xref: /freebsd/crypto/openssl/crypto/encode_decode/encoder_meth.c (revision e7be843b4a162e68651d3911f0357ed464915629)
1 /*
2  * Copyright 2019-2025 The OpenSSL Project Authors. All Rights Reserved.
3  *
4  * Licensed under the Apache License 2.0 (the "License").  You may not use
5  * this file except in compliance with the License.  You can obtain a copy
6  * in the file LICENSE in the source distribution or at
7  * https://www.openssl.org/source/license.html
8  */
9 
10 #include <openssl/core.h>
11 #include <openssl/core_dispatch.h>
12 #include <openssl/encoder.h>
13 #include <openssl/ui.h>
14 #include "internal/core.h"
15 #include "internal/namemap.h"
16 #include "internal/property.h"
17 #include "internal/provider.h"
18 #include "crypto/encoder.h"
19 #include "encoder_local.h"
20 #include "crypto/context.h"
21 
22 /*
23  * Encoder can have multiple names, separated with colons in a name string
24  */
25 #define NAME_SEPARATOR ':'
26 
ossl_encoder_free(void * data)27 static void ossl_encoder_free(void *data)
28 {
29     OSSL_ENCODER_free(data);
30 }
31 
ossl_encoder_up_ref(void * data)32 static int ossl_encoder_up_ref(void *data)
33 {
34     return OSSL_ENCODER_up_ref(data);
35 }
36 
37 /* Simple method structure constructor and destructor */
ossl_encoder_new(void)38 static OSSL_ENCODER *ossl_encoder_new(void)
39 {
40     OSSL_ENCODER *encoder = NULL;
41 
42     if ((encoder = OPENSSL_zalloc(sizeof(*encoder))) == NULL)
43         return NULL;
44     if (!CRYPTO_NEW_REF(&encoder->base.refcnt, 1)) {
45         OSSL_ENCODER_free(encoder);
46         return NULL;
47     }
48 
49     return encoder;
50 }
51 
OSSL_ENCODER_up_ref(OSSL_ENCODER * encoder)52 int OSSL_ENCODER_up_ref(OSSL_ENCODER *encoder)
53 {
54     int ref = 0;
55 
56     CRYPTO_UP_REF(&encoder->base.refcnt, &ref);
57     return 1;
58 }
59 
OSSL_ENCODER_free(OSSL_ENCODER * encoder)60 void OSSL_ENCODER_free(OSSL_ENCODER *encoder)
61 {
62     int ref = 0;
63 
64     if (encoder == NULL)
65         return;
66 
67     CRYPTO_DOWN_REF(&encoder->base.refcnt, &ref);
68     if (ref > 0)
69         return;
70     OPENSSL_free(encoder->base.name);
71     ossl_property_free(encoder->base.parsed_propdef);
72     ossl_provider_free(encoder->base.prov);
73     CRYPTO_FREE_REF(&encoder->base.refcnt);
74     OPENSSL_free(encoder);
75 }
76 
77 /* Data to be passed through ossl_method_construct() */
78 struct encoder_data_st {
79     OSSL_LIB_CTX *libctx;
80     int id;                      /* For get_encoder_from_store() */
81     const char *names;           /* For get_encoder_from_store() */
82     const char *propquery;       /* For get_encoder_from_store() */
83 
84     OSSL_METHOD_STORE *tmp_store; /* For get_tmp_encoder_store() */
85 
86     unsigned int flag_construct_error_occurred : 1;
87 };
88 
89 /*
90  * Generic routines to fetch / create ENCODER methods with
91  * ossl_method_construct()
92  */
93 
94 /* Temporary encoder method store, constructor and destructor */
get_tmp_encoder_store(void * data)95 static void *get_tmp_encoder_store(void *data)
96 {
97     struct encoder_data_st *methdata = data;
98 
99     if (methdata->tmp_store == NULL)
100         methdata->tmp_store = ossl_method_store_new(methdata->libctx);
101     return methdata->tmp_store;
102 }
103 
dealloc_tmp_encoder_store(void * store)104 static void dealloc_tmp_encoder_store(void *store)
105 {
106     if (store != NULL)
107         ossl_method_store_free(store);
108 }
109 
110 /* Get the permanent encoder store */
get_encoder_store(OSSL_LIB_CTX * libctx)111 static OSSL_METHOD_STORE *get_encoder_store(OSSL_LIB_CTX *libctx)
112 {
113     return ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_ENCODER_STORE_INDEX);
114 }
115 
reserve_encoder_store(void * store,void * data)116 static int reserve_encoder_store(void *store, void *data)
117 {
118     struct encoder_data_st *methdata = data;
119 
120     if (store == NULL
121         && (store = get_encoder_store(methdata->libctx)) == NULL)
122         return 0;
123 
124     return ossl_method_lock_store(store);
125 }
126 
unreserve_encoder_store(void * store,void * data)127 static int unreserve_encoder_store(void *store, void *data)
128 {
129     struct encoder_data_st *methdata = data;
130 
131     if (store == NULL
132         && (store = get_encoder_store(methdata->libctx)) == NULL)
133         return 0;
134 
135     return ossl_method_unlock_store(store);
136 }
137 
138 /* Get encoder methods from a store, or put one in */
get_encoder_from_store(void * store,const OSSL_PROVIDER ** prov,void * data)139 static void *get_encoder_from_store(void *store, const OSSL_PROVIDER **prov,
140                                     void *data)
141 {
142     struct encoder_data_st *methdata = data;
143     void *method = NULL;
144     int id;
145 
146     /*
147      * get_encoder_from_store() is only called to try and get the method
148      * that OSSL_ENCODER_fetch() is asking for, and the name or name id are
149      * passed via methdata.
150      */
151     if ((id = methdata->id) == 0 && methdata->names != NULL) {
152         OSSL_NAMEMAP *namemap = ossl_namemap_stored(methdata->libctx);
153         const char *names = methdata->names;
154         const char *q = strchr(names, NAME_SEPARATOR);
155         size_t l = (q == NULL ? strlen(names) : (size_t)(q - names));
156 
157         if (namemap == 0)
158             return NULL;
159         id = ossl_namemap_name2num_n(namemap, methdata->names, l);
160     }
161 
162     if (id == 0)
163         return NULL;
164 
165     if (store == NULL
166         && (store = get_encoder_store(methdata->libctx)) == NULL)
167         return NULL;
168 
169     if (!ossl_method_store_fetch(store, id, methdata->propquery, prov, &method))
170         return NULL;
171     return method;
172 }
173 
put_encoder_in_store(void * store,void * method,const OSSL_PROVIDER * prov,const char * names,const char * propdef,void * data)174 static int put_encoder_in_store(void *store, void *method,
175                                 const OSSL_PROVIDER *prov,
176                                 const char *names, const char *propdef,
177                                 void *data)
178 {
179     struct encoder_data_st *methdata = data;
180     OSSL_NAMEMAP *namemap;
181     int id;
182     size_t l = 0;
183 
184     /*
185      * put_encoder_in_store() is only called with an OSSL_ENCODER method that
186      * was successfully created by construct_encoder() below, which means that
187      * all the names should already be stored in the namemap with the same
188      * numeric identity, so just use the first to get that identity.
189      */
190     if (names != NULL) {
191         const char *q = strchr(names, NAME_SEPARATOR);
192 
193         l = (q == NULL ? strlen(names) : (size_t)(q - names));
194     }
195 
196     if ((namemap = ossl_namemap_stored(methdata->libctx)) == NULL
197         || (id = ossl_namemap_name2num_n(namemap, names, l)) == 0)
198         return 0;
199 
200     if (store == NULL && (store = get_encoder_store(methdata->libctx)) == NULL)
201         return 0;
202 
203     return ossl_method_store_add(store, prov, id, propdef, method,
204                                  ossl_encoder_up_ref,
205                                  ossl_encoder_free);
206 }
207 
208 /* Create and populate a encoder method */
encoder_from_algorithm(int id,const OSSL_ALGORITHM * algodef,OSSL_PROVIDER * prov)209 static void *encoder_from_algorithm(int id, const OSSL_ALGORITHM *algodef,
210                                     OSSL_PROVIDER *prov)
211 {
212     OSSL_ENCODER *encoder = NULL;
213     const OSSL_DISPATCH *fns = algodef->implementation;
214     OSSL_LIB_CTX *libctx = ossl_provider_libctx(prov);
215 
216     if ((encoder = ossl_encoder_new()) == NULL)
217         return NULL;
218     encoder->base.id = id;
219     if ((encoder->base.name = ossl_algorithm_get1_first_name(algodef)) == NULL) {
220         OSSL_ENCODER_free(encoder);
221         return NULL;
222     }
223     encoder->base.algodef = algodef;
224     if ((encoder->base.parsed_propdef
225          = ossl_parse_property(libctx, algodef->property_definition)) == NULL) {
226         OSSL_ENCODER_free(encoder);
227         return NULL;
228     }
229 
230     for (; fns->function_id != 0; fns++) {
231         switch (fns->function_id) {
232         case OSSL_FUNC_ENCODER_NEWCTX:
233             if (encoder->newctx == NULL)
234                 encoder->newctx =
235                     OSSL_FUNC_encoder_newctx(fns);
236             break;
237         case OSSL_FUNC_ENCODER_FREECTX:
238             if (encoder->freectx == NULL)
239                 encoder->freectx =
240                     OSSL_FUNC_encoder_freectx(fns);
241             break;
242         case OSSL_FUNC_ENCODER_GET_PARAMS:
243             if (encoder->get_params == NULL)
244                 encoder->get_params =
245                     OSSL_FUNC_encoder_get_params(fns);
246             break;
247         case OSSL_FUNC_ENCODER_GETTABLE_PARAMS:
248             if (encoder->gettable_params == NULL)
249                 encoder->gettable_params =
250                     OSSL_FUNC_encoder_gettable_params(fns);
251             break;
252         case OSSL_FUNC_ENCODER_SET_CTX_PARAMS:
253             if (encoder->set_ctx_params == NULL)
254                 encoder->set_ctx_params =
255                     OSSL_FUNC_encoder_set_ctx_params(fns);
256             break;
257         case OSSL_FUNC_ENCODER_SETTABLE_CTX_PARAMS:
258             if (encoder->settable_ctx_params == NULL)
259                 encoder->settable_ctx_params =
260                     OSSL_FUNC_encoder_settable_ctx_params(fns);
261             break;
262         case OSSL_FUNC_ENCODER_DOES_SELECTION:
263             if (encoder->does_selection == NULL)
264                 encoder->does_selection =
265                     OSSL_FUNC_encoder_does_selection(fns);
266             break;
267         case OSSL_FUNC_ENCODER_ENCODE:
268             if (encoder->encode == NULL)
269                 encoder->encode = OSSL_FUNC_encoder_encode(fns);
270             break;
271         case OSSL_FUNC_ENCODER_IMPORT_OBJECT:
272             if (encoder->import_object == NULL)
273                 encoder->import_object =
274                     OSSL_FUNC_encoder_import_object(fns);
275             break;
276         case OSSL_FUNC_ENCODER_FREE_OBJECT:
277             if (encoder->free_object == NULL)
278                 encoder->free_object =
279                     OSSL_FUNC_encoder_free_object(fns);
280             break;
281         }
282     }
283     /*
284      * Try to check that the method is sensible.
285      * If you have a constructor, you must have a destructor and vice versa.
286      * You must have the encoding driver functions.
287      */
288     if (!((encoder->newctx == NULL && encoder->freectx == NULL)
289           || (encoder->newctx != NULL && encoder->freectx != NULL)
290           || (encoder->import_object != NULL && encoder->free_object != NULL)
291           || (encoder->import_object == NULL && encoder->free_object == NULL))
292         || encoder->encode == NULL) {
293         OSSL_ENCODER_free(encoder);
294         ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_INVALID_PROVIDER_FUNCTIONS);
295         return NULL;
296     }
297 
298     if (prov != NULL && !ossl_provider_up_ref(prov)) {
299         OSSL_ENCODER_free(encoder);
300         return NULL;
301     }
302 
303     encoder->base.prov = prov;
304     return encoder;
305 }
306 
307 
308 /*
309  * The core fetching functionality passes the names of the implementation.
310  * This function is responsible to getting an identity number for them,
311  * then call encoder_from_algorithm() with that identity number.
312  */
construct_encoder(const OSSL_ALGORITHM * algodef,OSSL_PROVIDER * prov,void * data)313 static void *construct_encoder(const OSSL_ALGORITHM *algodef,
314                                OSSL_PROVIDER *prov, void *data)
315 {
316     /*
317      * This function is only called if get_encoder_from_store() returned
318      * NULL, so it's safe to say that of all the spots to create a new
319      * namemap entry, this is it.  Should the name already exist there, we
320      * know that ossl_namemap_add() will return its corresponding number.
321      */
322     struct encoder_data_st *methdata = data;
323     OSSL_LIB_CTX *libctx = ossl_provider_libctx(prov);
324     OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
325     const char *names = algodef->algorithm_names;
326     int id = ossl_namemap_add_names(namemap, 0, names, NAME_SEPARATOR);
327     void *method = NULL;
328 
329     if (id != 0)
330         method = encoder_from_algorithm(id, algodef, prov);
331 
332     /*
333      * Flag to indicate that there was actual construction errors.  This
334      * helps inner_evp_generic_fetch() determine what error it should
335      * record on inaccessible algorithms.
336      */
337     if (method == NULL)
338         methdata->flag_construct_error_occurred = 1;
339 
340     return method;
341 }
342 
343 /* Intermediary function to avoid ugly casts, used below */
destruct_encoder(void * method,void * data)344 static void destruct_encoder(void *method, void *data)
345 {
346     OSSL_ENCODER_free(method);
347 }
348 
up_ref_encoder(void * method)349 static int up_ref_encoder(void *method)
350 {
351     return OSSL_ENCODER_up_ref(method);
352 }
353 
free_encoder(void * method)354 static void free_encoder(void *method)
355 {
356     OSSL_ENCODER_free(method);
357 }
358 
359 /* Fetching support.  Can fetch by numeric identity or by name */
360 static OSSL_ENCODER *
inner_ossl_encoder_fetch(struct encoder_data_st * methdata,const char * name,const char * properties)361 inner_ossl_encoder_fetch(struct encoder_data_st *methdata,
362                          const char *name, const char *properties)
363 {
364     OSSL_METHOD_STORE *store = get_encoder_store(methdata->libctx);
365     OSSL_NAMEMAP *namemap = ossl_namemap_stored(methdata->libctx);
366     const char *const propq = properties != NULL ? properties : "";
367     void *method = NULL;
368     int unsupported, id;
369 
370     if (store == NULL || namemap == NULL) {
371         ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_INVALID_ARGUMENT);
372         return NULL;
373     }
374 
375     id = name != NULL ? ossl_namemap_name2num(namemap, name) : 0;
376 
377     /*
378      * If we haven't found the name yet, chances are that the algorithm to
379      * be fetched is unsupported.
380      */
381     unsupported = id == 0;
382 
383     if (id == 0
384         || !ossl_method_store_cache_get(store, NULL, id, propq, &method)) {
385         OSSL_METHOD_CONSTRUCT_METHOD mcm = {
386             get_tmp_encoder_store,
387             reserve_encoder_store,
388             unreserve_encoder_store,
389             get_encoder_from_store,
390             put_encoder_in_store,
391             construct_encoder,
392             destruct_encoder
393         };
394         OSSL_PROVIDER *prov = NULL;
395 
396         methdata->id = id;
397         methdata->names = name;
398         methdata->propquery = propq;
399         methdata->flag_construct_error_occurred = 0;
400         if ((method = ossl_method_construct(methdata->libctx, OSSL_OP_ENCODER,
401                                             &prov, 0 /* !force_cache */,
402                                             &mcm, methdata)) != NULL) {
403             /*
404              * If construction did create a method for us, we know that
405              * there is a correct name_id and meth_id, since those have
406              * already been calculated in get_encoder_from_store() and
407              * put_encoder_in_store() above.
408              */
409             if (id == 0)
410                 id = ossl_namemap_name2num(namemap, name);
411             ossl_method_store_cache_set(store, prov, id, propq, method,
412                                         up_ref_encoder, free_encoder);
413         }
414 
415         /*
416          * If we never were in the constructor, the algorithm to be fetched
417          * is unsupported.
418          */
419         unsupported = !methdata->flag_construct_error_occurred;
420     }
421 
422     if ((id != 0 || name != NULL) && method == NULL) {
423         int code = unsupported ? ERR_R_UNSUPPORTED : ERR_R_FETCH_FAILED;
424 
425         if (name == NULL)
426             name = ossl_namemap_num2name(namemap, id, 0);
427         ERR_raise_data(ERR_LIB_OSSL_ENCODER, code,
428                        "%s, Name (%s : %d), Properties (%s)",
429                        ossl_lib_ctx_get_descriptor(methdata->libctx),
430                        name == NULL ? "<null>" : name, id,
431                        properties == NULL ? "<null>" : properties);
432     }
433 
434     return method;
435 }
436 
OSSL_ENCODER_fetch(OSSL_LIB_CTX * libctx,const char * name,const char * properties)437 OSSL_ENCODER *OSSL_ENCODER_fetch(OSSL_LIB_CTX *libctx, const char *name,
438                                  const char *properties)
439 {
440     struct encoder_data_st methdata;
441     void *method;
442 
443     methdata.libctx = libctx;
444     methdata.tmp_store = NULL;
445     method = inner_ossl_encoder_fetch(&methdata, name, properties);
446     dealloc_tmp_encoder_store(methdata.tmp_store);
447     return method;
448 }
449 
ossl_encoder_store_cache_flush(OSSL_LIB_CTX * libctx)450 int ossl_encoder_store_cache_flush(OSSL_LIB_CTX *libctx)
451 {
452     OSSL_METHOD_STORE *store = get_encoder_store(libctx);
453 
454     if (store != NULL)
455         return ossl_method_store_cache_flush_all(store);
456     return 1;
457 }
458 
ossl_encoder_store_remove_all_provided(const OSSL_PROVIDER * prov)459 int ossl_encoder_store_remove_all_provided(const OSSL_PROVIDER *prov)
460 {
461     OSSL_LIB_CTX *libctx = ossl_provider_libctx(prov);
462     OSSL_METHOD_STORE *store = get_encoder_store(libctx);
463 
464     if (store != NULL)
465         return ossl_method_store_remove_all_provided(store, prov);
466     return 1;
467 }
468 
469 /*
470  * Library of basic method functions
471  */
472 
OSSL_ENCODER_get0_provider(const OSSL_ENCODER * encoder)473 const OSSL_PROVIDER *OSSL_ENCODER_get0_provider(const OSSL_ENCODER *encoder)
474 {
475     if (!ossl_assert(encoder != NULL)) {
476         ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
477         return 0;
478     }
479 
480     return encoder->base.prov;
481 }
482 
OSSL_ENCODER_get0_properties(const OSSL_ENCODER * encoder)483 const char *OSSL_ENCODER_get0_properties(const OSSL_ENCODER *encoder)
484 {
485     if (!ossl_assert(encoder != NULL)) {
486         ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
487         return 0;
488     }
489 
490     return encoder->base.algodef->property_definition;
491 }
492 
493 const OSSL_PROPERTY_LIST *
ossl_encoder_parsed_properties(const OSSL_ENCODER * encoder)494 ossl_encoder_parsed_properties(const OSSL_ENCODER *encoder)
495 {
496     if (!ossl_assert(encoder != NULL)) {
497         ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
498         return 0;
499     }
500 
501     return encoder->base.parsed_propdef;
502 }
503 
ossl_encoder_get_number(const OSSL_ENCODER * encoder)504 int ossl_encoder_get_number(const OSSL_ENCODER *encoder)
505 {
506     if (!ossl_assert(encoder != NULL)) {
507         ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
508         return 0;
509     }
510 
511     return encoder->base.id;
512 }
513 
OSSL_ENCODER_get0_name(const OSSL_ENCODER * encoder)514 const char *OSSL_ENCODER_get0_name(const OSSL_ENCODER *encoder)
515 {
516     return encoder->base.name;
517 }
518 
OSSL_ENCODER_get0_description(const OSSL_ENCODER * encoder)519 const char *OSSL_ENCODER_get0_description(const OSSL_ENCODER *encoder)
520 {
521     return encoder->base.algodef->algorithm_description;
522 }
523 
OSSL_ENCODER_is_a(const OSSL_ENCODER * encoder,const char * name)524 int OSSL_ENCODER_is_a(const OSSL_ENCODER *encoder, const char *name)
525 {
526     if (encoder->base.prov != NULL) {
527         OSSL_LIB_CTX *libctx = ossl_provider_libctx(encoder->base.prov);
528         OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
529 
530         return ossl_namemap_name2num(namemap, name) == encoder->base.id;
531     }
532     return 0;
533 }
534 
535 struct do_one_data_st {
536     void (*user_fn)(OSSL_ENCODER *encoder, void *arg);
537     void *user_arg;
538 };
539 
do_one(ossl_unused int id,void * method,void * arg)540 static void do_one(ossl_unused int id, void *method, void *arg)
541 {
542     struct do_one_data_st *data = arg;
543 
544     data->user_fn(method, data->user_arg);
545 }
546 
OSSL_ENCODER_do_all_provided(OSSL_LIB_CTX * libctx,void (* user_fn)(OSSL_ENCODER * encoder,void * arg),void * user_arg)547 void OSSL_ENCODER_do_all_provided(OSSL_LIB_CTX *libctx,
548                                   void (*user_fn)(OSSL_ENCODER *encoder,
549                                                   void *arg),
550                                   void *user_arg)
551 {
552     struct encoder_data_st methdata;
553     struct do_one_data_st data;
554 
555     methdata.libctx = libctx;
556     methdata.tmp_store = NULL;
557     (void)inner_ossl_encoder_fetch(&methdata, NULL, NULL /* properties */);
558 
559     data.user_fn = user_fn;
560     data.user_arg = user_arg;
561     if (methdata.tmp_store != NULL)
562         ossl_method_store_do_all(methdata.tmp_store, &do_one, &data);
563     ossl_method_store_do_all(get_encoder_store(libctx), &do_one, &data);
564     dealloc_tmp_encoder_store(methdata.tmp_store);
565 }
566 
OSSL_ENCODER_names_do_all(const OSSL_ENCODER * encoder,void (* fn)(const char * name,void * data),void * data)567 int OSSL_ENCODER_names_do_all(const OSSL_ENCODER *encoder,
568                               void (*fn)(const char *name, void *data),
569                               void *data)
570 {
571     if (encoder == NULL)
572         return 0;
573 
574     if (encoder->base.prov != NULL) {
575         OSSL_LIB_CTX *libctx = ossl_provider_libctx(encoder->base.prov);
576         OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
577 
578         return ossl_namemap_doall_names(namemap, encoder->base.id, fn, data);
579     }
580 
581     return 1;
582 }
583 
584 const OSSL_PARAM *
OSSL_ENCODER_gettable_params(OSSL_ENCODER * encoder)585 OSSL_ENCODER_gettable_params(OSSL_ENCODER *encoder)
586 {
587     if (encoder != NULL && encoder->gettable_params != NULL) {
588         void *provctx = ossl_provider_ctx(OSSL_ENCODER_get0_provider(encoder));
589 
590         return encoder->gettable_params(provctx);
591     }
592     return NULL;
593 }
594 
OSSL_ENCODER_get_params(OSSL_ENCODER * encoder,OSSL_PARAM params[])595 int OSSL_ENCODER_get_params(OSSL_ENCODER *encoder, OSSL_PARAM params[])
596 {
597     if (encoder != NULL && encoder->get_params != NULL)
598         return encoder->get_params(params);
599     return 0;
600 }
601 
OSSL_ENCODER_settable_ctx_params(OSSL_ENCODER * encoder)602 const OSSL_PARAM *OSSL_ENCODER_settable_ctx_params(OSSL_ENCODER *encoder)
603 {
604     if (encoder != NULL && encoder->settable_ctx_params != NULL) {
605         void *provctx = ossl_provider_ctx(OSSL_ENCODER_get0_provider(encoder));
606 
607         return encoder->settable_ctx_params(provctx);
608     }
609     return NULL;
610 }
611 
612 /*
613  * Encoder context support
614  */
615 
OSSL_ENCODER_CTX_new(void)616 OSSL_ENCODER_CTX *OSSL_ENCODER_CTX_new(void)
617 {
618     OSSL_ENCODER_CTX *ctx;
619 
620     ctx = OPENSSL_zalloc(sizeof(*ctx));
621     return ctx;
622 }
623 
OSSL_ENCODER_CTX_set_params(OSSL_ENCODER_CTX * ctx,const OSSL_PARAM params[])624 int OSSL_ENCODER_CTX_set_params(OSSL_ENCODER_CTX *ctx,
625                                 const OSSL_PARAM params[])
626 {
627     int ok = 1;
628     size_t i;
629     size_t l;
630 
631     if (!ossl_assert(ctx != NULL)) {
632         ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
633         return 0;
634     }
635 
636     if (ctx->encoder_insts == NULL)
637         return 1;
638 
639     l = OSSL_ENCODER_CTX_get_num_encoders(ctx);
640     for (i = 0; i < l; i++) {
641         OSSL_ENCODER_INSTANCE *encoder_inst =
642             sk_OSSL_ENCODER_INSTANCE_value(ctx->encoder_insts, i);
643         OSSL_ENCODER *encoder = OSSL_ENCODER_INSTANCE_get_encoder(encoder_inst);
644         void *encoderctx = OSSL_ENCODER_INSTANCE_get_encoder_ctx(encoder_inst);
645 
646         if (encoderctx == NULL || encoder->set_ctx_params == NULL)
647             continue;
648         if (!encoder->set_ctx_params(encoderctx, params))
649             ok = 0;
650     }
651     return ok;
652 }
653 
OSSL_ENCODER_CTX_free(OSSL_ENCODER_CTX * ctx)654 void OSSL_ENCODER_CTX_free(OSSL_ENCODER_CTX *ctx)
655 {
656     if (ctx != NULL) {
657         sk_OSSL_ENCODER_INSTANCE_pop_free(ctx->encoder_insts,
658                                           ossl_encoder_instance_free);
659         OPENSSL_free(ctx->construct_data);
660         ossl_pw_clear_passphrase_data(&ctx->pwdata);
661         OPENSSL_free(ctx);
662     }
663 }
664