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/*
Copyright (C) 1996,99,2001,02 Free Software Foundation, Inc.
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "iohelp.h"
#include <hurd/auth.h>
#include <sys/mman.h>
#include <stdlib.h>
/* Conduct a reauthentication transaction, returning a new iouser.
AUTHSERVER is the I/O servers auth port. The rendezvous port
provided by the user is REND_PORT. If the transaction cannot be
completed, return zero, unless PERMIT_FAILURE is non-zero. If
PERMIT_FAILURE is nonzero, then should the transaction fail, return
an iouser that has no ids. The new port to be sent to the user is
newright. */
error_t iohelp_reauth (struct iouser **user,
auth_t authserver, mach_port_t rend_port,
mach_port_t newright, int permit_failure)
{
uid_t gubuf[20], ggbuf[20], aubuf[20], agbuf[20];
uid_t *gen_uids, *gen_gids, *aux_uids, *aux_gids;
size_t genuidlen, gengidlen, auxuidlen, auxgidlen;
error_t err;
struct iouser *new;
*user = new = malloc (sizeof (struct iouser));
if (!new)
return ENOMEM;
new->uids = make_idvec ();
new->gids = make_idvec ();
if (!new->uids || !new->gids)
{
if (new->uids)
idvec_free (new->uids);
if (new->gids)
idvec_free (new->gids);
free (new);
return ENOMEM;
}
genuidlen = gengidlen = auxuidlen = auxgidlen = 20;
gen_uids = gubuf;
gen_gids = ggbuf;
aux_uids = aubuf;
aux_gids = agbuf;
do
err = auth_server_authenticate (authserver,
rend_port,
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);
if (err)
{
if (permit_failure)
genuidlen = gengidlen = 0;
else
goto out;
}
err = idvec_set_ids (new->uids, gen_uids, genuidlen);
if (!err)
err = idvec_set_ids (new->gids, gen_gids, gengidlen);
if (gubuf != gen_uids)
munmap ((caddr_t) gen_uids, genuidlen * sizeof (uid_t));
if (ggbuf != gen_gids)
munmap ((caddr_t) gen_gids, gengidlen * sizeof (uid_t));
if (aubuf != aux_uids)
munmap ((caddr_t) aux_uids, auxuidlen * sizeof (uid_t));
if (agbuf != aux_gids)
munmap ((caddr_t) aux_gids, auxgidlen * sizeof (uid_t));
if (err)
{
out:
idvec_free (new->uids);
idvec_free (new->gids);
free (new);
*user = 0;
return err;
}
*user = new;
return 0;
}
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