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 /* 24 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 /* 30 * Portions of this source code were derived from Berkeley 31 * 4.3 BSD under license from the Regents of the University of 32 * California. 33 */ 34 35 #pragma ident "%Z%%M% %I% %E% SMI" 36 37 /* 38 * svc_auth_sys.c 39 * Handles UNIX flavor authentication parameters on the service side of rpc. 40 * There are two svc auth implementations here: AUTH_SYS and AUTH_SHORT. 41 * __svcauth_sys does full blown unix style uid, gid+gids auth, 42 * __svcauth_short uses a shorthand auth to index into a cache of 43 * longhand auths. 44 * Note: the shorthand has been gutted for efficiency. 45 * 46 */ 47 48 #include <stdio.h> 49 #include <rpc/rpc.h> 50 #include <syslog.h> 51 #include <sys/types.h> 52 #include <string.h> 53 54 /* 55 * System (Unix) longhand authenticator 56 */ 57 enum auth_stat 58 __svcauth_sys(struct svc_req *rqst, struct rpc_msg *msg) 59 { 60 enum auth_stat stat; 61 XDR xdrs; 62 struct authsys_parms *aup; 63 rpc_inline_t *buf; 64 struct area { 65 struct authsys_parms area_aup; 66 char area_machname[MAX_MACHINE_NAME+1]; 67 gid_t area_gids[NGRPS]; 68 } *area; 69 uint_t auth_len; 70 uint_t str_len, gid_len; 71 int i; 72 73 /* LINTED pointer cast */ 74 area = (struct area *)rqst->rq_clntcred; 75 aup = &area->area_aup; 76 aup->aup_machname = area->area_machname; 77 aup->aup_gids = area->area_gids; 78 auth_len = (uint_t)msg->rm_call.cb_cred.oa_length; 79 if (auth_len == 0) 80 return (AUTH_BADCRED); 81 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len, 82 XDR_DECODE); 83 buf = XDR_INLINE(&xdrs, auth_len); 84 if (buf != NULL) { 85 aup->aup_time = IXDR_GET_INT32(buf); 86 str_len = IXDR_GET_U_INT32(buf); 87 if (str_len > MAX_MACHINE_NAME) { 88 stat = AUTH_BADCRED; 89 goto done; 90 } 91 (void) memcpy(aup->aup_machname, buf, str_len); 92 aup->aup_machname[str_len] = 0; 93 str_len = RNDUP(str_len); 94 buf += str_len / (int)sizeof (int32_t); 95 aup->aup_uid = IXDR_GET_INT32(buf); 96 aup->aup_gid = IXDR_GET_INT32(buf); 97 gid_len = IXDR_GET_U_INT32(buf); 98 if (gid_len > NGRPS) { 99 stat = AUTH_BADCRED; 100 goto done; 101 } 102 aup->aup_len = gid_len; 103 for (i = 0; i < gid_len; i++) { 104 aup->aup_gids[i] = (gid_t)IXDR_GET_INT32(buf); 105 } 106 /* 107 * five is the smallest unix credentials structure - 108 * timestamp, hostname len (0), uid, gid, and gids len (0). 109 */ 110 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { 111 (void) syslog(LOG_ERR, 112 "bad auth_len gid %d str %d auth %d", 113 gid_len, str_len, auth_len); 114 stat = AUTH_BADCRED; 115 goto done; 116 } 117 } else if (! xdr_authsys_parms(&xdrs, aup)) { 118 xdrs.x_op = XDR_FREE; 119 (void) xdr_authsys_parms(&xdrs, aup); 120 stat = AUTH_BADCRED; 121 goto done; 122 } 123 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; 124 rqst->rq_xprt->xp_verf.oa_length = 0; 125 stat = AUTH_OK; 126 done: 127 XDR_DESTROY(&xdrs); 128 return (stat); 129 } 130 131 /* 132 * Shorthand unix authenticator 133 * Looks up longhand in a cache. 134 */ 135 /*ARGSUSED*/ 136 enum auth_stat 137 __svcauth_short(struct svc_req *rqst, struct rpc_msg *msg) 138 { 139 return (AUTH_REJECTEDCRED); 140 } 141 142 /* 143 * Unix longhand authenticator. Will be obsoleted 144 */ 145 enum auth_stat 146 __svcauth_unix(struct svc_req *rqst, struct rpc_msg *msg) 147 { 148 return (__svcauth_sys(rqst, msg)); 149 } 150