1 /*- 2 * Copyright (c) 2009, Sun Microsystems, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * - Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * - Redistributions in binary form must reproduce the above copyright notice, 10 * this list of conditions and the following disclaimer in the documentation 11 * and/or other materials provided with the distribution. 12 * - Neither the name of Sun Microsystems, Inc. nor the names of its 13 * contributors may be used to endorse or promote products derived 14 * from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * 27 * POSSIBILITY OF SUCH DAMAGE. 28 * @(#)svc_auth_unix.c 1.28 88/02/08 Copyr 1984 Sun Micro 29 * @(#)svc_auth_unix.c 2.3 88/08/01 4.0 RPCSRC 30 * $FreeBSD: src/lib/libc/rpc/svc_auth_unix.c,v 1.11 2004/10/16 06:11:35 obrien Exp $ 31 */ 32 33 /* 34 * svc_auth_unix.c 35 * Handles UNIX flavor authentication parameters on the service side of rpc. 36 * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT. 37 * _svcauth_unix does full blown unix style uid,gid+gids auth, 38 * _svcauth_short uses a shorthand auth to index into a cache of longhand auths. 39 * Note: the shorthand has been gutted for efficiency. 40 * 41 * Copyright (C) 1984, Sun Microsystems, Inc. 42 */ 43 44 #include "namespace.h" 45 #include <assert.h> 46 #include <stdio.h> 47 #include <string.h> 48 49 #include <rpc/rpc.h> 50 #include "un-namespace.h" 51 52 /* 53 * Unix longhand authenticator 54 */ 55 enum auth_stat 56 _svcauth_unix(struct svc_req *rqst, struct rpc_msg *msg) 57 { 58 enum auth_stat stat; 59 XDR xdrs; 60 struct authunix_parms *aup; 61 int32_t *buf; 62 struct area { 63 struct authunix_parms area_aup; 64 char area_machname[MAX_MACHINE_NAME+1]; 65 int area_gids[NGRPS]; 66 } *area; 67 u_int auth_len; 68 size_t str_len, gid_len; 69 u_int i; 70 71 assert(rqst != NULL); 72 assert(msg != NULL); 73 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 = (u_int)msg->rm_call.cb_cred.oa_length; 79 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,XDR_DECODE); 80 buf = XDR_INLINE(&xdrs, auth_len); 81 if (buf != NULL) { 82 aup->aup_time = IXDR_GET_INT32(buf); 83 str_len = (size_t)IXDR_GET_U_INT32(buf); 84 if (str_len > MAX_MACHINE_NAME) { 85 stat = AUTH_BADCRED; 86 goto done; 87 } 88 memmove(aup->aup_machname, buf, str_len); 89 aup->aup_machname[str_len] = 0; 90 str_len = RNDUP(str_len); 91 buf += str_len / sizeof (int32_t); 92 aup->aup_uid = (int)IXDR_GET_INT32(buf); 93 aup->aup_gid = (int)IXDR_GET_INT32(buf); 94 gid_len = (size_t)IXDR_GET_U_INT32(buf); 95 if (gid_len > NGRPS) { 96 stat = AUTH_BADCRED; 97 goto done; 98 } 99 aup->aup_len = gid_len; 100 for (i = 0; i < gid_len; i++) { 101 aup->aup_gids[i] = (int)IXDR_GET_INT32(buf); 102 } 103 /* 104 * five is the smallest unix credentials structure - 105 * timestamp, hostname len (0), uid, gid, and gids len (0). 106 */ 107 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { 108 printf("bad auth_len gid %ld str %ld auth %u\n", 109 (long)gid_len, (long)str_len, auth_len); 110 stat = AUTH_BADCRED; 111 goto done; 112 } 113 } else if (! xdr_authunix_parms(&xdrs, aup)) { 114 xdrs.x_op = XDR_FREE; 115 xdr_authunix_parms(&xdrs, aup); 116 stat = AUTH_BADCRED; 117 goto done; 118 } 119 120 /* get the verifier */ 121 if ((u_int)msg->rm_call.cb_verf.oa_length) { 122 rqst->rq_xprt->xp_verf.oa_flavor = 123 msg->rm_call.cb_verf.oa_flavor; 124 rqst->rq_xprt->xp_verf.oa_base = 125 msg->rm_call.cb_verf.oa_base; 126 rqst->rq_xprt->xp_verf.oa_length = 127 msg->rm_call.cb_verf.oa_length; 128 } else { 129 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; 130 rqst->rq_xprt->xp_verf.oa_length = 0; 131 } 132 stat = AUTH_OK; 133 done: 134 XDR_DESTROY(&xdrs); 135 return (stat); 136 } 137 138 139 /* 140 * Shorthand unix authenticator 141 * Looks up longhand in a cache. 142 */ 143 /*ARGSUSED*/ 144 enum auth_stat 145 _svcauth_short(struct svc_req *rqst __unused, struct rpc_msg *msg __unused) 146 { 147 return (AUTH_REJECTEDCRED); 148 } 149