summaryrefslogtreecommitdiff
path: root/src/providers/dp_auth_util.c
blob: 0bf10a7d2fdea38e5b38d2da7f249788fbc7f71c (plain)
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
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
/*
   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)
{
    dbus_bool_t db_ret;
    const char *service;
    const char *tty;
    const char *ruser;
    const char *rhost;
    uint32_t authtok_type;
    uint32_t authtok_length;
    uint8_t *authtok_data;
    uint32_t new_authtok_type;
    uint32_t new_authtok_length;
    uint8_t *new_authtok_data;

    if (pd->user == NULL) return false;
    service = pd->service ? pd->service : "";
    tty = pd->tty ? pd->tty : "";
    ruser = pd->ruser ? pd->ruser : "";
    rhost = pd->rhost ? pd->rhost : "";
    authtok_type = (uint32_t)sss_authtok_get_type(pd->authtok);
    authtok_data = sss_authtok_get_data(pd->authtok);
    authtok_length = sss_authtok_get_size(pd->authtok);
    new_authtok_type = (uint32_t)sss_authtok_get_type(pd->newauthtok);
    new_authtok_data = sss_authtok_get_data(pd->newauthtok);
    new_authtok_length = sss_authtok_get_size(pd->newauthtok);

    db_ret = dbus_message_append_args(msg,
                                      DBUS_TYPE_INT32,  &(pd->cmd),
                                      DBUS_TYPE_STRING, &(pd->user),
                                      DBUS_TYPE_STRING, &(pd->domain),
                                      DBUS_TYPE_STRING, &service,
                                      DBUS_TYPE_STRING, &tty,
                                      DBUS_TYPE_STRING, &ruser,
                                      DBUS_TYPE_STRING, &rhost,
                                      DBUS_TYPE_UINT32, &authtok_type,
                                      DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
                                      &authtok_data, authtok_length,
                                      DBUS_TYPE_UINT32, &new_authtok_type,
                                      DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
                                      &new_authtok_data, new_authtok_length,
                                      DBUS_TYPE_INT32, &(pd->priv),
                                      DBUS_TYPE_UINT32, &(pd->cli_pid),
                                      DBUS_TYPE_INVALID);

    return db_ret;
}

bool dp_unpack_pam_request(DBusMessage *msg, TALLOC_CTX *mem_ctx,
                           struct pam_data **new_pd, DBusError *dbus_error)
{
    dbus_bool_t db_ret;
    int ret;
    struct pam_data pd;
    uint32_t authtok_type;
    uint32_t authtok_length;
    uint8_t *authtok_data;
    uint32_t new_authtok_type;
    uint32_t new_authtok_length;
    uint8_t *new_authtok_data;

    memset(&pd, 0, sizeof(pd));

    db_ret = dbus_message_get_args(msg, dbus_error,
                                   DBUS_TYPE_INT32,  &(pd.cmd),
                                   DBUS_TYPE_STRING, &(pd.user),
                                   DBUS_TYPE_STRING, &(pd.domain),
                                   DBUS_TYPE_STRING, &(pd.service),
                                   DBUS_TYPE_STRING, &(pd.tty),
                                   DBUS_TYPE_STRING, &(pd.ruser),
                                   DBUS_TYPE_STRING, &(pd.rhost),
                                   DBUS_TYPE_UINT32, &authtok_type,
                                   DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
                                   &authtok_data, &authtok_length,
                                   DBUS_TYPE_UINT32, &new_authtok_type,
                                   DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
                                   &new_authtok_data, &new_authtok_length,
                                   DBUS_TYPE_INT32, &(pd.priv),
                                   DBUS_TYPE_UINT32, &(pd.cli_pid),
                                   DBUS_TYPE_INVALID);

    if (!db_ret) {
        DEBUG(1, ("dbus_message_get_args failed.\n"));
        return false;
    }

    ret = copy_pam_data(mem_ctx, &pd, new_pd);
    if (ret != EOK) {
        DEBUG(1, ("copy_pam_data failed.\n"));
        return false;
    }

    ret = sss_authtok_set((*new_pd)->authtok, authtok_type,
                          authtok_data, authtok_length);
    if (ret) {
        DEBUG(1, ("Failed to set auth token: %d [%s]\n", ret, strerror(ret)));
        return false;
    }
    ret = sss_authtok_set((*new_pd)->newauthtok, new_authtok_type,
                          new_authtok_data, new_authtok_length);
    if (ret) {
        DEBUG(1, ("Failed to set auth token: %d [%s]\n", ret, strerror(ret)));
        return false;
    }

    return true;
}

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);

        if (pam_add_response(pd, type, len, data) != EOK) {
            DEBUG(1, ("pam_add_response failed.\n"));
            return false;
        }
        dbus_message_iter_next(&array_iter);
    }

    return true;
}

void dp_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, dp_id_callback, NULL, NULL);

    dbus_message_unref(msg);
    return retval;
}