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/*
SSSD
NSS Responder - Data Provider Interfaces
Copyright (C) Simo Sorce <ssorce@redhat.com> 2008
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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
*/
#include <sys/time.h>
#include <time.h>
#include <talloc.h>
#include <security/pam_modules.h>
#include "util/util.h"
#include "responder/common/responder_packet.h"
#include "providers/data_provider.h"
#include "sbus/sbus_client.h"
#include "providers/dp_sbus.h"
#include "responder/pam/pamsrv.h"
static void pam_dp_process_reply(DBusPendingCall *pending, void *ptr)
{
DBusError dbus_error;
DBusMessage* msg;
int ret;
int type;
struct pam_auth_req *preq;
preq = talloc_get_type(ptr, struct pam_auth_req);
dbus_error_init(&dbus_error);
dbus_pending_call_block(pending);
msg = dbus_pending_call_steal_reply(pending);
if (msg == NULL) {
DEBUG(0, ("Severe error. A reply callback was called but no reply was received and no timeout occurred\n"));
preq->pd->pam_status = PAM_SYSTEM_ERR;
goto done;
}
type = dbus_message_get_type(msg);
switch (type) {
case DBUS_MESSAGE_TYPE_METHOD_RETURN:
ret = dp_unpack_pam_response(msg, preq->pd, &dbus_error);
if (!ret) {
DEBUG(0, ("Failed to parse reply.\n"));
preq->pd->pam_status = PAM_SYSTEM_ERR;
goto done;
}
DEBUG(4, ("received: [%d][%s]\n", preq->pd->pam_status, preq->pd->domain));
break;
case DBUS_MESSAGE_TYPE_ERROR:
DEBUG(0, ("Reply error.\n"));
preq->pd->pam_status = PAM_SYSTEM_ERR;
break;
default:
DEBUG(0, ("Default... what now?.\n"));
preq->pd->pam_status = PAM_SYSTEM_ERR;
}
done:
dbus_pending_call_unref(pending);
dbus_message_unref(msg);
preq->callback(preq);
}
int pam_dp_send_req(struct pam_auth_req *preq, int timeout)
{
struct pam_data *pd = preq->pd;
DBusMessage *msg;
DBusPendingCall *pending_reply;
DBusConnection *dbus_conn;
dbus_bool_t ret;
/* double check dp_ctx has actually been initialized.
* in some pathological cases it may happen that nss starts up before
* dp connection code is actually able to establish a connection.
*/
if (!preq->cctx->rctx->dp_conn) {
DEBUG(1, ("The Data Provider connection is not available yet!"
" This maybe a bug, it shouldn't happen!\n"));
return EIO;
}
dbus_conn = sbus_get_connection(preq->cctx->rctx->dp_conn);
msg = dbus_message_new_method_call(NULL,
DP_CLI_PATH,
DP_CLI_INTERFACE,
DP_SRV_METHOD_PAMHANDLER);
if (msg == NULL) {
DEBUG(0,("Out of memory?!\n"));
return ENOMEM;
}
DEBUG(4, ("Sending request with the following data:\n"));
DEBUG_PAM_DATA(4, pd);
ret = dp_pack_pam_request(msg, pd);
if (!ret) {
DEBUG(1,("Failed to build message\n"));
return EIO;
}
ret = dbus_connection_send_with_reply(dbus_conn, msg, &pending_reply, timeout);
if (!ret || pending_reply == NULL) {
/*
* Critical Failure
* We can't communicate on this connection
* We'll drop it using the default destructor.
*/
DEBUG(0, ("D-BUS send failed.\n"));
dbus_message_unref(msg);
return EIO;
}
dbus_pending_call_set_notify(pending_reply,
pam_dp_process_reply, preq, NULL);
dbus_message_unref(msg);
return EOK;
}
static int pam_dp_identity(DBusMessage *message, struct sbus_connection *conn)
{
dbus_uint16_t version = DATA_PROVIDER_VERSION;
dbus_uint16_t clitype = DP_CLI_FRONTEND;
const char *cliname = "PAM";
const char *nullname = "";
DBusMessage *reply;
dbus_bool_t ret;
DEBUG(4,("Sending ID reply: (%d,%d,%s)\n", clitype, version, cliname));
reply = dbus_message_new_method_return(message);
if (!reply) return ENOMEM;
ret = dbus_message_append_args(reply,
DBUS_TYPE_UINT16, &clitype,
DBUS_TYPE_UINT16, &version,
DBUS_TYPE_STRING, &cliname,
DBUS_TYPE_STRING, &nullname,
DBUS_TYPE_INVALID);
if (!ret) {
dbus_message_unref(reply);
return EIO;
}
/* send reply back */
sbus_conn_send_reply(conn, reply);
dbus_message_unref(reply);
return EOK;
}
static struct sbus_method pam_dp_methods[] = {
{ DP_CLI_METHOD_IDENTITY, pam_dp_identity },
{ NULL, NULL }
};
struct sbus_interface pam_dp_interface = {
DATA_PROVIDER_INTERFACE,
DATA_PROVIDER_PATH,
SBUS_DEFAULT_VTABLE,
pam_dp_methods,
NULL
};
struct sbus_interface *get_pam_dp_interface(void)
{
return &pam_dp_interface;
}
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