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- /* $NetBSD: authunix_prot.c,v 1.12 2000/01/22 22:19:17 mycroft Exp $ */
- /*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 2009, Sun Microsystems, Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- * - Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * - Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- * - Neither the name of Sun Microsystems, Inc. nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
- #if defined(LIBC_SCCS) && !defined(lint)
- static char *sccsid2 = "@(#)authunix_prot.c 1.15 87/08/11 Copyr 1984 Sun Micro";
- static char *sccsid = "@(#)authunix_prot.c 2.1 88/07/29 4.0 RPCSRC";
- #endif
- #include <sys/cdefs.h>
- __FBSDID("$FreeBSD$");
- /*
- * authunix_prot.c
- * XDR for UNIX style authentication parameters for RPC
- *
- * Copyright (C) 1984, Sun Microsystems, Inc.
- */
- #include <sys/param.h>
- #include <sys/jail.h>
- #include <sys/kernel.h>
- #include <sys/systm.h>
- #include <sys/ucred.h>
- #include <rpc/types.h>
- #include <rpc/xdr.h>
- #include <rpc/auth.h>
- #include <rpc/rpc_com.h>
- /* gids compose part of a credential; there may not be more than 16 of them */
- #define NGRPS 16
- /*
- * XDR for unix authentication parameters.
- */
- bool_t
- xdr_authunix_parms(XDR *xdrs, uint32_t *time, struct xucred *cred)
- {
- uint32_t namelen;
- uint32_t ngroups, i;
- uint32_t junk;
- char hostbuf[MAXHOSTNAMELEN];
- if (xdrs->x_op == XDR_ENCODE) {
- /*
- * Restrict name length to 255 according to RFC 1057.
- */
- getcredhostname(NULL, hostbuf, sizeof(hostbuf));
- namelen = strlen(hostbuf);
- if (namelen > 255)
- namelen = 255;
- } else {
- namelen = 0;
- }
- junk = 0;
- if (!xdr_uint32_t(xdrs, time)
- || !xdr_uint32_t(xdrs, &namelen))
- return (FALSE);
- /*
- * Ignore the hostname on decode.
- */
- if (xdrs->x_op == XDR_ENCODE) {
- if (!xdr_opaque(xdrs, hostbuf, namelen))
- return (FALSE);
- } else {
- xdr_setpos(xdrs, xdr_getpos(xdrs) + RNDUP(namelen));
- }
- if (!xdr_uint32_t(xdrs, &cred->cr_uid))
- return (FALSE);
- if (!xdr_uint32_t(xdrs, &cred->cr_groups[0]))
- return (FALSE);
- if (xdrs->x_op == XDR_ENCODE) {
- ngroups = cred->cr_ngroups - 1;
- if (ngroups > NGRPS)
- ngroups = NGRPS;
- }
- if (!xdr_uint32_t(xdrs, &ngroups))
- return (FALSE);
- for (i = 0; i < ngroups; i++) {
- if (i + 1 < ngroups_max + 1) {
- if (!xdr_uint32_t(xdrs, &cred->cr_groups[i + 1]))
- return (FALSE);
- } else {
- if (!xdr_uint32_t(xdrs, &junk))
- return (FALSE);
- }
- }
- if (xdrs->x_op == XDR_DECODE) {
- if (ngroups + 1 > ngroups_max + 1)
- cred->cr_ngroups = ngroups_max + 1;
- else
- cred->cr_ngroups = ngroups + 1;
- }
- return (TRUE);
- }
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