crypto/encode_decode/encoder_meth.c

   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
  27 static void ossl_encoder_free(void *data)
  28 {
  29     OSSL_ENCODER_free(data);
  30 }
  31
  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 */
  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
  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
  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 */
  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
 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 */
 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
 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
 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 */
 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
 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 */
 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  */
 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 */
 344 static void destruct_encoder(void *method, void *data)
 345 {
 346     OSSL_ENCODER_free(method);
 347 }
 348
 349 static int up_ref_encoder(void *method)
 350 {
 351     return OSSL_ENCODER_up_ref(method);
 352 }
 353
 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 *
 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
 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
 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
 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
 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
 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 *
 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
 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
 514 const char *OSSL_ENCODER_get0_name(const OSSL_ENCODER *encoder)
 515 {
 516     return encoder->base.name;
 517 }
 518
 519 const char *OSSL_ENCODER_get0_description(const OSSL_ENCODER *encoder)
 520 {
 521     return encoder->base.algodef->algorithm_description;
 522 }
 523
 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
 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
 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
 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 *
 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
 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
 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
 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
 624 int OSSL_ENCODER_CTX_set_params(OSSL_ENCODER_CTX *ctx,
 625                                 const OSSL_PARAM params[])
 626 {
 627     int ok = 1;
 628     int i;
 629     int 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
 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 }