bind.c 20.3 KB
Newer Older
Ondřej Kuzník's avatar
Ondřej Kuzník committed
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
 *
 * Copyright 1998-2020 The OpenLDAP Foundation.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted only as authorized by the OpenLDAP
 * Public License.
 *
 * A copy of this license is available in the file LICENSE in the
 * top-level directory of the distribution or, alternatively, at
 * <http://www.OpenLDAP.org/license.html>.
 */

#include "portable.h"

#include <ac/socket.h>
#include <ac/errno.h>
#include <ac/string.h>
#include <ac/time.h>
#include <ac/unistd.h>

#include "lutil.h"
25
#include "lload.h"
Ondřej Kuzník's avatar
Ondřej Kuzník committed
26

Ondřej Kuzník's avatar
Ondřej Kuzník committed
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
struct berval mech_external = BER_BVC("EXTERNAL");

int
bind_mech_external(
        LloadConnection *client,
        LloadOperation *op,
        struct berval *credentials )
{
    BerValue binddn;
    void *ssl;
    char *ptr;

    client->c_state = LLOAD_C_READY;
    client->c_type = LLOAD_C_OPEN;

    /*
     * We only support implicit assertion.
     *
     * Although RFC 4513 says the credentials field must be missing, RFC 4422
     * doesn't and libsasl2 will pass a zero-length string to send. We have to
     * allow that.
     */
    if ( !BER_BVISEMPTY( credentials ) ) {
        return operation_send_reject_locked( op, LDAP_UNWILLING_TO_PERFORM,
                "proxy authorization is not supported", 1 );
    }

    ssl = ldap_pvt_tls_sb_ctx( client->c_sb );
    if ( !ssl || ldap_pvt_tls_get_peer_dn( ssl, &binddn, NULL, 0 ) ) {
        return operation_send_reject_locked( op, LDAP_INVALID_CREDENTIALS,
                "no externally negotiated identity", 1 );
    }
    client->c_auth.bv_len = binddn.bv_len + STRLENOF("dn:");
    client->c_auth.bv_val = ch_malloc( client->c_auth.bv_len + 1 );

    ptr = lutil_strcopy( client->c_auth.bv_val, "dn:" );
    ptr = lutil_strncopy( ptr, binddn.bv_val, binddn.bv_len );
    *ptr = '\0';

    ber_memfree( binddn.bv_val );

    if ( !ber_bvstrcasecmp( &client->c_auth, &lloadd_identity ) ) {
        client->c_type = LLOAD_C_PRIVILEGED;
    }

    return operation_send_reject_locked( op, LDAP_SUCCESS, "", 1 );
}

Ondřej Kuzník's avatar
Ondřej Kuzník committed
75
/*
76
77
 * On entering the function, we've put a reference on both connections and hold
 * upstream's c_io_mutex.
Ondřej Kuzník's avatar
Ondřej Kuzník committed
78
 */
Ondřej Kuzník's avatar
Ondřej Kuzník committed
79
static int
80
81
82
83
84
client_bind(
        LloadOperation *op,
        struct berval *binddn,
        ber_tag_t tag,
        struct berval *auth )
Ondřej Kuzník's avatar
Ondřej Kuzník committed
85
{
86
    LloadConnection *upstream = op->o_upstream;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
87

88
    ber_printf( upstream->c_pendingber, "t{titOtO}", LDAP_TAG_MESSAGE,
Ondřej Kuzník's avatar
Ondřej Kuzník committed
89
90
91
92
93
94
95
            LDAP_TAG_MSGID, op->o_upstream_msgid,
            LDAP_REQ_BIND, &op->o_request,
            LDAP_TAG_CONTROLS, BER_BV_OPTIONAL( &op->o_ctrls ) );

    return 0;
}

96
#ifdef LDAP_API_FEATURE_VERIFY_CREDENTIALS
Ondřej Kuzník's avatar
Ondřej Kuzník committed
97
/*
98
99
 * On entering the function, we've put a reference on both connections and hold
 * upstream's c_io_mutex.
Ondřej Kuzník's avatar
Ondřej Kuzník committed
100
 */
Ondřej Kuzník's avatar
Ondřej Kuzník committed
101
static int
102
103
104
105
106
client_bind_as_vc(
        LloadOperation *op,
        struct berval *binddn,
        ber_tag_t tag,
        struct berval *auth )
Ondřej Kuzník's avatar
Ondřej Kuzník committed
107
{
108
    LloadConnection *upstream = op->o_upstream;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
109

110
    CONNECTION_LOCK(upstream);
111
    ber_printf( upstream->c_pendingber, "t{tit{tst{{tOOtOtO}}}}", LDAP_TAG_MESSAGE,
Ondřej Kuzník's avatar
Ondřej Kuzník committed
112
113
114
115
            LDAP_TAG_MSGID, op->o_upstream_msgid,
            LDAP_REQ_EXTENDED,
            LDAP_TAG_EXOP_REQ_OID, LDAP_EXOP_VERIFY_CREDENTIALS,
            LDAP_TAG_EXOP_REQ_VALUE,
Ondřej Kuzník's avatar
Ondřej Kuzník committed
116
            LDAP_TAG_EXOP_VERIFY_CREDENTIALS_COOKIE, BER_BV_OPTIONAL( &upstream->c_vc_cookie ),
Ondřej Kuzník's avatar
Ondřej Kuzník committed
117
118
            &binddn, tag, &auth,
            LDAP_TAG_EXOP_VERIFY_CREDENTIALS_CONTROLS, BER_BV_OPTIONAL( &op->o_ctrls ) );
119
    CONNECTION_UNLOCK(upstream);
Ondřej Kuzník's avatar
Ondřej Kuzník committed
120
121
    return 0;
}
122
#endif /* LDAP_API_FEATURE_VERIFY_CREDENTIALS */
Ondřej Kuzník's avatar
Ondřej Kuzník committed
123

124
int
125
request_bind( LloadConnection *client, LloadOperation *op )
Ondřej Kuzník's avatar
Ondřej Kuzník committed
126
{
127
128
129
130
131
    LloadConnection *upstream = NULL;
    BerElement *ber, *copy;
    struct berval binddn, auth;
    ber_int_t version;
    ber_tag_t tag;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
132
    unsigned long pin = client->c_pin_id;
133
    int res, rc = LDAP_SUCCESS;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
134

Ondřej Kuzník's avatar
Ondřej Kuzník committed
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
    if ( pin ) {
        LloadOperation *pinned_op, needle = {
            .o_client_connid = client->c_connid,
            .o_client_msgid = 0,
            .o_pin_id = client->c_pin_id,
        };

        Debug( LDAP_DEBUG_CONNS, "request_bind: "
                "client connid=%lu is pinned pin=%lu\n",
                client->c_connid, pin );

        pinned_op =
                tavl_delete( &client->c_ops, &needle, operation_client_cmp );
        if ( pinned_op ) {
            assert( op->o_tag == pinned_op->o_tag );

            pinned_op->o_client_msgid = op->o_client_msgid;

            /* Preserve the new BerElement and its pointers, reclaim the old
             * one in operation_destroy_from_client if it's still there */
            needle.o_ber = pinned_op->o_ber;
            pinned_op->o_ber = op->o_ber;
            op->o_ber = needle.o_ber;

            pinned_op->o_request = op->o_request;
            pinned_op->o_ctrls = op->o_ctrls;

            /*
             * pinned_op is accessible from the upstream, protect it since we
             * lose the client lock in operation_destroy_from_client temporarily
             */
            pinned_op->o_client_refcnt++;
            operation_destroy_from_client( op );
            pinned_op->o_client_refcnt--;

            op = pinned_op;
        }
    }

174
    /* protect the Bind operation */
Ondřej Kuzník's avatar
Ondřej Kuzník committed
175
    op->o_client_refcnt++;
176
    tavl_delete( &client->c_ops, op, operation_client_cmp );
177

178
    client_reset( client );
179

180
181
    client->c_state = LLOAD_C_BINDING;
    client->c_type = LLOAD_C_OPEN;
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
    if ( (copy = ber_alloc()) == NULL ) {
        goto fail;
    }
    ber_init2( copy, &op->o_request, 0 );

    tag = ber_get_int( copy, &version );
    if ( tag == LBER_ERROR ) {
        Debug( LDAP_DEBUG_PACKETS, "request_bind: "
                "failed to parse version field\n" );
        goto fail;
    } else if ( version != LDAP_VERSION3 ) {
        operation_send_reject_locked(
                op, LDAP_PROTOCOL_ERROR, "LDAP version unsupported", 1 );
        ber_free( copy, 0 );
        return LDAP_SUCCESS;
    }

    tag = ber_get_stringbv( copy, &binddn, LBER_BV_NOTERM );
    if ( tag == LBER_ERROR ) {
        Debug( LDAP_DEBUG_PACKETS, "request_bind: "
                "failed to parse bind name field\n" );
        goto fail;
    }

    tag = ber_skip_element( copy, &auth );
    if ( tag == LDAP_AUTH_SIMPLE ) {
        if ( !BER_BVISNULL( &client->c_auth ) ) {
            ch_free( client->c_auth.bv_val );
        }
        if ( !BER_BVISEMPTY( &binddn ) ) {
            char *ptr;
            client->c_auth.bv_len = STRLENOF("dn:") + binddn.bv_len;
            client->c_auth.bv_val = ch_malloc( client->c_auth.bv_len + 1 );

            ptr = lutil_strcopy( client->c_auth.bv_val, "dn:" );
            ptr = lutil_strncopy( ptr, binddn.bv_val, binddn.bv_len );
            *ptr = '\0';
        } else {
            BER_BVZERO( &client->c_auth );
        }

        if ( !BER_BVISNULL( &client->c_sasl_bind_mech ) ) {
            ber_memfree( client->c_sasl_bind_mech.bv_val );
            BER_BVZERO( &client->c_sasl_bind_mech );
        }
    } else if ( tag == LDAP_AUTH_SASL ) {
Ondřej Kuzník's avatar
Ondřej Kuzník committed
229
230
231
232
233
234
235
        struct berval mech;

        ber_init2( copy, &auth, 0 );

        if ( ber_get_stringbv( copy, &mech, LBER_BV_NOTERM ) == LBER_ERROR ) {
            goto fail;
        }
Ondřej Kuzník's avatar
Ondřej Kuzník committed
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
        if ( !ber_bvcmp( &mech, &mech_external ) ) {
            struct berval credentials = BER_BVNULL;

            ber_get_stringbv( copy, &credentials, LBER_BV_NOTERM );
            rc = bind_mech_external( client, op, &credentials );

            /* terminate the upstream side if client switched mechanisms */
            if ( !BER_BVISNULL( &client->c_sasl_bind_mech ) ) {
                op->o_client_refcnt++;
                CONNECTION_UNLOCK_INCREF(client);
                operation_abandon( op );
                CONNECTION_LOCK_DECREF(client);

                ber_memfree( client->c_sasl_bind_mech.bv_val );
                BER_BVZERO( &client->c_sasl_bind_mech );
            }

            ber_free( copy, 0 );
            return rc;
        } else if ( BER_BVISNULL( &client->c_sasl_bind_mech ) ) {
Ondřej Kuzník's avatar
Ondřej Kuzník committed
256
            ber_dupbv( &client->c_sasl_bind_mech, &mech );
Ondřej Kuzník's avatar
Ondřej Kuzník committed
257
258
        } else if ( ber_bvcmp( &mech, &client->c_sasl_bind_mech ) ) {
            ber_bvreplace( &client->c_sasl_bind_mech, &mech );
Ondřej Kuzník's avatar
Ondřej Kuzník committed
259
        }
260
261
262
263
    } else {
        goto fail;
    }

264
265
    rc = tavl_insert( &client->c_ops, op, operation_client_cmp, avl_dup_error );
    assert( rc == LDAP_SUCCESS );
266
    CONNECTION_UNLOCK_INCREF(client);
Ondřej Kuzník's avatar
Ondřej Kuzník committed
267

Ondřej Kuzník's avatar
Ondřej Kuzník committed
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
    if ( pin ) {
        ldap_pvt_thread_mutex_lock( &op->o_link_mutex );
        upstream = op->o_upstream;
        if ( upstream ) {
            CONNECTION_LOCK(upstream);
            if ( !upstream->c_live ) {
                CONNECTION_UNLOCK(upstream);
                upstream = NULL;
            }
        }
        ldap_pvt_thread_mutex_unlock( &op->o_link_mutex );
    }

    /* If we were pinned but lost the link, don't look for a new upstream, we
     * have to reject the op and clear pin */
    if ( upstream ) {
        CONNECTION_UNLOCK_INCREF(upstream);
        ldap_pvt_thread_mutex_lock( &upstream->c_io_mutex );
    } else if ( !pin ) {
        upstream = backend_select( op, &res );
    } else {
        Debug( LDAP_DEBUG_STATS, "request_bind: "
                "connid=%lu, msgid=%d pinned upstream lost\n",
                op->o_client_connid, op->o_client_msgid );
        operation_send_reject( op, LDAP_UNAVAILABLE,
                "connection to the remote server has been severed", 1 );
        pin = 0;
        goto done;
    }

Ondřej Kuzník's avatar
Ondřej Kuzník committed
298
    if ( !upstream ) {
299
        Debug( LDAP_DEBUG_STATS, "request_bind: "
Ondřej Kuzník's avatar
Ondřej Kuzník committed
300
301
                "connid=%lu, msgid=%d no available connection found\n",
                op->o_client_connid, op->o_client_msgid );
302
        operation_send_reject( op, res, "no connections available", 1 );
Ondřej Kuzník's avatar
Ondřej Kuzník committed
303
        assert( client->c_pin_id == 0 );
304
305
306
307
308
309
310
311
312
313
314
        goto done;
    }

    ber = upstream->c_pendingber;
    if ( ber == NULL && (ber = ber_alloc()) == NULL ) {
        Debug( LDAP_DEBUG_ANY, "request_bind: "
                "ber_alloc failed\n" );
        ldap_pvt_thread_mutex_unlock( &upstream->c_io_mutex );
        CONNECTION_LOCK_DECREF(upstream);
        CONNECTION_UNLOCK_OR_DESTROY(upstream);

315
        CONNECTION_LOCK_DECREF(client);
316
        goto fail;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
317
    }
318
    upstream->c_pendingber = ber;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
319

320
    CONNECTION_LOCK(upstream);
Ondřej Kuzník's avatar
Ondřej Kuzník committed
321
322
323
324
325
326
327
328
329
330
331
332
    if ( pin ) {
        tavl_delete( &upstream->c_ops, op, operation_upstream_cmp );
    } else if ( tag == LDAP_AUTH_SASL && !op->o_pin_id ) {
        ldap_pvt_thread_mutex_lock( &lload_pin_mutex );
        pin = op->o_pin_id = lload_next_pin++;
        Debug( LDAP_DEBUG_CONNS, "request_bind: "
                "client connid=%lu allocated pin=%lu linking it to upstream "
                "connid=%lu\n",
                op->o_client_connid, pin, upstream->c_connid );
        ldap_pvt_thread_mutex_unlock( &lload_pin_mutex );
    }

Ondřej Kuzník's avatar
Ondřej Kuzník committed
333
    op->o_upstream = upstream;
334
    op->o_upstream_connid = upstream->c_connid;
335
336
337
338
339
340
341
342
343
344
345
346
    op->o_upstream_msgid = upstream->c_next_msgid++;

    Debug( LDAP_DEBUG_TRACE, "request_bind: "
            "added bind from client connid=%lu to upstream connid=%lu "
            "as msgid=%d\n",
            op->o_client_connid, op->o_upstream_connid, op->o_upstream_msgid );
    if ( tavl_insert( &upstream->c_ops, op, operation_upstream_cmp,
                 avl_dup_error ) ) {
        assert(0);
    }
    upstream->c_state = LLOAD_C_BINDING;
    CONNECTION_UNLOCK(upstream);
347
348

#ifdef LDAP_API_FEATURE_VERIFY_CREDENTIALS
Ondřej Kuzník's avatar
Ondřej Kuzník committed
349
    if ( lload_features & LLOAD_FEATURE_VC ) {
350
        rc = client_bind_as_vc( op, &binddn, tag, &auth );
351
352
353
    } else
#endif /* LDAP_API_FEATURE_VERIFY_CREDENTIALS */
    {
354
        rc = client_bind( op, &binddn, tag, &auth );
Ondřej Kuzník's avatar
Ondřej Kuzník committed
355
356
    }

357
358
359
360
361
362
363
done:
    if ( rc == LDAP_SUCCESS ) {
        CONNECTION_LOCK(client);
        if ( upstream ) {
            ldap_pvt_thread_mutex_unlock( &upstream->c_io_mutex );
        }

Ondřej Kuzník's avatar
Ondřej Kuzník committed
364
        client->c_pin_id = pin;
365
366
367
368
369
        if ( !--op->o_client_refcnt || !upstream ) {
            operation_destroy_from_client( op );
            if ( client->c_state == LLOAD_C_BINDING ) {
                client->c_state = LLOAD_C_READY;
                client->c_type = LLOAD_C_OPEN;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
370
                client->c_pin_id = 0;
371
372
373
374
375
376
377
378
379
380
381
                if ( !BER_BVISNULL( &client->c_auth ) ) {
                    ch_free( client->c_auth.bv_val );
                    BER_BVZERO( &client->c_auth );
                }
                if ( !BER_BVISNULL( &client->c_sasl_bind_mech ) ) {
                    ber_memfree( client->c_sasl_bind_mech.bv_val );
                    BER_BVZERO( &client->c_sasl_bind_mech );
                }
            }
        }
        CONNECTION_UNLOCK(client);
382

383
384
385
386
387
388
389
390
391
392
393
        if ( upstream ) {
            connection_write_cb( -1, 0, upstream );
            CONNECTION_LOCK_DECREF(upstream);
            CONNECTION_UNLOCK_OR_DESTROY(upstream);
        }
        CONNECTION_LOCK_DECREF(client);
    } else {
fail:
        rc = -1;

        CONNECTION_LOCK_DECREF(client);
Ondřej Kuzník's avatar
Ondřej Kuzník committed
394
395
        op->o_client_refcnt--;
        operation_destroy_from_client( op );
Ondřej Kuzník's avatar
Ondřej Kuzník committed
396
        client->c_pin_id = 0;
397
        CONNECTION_DESTROY(client);
Ondřej Kuzník's avatar
Ondřej Kuzník committed
398
    }
Ondřej Kuzník's avatar
Ondřej Kuzník committed
399

400
    ber_free( copy, 0 );
401
    return rc;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
402
}
Ondřej Kuzník's avatar
Ondřej Kuzník committed
403
404

int
405
406
407
408
handle_bind_response(
        LloadConnection *client,
        LloadOperation *op,
        BerElement *ber )
Ondřej Kuzník's avatar
Ondřej Kuzník committed
409
{
410
    LloadConnection *upstream = op->o_upstream;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
411
412
    BerValue response;
    BerElement *copy;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
413
    LloadOperation *removed;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
    ber_int_t result;
    ber_tag_t tag;
    int rc = LDAP_SUCCESS;

    if ( (copy = ber_alloc()) == NULL ) {
        rc = -1;
        goto done;
    }

    tag = ber_peek_element( ber, &response );
    assert( tag == LDAP_RES_BIND );

    ber_init2( copy, &response, 0 );

    tag = ber_get_enum( copy, &result );
    ber_free( copy, 0 );

    if ( tag == LBER_ERROR ) {
        rc = -1;
        goto done;
    }

    Debug( LDAP_DEBUG_STATS, "handle_bind_response: "
            "received response for bind request msgid=%d by client "
            "connid=%lu, result=%d\n",
            op->o_client_msgid, op->o_client_connid, result );

    CONNECTION_LOCK(upstream);
    if ( result != LDAP_SASL_BIND_IN_PROGRESS ) {
        upstream->c_state = LLOAD_C_READY;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
444
445
446
447
448
449
450
451
452
        op->o_pin_id = 0;
    } else {
        if ( tavl_delete( &upstream->c_ops, op, operation_upstream_cmp ) ) {
            op->o_upstream_msgid = 0;
            op->o_upstream_refcnt++;
            rc = tavl_insert( &upstream->c_ops, op, operation_upstream_cmp,
                    avl_dup_error );
            assert( rc == LDAP_SUCCESS );
        }
Ondřej Kuzník's avatar
Ondřej Kuzník committed
453
454
455
456
    }
    CONNECTION_UNLOCK(upstream);

    CONNECTION_LOCK(client);
Ondřej Kuzník's avatar
Ondřej Kuzník committed
457
458
459
    removed = tavl_delete( &client->c_ops, op, operation_client_cmp );
    assert( !removed || op == removed );

Ondřej Kuzník's avatar
Ondřej Kuzník committed
460
461
462
    if ( client->c_state == LLOAD_C_BINDING ) {
        switch ( result ) {
            case LDAP_SASL_BIND_IN_PROGRESS:
Ondřej Kuzník's avatar
Ondřej Kuzník committed
463
464
465
466
                op->o_client_msgid = 0;
                rc = tavl_insert( &client->c_ops, op, operation_client_cmp,
                        avl_dup_error );
                assert( rc == LDAP_SUCCESS );
Ondřej Kuzník's avatar
Ondřej Kuzník committed
467
468
469
                break;
            case LDAP_SUCCESS:
            default: {
Ondřej Kuzník's avatar
Ondřej Kuzník committed
470
                op->o_client = NULL;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
471
472
                client->c_state = LLOAD_C_READY;
                client->c_type = LLOAD_C_OPEN;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
473
                client->c_pin_id = 0;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
                if ( result != LDAP_SUCCESS ) {
                    ber_memfree( client->c_auth.bv_val );
                    BER_BVZERO( &client->c_auth );
                } else if ( !ber_bvstrcasecmp(
                                    &client->c_auth, &lloadd_identity ) ) {
                    client->c_type = LLOAD_C_PRIVILEGED;
                }
                if ( !BER_BVISNULL( &client->c_sasl_bind_mech ) ) {
                    ber_memfree( client->c_sasl_bind_mech.bv_val );
                    BER_BVZERO( &client->c_sasl_bind_mech );
                }
                break;
            }
        }
    } else {
        assert( client->c_state == LLOAD_C_INVALID ||
                client->c_state == LLOAD_C_CLOSING );
    }
    CONNECTION_UNLOCK(client);

done:
    if ( rc ) {
Ondřej Kuzník's avatar
Ondřej Kuzník committed
496
        operation_send_reject( op, LDAP_OTHER, "internal error", 1 );
Ondřej Kuzník's avatar
Ondřej Kuzník committed
497
498
499
500

        ber_free( ber, 1 );
        return LDAP_SUCCESS;
    }
501
    return forward_final_response( client, op, ber );
Ondřej Kuzník's avatar
Ondřej Kuzník committed
502
503
504
505
}

#ifdef LDAP_API_FEATURE_VERIFY_CREDENTIALS
int
506
507
508
509
handle_vc_bind_response(
        LloadConnection *client,
        LloadOperation *op,
        BerElement *ber )
Ondřej Kuzník's avatar
Ondřej Kuzník committed
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
{
    BerElement *output;
    BerValue matched, diagmsg, creds = BER_BVNULL, controls = BER_BVNULL;
    ber_int_t result;
    ber_tag_t tag;
    ber_len_t len;
    int rc = 0;

    tag = ber_scanf( ber, "{emm" /* "}" */,
            &result, &matched, &diagmsg );
    if ( tag == LBER_ERROR ) {
        rc = -1;
        goto done;
    }

    tag = ber_peek_tag( ber, &len );
    if ( result == LDAP_PROTOCOL_ERROR ) {
527
528
        LloadConnection *upstream = op->o_upstream;
        LloadBackend *b;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
529
530

        CONNECTION_LOCK(upstream);
531
        b = (LloadBackend *)upstream->c_private;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
532
533
534
535
536
537
538
539
540
541
542
        Debug( LDAP_DEBUG_ANY, "handle_vc_bind_response: "
                "VC extended operation not supported on backend %s\n",
                b->b_uri.bv_val );
        CONNECTION_UNLOCK(upstream);
    }

    Debug( LDAP_DEBUG_STATS, "handle_vc_bind_response: "
            "received response for bind request msgid=%d by client "
            "connid=%lu, result=%d\n",
            op->o_client_msgid, op->o_client_connid, result );

543
    CONNECTION_LOCK(client);
Ondřej Kuzník's avatar
Ondřej Kuzník committed
544
545

    if ( tag == LDAP_TAG_EXOP_VERIFY_CREDENTIALS_COOKIE ) {
546
547
        if ( !BER_BVISNULL( &client->c_vc_cookie ) ) {
            ber_memfree( client->c_vc_cookie.bv_val );
Ondřej Kuzník's avatar
Ondřej Kuzník committed
548
        }
549
        tag = ber_scanf( ber, "o", &client->c_vc_cookie );
Ondřej Kuzník's avatar
Ondřej Kuzník committed
550
551
        if ( tag == LBER_ERROR ) {
            rc = -1;
552
            CONNECTION_UNLOCK_INCREF(client);
Ondřej Kuzník's avatar
Ondřej Kuzník committed
553
554
555
556
557
558
559
560
561
            goto done;
        }
        tag = ber_peek_tag( ber, &len );
    }

    if ( tag == LDAP_TAG_EXOP_VERIFY_CREDENTIALS_SCREDS ) {
        tag = ber_scanf( ber, "m", &creds );
        if ( tag == LBER_ERROR ) {
            rc = -1;
562
            CONNECTION_UNLOCK_INCREF(client);
Ondřej Kuzník's avatar
Ondřej Kuzník committed
563
564
565
566
567
568
569
570
571
            goto done;
        }
        tag = ber_peek_tag( ber, &len );
    }

    if ( tag == LDAP_TAG_EXOP_VERIFY_CREDENTIALS_CONTROLS ) {
        tag = ber_scanf( ber, "m", &controls );
        if ( tag == LBER_ERROR ) {
            rc = -1;
572
            CONNECTION_UNLOCK_INCREF(client);
Ondřej Kuzník's avatar
Ondřej Kuzník committed
573
574
575
576
            goto done;
        }
    }

577
    if ( client->c_state == LLOAD_C_BINDING ) {
Ondřej Kuzník's avatar
Ondřej Kuzník committed
578
579
580
581
582
        switch ( result ) {
            case LDAP_SASL_BIND_IN_PROGRESS:
                break;
            case LDAP_SUCCESS:
            default: {
583
584
                client->c_state = LLOAD_C_READY;
                client->c_type = LLOAD_C_OPEN;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
585
                client->c_pin_id = 0;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
586
                if ( result != LDAP_SUCCESS ) {
587
588
                    ber_memfree( client->c_auth.bv_val );
                    BER_BVZERO( &client->c_auth );
Ondřej Kuzník's avatar
Ondřej Kuzník committed
589
                } else if ( !ber_bvstrcasecmp(
590
591
                                    &client->c_auth, &lloadd_identity ) ) {
                    client->c_type = LLOAD_C_PRIVILEGED;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
592
                }
593
594
595
                if ( !BER_BVISNULL( &client->c_vc_cookie ) ) {
                    ber_memfree( client->c_vc_cookie.bv_val );
                    BER_BVZERO( &client->c_vc_cookie );
Ondřej Kuzník's avatar
Ondřej Kuzník committed
596
                }
597
598
599
                if ( !BER_BVISNULL( &client->c_sasl_bind_mech ) ) {
                    ber_memfree( client->c_sasl_bind_mech.bv_val );
                    BER_BVZERO( &client->c_sasl_bind_mech );
Ondřej Kuzník's avatar
Ondřej Kuzník committed
600
601
602
603
604
                }
                break;
            }
        }
    } else {
605
606
        assert( client->c_state == LLOAD_C_INVALID ||
                client->c_state == LLOAD_C_CLOSING );
Ondřej Kuzník's avatar
Ondřej Kuzník committed
607
    }
608
    CONNECTION_UNLOCK_INCREF(client);
Ondřej Kuzník's avatar
Ondřej Kuzník committed
609

610
611
    ldap_pvt_thread_mutex_lock( &client->c_io_mutex );
    output = client->c_pendingber;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
612
613
    if ( output == NULL && (output = ber_alloc()) == NULL ) {
        rc = -1;
614
        ldap_pvt_thread_mutex_unlock( &client->c_io_mutex );
Ondřej Kuzník's avatar
Ondřej Kuzník committed
615
616
        goto done;
    }
617
    client->c_pendingber = output;
Ondřej Kuzník's avatar
Ondřej Kuzník committed
618
619
620
621
622
623
624

    rc = ber_printf( output, "t{tit{eOOtO}tO}", LDAP_TAG_MESSAGE,
            LDAP_TAG_MSGID, op->o_client_msgid, LDAP_RES_BIND,
            result, &matched, &diagmsg,
            LDAP_TAG_SASL_RES_CREDS, BER_BV_OPTIONAL( &creds ),
            LDAP_TAG_CONTROLS, BER_BV_OPTIONAL( &controls ) );

625
    ldap_pvt_thread_mutex_unlock( &client->c_io_mutex );
Ondřej Kuzník's avatar
Ondřej Kuzník committed
626
    if ( rc >= 0 ) {
627
        connection_write_cb( -1, 0, client );
Ondřej Kuzník's avatar
Ondřej Kuzník committed
628
629
630
631
        rc = 0;
    }

done:
632
    CONNECTION_LOCK_DECREF(client);
Ondřej Kuzník's avatar
Ondřej Kuzník committed
633
    operation_destroy_from_client( op );
634
    CONNECTION_UNLOCK_OR_DESTROY(client);
Ondřej Kuzník's avatar
Ondřej Kuzník committed
635
636
637
638
    ber_free( ber, 1 );
    return rc;
}
#endif /* LDAP_API_FEATURE_VERIFY_CREDENTIALS */