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a16d21744d
Where an object has multiple ex_data associated with it, then we free that ex_data in order of priority (high priority first). Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/14991)
132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
/*
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* Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
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* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <string.h>
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#include <openssl/err.h>
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#include <openssl/lhash.h>
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#include "internal/propertyerr.h"
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#include "internal/property.h"
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#include "internal/core.h"
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#include "property_local.h"
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/*
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* Implement a property definition cache.
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* These functions assume that they are called under a write lock.
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* No attempt is made to clean out the cache, except when it is shut down.
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*/
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typedef struct {
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const char *prop;
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OSSL_PROPERTY_LIST *defn;
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char body[1];
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} PROPERTY_DEFN_ELEM;
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DEFINE_LHASH_OF(PROPERTY_DEFN_ELEM);
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static unsigned long property_defn_hash(const PROPERTY_DEFN_ELEM *a)
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{
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return OPENSSL_LH_strhash(a->prop);
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}
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static int property_defn_cmp(const PROPERTY_DEFN_ELEM *a,
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const PROPERTY_DEFN_ELEM *b)
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{
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return strcmp(a->prop, b->prop);
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}
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static void property_defn_free(PROPERTY_DEFN_ELEM *elem)
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{
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ossl_property_free(elem->defn);
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OPENSSL_free(elem);
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}
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static void property_defns_free(void *vproperty_defns)
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{
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LHASH_OF(PROPERTY_DEFN_ELEM) *property_defns = vproperty_defns;
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if (property_defns != NULL) {
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lh_PROPERTY_DEFN_ELEM_doall(property_defns,
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&property_defn_free);
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lh_PROPERTY_DEFN_ELEM_free(property_defns);
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}
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}
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static void *property_defns_new(OSSL_LIB_CTX *ctx) {
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return lh_PROPERTY_DEFN_ELEM_new(&property_defn_hash, &property_defn_cmp);
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}
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static const OSSL_LIB_CTX_METHOD property_defns_method = {
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OSSL_LIB_CTX_METHOD_DEFAULT_PRIORITY,
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property_defns_new,
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property_defns_free,
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};
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OSSL_PROPERTY_LIST *ossl_prop_defn_get(OSSL_LIB_CTX *ctx, const char *prop)
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{
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PROPERTY_DEFN_ELEM elem, *r;
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LHASH_OF(PROPERTY_DEFN_ELEM) *property_defns;
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property_defns = ossl_lib_ctx_get_data(ctx,
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OSSL_LIB_CTX_PROPERTY_DEFN_INDEX,
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&property_defns_method);
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if (property_defns == NULL || !ossl_lib_ctx_read_lock(ctx))
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return NULL;
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elem.prop = prop;
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r = lh_PROPERTY_DEFN_ELEM_retrieve(property_defns, &elem);
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ossl_lib_ctx_unlock(ctx);
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return r != NULL ? r->defn : NULL;
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}
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int ossl_prop_defn_set(OSSL_LIB_CTX *ctx, const char *prop,
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OSSL_PROPERTY_LIST *pl)
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{
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PROPERTY_DEFN_ELEM elem, *old, *p = NULL;
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size_t len;
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LHASH_OF(PROPERTY_DEFN_ELEM) *property_defns;
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int res = 1;
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property_defns = ossl_lib_ctx_get_data(ctx,
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OSSL_LIB_CTX_PROPERTY_DEFN_INDEX,
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&property_defns_method);
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if (property_defns == NULL)
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return 0;
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if (prop == NULL)
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return 1;
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if (!ossl_lib_ctx_write_lock(ctx))
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return 0;
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if (pl == NULL) {
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elem.prop = prop;
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lh_PROPERTY_DEFN_ELEM_delete(property_defns, &elem);
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goto end;
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}
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len = strlen(prop);
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p = OPENSSL_malloc(sizeof(*p) + len);
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if (p != NULL) {
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p->prop = p->body;
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p->defn = pl;
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memcpy(p->body, prop, len + 1);
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old = lh_PROPERTY_DEFN_ELEM_insert(property_defns, p);
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if (old != NULL) {
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property_defn_free(old);
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goto end;
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}
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if (!lh_PROPERTY_DEFN_ELEM_error(property_defns))
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goto end;
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}
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OPENSSL_free(p);
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res = 0;
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end:
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ossl_lib_ctx_unlock(ctx);
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return res;
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}
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