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- /*
- * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the Apache License 2.0 (the "License"). You may not use
- * this file except in compliance with the License. You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
- #include <stddef.h>
- #include <openssl/ossl_typ.h>
- #include <openssl/evp.h>
- #include <openssl/core.h>
- #include "internal/cryptlib.h"
- #include "internal/thread_once.h"
- #include "internal/asn1_int.h"
- #include "internal/property.h"
- #include "internal/core.h"
- #include "internal/evp_int.h" /* evp_locl.h needs it */
- #include "evp_locl.h"
- static void default_method_store_free(void *vstore)
- {
- ossl_method_store_free(vstore);
- }
- static void *default_method_store_new(OPENSSL_CTX *ctx)
- {
- return ossl_method_store_new(ctx);
- }
- static const OPENSSL_CTX_METHOD default_method_store_method = {
- default_method_store_new,
- default_method_store_free,
- };
- /* Data to be passed through ossl_method_construct() */
- struct method_data_st {
- const char *name;
- int nid;
- OSSL_METHOD_CONSTRUCT_METHOD *mcm;
- void *(*method_from_dispatch)(int nid, const OSSL_DISPATCH *,
- OSSL_PROVIDER *);
- int (*refcnt_up_method)(void *method);
- void (*destruct_method)(void *method);
- int (*nid_method)(void *method);
- };
- /*
- * Generic routines to fetch / create EVP methods with ossl_method_construct()
- */
- static void *alloc_tmp_method_store(OPENSSL_CTX *ctx)
- {
- return ossl_method_store_new(ctx);
- }
- static void dealloc_tmp_method_store(void *store)
- {
- if (store != NULL)
- ossl_method_store_free(store);
- }
- static OSSL_METHOD_STORE *get_default_method_store(OPENSSL_CTX *libctx)
- {
- return openssl_ctx_get_data(libctx, OPENSSL_CTX_DEFAULT_METHOD_STORE_INDEX,
- &default_method_store_method);
- }
- static void *get_method_from_store(OPENSSL_CTX *libctx, void *store,
- const char *propquery, void *data)
- {
- struct method_data_st *methdata = data;
- void *method = NULL;
- if (store == NULL
- && (store = get_default_method_store(libctx)) == NULL)
- return NULL;
- (void)ossl_method_store_fetch(store, methdata->nid, propquery, &method);
- if (method != NULL
- && !methdata->refcnt_up_method(method)) {
- method = NULL;
- }
- return method;
- }
- static int put_method_in_store(OPENSSL_CTX *libctx, void *store,
- const char *propdef,
- void *method, void *data)
- {
- struct method_data_st *methdata = data;
- int nid = methdata->nid_method(method);
- if (nid == NID_undef)
- return 0;
- if (store == NULL
- && (store = get_default_method_store(libctx)) == NULL)
- return 0;
- if (methdata->refcnt_up_method(method)
- && ossl_method_store_add(store, nid, propdef, method,
- methdata->destruct_method))
- return 1;
- return 0;
- }
- static void *construct_method(const char *algorithm_name,
- const OSSL_DISPATCH *fns, OSSL_PROVIDER *prov,
- void *data)
- {
- struct method_data_st *methdata = data;
- void *method = NULL;
- int nid = OBJ_sn2nid(algorithm_name);
- if (nid == NID_undef) {
- /* Create a new NID for that name on the fly */
- ASN1_OBJECT tmpobj;
- /* This is the same as OBJ_create() but without requiring a OID */
- tmpobj.nid = OBJ_new_nid(1);
- tmpobj.sn = tmpobj.ln = methdata->name;
- tmpobj.flags = ASN1_OBJECT_FLAG_DYNAMIC;
- tmpobj.length = 0;
- tmpobj.data = NULL;
- nid = OBJ_add_object(&tmpobj);
- }
- if (nid == NID_undef)
- return NULL;
- method = methdata->method_from_dispatch(nid, fns, prov);
- if (method == NULL)
- return NULL;
- return method;
- }
- static void destruct_method(void *method, void *data)
- {
- struct method_data_st *methdata = data;
- methdata->destruct_method(method);
- }
- void *evp_generic_fetch(OPENSSL_CTX *libctx, int operation_id,
- const char *algorithm, const char *properties,
- void *(*new_method)(int nid, const OSSL_DISPATCH *fns,
- OSSL_PROVIDER *prov),
- int (*upref_method)(void *),
- void (*free_method)(void *),
- int (*nid_method)(void *))
- {
- OSSL_METHOD_STORE *store = get_default_method_store(libctx);
- int nid = OBJ_sn2nid(algorithm);
- void *method = NULL;
- if (store == NULL)
- return NULL;
- if (nid == NID_undef
- || !ossl_method_store_cache_get(store, nid, properties, &method)) {
- OSSL_METHOD_CONSTRUCT_METHOD mcm = {
- alloc_tmp_method_store,
- dealloc_tmp_method_store,
- get_method_from_store,
- put_method_in_store,
- construct_method,
- destruct_method
- };
- struct method_data_st mcmdata;
- mcmdata.nid = nid;
- mcmdata.mcm = &mcm;
- mcmdata.method_from_dispatch = new_method;
- mcmdata.destruct_method = free_method;
- mcmdata.refcnt_up_method = upref_method;
- mcmdata.destruct_method = free_method;
- mcmdata.nid_method = nid_method;
- method = ossl_method_construct(libctx, operation_id, algorithm,
- properties, 0 /* !force_cache */,
- &mcm, &mcmdata);
- ossl_method_store_cache_set(store, nid, properties, method);
- } else {
- upref_method(method);
- }
- return method;
- }
- int EVP_set_default_properties(OPENSSL_CTX *libctx, const char *propq)
- {
- OSSL_METHOD_STORE *store = get_default_method_store(libctx);
- if (store != NULL)
- return ossl_method_store_set_global_properties(store, propq);
- EVPerr(EVP_F_EVP_SET_DEFAULT_PROPERTIES, ERR_R_INTERNAL_ERROR);
- return 0;
- }
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