009, Sun Microsystems, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * - Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 * - Redistributions in binary form must reproduce the above copyright notice,
10 * this list of conditions and the following disclaimer in the documentation
11 * and/or other materials provided with the distribution.
12 * - Neither the name of Sun Microsystems, Inc. nor the names of its
13 * contributors may be used to endorse or promote products derived
14 * from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $FreeBSD: src/lib/libc/rpc/getpublickey.c,v 1.9 2006/02/28 16:02:26 deischen Exp $
29 *
30 * @(#)publickey.c 1.10 91/03/11 Copyr 1986 Sun Micro
31 */
32
33 /*
34 * publickey.c
35 * Copyright (C) 1986, Sun Microsystems, Inc.
36 */
37
38 /*
39 * Public key lookup routines
40 */
41 #include "namespace.h"
42 #include <stdio.h>
43 #include <pwd.h>
44 #include <rpc/rpc.h>
45 #include <rpc/key_prot.h>
46 #include <rpcsvc/yp_prot.h>
47 #include <rpcsvc/ypclnt.h>
48 #include <string.h>
49 #include <stdlib.h>
50 #include "un-namespace.h"
51
52 #define PKFILE "/etc/publickey"
53
54 /*
55 * Hack to let ypserv/rpc.nisd use AUTH_DES.
56 */
57 int (*__getpublickey_LOCAL)(const char *, char *) = NULL;
58
59 /*
60 * Get somebody's public key
61 */
62 static int
__getpublickey_real(const char * netname,char * publickey)63 __getpublickey_real(const char *netname, char *publickey)
64 {
65 char lookup[3 * HEXKEYBYTES];
66 char *p;
67
68 if (publickey == NULL)
69 return (0);
70 if (!getpublicandprivatekey(netname, lookup))
71 return (0);
72 p = strchr(lookup, ':');
73 if (p == NULL) {
74 return (0);
75 }
76 *p = '\0';
77 strncpy(publickey, lookup, HEXKEYBYTES);
78 publickey[HEXKEYBYTES] = '\0';
79 return (1);
80 }
81
82 /*
83 * reads the file /etc/publickey looking for a + to optionally go to the
84 * yellow pages
85 */
86
87 int
getpublicandprivatekey(const char * key,char * ret)88 getpublicandprivatekey(const char *key, char *ret)
89 {
90 char buf[1024]; /* big enough */
91 char *res;
92 FILE *fd;
93 char *mkey;
94 char *mval;
95
96 fd = fopen(PKFILE, "r");
97 if (fd == NULL)
98 return (0);
99 for (;;) {
100 res = fgets(buf, sizeof(buf), fd);
101 if (res == NULL) {
102 fclose(fd);
103 return (0);
104 }
105 if (res[0] == '#')
106 continue;
107 else if (res[0] == '+') {
108 #ifdef YP
109 char *PKMAP = "publickey.byname";
110 char *lookup;
111 char *domain;
112 int err;
113 int len;
114
115 err = yp_get_default_domain(&domain);
116 if (err) {
117 continue;
118 }
119 lookup = NULL;
120 err = yp_match(domain, PKMAP, key, strlen(key), &lookup, &len);
121 if (err) {
122 #ifdef DEBUG
123 fprintf(stderr, "match failed error %d\n", err);
124 #endif
125 continue;
126 }
127 lookup[len] = 0;
128 strcpy(ret, lookup);
129 fclose(fd);
130 free(lookup);
131 return (2);
132 #else /* YP */
133 #ifdef DEBUG
134 fprintf(stderr,
135 "Bad record in %s '+' -- NIS not supported in this library copy\n", PKFILE);
136 #endif /* DEBUG */
137 continue;
138 #endif /* YP */
139 } else {
140 mkey = strsep(&res, "\t ");
141 if (mkey == NULL) {
142 fprintf(stderr,
143 "Bad record in %s -- %s", PKFILE, buf);
144 continue;
145 }
146 do {
147 mval = strsep(&res, " \t#\n");
148 } while (mval != NULL && !*mval);
149 if (mval == NULL) {
150 fprintf(stderr,
151 "Bad record in %s val problem - %s", PKFILE, buf);
152 continue;
153 }
154 if (strcmp(mkey, key) == 0) {
155 strcpy(ret, mval);
156 fclose(fd);
157 return (1);
158 }
159 }
160 }
161 }
162
163 int
getpublickey(const char * netname,char * publickey)164 getpublickey(const char *netname, char *publickey)
165 {
166 if (__getpublickey_LOCAL != NULL)
167 return(__getpublickey_LOCAL(netname, publickey));
168 else
169 return(__getpublickey_real(netname, publickey));
170 }
171