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/*
Copyright (C) 1993, 1994, 1995, 1996 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>
#include <string.h>
kern_return_t
trivfs_S_io_reauthenticate (struct trivfs_protid *cred,
mach_port_t reply,
mach_msg_type_name_t replytype,
mach_port_t rendport)
{
struct trivfs_protid *newcred;
uid_t gubuf[20], ggbuf[20], aubuf[20], agbuf[20];
uid_t *gen_uids, *gen_gids, *aux_uids, *aux_gids;
u_int genuidlen, gengidlen, auxuidlen, auxgidlen;
error_t err;
int i;
auth_t auth;
mach_port_t newright;
if (cred == 0)
return EOPNOTSUPP;
genuidlen = gengidlen = auxuidlen = auxgidlen = 20;
gen_uids = gubuf;
gen_gids = ggbuf;
aux_uids = aubuf;
aux_gids = agbuf;
do
err = ports_create_port_noinstall (cred->po->cntl->protid_class,
cred->po->cntl->protid_bucket,
sizeof (struct trivfs_protid),
&newcred);
while (err == EINTR);
if (err)
return err;
auth = getauth ();
newright = ports_get_right (newcred);
err = mach_port_insert_right (mach_task_self (), newright, newright,
MACH_MSG_TYPE_MAKE_SEND);
assert_perror (err);
do
err = auth_server_authenticate (auth,
rendport,
MACH_MSG_TYPE_COPY_SEND,
newright,
MACH_MSG_TYPE_COPY_SEND,
&gen_uids, &genuidlen,
&aux_uids, &auxuidlen,
&gen_gids, &gengidlen,
&aux_gids, &auxgidlen);
while (err == EINTR);
mach_port_deallocate (mach_task_self (), rendport);
mach_port_deallocate (mach_task_self (), newright);
mach_port_deallocate (mach_task_self (), auth);
if (err)
{
newcred->isroot = 0;
newcred->uids = malloc (1);
newcred->gids = malloc (1);
newcred->nuids = 0;
newcred->ngids = 0;
}
else
{
newcred->isroot = 0;
for (i = 0; i < genuidlen; i++)
if (gen_uids[i] == 0)
newcred->isroot = 1;
newcred->uids = malloc (genuidlen * sizeof (uid_t));
newcred->gids = malloc (gengidlen * sizeof (uid_t));
bcopy (gen_uids, newcred->uids, genuidlen * sizeof (uid_t));
bcopy (gen_gids, newcred->gids, gengidlen * sizeof (uid_t));
newcred->nuids = genuidlen;
newcred->ngids = gengidlen;
}
newcred->hook = cred->hook;
mutex_lock (&cred->po->cntl->lock);
newcred->po = cred->po;
newcred->po->refcnt++;
mutex_unlock (&cred->po->cntl->lock);
do
err = io_restrict_auth (newcred->po->cntl->underlying, &newcred->realnode,
gen_uids, genuidlen, gen_gids, gengidlen);
while (err == EINTR);
if (!err && trivfs_protid_create_hook)
{
do
err = (*trivfs_protid_create_hook) (newcred);
while (err == EINTR);
if (err)
mach_port_deallocate (mach_task_self (), newcred->realnode);
}
if (err)
/* Signal that the user destroy hook shouldn't be called on NEWCRED. */
newcred->realnode = MACH_PORT_NULL;
mach_port_move_member (mach_task_self (), newcred->pi.port_right,
cred->po->cntl->protid_bucket->portset);
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));
ports_port_deref (newcred);
return err;
}
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