1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 1995, 1996
5 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Bill Paul.
18 * 4. Neither the name of the author nor the names of any co-contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * ypupdate client-side library function.
35 *
36 * Written by Bill Paul <wpaul@ctr.columbia.edu>
37 * Center for Telecommunications Research
38 * Columbia University, New York City
39 */
40
41 #include <sys/cdefs.h>
42 #include <stdlib.h>
43 #include <rpc/rpc.h>
44 #include <rpcsvc/yp_prot.h>
45 #include <rpcsvc/ypclnt.h>
46 #include <rpcsvc/ypupdate_prot.h>
47 #include <rpc/key_prot.h>
48
49 #ifndef WINDOW
50 #define WINDOW (60*60)
51 #endif
52
53 #ifndef TIMEOUT
54 #define TIMEOUT 300
55 #endif
56
57 int
yp_update(char * domain,char * map,unsigned int ypop,char * key,int keylen,char * data,int datalen)58 yp_update(char *domain, char *map, unsigned int ypop, char *key, int keylen,
59 char *data, int datalen)
60 {
61 char *master;
62 int rval;
63 unsigned int res;
64 struct ypupdate_args upargs;
65 struct ypdelete_args delargs;
66 CLIENT *clnt;
67 char netname[MAXNETNAMELEN+1];
68 des_block des_key;
69 struct timeval timeout;
70
71 /* Get the master server name for 'domain.' */
72 if ((rval = yp_master(domain, map, &master)))
73 return(rval);
74
75 /* Check that ypupdated is running there. */
76 if (getrpcport(master, YPU_PROG, YPU_VERS, ypop))
77 return(YPERR_DOMAIN);
78
79 /* Get a handle. */
80 if ((clnt = clnt_create(master, YPU_PROG, YPU_VERS, "tcp")) == NULL)
81 return(YPERR_RPC);
82
83 /*
84 * Assemble netname of server.
85 * NOTE: It's difficult to discern from the documentation, but
86 * when you make a Secure RPC call, the netname you pass should
87 * be the netname of the guy on the other side, not your own
88 * netname. This is how the client side knows what public key
89 * to use for the initial exchange. Passing your own netname
90 * only works if the server on the other side is running under
91 * your UID.
92 */
93 if (!host2netname(netname, master, domain)) {
94 clnt_destroy(clnt);
95 return(YPERR_BADARGS);
96 }
97
98 /* Make up a DES session key. */
99 key_gendes(&des_key);
100
101 /* Set up DES authentication. */
102 if ((clnt->cl_auth = (AUTH *)authdes_create(netname, WINDOW, NULL,
103 &des_key)) == NULL) {
104 clnt_destroy(clnt);
105 return(YPERR_RESRC);
106 }
107
108 /* Set a timeout for clnt_call(). */
109 timeout.tv_usec = 0;
110 timeout.tv_sec = TIMEOUT;
111
112 /*
113 * Make the call. Note that we use clnt_call() here rather than
114 * the rpcgen-erated client stubs. We could use those stubs, but
115 * then we'd have to do some gymnastics to get at the error
116 * information to figure out what error code to send back to the
117 * caller. With clnt_call(), we get the error status returned to
118 * us right away, and we only have to exert a small amount of
119 * extra effort.
120 */
121 switch (ypop) {
122 case YPOP_CHANGE:
123 upargs.mapname = map;
124 upargs.key.yp_buf_len = keylen;
125 upargs.key.yp_buf_val = key;
126 upargs.datum.yp_buf_len = datalen;
127 upargs.datum.yp_buf_val = data;
128
129 if ((rval = clnt_call(clnt, YPU_CHANGE,
130 (xdrproc_t)xdr_ypupdate_args, &upargs,
131 (xdrproc_t)xdr_u_int, &res, timeout)) != RPC_SUCCESS) {
132 if (rval == RPC_AUTHERROR)
133 res = YPERR_ACCESS;
134 else
135 res = YPERR_RPC;
136 }
137
138 break;
139 case YPOP_INSERT:
140 upargs.mapname = map;
141 upargs.key.yp_buf_len = keylen;
142 upargs.key.yp_buf_val = key;
143 upargs.datum.yp_buf_len = datalen;
144 upargs.datum.yp_buf_val = data;
145
146 if ((rval = clnt_call(clnt, YPU_INSERT,
147 (xdrproc_t)xdr_ypupdate_args, &upargs,
148 (xdrproc_t)xdr_u_int, &res, timeout)) != RPC_SUCCESS) {
149 if (rval == RPC_AUTHERROR)
150 res = YPERR_ACCESS;
151 else
152 res = YPERR_RPC;
153 }
154
155 break;
156 case YPOP_DELETE:
157 delargs.mapname = map;
158 delargs.key.yp_buf_len = keylen;
159 delargs.key.yp_buf_val = key;
160
161 if ((rval = clnt_call(clnt, YPU_DELETE,
162 (xdrproc_t)xdr_ypdelete_args, &delargs,
163 (xdrproc_t)xdr_u_int, &res, timeout)) != RPC_SUCCESS) {
164 if (rval == RPC_AUTHERROR)
165 res = YPERR_ACCESS;
166 else
167 res = YPERR_RPC;
168 }
169
170 break;
171 case YPOP_STORE:
172 upargs.mapname = map;
173 upargs.key.yp_buf_len = keylen;
174 upargs.key.yp_buf_val = key;
175 upargs.datum.yp_buf_len = datalen;
176 upargs.datum.yp_buf_val = data;
177
178 if ((rval = clnt_call(clnt, YPU_STORE,
179 (xdrproc_t)xdr_ypupdate_args, &upargs,
180 (xdrproc_t)xdr_u_int, &res, timeout)) != RPC_SUCCESS) {
181 if (rval == RPC_AUTHERROR)
182 res = YPERR_ACCESS;
183 else
184 res = YPERR_RPC;
185 }
186
187 break;
188 default:
189 res = YPERR_BADARGS;
190 break;
191 }
192
193 /* All done: tear down the connection. */
194 auth_destroy(clnt->cl_auth);
195 clnt_destroy(clnt);
196 free(master);
197
198 return(res);
199 }
200