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