1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2009, Sun Microsystems, Inc. 5 * 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 are met: 9 * - Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * - Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * - Neither the name of Sun Microsystems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #if defined(LIBC_SCCS) && !defined(lint) 32 static char *sccsid2 = "@(#)svc_auth_unix.c 1.28 88/02/08 Copyr 1984 Sun Micro"; 33 static char *sccsid = "@(#)svc_auth_unix.c 2.3 88/08/01 4.0 RPCSRC"; 34 #endif 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 /* 39 * svc_auth_unix.c 40 * Handles UNIX flavor authentication parameters on the service side of rpc. 41 * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT. 42 * _svcauth_unix does full blown unix style uid,gid+gids auth, 43 * _svcauth_short uses a shorthand auth to index into a cache of longhand auths. 44 * Note: the shorthand has been gutted for efficiency. 45 * 46 * Copyright (C) 1984, Sun Microsystems, Inc. 47 */ 48 49 #include "namespace.h" 50 #include <assert.h> 51 #include <stdio.h> 52 #include <string.h> 53 54 #include <rpc/rpc.h> 55 #include "un-namespace.h" 56 57 /* 58 * Unix longhand authenticator 59 */ 60 enum auth_stat 61 _svcauth_unix(struct svc_req *rqst, struct rpc_msg *msg) 62 { 63 enum auth_stat stat; 64 XDR xdrs; 65 struct authunix_parms *aup; 66 int32_t *buf; 67 struct area { 68 struct authunix_parms area_aup; 69 char area_machname[MAX_MACHINE_NAME+1]; 70 u_int area_gids[NGRPS]; 71 } *area; 72 u_int auth_len; 73 size_t str_len, gid_len; 74 u_int i; 75 76 assert(rqst != NULL); 77 assert(msg != NULL); 78 79 area = (struct area *) rqst->rq_clntcred; 80 aup = &area->area_aup; 81 aup->aup_machname = area->area_machname; 82 aup->aup_gids = area->area_gids; 83 auth_len = (u_int)msg->rm_call.cb_cred.oa_length; 84 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,XDR_DECODE); 85 buf = XDR_INLINE(&xdrs, auth_len); 86 if (buf != NULL) { 87 aup->aup_time = IXDR_GET_INT32(buf); 88 str_len = (size_t)IXDR_GET_U_INT32(buf); 89 if (str_len > MAX_MACHINE_NAME) { 90 stat = AUTH_BADCRED; 91 goto done; 92 } 93 memmove(aup->aup_machname, buf, str_len); 94 aup->aup_machname[str_len] = 0; 95 str_len = RNDUP(str_len); 96 buf += str_len / sizeof (int32_t); 97 aup->aup_uid = (int)IXDR_GET_INT32(buf); 98 aup->aup_gid = (int)IXDR_GET_INT32(buf); 99 gid_len = (size_t)IXDR_GET_U_INT32(buf); 100 if (gid_len > NGRPS) { 101 stat = AUTH_BADCRED; 102 goto done; 103 } 104 aup->aup_len = gid_len; 105 for (i = 0; i < gid_len; i++) { 106 aup->aup_gids[i] = (int)IXDR_GET_INT32(buf); 107 } 108 /* 109 * five is the smallest unix credentials structure - 110 * timestamp, hostname len (0), uid, gid, and gids len (0). 111 */ 112 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { 113 (void) printf("bad auth_len gid %ld str %ld auth %u\n", 114 (long)gid_len, (long)str_len, auth_len); 115 stat = AUTH_BADCRED; 116 goto done; 117 } 118 } else if (! xdr_authunix_parms(&xdrs, aup)) { 119 xdrs.x_op = XDR_FREE; 120 (void)xdr_authunix_parms(&xdrs, aup); 121 stat = AUTH_BADCRED; 122 goto done; 123 } 124 125 /* get the verifier */ 126 if ((u_int)msg->rm_call.cb_verf.oa_length) { 127 rqst->rq_xprt->xp_verf.oa_flavor = 128 msg->rm_call.cb_verf.oa_flavor; 129 rqst->rq_xprt->xp_verf.oa_base = 130 msg->rm_call.cb_verf.oa_base; 131 rqst->rq_xprt->xp_verf.oa_length = 132 msg->rm_call.cb_verf.oa_length; 133 } else { 134 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; 135 rqst->rq_xprt->xp_verf.oa_length = 0; 136 } 137 stat = AUTH_OK; 138 done: 139 XDR_DESTROY(&xdrs); 140 return (stat); 141 } 142 143 144 /* 145 * Shorthand unix authenticator 146 * Looks up longhand in a cache. 147 */ 148 /*ARGSUSED*/ 149 enum auth_stat 150 _svcauth_short(struct svc_req *rqst, struct rpc_msg *msg) 151 { 152 return (AUTH_REJECTEDCRED); 153 } 154