2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2009, Sun Microsystems, Inc.
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31 #if defined(LIBC_SCCS) && !defined(lint)
32 static char *sccsid2 = "@(#)svc_auth_unix.c 1.28 88/02/08 Copyr 1984 Sun Micro";
33 static char *sccsid = "@(#)svc_auth_unix.c 2.3 88/08/01 4.0 RPCSRC";
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
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.
46 * Copyright (C) 1984, Sun Microsystems, Inc.
49 #include "namespace.h"
55 #include "un-namespace.h"
58 * Unix longhand authenticator
61 _svcauth_unix(struct svc_req *rqst, struct rpc_msg *msg)
65 struct authunix_parms *aup;
68 struct authunix_parms area_aup;
69 char area_machname[MAX_MACHINE_NAME+1];
70 u_int area_gids[NGRPS];
73 size_t str_len, gid_len;
79 area = (struct area *) rqst->rq_clntcred;
80 aup = &area->area_aup;
81 aup->aup_machname = area->area_machname;
82 aup->aup_gids = area->area_gids;
83 auth_len = (u_int)msg->rm_call.cb_cred.oa_length;
84 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,XDR_DECODE);
85 buf = XDR_INLINE(&xdrs, auth_len);
87 aup->aup_time = IXDR_GET_INT32(buf);
88 str_len = (size_t)IXDR_GET_U_INT32(buf);
89 if (str_len > MAX_MACHINE_NAME) {
93 memmove(aup->aup_machname, buf, str_len);
94 aup->aup_machname[str_len] = 0;
95 str_len = RNDUP(str_len);
96 buf += str_len / sizeof (int32_t);
97 aup->aup_uid = (int)IXDR_GET_INT32(buf);
98 aup->aup_gid = (int)IXDR_GET_INT32(buf);
99 gid_len = (size_t)IXDR_GET_U_INT32(buf);
100 if (gid_len > NGRPS) {
104 aup->aup_len = gid_len;
105 for (i = 0; i < gid_len; i++) {
106 aup->aup_gids[i] = (int)IXDR_GET_INT32(buf);
109 * five is the smallest unix credentials structure -
110 * timestamp, hostname len (0), uid, gid, and gids len (0).
112 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) {
113 (void) printf("bad auth_len gid %ld str %ld auth %u\n",
114 (long)gid_len, (long)str_len, auth_len);
118 } else if (! xdr_authunix_parms(&xdrs, aup)) {
119 xdrs.x_op = XDR_FREE;
120 (void)xdr_authunix_parms(&xdrs, aup);
125 /* get the verifier */
126 if ((u_int)msg->rm_call.cb_verf.oa_length) {
127 rqst->rq_xprt->xp_verf.oa_flavor =
128 msg->rm_call.cb_verf.oa_flavor;
129 rqst->rq_xprt->xp_verf.oa_base =
130 msg->rm_call.cb_verf.oa_base;
131 rqst->rq_xprt->xp_verf.oa_length =
132 msg->rm_call.cb_verf.oa_length;
134 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL;
135 rqst->rq_xprt->xp_verf.oa_length = 0;
145 * Shorthand unix authenticator
146 * Looks up longhand in a cache.
150 _svcauth_short(struct svc_req *rqst, struct rpc_msg *msg)
152 return (AUTH_REJECTEDCRED);