1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1989 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * Portions of this source code were derived from Berkeley 4.3 BSD 32 * under license from the Regents of the University of California. 33 */ 34 35 #ident "%Z%%M% %I% %E% SMI" 36 37 /* 38 * svc_auth_unix.c 39 * Handles UNIX flavor authentication parameters on the service side of rpc. 40 * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT. 41 * _svcauth_unix does full blown unix style uid, gid+gids auth, 42 * _svcauth_short uses a shorthand auth to index into a cache of longhand auths. 43 * Note: the shorthand has been gutted for efficiency. 44 */ 45 46 #include <sys/param.h> 47 #include <sys/types.h> 48 #include <sys/time.h> 49 #include <sys/systm.h> 50 #include <sys/stream.h> 51 #include <sys/stropts.h> 52 #include <sys/strsubr.h> 53 #include <sys/tiuser.h> 54 #include <sys/tihdr.h> 55 #include <sys/t_kuser.h> 56 #include <sys/cmn_err.h> 57 58 #include <rpc/types.h> 59 #include <rpc/xdr.h> 60 #include <rpc/auth.h> 61 #include <rpc/clnt.h> 62 #include <rpc/rpc_msg.h> 63 #include <rpc/svc.h> 64 #include <rpc/auth_unix.h> 65 #include <rpc/svc_auth.h> 66 67 68 /* 69 * Unix longhand authenticator 70 */ 71 enum auth_stat 72 _svcauth_unix(struct svc_req *rqst, struct rpc_msg *msg) 73 { 74 enum auth_stat stat; 75 XDR xdrs; 76 struct authunix_parms *aup; 77 int32_t *buf; 78 struct area { 79 struct authunix_parms area_aup; 80 char area_machname[MAX_MACHINE_NAME+1]; 81 u_int area_gids[NGRPS]; 82 } *area; 83 u_int auth_len; 84 u_int str_len, gid_len; 85 int i; 86 87 /* LINTED pointer alignment */ 88 area = (struct area *) rqst->rq_clntcred; 89 aup = &area->area_aup; 90 aup->aup_machname = area->area_machname; 91 aup->aup_gids = (gid_t *)area->area_gids; 92 auth_len = (u_int)msg->rm_call.cb_cred.oa_length; 93 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len, 94 XDR_DECODE); 95 buf = XDR_INLINE(&xdrs, auth_len); 96 if (buf != NULL) { 97 aup->aup_time = IXDR_GET_INT32(buf); 98 str_len = IXDR_GET_U_INT32(buf); 99 if (str_len > MAX_MACHINE_NAME) { 100 stat = AUTH_BADCRED; 101 goto done; 102 } 103 bcopy((caddr_t)buf, aup->aup_machname, (u_int)str_len); 104 aup->aup_machname[str_len] = 0; 105 str_len = RNDUP(str_len); 106 buf += str_len / sizeof (int32_t); 107 aup->aup_uid = IXDR_GET_INT32(buf); 108 aup->aup_gid = IXDR_GET_INT32(buf); 109 gid_len = IXDR_GET_U_INT32(buf); 110 if (gid_len > NGRPS) { 111 stat = AUTH_BADCRED; 112 goto done; 113 } 114 aup->aup_len = gid_len; 115 for (i = 0; i < gid_len; i++) { 116 aup->aup_gids[i] = IXDR_GET_INT32(buf); 117 } 118 /* 119 * five is the smallest unix credentials structure - 120 * timestamp, hostname len (0), uid, gid, and gids len (0). 121 */ 122 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { 123 printf("bad auth_len gid %d str %d auth %d", 124 gid_len, str_len, auth_len); 125 stat = AUTH_BADCRED; 126 goto done; 127 } 128 } else if (! xdr_authunix_parms(&xdrs, aup)) { 129 xdrs.x_op = XDR_FREE; 130 (void) xdr_authunix_parms(&xdrs, aup); 131 stat = AUTH_BADCRED; 132 goto done; 133 } 134 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; 135 rqst->rq_xprt->xp_verf.oa_length = 0; 136 stat = AUTH_OK; 137 done: 138 XDR_DESTROY(&xdrs); 139 return (stat); 140 } 141 142 143 /* 144 * Shorthand unix authenticator 145 * Looks up longhand in a cache. 146 */ 147 /* ARGSUSED */ 148 enum auth_stat 149 _svcauth_short(struct svc_req *rqst, struct rpc_msg *msg) 150 { 151 return (AUTH_REJECTEDCRED); 152 } 153