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/* Hurd standard password server.
Copyright (C) 1999, 2013 Free Software Foundation
Written by Mark Kettenis.
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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include <argp.h>
#include <assert.h>
#include <errno.h>
#include <error.h>
#include <stdlib.h>
#include <string.h>
#include <hurd.h>
#include <hurd/auth.h>
#include <hurd/ports.h>
#include <hurd/trivfs.h>
#include <ugids.h>
#include <version.h>
#include "password_S.h"
const char *argp_program_version = STANDARD_HURD_VERSION (password);
/* Port bucket we service requests on. */
struct port_bucket *port_bucket;
/* Our port classes. */
struct port_class *trivfs_control_class;
struct port_class *trivfs_protid_class;
/* Trivfs hooks. */
int trivfs_fstype = FSTYPE_MISC;
int trivfs_fsid = 0;
int trivfs_support_read = 0;
int trivfs_support_write = 0;
int trivfs_support_exec = 0;
int trivfs_allow_open = 0;
static int
password_demuxer (mach_msg_header_t *inp, mach_msg_header_t *outp)
{
extern int password_server (mach_msg_header_t *inp, mach_msg_header_t *outp);
return password_server (inp, outp) || trivfs_demuxer (inp, outp);
}
int
main (int argc, char *argv[])
{
error_t err;
mach_port_t bootstrap;
struct trivfs_control *fsys;
const struct argp argp = { 0, 0, 0, "Hurd standard password server." };
argp_parse (&argp, argc, argv, 0, 0, 0);
task_get_bootstrap_port (mach_task_self (), &bootstrap);
if (bootstrap == MACH_PORT_NULL)
error (1, 0, "must be started as a translator");
err = trivfs_add_port_bucket (&port_bucket);
if (err)
error (1, 0, "error creating port bucket");
err = trivfs_add_control_port_class (&trivfs_control_class);
if (err)
error (1, 0, "error creating control port class");
err = trivfs_add_protid_port_class (&trivfs_protid_class);
if (err)
error (1, 0, "error creating protid port class");
/* Reply to our parent. */
err = trivfs_startup (bootstrap, 0,
trivfs_control_class, port_bucket,
trivfs_protid_class, port_bucket,
&fsys);
mach_port_deallocate (mach_task_self (), bootstrap);
if (err)
error (3, err, "Contacting parent");
/* Launch. */
do
ports_manage_port_operations_multithread (port_bucket, password_demuxer,
2 * 60 * 1000,
10 * 60 * 1000,
0);
/* That returns when 10 minutes pass without an RPC. Try shutting down
as if sent fsys_goaway; if we have any users who need us to stay
around, this returns EBUSY and we loop to service more RPCs. */
while (trivfs_goaway (fsys, 0));
return 0;
}
void
trivfs_modify_stat (struct trivfs_protid *cred, struct stat *st)
{
}
error_t
trivfs_goaway (struct trivfs_control *fsys, int flags)
{
int count;
/* Stop new requests. */
ports_inhibit_class_rpcs (trivfs_control_class);
ports_inhibit_class_rpcs (trivfs_protid_class);
/* Are there any extant user ports for the /servers/password file? */
count = ports_count_class (trivfs_protid_class);
if (count > 0 && !(flags & FSYS_GOAWAY_FORCE))
{
/* We won't go away, so start things going again... */
ports_enable_class (trivfs_protid_class);
ports_resume_class_rpcs (trivfs_control_class);
ports_resume_class_rpcs (trivfs_protid_class);
return EBUSY;
}
exit (0);
}
/* Implement password_check_user as described in <hurd/password.defs>. */
kern_return_t
S_password_check_user (struct trivfs_protid *cred, uid_t user, char *pw,
mach_port_t *port, mach_msg_type_name_t *port_type)
{
struct ugids ugids = UGIDS_INIT;
auth_t auth;
error_t err;
char *getpass (const char *prompt, uid_t id, int is_group,
void *pwd_or_group, void *hook)
{
assert (! is_group && id == user);
return strdup (pw);
}
if (! cred)
return EOPNOTSUPP;
if (cred->pi.bucket != port_bucket ||
cred->pi.class != trivfs_protid_class)
{
ports_port_deref (cred);
return EOPNOTSUPP;
}
/* Verify password. */
err = ugids_add_user (&ugids, user, 1);
if (!err)
err = ugids_verify (&ugids, 0, 0, getpass, 0, 0, 0);
if (!err)
{
auth = getauth ();
err = auth_makeauth (auth, 0, MACH_MSG_TYPE_COPY_SEND, 0,
ugids.eff_uids.ids, ugids.eff_uids.num,
ugids.avail_uids.ids, ugids.avail_uids.num,
ugids.eff_gids.ids, ugids.eff_gids.num,
ugids.avail_gids.ids, ugids.avail_gids.num,
port);
mach_port_deallocate (mach_task_self (), auth);
*port_type = MACH_MSG_TYPE_MOVE_SEND;
}
ugids_fini (&ugids);
return err;
}
/* Implement password_check_group as described in <hurd/password.defs>. */
kern_return_t
S_password_check_group (struct trivfs_protid *cred, uid_t group, char *pw,
mach_port_t *port, mach_msg_type_name_t *port_type)
{
struct ugids ugids = UGIDS_INIT;
auth_t auth;
error_t err;
char *getpass (const char *prompt, uid_t id, int is_group,
void *pwd_or_group, void *hook)
{
assert (is_group && id == group);
return strdup (pw);
}
if (! cred)
return EOPNOTSUPP;
if (cred->pi.bucket != port_bucket ||
cred->pi.class != trivfs_protid_class)
{
ports_port_deref (cred);
return EOPNOTSUPP;
}
/* Verify password. */
err = ugids_add_gid (&ugids, group, 1);
if (!err)
err = ugids_verify (&ugids, 0, 0, getpass, 0, 0, 0);
if (!err)
{
auth = getauth ();
err = auth_makeauth (auth, 0, MACH_MSG_TYPE_COPY_SEND, 0,
ugids.eff_uids.ids, ugids.eff_uids.num,
ugids.avail_uids.ids, ugids.avail_uids.num,
ugids.eff_gids.ids, ugids.eff_gids.num,
ugids.avail_gids.ids, ugids.avail_gids.num,
port);
mach_port_deallocate (mach_task_self (), auth);
*port_type = MACH_MSG_TYPE_MOVE_SEND;
}
ugids_fini (&ugids);
return err;
}
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