1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/*
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"
struct pam_reply_ctx {
struct cli_ctx *cctx;
struct pam_data *pd;
pam_dp_callback_t callback;
};
static void pam_process_dp_reply(DBusPendingCall *pending, void *ptr)
{
DBusError dbus_error;
DBusMessage* msg;
int ret;
int type;
struct pam_reply_ctx *rctx;
rctx = talloc_get_type(ptr, struct pam_reply_ctx);
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"));
rctx->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, rctx->pd, &dbus_error);
if (!ret) {
DEBUG(0, ("Failed to parse reply.\n"));
rctx->pd->pam_status = PAM_SYSTEM_ERR;
goto done;
}
DEBUG(4, ("received: [%d][%s]\n", rctx->pd->pam_status, rctx->pd->domain));
break;
case DBUS_MESSAGE_TYPE_ERROR:
DEBUG(0, ("Reply error.\n"));
rctx->pd->pam_status = PAM_SYSTEM_ERR;
break;
default:
DEBUG(0, ("Default... what now?.\n"));
rctx->pd->pam_status = PAM_SYSTEM_ERR;
}
done:
dbus_pending_call_unref(pending);
dbus_message_unref(msg);
rctx->callback(rctx->pd);
talloc_free(rctx);
}
int pam_dp_send_req(struct cli_ctx *cctx,
pam_dp_callback_t callback,
int timeout, struct pam_data *pd)
{
DBusMessage *msg;
DBusPendingCall *pending_reply;
DBusConnection *conn;
DBusError dbus_error;
dbus_bool_t ret;
struct pam_reply_ctx *rctx;
rctx = talloc(cctx, struct pam_reply_ctx);
if (rctx == NULL) {
DEBUG(0,("Out of memory?!\n"));
return ENOMEM;
}
rctx->cctx = cctx;
rctx->callback = callback;
rctx->pd = pd;
if (pd->domain==NULL ||
pd->user==NULL ||
pd->service==NULL ||
pd->tty==NULL ||
pd->ruser==NULL ||
pd->rhost==NULL ) {
return EINVAL;
}
conn = sbus_get_connection(cctx->rctx->dp_ctx->scon_ctx);
dbus_error_init(&dbus_error);
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(conn, msg, &pending_reply, timeout);
if (!ret) {
/*
* 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_process_dp_reply, rctx,
NULL);
dbus_message_unref(msg);
return EOK;
}
static int pam_dp_identity(DBusMessage *message, struct sbus_conn_ctx *sconn)
{
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(sconn, reply);
dbus_message_unref(reply);
return EOK;
}
struct sbus_method *register_pam_dp_methods(void)
{
static struct sbus_method pam_dp_methods[] = {
{ DP_CLI_METHOD_IDENTITY, pam_dp_identity },
{ NULL, NULL }
};
return pam_dp_methods;
}
|
