summaryrefslogtreecommitdiff
path: root/src/providers/ldap/ldap_init.c
blob: 2e30c37edb707799baada3d695776ae602c6a7eb (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
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
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
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
/*
    SSSD

    LDAP Provider Initialization functions

    Authors:
        Simo Sorce <ssorce@redhat.com>

    Copyright (C) 2009 Red Hat

    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 "util/child_common.h"
#include "providers/ldap/ldap_common.h"
#include "providers/ldap/sdap_async_private.h"
#include "providers/ldap/sdap_access.h"
#include "providers/ldap/sdap_sudo.h"
#include "providers/ldap/sdap_autofs.h"
#include "providers/ldap/sdap_idmap.h"
#include "providers/fail_over_srv.h"

static void sdap_shutdown(struct be_req *req);

/* Id Handler */
struct bet_ops sdap_id_ops = {
    .handler = sdap_account_info_handler,
    .finalize = sdap_shutdown,
    .check_online = sdap_check_online
};

/* Auth Handler */
struct bet_ops sdap_auth_ops = {
    .handler = sdap_pam_auth_handler,
    .finalize = sdap_shutdown
};

/* Chpass Handler */
struct bet_ops sdap_chpass_ops = {
    .handler = sdap_pam_chpass_handler,
    .finalize = sdap_shutdown
};

/* Access Handler */
struct bet_ops sdap_access_ops = {
    .handler = sdap_pam_access_handler,
    .finalize = sdap_shutdown
};

/* Please use this only for short lists */
errno_t check_order_list_for_duplicates(char **list,
                                        bool case_sensitive)
{
    size_t c;
    size_t d;
    int cmp;

    for (c = 0; list[c] != NULL; c++) {
        for (d = c + 1; list[d] != NULL; d++) {
            if (case_sensitive) {
                cmp = strcmp(list[c], list[d]);
            } else {
                cmp = strcasecmp(list[c], list[d]);
            }
            if (cmp == 0) {
                DEBUG(1, ("Duplicate string [%s] found.\n", list[c]));
                return EINVAL;
            }
        }
    }

    return EOK;
}

int sssm_ldap_id_init(struct be_ctx *bectx,
                      struct bet_ops **ops,
                      void **pvt_data)
{
    struct sdap_id_ctx *ctx;
    const char *urls;
    const char *backup_urls;
    const char *dns_service_name;
    const char *sasl_mech;
    int ret;

    /* If we're already set up, just return that */
    if(bectx->bet_info[BET_ID].mod_name &&
       strcmp("ldap", bectx->bet_info[BET_ID].mod_name) == 0) {
        DEBUG(8, ("Re-using sdap_id_ctx for this provider\n"));
        *ops = bectx->bet_info[BET_ID].bet_ops;
        *pvt_data = bectx->bet_info[BET_ID].pvt_bet_data;
        return EOK;
    }

    ctx = talloc_zero(bectx, struct sdap_id_ctx);
    if (!ctx) return ENOMEM;

    ctx->be = bectx;

    ret = ldap_get_options(ctx, bectx->cdb,
                           bectx->conf_path, &ctx->opts);
    if (ret != EOK) {
        goto done;
    }

    dns_service_name = dp_opt_get_string(ctx->opts->basic,
                                         SDAP_DNS_SERVICE_NAME);
    DEBUG(7, ("Service name for discovery set to %s\n", dns_service_name));

    urls = dp_opt_get_string(ctx->opts->basic, SDAP_URI);
    backup_urls = dp_opt_get_string(ctx->opts->basic, SDAP_BACKUP_URI);

    ret = sdap_service_init(ctx, ctx->be, "LDAP",
                            dns_service_name, urls, backup_urls,
                            &ctx->service);
    if (ret != EOK) {
        DEBUG(1, ("Failed to initialize failover service!\n"));
        goto done;
    }

    sasl_mech = dp_opt_get_string(ctx->opts->basic, SDAP_SASL_MECH);
    if (sasl_mech && strcasecmp(sasl_mech, "GSSAPI") == 0) {
        if (dp_opt_get_bool(ctx->opts->basic, SDAP_KRB5_KINIT)) {
            ret = sdap_gssapi_init(ctx, ctx->opts->basic,
                                   ctx->be, ctx->service,
                                   &ctx->krb5_service);
            if (ret !=  EOK) {
                DEBUG(1, ("sdap_gssapi_init failed [%d][%s].\n",
                            ret, strerror(ret)));
                goto done;
            }
        }
    }

    ret = setup_tls_config(ctx->opts->basic);
    if (ret != EOK) {
        DEBUG(1, ("setup_tls_config failed [%d][%s].\n",
                  ret, strerror(ret)));
        goto done;
    }

    ret = sdap_id_conn_cache_create(ctx, ctx, &ctx->conn_cache);
    if (ret != EOK) {
        goto done;
    }

    if (dp_opt_get_bool(ctx->opts->basic, SDAP_ID_MAPPING)) {
        /* Set up the ID mapping object */
        ret = sdap_idmap_init(ctx, ctx, &ctx->opts->idmap_ctx);
        if (ret != EOK) goto done;
    }

    ret = sdap_id_setup_tasks(ctx);
    if (ret != EOK) {
        goto done;
    }

    ret = setup_child(ctx);
    if (ret != EOK) {
        DEBUG(1, ("setup_child failed [%d][%s].\n",
                  ret, strerror(ret)));
        goto done;
    }

    /* setup SRV lookup plugin */
    ret = be_fo_set_dns_srv_lookup_plugin(bectx, NULL);
    if (ret != EOK) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("Unable to set SRV lookup plugin "
                                    "[%d]: %s\n", ret, strerror(ret)));
        goto done;
    }

    *ops = &sdap_id_ops;
    *pvt_data = ctx;
    ret = EOK;

done:
    if (ret != EOK) {
        talloc_free(ctx);
    }
    return ret;
}

int sssm_ldap_auth_init(struct be_ctx *bectx,
                        struct bet_ops **ops,
                        void **pvt_data)
{
    void *data;
    struct sdap_id_ctx *id_ctx;
    struct sdap_auth_ctx *ctx;
    int ret;

    ret = sssm_ldap_id_init(bectx, ops, &data);
    if (ret == EOK) {
        id_ctx = talloc_get_type(data, struct sdap_id_ctx);

        ctx = talloc(bectx, struct sdap_auth_ctx);
        if (!ctx) return ENOMEM;

        ctx->be = bectx;
        ctx->opts = id_ctx->opts;
        ctx->service = id_ctx->service;
        ctx->chpass_service = NULL;

        *ops = &sdap_auth_ops;
        *pvt_data = ctx;
    }

    return ret;
}

int sssm_ldap_chpass_init(struct be_ctx *bectx,
                          struct bet_ops **ops,
                          void **pvt_data)
{
    int ret;
    void *data;
    struct sdap_auth_ctx *ctx = NULL;
    const char *urls;
    const char *backup_urls;
    const char *dns_service_name;

    ret = sssm_ldap_auth_init(bectx, ops, &data);
    if (ret != EOK) {
        DEBUG(1, ("sssm_ldap_auth_init failed.\n"));
        goto done;
    }

    ctx = talloc_get_type(data, struct sdap_auth_ctx);

    dns_service_name = dp_opt_get_string(ctx->opts->basic,
                                         SDAP_CHPASS_DNS_SERVICE_NAME);
    if (dns_service_name) {
        DEBUG(7, ("Service name for chpass discovery set to %s\n",
                  dns_service_name));
    }

    urls = dp_opt_get_string(ctx->opts->basic, SDAP_CHPASS_URI);
    backup_urls = dp_opt_get_string(ctx->opts->basic, SDAP_CHPASS_BACKUP_URI);
    if (!urls && !backup_urls && !dns_service_name) {
        DEBUG(9, ("ldap_chpass_uri and ldap_chpass_dns_service_name not set, "
                  "using ldap_uri.\n"));
        ctx->chpass_service = NULL;
    } else {
        ret = sdap_service_init(ctx, ctx->be, "LDAP_CHPASS", dns_service_name,
                                urls, backup_urls, &ctx->chpass_service);
        if (ret != EOK) {
            DEBUG(1, ("Failed to initialize failover service!\n"));
            goto done;
        }
    }


    *ops = &sdap_chpass_ops;
    *pvt_data = ctx;
    ret = EOK;

done:
    if (ret != EOK) {
        talloc_free(ctx);
    }
    return ret;
}

int sssm_ldap_access_init(struct be_ctx *bectx,
                          struct bet_ops **ops,
                          void **pvt_data)
{
    int ret;
    struct sdap_access_ctx *access_ctx;
    const char *filter;
    const char *order;
    char **order_list;
    int order_list_len;
    size_t c;
    const char *dummy;

    access_ctx = talloc_zero(bectx, struct sdap_access_ctx);
    if(access_ctx == NULL) {
        ret = ENOMEM;
        goto done;
    }

    ret = sssm_ldap_id_init(bectx, ops, (void **)&access_ctx->id_ctx);
    if (ret != EOK) {
        DEBUG(1, ("sssm_ldap_id_init failed.\n"));
        goto done;
    }

    order = dp_opt_get_cstring(access_ctx->id_ctx->opts->basic,
                               SDAP_ACCESS_ORDER);
    if (order == NULL) {
        DEBUG(1, ("ldap_access_order not given, using 'filter'.\n"));
        order = "filter";
    }

    ret = split_on_separator(access_ctx, order, ',', true, true,
                             &order_list, &order_list_len);
    if (ret != EOK) {
        DEBUG(1, ("split_on_separator failed.\n"));
        goto done;
    }

    ret = check_order_list_for_duplicates(order_list, false);
    if (ret != EOK) {
        DEBUG(1, ("check_order_list_for_duplicates failed.\n"));
        goto done;
    }

    if (order_list_len > LDAP_ACCESS_LAST) {
        DEBUG(1, ("Currently only [%d] different access rules are supported.\n"));
        ret = EINVAL;
        goto done;
    }

    for (c = 0; order_list[c] != NULL; c++) {
        if (strcasecmp(order_list[c], LDAP_ACCESS_FILTER_NAME) == 0) {
            access_ctx->access_rule[c] = LDAP_ACCESS_FILTER;

            filter = dp_opt_get_cstring(access_ctx->id_ctx->opts->basic,
                                                    SDAP_ACCESS_FILTER);
            if (filter == NULL) {
                /* It's okay if this is NULL. In that case we will simply act
                 * like the 'deny' provider.
                 */
                DEBUG(0, ("Warning: LDAP access rule 'filter' is set, "
                          "but no ldap_access_filter configured. "
                          "All domain users will be denied access.\n"));
            }
            else {
                if (filter[0] == '(') {
                    /* This filter is wrapped in parentheses.
                     * Pass it as-is to the openldap libraries.
                     */
                    access_ctx->filter = filter;
                }
                else {
                    /* Add parentheses around the filter */
                    access_ctx->filter = talloc_asprintf(access_ctx, "(%s)", filter);
                    if (access_ctx->filter == NULL) {
                        ret = ENOMEM;
                        goto done;
                    }
                }
            }

        } else if (strcasecmp(order_list[c], LDAP_ACCESS_EXPIRE_NAME) == 0) {
            access_ctx->access_rule[c] = LDAP_ACCESS_EXPIRE;

            dummy = dp_opt_get_cstring(access_ctx->id_ctx->opts->basic,
                                       SDAP_ACCOUNT_EXPIRE_POLICY);
            if (dummy == NULL) {
                DEBUG(0, ("Warning: LDAP access rule 'expire' is set, "
                          "but no ldap_account_expire_policy configured. "
                          "All domain users will be denied access.\n"));
            } else {
                if (strcasecmp(dummy, LDAP_ACCOUNT_EXPIRE_SHADOW) != 0 &&
                    strcasecmp(dummy, LDAP_ACCOUNT_EXPIRE_AD) != 0 &&
                    strcasecmp(dummy, LDAP_ACCOUNT_EXPIRE_NDS) != 0 &&
                    strcasecmp(dummy, LDAP_ACCOUNT_EXPIRE_RHDS) != 0 &&
                    strcasecmp(dummy, LDAP_ACCOUNT_EXPIRE_IPA) != 0 &&
                    strcasecmp(dummy, LDAP_ACCOUNT_EXPIRE_389DS) != 0) {
                    DEBUG(1, ("Unsupported LDAP account expire policy [%s].\n",
                              dummy));
                    ret = EINVAL;
                    goto done;
                }
            }
        } else if (strcasecmp(order_list[c], LDAP_ACCESS_SERVICE_NAME) == 0) {
            access_ctx->access_rule[c] = LDAP_ACCESS_SERVICE;
        } else if (strcasecmp(order_list[c], LDAP_ACCESS_HOST_NAME) == 0) {
            access_ctx->access_rule[c] = LDAP_ACCESS_HOST;
        } else {
            DEBUG(1, ("Unexpected access rule name [%s].\n", order_list[c]));
            ret = EINVAL;
            goto done;
        }
    }
    access_ctx->access_rule[c] = LDAP_ACCESS_EMPTY;
    if (c == 0) {
        DEBUG(0, ("Warning: access_provider=ldap set, "
                  "but ldap_access_order is empty. "
                  "All domain users will be denied access.\n"));
    }

    *ops = &sdap_access_ops;
    *pvt_data = access_ctx;

    ret = EOK;

done:
    if (ret != EOK) {
        talloc_free(access_ctx);
    }
    return ret;
}

int sssm_ldap_sudo_init(struct be_ctx *be_ctx,
                        struct bet_ops **ops,
                        void **pvt_data)
{
#ifdef BUILD_SUDO
    struct sdap_id_ctx *id_ctx;
    void *data;
    int ret;

    ret = sssm_ldap_id_init(be_ctx, ops, &data);
    if (ret != EOK) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("Cannot init LDAP ID provider [%d]: %s\n",
                                    ret, strerror(ret)));
        return ret;
    }

    id_ctx = talloc_get_type(data, struct sdap_id_ctx);
    if (!id_ctx) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("No ID provider?\n"));
        return EIO;
    }

    return sdap_sudo_init(be_ctx, id_ctx, ops, pvt_data);
#else
    DEBUG(SSSDBG_MINOR_FAILURE, ("Sudo init handler called but SSSD is "
                                 "built without sudo support, ignoring\n"));
    return EOK;
#endif
}

int sssm_ldap_autofs_init(struct be_ctx *be_ctx,
                          struct bet_ops **ops,
                          void **pvt_data)
{
#ifdef BUILD_AUTOFS
    struct sdap_id_ctx *id_ctx;
    void *data;
    int ret;

    ret = sssm_ldap_id_init(be_ctx, ops, &data);
    if (ret != EOK) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("Cannot init LDAP ID provider [%d]: %s\n",
                                    ret, strerror(ret)));
        return ret;
    }

    id_ctx = talloc_get_type(data, struct sdap_id_ctx);
    if (!id_ctx) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("No ID provider?\n"));
        return EIO;
    }

    return sdap_autofs_init(be_ctx, id_ctx, ops, pvt_data);
#else
    DEBUG(SSSDBG_MINOR_FAILURE, ("Autofs init handler called but SSSD is "
                                 "built without autofs support, ignoring\n"));
    return EOK;
#endif
}

static void sdap_shutdown(struct be_req *req)
{
    /* TODO: Clean up any internal data */
    sdap_handler_done(req, DP_ERR_OK, EOK, NULL);
}