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- /*
- * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
- * Copyright (c) 2019, Oracle and/or its affiliates. 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 <string.h>
- #include <openssl/err.h>
- #include <openssl/lhash.h>
- #include "internal/propertyerr.h"
- #include "internal/property.h"
- #include "property_lcl.h"
- /*
- * Implement a property definition cache.
- * These functions assume that they are called under a write lock.
- * No attempt is made to clean out the cache, except when it is shut down.
- */
- typedef struct {
- const char *prop;
- OSSL_PROPERTY_LIST *defn;
- char body[1];
- } PROPERTY_DEFN_ELEM;
- DEFINE_LHASH_OF(PROPERTY_DEFN_ELEM);
- static unsigned long property_defn_hash(const PROPERTY_DEFN_ELEM *a)
- {
- return OPENSSL_LH_strhash(a->prop);
- }
- static int property_defn_cmp(const PROPERTY_DEFN_ELEM *a,
- const PROPERTY_DEFN_ELEM *b)
- {
- return strcmp(a->prop, b->prop);
- }
- static void property_defn_free(PROPERTY_DEFN_ELEM *elem)
- {
- ossl_property_free(elem->defn);
- OPENSSL_free(elem);
- }
- static void property_defns_free(void *vproperty_defns)
- {
- LHASH_OF(PROPERTY_DEFN_ELEM) *property_defns = vproperty_defns;
- if (property_defns != NULL) {
- lh_PROPERTY_DEFN_ELEM_doall(property_defns,
- &property_defn_free);
- lh_PROPERTY_DEFN_ELEM_free(property_defns);
- }
- }
- static void *property_defns_new(OPENSSL_CTX *ctx) {
- return lh_PROPERTY_DEFN_ELEM_new(&property_defn_hash, &property_defn_cmp);
- }
- static const OPENSSL_CTX_METHOD property_defns_method = {
- property_defns_new,
- property_defns_free,
- };
- OSSL_PROPERTY_LIST *ossl_prop_defn_get(OPENSSL_CTX *ctx, const char *prop)
- {
- PROPERTY_DEFN_ELEM elem, *r;
- LHASH_OF(PROPERTY_DEFN_ELEM) *property_defns;
- property_defns = openssl_ctx_get_data(ctx, OPENSSL_CTX_PROPERTY_DEFN_INDEX,
- &property_defns_method);
- if (property_defns == NULL)
- return NULL;
- elem.prop = prop;
- r = lh_PROPERTY_DEFN_ELEM_retrieve(property_defns, &elem);
- return r != NULL ? r->defn : NULL;
- }
- int ossl_prop_defn_set(OPENSSL_CTX *ctx, const char *prop,
- OSSL_PROPERTY_LIST *pl)
- {
- PROPERTY_DEFN_ELEM elem, *old, *p = NULL;
- size_t len;
- LHASH_OF(PROPERTY_DEFN_ELEM) *property_defns;
- property_defns = openssl_ctx_get_data(ctx, OPENSSL_CTX_PROPERTY_DEFN_INDEX,
- &property_defns_method);
- if (property_defns == NULL)
- return 0;
- if (prop == NULL)
- return 1;
- if (pl == NULL) {
- elem.prop = prop;
- lh_PROPERTY_DEFN_ELEM_delete(property_defns, &elem);
- return 1;
- }
- len = strlen(prop);
- p = OPENSSL_malloc(sizeof(*p) + len);
- if (p != NULL) {
- p->prop = p->body;
- p->defn = pl;
- memcpy(p->body, prop, len + 1);
- old = lh_PROPERTY_DEFN_ELEM_insert(property_defns, p);
- if (old != NULL) {
- property_defn_free(old);
- return 1;
- }
- if (!lh_PROPERTY_DEFN_ELEM_error(property_defns))
- return 1;
- }
- OPENSSL_free(p);
- return 0;
- }
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