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 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