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/* $NetBSD: authunix_prot.c,v 1.12 2000/01/22 22:19:17 mycroft Exp $ */
/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user.
*
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
*
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
#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) {
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)
cred->cr_ngroups = NGROUPS;
else
cred->cr_ngroups = ngroups + 1;
}
return (TRUE);
}
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