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
__svcauth_sys(struct svc_req * rqst,struct rpc_msg * msg)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
__svcauth_short(struct svc_req * rqst,struct rpc_msg * msg)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
__svcauth_unix(struct svc_req * rqst,struct rpc_msg * msg)147 __svcauth_unix(struct svc_req *rqst, struct rpc_msg *msg)
148 {
149 return (__svcauth_sys(rqst, msg));
150 }
151