summaryrefslogtreecommitdiff
path: root/server/confdb/confdb.c
blob: 743ce27789ca7309b4dca1b16182572d17fbe3b5 (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
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
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
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
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
669
670
671
672
673
674
/*
   SSSD

   NSS Configuratoin DB

   Copyright (C) Simo Sorce <ssorce@redhat.com>	2008

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#define _GNU_SOURCE
#include "config.h"
#include <string.h>
#include <errno.h>
#include "ldb.h"
#include "ldb_errors.h"
#include "util/util.h"
#include "confdb/confdb.h"
#define CONFDB_VERSION "0.1"
#define CONFDB_DOMAIN_BASEDN "cn=domains,cn=config"
#define CONFDB_DOMAIN_ATTR "cn"

#define CONFDB_ZERO_CHECK_OR_JUMP(var, ret, err, label) do { \
    if (!var) { \
        ret = err; \
        goto label; \
    } \
} while(0)

struct confdb_ctx {
    struct ldb_context *ldb;
};

static char *prepend_cn(char *str, int *slen, const char *comp, int clen)
{
    char *ret;

    ret = talloc_realloc(NULL, str, char, *slen + 4 + clen + 1);
    if (!ret)
        return NULL;

    /* move current string to the end */
    memmove(&ret[clen +4], ret, *slen+1); /* includes termination */
    memcpy(ret, "cn=", 3);
    memcpy(&ret[3], comp, clen);
    ret[clen+3] = ',';

    *slen = *slen + 4 + clen;

    return ret;
}

static int parse_section(TALLOC_CTX *mem_ctx, const char *section,
                         char **sec_dn, const char **rdn_name)
{
    TALLOC_CTX *tmp_ctx;
    char *dn;
    char *p;
    const char *s;
    int l, ret;

    /* section must be a non null string and must not start with '/' */
    if (!section || !*section || *section == '/') return EINVAL;

    tmp_ctx = talloc_new(mem_ctx);
    if (!tmp_ctx) return ENOMEM;

    s = section;
    l = 0;
    while ((p = strchrnul(s, '/'))) {
        if (l == 0) {
            dn = talloc_asprintf(tmp_ctx, "cn=%s", s);
            l = 3 + (p-s);
            dn[l] = '\0';
        } else {
            dn = prepend_cn(dn, &l, s, p-s);
        }
        if (!dn) {
            ret = ENOMEM;
            goto done;
        }
        if (*p == '\0') {
            if (rdn_name) *rdn_name = s;
            break; /* reached end */
        }
        s = p+1;
        if (*s == '\0') { /* a section cannot end in '.' */
            ret = EINVAL;
            goto done;
        }
    }

    *sec_dn = talloc_steal(mem_ctx, dn);
    ret = EOK;

done:
    talloc_free(tmp_ctx);
    return ret;
}

int confdb_add_param(struct confdb_ctx *cdb,
                     bool replace,
                     const char *section,
                     const char *attribute,
                     const char **values)
{
    TALLOC_CTX *tmp_ctx;
    struct ldb_message *msg;
    struct ldb_result *res;
    struct ldb_dn *dn;
    char *secdn;
    const char *rdn_name;
    int ret, i;

    tmp_ctx = talloc_new(NULL);
    if (!tmp_ctx)
        return ENOMEM;

    ret = parse_section(tmp_ctx, section, &secdn, &rdn_name);
    if (ret != EOK) {
        goto done;
    }

    dn = ldb_dn_new(tmp_ctx, cdb->ldb, secdn);
    CONFDB_ZERO_CHECK_OR_JUMP(dn, ret, EIO, done);

    ret = ldb_search(cdb->ldb, tmp_ctx, &res,
                     dn, LDB_SCOPE_BASE, NULL, NULL);
    if (ret != LDB_SUCCESS) {
        ret = EIO;
        goto done;
    }

    msg = ldb_msg_new(tmp_ctx);
    CONFDB_ZERO_CHECK_OR_JUMP(msg, ret, ENOMEM, done);

    msg->dn = talloc_steal(msg, dn);
    CONFDB_ZERO_CHECK_OR_JUMP(msg->dn, ret, ENOMEM, done);

    if (res->count == 0) { /* add a new message */
        errno = 0;

        /* cn first */
        ret = ldb_msg_add_string(msg, "cn", rdn_name);
        if (ret != LDB_SUCCESS) {
            if (errno) ret = errno;
            else ret = EIO;
            goto done;
        }

        /* now the requested attribute */
        for (i = 0; values[i]; i++) {
            ret = ldb_msg_add_string(msg, attribute, values[i]);
            if (ret != LDB_SUCCESS) {
                if (errno) ret = errno;
                else ret = EIO;
                goto done;
            }
        }

        ret = ldb_add(cdb->ldb, msg);
        if (ret != LDB_SUCCESS) {
            ret = EIO;
            goto done;
        }

    } else {
        int optype;
        errno = 0;

        /* mark this as a replacement */
        if (replace) optype = LDB_FLAG_MOD_REPLACE;
        else optype = LDB_FLAG_MOD_ADD;
        ret = ldb_msg_add_empty(msg, attribute, optype, NULL);
        if (ret != LDB_SUCCESS) {
            if (errno) ret = errno;
            else ret = EIO;
            goto done;
        }

        /* now the requested attribute */
        for (i = 0; values[i]; i++) {
            ret = ldb_msg_add_string(msg, attribute, values[i]);
            if (ret != LDB_SUCCESS) {
                if (errno) ret = errno;
                else ret = EIO;
                goto done;
            }
        }

        ret = ldb_modify(cdb->ldb, msg);
        if (ret != LDB_SUCCESS) {
            ret = EIO;
            goto done;
        }
    }

    ret = EOK;

done:
    talloc_free(tmp_ctx);
    return ret;
}

int confdb_get_param(struct confdb_ctx *cdb,
                     TALLOC_CTX *mem_ctx,
                     const char *section,
                     const char *attribute,
                     char ***values)
{
    TALLOC_CTX *tmp_ctx;
    struct ldb_result *res;
    struct ldb_dn *dn;
    char *secdn;
    const char *attrs[] = { attribute, NULL };
    char **vals;
    struct ldb_message_element *el;
    int ret, i;

    tmp_ctx = talloc_new(mem_ctx);
    if (!tmp_ctx)
        return ENOMEM;

    ret = parse_section(tmp_ctx, section, &secdn, NULL);
    if (ret != EOK) {
        goto done;
    }

    dn = ldb_dn_new(tmp_ctx, cdb->ldb, secdn);
    if (!dn) {
        ret = EIO;
        goto done;
    }

    ret = ldb_search(cdb->ldb, tmp_ctx, &res,
                     dn, LDB_SCOPE_BASE, attrs, NULL);
    if (ret != LDB_SUCCESS) {
        ret = EIO;
        goto done;
    }
    if (res->count > 1) {
        ret = EIO;
        goto done;
    }

    vals = talloc_zero(mem_ctx, char *);
    ret = EOK;

    if (res->count > 0) {
        el = ldb_msg_find_element(res->msgs[0], attribute);
        if (el && el->num_values > 0) {
            vals = talloc_realloc(mem_ctx, vals, char *, el->num_values +1);
            if (!vals) {
                ret = ENOMEM;
                goto done;
            }
            /* should always be strings so this should be safe */
            for (i = 0; i < el->num_values; i++) {
                struct ldb_val v = el->values[i];
                vals[i] = talloc_strndup(vals, (char *)v.data, v.length);
                if (!vals[i]) {
                    ret = ENOMEM;
                    goto done;
                }
            }
            vals[i] = NULL;
        }
    }

    *values = vals;

done:
    talloc_free(tmp_ctx);
    return ret;
}

int confdb_get_string(struct confdb_ctx *cdb, TALLOC_CTX *ctx,
                      const char *section, const char *attribute,
                      const char *defstr, char **result)
{
    char **values;
    char *restr;
    int ret;

    ret = confdb_get_param(cdb, ctx, section, attribute, &values);
    if (ret != EOK) {
        return ret;
    }

    if (values[0]) {
        if (values[1] != NULL) {
            /* too many values */
            talloc_free(values);
            return EINVAL;
        }
        restr = talloc_steal(ctx, values[0]);
    } else {
        /* Did not return a value, so use the default */

        if (defstr == NULL) { /* No default given */
            *result = NULL;
            talloc_free(values);
            return EOK;
        }

        /* Copy the default string */
        restr = talloc_strdup(ctx, defstr);
    }
    if (!restr) {
        talloc_free(values);
        DEBUG(0, ("Out of memory\n"));
        return ENOMEM;
    }

    talloc_free(values);

    *result = restr;
    return EOK;
}

int confdb_get_int(struct confdb_ctx *cdb, TALLOC_CTX *ctx,
                   const char *section, const char *attribute,
                   int defval, int *result)
{
    char **values;
    long int val;
    int ret;

    ret = confdb_get_param(cdb, ctx, section, attribute, &values);
    if (ret != EOK) {
        return ret;
    }

    if (values[0]) {
        if (values[1] != NULL) {
            /* too many values */
            talloc_free(values);
            return EINVAL;
        }

        errno = 0;
        val = strtol(values[0], NULL, 0);
        if (errno) {
            talloc_free(values);
            return errno;
        }

        if (val < INT_MIN || val > INT_MAX) {
            talloc_free(values);
            return ERANGE;
        }

    } else {
        val = defval;
    }

    talloc_free(values);

    *result = (int)val;
    return EOK;
}

int confdb_get_bool(struct confdb_ctx *cdb, TALLOC_CTX *ctx,
                    const char *section, const char *attribute,
                    bool defval, bool *result)
{
    char **values;
    bool val;
    int ret;

    ret = confdb_get_param(cdb, ctx, section, attribute, &values);
    if (ret != EOK) {
        return ret;
    }

    if (values[0]) {
        if (values[1] != NULL) {
            /* too many values */
            talloc_free(values);
            return EINVAL;
        }

        if (strcasecmp(values[0], "FALSE") == 0) {
            val = false;

        } else if (strcasecmp(values[0], "TRUE") == 0) {
            val = true;

        } else {

            DEBUG(2, ("Value is not a boolean!\n"));
            return EINVAL;
        }

    } else {
        val = defval;
    }

    talloc_free(values);

    *result = val;
    return EOK;
}

static int confdb_test(struct confdb_ctx *cdb)
{
    char **values;
    int ret;

    ret = confdb_get_param(cdb, cdb,
                           "config",
                           "version",
                           &values);
    if (ret != EOK) {
        return ret;
    }

    if (values[0] == NULL) {
        /* empty database, will need to init */
        talloc_free(values);
        return ENOENT;
    }

    if (values[1] != NULL) {
        /* more than 1 value ?? */
        talloc_free(values);
        return EIO;
    }

    if (strcmp(values[0], CONFDB_VERSION) != 0) {
        /* bad version get out */
        talloc_free(values);
        return EIO;
    }

    talloc_free(values);
    return EOK;
}

static int confdb_init_db(struct confdb_ctx *cdb)
{
    const char *val[2];
    int ret;
    TALLOC_CTX *tmp_ctx;

    tmp_ctx = talloc_new(cdb);
    if(tmp_ctx == NULL) return ENOMEM;

    val[0] = CONFDB_VERSION;
    val[1] = NULL;

    /* Add the confdb version */
    ret = confdb_add_param(cdb,
                           false,
                           "config",
                           "version",
                            val);
    if (ret != EOK) goto done;

    /* Set up default monitored services */
    val[0] = "Local service configuration";
    ret = confdb_add_param(cdb, false, "config/services", "description", val);
    if (ret != EOK) goto done;

#if 0 /* Not yet implemented */
/* PAM */
#endif /* PAM */

/* NSS */
    /* set the sssd_nss description */
    val[0] = "NSS Responder Configuration";
    ret = confdb_add_param(cdb, false, "config/services/nss", "description", val);
    if (ret != EOK) goto done;

    /* Set the sssd_nss command path */
    val[0] = talloc_asprintf(tmp_ctx, "%s/sssd_nss", SSSD_LIBEXEC_PATH);
    ret = confdb_add_param(cdb, false, "config/services/nss", "command", val);
    if (ret != EOK) goto done;

    /* Set the sssd_nss socket path */
    val[0] = talloc_asprintf(tmp_ctx, "%s/sssd_nss", PIPE_PATH);
    ret = confdb_add_param(cdb, false, "config/services/nss", "unixSocket", val);
    if (ret != EOK) goto done;

    /* Add NSS to the list of active services */
    val[0] = "nss";
    ret = confdb_add_param(cdb, false, "config/services", "activeServices", val);
    if (ret != EOK) goto done;

/* Data Provider */
    /* Set the sssd_dp description */
    val[0] = "Data Provider Configuration";
    ret = confdb_add_param(cdb, false, "config/services/dp", "description", val);
    if (ret != EOK) goto done;

    /* Set the sssd_dp command path */
    val[0] = talloc_asprintf(tmp_ctx, "%s/sssd_dp", SSSD_LIBEXEC_PATH);
    ret = confdb_add_param(cdb, false, "config/services/dp", "command", val);
    if (ret != EOK) goto done;

    /* Add the Data Provider to the list of active services */
    val[0] = "dp";
    ret = confdb_add_param(cdb, false, "config/services", "activeServices", val);
    if (ret != EOK) goto done;

/* InfoPipe */
#ifdef HAVE_INFOPIPE
    /* Set the sssd_info description */
    val[0] = "InfoPipe Configuration";
    ret = confdb_add_param(cdb, false, "config/services/infp", "description", val);
    if (ret != EOK) goto done;

    /* Set the sssd_info command path */
    val[0] = talloc_asprintf(tmp_ctx, "%s/sssd_info", SSSD_LIBEXEC_PATH);
    ret = confdb_add_param(cdb, false, "config/services/infp", "command", val);
    if (ret != EOK) goto done;

    /* Add the InfoPipe to the list of active services */
    val[0] = "infp";
    ret = confdb_add_param(cdb, false, "config/services", "activeServices", val);
    if (ret != EOK) goto done;
#endif

/* PolicyKit */
#ifdef HAVE_POLICYKIT
    /* Set the sssd_pk description */
    val[0] = "PolicyKit Backend Configuration";
    ret = confdb_add_param(cdb, false, "config/services/spk", "description", val);
    if (ret != EOK) goto done;

    /* Set the sssd_info command path */
    val[0] = talloc_asprintf(tmp_ctx, "%s/sssd_pk", SSSD_LIBEXEC_PATH);
    ret = confdb_add_param(cdb, false, "config/services/spk", "command", val);
    if (ret != EOK) goto done;

    /* Add the InfoPipe to the list of active services */
    val[0] = "spk";
    ret = confdb_add_param(cdb, false, "config/services", "activeServices", val);
    if (ret != EOK) goto done;
#endif

/* Domains */
    val[0] = "Domains served by SSSD";
    ret = confdb_add_param(cdb, false, "config/domains", "description", val);
    if (ret != EOK) goto done;

    /* Default LOCAL domain */
    val[0] = "Reserved domain for local configurations";
    ret = confdb_add_param(cdb, false, "config/domains/LOCAL", "description", val);
    if (ret != EOK) goto done;

done:
    talloc_free(tmp_ctx);
    return ret;
}

int confdb_init(TALLOC_CTX *mem_ctx,
                struct event_context *ev,
                struct confdb_ctx **cdb_ctx,
                char *confdb_location)
{
    struct confdb_ctx *cdb;
    int ret;

    cdb = talloc_zero(mem_ctx, struct confdb_ctx);
    if (!cdb)
        return ENOMEM;

    cdb->ldb = ldb_init(cdb, ev);
    if (!cdb->ldb) {
        talloc_free(cdb);
        return EIO;
    }

    ret = ldb_connect(cdb->ldb, confdb_location, 0, NULL);
    if (ret != LDB_SUCCESS) {
        talloc_free(cdb);
        return EIO;
    }

    ret = confdb_test(cdb);
    if (ret == ENOENT) {
        ret = confdb_init_db(cdb);
    }
    if (ret != EOK) {
        talloc_free(cdb);
        return ret;
    }

    *cdb_ctx = cdb;

    return EOK;
}

int confdb_get_domains(struct confdb_ctx *cdb,
                       TALLOC_CTX *mem_ctx,
                       char ***values)
{
    TALLOC_CTX *tmp_ctx;
    struct ldb_dn *dn;
    struct ldb_result *res;
    struct ldb_message_element *el;
    int ret, i;
    const char *attrs[] = {CONFDB_DOMAIN_ATTR, NULL};
    char **vals;
    int val_count;

    tmp_ctx = talloc_new(mem_ctx);

    dn = ldb_dn_new(tmp_ctx,cdb->ldb, CONFDB_DOMAIN_BASEDN);
    if (!dn) {
        ret = EIO;
        goto done;
    }

    ret = ldb_search(cdb->ldb, tmp_ctx, &res, dn,
                     LDB_SCOPE_ONELEVEL, attrs, NULL);
    if (ret != LDB_SUCCESS) {
        ret = EIO;
        goto done;
    }

    val_count = 1;
    vals = talloc(mem_ctx, char *);
    if (!vals) {
        ret = ENOMEM;
        goto done;
    }

    i = 0;
    while (i < res->count) {
        el = ldb_msg_find_element(res->msgs[i], CONFDB_DOMAIN_ATTR);
        if (el && el->num_values > 0) {
            if (el->num_values > 1) {
                DEBUG(0, ("Error, domains should not have multivalued cn\n"));
                ret = EINVAL;
                goto done;
            }
            val_count++;
            vals = talloc_realloc(mem_ctx, vals, char *, val_count);
            if (!vals) {
                DEBUG(0, ("realloc failed\n"));
                ret = ENOMEM;
                goto done;
            }
            /* should always be strings so this should be safe */
            struct ldb_val v = el->values[0];
            vals[i] = talloc_strndup(vals, (char *)v.data, v.length);
            if (!vals[i]) {
                ret = ENOMEM;
                goto done;
            }
        }
        i++;
    }
    vals[i] = NULL;

    *values = vals;

done:
    talloc_free(tmp_ctx);
    return ret;
}