1 /* @(#)svc_auth_unix.c 2.3 88/08/01 4.0 RPCSRC; from 1.28 88/02/08 SMI */
2 /*
3 * Copyright (c) 2010, Oracle America, Inc.
4 *
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 *
18 * * Neither the name of the "Oracle America, Inc." nor the names of
19 * its contributors may be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
23 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
25 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
28 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
29 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
30 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
31 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
32 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34 #if !defined(lint) && defined(SCCSIDS)
35 static char sccsid[] = "@(#)svc_auth_unix.c 1.28 88/02/08 Copyr 1984 Sun Micro";
36 #endif
37
38 /*
39 * svc_auth_unix.c
40 * Handles UNIX flavor authentication parameters on the service side of rpc.
41 * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT.
42 * _svcauth_unix does full blown unix style uid,gid+gids auth,
43 * _svcauth_short uses a shorthand auth to index into a cache of longhand auths.
44 * Note: the shorthand has been gutted for efficiency.
45 */
46
47 #include <stdio.h>
48 #include <string.h>
49 #include <gssrpc/rpc.h>
50
51 /*
52 * Unix longhand authenticator
53 */
54 enum auth_stat
gssrpc__svcauth_unix(struct svc_req * rqst,struct rpc_msg * msg,bool_t * dispatch)55 gssrpc__svcauth_unix(
56 struct svc_req *rqst,
57 struct rpc_msg *msg,
58 bool_t *dispatch)
59 {
60 enum auth_stat stat;
61 XDR xdrs;
62 struct authunix_parms *aup;
63 rpc_inline_t *buf;
64 struct area {
65 struct authunix_parms area_aup;
66 char area_machname[MAX_MACHINE_NAME+1];
67 int area_gids[NGRPS];
68 } *area;
69 u_int auth_len, str_len, gid_len, i;
70
71 rqst->rq_xprt->xp_auth = &svc_auth_none;
72
73 area = (struct area *) rqst->rq_clntcred;
74 aup = &area->area_aup;
75 aup->aup_machname = area->area_machname;
76 aup->aup_gids = area->area_gids;
77 auth_len = msg->rm_call.cb_cred.oa_length;
78 if (auth_len > INT_MAX)
79 return AUTH_BADCRED;
80 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,XDR_DECODE);
81 buf = XDR_INLINE(&xdrs, (int)auth_len);
82 if (buf != NULL) {
83 aup->aup_time = IXDR_GET_LONG(buf);
84 str_len = IXDR_GET_U_LONG(buf);
85 if (str_len > MAX_MACHINE_NAME) {
86 stat = AUTH_BADCRED;
87 goto done;
88 }
89 memmove(aup->aup_machname, buf, str_len);
90 aup->aup_machname[str_len] = 0;
91 str_len = RNDUP(str_len);
92 buf += str_len / BYTES_PER_XDR_UNIT;
93 aup->aup_uid = IXDR_GET_LONG(buf);
94 aup->aup_gid = IXDR_GET_LONG(buf);
95 gid_len = IXDR_GET_U_LONG(buf);
96 if (gid_len > NGRPS) {
97 stat = AUTH_BADCRED;
98 goto done;
99 }
100 aup->aup_len = gid_len;
101 for (i = 0; i < gid_len; i++) {
102 aup->aup_gids[i] = IXDR_GET_LONG(buf);
103 }
104 /*
105 * five is the smallest unix credentials structure -
106 * timestamp, hostname len (0), uid, gid, and gids len (0).
107 */
108 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) {
109 (void) printf("bad auth_len gid %u str %u auth %u\n",
110 gid_len, str_len, auth_len);
111 stat = AUTH_BADCRED;
112 goto done;
113 }
114 } else if (! xdr_authunix_parms(&xdrs, aup)) {
115 xdrs.x_op = XDR_FREE;
116 (void)xdr_authunix_parms(&xdrs, aup);
117 stat = AUTH_BADCRED;
118 goto done;
119 }
120 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL;
121 rqst->rq_xprt->xp_verf.oa_length = 0;
122 stat = AUTH_OK;
123 done:
124 XDR_DESTROY(&xdrs);
125 return (stat);
126 }
127
128
129 /*
130 * Shorthand unix authenticator
131 * Looks up longhand in a cache.
132 */
133 /*ARGSUSED*/
134 enum auth_stat
gssrpc__svcauth_short(struct svc_req * rqst,struct rpc_msg * msg,bool_t * dispatch)135 gssrpc__svcauth_short(
136 struct svc_req *rqst,
137 struct rpc_msg *msg,
138 bool_t *dispatch)
139 {
140 rqst->rq_xprt->xp_auth = &svc_auth_none;
141 return (AUTH_REJECTEDCRED);
142 }
143