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
_svcauth_unix(struct svc_req * rqst,struct rpc_msg * msg)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
_svcauth_short(struct svc_req * rqst,struct rpc_msg * msg)149 _svcauth_short(struct svc_req *rqst, struct rpc_msg *msg)
150 {
151 return (AUTH_REJECTEDCRED);
152 }
153