2 * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
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
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"
22 * Encoder can have multiple names, separated with colons in a name string
24 #define NAME_SEPARATOR ':'
26 /* Simple method structure constructor and destructor */
27 static OSSL_ENCODER *ossl_encoder_new(void)
29 OSSL_ENCODER *encoder = NULL;
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);
38 encoder->base.refcnt = 1;
43 int OSSL_ENCODER_up_ref(OSSL_ENCODER *encoder)
47 CRYPTO_UP_REF(&encoder->base.refcnt, &ref, encoder->base.lock);
51 void OSSL_ENCODER_free(OSSL_ENCODER *encoder)
58 CRYPTO_DOWN_REF(&encoder->base.refcnt, &ref, encoder->base.lock);
61 ossl_provider_free(encoder->base.prov);
62 CRYPTO_THREAD_lock_free(encoder->base.lock);
63 OPENSSL_free(encoder);
66 /* Permanent encoder method store, constructor and destructor */
67 static void encoder_store_free(void *vstore)
69 ossl_method_store_free(vstore);
72 static void *encoder_store_new(OSSL_LIB_CTX *ctx)
74 return ossl_method_store_new(ctx);
78 static const OSSL_LIB_CTX_METHOD encoder_store_method = {
83 /* Data to be passed through ossl_method_construct() */
84 struct encoder_data_st {
86 OSSL_METHOD_CONSTRUCT_METHOD *mcm;
87 int id; /* For get_encoder_from_store() */
88 const char *names; /* For get_encoder_from_store() */
89 const char *propquery; /* For get_encoder_from_store() */
91 unsigned int flag_construct_error_occurred : 1;
95 * Generic routines to fetch / create ENCODER methods with
96 * ossl_method_construct()
99 /* Temporary encoder method store, constructor and destructor */
100 static void *alloc_tmp_encoder_store(OSSL_LIB_CTX *ctx)
102 return ossl_method_store_new(ctx);
105 static void dealloc_tmp_encoder_store(void *store)
108 ossl_method_store_free(store);
111 /* Get the permanent encoder store */
112 static OSSL_METHOD_STORE *get_encoder_store(OSSL_LIB_CTX *libctx)
114 return ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_ENCODER_STORE_INDEX,
115 &encoder_store_method);
118 /* Get encoder methods from a store, or put one in */
119 static void *get_encoder_from_store(OSSL_LIB_CTX *libctx, void *store,
122 struct encoder_data_st *methdata = data;
126 if ((id = methdata->id) == 0) {
127 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
129 id = ossl_namemap_name2num(namemap, methdata->names);
133 && (store = get_encoder_store(libctx)) == NULL)
136 if (!ossl_method_store_fetch(store, id, methdata->propquery, &method))
141 static int put_encoder_in_store(OSSL_LIB_CTX *libctx, void *store,
142 void *method, const OSSL_PROVIDER *prov,
143 int operation_id, const char *names,
144 const char *propdef, void *unused)
146 OSSL_NAMEMAP *namemap;
149 if ((namemap = ossl_namemap_stored(libctx)) == NULL
150 || (id = ossl_namemap_name2num(namemap, names)) == 0)
153 if (store == NULL && (store = get_encoder_store(libctx)) == NULL)
156 return ossl_method_store_add(store, prov, id, propdef, method,
157 (int (*)(void *))OSSL_ENCODER_up_ref,
158 (void (*)(void *))OSSL_ENCODER_free);
161 /* Create and populate a encoder method */
162 static void *encoder_from_algorithm(int id, const OSSL_ALGORITHM *algodef,
165 OSSL_ENCODER *encoder = NULL;
166 const OSSL_DISPATCH *fns = algodef->implementation;
168 if ((encoder = ossl_encoder_new()) == NULL)
170 encoder->base.id = id;
171 encoder->base.propdef = algodef->property_definition;
172 encoder->base.description = algodef->algorithm_description;
174 for (; fns->function_id != 0; fns++) {
175 switch (fns->function_id) {
176 case OSSL_FUNC_ENCODER_NEWCTX:
177 if (encoder->newctx == NULL)
179 OSSL_FUNC_encoder_newctx(fns);
181 case OSSL_FUNC_ENCODER_FREECTX:
182 if (encoder->freectx == NULL)
184 OSSL_FUNC_encoder_freectx(fns);
186 case OSSL_FUNC_ENCODER_GET_PARAMS:
187 if (encoder->get_params == NULL)
188 encoder->get_params =
189 OSSL_FUNC_encoder_get_params(fns);
191 case OSSL_FUNC_ENCODER_GETTABLE_PARAMS:
192 if (encoder->gettable_params == NULL)
193 encoder->gettable_params =
194 OSSL_FUNC_encoder_gettable_params(fns);
196 case OSSL_FUNC_ENCODER_SET_CTX_PARAMS:
197 if (encoder->set_ctx_params == NULL)
198 encoder->set_ctx_params =
199 OSSL_FUNC_encoder_set_ctx_params(fns);
201 case OSSL_FUNC_ENCODER_SETTABLE_CTX_PARAMS:
202 if (encoder->settable_ctx_params == NULL)
203 encoder->settable_ctx_params =
204 OSSL_FUNC_encoder_settable_ctx_params(fns);
206 case OSSL_FUNC_ENCODER_DOES_SELECTION:
207 if (encoder->does_selection == NULL)
208 encoder->does_selection =
209 OSSL_FUNC_encoder_does_selection(fns);
211 case OSSL_FUNC_ENCODER_ENCODE:
212 if (encoder->encode == NULL)
213 encoder->encode = OSSL_FUNC_encoder_encode(fns);
215 case OSSL_FUNC_ENCODER_IMPORT_OBJECT:
216 if (encoder->import_object == NULL)
217 encoder->import_object =
218 OSSL_FUNC_encoder_import_object(fns);
220 case OSSL_FUNC_ENCODER_FREE_OBJECT:
221 if (encoder->free_object == NULL)
222 encoder->free_object =
223 OSSL_FUNC_encoder_free_object(fns);
228 * Try to check that the method is sensible.
229 * If you have a constructor, you must have a destructor and vice versa.
230 * You must have the encoding driver functions.
232 if (!((encoder->newctx == NULL && encoder->freectx == NULL)
233 || (encoder->newctx != NULL && encoder->freectx != NULL)
234 || (encoder->import_object != NULL && encoder->free_object != NULL)
235 || (encoder->import_object == NULL && encoder->free_object == NULL))
236 || encoder->encode == NULL
237 || encoder->gettable_params == NULL
238 || encoder->get_params == NULL) {
239 OSSL_ENCODER_free(encoder);
240 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_INVALID_PROVIDER_FUNCTIONS);
244 if (prov != NULL && !ossl_provider_up_ref(prov)) {
245 OSSL_ENCODER_free(encoder);
249 encoder->base.prov = prov;
255 * The core fetching functionality passes the names of the implementation.
256 * This function is responsible to getting an identity number for them,
257 * then call encoder_from_algorithm() with that identity number.
259 static void *construct_encoder(const OSSL_ALGORITHM *algodef,
260 OSSL_PROVIDER *prov, void *data)
263 * This function is only called if get_encoder_from_store() returned
264 * NULL, so it's safe to say that of all the spots to create a new
265 * namemap entry, this is it. Should the name already exist there, we
266 * know that ossl_namemap_add() will return its corresponding number.
268 struct encoder_data_st *methdata = data;
269 OSSL_LIB_CTX *libctx = ossl_provider_libctx(prov);
270 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
271 const char *names = algodef->algorithm_names;
272 int id = ossl_namemap_add_names(namemap, 0, names, NAME_SEPARATOR);
276 method = encoder_from_algorithm(id, algodef, prov);
279 * Flag to indicate that there was actual construction errors. This
280 * helps inner_evp_generic_fetch() determine what error it should
281 * record on inaccessible algorithms.
284 methdata->flag_construct_error_occurred = 1;
289 /* Intermediary function to avoid ugly casts, used below */
290 static void destruct_encoder(void *method, void *data)
292 OSSL_ENCODER_free(method);
295 static int up_ref_encoder(void *method)
297 return OSSL_ENCODER_up_ref(method);
300 static void free_encoder(void *method)
302 OSSL_ENCODER_free(method);
305 /* Fetching support. Can fetch by numeric identity or by name */
306 static OSSL_ENCODER *inner_ossl_encoder_fetch(OSSL_LIB_CTX *libctx,
307 int id, const char *name,
308 const char *properties)
310 OSSL_METHOD_STORE *store = get_encoder_store(libctx);
311 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
315 if (store == NULL || namemap == NULL) {
316 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_INVALID_ARGUMENT);
321 * If we have been passed neither a name_id or a name, we have an
322 * internal programming error.
324 if (!ossl_assert(id != 0 || name != NULL)) {
325 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_INTERNAL_ERROR);
330 id = ossl_namemap_name2num(namemap, name);
333 * If we haven't found the name yet, chances are that the algorithm to
334 * be fetched is unsupported.
340 || !ossl_method_store_cache_get(store, id, properties, &method)) {
341 OSSL_METHOD_CONSTRUCT_METHOD mcm = {
342 alloc_tmp_encoder_store,
343 dealloc_tmp_encoder_store,
344 get_encoder_from_store,
345 put_encoder_in_store,
349 struct encoder_data_st mcmdata;
351 mcmdata.libctx = libctx;
354 mcmdata.names = name;
355 mcmdata.propquery = properties;
356 mcmdata.flag_construct_error_occurred = 0;
357 if ((method = ossl_method_construct(libctx, OSSL_OP_ENCODER,
358 0 /* !force_cache */,
359 &mcm, &mcmdata)) != NULL) {
361 * If construction did create a method for us, we know that
362 * there is a correct name_id and meth_id, since those have
363 * already been calculated in get_encoder_from_store() and
364 * put_encoder_in_store() above.
367 id = ossl_namemap_name2num(namemap, name);
368 ossl_method_store_cache_set(store, id, properties, method,
369 up_ref_encoder, free_encoder);
373 * If we never were in the constructor, the algorithm to be fetched
376 unsupported = !mcmdata.flag_construct_error_occurred;
379 if (method == NULL) {
380 int code = unsupported ? ERR_R_UNSUPPORTED : ERR_R_FETCH_FAILED;
383 name = ossl_namemap_num2name(namemap, id, 0);
384 ERR_raise_data(ERR_LIB_OSSL_ENCODER, code,
385 "%s, Name (%s : %d), Properties (%s)",
386 ossl_lib_ctx_get_descriptor(libctx),
387 name = NULL ? "<null>" : name, id,
388 properties == NULL ? "<null>" : properties);
394 OSSL_ENCODER *OSSL_ENCODER_fetch(OSSL_LIB_CTX *libctx, const char *name,
395 const char *properties)
397 return inner_ossl_encoder_fetch(libctx, 0, name, properties);
400 OSSL_ENCODER *ossl_encoder_fetch_by_number(OSSL_LIB_CTX *libctx, int id,
401 const char *properties)
403 return inner_ossl_encoder_fetch(libctx, id, NULL, properties);
407 * Library of basic method functions
410 const OSSL_PROVIDER *OSSL_ENCODER_provider(const OSSL_ENCODER *encoder)
412 if (!ossl_assert(encoder != NULL)) {
413 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
417 return encoder->base.prov;
420 const char *OSSL_ENCODER_properties(const OSSL_ENCODER *encoder)
422 if (!ossl_assert(encoder != NULL)) {
423 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
427 return encoder->base.propdef;
430 int OSSL_ENCODER_number(const OSSL_ENCODER *encoder)
432 if (!ossl_assert(encoder != NULL)) {
433 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
437 return encoder->base.id;
440 const char *OSSL_ENCODER_description(const OSSL_ENCODER *encoder)
442 return encoder->base.description;
445 int OSSL_ENCODER_is_a(const OSSL_ENCODER *encoder, const char *name)
447 if (encoder->base.prov != NULL) {
448 OSSL_LIB_CTX *libctx = ossl_provider_libctx(encoder->base.prov);
449 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
451 return ossl_namemap_name2num(namemap, name) == encoder->base.id;
456 struct encoder_do_all_data_st {
457 void (*user_fn)(void *method, void *arg);
461 static void encoder_do_one(OSSL_PROVIDER *provider,
462 const OSSL_ALGORITHM *algodef,
463 int no_store, void *vdata)
465 struct encoder_do_all_data_st *data = vdata;
466 OSSL_LIB_CTX *libctx = ossl_provider_libctx(provider);
467 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
468 const char *names = algodef->algorithm_names;
469 int id = ossl_namemap_add_names(namemap, 0, names, NAME_SEPARATOR);
474 encoder_from_algorithm(id, algodef, provider);
476 if (method != NULL) {
477 data->user_fn(method, data->user_arg);
478 OSSL_ENCODER_free(method);
482 void OSSL_ENCODER_do_all_provided(OSSL_LIB_CTX *libctx,
483 void (*fn)(OSSL_ENCODER *encoder, void *arg),
486 struct encoder_do_all_data_st data;
488 data.user_fn = (void (*)(void *, void *))fn;
492 * No pre- or post-condition for this call, as this only creates methods
493 * temporarly and then promptly destroys them.
495 ossl_algorithm_do_all(libctx, OSSL_OP_ENCODER, NULL, NULL,
496 encoder_do_one, NULL, &data);
499 int OSSL_ENCODER_names_do_all(const OSSL_ENCODER *encoder,
500 void (*fn)(const char *name, void *data),
506 if (encoder->base.prov != NULL) {
507 OSSL_LIB_CTX *libctx = ossl_provider_libctx(encoder->base.prov);
508 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
510 return ossl_namemap_doall_names(namemap, encoder->base.id, fn, data);
517 OSSL_ENCODER_gettable_params(OSSL_ENCODER *encoder)
519 if (encoder != NULL && encoder->gettable_params != NULL) {
520 void *provctx = ossl_provider_ctx(OSSL_ENCODER_provider(encoder));
522 return encoder->gettable_params(provctx);
527 int OSSL_ENCODER_get_params(OSSL_ENCODER *encoder, OSSL_PARAM params[])
529 if (encoder != NULL && encoder->get_params != NULL)
530 return encoder->get_params(params);
534 const OSSL_PARAM *OSSL_ENCODER_settable_ctx_params(OSSL_ENCODER *encoder)
536 if (encoder != NULL && encoder->settable_ctx_params != NULL) {
537 void *provctx = ossl_provider_ctx(OSSL_ENCODER_provider(encoder));
539 return encoder->settable_ctx_params(provctx);
545 * Encoder context support
548 OSSL_ENCODER_CTX *OSSL_ENCODER_CTX_new(void)
550 OSSL_ENCODER_CTX *ctx;
552 if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) == NULL)
553 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_MALLOC_FAILURE);
558 int OSSL_ENCODER_CTX_set_params(OSSL_ENCODER_CTX *ctx,
559 const OSSL_PARAM params[])
565 if (!ossl_assert(ctx != NULL)) {
566 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
570 if (ctx->encoder_insts == NULL)
573 l = OSSL_ENCODER_CTX_get_num_encoders(ctx);
574 for (i = 0; i < l; i++) {
575 OSSL_ENCODER_INSTANCE *encoder_inst =
576 sk_OSSL_ENCODER_INSTANCE_value(ctx->encoder_insts, i);
577 OSSL_ENCODER *encoder = OSSL_ENCODER_INSTANCE_get_encoder(encoder_inst);
578 void *encoderctx = OSSL_ENCODER_INSTANCE_get_encoder_ctx(encoder_inst);
580 if (encoderctx == NULL || encoder->set_ctx_params == NULL)
582 if (!encoder->set_ctx_params(encoderctx, params))
588 void OSSL_ENCODER_CTX_free(OSSL_ENCODER_CTX *ctx)
591 sk_OSSL_ENCODER_INSTANCE_pop_free(ctx->encoder_insts,
592 ossl_encoder_instance_free);
593 OPENSSL_free(ctx->construct_data);
594 ossl_pw_clear_passphrase_data(&ctx->pwdata);