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_DOES_SELECTION:
204 if (encoder->does_selection == NULL)
205 encoder->does_selection =
206 OSSL_FUNC_encoder_does_selection(fns);
208 case OSSL_FUNC_ENCODER_ENCODE:
209 if (encoder->encode == NULL)
210 encoder->encode = OSSL_FUNC_encoder_encode(fns);
212 case OSSL_FUNC_ENCODER_IMPORT_OBJECT:
213 if (encoder->import_object == NULL)
214 encoder->import_object =
215 OSSL_FUNC_encoder_import_object(fns);
217 case OSSL_FUNC_ENCODER_FREE_OBJECT:
218 if (encoder->free_object == NULL)
219 encoder->free_object =
220 OSSL_FUNC_encoder_free_object(fns);
225 * Try to check that the method is sensible.
226 * If you have a constructor, you must have a destructor and vice versa.
227 * You must have the encoding driver functions.
229 if (!((encoder->newctx == NULL && encoder->freectx == NULL)
230 || (encoder->newctx != NULL && encoder->freectx != NULL)
231 || (encoder->import_object != NULL && encoder->free_object != NULL)
232 || (encoder->import_object == NULL && encoder->free_object == NULL))
233 || encoder->encode == NULL
234 || encoder->gettable_params == NULL
235 || encoder->get_params == NULL) {
236 OSSL_ENCODER_free(encoder);
237 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_INVALID_PROVIDER_FUNCTIONS);
241 if (prov != NULL && !ossl_provider_up_ref(prov)) {
242 OSSL_ENCODER_free(encoder);
246 encoder->base.prov = prov;
252 * The core fetching functionality passes the names of the implementation.
253 * This function is responsible to getting an identity number for them,
254 * then call encoder_from_dispatch() with that identity number.
256 static void *construct_encoder(const OSSL_ALGORITHM *algodef,
257 OSSL_PROVIDER *prov, void *unused)
260 * This function is only called if get_encoder_from_store() returned
261 * NULL, so it's safe to say that of all the spots to create a new
262 * namemap entry, this is it. Should the name already exist there, we
263 * know that ossl_namemap_add() will return its corresponding number.
265 OSSL_LIB_CTX *libctx = ossl_provider_libctx(prov);
266 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
267 const char *names = algodef->algorithm_names;
268 int id = ossl_namemap_add_names(namemap, 0, names, NAME_SEPARATOR);
272 method = encoder_from_dispatch(id, algodef, prov);
277 /* Intermediary function to avoid ugly casts, used below */
278 static void destruct_encoder(void *method, void *data)
280 OSSL_ENCODER_free(method);
283 static int up_ref_encoder(void *method)
285 return OSSL_ENCODER_up_ref(method);
288 static void free_encoder(void *method)
290 OSSL_ENCODER_free(method);
293 /* Fetching support. Can fetch by numeric identity or by name */
294 static OSSL_ENCODER *inner_ossl_encoder_fetch(OSSL_LIB_CTX *libctx,
295 int id, const char *name,
296 const char *properties)
298 OSSL_METHOD_STORE *store = get_encoder_store(libctx);
299 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
302 if (store == NULL || namemap == NULL)
306 * If we have been passed neither a name_id or a name, we have an
307 * internal programming error.
309 if (!ossl_assert(id != 0 || name != NULL))
313 id = ossl_namemap_name2num(namemap, name);
316 || !ossl_method_store_cache_get(store, id, properties, &method)) {
317 OSSL_METHOD_CONSTRUCT_METHOD mcm = {
318 alloc_tmp_encoder_store,
319 dealloc_tmp_encoder_store,
320 get_encoder_from_store,
321 put_encoder_in_store,
325 struct encoder_data_st mcmdata;
327 mcmdata.libctx = libctx;
330 mcmdata.names = name;
331 mcmdata.propquery = properties;
332 if ((method = ossl_method_construct(libctx, OSSL_OP_ENCODER,
333 0 /* !force_cache */,
334 &mcm, &mcmdata)) != NULL) {
336 * If construction did create a method for us, we know that
337 * there is a correct name_id and meth_id, since those have
338 * already been calculated in get_encoder_from_store() and
339 * put_encoder_in_store() above.
342 id = ossl_namemap_name2num(namemap, name);
343 ossl_method_store_cache_set(store, id, properties, method,
344 up_ref_encoder, free_encoder);
351 OSSL_ENCODER *OSSL_ENCODER_fetch(OSSL_LIB_CTX *libctx, const char *name,
352 const char *properties)
354 return inner_ossl_encoder_fetch(libctx, 0, name, properties);
357 OSSL_ENCODER *ossl_encoder_fetch_by_number(OSSL_LIB_CTX *libctx, int id,
358 const char *properties)
360 return inner_ossl_encoder_fetch(libctx, id, NULL, properties);
364 * Library of basic method functions
367 const OSSL_PROVIDER *OSSL_ENCODER_provider(const OSSL_ENCODER *encoder)
369 if (!ossl_assert(encoder != NULL)) {
370 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
374 return encoder->base.prov;
377 const char *OSSL_ENCODER_properties(const OSSL_ENCODER *encoder)
379 if (!ossl_assert(encoder != NULL)) {
380 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
384 return encoder->base.propdef;
387 int OSSL_ENCODER_number(const OSSL_ENCODER *encoder)
389 if (!ossl_assert(encoder != NULL)) {
390 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
394 return encoder->base.id;
397 int OSSL_ENCODER_is_a(const OSSL_ENCODER *encoder, const char *name)
399 if (encoder->base.prov != NULL) {
400 OSSL_LIB_CTX *libctx = ossl_provider_libctx(encoder->base.prov);
401 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
403 return ossl_namemap_name2num(namemap, name) == encoder->base.id;
408 struct encoder_do_all_data_st {
409 void (*user_fn)(void *method, void *arg);
413 static void encoder_do_one(OSSL_PROVIDER *provider,
414 const OSSL_ALGORITHM *algodef,
415 int no_store, void *vdata)
417 struct encoder_do_all_data_st *data = vdata;
418 OSSL_LIB_CTX *libctx = ossl_provider_libctx(provider);
419 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
420 const char *names = algodef->algorithm_names;
421 int id = ossl_namemap_add_names(namemap, 0, names, NAME_SEPARATOR);
426 encoder_from_dispatch(id, algodef, provider);
428 if (method != NULL) {
429 data->user_fn(method, data->user_arg);
430 OSSL_ENCODER_free(method);
434 void OSSL_ENCODER_do_all_provided(OSSL_LIB_CTX *libctx,
435 void (*fn)(OSSL_ENCODER *encoder, void *arg),
438 struct encoder_do_all_data_st data;
440 data.user_fn = (void (*)(void *, void *))fn;
444 * No pre- or post-condition for this call, as this only creates methods
445 * temporarly and then promptly destroys them.
447 ossl_algorithm_do_all(libctx, OSSL_OP_ENCODER, NULL, NULL,
448 encoder_do_one, NULL, &data);
451 void OSSL_ENCODER_names_do_all(const OSSL_ENCODER *encoder,
452 void (*fn)(const char *name, void *data),
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 ossl_namemap_doall_names(namemap, encoder->base.id, fn, data);
467 OSSL_ENCODER_gettable_params(OSSL_ENCODER *encoder)
469 if (encoder != NULL && encoder->gettable_params != NULL) {
470 void *provctx = ossl_provider_ctx(OSSL_ENCODER_provider(encoder));
472 return encoder->gettable_params(provctx);
477 int OSSL_ENCODER_get_params(OSSL_ENCODER *encoder, OSSL_PARAM params[])
479 if (encoder != NULL && encoder->get_params != NULL)
480 return encoder->get_params(params);
484 const OSSL_PARAM *OSSL_ENCODER_settable_ctx_params(OSSL_ENCODER *encoder)
486 if (encoder != NULL && encoder->settable_ctx_params != NULL) {
487 void *provctx = ossl_provider_ctx(OSSL_ENCODER_provider(encoder));
489 return encoder->settable_ctx_params(provctx);
495 * Encoder context support
498 OSSL_ENCODER_CTX *OSSL_ENCODER_CTX_new(void)
500 OSSL_ENCODER_CTX *ctx;
502 if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) == NULL)
503 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_MALLOC_FAILURE);
508 int OSSL_ENCODER_CTX_set_params(OSSL_ENCODER_CTX *ctx,
509 const OSSL_PARAM params[])
515 if (!ossl_assert(ctx != NULL)) {
516 ERR_raise(ERR_LIB_OSSL_ENCODER, ERR_R_PASSED_NULL_PARAMETER);
520 if (ctx->encoder_insts == NULL)
523 l = OSSL_ENCODER_CTX_get_num_encoders(ctx);
524 for (i = 0; i < l; i++) {
525 OSSL_ENCODER_INSTANCE *encoder_inst =
526 sk_OSSL_ENCODER_INSTANCE_value(ctx->encoder_insts, i);
527 OSSL_ENCODER *encoder = OSSL_ENCODER_INSTANCE_get_encoder(encoder_inst);
528 void *encoderctx = OSSL_ENCODER_INSTANCE_get_encoder_ctx(encoder_inst);
530 if (encoderctx == NULL || encoder->set_ctx_params == NULL)
532 if (!encoder->set_ctx_params(encoderctx, params))
538 void OSSL_ENCODER_CTX_free(OSSL_ENCODER_CTX *ctx)
541 sk_OSSL_ENCODER_INSTANCE_pop_free(ctx->encoder_insts,
542 ossl_encoder_instance_free);
543 OPENSSL_free(ctx->construct_data);
544 ossl_pw_clear_passphrase_data(&ctx->pwdata);