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 OPENSSL_free(encoder->base.name);
62 ossl_provider_free(encoder->base.prov);
63 CRYPTO_THREAD_lock_free(encoder->base.lock);
64 OPENSSL_free(encoder);
67 /* Permanent encoder method store, constructor and destructor */
68 static void encoder_store_free(void *vstore)
70 ossl_method_store_free(vstore);
73 static void *encoder_store_new(OSSL_LIB_CTX *ctx)
75 return ossl_method_store_new(ctx);
79 static const OSSL_LIB_CTX_METHOD encoder_store_method = {
80 OSSL_LIB_CTX_METHOD_DEFAULT_PRIORITY,
85 /* Data to be passed through ossl_method_construct() */
86 struct encoder_data_st {
88 OSSL_METHOD_CONSTRUCT_METHOD *mcm;
89 int id; /* For get_encoder_from_store() */
90 const char *names; /* For get_encoder_from_store() */
91 const char *propquery; /* For get_encoder_from_store() */
93 unsigned int flag_construct_error_occurred : 1;
97 * Generic routines to fetch / create ENCODER methods with
98 * ossl_method_construct()
101 /* Temporary encoder method store, constructor and destructor */
102 static void *alloc_tmp_encoder_store(OSSL_LIB_CTX *ctx)
104 return ossl_method_store_new(ctx);
107 static void dealloc_tmp_encoder_store(void *store)
110 ossl_method_store_free(store);
113 /* Get the permanent encoder store */
114 static OSSL_METHOD_STORE *get_encoder_store(OSSL_LIB_CTX *libctx)
116 return ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_ENCODER_STORE_INDEX,
117 &encoder_store_method);
120 /* Get encoder methods from a store, or put one in */
121 static void *get_encoder_from_store(OSSL_LIB_CTX *libctx, void *store,
124 struct encoder_data_st *methdata = data;
128 if ((id = methdata->id) == 0) {
129 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
131 id = ossl_namemap_name2num(namemap, methdata->names);
135 && (store = get_encoder_store(libctx)) == NULL)
138 if (!ossl_method_store_fetch(store, id, methdata->propquery, &method))
143 static int put_encoder_in_store(OSSL_LIB_CTX *libctx, void *store,
144 void *method, const OSSL_PROVIDER *prov,
145 int operation_id, const char *names,
146 const char *propdef, void *unused)
148 OSSL_NAMEMAP *namemap;
151 if ((namemap = ossl_namemap_stored(libctx)) == NULL
152 || (id = ossl_namemap_name2num(namemap, names)) == 0)
155 if (store == NULL && (store = get_encoder_store(libctx)) == NULL)
158 return ossl_method_store_add(store, prov, id, propdef, method,
159 (int (*)(void *))OSSL_ENCODER_up_ref,
160 (void (*)(void *))OSSL_ENCODER_free);
163 /* Create and populate a encoder method */
164 static void *encoder_from_algorithm(int id, const OSSL_ALGORITHM *algodef,
167 OSSL_ENCODER *encoder = NULL;
168 const OSSL_DISPATCH *fns = algodef->implementation;
170 if ((encoder = ossl_encoder_new()) == NULL)
172 encoder->base.id = id;
173 if ((encoder->base.name = ossl_algorithm_get1_first_name(algodef)) == NULL) {
174 OSSL_ENCODER_free(encoder);
177 encoder->base.propdef = algodef->property_definition;
178 encoder->base.description = algodef->algorithm_description;
180 for (; fns->function_id != 0; fns++) {
181 switch (fns->function_id) {
182 case OSSL_FUNC_ENCODER_NEWCTX:
183 if (encoder->newctx == NULL)
185 OSSL_FUNC_encoder_newctx(fns);
187 case OSSL_FUNC_ENCODER_FREECTX:
188 if (encoder->freectx == NULL)
190 OSSL_FUNC_encoder_freectx(fns);
192 case OSSL_FUNC_ENCODER_GET_PARAMS:
193 if (encoder->get_params == NULL)
194 encoder->get_params =
195 OSSL_FUNC_encoder_get_params(fns);
197 case OSSL_FUNC_ENCODER_GETTABLE_PARAMS:
198 if (encoder->gettable_params == NULL)
199 encoder->gettable_params =
200 OSSL_FUNC_encoder_gettable_params(fns);
202 case OSSL_FUNC_ENCODER_SET_CTX_PARAMS:
203 if (encoder->set_ctx_params == NULL)
204 encoder->set_ctx_params =
205 OSSL_FUNC_encoder_set_ctx_params(fns);
207 case OSSL_FUNC_ENCODER_SETTABLE_CTX_PARAMS:
208 if (encoder->settable_ctx_params == NULL)
209 encoder->settable_ctx_params =
210 OSSL_FUNC_encoder_settable_ctx_params(fns);
212 case OSSL_FUNC_ENCODER_DOES_SELECTION:
213 if (encoder->does_selection == NULL)
214 encoder->does_selection =
215 OSSL_FUNC_encoder_does_selection(fns);
217 case OSSL_FUNC_ENCODER_ENCODE:
218 if (encoder->encode == NULL)
219 encoder->encode = OSSL_FUNC_encoder_encode(fns);
221 case OSSL_FUNC_ENCODER_IMPORT_OBJECT:
222 if (encoder->import_object == NULL)
223 encoder->import_object =
224 OSSL_FUNC_encoder_import_object(fns);
226 case OSSL_FUNC_ENCODER_FREE_OBJECT:
227 if (encoder->free_object == NULL)
228 encoder->free_object =
229 OSSL_FUNC_encoder_free_object(fns);
234 * Try to check that the method is sensible.
235 * If you have a constructor, you must have a destructor and vice versa.
236 * You must have the encoding driver functions.
238 if (!((encoder->newctx == NULL && encoder->freectx == NULL)
239 || (encoder->newctx != NULL && encoder->freectx != NULL)
240 || (encoder->import_object != NULL && encoder->free_object != NULL)
241 || (encoder->import_object == NULL && encoder->free_object == NULL))
242 || encoder->encode == NULL
243 || encoder->gettable_params == NULL
244 || encoder->get_params == NULL) {
245 OSSL_ENCODER_free(encoder);
246 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_INVALID_PROVIDER_FUNCTIONS);
250 if (prov != NULL && !ossl_provider_up_ref(prov)) {
251 OSSL_ENCODER_free(encoder);
255 encoder->base.prov = prov;
261 * The core fetching functionality passes the names of the implementation.
262 * This function is responsible to getting an identity number for them,
263 * then call encoder_from_algorithm() with that identity number.
265 static void *construct_encoder(const OSSL_ALGORITHM *algodef,
266 OSSL_PROVIDER *prov, void *data)
269 * This function is only called if get_encoder_from_store() returned
270 * NULL, so it's safe to say that of all the spots to create a new
271 * namemap entry, this is it. Should the name already exist there, we
272 * know that ossl_namemap_add() will return its corresponding number.
274 struct encoder_data_st *methdata = data;
275 OSSL_LIB_CTX *libctx = ossl_provider_libctx(prov);
276 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
277 const char *names = algodef->algorithm_names;
278 int id = ossl_namemap_add_names(namemap, 0, names, NAME_SEPARATOR);
282 method = encoder_from_algorithm(id, algodef, prov);
285 * Flag to indicate that there was actual construction errors. This
286 * helps inner_evp_generic_fetch() determine what error it should
287 * record on inaccessible algorithms.
290 methdata->flag_construct_error_occurred = 1;
295 /* Intermediary function to avoid ugly casts, used below */
296 static void destruct_encoder(void *method, void *data)
298 OSSL_ENCODER_free(method);
301 static int up_ref_encoder(void *method)
303 return OSSL_ENCODER_up_ref(method);
306 static void free_encoder(void *method)
308 OSSL_ENCODER_free(method);
311 /* Fetching support. Can fetch by numeric identity or by name */
312 static OSSL_ENCODER *inner_ossl_encoder_fetch(OSSL_LIB_CTX *libctx,
313 int id, const char *name,
314 const char *properties)
316 OSSL_METHOD_STORE *store = get_encoder_store(libctx);
317 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
321 if (store == NULL || namemap == NULL) {
322 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_INVALID_ARGUMENT);
327 * If we have been passed neither a name_id or a name, we have an
328 * internal programming error.
330 if (!ossl_assert(id != 0 || name != NULL)) {
331 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_INTERNAL_ERROR);
336 id = ossl_namemap_name2num(namemap, name);
339 * If we haven't found the name yet, chances are that the algorithm to
340 * be fetched is unsupported.
346 || !ossl_method_store_cache_get(store, id, properties, &method)) {
347 OSSL_METHOD_CONSTRUCT_METHOD mcm = {
348 alloc_tmp_encoder_store,
349 dealloc_tmp_encoder_store,
350 get_encoder_from_store,
351 put_encoder_in_store,
355 struct encoder_data_st mcmdata;
357 mcmdata.libctx = libctx;
360 mcmdata.names = name;
361 mcmdata.propquery = properties;
362 mcmdata.flag_construct_error_occurred = 0;
363 if ((method = ossl_method_construct(libctx, OSSL_OP_ENCODER,
364 0 /* !force_cache */,
365 &mcm, &mcmdata)) != NULL) {
367 * If construction did create a method for us, we know that
368 * there is a correct name_id and meth_id, since those have
369 * already been calculated in get_encoder_from_store() and
370 * put_encoder_in_store() above.
373 id = ossl_namemap_name2num(namemap, name);
374 ossl_method_store_cache_set(store, id, properties, method,
375 up_ref_encoder, free_encoder);
379 * If we never were in the constructor, the algorithm to be fetched
382 unsupported = !mcmdata.flag_construct_error_occurred;
385 if (method == NULL) {
386 int code = unsupported ? ERR_R_UNSUPPORTED : ERR_R_FETCH_FAILED;
389 name = ossl_namemap_num2name(namemap, id, 0);
390 ERR_raise_data(ERR_LIB_OSSL_ENCODER, code,
391 "%s, Name (%s : %d), Properties (%s)",
392 ossl_lib_ctx_get_descriptor(libctx),
393 name = NULL ? "<null>" : name, id,
394 properties == NULL ? "<null>" : properties);
400 OSSL_ENCODER *OSSL_ENCODER_fetch(OSSL_LIB_CTX *libctx, const char *name,
401 const char *properties)
403 return inner_ossl_encoder_fetch(libctx, 0, name, properties);
406 OSSL_ENCODER *ossl_encoder_fetch_by_number(OSSL_LIB_CTX *libctx, int id,
407 const char *properties)
409 return inner_ossl_encoder_fetch(libctx, id, NULL, properties);
413 * Library of basic method functions
416 const OSSL_PROVIDER *OSSL_ENCODER_get0_provider(const OSSL_ENCODER *encoder)
418 if (!ossl_assert(encoder != NULL)) {
419 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
423 return encoder->base.prov;
426 const char *OSSL_ENCODER_get0_properties(const OSSL_ENCODER *encoder)
428 if (!ossl_assert(encoder != NULL)) {
429 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
433 return encoder->base.propdef;
436 int OSSL_ENCODER_get_number(const OSSL_ENCODER *encoder)
438 if (!ossl_assert(encoder != NULL)) {
439 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
443 return encoder->base.id;
446 const char *OSSL_ENCODER_get0_name(const OSSL_ENCODER *encoder)
448 return encoder->base.name;
451 const char *OSSL_ENCODER_get0_description(const OSSL_ENCODER *encoder)
453 return encoder->base.description;
456 int OSSL_ENCODER_is_a(const OSSL_ENCODER *encoder, const char *name)
458 if (encoder->base.prov != NULL) {
459 OSSL_LIB_CTX *libctx = ossl_provider_libctx(encoder->base.prov);
460 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
462 return ossl_namemap_name2num(namemap, name) == encoder->base.id;
467 struct encoder_do_all_data_st {
468 void (*user_fn)(void *method, void *arg);
472 static void encoder_do_one(OSSL_PROVIDER *provider,
473 const OSSL_ALGORITHM *algodef,
474 int no_store, void *vdata)
476 struct encoder_do_all_data_st *data = vdata;
477 OSSL_LIB_CTX *libctx = ossl_provider_libctx(provider);
478 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
479 const char *names = algodef->algorithm_names;
480 int id = ossl_namemap_add_names(namemap, 0, names, NAME_SEPARATOR);
485 encoder_from_algorithm(id, algodef, provider);
487 if (method != NULL) {
488 data->user_fn(method, data->user_arg);
489 OSSL_ENCODER_free(method);
493 void OSSL_ENCODER_do_all_provided(OSSL_LIB_CTX *libctx,
494 void (*fn)(OSSL_ENCODER *encoder, void *arg),
497 struct encoder_do_all_data_st data;
499 data.user_fn = (void (*)(void *, void *))fn;
503 * No pre- or post-condition for this call, as this only creates methods
504 * temporarly and then promptly destroys them.
506 ossl_algorithm_do_all(libctx, OSSL_OP_ENCODER, NULL, NULL,
507 encoder_do_one, NULL, &data);
510 int OSSL_ENCODER_names_do_all(const OSSL_ENCODER *encoder,
511 void (*fn)(const char *name, void *data),
517 if (encoder->base.prov != NULL) {
518 OSSL_LIB_CTX *libctx = ossl_provider_libctx(encoder->base.prov);
519 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
521 return ossl_namemap_doall_names(namemap, encoder->base.id, fn, data);
528 OSSL_ENCODER_gettable_params(OSSL_ENCODER *encoder)
530 if (encoder != NULL && encoder->gettable_params != NULL) {
531 void *provctx = ossl_provider_ctx(OSSL_ENCODER_get0_provider(encoder));
533 return encoder->gettable_params(provctx);
538 int OSSL_ENCODER_get_params(OSSL_ENCODER *encoder, OSSL_PARAM params[])
540 if (encoder != NULL && encoder->get_params != NULL)
541 return encoder->get_params(params);
545 const OSSL_PARAM *OSSL_ENCODER_settable_ctx_params(OSSL_ENCODER *encoder)
547 if (encoder != NULL && encoder->settable_ctx_params != NULL) {
548 void *provctx = ossl_provider_ctx(OSSL_ENCODER_get0_provider(encoder));
550 return encoder->settable_ctx_params(provctx);
556 * Encoder context support
559 OSSL_ENCODER_CTX *OSSL_ENCODER_CTX_new(void)
561 OSSL_ENCODER_CTX *ctx;
563 if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) == NULL)
564 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_MALLOC_FAILURE);
569 int OSSL_ENCODER_CTX_set_params(OSSL_ENCODER_CTX *ctx,
570 const OSSL_PARAM params[])
576 if (!ossl_assert(ctx != NULL)) {
577 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
581 if (ctx->encoder_insts == NULL)
584 l = OSSL_ENCODER_CTX_get_num_encoders(ctx);
585 for (i = 0; i < l; i++) {
586 OSSL_ENCODER_INSTANCE *encoder_inst =
587 sk_OSSL_ENCODER_INSTANCE_value(ctx->encoder_insts, i);
588 OSSL_ENCODER *encoder = OSSL_ENCODER_INSTANCE_get_encoder(encoder_inst);
589 void *encoderctx = OSSL_ENCODER_INSTANCE_get_encoder_ctx(encoder_inst);
591 if (encoderctx == NULL || encoder->set_ctx_params == NULL)
593 if (!encoder->set_ctx_params(encoderctx, params))
599 void OSSL_ENCODER_CTX_free(OSSL_ENCODER_CTX *ctx)
602 sk_OSSL_ENCODER_INSTANCE_pop_free(ctx->encoder_insts,
603 ossl_encoder_instance_free);
604 OPENSSL_free(ctx->construct_data);
605 ossl_pw_clear_passphrase_data(&ctx->pwdata);