1 /* $NetBSD: authunix_prot.c,v 1.12 2000/01/22 22:19:17 mycroft Exp $ */
4 * SPDX-License-Identifier: BSD-3-Clause
6 * Copyright (c) 2009, Sun Microsystems, Inc.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are met:
11 * - Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 * - Redistributions in binary form must reproduce the above copyright notice,
14 * this list of conditions and the following disclaimer in the documentation
15 * and/or other materials provided with the distribution.
16 * - Neither the name of Sun Microsystems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/cdefs.h>
36 * XDR for UNIX style authentication parameters for RPC
38 * Copyright (C) 1984, Sun Microsystems, Inc.
41 #include <sys/param.h>
43 #include <sys/kernel.h>
44 #include <sys/systm.h>
45 #include <sys/ucred.h>
47 #include <rpc/types.h>
51 #include <rpc/rpc_com.h>
53 /* gids compose part of a credential; there may not be more than 16 of them */
57 * XDR for unix authentication parameters.
60 xdr_authunix_parms(XDR *xdrs, uint32_t *time, struct xucred *cred)
65 char hostbuf[MAXHOSTNAMELEN];
67 if (xdrs->x_op == XDR_ENCODE) {
69 * Restrict name length to 255 according to RFC 1057.
71 getcredhostname(NULL, hostbuf, sizeof(hostbuf));
72 namelen = strlen(hostbuf);
80 if (!xdr_uint32_t(xdrs, time)
81 || !xdr_uint32_t(xdrs, &namelen))
85 * Ignore the hostname on decode.
87 if (xdrs->x_op == XDR_ENCODE) {
88 if (!xdr_opaque(xdrs, hostbuf, namelen))
91 xdr_setpos(xdrs, xdr_getpos(xdrs) + RNDUP(namelen));
94 if (!xdr_uint32_t(xdrs, &cred->cr_uid))
96 if (!xdr_uint32_t(xdrs, &cred->cr_groups[0]))
99 if (xdrs->x_op == XDR_ENCODE) {
100 ngroups = cred->cr_ngroups - 1;
105 if (!xdr_uint32_t(xdrs, &ngroups))
107 for (i = 0; i < ngroups; i++) {
108 if (i + 1 < ngroups_max + 1) {
109 if (!xdr_uint32_t(xdrs, &cred->cr_groups[i + 1]))
112 if (!xdr_uint32_t(xdrs, &junk))
117 if (xdrs->x_op == XDR_DECODE) {
118 if (ngroups + 1 > ngroups_max + 1)
119 cred->cr_ngroups = ngroups_max + 1;
121 cred->cr_ngroups = ngroups + 1;