summaryrefslogtreecommitdiff
path: root/source4/heimdal/lib/hx509/keyset.c
blob: bb36221affdf3cc1c5e420bea564c129254413e5 (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
675
676
677
/*
 * Copyright (c) 2004 - 2007 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden). 
 * All rights reserved. 
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 *
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in the 
 *    documentation and/or other materials provided with the distribution. 
 *
 * 3. Neither the name of the Institute nor the names of its contributors 
 *    may be used to endorse or promote products derived from this software 
 *    without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE. 
 */

#include "hx_locl.h"
RCSID("$Id$");

/**
 * @page page_keyset Certificate store operations
 *
 * Type of certificates store:
 * - MEMORY
 *   In memory based format. Doesnt support storing.
 * - FILE 
 *   FILE supports raw DER certicates and PEM certicates. When PEM is
 *   used the file can contain may certificates and match private
 *   keys. Support storing the certificates. DER format only supports
 *   on certificate and no private key.
 * - PEM-FILE
 *   Same as FILE, defaulting to PEM encoded certificates.
 * - PEM-FILE
 *   Same as FILE, defaulting to DER encoded certificates.
 * - PKCS11
 * - PKCS12
 * - DIR
 * - KEYCHAIN
 *   Apple Mac OS X KeyChain backed keychain object.
 *
 * See the library functions here: @ref hx509_keyset
 */

struct hx509_certs_data {
    unsigned int ref;
    struct hx509_keyset_ops *ops;
    void *ops_data;
};

static struct hx509_keyset_ops *
_hx509_ks_type(hx509_context context, const char *type)
{
    int i;

    for (i = 0; i < context->ks_num_ops; i++)
	if (strcasecmp(type, context->ks_ops[i]->name) == 0)
	    return context->ks_ops[i];

    return NULL;
}

void
_hx509_ks_register(hx509_context context, struct hx509_keyset_ops *ops)
{
    struct hx509_keyset_ops **val;

    if (_hx509_ks_type(context, ops->name))
	return;

    val = realloc(context->ks_ops, 
		  (context->ks_num_ops + 1) * sizeof(context->ks_ops[0]));
    if (val == NULL)
	return;
    val[context->ks_num_ops] = ops;
    context->ks_ops = val;
    context->ks_num_ops++;
}

/**
 * Open or creates a new hx509 certificate store.
 *
 * @param context A hx509 context
 * @param name name of the store, format is TYPE:type-specific-string,
 * if NULL is used the MEMORY store is used.
 * @param flags list of flags:
 * - HX509_CERTS_CREATE create a new keystore of the specific TYPE.
 * - HX509_CERTS_UNPROTECT_ALL fails if any private key failed to be extracted.
 * @param lock a lock that unlocks the certificates store, use NULL to
 * select no password/certifictes/prompt lock (see @ref page_lock).
 * @param certs return pointer, free with hx509_certs_free().
 *
 * @ingroup hx509_keyset
 */

int
hx509_certs_init(hx509_context context,
		 const char *name, int flags,
		 hx509_lock lock, hx509_certs *certs)
{
    struct hx509_keyset_ops *ops;
    const char *residue;
    hx509_certs c;
    char *type;
    int ret;

    *certs = NULL;

    residue = strchr(name, ':');
    if (residue) {
	type = malloc(residue - name + 1);
	if (type)
	    strlcpy(type, name, residue - name + 1);
	residue++;
	if (residue[0] == '\0')
	    residue = NULL;
    } else {
	type = strdup("MEMORY");
	residue = name;
    }
    if (type == NULL) {
	hx509_clear_error_string(context);
	return ENOMEM;
    }
    
    ops = _hx509_ks_type(context, type);
    if (ops == NULL) {
	hx509_set_error_string(context, 0, ENOENT, 
			       "Keyset type %s is not supported", type);
	free(type);
	return ENOENT;
    }
    free(type);
    c = calloc(1, sizeof(*c));
    if (c == NULL) {
	hx509_clear_error_string(context);
	return ENOMEM;
    }
    c->ops = ops;
    c->ref = 1;

    ret = (*ops->init)(context, c, &c->ops_data, flags, residue, lock);
    if (ret) {
	free(c);
	return ret;
    }

    *certs = c;
    return 0;
}

/**
 * Write the certificate store to stable storage.
 *
 * @param context A hx509 context.
 * @param certs a certificate store to store.
 * @param flags currently unused, use 0.
 * @param lock a lock that unlocks the certificates store, use NULL to
 * select no password/certifictes/prompt lock (see @ref page_lock).
 *
 * @return Returns an hx509 error code. HX509_UNSUPPORTED_OPERATION if
 * the certificate store doesn't support the store operation.
 *
 * @ingroup hx509_keyset
 */

int
hx509_certs_store(hx509_context context,
		  hx509_certs certs,
		  int flags,
		  hx509_lock lock)
{
    if (certs->ops->store == NULL) {
	hx509_set_error_string(context, 0, HX509_UNSUPPORTED_OPERATION,
			       "keystore if type %s doesn't support "
			       "store operation",
			       certs->ops->name);
	return HX509_UNSUPPORTED_OPERATION;
    }

    return (*certs->ops->store)(context, certs, certs->ops_data, flags, lock);
}


hx509_certs
_hx509_certs_ref(hx509_certs certs)
{
    if (certs == NULL)
	return NULL;
    if (certs->ref == 0)
	_hx509_abort("certs refcount == 0 on ref");
    if (certs->ref == UINT_MAX)
	_hx509_abort("certs refcount == UINT_MAX on ref");
    certs->ref++;
    return certs;
}

/**
 * Free a certificate store.
 *
 * @param certs certificate store to free.
 *
 * @ingroup hx509_keyset
 */

void
hx509_certs_free(hx509_certs *certs)
{
    if (*certs) {
	if ((*certs)->ref == 0)
	    _hx509_abort("cert refcount == 0 on free");
	if (--(*certs)->ref > 0)
	    return;

	(*(*certs)->ops->free)(*certs, (*certs)->ops_data);
	free(*certs);
	*certs = NULL;
    }
}

/**
 * Start the integration
 *
 * @param context a hx509 context.
 * @param certs certificate store to iterate over
 * @param cursor cursor that will keep track of progress, free with
 * hx509_certs_end_seq().
 *
 * @return Returns an hx509 error code. HX509_UNSUPPORTED_OPERATION is
 * returned if the certificate store doesn't support the iteration
 * operation.
 *
 * @ingroup hx509_keyset
 */

int
hx509_certs_start_seq(hx509_context context,
		      hx509_certs certs,
		      hx509_cursor *cursor)
{
    int ret;

    if (certs->ops->iter_start == NULL) {
	hx509_set_error_string(context, 0, HX509_UNSUPPORTED_OPERATION, 
			       "Keyset type %s doesn't support iteration", 
			       certs->ops->name);
	return HX509_UNSUPPORTED_OPERATION;
    }

    ret = (*certs->ops->iter_start)(context, certs, certs->ops_data, cursor);
    if (ret)
	return ret;

    return 0;
}

/**
 * Get next ceritificate from the certificate keystore pointed out by
 * cursor.
 *
 * @param context a hx509 context.
 * @param certs certificate store to iterate over.
 * @param cursor cursor that keeps track of progress.
 * @param cert return certificate next in store, NULL if the store
 * contains no more certificates. Free with hx509_cert_free().
 *
 * @return Returns an hx509 error code.
 *
 * @ingroup hx509_keyset
 */

int
hx509_certs_next_cert(hx509_context context,
		      hx509_certs certs,
		      hx509_cursor cursor,
		      hx509_cert *cert)
{
    *cert = NULL;
    return (*certs->ops->iter)(context, certs, certs->ops_data, cursor, cert);
}

/**
 * End the iteration over certificates.
 *
 * @param context a hx509 context.
 * @param certs certificate store to iterate over.
 * @param cursor cursor that will keep track of progress, freed.
 *
 * @return Returns an hx509 error code.
 *
 * @ingroup hx509_keyset
 */

int
hx509_certs_end_seq(hx509_context context,
		    hx509_certs certs,
		    hx509_cursor cursor)
{
    (*certs->ops->iter_end)(context, certs, certs->ops_data, cursor);
    return 0;
}

/**
 * Iterate over all certificates in a keystore and call an function
 * for each fo them.
 *
 * @param context a hx509 context.
 * @param certs certificate store to iterate over.
 * @param func function to call for each certificate. The function
 * should return non-zero to abort the iteration, that value is passed
 * back to te caller of hx509_certs_iter().
 * @param ctx context variable that will passed to the function.
 *
 * @return Returns an hx509 error code.
 *
 * @ingroup hx509_keyset
 */

int
hx509_certs_iter(hx509_context context, 
		 hx509_certs certs, 
		 int (*func)(hx509_context, void *, hx509_cert),
		 void *ctx)
{
    hx509_cursor cursor;
    hx509_cert c;
    int ret;

    ret = hx509_certs_start_seq(context, certs, &cursor);
    if (ret)
	return ret;
    
    while (1) {
	ret = hx509_certs_next_cert(context, certs, cursor, &c);
	if (ret)
	    break;
	if (c == NULL) {
	    ret = 0;
	    break;
	}
	ret = (*func)(context, ctx, c);
	hx509_cert_free(c);
	if (ret)
	    break;
    }

    hx509_certs_end_seq(context, certs, cursor);

    return ret;
}


/**
 * Function to use to hx509_certs_iter() as a function argument, the
 * ctx variable to hx509_certs_iter() should be a FILE file descriptor.
 *
 * @param context a hx509 context.
 * @param ctx used by hx509_certs_iter().
 * @param c a certificate
 *
 * @return Returns an hx509 error code.
 *
 * @ingroup hx509_keyset
 */

int
hx509_ci_print_names(hx509_context context, void *ctx, hx509_cert c)
{
    Certificate *cert;
    hx509_name n;
    char *s, *i;

    cert = _hx509_get_cert(c);

    _hx509_name_from_Name(&cert->tbsCertificate.subject, &n);
    hx509_name_to_string(n, &s);
    hx509_name_free(&n);
    _hx509_name_from_Name(&cert->tbsCertificate.issuer, &n);
    hx509_name_to_string(n, &i);
    hx509_name_free(&n);
    fprintf(ctx, "subject: %s\nissuer: %s\n", s, i);
    free(s);
    free(i);
    return 0;
}

/**
 * Add a certificate to the certificiate store.
 *
 * The receiving keyset certs will either increase reference counter
 * of the cert or make a deep copy, either way, the caller needs to
 * free the cert itself.
 *
 * @param context a hx509 context.
 * @param certs certificate store to add the certificate to.
 * @param cert certificate to add.
 *
 * @return Returns an hx509 error code.
 *
 * @ingroup hx509_keyset
 */

int
hx509_certs_add(hx509_context context, hx509_certs certs, hx509_cert cert)
{
    if (certs->ops->add == NULL) {
	hx509_set_error_string(context, 0, ENOENT, 
			       "Keyset type %s doesn't support add operation", 
			       certs->ops->name);
	return ENOENT;
    }

    return (*certs->ops->add)(context, certs, certs->ops_data, cert);
}

/**
 * Find a certificate matching the query.
 *
 * @param context a hx509 context.
 * @param certs certificate store to search.
 * @param q query allocated with @ref hx509_query functions.
 * @param r return certificate (or NULL on error), should be freed
 * with hx509_cert_free().
 *
 * @return Returns an hx509 error code.
 *
 * @ingroup hx509_keyset
 */

int
hx509_certs_find(hx509_context context,
		 hx509_certs certs, 
		 const hx509_query *q,
		 hx509_cert *r)
{
    hx509_cursor cursor;
    hx509_cert c;
    int ret;

    *r = NULL;

    _hx509_query_statistic(context, 0, q);

    if (certs->ops->query)
	return (*certs->ops->query)(context, certs, certs->ops_data, q, r);

    ret = hx509_certs_start_seq(context, certs, &cursor);
    if (ret)
	return ret;

    c = NULL;
    while (1) {
	ret = hx509_certs_next_cert(context, certs, cursor, &c);
	if (ret)
	    break;
	if (c == NULL)
	    break;
	if (_hx509_query_match_cert(context, q, c)) {
	    *r = c;
	    break;
	}
	hx509_cert_free(c);
    }

    hx509_certs_end_seq(context, certs, cursor);
    if (ret)
	return ret;
    if (c == NULL) {
	hx509_clear_error_string(context);
	return HX509_CERT_NOT_FOUND;
    }

    return 0;
}

static int
certs_merge_func(hx509_context context, void *ctx, hx509_cert c)
{
    return hx509_certs_add(context, (hx509_certs)ctx, c);
}

/**
 * Merge a certificate store into another. The from store is keep
 * intact.
 *
 * @param context a hx509 context.
 * @param to the store to merge into.
 * @param from the store to copy the object from.
 *
 * @return Returns an hx509 error code.
 *
 * @ingroup hx509_keyset
 */

int
hx509_certs_merge(hx509_context context, hx509_certs to, hx509_certs from)
{
    if (from == NULL)
	return 0;
    return hx509_certs_iter(context, from, certs_merge_func, to);
}

/**
 * Same a hx509_certs_merge() but use a lock and name to describe the
 * from source.
 *
 * @param context a hx509 context.
 * @param to the store to merge into.
 * @param lock a lock that unlocks the certificates store, use NULL to
 * select no password/certifictes/prompt lock (see @ref page_lock).
 * @param name name of the source store
 *
 * @return Returns an hx509 error code.
 *
 * @ingroup hx509_keyset
 */

int
hx509_certs_append(hx509_context context,
		   hx509_certs to,
		   hx509_lock lock,
		   const char *name)
{
    hx509_certs s;
    int ret;

    ret = hx509_certs_init(context, name, 0, lock, &s);
    if (ret)
	return ret;
    ret = hx509_certs_merge(context, to, s);
    hx509_certs_free(&s);
    return ret;
}

/**
 * Get one random certificate from the certificate store.
 *
 * @param context a hx509 context.
 * @param certs a certificate store to get the certificate from.
 * @param c return certificate, should be freed with hx509_cert_free().
 *
 * @return Returns an hx509 error code.
 *
 * @ingroup hx509_keyset
 */

int
hx509_get_one_cert(hx509_context context, hx509_certs certs, hx509_cert *c)
{
    hx509_cursor cursor;
    int ret;

    *c = NULL;

    ret = hx509_certs_start_seq(context, certs, &cursor);
    if (ret)
	return ret;

    ret = hx509_certs_next_cert(context, certs, cursor, c);
    if (ret)
	return ret;

    hx509_certs_end_seq(context, certs, cursor);
    return 0;
}

static int
certs_info_stdio(void *ctx, const char *str)
{
    FILE *f = ctx;
    fprintf(f, "%s\n", str);
    return 0;
}

/**
 * Print some info about the certificate store.
 *
 * @param context a hx509 context.
 * @param certs certificate store to print information about.
 * @param func function that will get each line of the information, if
 * NULL is used the data is printed on a FILE descriptor that should
 * be passed in ctx, if ctx also is NULL, stdout is used.
 * @param ctx parameter to func.
 *
 * @return Returns an hx509 error code.
 *
 * @ingroup hx509_keyset
 */

int
hx509_certs_info(hx509_context context, 
		 hx509_certs certs,
		 int (*func)(void *, const char *),
		 void *ctx)
{
    if (func == NULL) {
	func = certs_info_stdio;
	if (ctx == NULL)
	    ctx = stdout;
    }
    if (certs->ops->printinfo == NULL) {
	(*func)(ctx, "No info function for certs");
	return 0;
    }
    return (*certs->ops->printinfo)(context, certs, certs->ops_data,
				    func, ctx);
}

void
_hx509_pi_printf(int (*func)(void *, const char *), void *ctx,
		 const char *fmt, ...)
{
    va_list ap;
    char *str;

    va_start(ap, fmt);
    vasprintf(&str, fmt, ap);
    va_end(ap);
    if (str == NULL)
	return;
    (*func)(ctx, str);
    free(str);
}

int
_hx509_certs_keys_get(hx509_context context, 
		      hx509_certs certs, 
		      hx509_private_key **keys)
{
    if (certs->ops->getkeys == NULL) {
	*keys = NULL;
	return 0;
    }
    return (*certs->ops->getkeys)(context, certs, certs->ops_data, keys);
}

int
_hx509_certs_keys_add(hx509_context context, 
		      hx509_certs certs, 
		      hx509_private_key key)
{
    if (certs->ops->addkey == NULL) {
	hx509_set_error_string(context, 0, EINVAL,
			       "keystore if type %s doesn't support "
			       "key add operation",
			       certs->ops->name);
	return EINVAL;
    }
    return (*certs->ops->addkey)(context, certs, certs->ops_data, key);
}


void
_hx509_certs_keys_free(hx509_context context,
		       hx509_private_key *keys)
{
    int i;
    for (i = 0; keys[i]; i++)
	_hx509_private_key_free(&keys[i]);
    free(keys);
}