xref: /freebsd/crypto/heimdal/lib/hx509/keyset.c (revision c19800e8)
1 /*
2  * Copyright (c) 2004 - 2007 Kungliga Tekniska Högskolan
3  * (Royal Institute of Technology, Stockholm, Sweden).
4  * All rights reserved.
5  *
6  * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  *
19  * 3. Neither the name of the Institute nor the names of its contributors
20  *    may be used to endorse or promote products derived from this software
21  *    without specific prior written permission.
22  *
23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33  * SUCH DAMAGE.
34  */
35 
36 #include "hx_locl.h"
37 
38 /**
39  * @page page_keyset Certificate store operations
40  *
41  * Type of certificates store:
42  * - MEMORY
43  *   In memory based format. Doesnt support storing.
44  * - FILE
45  *   FILE supports raw DER certicates and PEM certicates. When PEM is
46  *   used the file can contain may certificates and match private
47  *   keys. Support storing the certificates. DER format only supports
48  *   on certificate and no private key.
49  * - PEM-FILE
50  *   Same as FILE, defaulting to PEM encoded certificates.
51  * - PEM-FILE
52  *   Same as FILE, defaulting to DER encoded certificates.
53  * - PKCS11
54  * - PKCS12
55  * - DIR
56  * - KEYCHAIN
57  *   Apple Mac OS X KeyChain backed keychain object.
58  *
59  * See the library functions here: @ref hx509_keyset
60  */
61 
62 struct hx509_certs_data {
63     unsigned int ref;
64     struct hx509_keyset_ops *ops;
65     void *ops_data;
66 };
67 
68 static struct hx509_keyset_ops *
_hx509_ks_type(hx509_context context,const char * type)69 _hx509_ks_type(hx509_context context, const char *type)
70 {
71     int i;
72 
73     for (i = 0; i < context->ks_num_ops; i++)
74 	if (strcasecmp(type, context->ks_ops[i]->name) == 0)
75 	    return context->ks_ops[i];
76 
77     return NULL;
78 }
79 
80 void
_hx509_ks_register(hx509_context context,struct hx509_keyset_ops * ops)81 _hx509_ks_register(hx509_context context, struct hx509_keyset_ops *ops)
82 {
83     struct hx509_keyset_ops **val;
84 
85     if (_hx509_ks_type(context, ops->name))
86 	return;
87 
88     val = realloc(context->ks_ops,
89 		  (context->ks_num_ops + 1) * sizeof(context->ks_ops[0]));
90     if (val == NULL)
91 	return;
92     val[context->ks_num_ops] = ops;
93     context->ks_ops = val;
94     context->ks_num_ops++;
95 }
96 
97 /**
98  * Open or creates a new hx509 certificate store.
99  *
100  * @param context A hx509 context
101  * @param name name of the store, format is TYPE:type-specific-string,
102  * if NULL is used the MEMORY store is used.
103  * @param flags list of flags:
104  * - HX509_CERTS_CREATE create a new keystore of the specific TYPE.
105  * - HX509_CERTS_UNPROTECT_ALL fails if any private key failed to be extracted.
106  * @param lock a lock that unlocks the certificates store, use NULL to
107  * select no password/certifictes/prompt lock (see @ref page_lock).
108  * @param certs return pointer, free with hx509_certs_free().
109  *
110  * @ingroup hx509_keyset
111  */
112 
113 int
hx509_certs_init(hx509_context context,const char * name,int flags,hx509_lock lock,hx509_certs * certs)114 hx509_certs_init(hx509_context context,
115 		 const char *name, int flags,
116 		 hx509_lock lock, hx509_certs *certs)
117 {
118     struct hx509_keyset_ops *ops;
119     const char *residue;
120     hx509_certs c;
121     char *type;
122     int ret;
123 
124     *certs = NULL;
125 
126     residue = strchr(name, ':');
127     if (residue) {
128 	type = malloc(residue - name + 1);
129 	if (type)
130 	    strlcpy(type, name, residue - name + 1);
131 	residue++;
132 	if (residue[0] == '\0')
133 	    residue = NULL;
134     } else {
135 	type = strdup("MEMORY");
136 	residue = name;
137     }
138     if (type == NULL) {
139 	hx509_clear_error_string(context);
140 	return ENOMEM;
141     }
142 
143     ops = _hx509_ks_type(context, type);
144     if (ops == NULL) {
145 	hx509_set_error_string(context, 0, ENOENT,
146 			       "Keyset type %s is not supported", type);
147 	free(type);
148 	return ENOENT;
149     }
150     free(type);
151     c = calloc(1, sizeof(*c));
152     if (c == NULL) {
153 	hx509_clear_error_string(context);
154 	return ENOMEM;
155     }
156     c->ops = ops;
157     c->ref = 1;
158 
159     ret = (*ops->init)(context, c, &c->ops_data, flags, residue, lock);
160     if (ret) {
161 	free(c);
162 	return ret;
163     }
164 
165     *certs = c;
166     return 0;
167 }
168 
169 /**
170  * Write the certificate store to stable storage.
171  *
172  * @param context A hx509 context.
173  * @param certs a certificate store to store.
174  * @param flags currently unused, use 0.
175  * @param lock a lock that unlocks the certificates store, use NULL to
176  * select no password/certifictes/prompt lock (see @ref page_lock).
177  *
178  * @return Returns an hx509 error code. HX509_UNSUPPORTED_OPERATION if
179  * the certificate store doesn't support the store operation.
180  *
181  * @ingroup hx509_keyset
182  */
183 
184 int
hx509_certs_store(hx509_context context,hx509_certs certs,int flags,hx509_lock lock)185 hx509_certs_store(hx509_context context,
186 		  hx509_certs certs,
187 		  int flags,
188 		  hx509_lock lock)
189 {
190     if (certs->ops->store == NULL) {
191 	hx509_set_error_string(context, 0, HX509_UNSUPPORTED_OPERATION,
192 			       "keystore if type %s doesn't support "
193 			       "store operation",
194 			       certs->ops->name);
195 	return HX509_UNSUPPORTED_OPERATION;
196     }
197 
198     return (*certs->ops->store)(context, certs, certs->ops_data, flags, lock);
199 }
200 
201 
202 hx509_certs
hx509_certs_ref(hx509_certs certs)203 hx509_certs_ref(hx509_certs certs)
204 {
205     if (certs == NULL)
206 	return NULL;
207     if (certs->ref == 0)
208 	_hx509_abort("certs refcount == 0 on ref");
209     if (certs->ref == UINT_MAX)
210 	_hx509_abort("certs refcount == UINT_MAX on ref");
211     certs->ref++;
212     return certs;
213 }
214 
215 /**
216  * Free a certificate store.
217  *
218  * @param certs certificate store to free.
219  *
220  * @ingroup hx509_keyset
221  */
222 
223 void
hx509_certs_free(hx509_certs * certs)224 hx509_certs_free(hx509_certs *certs)
225 {
226     if (*certs) {
227 	if ((*certs)->ref == 0)
228 	    _hx509_abort("cert refcount == 0 on free");
229 	if (--(*certs)->ref > 0)
230 	    return;
231 
232 	(*(*certs)->ops->free)(*certs, (*certs)->ops_data);
233 	free(*certs);
234 	*certs = NULL;
235     }
236 }
237 
238 /**
239  * Start the integration
240  *
241  * @param context a hx509 context.
242  * @param certs certificate store to iterate over
243  * @param cursor cursor that will keep track of progress, free with
244  * hx509_certs_end_seq().
245  *
246  * @return Returns an hx509 error code. HX509_UNSUPPORTED_OPERATION is
247  * returned if the certificate store doesn't support the iteration
248  * operation.
249  *
250  * @ingroup hx509_keyset
251  */
252 
253 int
hx509_certs_start_seq(hx509_context context,hx509_certs certs,hx509_cursor * cursor)254 hx509_certs_start_seq(hx509_context context,
255 		      hx509_certs certs,
256 		      hx509_cursor *cursor)
257 {
258     int ret;
259 
260     if (certs->ops->iter_start == NULL) {
261 	hx509_set_error_string(context, 0, HX509_UNSUPPORTED_OPERATION,
262 			       "Keyset type %s doesn't support iteration",
263 			       certs->ops->name);
264 	return HX509_UNSUPPORTED_OPERATION;
265     }
266 
267     ret = (*certs->ops->iter_start)(context, certs, certs->ops_data, cursor);
268     if (ret)
269 	return ret;
270 
271     return 0;
272 }
273 
274 /**
275  * Get next ceritificate from the certificate keystore pointed out by
276  * cursor.
277  *
278  * @param context a hx509 context.
279  * @param certs certificate store to iterate over.
280  * @param cursor cursor that keeps track of progress.
281  * @param cert return certificate next in store, NULL if the store
282  * contains no more certificates. Free with hx509_cert_free().
283  *
284  * @return Returns an hx509 error code.
285  *
286  * @ingroup hx509_keyset
287  */
288 
289 int
hx509_certs_next_cert(hx509_context context,hx509_certs certs,hx509_cursor cursor,hx509_cert * cert)290 hx509_certs_next_cert(hx509_context context,
291 		      hx509_certs certs,
292 		      hx509_cursor cursor,
293 		      hx509_cert *cert)
294 {
295     *cert = NULL;
296     return (*certs->ops->iter)(context, certs, certs->ops_data, cursor, cert);
297 }
298 
299 /**
300  * End the iteration over certificates.
301  *
302  * @param context a hx509 context.
303  * @param certs certificate store to iterate over.
304  * @param cursor cursor that will keep track of progress, freed.
305  *
306  * @return Returns an hx509 error code.
307  *
308  * @ingroup hx509_keyset
309  */
310 
311 int
hx509_certs_end_seq(hx509_context context,hx509_certs certs,hx509_cursor cursor)312 hx509_certs_end_seq(hx509_context context,
313 		    hx509_certs certs,
314 		    hx509_cursor cursor)
315 {
316     (*certs->ops->iter_end)(context, certs, certs->ops_data, cursor);
317     return 0;
318 }
319 
320 /**
321  * Iterate over all certificates in a keystore and call an function
322  * for each fo them.
323  *
324  * @param context a hx509 context.
325  * @param certs certificate store to iterate over.
326  * @param func function to call for each certificate. The function
327  * should return non-zero to abort the iteration, that value is passed
328  * back to the caller of hx509_certs_iter_f().
329  * @param ctx context variable that will passed to the function.
330  *
331  * @return Returns an hx509 error code.
332  *
333  * @ingroup hx509_keyset
334  */
335 
336 int
hx509_certs_iter_f(hx509_context context,hx509_certs certs,int (* func)(hx509_context,void *,hx509_cert),void * ctx)337 hx509_certs_iter_f(hx509_context context,
338 		   hx509_certs certs,
339 		   int (*func)(hx509_context, void *, hx509_cert),
340 		   void *ctx)
341 {
342     hx509_cursor cursor;
343     hx509_cert c;
344     int ret;
345 
346     ret = hx509_certs_start_seq(context, certs, &cursor);
347     if (ret)
348 	return ret;
349 
350     while (1) {
351 	ret = hx509_certs_next_cert(context, certs, cursor, &c);
352 	if (ret)
353 	    break;
354 	if (c == NULL) {
355 	    ret = 0;
356 	    break;
357 	}
358 	ret = (*func)(context, ctx, c);
359 	hx509_cert_free(c);
360 	if (ret)
361 	    break;
362     }
363 
364     hx509_certs_end_seq(context, certs, cursor);
365 
366     return ret;
367 }
368 
369 /**
370  * Iterate over all certificates in a keystore and call an function
371  * for each fo them.
372  *
373  * @param context a hx509 context.
374  * @param certs certificate store to iterate over.
375  * @param func function to call for each certificate. The function
376  * should return non-zero to abort the iteration, that value is passed
377  * back to the caller of hx509_certs_iter().
378  *
379  * @return Returns an hx509 error code.
380  *
381  * @ingroup hx509_keyset
382  */
383 
384 #ifdef __BLOCKS__
385 
386 static int
certs_iter(hx509_context context,void * ctx,hx509_cert cert)387 certs_iter(hx509_context context, void *ctx, hx509_cert cert)
388 {
389     int (^func)(hx509_cert) = ctx;
390     return func(cert);
391 }
392 
393 /**
394  * Iterate over all certificates in a keystore and call an block
395  * for each fo them.
396  *
397  * @param context a hx509 context.
398  * @param certs certificate store to iterate over.
399  * @param func block to call for each certificate. The function
400  * should return non-zero to abort the iteration, that value is passed
401  * back to the caller of hx509_certs_iter().
402  *
403  * @return Returns an hx509 error code.
404  *
405  * @ingroup hx509_keyset
406  */
407 
408 int
409 hx509_certs_iter(hx509_context context,
410 		 hx509_certs certs,
411 		 int (^func)(hx509_cert))
412 {
413     return hx509_certs_iter_f(context, certs, certs_iter, func);
414 }
415 #endif
416 
417 
418 /**
419  * Function to use to hx509_certs_iter_f() as a function argument, the
420  * ctx variable to hx509_certs_iter_f() should be a FILE file descriptor.
421  *
422  * @param context a hx509 context.
423  * @param ctx used by hx509_certs_iter_f().
424  * @param c a certificate
425  *
426  * @return Returns an hx509 error code.
427  *
428  * @ingroup hx509_keyset
429  */
430 
431 int
hx509_ci_print_names(hx509_context context,void * ctx,hx509_cert c)432 hx509_ci_print_names(hx509_context context, void *ctx, hx509_cert c)
433 {
434     Certificate *cert;
435     hx509_name n;
436     char *s, *i;
437 
438     cert = _hx509_get_cert(c);
439 
440     _hx509_name_from_Name(&cert->tbsCertificate.subject, &n);
441     hx509_name_to_string(n, &s);
442     hx509_name_free(&n);
443     _hx509_name_from_Name(&cert->tbsCertificate.issuer, &n);
444     hx509_name_to_string(n, &i);
445     hx509_name_free(&n);
446     fprintf(ctx, "subject: %s\nissuer: %s\n", s, i);
447     free(s);
448     free(i);
449     return 0;
450 }
451 
452 /**
453  * Add a certificate to the certificiate store.
454  *
455  * The receiving keyset certs will either increase reference counter
456  * of the cert or make a deep copy, either way, the caller needs to
457  * free the cert itself.
458  *
459  * @param context a hx509 context.
460  * @param certs certificate store to add the certificate to.
461  * @param cert certificate to add.
462  *
463  * @return Returns an hx509 error code.
464  *
465  * @ingroup hx509_keyset
466  */
467 
468 int
hx509_certs_add(hx509_context context,hx509_certs certs,hx509_cert cert)469 hx509_certs_add(hx509_context context, hx509_certs certs, hx509_cert cert)
470 {
471     if (certs->ops->add == NULL) {
472 	hx509_set_error_string(context, 0, ENOENT,
473 			       "Keyset type %s doesn't support add operation",
474 			       certs->ops->name);
475 	return ENOENT;
476     }
477 
478     return (*certs->ops->add)(context, certs, certs->ops_data, cert);
479 }
480 
481 /**
482  * Find a certificate matching the query.
483  *
484  * @param context a hx509 context.
485  * @param certs certificate store to search.
486  * @param q query allocated with @ref hx509_query functions.
487  * @param r return certificate (or NULL on error), should be freed
488  * with hx509_cert_free().
489  *
490  * @return Returns an hx509 error code.
491  *
492  * @ingroup hx509_keyset
493  */
494 
495 int
hx509_certs_find(hx509_context context,hx509_certs certs,const hx509_query * q,hx509_cert * r)496 hx509_certs_find(hx509_context context,
497 		 hx509_certs certs,
498 		 const hx509_query *q,
499 		 hx509_cert *r)
500 {
501     hx509_cursor cursor;
502     hx509_cert c;
503     int ret;
504 
505     *r = NULL;
506 
507     _hx509_query_statistic(context, 0, q);
508 
509     if (certs->ops->query)
510 	return (*certs->ops->query)(context, certs, certs->ops_data, q, r);
511 
512     ret = hx509_certs_start_seq(context, certs, &cursor);
513     if (ret)
514 	return ret;
515 
516     c = NULL;
517     while (1) {
518 	ret = hx509_certs_next_cert(context, certs, cursor, &c);
519 	if (ret)
520 	    break;
521 	if (c == NULL)
522 	    break;
523 	if (_hx509_query_match_cert(context, q, c)) {
524 	    *r = c;
525 	    break;
526 	}
527 	hx509_cert_free(c);
528     }
529 
530     hx509_certs_end_seq(context, certs, cursor);
531     if (ret)
532 	return ret;
533     /**
534      * Return HX509_CERT_NOT_FOUND if no certificate in certs matched
535      * the query.
536      */
537     if (c == NULL) {
538 	hx509_clear_error_string(context);
539 	return HX509_CERT_NOT_FOUND;
540     }
541 
542     return 0;
543 }
544 
545 /**
546  * Filter certificate matching the query.
547  *
548  * @param context a hx509 context.
549  * @param certs certificate store to search.
550  * @param q query allocated with @ref hx509_query functions.
551  * @param result the filtered certificate store, caller must free with
552  *        hx509_certs_free().
553  *
554  * @return Returns an hx509 error code.
555  *
556  * @ingroup hx509_keyset
557  */
558 
559 int
hx509_certs_filter(hx509_context context,hx509_certs certs,const hx509_query * q,hx509_certs * result)560 hx509_certs_filter(hx509_context context,
561 		   hx509_certs certs,
562 		   const hx509_query *q,
563 		   hx509_certs *result)
564 {
565     hx509_cursor cursor;
566     hx509_cert c;
567     int ret, found = 0;
568 
569     _hx509_query_statistic(context, 0, q);
570 
571     ret = hx509_certs_init(context, "MEMORY:filter-certs", 0,
572 			   NULL, result);
573     if (ret)
574 	return ret;
575 
576     ret = hx509_certs_start_seq(context, certs, &cursor);
577     if (ret) {
578 	hx509_certs_free(result);
579 	return ret;
580     }
581 
582     c = NULL;
583     while (1) {
584 	ret = hx509_certs_next_cert(context, certs, cursor, &c);
585 	if (ret)
586 	    break;
587 	if (c == NULL)
588 	    break;
589 	if (_hx509_query_match_cert(context, q, c)) {
590 	    hx509_certs_add(context, *result, c);
591 	    found = 1;
592 	}
593 	hx509_cert_free(c);
594     }
595 
596     hx509_certs_end_seq(context, certs, cursor);
597     if (ret) {
598 	hx509_certs_free(result);
599 	return ret;
600     }
601 
602     /**
603      * Return HX509_CERT_NOT_FOUND if no certificate in certs matched
604      * the query.
605      */
606     if (!found) {
607 	hx509_certs_free(result);
608 	hx509_clear_error_string(context);
609 	return HX509_CERT_NOT_FOUND;
610     }
611 
612     return 0;
613 }
614 
615 
616 static int
certs_merge_func(hx509_context context,void * ctx,hx509_cert c)617 certs_merge_func(hx509_context context, void *ctx, hx509_cert c)
618 {
619     return hx509_certs_add(context, (hx509_certs)ctx, c);
620 }
621 
622 /**
623  * Merge a certificate store into another. The from store is keep
624  * intact.
625  *
626  * @param context a hx509 context.
627  * @param to the store to merge into.
628  * @param from the store to copy the object from.
629  *
630  * @return Returns an hx509 error code.
631  *
632  * @ingroup hx509_keyset
633  */
634 
635 int
hx509_certs_merge(hx509_context context,hx509_certs to,hx509_certs from)636 hx509_certs_merge(hx509_context context, hx509_certs to, hx509_certs from)
637 {
638     if (from == NULL)
639 	return 0;
640     return hx509_certs_iter_f(context, from, certs_merge_func, to);
641 }
642 
643 /**
644  * Same a hx509_certs_merge() but use a lock and name to describe the
645  * from source.
646  *
647  * @param context a hx509 context.
648  * @param to the store to merge into.
649  * @param lock a lock that unlocks the certificates store, use NULL to
650  * select no password/certifictes/prompt lock (see @ref page_lock).
651  * @param name name of the source store
652  *
653  * @return Returns an hx509 error code.
654  *
655  * @ingroup hx509_keyset
656  */
657 
658 int
hx509_certs_append(hx509_context context,hx509_certs to,hx509_lock lock,const char * name)659 hx509_certs_append(hx509_context context,
660 		   hx509_certs to,
661 		   hx509_lock lock,
662 		   const char *name)
663 {
664     hx509_certs s;
665     int ret;
666 
667     ret = hx509_certs_init(context, name, 0, lock, &s);
668     if (ret)
669 	return ret;
670     ret = hx509_certs_merge(context, to, s);
671     hx509_certs_free(&s);
672     return ret;
673 }
674 
675 /**
676  * Get one random certificate from the certificate store.
677  *
678  * @param context a hx509 context.
679  * @param certs a certificate store to get the certificate from.
680  * @param c return certificate, should be freed with hx509_cert_free().
681  *
682  * @return Returns an hx509 error code.
683  *
684  * @ingroup hx509_keyset
685  */
686 
687 int
hx509_get_one_cert(hx509_context context,hx509_certs certs,hx509_cert * c)688 hx509_get_one_cert(hx509_context context, hx509_certs certs, hx509_cert *c)
689 {
690     hx509_cursor cursor;
691     int ret;
692 
693     *c = NULL;
694 
695     ret = hx509_certs_start_seq(context, certs, &cursor);
696     if (ret)
697 	return ret;
698 
699     ret = hx509_certs_next_cert(context, certs, cursor, c);
700     if (ret)
701 	return ret;
702 
703     hx509_certs_end_seq(context, certs, cursor);
704     return 0;
705 }
706 
707 static int
certs_info_stdio(void * ctx,const char * str)708 certs_info_stdio(void *ctx, const char *str)
709 {
710     FILE *f = ctx;
711     fprintf(f, "%s\n", str);
712     return 0;
713 }
714 
715 /**
716  * Print some info about the certificate store.
717  *
718  * @param context a hx509 context.
719  * @param certs certificate store to print information about.
720  * @param func function that will get each line of the information, if
721  * NULL is used the data is printed on a FILE descriptor that should
722  * be passed in ctx, if ctx also is NULL, stdout is used.
723  * @param ctx parameter to func.
724  *
725  * @return Returns an hx509 error code.
726  *
727  * @ingroup hx509_keyset
728  */
729 
730 int
hx509_certs_info(hx509_context context,hx509_certs certs,int (* func)(void *,const char *),void * ctx)731 hx509_certs_info(hx509_context context,
732 		 hx509_certs certs,
733 		 int (*func)(void *, const char *),
734 		 void *ctx)
735 {
736     if (func == NULL) {
737 	func = certs_info_stdio;
738 	if (ctx == NULL)
739 	    ctx = stdout;
740     }
741     if (certs->ops->printinfo == NULL) {
742 	(*func)(ctx, "No info function for certs");
743 	return 0;
744     }
745     return (*certs->ops->printinfo)(context, certs, certs->ops_data,
746 				    func, ctx);
747 }
748 
749 void
_hx509_pi_printf(int (* func)(void *,const char *),void * ctx,const char * fmt,...)750 _hx509_pi_printf(int (*func)(void *, const char *), void *ctx,
751 		 const char *fmt, ...)
752 {
753     va_list ap;
754     char *str;
755 
756     va_start(ap, fmt);
757     vasprintf(&str, fmt, ap);
758     va_end(ap);
759     if (str == NULL)
760 	return;
761     (*func)(ctx, str);
762     free(str);
763 }
764 
765 int
_hx509_certs_keys_get(hx509_context context,hx509_certs certs,hx509_private_key ** keys)766 _hx509_certs_keys_get(hx509_context context,
767 		      hx509_certs certs,
768 		      hx509_private_key **keys)
769 {
770     if (certs->ops->getkeys == NULL) {
771 	*keys = NULL;
772 	return 0;
773     }
774     return (*certs->ops->getkeys)(context, certs, certs->ops_data, keys);
775 }
776 
777 int
_hx509_certs_keys_add(hx509_context context,hx509_certs certs,hx509_private_key key)778 _hx509_certs_keys_add(hx509_context context,
779 		      hx509_certs certs,
780 		      hx509_private_key key)
781 {
782     if (certs->ops->addkey == NULL) {
783 	hx509_set_error_string(context, 0, EINVAL,
784 			       "keystore if type %s doesn't support "
785 			       "key add operation",
786 			       certs->ops->name);
787 	return EINVAL;
788     }
789     return (*certs->ops->addkey)(context, certs, certs->ops_data, key);
790 }
791 
792 
793 void
_hx509_certs_keys_free(hx509_context context,hx509_private_key * keys)794 _hx509_certs_keys_free(hx509_context context,
795 		       hx509_private_key *keys)
796 {
797     int i;
798     for (i = 0; keys[i]; i++)
799 	hx509_private_key_free(&keys[i]);
800     free(keys);
801 }
802