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 2006 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 29 /* All Rights Reserved */ 30 /* 31 * Portions of this source code were derived from Berkeley 32 * 4.3 BSD under license from the Regents of the University of 33 * California. 34 */ 35 36 #pragma ident "%Z%%M% %I% %E% SMI" 37 38 /* 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 "mt.h" 49 #include <stdio.h> 50 #include <rpc/rpc.h> 51 #include <syslog.h> 52 #include <sys/types.h> 53 #include <string.h> 54 55 /* 56 * System (Unix) longhand authenticator 57 */ 58 enum auth_stat 59 __svcauth_sys(struct svc_req *rqst, struct rpc_msg *msg) 60 { 61 enum auth_stat stat; 62 XDR xdrs; 63 struct authsys_parms *aup; 64 rpc_inline_t *buf; 65 struct area { 66 struct authsys_parms area_aup; 67 char area_machname[MAX_MACHINE_NAME+1]; 68 gid_t area_gids[NGRPS]; 69 } *area; 70 uint_t auth_len; 71 uint_t str_len, gid_len; 72 int i; 73 74 /* LINTED pointer cast */ 75 area = (struct area *)rqst->rq_clntcred; 76 aup = &area->area_aup; 77 aup->aup_machname = area->area_machname; 78 aup->aup_gids = area->area_gids; 79 auth_len = (uint_t)msg->rm_call.cb_cred.oa_length; 80 if (auth_len == 0) 81 return (AUTH_BADCRED); 82 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len, 83 XDR_DECODE); 84 buf = XDR_INLINE(&xdrs, auth_len); 85 if (buf != NULL) { 86 aup->aup_time = IXDR_GET_INT32(buf); 87 str_len = IXDR_GET_U_INT32(buf); 88 if (str_len > MAX_MACHINE_NAME) { 89 stat = AUTH_BADCRED; 90 goto done; 91 } 92 (void) memcpy(aup->aup_machname, buf, str_len); 93 aup->aup_machname[str_len] = 0; 94 str_len = RNDUP(str_len); 95 buf += str_len / (int)sizeof (int32_t); 96 aup->aup_uid = IXDR_GET_INT32(buf); 97 aup->aup_gid = IXDR_GET_INT32(buf); 98 gid_len = IXDR_GET_U_INT32(buf); 99 if (gid_len > NGRPS) { 100 stat = AUTH_BADCRED; 101 goto done; 102 } 103 aup->aup_len = gid_len; 104 for (i = 0; i < gid_len; i++) { 105 aup->aup_gids[i] = (gid_t)IXDR_GET_INT32(buf); 106 } 107 /* 108 * five is the smallest unix credentials structure - 109 * timestamp, hostname len (0), uid, gid, and gids len (0). 110 */ 111 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { 112 (void) syslog(LOG_ERR, 113 "bad auth_len gid %d str %d auth %d", 114 gid_len, str_len, auth_len); 115 stat = AUTH_BADCRED; 116 goto done; 117 } 118 } else if (! xdr_authsys_parms(&xdrs, aup)) { 119 xdrs.x_op = XDR_FREE; 120 (void) xdr_authsys_parms(&xdrs, aup); 121 stat = AUTH_BADCRED; 122 goto done; 123 } 124 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; 125 rqst->rq_xprt->xp_verf.oa_length = 0; 126 stat = AUTH_OK; 127 done: 128 XDR_DESTROY(&xdrs); 129 return (stat); 130 } 131 132 /* 133 * Shorthand unix authenticator 134 * Looks up longhand in a cache. 135 */ 136 /*ARGSUSED*/ 137 enum auth_stat 138 __svcauth_short(struct svc_req *rqst, struct rpc_msg *msg) 139 { 140 return (AUTH_REJECTEDCRED); 141 } 142 143 /* 144 * Unix longhand authenticator. Will be obsoleted 145 */ 146 enum auth_stat 147 __svcauth_unix(struct svc_req *rqst, struct rpc_msg *msg) 148 { 149 return (__svcauth_sys(rqst, msg)); 150 } 151