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/*
Copyright (C) 1993, 1994 Free Software Foundation
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
The GNU Hurd is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with the GNU Hurd; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Written by Michael I. Bushnell. */
#include "priv.h"
#include "io_S.h"
#include <assert.h>
kern_return_t
trivfs_S_io_reauthenticate (struct trivfs_protid *cred,
int rendint)
{
struct trivfs_protid *newcred;
uid_t *gen_uids = alloca (sizeof (uid_t) * 20);
uid_t *gen_gids = alloca (sizeof (uid_t) * 20);
uid_t *aux_uids = alloca (sizeof (uid_t) * 20);
uid_t *aux_gids = alloca (sizeof (uid_t) * 20);
u_int genuidlen, gengidlen, auxuidlen, auxgidlen;
uid_t *gubuf, *ggbuf, *aubuf, *agbuf;
error_t err;
int i;
auth_t auth;
if (cred == 0)
return EOPNOTSUPP;
genuidlen = gengidlen = auxuidlen = auxgidlen = 20;
gubuf = gen_uids; ggbuf = gen_gids;
aubuf = aux_uids; agbuf = aux_gids;
newcred = ports_allocate_port (sizeof (struct trivfs_protid),
trivfs_protid_porttype);
auth = getauth ();
err = auth_server_authenticate (auth,
ports_get_right (cred),
MACH_MSG_TYPE_MAKE_SEND,
rendint,
ports_get_right (newcred),
MACH_MSG_TYPE_MAKE_SEND,
&gen_uids, &genuidlen,
&aux_uids, &auxuidlen,
&gen_gids, &gengidlen,
&aux_gids, &auxgidlen);
assert (!err); /* XXX */
mach_port_deallocate (mach_task_self (), auth);
newcred->isroot = 0;
for (i = 0; i < genuidlen; i++)
if (gen_uids[i] == 0)
newcred->isroot = 1;
newcred->cntl = cred->cntl;
ports_port_ref (newcred->cntl);
err = io_restrict_auth (newcred->cntl->underlying, &newcred->realnode,
gen_uids, genuidlen, gen_gids, gengidlen);
if (err)
newcred->realnode = MACH_PORT_NULL;
if (gubuf != gen_uids)
vm_deallocate (mach_task_self (), (u_int) gen_uids,
genuidlen * sizeof (uid_t));
if (ggbuf != gen_gids)
vm_deallocate (mach_task_self (), (u_int) gen_gids,
gengidlen * sizeof (uid_t));
if (aubuf != aux_uids)
vm_deallocate (mach_task_self (), (u_int) aux_uids,
auxuidlen * sizeof (uid_t));
if (agbuf != aux_gids)
vm_deallocate (mach_task_self (), (u_int) aux_gids,
auxgidlen * sizeof (uid_t));
return 0;
}
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