crypto/encode_decode/encoder_meth.c

   1 /*
   2  * Copyright 2019-2021 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
  21 /*
  22  * Encoder can have multiple names, separated with colons in a name string
  23  */
  24 #define NAME_SEPARATOR ':'
  25
  26 /* Simple method structure constructor and destructor */
  27 static OSSL_ENCODER *ossl_encoder_new(void)
  28 {
  29     OSSL_ENCODER *encoder = NULL;
  30
  31     if ((encoder = OPENSSL_zalloc(sizeof(*encoder))) == NULL
  32         || (encoder->base.lock = CRYPTO_THREAD_lock_new()) == NULL) {
  33         OSSL_ENCODER_free(encoder);
  34         ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_MALLOC_FAILURE);
  35         return NULL;
  36     }
  37
  38     encoder->base.refcnt = 1;
  39
  40     return encoder;
  41 }
  42
  43 int OSSL_ENCODER_up_ref(OSSL_ENCODER *encoder)
  44 {
  45     int ref = 0;
  46
  47     CRYPTO_UP_REF(&encoder->base.refcnt, &ref, encoder->base.lock);
  48     return 1;
  49 }
  50
  51 void OSSL_ENCODER_free(OSSL_ENCODER *encoder)
  52 {
  53     int ref = 0;
  54
  55     if (encoder == NULL)
  56         return;
  57
  58     CRYPTO_DOWN_REF(&encoder->base.refcnt, &ref, encoder->base.lock);
  59     if (ref > 0)
  60         return;
  61     OPENSSL_free(encoder->base.name);
  62     ossl_property_free(encoder->base.parsed_propdef);
  63     ossl_provider_free(encoder->base.prov);
  64     CRYPTO_THREAD_lock_free(encoder->base.lock);
  65     OPENSSL_free(encoder);
  66 }
  67
  68 /* Permanent encoder method store, constructor and destructor */
  69 static void encoder_store_free(void *vstore)
  70 {
  71     ossl_method_store_free(vstore);
  72 }
  73
  74 static void *encoder_store_new(OSSL_LIB_CTX *ctx)
  75 {
  76     return ossl_method_store_new(ctx);
  77 }
  78
  79
  80 static const OSSL_LIB_CTX_METHOD encoder_store_method = {
  81     /* We want encoder_store to be cleaned up before the provider store */
  82     OSSL_LIB_CTX_METHOD_PRIORITY_2,
  83     encoder_store_new,
  84     encoder_store_free,
  85 };
  86
  87 /* Data to be passed through ossl_method_construct() */
  88 struct encoder_data_st {
  89     OSSL_LIB_CTX *libctx;
  90     int id;                      /* For get_encoder_from_store() */
  91     const char *names;           /* For get_encoder_from_store() */
  92     const char *propquery;       /* For get_encoder_from_store() */
  93
  94     OSSL_METHOD_STORE *tmp_store; /* For get_tmp_encoder_store() */
  95
  96     unsigned int flag_construct_error_occurred : 1;
  97 };
  98
  99 /*
 100  * Generic routines to fetch / create ENCODER methods with
 101  * ossl_method_construct()
 102  */
 103
 104 /* Temporary encoder method store, constructor and destructor */
 105 static void *get_tmp_encoder_store(void *data)
 106 {
 107     struct encoder_data_st *methdata = data;
 108
 109     if (methdata->tmp_store == NULL)
 110         methdata->tmp_store = ossl_method_store_new(methdata->libctx);
 111     return methdata->tmp_store;
 112 }
 113
 114 static void dealloc_tmp_encoder_store(void *store)
 115 {
 116     if (store != NULL)
 117         ossl_method_store_free(store);
 118 }
 119
 120 /* Get the permanent encoder store */
 121 static OSSL_METHOD_STORE *get_encoder_store(OSSL_LIB_CTX *libctx)
 122 {
 123     return ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_ENCODER_STORE_INDEX,
 124                                  &encoder_store_method);
 125 }
 126
 127 /* Get encoder methods from a store, or put one in */
 128 static void *get_encoder_from_store(void *store, const OSSL_PROVIDER **prov,
 129                                     void *data)
 130 {
 131     struct encoder_data_st *methdata = data;
 132     void *method = NULL;
 133     int id;
 134
 135     /*
 136      * get_encoder_from_store() is only called to try and get the method
 137      * that OSSL_ENCODER_fetch() is asking for, and the name or name id are
 138      * passed via methdata.
 139      */
 140     if ((id = methdata->id) == 0 && methdata->names != NULL) {
 141         OSSL_NAMEMAP *namemap = ossl_namemap_stored(methdata->libctx);
 142         const char *names = methdata->names;
 143         const char *q = strchr(names, NAME_SEPARATOR);
 144         size_t l = (q == NULL ? strlen(names) : (size_t)(q - names));
 145
 146         if (namemap == 0)
 147             return NULL;
 148         id = ossl_namemap_name2num_n(namemap, methdata->names, l);
 149     }
 150
 151     if (id == 0)
 152         return NULL;
 153
 154     if (store == NULL
 155         && (store = get_encoder_store(methdata->libctx)) == NULL)
 156         return NULL;
 157
 158     if (!ossl_method_store_fetch(store, id, methdata->propquery, prov, &method))
 159         return NULL;
 160     return method;
 161 }
 162
 163 static int put_encoder_in_store(void *store, void *method,
 164                                 const OSSL_PROVIDER *prov,
 165                                 const char *names, const char *propdef,
 166                                 void *data)
 167 {
 168     struct encoder_data_st *methdata = data;
 169     OSSL_NAMEMAP *namemap;
 170     int id;
 171     size_t l = 0;
 172
 173     /*
 174      * put_encoder_in_store() is only called with an OSSL_ENCODER method that
 175      * was successfully created by construct_encoder() below, which means that
 176      * all the names should already be stored in the namemap with the same
 177      * numeric identity, so just use the first to get that identity.
 178      */
 179     if (names != NULL) {
 180         const char *q = strchr(names, NAME_SEPARATOR);
 181
 182         l = (q == NULL ? strlen(names) : (size_t)(q - names));
 183     }
 184
 185     if ((namemap = ossl_namemap_stored(methdata->libctx)) == NULL
 186         || (id = ossl_namemap_name2num_n(namemap, names, l)) == 0)
 187         return 0;
 188
 189     if (store == NULL && (store = get_encoder_store(methdata->libctx)) == NULL)
 190         return 0;
 191
 192     return ossl_method_store_add(store, prov, id, propdef, method,
 193                                  (int (*)(void *))OSSL_ENCODER_up_ref,
 194                                  (void (*)(void *))OSSL_ENCODER_free);
 195 }
 196
 197 /* Create and populate a encoder method */
 198 static void *encoder_from_algorithm(int id, const OSSL_ALGORITHM *algodef,
 199                                     OSSL_PROVIDER *prov)
 200 {
 201     OSSL_ENCODER *encoder = NULL;
 202     const OSSL_DISPATCH *fns = algodef->implementation;
 203     OSSL_LIB_CTX *libctx = ossl_provider_libctx(prov);
 204
 205     if ((encoder = ossl_encoder_new()) == NULL)
 206         return NULL;
 207     encoder->base.id = id;
 208     if ((encoder->base.name = ossl_algorithm_get1_first_name(algodef)) == NULL) {
 209         OSSL_ENCODER_free(encoder);
 210         return NULL;
 211     }
 212     encoder->base.algodef = algodef;
 213     encoder->base.parsed_propdef
 214         = ossl_parse_property(libctx, algodef->property_definition);
 215
 216     for (; fns->function_id != 0; fns++) {
 217         switch (fns->function_id) {
 218         case OSSL_FUNC_ENCODER_NEWCTX:
 219             if (encoder->newctx == NULL)
 220                 encoder->newctx =
 221                     OSSL_FUNC_encoder_newctx(fns);
 222             break;
 223         case OSSL_FUNC_ENCODER_FREECTX:
 224             if (encoder->freectx == NULL)
 225                 encoder->freectx =
 226                     OSSL_FUNC_encoder_freectx(fns);
 227             break;
 228         case OSSL_FUNC_ENCODER_GET_PARAMS:
 229             if (encoder->get_params == NULL)
 230                 encoder->get_params =
 231                     OSSL_FUNC_encoder_get_params(fns);
 232             break;
 233         case OSSL_FUNC_ENCODER_GETTABLE_PARAMS:
 234             if (encoder->gettable_params == NULL)
 235                 encoder->gettable_params =
 236                     OSSL_FUNC_encoder_gettable_params(fns);
 237             break;
 238         case OSSL_FUNC_ENCODER_SET_CTX_PARAMS:
 239             if (encoder->set_ctx_params == NULL)
 240                 encoder->set_ctx_params =
 241                     OSSL_FUNC_encoder_set_ctx_params(fns);
 242             break;
 243         case OSSL_FUNC_ENCODER_SETTABLE_CTX_PARAMS:
 244             if (encoder->settable_ctx_params == NULL)
 245                 encoder->settable_ctx_params =
 246                     OSSL_FUNC_encoder_settable_ctx_params(fns);
 247             break;
 248         case OSSL_FUNC_ENCODER_DOES_SELECTION:
 249             if (encoder->does_selection == NULL)
 250                 encoder->does_selection =
 251                     OSSL_FUNC_encoder_does_selection(fns);
 252             break;
 253         case OSSL_FUNC_ENCODER_ENCODE:
 254             if (encoder->encode == NULL)
 255                 encoder->encode = OSSL_FUNC_encoder_encode(fns);
 256             break;
 257         case OSSL_FUNC_ENCODER_IMPORT_OBJECT:
 258             if (encoder->import_object == NULL)
 259                 encoder->import_object =
 260                     OSSL_FUNC_encoder_import_object(fns);
 261             break;
 262         case OSSL_FUNC_ENCODER_FREE_OBJECT:
 263             if (encoder->free_object == NULL)
 264                 encoder->free_object =
 265                     OSSL_FUNC_encoder_free_object(fns);
 266             break;
 267         }
 268     }
 269     /*
 270      * Try to check that the method is sensible.
 271      * If you have a constructor, you must have a destructor and vice versa.
 272      * You must have the encoding driver functions.
 273      */
 274     if (!((encoder->newctx == NULL && encoder->freectx == NULL)
 275           || (encoder->newctx != NULL && encoder->freectx != NULL)
 276           || (encoder->import_object != NULL && encoder->free_object != NULL)
 277           || (encoder->import_object == NULL && encoder->free_object == NULL))
 278         || encoder->encode == NULL) {
 279         OSSL_ENCODER_free(encoder);
 280         ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_INVALID_PROVIDER_FUNCTIONS);
 281         return NULL;
 282     }
 283
 284     if (prov != NULL && !ossl_provider_up_ref(prov)) {
 285         OSSL_ENCODER_free(encoder);
 286         return NULL;
 287     }
 288
 289     encoder->base.prov = prov;
 290     return encoder;
 291 }
 292
 293
 294 /*
 295  * The core fetching functionality passes the names of the implementation.
 296  * This function is responsible to getting an identity number for them,
 297  * then call encoder_from_algorithm() with that identity number.
 298  */
 299 static void *construct_encoder(const OSSL_ALGORITHM *algodef,
 300                                OSSL_PROVIDER *prov, void *data)
 301 {
 302     /*
 303      * This function is only called if get_encoder_from_store() returned
 304      * NULL, so it's safe to say that of all the spots to create a new
 305      * namemap entry, this is it.  Should the name already exist there, we
 306      * know that ossl_namemap_add() will return its corresponding number.
 307      */
 308     struct encoder_data_st *methdata = data;
 309     OSSL_LIB_CTX *libctx = ossl_provider_libctx(prov);
 310     OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
 311     const char *names = algodef->algorithm_names;
 312     int id = ossl_namemap_add_names(namemap, 0, names, NAME_SEPARATOR);
 313     void *method = NULL;
 314
 315     if (id != 0)
 316         method = encoder_from_algorithm(id, algodef, prov);
 317
 318     /*
 319      * Flag to indicate that there was actual construction errors.  This
 320      * helps inner_evp_generic_fetch() determine what error it should
 321      * record on inaccessible algorithms.
 322      */
 323     if (method == NULL)
 324         methdata->flag_construct_error_occurred = 1;
 325
 326     return method;
 327 }
 328
 329 /* Intermediary function to avoid ugly casts, used below */
 330 static void destruct_encoder(void *method, void *data)
 331 {
 332     OSSL_ENCODER_free(method);
 333 }
 334
 335 static int up_ref_encoder(void *method)
 336 {
 337     return OSSL_ENCODER_up_ref(method);
 338 }
 339
 340 static void free_encoder(void *method)
 341 {
 342     OSSL_ENCODER_free(method);
 343 }
 344
 345 /* Fetching support.  Can fetch by numeric identity or by name */
 346 static OSSL_ENCODER *
 347 inner_ossl_encoder_fetch(struct encoder_data_st *methdata, int id,
 348                          const char *name, const char *properties)
 349 {
 350     OSSL_METHOD_STORE *store = get_encoder_store(methdata->libctx);
 351     OSSL_NAMEMAP *namemap = ossl_namemap_stored(methdata->libctx);
 352     void *method = NULL;
 353     int unsupported = 0;
 354
 355     if (store == NULL || namemap == NULL) {
 356         ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_INVALID_ARGUMENT);
 357         return NULL;
 358     }
 359
 360     /*
 361      * If we have been passed both an id and a name, we have an
 362      * internal programming error.
 363      */
 364     if (!ossl_assert(id == 0 || name == NULL)) {
 365         ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_INTERNAL_ERROR);
 366         return NULL;
 367     }
 368
 369     if (id == 0)
 370         id = ossl_namemap_name2num(namemap, name);
 371
 372     /*
 373      * If we haven't found the name yet, chances are that the algorithm to
 374      * be fetched is unsupported.
 375      */
 376     if (id == 0)
 377         unsupported = 1;
 378
 379     if (id == 0
 380         || !ossl_method_store_cache_get(store, NULL, id, properties, &method)) {
 381         OSSL_METHOD_CONSTRUCT_METHOD mcm = {
 382             get_tmp_encoder_store,
 383             get_encoder_from_store,
 384             put_encoder_in_store,
 385             construct_encoder,
 386             destruct_encoder
 387         };
 388
 389         methdata->id = id;
 390         methdata->names = name;
 391         methdata->propquery = properties;
 392         methdata->flag_construct_error_occurred = 0;
 393         if ((method = ossl_method_construct(methdata->libctx, OSSL_OP_ENCODER,
 394                                             NULL, 0 /* !force_cache */,
 395                                             &mcm, methdata)) != NULL) {
 396             /*
 397              * If construction did create a method for us, we know that
 398              * there is a correct name_id and meth_id, since those have
 399              * already been calculated in get_encoder_from_store() and
 400              * put_encoder_in_store() above.
 401              */
 402             if (id == 0)
 403                 id = ossl_namemap_name2num(namemap, name);
 404             ossl_method_store_cache_set(store, NULL, id, properties, method,
 405                                         up_ref_encoder, free_encoder);
 406         }
 407
 408         /*
 409          * If we never were in the constructor, the algorithm to be fetched
 410          * is unsupported.
 411          */
 412         unsupported = !methdata->flag_construct_error_occurred;
 413     }
 414
 415     if ((id != 0 || name != NULL) && method == NULL) {
 416         int code = unsupported ? ERR_R_UNSUPPORTED : ERR_R_FETCH_FAILED;
 417
 418         if (name == NULL)
 419             name = ossl_namemap_num2name(namemap, id, 0);
 420         ERR_raise_data(ERR_LIB_OSSL_ENCODER, code,
 421                        "%s, Name (%s : %d), Properties (%s)",
 422                        ossl_lib_ctx_get_descriptor(methdata->libctx),
 423                        name = NULL ? "<null>" : name, id,
 424                        properties == NULL ? "<null>" : properties);
 425     }
 426
 427     return method;
 428 }
 429
 430 OSSL_ENCODER *OSSL_ENCODER_fetch(OSSL_LIB_CTX *libctx, const char *name,
 431                                  const char *properties)
 432 {
 433     struct encoder_data_st methdata;
 434     void *method;
 435
 436     methdata.libctx = libctx;
 437     methdata.tmp_store = NULL;
 438     method = inner_ossl_encoder_fetch(&methdata, 0, name, properties);
 439     dealloc_tmp_encoder_store(methdata.tmp_store);
 440     return method;
 441 }
 442
 443 OSSL_ENCODER *ossl_encoder_fetch_by_number(OSSL_LIB_CTX *libctx, int id,
 444                                            const char *properties)
 445 {
 446     struct encoder_data_st methdata;
 447     void *method;
 448
 449     methdata.libctx = libctx;
 450     methdata.tmp_store = NULL;
 451     method = inner_ossl_encoder_fetch(&methdata, id, NULL, properties);
 452     dealloc_tmp_encoder_store(methdata.tmp_store);
 453     return method;
 454 }
 455
 456 /*
 457  * Library of basic method functions
 458  */
 459
 460 const OSSL_PROVIDER *OSSL_ENCODER_get0_provider(const OSSL_ENCODER *encoder)
 461 {
 462     if (!ossl_assert(encoder != NULL)) {
 463         ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
 464         return 0;
 465     }
 466
 467     return encoder->base.prov;
 468 }
 469
 470 const char *OSSL_ENCODER_get0_properties(const OSSL_ENCODER *encoder)
 471 {
 472     if (!ossl_assert(encoder != NULL)) {
 473         ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
 474         return 0;
 475     }
 476
 477     return encoder->base.algodef->property_definition;
 478 }
 479
 480 const OSSL_PROPERTY_LIST *
 481 ossl_encoder_parsed_properties(const OSSL_ENCODER *encoder)
 482 {
 483     if (!ossl_assert(encoder != NULL)) {
 484         ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
 485         return 0;
 486     }
 487
 488     return encoder->base.parsed_propdef;
 489 }
 490
 491 int ossl_encoder_get_number(const OSSL_ENCODER *encoder)
 492 {
 493     if (!ossl_assert(encoder != NULL)) {
 494         ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
 495         return 0;
 496     }
 497
 498     return encoder->base.id;
 499 }
 500
 501 const char *OSSL_ENCODER_get0_name(const OSSL_ENCODER *encoder)
 502 {
 503     return encoder->base.name;
 504 }
 505
 506 const char *OSSL_ENCODER_get0_description(const OSSL_ENCODER *encoder)
 507 {
 508     return encoder->base.algodef->algorithm_description;
 509 }
 510
 511 int OSSL_ENCODER_is_a(const OSSL_ENCODER *encoder, const char *name)
 512 {
 513     if (encoder->base.prov != NULL) {
 514         OSSL_LIB_CTX *libctx = ossl_provider_libctx(encoder->base.prov);
 515         OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
 516
 517         return ossl_namemap_name2num(namemap, name) == encoder->base.id;
 518     }
 519     return 0;
 520 }
 521
 522 struct do_one_data_st {
 523     void (*user_fn)(OSSL_ENCODER *encoder, void *arg);
 524     void *user_arg;
 525 };
 526
 527 static void do_one(ossl_unused int id, void *method, void *arg)
 528 {
 529     struct do_one_data_st *data = arg;
 530
 531     data->user_fn(method, data->user_arg);
 532 }
 533
 534 void OSSL_ENCODER_do_all_provided(OSSL_LIB_CTX *libctx,
 535                                   void (*user_fn)(OSSL_ENCODER *encoder,
 536                                                   void *arg),
 537                                   void *user_arg)
 538 {
 539     struct encoder_data_st methdata;
 540     struct do_one_data_st data;
 541
 542     methdata.libctx = libctx;
 543     methdata.tmp_store = NULL;
 544     (void)inner_ossl_encoder_fetch(&methdata, 0, NULL, NULL /* properties */);
 545
 546     data.user_fn = user_fn;
 547     data.user_arg = user_arg;
 548     if (methdata.tmp_store != NULL)
 549         ossl_method_store_do_all(methdata.tmp_store, &do_one, &data);
 550     ossl_method_store_do_all(get_encoder_store(libctx), &do_one, &data);
 551     dealloc_tmp_encoder_store(methdata.tmp_store);
 552 }
 553
 554 int OSSL_ENCODER_names_do_all(const OSSL_ENCODER *encoder,
 555                               void (*fn)(const char *name, void *data),
 556                               void *data)
 557 {
 558     if (encoder == NULL)
 559         return 0;
 560
 561     if (encoder->base.prov != NULL) {
 562         OSSL_LIB_CTX *libctx = ossl_provider_libctx(encoder->base.prov);
 563         OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
 564
 565         return ossl_namemap_doall_names(namemap, encoder->base.id, fn, data);
 566     }
 567
 568     return 1;
 569 }
 570
 571 const OSSL_PARAM *
 572 OSSL_ENCODER_gettable_params(OSSL_ENCODER *encoder)
 573 {
 574     if (encoder != NULL && encoder->gettable_params != NULL) {
 575         void *provctx = ossl_provider_ctx(OSSL_ENCODER_get0_provider(encoder));
 576
 577         return encoder->gettable_params(provctx);
 578     }
 579     return NULL;
 580 }
 581
 582 int OSSL_ENCODER_get_params(OSSL_ENCODER *encoder, OSSL_PARAM params[])
 583 {
 584     if (encoder != NULL && encoder->get_params != NULL)
 585         return encoder->get_params(params);
 586     return 0;
 587 }
 588
 589 const OSSL_PARAM *OSSL_ENCODER_settable_ctx_params(OSSL_ENCODER *encoder)
 590 {
 591     if (encoder != NULL && encoder->settable_ctx_params != NULL) {
 592         void *provctx = ossl_provider_ctx(OSSL_ENCODER_get0_provider(encoder));
 593
 594         return encoder->settable_ctx_params(provctx);
 595     }
 596     return NULL;
 597 }
 598
 599 /*
 600  * Encoder context support
 601  */
 602
 603 OSSL_ENCODER_CTX *OSSL_ENCODER_CTX_new(void)
 604 {
 605     OSSL_ENCODER_CTX *ctx;
 606
 607     if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) == NULL)
 608         ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_MALLOC_FAILURE);
 609
 610     return ctx;
 611 }
 612
 613 int OSSL_ENCODER_CTX_set_params(OSSL_ENCODER_CTX *ctx,
 614                                 const OSSL_PARAM params[])
 615 {
 616     int ok = 1;
 617     size_t i;
 618     size_t l;
 619
 620     if (!ossl_assert(ctx != NULL)) {
 621         ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
 622         return 0;
 623     }
 624
 625     if (ctx->encoder_insts == NULL)
 626         return 1;
 627
 628     l = OSSL_ENCODER_CTX_get_num_encoders(ctx);
 629     for (i = 0; i < l; i++) {
 630         OSSL_ENCODER_INSTANCE *encoder_inst =
 631             sk_OSSL_ENCODER_INSTANCE_value(ctx->encoder_insts, i);
 632         OSSL_ENCODER *encoder = OSSL_ENCODER_INSTANCE_get_encoder(encoder_inst);
 633         void *encoderctx = OSSL_ENCODER_INSTANCE_get_encoder_ctx(encoder_inst);
 634
 635         if (encoderctx == NULL || encoder->set_ctx_params == NULL)
 636             continue;
 637         if (!encoder->set_ctx_params(encoderctx, params))
 638             ok = 0;
 639     }
 640     return ok;
 641 }
 642
 643 void OSSL_ENCODER_CTX_free(OSSL_ENCODER_CTX *ctx)
 644 {
 645     if (ctx != NULL) {
 646         sk_OSSL_ENCODER_INSTANCE_pop_free(ctx->encoder_insts,
 647                                           ossl_encoder_instance_free);
 648         OPENSSL_free(ctx->construct_data);
 649         ossl_pw_clear_passphrase_data(&ctx->pwdata);
 650         OPENSSL_free(ctx);
 651     }
 652 }