2 * Copyright 2019-2020 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() */
93 * Generic routines to fetch / create ENCODER methods with
94 * ossl_method_construct()
97 /* Temporary encoder method store, constructor and destructor */
98 static void *alloc_tmp_encoder_store(OSSL_LIB_CTX *ctx)
100 return ossl_method_store_new(ctx);
103 static void dealloc_tmp_encoder_store(void *store)
106 ossl_method_store_free(store);
109 /* Get the permanent encoder store */
110 static OSSL_METHOD_STORE *get_encoder_store(OSSL_LIB_CTX *libctx)
112 return ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_ENCODER_STORE_INDEX,
113 &encoder_store_method);
116 /* Get encoder methods from a store, or put one in */
117 static void *get_encoder_from_store(OSSL_LIB_CTX *libctx, void *store,
120 struct encoder_data_st *methdata = data;
124 if ((id = methdata->id) == 0) {
125 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
127 id = ossl_namemap_name2num(namemap, methdata->names);
131 && (store = get_encoder_store(libctx)) == NULL)
134 if (!ossl_method_store_fetch(store, id, methdata->propquery, &method))
139 static int put_encoder_in_store(OSSL_LIB_CTX *libctx, void *store,
140 void *method, const OSSL_PROVIDER *prov,
141 int operation_id, const char *names,
142 const char *propdef, void *unused)
144 OSSL_NAMEMAP *namemap;
147 if ((namemap = ossl_namemap_stored(libctx)) == NULL
148 || (id = ossl_namemap_name2num(namemap, names)) == 0)
151 if (store == NULL && (store = get_encoder_store(libctx)) == NULL)
154 return ossl_method_store_add(store, prov, id, propdef, method,
155 (int (*)(void *))OSSL_ENCODER_up_ref,
156 (void (*)(void *))OSSL_ENCODER_free);
159 /* Create and populate a encoder method */
160 static void *encoder_from_dispatch(int id, const OSSL_ALGORITHM *algodef,
163 OSSL_ENCODER *encoder = NULL;
164 const OSSL_DISPATCH *fns = algodef->implementation;
166 if ((encoder = ossl_encoder_new()) == NULL)
168 encoder->base.id = id;
169 encoder->base.propdef = algodef->property_definition;
171 for (; fns->function_id != 0; fns++) {
172 switch (fns->function_id) {
173 case OSSL_FUNC_ENCODER_NEWCTX:
174 if (encoder->newctx == NULL)
176 OSSL_FUNC_encoder_newctx(fns);
178 case OSSL_FUNC_ENCODER_FREECTX:
179 if (encoder->freectx == NULL)
181 OSSL_FUNC_encoder_freectx(fns);
183 case OSSL_FUNC_ENCODER_GET_PARAMS:
184 if (encoder->get_params == NULL)
185 encoder->get_params =
186 OSSL_FUNC_encoder_get_params(fns);
188 case OSSL_FUNC_ENCODER_GETTABLE_PARAMS:
189 if (encoder->gettable_params == NULL)
190 encoder->gettable_params =
191 OSSL_FUNC_encoder_gettable_params(fns);
193 case OSSL_FUNC_ENCODER_SET_CTX_PARAMS:
194 if (encoder->set_ctx_params == NULL)
195 encoder->set_ctx_params =
196 OSSL_FUNC_encoder_set_ctx_params(fns);
198 case OSSL_FUNC_ENCODER_SETTABLE_CTX_PARAMS:
199 if (encoder->settable_ctx_params == NULL)
200 encoder->settable_ctx_params =
201 OSSL_FUNC_encoder_settable_ctx_params(fns);
203 case OSSL_FUNC_ENCODER_ENCODE:
204 if (encoder->encode == NULL)
205 encoder->encode = OSSL_FUNC_encoder_encode(fns);
207 case OSSL_FUNC_ENCODER_IMPORT_OBJECT:
208 if (encoder->import_object == NULL)
209 encoder->import_object =
210 OSSL_FUNC_encoder_import_object(fns);
212 case OSSL_FUNC_ENCODER_FREE_OBJECT:
213 if (encoder->free_object == NULL)
214 encoder->free_object =
215 OSSL_FUNC_encoder_free_object(fns);
220 * Try to check that the method is sensible.
221 * If you have a constructor, you must have a destructor and vice versa.
222 * You must have the encoding driver functions.
224 if (!((encoder->newctx == NULL && encoder->freectx == NULL)
225 || (encoder->newctx != NULL && encoder->freectx != NULL)
226 || (encoder->import_object != NULL && encoder->free_object != NULL)
227 || (encoder->import_object == NULL && encoder->free_object == NULL))
228 || encoder->encode == NULL
229 || encoder->gettable_params == NULL
230 || encoder->get_params == NULL) {
231 OSSL_ENCODER_free(encoder);
232 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_INVALID_PROVIDER_FUNCTIONS);
236 if (prov != NULL && !ossl_provider_up_ref(prov)) {
237 OSSL_ENCODER_free(encoder);
241 encoder->base.prov = prov;
247 * The core fetching functionality passes the names of the implementation.
248 * This function is responsible to getting an identity number for them,
249 * then call encoder_from_dispatch() with that identity number.
251 static void *construct_encoder(const OSSL_ALGORITHM *algodef,
252 OSSL_PROVIDER *prov, void *unused)
255 * This function is only called if get_encoder_from_store() returned
256 * NULL, so it's safe to say that of all the spots to create a new
257 * namemap entry, this is it. Should the name already exist there, we
258 * know that ossl_namemap_add() will return its corresponding number.
260 OSSL_LIB_CTX *libctx = ossl_provider_library_context(prov);
261 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
262 const char *names = algodef->algorithm_names;
263 int id = ossl_namemap_add_names(namemap, 0, names, NAME_SEPARATOR);
267 method = encoder_from_dispatch(id, algodef, prov);
272 /* Intermediary function to avoid ugly casts, used below */
273 static void destruct_encoder(void *method, void *data)
275 OSSL_ENCODER_free(method);
278 static int up_ref_encoder(void *method)
280 return OSSL_ENCODER_up_ref(method);
283 static void free_encoder(void *method)
285 OSSL_ENCODER_free(method);
288 /* Fetching support. Can fetch by numeric identity or by name */
289 static OSSL_ENCODER *inner_ossl_encoder_fetch(OSSL_LIB_CTX *libctx,
290 int id, const char *name,
291 const char *properties)
293 OSSL_METHOD_STORE *store = get_encoder_store(libctx);
294 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
297 if (store == NULL || namemap == NULL)
301 * If we have been passed neither a name_id or a name, we have an
302 * internal programming error.
304 if (!ossl_assert(id != 0 || name != NULL))
308 id = ossl_namemap_name2num(namemap, name);
311 || !ossl_method_store_cache_get(store, id, properties, &method)) {
312 OSSL_METHOD_CONSTRUCT_METHOD mcm = {
313 alloc_tmp_encoder_store,
314 dealloc_tmp_encoder_store,
315 get_encoder_from_store,
316 put_encoder_in_store,
320 struct encoder_data_st mcmdata;
322 mcmdata.libctx = libctx;
325 mcmdata.names = name;
326 mcmdata.propquery = properties;
327 if ((method = ossl_method_construct(libctx, OSSL_OP_ENCODER,
328 0 /* !force_cache */,
329 &mcm, &mcmdata)) != NULL) {
331 * If construction did create a method for us, we know that
332 * there is a correct name_id and meth_id, since those have
333 * already been calculated in get_encoder_from_store() and
334 * put_encoder_in_store() above.
337 id = ossl_namemap_name2num(namemap, name);
338 ossl_method_store_cache_set(store, id, properties, method,
339 up_ref_encoder, free_encoder);
346 OSSL_ENCODER *OSSL_ENCODER_fetch(OSSL_LIB_CTX *libctx, const char *name,
347 const char *properties)
349 return inner_ossl_encoder_fetch(libctx, 0, name, properties);
352 OSSL_ENCODER *ossl_encoder_fetch_by_number(OSSL_LIB_CTX *libctx, int id,
353 const char *properties)
355 return inner_ossl_encoder_fetch(libctx, id, NULL, properties);
359 * Library of basic method functions
362 const OSSL_PROVIDER *OSSL_ENCODER_provider(const OSSL_ENCODER *encoder)
364 if (!ossl_assert(encoder != NULL)) {
365 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
369 return encoder->base.prov;
372 const char *OSSL_ENCODER_properties(const OSSL_ENCODER *encoder)
374 if (!ossl_assert(encoder != NULL)) {
375 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
379 return encoder->base.propdef;
382 int OSSL_ENCODER_number(const OSSL_ENCODER *encoder)
384 if (!ossl_assert(encoder != NULL)) {
385 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
389 return encoder->base.id;
392 int OSSL_ENCODER_is_a(const OSSL_ENCODER *encoder, const char *name)
394 if (encoder->base.prov != NULL) {
395 OSSL_LIB_CTX *libctx = ossl_provider_library_context(encoder->base.prov);
396 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
398 return ossl_namemap_name2num(namemap, name) == encoder->base.id;
403 struct encoder_do_all_data_st {
404 void (*user_fn)(void *method, void *arg);
408 static void encoder_do_one(OSSL_PROVIDER *provider,
409 const OSSL_ALGORITHM *algodef,
410 int no_store, void *vdata)
412 struct encoder_do_all_data_st *data = vdata;
413 OSSL_LIB_CTX *libctx = ossl_provider_library_context(provider);
414 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
415 const char *names = algodef->algorithm_names;
416 int id = ossl_namemap_add_names(namemap, 0, names, NAME_SEPARATOR);
421 encoder_from_dispatch(id, algodef, provider);
423 if (method != NULL) {
424 data->user_fn(method, data->user_arg);
425 OSSL_ENCODER_free(method);
429 void OSSL_ENCODER_do_all_provided(OSSL_LIB_CTX *libctx,
430 void (*fn)(OSSL_ENCODER *encoder, void *arg),
433 struct encoder_do_all_data_st data;
435 data.user_fn = (void (*)(void *, void *))fn;
439 * No pre- or post-condition for this call, as this only creates methods
440 * temporarly and then promptly destroys them.
442 ossl_algorithm_do_all(libctx, OSSL_OP_ENCODER, NULL, NULL,
443 encoder_do_one, NULL, &data);
446 void OSSL_ENCODER_names_do_all(const OSSL_ENCODER *encoder,
447 void (*fn)(const char *name, void *data),
453 if (encoder->base.prov != NULL) {
454 OSSL_LIB_CTX *libctx = ossl_provider_library_context(encoder->base.prov);
455 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
457 ossl_namemap_doall_names(namemap, encoder->base.id, fn, data);
462 OSSL_ENCODER_gettable_params(OSSL_ENCODER *encoder)
464 if (encoder != NULL && encoder->gettable_params != NULL) {
465 void *provctx = ossl_provider_ctx(OSSL_ENCODER_provider(encoder));
467 return encoder->gettable_params(provctx);
472 int OSSL_ENCODER_get_params(OSSL_ENCODER *encoder, OSSL_PARAM params[])
474 if (encoder != NULL && encoder->get_params != NULL)
475 return encoder->get_params(params);
479 const OSSL_PARAM *OSSL_ENCODER_settable_ctx_params(OSSL_ENCODER *encoder)
481 if (encoder != NULL && encoder->settable_ctx_params != NULL) {
482 void *provctx = ossl_provider_ctx(OSSL_ENCODER_provider(encoder));
484 return encoder->settable_ctx_params(provctx);
490 * Encoder context support
493 OSSL_ENCODER_CTX *OSSL_ENCODER_CTX_new(void)
495 OSSL_ENCODER_CTX *ctx;
497 if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) == NULL)
498 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_MALLOC_FAILURE);
503 int OSSL_ENCODER_CTX_set_params(OSSL_ENCODER_CTX *ctx,
504 const OSSL_PARAM params[])
509 if (!ossl_assert(ctx != NULL)) {
510 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
514 if (ctx->encoder_insts == NULL)
517 l = OSSL_ENCODER_CTX_get_num_encoders(ctx);
518 for (i = 0; i < l; i++) {
519 OSSL_ENCODER_INSTANCE *encoder_inst =
520 sk_OSSL_ENCODER_INSTANCE_value(ctx->encoder_insts, i);
521 OSSL_ENCODER *encoder = OSSL_ENCODER_INSTANCE_get_encoder(encoder_inst);
522 void *encoderctx = OSSL_ENCODER_INSTANCE_get_encoder_ctx(encoder_inst);
524 if (encoderctx == NULL || encoder->set_ctx_params == NULL)
526 if (!encoder->set_ctx_params(encoderctx, params))
532 void OSSL_ENCODER_CTX_free(OSSL_ENCODER_CTX *ctx)
535 sk_OSSL_ENCODER_INSTANCE_pop_free(ctx->encoder_insts,
536 ossl_encoder_instance_free);
537 OPENSSL_free(ctx->construct_data);
538 ossl_pw_clear_passphrase_data(&ctx->pwdata);