auth.c 32.2 KB
Newer Older
1
2
3
4
5
/* Icecast
 *
 * This program is distributed under the GNU General Public License, version 2.
 * A copy of this license is included with this source.
 *
6
 * Copyright 2000-2004, Jack Moffitt <jack@xiph.org,
7
8
9
10
 *                      Michael Smith <msmith@xiph.org>,
 *                      oddsock <oddsock@xiph.org>,
 *                      Karl Heyes <karl@xiph.org>
 *                      and others (see AUTHORS for details).
11
 * Copyright 2013-2018, Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>,
12
13
 */

14
/**
Michael Smith's avatar
Michael Smith committed
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
 * Client authentication functions
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <stdio.h>

#include "auth.h"
#include "source.h"
#include "client.h"
30
#include "errors.h"
Michael Smith's avatar
Michael Smith committed
31
#include "cfgfile.h"
32
#include "stats.h"
Marvin Scholz's avatar
Marvin Scholz committed
33
#include "common/httpp/httpp.h"
34
#include "fserve.h"
35
#include "admin.h"
Philipp Schafft's avatar
Philipp Schafft committed
36
#include "acl.h"
Michael Smith's avatar
Michael Smith committed
37
38
39

#include "logging.h"
#define CATMODULE "auth"
40

Philipp Schafft's avatar
Philipp Schafft committed
41
42
43
44
45
46
47
/* data structures */
struct auth_stack_tag {
    size_t refcount;
    auth_t *auth;
    mutex_t lock;
    auth_stack_t *next;
};
48

Philipp Schafft's avatar
Philipp Schafft committed
49
/* code */
Marvin Scholz's avatar
Marvin Scholz committed
50
static void __handle_auth_client(auth_t *auth, auth_client *auth_user);
51

52
53
54
55
56
57
58
59
60
61
62
63
64
static mutex_t _auth_lock; /* protects _current_id */
static volatile unsigned long _current_id = 0;

static unsigned long _next_auth_id(void) {
    unsigned long id;

    thread_mutex_lock(&_auth_lock);
    id = _current_id++;
    thread_mutex_unlock(&_auth_lock);

    return id;
}

65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
static const struct {
    auth_result result;
    const char *string;
} __auth_results[] = {
    {.result = AUTH_UNDEFINED,      .string = "undefined"},
    {.result = AUTH_OK,             .string = "ok"},
    {.result = AUTH_FAILED,         .string = "failed"},
    {.result = AUTH_RELEASED,       .string = "released"},
    {.result = AUTH_FORBIDDEN,      .string = "forbidden"},
    {.result = AUTH_NOMATCH,        .string = "no match"},
    {.result = AUTH_USERADDED,      .string = "user added"},
    {.result = AUTH_USEREXISTS,     .string = "user exists"},
    {.result = AUTH_USERDELETED,    .string = "user deleted"}
};

80
81
static const char *auth_result2str(auth_result res)
{
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
    size_t i;

    for (i = 0; i < (sizeof(__auth_results)/sizeof(*__auth_results)); i++) {
        if (__auth_results[i].result == res)
            return __auth_results[i].string;
    }

    return "(unknown)";
}

auth_result auth_str2result(const char *str)
{
    size_t i;

    for (i = 0; i < (sizeof(__auth_results)/sizeof(*__auth_results)); i++) {
        if (strcasecmp(__auth_results[i].string, str) == 0)
            return __auth_results[i].result;
99
    }
100
101

    return AUTH_FAILED;
102
103
}

Philipp Schafft's avatar
Philipp Schafft committed
104
static auth_client *auth_client_setup (client_t *client)
105
{
106
    /* This will look something like "Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==" */
107
    auth_client *auth_user;
108

Philipp Schafft's avatar
Philipp Schafft committed
109
110
111
112
113
114
115
116
117
118
119
    do {
        const char *header;
        char *userpass, *tmp;
        char *username, *password;

        /* check if we already have auth infos */
        if (client->username || client->password)
            break;

        header = httpp_getvar(client->parser, "authorization");

120
121
122
        if (header == NULL)
            break;

Philipp Schafft's avatar
Philipp Schafft committed
123
        if (strncmp(header, "Basic ", 6) == 0) {
124
            userpass = util_base64_decode (header+6);
Philipp Schafft's avatar
Philipp Schafft committed
125
            if (userpass == NULL) {
126
                ICECAST_LOG_WARN("Base64 decode of Authorization header \"%s\" failed",
127
128
129
130
131
                        header+6);
                break;
            }

            tmp = strchr(userpass, ':');
132
            if (tmp == NULL) {
Philipp Schafft's avatar
Philipp Schafft committed
133
                free(userpass);
134
                break;
135
            }
136
137
138
139

            *tmp = 0;
            username = userpass;
            password = tmp+1;
Philipp Schafft's avatar
Philipp Schafft committed
140
141
            client->username = strdup(username);
            client->password = strdup(password);
142
143
            free (userpass);
            break;
144
        }
145
        ICECAST_LOG_INFO("unhandled authorization header: %s", header);
146
    } while (0);
147

Philipp Schafft's avatar
Philipp Schafft committed
148
    auth_user = calloc(1, sizeof(auth_client));
149
150
    auth_user->client = client;
    return auth_user;
151
152
}

Michael Smith's avatar
Michael Smith committed
153

Philipp Schafft's avatar
Philipp Schafft committed
154
static void queue_auth_client (auth_client *auth_user)
155
{
156
157
    auth_t *auth;

158
    if (auth_user == NULL)
159
160
        return;
    auth_user->next = NULL;
Philipp Schafft's avatar
Philipp Schafft committed
161
    if (auth_user->client == NULL || auth_user->client->auth == NULL)
162
    {
Philipp Schafft's avatar
Philipp Schafft committed
163
164
        ICECAST_LOG_WARN("internal state is incorrect for %p", auth_user->client);
        return;
165
    }
Philipp Schafft's avatar
Philipp Schafft committed
166
167
    auth = auth_user->client->auth;
    ICECAST_LOG_DEBUG("...refcount on auth_t %s is now %d", auth->mount, (int)auth->refcount);
168
169
170
171
172
173
174
175
176
177
    if (auth->immediate) {
        __handle_auth_client(auth, auth_user);
    } else {
        thread_mutex_lock (&auth->lock);
        *auth->tailp = auth_user;
        auth->tailp = &auth_user->next;
        auth->pending_count++;
        ICECAST_LOG_INFO("auth on %s has %d pending", auth->mount, auth->pending_count);
        thread_mutex_unlock (&auth->lock);
    }
178
}
Michael Smith's avatar
Michael Smith committed
179
180


181
182
183
/* release the auth. It is referred to by multiple structures so this is
 * refcounted and only actual freed after the last use
 */
Philipp Schafft's avatar
Philipp Schafft committed
184
void auth_release (auth_t *authenticator) {
185
186
    if (authenticator == NULL)
        return;
Michael Smith's avatar
Michael Smith committed
187

Philipp Schafft's avatar
Philipp Schafft committed
188
    thread_mutex_lock(&authenticator->lock);
189
    authenticator->refcount--;
Philipp Schafft's avatar
Philipp Schafft committed
190
    ICECAST_LOG_DEBUG("...refcount on auth_t %s is now %d", authenticator->mount, (int)authenticator->refcount);
191
    if (authenticator->refcount)
192
    {
Philipp Schafft's avatar
Philipp Schafft committed
193
        thread_mutex_unlock(&authenticator->lock);
194
        return;
195
    }
Michael Smith's avatar
Michael Smith committed
196

197
    /* cleanup auth thread attached to this auth */
Philipp Schafft's avatar
Philipp Schafft committed
198
199
    if (authenticator->running) {
        authenticator->running = 0;
200
        thread_mutex_unlock(&authenticator->lock);
Philipp Schafft's avatar
Philipp Schafft committed
201
        thread_join(authenticator->thread);
202
        thread_mutex_lock(&authenticator->lock);
Philipp Schafft's avatar
Philipp Schafft committed
203
    }
204

205
    if (authenticator->free)
Philipp Schafft's avatar
Philipp Schafft committed
206
207
208
209
210
        authenticator->free(authenticator);
    if (authenticator->type)
        xmlFree (authenticator->type);
    if (authenticator->role)
        xmlFree (authenticator->role);
211
212
    if (authenticator->management_url)
        xmlFree (authenticator->management_url);
Philipp Schafft's avatar
Philipp Schafft committed
213
214
    thread_mutex_unlock(&authenticator->lock);
    thread_mutex_destroy(&authenticator->lock);
215
    if (authenticator->mount)
Philipp Schafft's avatar
Philipp Schafft committed
216
217
218
        free(authenticator->mount);
    acl_release(authenticator->acl);
    free(authenticator);
Michael Smith's avatar
Michael Smith committed
219
220
}

Philipp Schafft's avatar
Philipp Schafft committed
221
222
223
224
225
226
227
228
229
230
231
/* increment refcount on the auth.
 */
void    auth_addref (auth_t *authenticator) {
    if (authenticator == NULL)
        return;

    thread_mutex_lock (&authenticator->lock);
    authenticator->refcount++;
    ICECAST_LOG_DEBUG("...refcount on auth_t %s is now %d", authenticator->mount, (int)authenticator->refcount);
    thread_mutex_unlock (&authenticator->lock);
}
Michael Smith's avatar
Michael Smith committed
232

233
static void auth_client_free (auth_client *auth_user)
Michael Smith's avatar
Michael Smith committed
234
{
235
    if (!auth_user)
236
        return;
237
238
239

    free(auth_user->alter_client_arg);
    free(auth_user);
Michael Smith's avatar
Michael Smith committed
240
241
242
}


243
/* verify that the client is still connected. */
244
245
246
static int is_client_connected (client_t *client) {
/* As long as sock_active() is broken we need to disable this:

247
248
    int ret = 1;
    if (client)
Philipp Schafft's avatar
Philipp Schafft committed
249
        if (sock_active(client->con->sock) == 0)
250
251
            ret = 0;
    return ret;
252
253
*/
    return 1;
254
255
}

Philipp Schafft's avatar
Philipp Schafft committed
256
static auth_result auth_new_client (auth_t *auth, auth_client *auth_user) {
257
    client_t *client = auth_user->client;
Philipp Schafft's avatar
Philipp Schafft committed
258
    auth_result ret = AUTH_FAILED;
259

260
261
    /* make sure there is still a client at this point, a slow backend request
     * can be avoided if client has disconnected */
Philipp Schafft's avatar
Philipp Schafft committed
262
    if (is_client_connected(client) == 0) {
263
        ICECAST_LOG_DEBUG("client is no longer connected");
264
        client->respcode = 400;
265
266
        auth_release (client->auth);
        client->auth = NULL;
Philipp Schafft's avatar
Philipp Schafft committed
267
        return AUTH_FAILED;
268
    }
Philipp Schafft's avatar
Philipp Schafft committed
269
270
271
272

    if (auth->authenticate_client) {
        ret = auth->authenticate_client(auth_user);
        if (ret != AUTH_OK)
273
274
275
        {
            auth_release (client->auth);
            client->auth = NULL;
Philipp Schafft's avatar
Philipp Schafft committed
276
            return ret;
277
        }
Michael Smith's avatar
Michael Smith committed
278
    }
Philipp Schafft's avatar
Philipp Schafft committed
279
    return ret;
Michael Smith's avatar
Michael Smith committed
280
281
}

282

283
/* wrapper function for auth thread to drop client connections
284
 */
Philipp Schafft's avatar
Philipp Schafft committed
285
static auth_result auth_remove_client(auth_t *auth, auth_client *auth_user)
Michael Smith's avatar
Michael Smith committed
286
{
287
    client_t *client = auth_user->client;
Philipp Schafft's avatar
Philipp Schafft committed
288
    auth_result ret = AUTH_RELEASED;
289

290
291
    (void)auth;

Philipp Schafft's avatar
Philipp Schafft committed
292
293
    if (client->auth->release_client)
        ret = client->auth->release_client(auth_user);
294

Philipp Schafft's avatar
Philipp Schafft committed
295
    auth_release(client->auth);
296
    client->auth = NULL;
297

Philipp Schafft's avatar
Philipp Schafft committed
298
299
300
    /* client is going, so auth is not an issue at this point */
    acl_release(client->acl);
    client->acl = NULL;
301

Philipp Schafft's avatar
Philipp Schafft committed
302
    return ret;
303
}
Michael Smith's avatar
Michael Smith committed
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
static inline int __handle_auth_client_alter(auth_t *auth, auth_client *auth_user)
{
    client_t *client = auth_user->client;
    const char *uuid = NULL;
    const char *location = NULL;
    int http_status = 0;

    void client_send_redirect(client_t *client, const char *uuid, int status, const char *location);

    switch (auth_user->alter_client_action) {
        case AUTH_ALTER_NOOP:
            return 0;
        break;
        case AUTH_ALTER_REWRITE:
            free(client->uri);
            client->uri = auth_user->alter_client_arg;
            auth_user->alter_client_arg = NULL;
            return 0;
        break;
        case AUTH_ALTER_REDIRECT:
        /* fall through */
        case AUTH_ALTER_REDIRECT_SEE_OTHER:
            uuid = "be7fac90-54fb-4673-9e0d-d15d6a4963a2";
            http_status = 303;
            location = auth_user->alter_client_arg;
        break;
        case AUTH_ALTER_REDIRECT_TEMPORARY:
            uuid = "4b08a03a-ecce-4981-badf-26b0bb6c9d9c";
            http_status = 307;
            location = auth_user->alter_client_arg;
        break;
        case AUTH_ALTER_REDIRECT_PERMANENT:
            uuid = "36bf6815-95cb-4cc8-a7b0-6b4b0c82ac5d";
            http_status = 308;
            location = auth_user->alter_client_arg;
        break;
        case AUTH_ALTER_SEND_ERROR:
            client_send_error_by_uuid(client, auth_user->alter_client_arg);
            return 1;
        break;
    }

    if (uuid && location && http_status) {
        client_send_redirect(client, uuid, http_status, location);
        return 1;
    }

    return -1;
}
354
355
356
357
358
359
360
361
362
363
static void __handle_auth_client (auth_t *auth, auth_client *auth_user) {
    auth_result result;

    if (auth_user->process) {
        result = auth_user->process(auth, auth_user);
    } else {
        ICECAST_LOG_ERROR("client auth process not set");
        result = AUTH_FAILED;
    }

364
365
    ICECAST_LOG_DEBUG("client %p on auth %p role %s processed: %s", auth_user->client, auth, auth->role, auth_result2str(result));

366
367
368
369
    if (result == AUTH_OK) {
        if (auth_user->client->acl)
            acl_release(auth_user->client->acl);
        acl_addref(auth_user->client->acl = auth->acl);
370
        if (auth->role && !auth_user->client->role) /* TODO: Handle errors here */
371
372
373
            auth_user->client->role = strdup(auth->role);
    }

374
375
376
377
378
    if (result != AUTH_NOMATCH) {
        if (__handle_auth_client_alter(auth, auth_user) == 1)
            return;
    }

379
380
381
382
383
384
385
386
    if (result == AUTH_NOMATCH && auth_user->on_no_match) {
        auth_user->on_no_match(auth_user->client, auth_user->on_result, auth_user->userdata);
    } else if (auth_user->on_result) {
        auth_user->on_result(auth_user->client, auth_user->userdata, result);
    }

    auth_client_free (auth_user);
}
Michael Smith's avatar
Michael Smith committed
387

388
389
390
/* The auth thread main loop. */
static void *auth_run_thread (void *arg)
{
391
392
    auth_t *auth = arg;

393
    ICECAST_LOG_INFO("Authentication thread started");
394
395
396
397
398
399
400
401
402
    while (1) {
        thread_mutex_lock(&auth->lock);

        if (!auth->running) {
            thread_mutex_unlock(&auth->lock);
            break;
        }

        if (auth->head) {
403
            auth_client *auth_user;
Michael Smith's avatar
Michael Smith committed
404

405
406
407
408
409
410
411
            /* may become NULL before lock taken */
            auth_user = (auth_client*)auth->head;
            if (auth_user == NULL)
            {
                thread_mutex_unlock (&auth->lock);
                continue;
            }
412
            ICECAST_LOG_DEBUG("%d client(s) pending on %s (role %s)", auth->pending_count, auth->mount, auth->role);
413
414
415
416
            auth->head = auth_user->next;
            if (auth->head == NULL)
                auth->tailp = &auth->head;
            auth->pending_count--;
417
            thread_mutex_unlock(&auth->lock);
418
            auth_user->next = NULL;
Michael Smith's avatar
Michael Smith committed
419

420
            __handle_auth_client(auth, auth_user);
Philipp Schafft's avatar
Philipp Schafft committed
421

422
            continue;
423
424
        } else {
            thread_mutex_unlock(&auth->lock);
425
        }
Philipp Schafft's avatar
Philipp Schafft committed
426
        thread_sleep (150000);
Michael Smith's avatar
Michael Smith committed
427
    }
428
    ICECAST_LOG_INFO("Authentication thread shutting down");
Philipp Schafft's avatar
Philipp Schafft committed
429
    return NULL;
430
}
Michael Smith's avatar
Michael Smith committed
431
432


Philipp Schafft's avatar
Philipp Schafft committed
433
/* Add a client.
434
 */
Philipp Schafft's avatar
Philipp Schafft committed
435
436
static void auth_add_client(auth_t *auth, client_t *client, void (*on_no_match)(client_t *client, void (*on_result)(client_t *client, void *userdata, auth_result result), void *userdata), void (*on_result)(client_t *client, void *userdata, auth_result result), void *userdata) {
    auth_client *auth_user;
437
    auth_matchtype_t matchtype;
438

439
440
    ICECAST_LOG_DEBUG("Trying to add client %p to auth %p's (role %s) queue.", client, auth, auth->role);

Philipp Schafft's avatar
Philipp Schafft committed
441
442
    /* TODO: replace that magic number */
    if (auth->pending_count > 100) {
443
        ICECAST_LOG_WARN("too many clients awaiting authentication on auth %p", auth);
444
        client_send_error_by_id(client, ICECAST_ERROR_AUTH_BUSY);
Philipp Schafft's avatar
Philipp Schafft committed
445
        return;
446
447
    }

448
    if (auth->filter_method[client->parser->req_type] == AUTH_MATCHTYPE_NOMATCH) {
Philipp Schafft's avatar
Philipp Schafft committed
449
450
451
452
        if (on_no_match) {
           on_no_match(client, on_result, userdata);
        } else if (on_result) {
           on_result(client, userdata, AUTH_NOMATCH);
453
        }
454
455
456
        return;
    }

457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
    if (client->admin_command == ADMIN_COMMAND_ERROR) {
        /* this is a web/ client */
        matchtype = auth->filter_web_policy;
    } else {
        /* this is a admin/ client */
        size_t i;

        matchtype = AUTH_MATCHTYPE_UNUSED;

        for (i = 0; i < (sizeof(auth->filter_admin)/sizeof(*(auth->filter_admin))); i++) {
            if (auth->filter_admin[i].type != AUTH_MATCHTYPE_UNUSED && auth->filter_admin[i].command == client->admin_command) {
                matchtype = auth->filter_admin[i].type;
                break;
            }
        }

        if (matchtype == AUTH_MATCHTYPE_UNUSED)
            matchtype = auth->filter_admin_policy;
    }
    if (matchtype == AUTH_MATCHTYPE_NOMATCH) {
        if (on_no_match) {
           on_no_match(client, on_result, userdata);
        } else if (on_result) {
           on_result(client, userdata, AUTH_NOMATCH);
        }
        return;
    }

Philipp Schafft's avatar
Philipp Schafft committed
485
486
487
488
489
490
491
    auth_release(client->auth);
    auth_addref(client->auth = auth);
    auth_user = auth_client_setup(client);
    auth_user->process = auth_new_client;
    auth_user->on_no_match = on_no_match;
    auth_user->on_result = on_result;
    auth_user->userdata = userdata;
492
    ICECAST_LOG_DEBUG("adding client %p for authentication on %p", client, auth);
Philipp Schafft's avatar
Philipp Schafft committed
493
    queue_auth_client(auth_user);
494
495
}

496
497
498
499
500
501
502
static void __auth_on_result_destroy_client(client_t *client, void *userdata, auth_result result)
{
    (void)userdata, (void)result;

    client_destroy(client);
}

503
504
505
/* determine whether we need to process this client further. This
 * involves any auth exit, typically for external auth servers.
 */
Philipp Schafft's avatar
Philipp Schafft committed
506
507
508
int auth_release_client (client_t *client) {
    if (!client->acl)
        return 0;
509

Philipp Schafft's avatar
Philipp Schafft committed
510
511
512
    if (client->auth && client->auth->release_client) {
        auth_client *auth_user = auth_client_setup(client);
        auth_user->process = auth_remove_client;
513
        auth_user->on_result = __auth_on_result_destroy_client;
Philipp Schafft's avatar
Philipp Schafft committed
514
515
516
517
518
        queue_auth_client(auth_user);
        return 1;
    } else if (client->auth) {
        auth_release(client->auth);
        client->auth = NULL;
519
    }
Philipp Schafft's avatar
Philipp Schafft committed
520
521
522

    acl_release(client->acl);
    client->acl = NULL;
523
524
    return 0;
}
525
526


Karl Heyes's avatar
Karl Heyes committed
527
static int get_authenticator (auth_t *auth, config_options_t *options)
528
{
529
530
    if (auth->type == NULL)
    {
531
        ICECAST_LOG_WARN("no authentication type defined");
532
533
        return -1;
    }
534
535
    do
    {
536
        ICECAST_LOG_DEBUG("type is %s", auth->type);
537

Philipp Schafft's avatar
Philipp Schafft committed
538
        if (strcmp(auth->type, AUTH_TYPE_URL) == 0) {
539
#ifdef HAVE_CURL
Philipp Schafft's avatar
Philipp Schafft committed
540
            if (auth_get_url_auth(auth, options) < 0)
Karl Heyes's avatar
Karl Heyes committed
541
                return -1;
542
            break;
543
#else
544
            ICECAST_LOG_ERROR("Auth URL disabled");
Karl Heyes's avatar
Karl Heyes committed
545
            return -1;
546
#endif
Philipp Schafft's avatar
Philipp Schafft committed
547
548
549
550
551
552
553
554
555
556
557
558
559
560
        } else if (strcmp(auth->type, AUTH_TYPE_HTPASSWD) == 0) {
            if (auth_get_htpasswd_auth(auth, options) < 0)
                return -1;
            break;
        } else if (strcmp(auth->type, AUTH_TYPE_ANONYMOUS) == 0) {
            if (auth_get_anonymous_auth(auth, options) < 0)
                return -1;
            break;
        } else if (strcmp(auth->type, AUTH_TYPE_STATIC) == 0) {
            if (auth_get_static_auth(auth, options) < 0)
                return -1;
            break;
        } else if (strcmp(auth->type, AUTH_TYPE_LEGACY_PASSWORD) == 0) {
            if (auth_get_static_auth(auth, options) < 0)
Karl Heyes's avatar
Karl Heyes committed
561
                return -1;
562
            break;
563
        }
Karl Heyes's avatar
Karl Heyes committed
564

565
        ICECAST_LOG_ERROR("Unrecognised authenticator type: \"%s\"", auth->type);
Karl Heyes's avatar
Karl Heyes committed
566
        return -1;
567
568
    } while (0);

Karl Heyes's avatar
Karl Heyes committed
569
    return 0;
570
}
571
572


573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
static inline void auth_get_authenticator__filter_admin(auth_t *auth, xmlNodePtr node, size_t *filter_admin_index, const char *name, auth_matchtype_t matchtype)
{
    char * tmp = (char*)xmlGetProp(node, XMLSTR(name));

    if (tmp) {
        char *cur = tmp;
        char *next;

        while (cur) {
            next = strstr(cur, ",");
            if (next) {
                *next = 0;
                next++;
                for (; *next == ' '; next++);
            }

            if (*filter_admin_index < (sizeof(auth->filter_admin)/sizeof(*(auth->filter_admin)))) {
                auth->filter_admin[*filter_admin_index].command = admin_get_command(cur);
                switch (auth->filter_admin[*filter_admin_index].command) {
                    case ADMIN_COMMAND_ERROR:
                        ICECAST_LOG_ERROR("Can not add unknown %s command to role.", name);
                    break;
                    case ADMIN_COMMAND_ANY:
                        auth->filter_admin_policy = matchtype;
                    break;
                    default:
                        auth->filter_admin[*filter_admin_index].type = matchtype;
                        (*filter_admin_index)++;
                    break;
                }
            } else {
                ICECAST_LOG_ERROR("Can not add more %s commands to role.", name);
            }

            cur = next;
        }

        free(tmp);
    }
}

614
615
616
617
618
619
620
621
622
623
624
625
626
627
static inline void auth_get_authenticator__init_method(auth_t *auth, int *method_inited, auth_matchtype_t init_with)
{
    size_t i;

    if (*method_inited)
        return;

    for (i = 0; i < (sizeof(auth->filter_method)/sizeof(*auth->filter_method)); i++)
        auth->filter_method[i] = init_with;

    *method_inited = 1;
}

static inline int auth_get_authenticator__filter_method(auth_t *auth, xmlNodePtr node, const char *name, auth_matchtype_t matchtype, int *method_inited, auth_matchtype_t init_with)
628
629
630
631
632
633
{
    char * tmp = (char*)xmlGetProp(node, XMLSTR(name));

    if (tmp) {
        char *cur = tmp;

634
635
        auth_get_authenticator__init_method(auth, method_inited, init_with);

636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
        while (cur) {
            char *next = strstr(cur, ",");
            httpp_request_type_e idx;

            if (next) {
                *next = 0;
                next++;
                for (; *next == ' '; next++);
            }

            if (strcmp(cur, "*") == 0) {
                size_t i;

                for (i = 0; i < (sizeof(auth->filter_method)/sizeof(*(auth->filter_method))); i++)
                    auth->filter_method[i] = matchtype;
                break;
            }

            idx = httpp_str_to_method(cur);
            if (idx == httpp_req_unknown) {
                ICECAST_LOG_ERROR("Can not add known method \"%H\" to role's %s", cur, name);
                return -1;
            }
            auth->filter_method[idx] = matchtype;
            cur = next;
        }

        free(tmp);
    }

    return 0;
}

669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
static inline int auth_get_authenticator__permission_alter(auth_t *auth, xmlNodePtr node, const char *name, auth_matchtype_t matchtype)
{
    char * tmp = (char*)xmlGetProp(node, XMLSTR(name));

    if (tmp) {
        char *cur = tmp;

        while (cur) {
            char *next = strstr(cur, ",");
            auth_alter_t idx;

            if (next) {
                *next = 0;
                next++;
                for (; *next == ' '; next++);
            }

            if (strcmp(cur, "*") == 0) {
                size_t i;

                for (i = 0; i < (sizeof(auth->permission_alter)/sizeof(*(auth->permission_alter))); i++)
                    auth->permission_alter[i] = matchtype;
                break;
            }

            idx = auth_str2alter(cur);
            if (idx == AUTH_ALTER_NOOP) {
                ICECAST_LOG_ERROR("Can not add unknown alter action \"%H\" to role's %s", cur, name);
                return -1;
            } else if (idx == AUTH_ALTER_REDIRECT) {
                auth->permission_alter[AUTH_ALTER_REDIRECT] = matchtype;
                auth->permission_alter[AUTH_ALTER_REDIRECT_SEE_OTHER] = matchtype;
                auth->permission_alter[AUTH_ALTER_REDIRECT_TEMPORARY] = matchtype;
                auth->permission_alter[AUTH_ALTER_REDIRECT_PERMANENT] = matchtype;
            } else {
                auth->permission_alter[idx] = matchtype;
            }

            cur = next;
        }

        free(tmp);
    }

    return 0;
}
715
auth_t *auth_get_authenticator(xmlNodePtr node)
716
{
717
    auth_t *auth = calloc(1, sizeof(auth_t));
718
    config_options_t *options = NULL, **next_option = &options;
719
    xmlNodePtr child;
Philipp Schafft's avatar
Philipp Schafft committed
720
    char *method;
721
    char *tmp;
Philipp Schafft's avatar
Philipp Schafft committed
722
    size_t i;
723
    size_t filter_admin_index = 0;
724
    int method_inited = 0;
725
726
727
728

    if (auth == NULL)
        return NULL;

Philipp Schafft's avatar
Philipp Schafft committed
729
730
    thread_mutex_create(&auth->lock);
    auth->refcount = 1;
731
    auth->id = _next_auth_id();
Philipp Schafft's avatar
Philipp Schafft committed
732
733
    auth->type = (char*)xmlGetProp(node, XMLSTR("type"));
    auth->role = (char*)xmlGetProp(node, XMLSTR("name"));
734
    auth->management_url = (char*)xmlGetProp(node, XMLSTR("management-url"));
735
736
737
738
739
740
741
    auth->filter_web_policy = AUTH_MATCHTYPE_MATCH;
    auth->filter_admin_policy = AUTH_MATCHTYPE_MATCH;

    for (i = 0; i < (sizeof(auth->filter_admin)/sizeof(*(auth->filter_admin))); i++) {
        auth->filter_admin[i].type = AUTH_MATCHTYPE_UNUSED;
        auth->filter_admin[i].command = ADMIN_COMMAND_ERROR;
    }
Philipp Schafft's avatar
Philipp Schafft committed
742

743
744
745
    for (i = 0; i < (sizeof(auth->permission_alter)/sizeof(*(auth->permission_alter))); i++)
        auth->permission_alter[i] = AUTH_MATCHTYPE_NOMATCH;

Philipp Schafft's avatar
Philipp Schafft committed
746
747
748
749
750
751
752
753
754
755
    if (!auth->type) {
        auth_release(auth);
        return NULL;
    }

    method = (char*)xmlGetProp(node, XMLSTR("method"));
    if (method) {
        char *cur = method;
        char *next;

756
757
        for (i = 0; i < (sizeof(auth->filter_method)/sizeof(*auth->filter_method)); i++)
            auth->filter_method[i] = AUTH_MATCHTYPE_NOMATCH;
758
	method_inited = 1;
Philipp Schafft's avatar
Philipp Schafft committed
759
760
761
762
763
764
765
766
767
768
769
770

        while (cur) {
            httpp_request_type_e idx;

            next = strstr(cur, ",");
            if (next) {
                *next = 0;
                next++;
                for (; *next == ' '; next++);
            }

            if (strcmp(cur, "*") == 0) {
771
772
                for (i = 0; i < (sizeof(auth->filter_method)/sizeof(*auth->filter_method)); i++)
                    auth->filter_method[i] = AUTH_MATCHTYPE_MATCH;
Philipp Schafft's avatar
Philipp Schafft committed
773
774
775
776
777
778
779
780
                break;
            }

            idx = httpp_str_to_method(cur);
            if (idx == httpp_req_unknown) {
                auth_release(auth);
                return NULL;
            }
781
            auth->filter_method[idx] = AUTH_MATCHTYPE_MATCH;
Philipp Schafft's avatar
Philipp Schafft committed
782
783
784
785
786
787
788

            cur = next;
        }

        xmlFree(method);
    }

789
790
791
792
    auth_get_authenticator__filter_method(auth, node, "match-method", AUTH_MATCHTYPE_MATCH, &method_inited, AUTH_MATCHTYPE_NOMATCH);
    auth_get_authenticator__filter_method(auth, node, "nomatch-method", AUTH_MATCHTYPE_NOMATCH, &method_inited, AUTH_MATCHTYPE_MATCH);

    auth_get_authenticator__init_method(auth, &method_inited, AUTH_MATCHTYPE_MATCH);
793

794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
    tmp = (char*)xmlGetProp(node, XMLSTR("match-web"));
    if (tmp) {
        if (strcmp(tmp, "*") == 0) {
            auth->filter_web_policy = AUTH_MATCHTYPE_MATCH;
        } else {
            auth->filter_web_policy = AUTH_MATCHTYPE_NOMATCH;
        }
        free(tmp);
    }

    tmp = (char*)xmlGetProp(node, XMLSTR("nomatch-web"));
    if (tmp) {
        if (strcmp(tmp, "*") == 0) {
            auth->filter_web_policy = AUTH_MATCHTYPE_NOMATCH;
        } else {
            auth->filter_web_policy = AUTH_MATCHTYPE_MATCH;
        }
        free(tmp);
    }

    auth_get_authenticator__filter_admin(auth, node, &filter_admin_index, "match-admin", AUTH_MATCHTYPE_MATCH);
    auth_get_authenticator__filter_admin(auth, node, &filter_admin_index, "nomatch-admin", AUTH_MATCHTYPE_NOMATCH);

817
818
819
    auth_get_authenticator__permission_alter(auth, node, "may-alter", AUTH_MATCHTYPE_MATCH);
    auth_get_authenticator__permission_alter(auth, node, "may-not-alter", AUTH_MATCHTYPE_NOMATCH);

820
821
822
823
824
825
826
827
828
829
    /* sub node parsing */
    child = node->xmlChildrenNode;
    do {
        if (child == NULL)
            break;

        if (xmlIsBlankNode(child))
            continue;

        if (xmlStrcmp (child->name, XMLSTR("option")) == 0) {
Philipp Schafft's avatar
Philipp Schafft committed
830
            config_options_t *opt = calloc(1, sizeof (config_options_t));
831
832
            opt->name = (char *)xmlGetProp(child, XMLSTR("name"));
            if (opt->name == NULL) {
833
834
835
                free(opt);
                continue;
            }
836
837
            opt->value = (char *)xmlGetProp(child, XMLSTR("value"));
            if (opt->value == NULL) {
Philipp Schafft's avatar
Philipp Schafft committed
838
839
                xmlFree(opt->name);
                free(opt);
840
841
842
843
                continue;
            }
            *next_option = opt;
            next_option = &opt->next;
844
845
846
847
848
849
850
851
        } else if (xmlStrcmp (child->name, XMLSTR("acl")) == 0) {
            if (!auth->acl) {
                auth->acl  = acl_new_from_xml_node(child);
            } else {
                ICECAST_LOG_ERROR("More than one ACL defined in role! Not supported (yet).");
            }
        } else {
            ICECAST_LOG_WARN("unknown auth setting (%H)", child->name);
852
        }
853
854
855
856
857
    } while ((child = child->next));

    if (!auth->acl) {
        /* If we did not get a <acl> try ACL as part of <role> (old style). */
        auth->acl  = acl_new_from_xml_node(node);
858
    }
Philipp Schafft's avatar
Philipp Schafft committed
859
860
    if (!auth->acl) {
        auth_release(auth);
Karl Heyes's avatar
Karl Heyes committed
861
        auth = NULL;
Philipp Schafft's avatar
Philipp Schafft committed
862
863
864
865
866
867
    } else {
        if (get_authenticator (auth, options) < 0) {
            auth_release(auth);
            auth = NULL;
        } else {
            auth->tailp = &auth->head;
868
869
870
871
            if (!auth->immediate) {
                auth->running = 1;
                auth->thread = thread_create("auth thread", auth_run_thread, auth, THREAD_ATTACHED);
            }
Philipp Schafft's avatar
Philipp Schafft committed
872
        }
Karl Heyes's avatar
Karl Heyes committed
873
    }
874

Philipp Schafft's avatar
Philipp Schafft committed
875
    while (options) {
876
877
        config_options_t *opt = options;
        options = opt->next;
Philipp Schafft's avatar
Philipp Schafft committed
878
879
        xmlFree(opt->name);
        xmlFree(opt->value);
880
        free (opt);
881
    }
Philipp Schafft's avatar
Philipp Schafft committed
882

883
    if (auth && !auth->management_url && (auth->adduser || auth->deleteuser || auth->listuser)) {
884
885
886
887
888
        char url[128];
        snprintf(url, sizeof(url), "/admin/manageauth.xsl?id=%lu", auth->id);
        auth->management_url = (char*)xmlCharStrdup(url);
    }

889
890
    return auth;
}
891

892
893
894
895
896
int auth_alter_client(auth_t *auth, auth_client *auth_user, auth_alter_t action, const char *arg)
{
    if (!auth || !auth_user || !arg)
        return -1;

897
898
899
900
901
    if (action < 0 || action >= (sizeof(auth->permission_alter)/sizeof(*(auth->permission_alter))))
        return -1;

    if (auth->permission_alter[action] != AUTH_MATCHTYPE_MATCH)
        return -1;
902
903
904
905
906
907
908
909

    if (replace_string(&(auth_user->alter_client_arg), arg) != 0)
        return -1;

    auth_user->alter_client_action = action;

    return 0;
}
910

911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
auth_alter_t auth_str2alter(const char *str)
{
    if (!str)
        return AUTH_ALTER_NOOP;

    if (strcasecmp(str, "noop") == 0) {
        return AUTH_ALTER_NOOP;
    } else if (strcasecmp(str, "rewrite") == 0) {
        return AUTH_ALTER_REWRITE;
    } else if (strcasecmp(str, "redirect") == 0) {
        return AUTH_ALTER_REDIRECT;
    } else if (strcasecmp(str, "redirect_see_other") == 0) {
        return AUTH_ALTER_REDIRECT_SEE_OTHER;
    } else if (strcasecmp(str, "redirect_temporary") == 0) {
        return AUTH_ALTER_REDIRECT_TEMPORARY;
    } else if (strcasecmp(str, "redirect_permanent") == 0) {
        return AUTH_ALTER_REDIRECT_PERMANENT;
    } else if (strcasecmp(str, "send_error") == 0) {
        return AUTH_ALTER_SEND_ERROR;
    } else {
        return AUTH_ALTER_NOOP;
    }
}

Philipp Schafft's avatar
Philipp Schafft committed
935
936
937
/* these are called at server start and termination */

void auth_initialise (void)
938
{
939
    thread_mutex_create(&_auth_lock);
Philipp Schafft's avatar
Philipp Schafft committed
940
}
941

Philipp Schafft's avatar
Philipp Schafft committed
942
943
944
void auth_shutdown (void)
{
    ICECAST_LOG_INFO("Auth shutdown");
945
    thread_mutex_destroy(&_auth_lock);
Philipp Schafft's avatar
Philipp Schafft committed
946
947
948
949
950
951
952
953
954
955
956
}

/* authstack functions */

static void __move_client_forward_in_auth_stack(client_t *client, void (*on_result)(client_t *client, void *userdata, auth_result result), void *userdata) {
    auth_stack_next(&client->authstack);
    if (client->authstack) {
        auth_stack_add_client(client->authstack, client, on_result, userdata);
    } else {
        if (on_result)
            on_result(client, userdata, AUTH_NOMATCH);
957
    }
Philipp Schafft's avatar
Philipp Schafft committed
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
}

void          auth_stack_add_client(auth_stack_t *stack, client_t *client, void (*on_result)(client_t *client, void *userdata, auth_result result), void *userdata) {
    auth_t *auth;

    if (!stack || !client || (client->authstack && client->authstack != stack))
        return;

    if (!client->authstack)
        auth_stack_addref(stack);
    client->authstack = stack;
    auth = auth_stack_get(stack);
    auth_add_client(auth, client, __move_client_forward_in_auth_stack, on_result, userdata);
    auth_release(auth);
}

void          auth_stack_release(auth_stack_t *stack) {
    if (!stack)
        return;

    thread_mutex_lock(&stack->lock);
    stack->refcount--;
    thread_mutex_unlock(&stack->lock);

    if (stack->refcount)
        return;

    auth_release(stack->auth);
986
    auth_stack_release(stack->next);
Philipp Schafft's avatar
Philipp Schafft committed
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
    thread_mutex_destroy(&stack->lock);
    free(stack);
}

void          auth_stack_addref(auth_stack_t *stack) {
    if (!stack)
        return;
    thread_mutex_lock(&stack->lock);
    stack->refcount++;
    thread_mutex_unlock(&stack->lock);
}

int           auth_stack_next(auth_stack_t **stack) {
    auth_stack_t *next;
    if (!stack || !*stack)
        return -1;
    thread_mutex_lock(&(*stack)->lock);
    next = (*stack)->next;
1005
    auth_stack_addref(next);
Philipp Schafft's avatar
Philipp Schafft committed
1006
1007
1008
1009
1010
    thread_mutex_unlock(&(*stack)->lock);
    auth_stack_release(*stack);
    *stack = next;
    if (!next)
        return 1;
1011
1012
1013
    return 0;
}

Philipp Schafft's avatar
Philipp Schafft committed
1014
1015
int           auth_stack_push(auth_stack_t **stack, auth_t *auth) {
    auth_stack_t *next;
1016

Philipp Schafft's avatar
Philipp Schafft committed
1017
1018
    if (!stack || !auth)
        return -1;
1019

Philipp Schafft's avatar
Philipp Schafft committed
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
    next = calloc(1, sizeof(*next));
    if (!next) {
        return -1;
    }
    thread_mutex_create(&next->lock);
    next->refcount = 1;
    next->auth = auth;
    auth_addref(auth);

    if (*stack) {
1030
1031
1032
        auth_stack_append(*stack, next);
        auth_stack_release(next);
        return 0;
Philipp Schafft's avatar
Philipp Schafft committed
1033
1034
1035
    } else {
        *stack = next;
        return 0;
1036
1037
1038
    }
}

Philipp Schafft's avatar
Philipp Schafft committed
1039
1040
int           auth_stack_append(auth_stack_t *stack, auth_stack_t *tail) {
    auth_stack_t *next, *cur;
1041

Philipp Schafft's avatar
Philipp Schafft committed
1042
1043
    if (!stack)
        return -1;
1044

Philipp Schafft's avatar
Philipp Schafft committed
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
    auth_stack_addref(cur = stack);
    thread_mutex_lock(&cur->lock);
    while (1) {
        next = cur->next;
        if (!cur->next)
            break;

        auth_stack_addref(next);
        thread_mutex_unlock(&cur->lock);
        auth_stack_release(cur);
        cur = next;
        thread_mutex_lock(&cur->lock);
1057
    }
Philipp Schafft's avatar
Philipp Schafft committed
1058
1059
1060
1061
1062
1063

    auth_stack_addref(cur->next = tail);
    thread_mutex_unlock(&cur->lock);
    auth_stack_release(cur);

    return 0;
1064
}
1065

Philipp Schafft's avatar
Philipp Schafft committed
1066
1067
auth_t       *auth_stack_get(auth_stack_t *stack) {
    auth_t *auth;
1068

Philipp Schafft's avatar
Philipp Schafft committed
1069
1070
    if (!stack)
        return NULL;
1071

1072
    thread_mutex_lock(&stack->lock);
Philipp Schafft's avatar
Philipp Schafft committed
1073
1074
1075
    auth_addref(auth = stack->auth);
    thread_mutex_unlock(&stack->lock);
    return auth;
1076
1077
}

1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
auth_t       *auth_stack_getbyid(auth_stack_t *stack, unsigned long id) {
    auth_t *ret = NULL;

    if (!stack)
        return NULL;

    auth_stack_addref(stack);

    while (!ret && stack) {
        auth_t *auth = auth_stack_get(stack);
        if (auth->id == id) {
            ret = auth;
            break;
        }
        auth_release(auth);
        auth_stack_next(&stack);
    }

    if (stack)
        auth_stack_release(stack);

    return ret;

}

1103
acl_t        *auth_stack_get_anonymous_acl(auth_stack_t *stack, httpp_request_type_e method) {
Philipp Schafft's avatar
Philipp Schafft committed
1104
1105
    acl_t *ret = NULL;

1106
    if (!stack || method < 0 || method > httpp_req_unknown)
Philipp Schafft's avatar
Philipp Schafft committed
1107
        return NULL;
1108

Philipp Schafft's avatar
Philipp Schafft committed
1109
1110
1111
1112
    auth_stack_addref(stack);

    while (!ret && stack) {
        auth_t *auth = auth_stack_get(stack);
1113
        if (auth->filter_method[method] != AUTH_MATCHTYPE_NOMATCH && strcmp(auth->type, AUTH_TYPE_ANONYMOUS) == 0) {
Philipp Schafft's avatar
Philipp Schafft committed
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
            acl_addref(ret = auth->acl);
        }
        auth_release(auth);

        if (!ret)
            auth_stack_next(&stack);
    }

    if (stack)
        auth_stack_release(stack);

    return ret;
}