dp_auth_util.c revision 1b18a3fc310932e5afcdaa4bb401c8d368e79c0b
/*
SSSD
Data Provider, auth utils
Copyright (C) Sumit Bose <sbose@redhat.com> 2009
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 "data_provider.h"
bool dp_pack_pam_request(DBusMessage *msg, struct pam_data *pd)
{
int ret;
if (pd->user == NULL) return false;
if (pd->service == NULL) pd->service = talloc_strdup(pd, "");
if (pd->tty == NULL) pd->tty = talloc_strdup(pd, "");
if (pd->ruser == NULL) pd->ruser = talloc_strdup(pd, "");
if (pd->rhost == NULL) pd->rhost = talloc_strdup(pd, "");
ret = dbus_message_append_args(msg,
DBUS_TYPE_INT32, &(pd->cmd),
DBUS_TYPE_STRING, &(pd->user),
DBUS_TYPE_STRING, &(pd->service),
DBUS_TYPE_STRING, &(pd->tty),
DBUS_TYPE_STRING, &(pd->ruser),
DBUS_TYPE_STRING, &(pd->rhost),
DBUS_TYPE_UINT32, &(pd->authtok_type),
DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
&(pd->authtok),
(pd->authtok_size),
DBUS_TYPE_UINT32, &(pd->newauthtok_type),
DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
&(pd->newauthtok),
pd->newauthtok_size,
DBUS_TYPE_INT32, &(pd->priv),
DBUS_TYPE_UINT32, &(pd->cli_pid),
DBUS_TYPE_INVALID);
return ret;
}
bool dp_unpack_pam_request(DBusMessage *msg, struct pam_data *pd, DBusError *dbus_error)
{
int ret;
ret = dbus_message_get_args(msg, dbus_error,
DBUS_TYPE_INT32, &(pd->cmd),
DBUS_TYPE_STRING, &(pd->user),
DBUS_TYPE_STRING, &(pd->service),
DBUS_TYPE_STRING, &(pd->tty),
DBUS_TYPE_STRING, &(pd->ruser),
DBUS_TYPE_STRING, &(pd->rhost),
DBUS_TYPE_UINT32, &(pd->authtok_type),
DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
&(pd->authtok),
&(pd->authtok_size),
DBUS_TYPE_UINT32, &(pd->newauthtok_type),
DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
&(pd->newauthtok),
&(pd->newauthtok_size),
DBUS_TYPE_INT32, &(pd->priv),
DBUS_TYPE_UINT32, &(pd->cli_pid),
DBUS_TYPE_INVALID);
return ret;
}
bool dp_pack_pam_response(DBusMessage *msg, struct pam_data *pd)
{
dbus_bool_t dbret;
struct response_data *resp;
DBusMessageIter iter;
DBusMessageIter array_iter;
DBusMessageIter struct_iter;
DBusMessageIter data_iter;
dbus_message_iter_init_append(msg, &iter);
/* Append the PAM status */
dbret = dbus_message_iter_append_basic(&iter,
DBUS_TYPE_UINT32, &(pd->pam_status));
if (!dbret) {
return false;
}
/* Create an array of response structures */
dbret = dbus_message_iter_open_container(&iter,
DBUS_TYPE_ARRAY, "(uay)",
&array_iter);
if (!dbret) {
return false;
}
resp = pd->resp_list;
while (resp != NULL) {
/* Create a DBUS struct */
dbret = dbus_message_iter_open_container(&array_iter,
DBUS_TYPE_STRUCT, NULL,
&struct_iter);
if (!dbret) {
return false;
}
/* Add the response type */
dbret = dbus_message_iter_append_basic(&struct_iter,
DBUS_TYPE_UINT32,
&(resp->type));
if (!dbret) {
return false;
}
/* Add the response message */
dbret = dbus_message_iter_open_container(&struct_iter,
DBUS_TYPE_ARRAY, "y",
&data_iter);
if (!dbret) {
return false;
}
dbret = dbus_message_iter_append_fixed_array(&data_iter,
DBUS_TYPE_BYTE, &(resp->data), resp->len);
if (!dbret) {
return false;
}
dbret = dbus_message_iter_close_container(&struct_iter, &data_iter);
if (!dbret) {
return false;
}
resp = resp->next;
dbret = dbus_message_iter_close_container(&array_iter, &struct_iter);
if (!dbret) {
return false;
}
}
/* Close the struct array */
dbret = dbus_message_iter_close_container(&iter, &array_iter);
if (!dbret) {
return false;
}
return true;
}
bool dp_unpack_pam_response(DBusMessage *msg, struct pam_data *pd, DBusError *dbus_error)
{
DBusMessageIter iter;
DBusMessageIter array_iter;
DBusMessageIter struct_iter;
DBusMessageIter sub_iter;
int type;
int len;
const uint8_t *data;
if (!dbus_message_iter_init(msg, &iter)) {
DEBUG(1, ("pam response has no arguments.\n"));
return false;
}
if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32) {
DEBUG(1, ("pam response format error.\n"));
return false;
}
dbus_message_iter_get_basic(&iter, &(pd->pam_status));
if (!dbus_message_iter_next(&iter)) {
DEBUG(1, ("pam response has too few arguments.\n"));
return false;
}
/* After this point will be an array of pam data */
if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY) {
DEBUG(1, ("pam response format error.\n"));
DEBUG(1, ("Type was %c\n", (char)dbus_message_iter_get_arg_type(&iter)));
return false;
}
if (dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT) {
DEBUG(1, ("pam response format error.\n"));
return false;
}
dbus_message_iter_recurse(&iter, &array_iter);
while (dbus_message_iter_get_arg_type(&array_iter) != DBUS_TYPE_INVALID) {
/* Read in a pam data struct */
if (dbus_message_iter_get_arg_type(&array_iter) != DBUS_TYPE_STRUCT) {
DEBUG(1, ("pam response format error.\n"));
return false;
}
dbus_message_iter_recurse(&array_iter, &struct_iter);
/* PAM data struct contains a type and a byte-array of data */
/* Get the pam data type */
if (dbus_message_iter_get_arg_type(&struct_iter) != DBUS_TYPE_UINT32) {
DEBUG(1, ("pam response format error.\n"));
return false;
}
dbus_message_iter_get_basic(&struct_iter, &type);
if (!dbus_message_iter_next(&struct_iter)) {
DEBUG(1, ("pam response format error.\n"));
return false;
}
/* Get the byte array */
if (dbus_message_iter_get_arg_type(&struct_iter) != DBUS_TYPE_ARRAY ||
dbus_message_iter_get_element_type(&struct_iter) != DBUS_TYPE_BYTE) {
DEBUG(1, ("pam response format error.\n"));
return false;
}
dbus_message_iter_recurse(&struct_iter, &sub_iter);
dbus_message_iter_get_fixed_array(&sub_iter, &data, &len);
pam_add_response(pd, type, len, data);
dbus_message_iter_next(&array_iter);
}
return true;
}
static void id_callback(DBusPendingCall *pending, void *ptr)
{
DBusMessage *reply;
DBusError dbus_error;
dbus_bool_t ret;
dbus_uint16_t dp_ver;
int type;
dbus_error_init(&dbus_error);
reply = dbus_pending_call_steal_reply(pending);
if (!reply) {
/* reply should never be null. This function shouldn't be called
* until reply is valid or timeout has occurred. If reply is NULL
* here, something is seriously wrong and we should bail out.
*/
DEBUG(0, ("Severe error. A reply callback was called but no"
" reply was received and no timeout occurred\n"));
/* FIXME: Destroy this connection ? */
goto done;
}
type = dbus_message_get_type(reply);
switch (type) {
case DBUS_MESSAGE_TYPE_METHOD_RETURN:
ret = dbus_message_get_args(reply, &dbus_error,
DBUS_TYPE_UINT16, &dp_ver,
DBUS_TYPE_INVALID);
if (!ret) {
DEBUG(1, ("Failed to parse message\n"));
if (dbus_error_is_set(&dbus_error)) dbus_error_free(&dbus_error);
/* FIXME: Destroy this connection ? */
goto done;
}
DEBUG(4, ("Got id ack and version (%d) from DP\n", dp_ver));
break;
case DBUS_MESSAGE_TYPE_ERROR:
DEBUG(0,("The Monitor returned an error [%s]\n",
dbus_message_get_error_name(reply)));
/* Falling through to default intentionally*/
default:
/*
* Timeout or other error occurred or something
* unexpected happened.
* It doesn't matter which, because either way we
* know that this connection isn't trustworthy.
* We'll destroy it now.
*/
/* FIXME: Destroy this connection ? */
break;
}
done:
dbus_pending_call_unref(pending);
dbus_message_unref(reply);
}
int dp_common_send_id(struct sbus_connection *conn, uint16_t version,
const char *name)
{
DBusMessage *msg;
dbus_bool_t ret;
int retval;
/* create the message */
msg = dbus_message_new_method_call(NULL,
DP_PATH,
DP_INTERFACE,
DP_METHOD_REGISTER);
if (msg == NULL) {
DEBUG(0, ("Out of memory?!\n"));
return ENOMEM;
}
DEBUG(4, ("Sending ID to DP: (%d,%s)\n",
version, name));
ret = dbus_message_append_args(msg,
DBUS_TYPE_UINT16, &version,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_INVALID);
if (!ret) {
DEBUG(1, ("Failed to build message\n"));
return EIO;
}
retval = sbus_conn_send(conn, msg, 30000, id_callback, NULL, NULL);
dbus_message_unref(msg);
return retval;
}