mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-05 13:33:33 +01:00
771 lines
22 KiB
C
771 lines
22 KiB
C
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/*
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* Copyright 2019-2023 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 <stdio.h>
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#include <stdarg.h>
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#include <openssl/crypto.h>
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#include "internal/core.h"
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#include "internal/property.h"
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#include "internal/provider.h"
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#include "internal/tsan_assist.h"
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#include "crypto/ctype.h"
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#include <openssl/lhash.h>
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#include <openssl/rand.h>
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#include "internal/thread_once.h"
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#include "crypto/lhash.h"
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#include "crypto/sparse_array.h"
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#include "property_local.h"
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/*
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* The number of elements in the query cache before we initiate a flush.
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* If reducing this, also ensure the stochastic test in test/property_test.c
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* isn't likely to fail.
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*/
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#define IMPL_CACHE_FLUSH_THRESHOLD 500
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typedef struct {
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void *method;
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int (*up_ref)(void *);
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void (*free)(void *);
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} METHOD;
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typedef struct {
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const OSSL_PROVIDER *provider;
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OSSL_PROPERTY_LIST *properties;
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METHOD method;
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} IMPLEMENTATION;
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DEFINE_STACK_OF(IMPLEMENTATION)
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typedef struct {
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const OSSL_PROVIDER *provider;
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const char *query;
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METHOD method;
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char body[1];
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} QUERY;
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DEFINE_LHASH_OF(QUERY);
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typedef struct {
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int nid;
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STACK_OF(IMPLEMENTATION) *impls;
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LHASH_OF(QUERY) *cache;
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} ALGORITHM;
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struct ossl_method_store_st {
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OSSL_LIB_CTX *ctx;
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SPARSE_ARRAY_OF(ALGORITHM) *algs;
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/*
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* Lock to protect the |algs| array from concurrent writing, when
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* individual implementations or queries are inserted. This is used
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* by the appropriate functions here.
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*/
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CRYPTO_RWLOCK *lock;
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/*
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* Lock to reserve the whole store. This is used when fetching a set
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* of algorithms, via these functions, found in crypto/core_fetch.c:
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* ossl_method_construct_reserve_store()
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* ossl_method_construct_unreserve_store()
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*/
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CRYPTO_RWLOCK *biglock;
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/* query cache specific values */
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/* Count of the query cache entries for all algs */
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size_t cache_nelem;
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/* Flag: 1 if query cache entries for all algs need flushing */
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int cache_need_flush;
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};
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typedef struct {
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LHASH_OF(QUERY) *cache;
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size_t nelem;
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uint32_t seed;
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unsigned char using_global_seed;
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} IMPL_CACHE_FLUSH;
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DEFINE_SPARSE_ARRAY_OF(ALGORITHM);
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typedef struct ossl_global_properties_st {
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OSSL_PROPERTY_LIST *list;
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#ifndef FIPS_MODULE
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unsigned int no_mirrored : 1;
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#endif
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} OSSL_GLOBAL_PROPERTIES;
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static void ossl_method_cache_flush_alg(OSSL_METHOD_STORE *store,
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ALGORITHM *alg);
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static void ossl_method_cache_flush(OSSL_METHOD_STORE *store, int nid);
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/* Global properties are stored per library context */
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static void ossl_ctx_global_properties_free(void *vglobp)
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{
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OSSL_GLOBAL_PROPERTIES *globp = vglobp;
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if (globp != NULL) {
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ossl_property_free(globp->list);
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OPENSSL_free(globp);
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}
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}
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static void *ossl_ctx_global_properties_new(OSSL_LIB_CTX *ctx)
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{
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return OPENSSL_zalloc(sizeof(OSSL_GLOBAL_PROPERTIES));
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}
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static const OSSL_LIB_CTX_METHOD ossl_ctx_global_properties_method = {
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OSSL_LIB_CTX_METHOD_DEFAULT_PRIORITY,
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ossl_ctx_global_properties_new,
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ossl_ctx_global_properties_free,
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};
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OSSL_PROPERTY_LIST **ossl_ctx_global_properties(OSSL_LIB_CTX *libctx,
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int loadconfig)
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{
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OSSL_GLOBAL_PROPERTIES *globp;
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#ifndef FIPS_MODULE
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if (loadconfig && !OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL))
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return NULL;
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#endif
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globp = ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_GLOBAL_PROPERTIES,
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&ossl_ctx_global_properties_method);
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return globp != NULL ? &globp->list : NULL;
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}
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#ifndef FIPS_MODULE
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int ossl_global_properties_no_mirrored(OSSL_LIB_CTX *libctx)
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{
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OSSL_GLOBAL_PROPERTIES *globp
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= ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_GLOBAL_PROPERTIES,
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&ossl_ctx_global_properties_method);
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return globp != NULL && globp->no_mirrored ? 1 : 0;
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}
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void ossl_global_properties_stop_mirroring(OSSL_LIB_CTX *libctx)
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{
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OSSL_GLOBAL_PROPERTIES *globp
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= ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_GLOBAL_PROPERTIES,
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&ossl_ctx_global_properties_method);
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if (globp != NULL)
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globp->no_mirrored = 1;
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}
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#endif
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static int ossl_method_up_ref(METHOD *method)
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{
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return (*method->up_ref)(method->method);
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}
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static void ossl_method_free(METHOD *method)
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{
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(*method->free)(method->method);
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}
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static __owur int ossl_property_read_lock(OSSL_METHOD_STORE *p)
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{
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return p != NULL ? CRYPTO_THREAD_read_lock(p->lock) : 0;
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}
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static __owur int ossl_property_write_lock(OSSL_METHOD_STORE *p)
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{
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return p != NULL ? CRYPTO_THREAD_write_lock(p->lock) : 0;
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}
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static int ossl_property_unlock(OSSL_METHOD_STORE *p)
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{
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return p != 0 ? CRYPTO_THREAD_unlock(p->lock) : 0;
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}
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static unsigned long query_hash(const QUERY *a)
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{
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return OPENSSL_LH_strhash(a->query);
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}
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static int query_cmp(const QUERY *a, const QUERY *b)
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{
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int res = strcmp(a->query, b->query);
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if (res == 0 && a->provider != NULL && b->provider != NULL)
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res = b->provider > a->provider ? 1
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: b->provider < a->provider ? -1
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: 0;
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return res;
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}
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static void impl_free(IMPLEMENTATION *impl)
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{
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if (impl != NULL) {
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ossl_method_free(&impl->method);
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OPENSSL_free(impl);
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}
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}
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static void impl_cache_free(QUERY *elem)
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{
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if (elem != NULL) {
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ossl_method_free(&elem->method);
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OPENSSL_free(elem);
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}
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}
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static void impl_cache_flush_alg(ossl_uintmax_t idx, ALGORITHM *alg)
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{
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lh_QUERY_doall(alg->cache, &impl_cache_free);
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lh_QUERY_flush(alg->cache);
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}
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static void alg_cleanup(ossl_uintmax_t idx, ALGORITHM *a, void *arg)
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{
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OSSL_METHOD_STORE *store = arg;
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if (a != NULL) {
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sk_IMPLEMENTATION_pop_free(a->impls, &impl_free);
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lh_QUERY_doall(a->cache, &impl_cache_free);
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lh_QUERY_free(a->cache);
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OPENSSL_free(a);
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}
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if (store != NULL)
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ossl_sa_ALGORITHM_set(store->algs, idx, NULL);
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}
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/*
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* The OSSL_LIB_CTX param here allows access to underlying property data needed
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* for computation
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*/
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OSSL_METHOD_STORE *ossl_method_store_new(OSSL_LIB_CTX *ctx)
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{
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OSSL_METHOD_STORE *res;
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res = OPENSSL_zalloc(sizeof(*res));
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if (res != NULL) {
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res->ctx = ctx;
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if ((res->algs = ossl_sa_ALGORITHM_new()) == NULL
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|| (res->lock = CRYPTO_THREAD_lock_new()) == NULL
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|| (res->biglock = CRYPTO_THREAD_lock_new()) == NULL) {
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ossl_method_store_free(res);
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return NULL;
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}
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}
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return res;
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}
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void ossl_method_store_free(OSSL_METHOD_STORE *store)
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{
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if (store != NULL) {
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if (store->algs != NULL)
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ossl_sa_ALGORITHM_doall_arg(store->algs, &alg_cleanup, store);
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ossl_sa_ALGORITHM_free(store->algs);
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CRYPTO_THREAD_lock_free(store->lock);
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CRYPTO_THREAD_lock_free(store->biglock);
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OPENSSL_free(store);
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}
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}
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int ossl_method_lock_store(OSSL_METHOD_STORE *store)
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{
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return store != NULL ? CRYPTO_THREAD_write_lock(store->biglock) : 0;
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}
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int ossl_method_unlock_store(OSSL_METHOD_STORE *store)
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{
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return store != NULL ? CRYPTO_THREAD_unlock(store->biglock) : 0;
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}
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static ALGORITHM *ossl_method_store_retrieve(OSSL_METHOD_STORE *store, int nid)
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{
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return ossl_sa_ALGORITHM_get(store->algs, nid);
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}
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static int ossl_method_store_insert(OSSL_METHOD_STORE *store, ALGORITHM *alg)
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{
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return ossl_sa_ALGORITHM_set(store->algs, alg->nid, alg);
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}
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int ossl_method_store_add(OSSL_METHOD_STORE *store, const OSSL_PROVIDER *prov,
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int nid, const char *properties, void *method,
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int (*method_up_ref)(void *),
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void (*method_destruct)(void *))
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{
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ALGORITHM *alg = NULL;
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IMPLEMENTATION *impl;
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int ret = 0;
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int i;
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if (nid <= 0 || method == NULL || store == NULL)
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return 0;
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if (properties == NULL)
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properties = "";
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if (!ossl_assert(prov != NULL))
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return 0;
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/* Create new entry */
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impl = OPENSSL_malloc(sizeof(*impl));
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if (impl == NULL)
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return 0;
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impl->method.method = method;
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impl->method.up_ref = method_up_ref;
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impl->method.free = method_destruct;
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if (!ossl_method_up_ref(&impl->method)) {
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OPENSSL_free(impl);
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return 0;
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}
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impl->provider = prov;
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/* Insert into the hash table if required */
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if (!ossl_property_write_lock(store)) {
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OPENSSL_free(impl);
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return 0;
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}
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ossl_method_cache_flush(store, nid);
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if ((impl->properties = ossl_prop_defn_get(store->ctx, properties)) == NULL) {
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impl->properties = ossl_parse_property(store->ctx, properties);
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if (impl->properties == NULL)
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goto err;
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if (!ossl_prop_defn_set(store->ctx, properties, &impl->properties)) {
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ossl_property_free(impl->properties);
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impl->properties = NULL;
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goto err;
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}
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}
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alg = ossl_method_store_retrieve(store, nid);
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if (alg == NULL) {
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if ((alg = OPENSSL_zalloc(sizeof(*alg))) == NULL
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|| (alg->impls = sk_IMPLEMENTATION_new_null()) == NULL
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|| (alg->cache = lh_QUERY_new(&query_hash, &query_cmp)) == NULL)
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goto err;
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alg->nid = nid;
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if (!ossl_method_store_insert(store, alg))
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goto err;
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}
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/* Push onto stack if there isn't one there already */
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for (i = 0; i < sk_IMPLEMENTATION_num(alg->impls); i++) {
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const IMPLEMENTATION *tmpimpl = sk_IMPLEMENTATION_value(alg->impls, i);
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if (tmpimpl->provider == impl->provider
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&& tmpimpl->properties == impl->properties)
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break;
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}
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if (i == sk_IMPLEMENTATION_num(alg->impls)
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&& sk_IMPLEMENTATION_push(alg->impls, impl))
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ret = 1;
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ossl_property_unlock(store);
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if (ret == 0)
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impl_free(impl);
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return ret;
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err:
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ossl_property_unlock(store);
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alg_cleanup(0, alg, NULL);
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impl_free(impl);
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return 0;
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}
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int ossl_method_store_remove(OSSL_METHOD_STORE *store, int nid,
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const void *method)
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{
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ALGORITHM *alg = NULL;
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int i;
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if (nid <= 0 || method == NULL || store == NULL)
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return 0;
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if (!ossl_property_write_lock(store))
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return 0;
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ossl_method_cache_flush(store, nid);
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alg = ossl_method_store_retrieve(store, nid);
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if (alg == NULL) {
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ossl_property_unlock(store);
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return 0;
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}
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/*
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* A sorting find then a delete could be faster but these stacks should be
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* relatively small, so we avoid the overhead. Sorting could also surprise
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* users when result orderings change (even though they are not guaranteed).
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*/
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for (i = 0; i < sk_IMPLEMENTATION_num(alg->impls); i++) {
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IMPLEMENTATION *impl = sk_IMPLEMENTATION_value(alg->impls, i);
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if (impl->method.method == method) {
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impl_free(impl);
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(void)sk_IMPLEMENTATION_delete(alg->impls, i);
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ossl_property_unlock(store);
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return 1;
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}
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}
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ossl_property_unlock(store);
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return 0;
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}
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struct alg_cleanup_by_provider_data_st {
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OSSL_METHOD_STORE *store;
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const OSSL_PROVIDER *prov;
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};
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static void
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alg_cleanup_by_provider(ossl_uintmax_t idx, ALGORITHM *alg, void *arg)
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{
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struct alg_cleanup_by_provider_data_st *data = arg;
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int i, count;
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/*
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* We walk the stack backwards, to avoid having to deal with stack shifts
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* caused by deletion
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*/
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for (count = 0, i = sk_IMPLEMENTATION_num(alg->impls); i-- > 0;) {
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IMPLEMENTATION *impl = sk_IMPLEMENTATION_value(alg->impls, i);
|
||
|
|
||
|
if (impl->provider == data->prov) {
|
||
|
impl_free(impl);
|
||
|
(void)sk_IMPLEMENTATION_delete(alg->impls, i);
|
||
|
count++;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* If we removed any implementation, we also clear the whole associated
|
||
|
* cache, 'cause that's the sensible thing to do.
|
||
|
* There's no point flushing the cache entries where we didn't remove
|
||
|
* any implementation, though.
|
||
|
*/
|
||
|
if (count > 0)
|
||
|
ossl_method_cache_flush_alg(data->store, alg);
|
||
|
}
|
||
|
|
||
|
int ossl_method_store_remove_all_provided(OSSL_METHOD_STORE *store,
|
||
|
const OSSL_PROVIDER *prov)
|
||
|
{
|
||
|
struct alg_cleanup_by_provider_data_st data;
|
||
|
|
||
|
if (!ossl_property_write_lock(store))
|
||
|
return 0;
|
||
|
data.prov = prov;
|
||
|
data.store = store;
|
||
|
ossl_sa_ALGORITHM_doall_arg(store->algs, &alg_cleanup_by_provider, &data);
|
||
|
ossl_property_unlock(store);
|
||
|
return 1;
|
||
|
}
|
||
|
|
||
|
static void alg_do_one(ALGORITHM *alg, IMPLEMENTATION *impl,
|
||
|
void (*fn)(int id, void *method, void *fnarg),
|
||
|
void *fnarg)
|
||
|
{
|
||
|
fn(alg->nid, impl->method.method, fnarg);
|
||
|
}
|
||
|
|
||
|
struct alg_do_each_data_st {
|
||
|
void (*fn)(int id, void *method, void *fnarg);
|
||
|
void *fnarg;
|
||
|
};
|
||
|
|
||
|
static void alg_do_each(ossl_uintmax_t idx, ALGORITHM *alg, void *arg)
|
||
|
{
|
||
|
struct alg_do_each_data_st *data = arg;
|
||
|
int i, end = sk_IMPLEMENTATION_num(alg->impls);
|
||
|
|
||
|
for (i = 0; i < end; i++) {
|
||
|
IMPLEMENTATION *impl = sk_IMPLEMENTATION_value(alg->impls, i);
|
||
|
|
||
|
alg_do_one(alg, impl, data->fn, data->fnarg);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void ossl_method_store_do_all(OSSL_METHOD_STORE *store,
|
||
|
void (*fn)(int id, void *method, void *fnarg),
|
||
|
void *fnarg)
|
||
|
{
|
||
|
struct alg_do_each_data_st data;
|
||
|
|
||
|
data.fn = fn;
|
||
|
data.fnarg = fnarg;
|
||
|
if (store != NULL)
|
||
|
ossl_sa_ALGORITHM_doall_arg(store->algs, alg_do_each, &data);
|
||
|
}
|
||
|
|
||
|
int ossl_method_store_fetch(OSSL_METHOD_STORE *store,
|
||
|
int nid, const char *prop_query,
|
||
|
const OSSL_PROVIDER **prov_rw, void **method)
|
||
|
{
|
||
|
OSSL_PROPERTY_LIST **plp;
|
||
|
ALGORITHM *alg;
|
||
|
IMPLEMENTATION *impl, *best_impl = NULL;
|
||
|
OSSL_PROPERTY_LIST *pq = NULL, *p2 = NULL;
|
||
|
const OSSL_PROVIDER *prov = prov_rw != NULL ? *prov_rw : NULL;
|
||
|
int ret = 0;
|
||
|
int j, best = -1, score, optional;
|
||
|
|
||
|
if (nid <= 0 || method == NULL || store == NULL)
|
||
|
return 0;
|
||
|
|
||
|
#ifndef FIPS_MODULE
|
||
|
if (ossl_lib_ctx_is_default(store->ctx)
|
||
|
&& !OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL))
|
||
|
return 0;
|
||
|
#endif
|
||
|
|
||
|
/* This only needs to be a read lock, because the query won't create anything */
|
||
|
if (!ossl_property_read_lock(store))
|
||
|
return 0;
|
||
|
alg = ossl_method_store_retrieve(store, nid);
|
||
|
if (alg == NULL) {
|
||
|
ossl_property_unlock(store);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
if (prop_query != NULL)
|
||
|
p2 = pq = ossl_parse_query(store->ctx, prop_query, 0);
|
||
|
plp = ossl_ctx_global_properties(store->ctx, 0);
|
||
|
if (plp != NULL && *plp != NULL) {
|
||
|
if (pq == NULL) {
|
||
|
pq = *plp;
|
||
|
} else {
|
||
|
p2 = ossl_property_merge(pq, *plp);
|
||
|
ossl_property_free(pq);
|
||
|
if (p2 == NULL)
|
||
|
goto fin;
|
||
|
pq = p2;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (pq == NULL) {
|
||
|
for (j = 0; j < sk_IMPLEMENTATION_num(alg->impls); j++) {
|
||
|
if ((impl = sk_IMPLEMENTATION_value(alg->impls, j)) != NULL
|
||
|
&& (prov == NULL || impl->provider == prov)) {
|
||
|
best_impl = impl;
|
||
|
ret = 1;
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
goto fin;
|
||
|
}
|
||
|
optional = ossl_property_has_optional(pq);
|
||
|
for (j = 0; j < sk_IMPLEMENTATION_num(alg->impls); j++) {
|
||
|
if ((impl = sk_IMPLEMENTATION_value(alg->impls, j)) != NULL
|
||
|
&& (prov == NULL || impl->provider == prov)) {
|
||
|
score = ossl_property_match_count(pq, impl->properties);
|
||
|
if (score > best) {
|
||
|
best_impl = impl;
|
||
|
best = score;
|
||
|
ret = 1;
|
||
|
if (!optional)
|
||
|
goto fin;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
fin:
|
||
|
if (ret && ossl_method_up_ref(&best_impl->method)) {
|
||
|
*method = best_impl->method.method;
|
||
|
if (prov_rw != NULL)
|
||
|
*prov_rw = best_impl->provider;
|
||
|
} else {
|
||
|
ret = 0;
|
||
|
}
|
||
|
ossl_property_unlock(store);
|
||
|
ossl_property_free(p2);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static void ossl_method_cache_flush_alg(OSSL_METHOD_STORE *store,
|
||
|
ALGORITHM *alg)
|
||
|
{
|
||
|
store->cache_nelem -= lh_QUERY_num_items(alg->cache);
|
||
|
impl_cache_flush_alg(0, alg);
|
||
|
}
|
||
|
|
||
|
static void ossl_method_cache_flush(OSSL_METHOD_STORE *store, int nid)
|
||
|
{
|
||
|
ALGORITHM *alg = ossl_method_store_retrieve(store, nid);
|
||
|
|
||
|
if (alg != NULL)
|
||
|
ossl_method_cache_flush_alg(store, alg);
|
||
|
}
|
||
|
|
||
|
int ossl_method_store_cache_flush_all(OSSL_METHOD_STORE *store)
|
||
|
{
|
||
|
if (!ossl_property_write_lock(store))
|
||
|
return 0;
|
||
|
ossl_sa_ALGORITHM_doall(store->algs, &impl_cache_flush_alg);
|
||
|
store->cache_nelem = 0;
|
||
|
ossl_property_unlock(store);
|
||
|
return 1;
|
||
|
}
|
||
|
|
||
|
IMPLEMENT_LHASH_DOALL_ARG(QUERY, IMPL_CACHE_FLUSH);
|
||
|
|
||
|
/*
|
||
|
* Flush an element from the query cache (perhaps).
|
||
|
*
|
||
|
* In order to avoid taking a write lock or using atomic operations
|
||
|
* to keep accurate least recently used (LRU) or least frequently used
|
||
|
* (LFU) information, the procedure used here is to stochastically
|
||
|
* flush approximately half the cache.
|
||
|
*
|
||
|
* This procedure isn't ideal, LRU or LFU would be better. However,
|
||
|
* in normal operation, reaching a full cache would be unexpected.
|
||
|
* It means that no steady state of algorithm queries has been reached.
|
||
|
* That is, it is most likely an attack of some form. A suboptimal clearance
|
||
|
* strategy that doesn't degrade performance of the normal case is
|
||
|
* preferable to a more refined approach that imposes a performance
|
||
|
* impact.
|
||
|
*/
|
||
|
static void impl_cache_flush_cache(QUERY *c, IMPL_CACHE_FLUSH *state)
|
||
|
{
|
||
|
uint32_t n;
|
||
|
|
||
|
/*
|
||
|
* Implement the 32 bit xorshift as suggested by George Marsaglia in:
|
||
|
* https://doi.org/10.18637/jss.v008.i14
|
||
|
*
|
||
|
* This is a very fast PRNG so there is no need to extract bits one at a
|
||
|
* time and use the entire value each time.
|
||
|
*/
|
||
|
n = state->seed;
|
||
|
n ^= n << 13;
|
||
|
n ^= n >> 17;
|
||
|
n ^= n << 5;
|
||
|
state->seed = n;
|
||
|
|
||
|
if ((n & 1) != 0)
|
||
|
impl_cache_free(lh_QUERY_delete(state->cache, c));
|
||
|
else
|
||
|
state->nelem++;
|
||
|
}
|
||
|
|
||
|
static void impl_cache_flush_one_alg(ossl_uintmax_t idx, ALGORITHM *alg,
|
||
|
void *v)
|
||
|
{
|
||
|
IMPL_CACHE_FLUSH *state = (IMPL_CACHE_FLUSH *)v;
|
||
|
|
||
|
state->cache = alg->cache;
|
||
|
lh_QUERY_doall_IMPL_CACHE_FLUSH(state->cache, &impl_cache_flush_cache,
|
||
|
state);
|
||
|
}
|
||
|
|
||
|
static void ossl_method_cache_flush_some(OSSL_METHOD_STORE *store)
|
||
|
{
|
||
|
IMPL_CACHE_FLUSH state;
|
||
|
static TSAN_QUALIFIER uint32_t global_seed = 1;
|
||
|
|
||
|
state.nelem = 0;
|
||
|
state.using_global_seed = 0;
|
||
|
if ((state.seed = OPENSSL_rdtsc()) == 0) {
|
||
|
/* If there is no timer available, seed another way */
|
||
|
state.using_global_seed = 1;
|
||
|
state.seed = tsan_load(&global_seed);
|
||
|
}
|
||
|
store->cache_need_flush = 0;
|
||
|
ossl_sa_ALGORITHM_doall_arg(store->algs, &impl_cache_flush_one_alg, &state);
|
||
|
store->cache_nelem = state.nelem;
|
||
|
/* Without a timer, update the global seed */
|
||
|
if (state.using_global_seed)
|
||
|
tsan_store(&global_seed, state.seed);
|
||
|
}
|
||
|
|
||
|
int ossl_method_store_cache_get(OSSL_METHOD_STORE *store, OSSL_PROVIDER *prov,
|
||
|
int nid, const char *prop_query, void **method)
|
||
|
{
|
||
|
ALGORITHM *alg;
|
||
|
QUERY elem, *r;
|
||
|
int res = 0;
|
||
|
|
||
|
if (nid <= 0 || store == NULL || prop_query == NULL)
|
||
|
return 0;
|
||
|
|
||
|
if (!ossl_property_read_lock(store))
|
||
|
return 0;
|
||
|
alg = ossl_method_store_retrieve(store, nid);
|
||
|
if (alg == NULL)
|
||
|
goto err;
|
||
|
|
||
|
elem.query = prop_query;
|
||
|
elem.provider = prov;
|
||
|
r = lh_QUERY_retrieve(alg->cache, &elem);
|
||
|
if (r == NULL)
|
||
|
goto err;
|
||
|
if (ossl_method_up_ref(&r->method)) {
|
||
|
*method = r->method.method;
|
||
|
res = 1;
|
||
|
}
|
||
|
err:
|
||
|
ossl_property_unlock(store);
|
||
|
return res;
|
||
|
}
|
||
|
|
||
|
int ossl_method_store_cache_set(OSSL_METHOD_STORE *store, OSSL_PROVIDER *prov,
|
||
|
int nid, const char *prop_query, void *method,
|
||
|
int (*method_up_ref)(void *),
|
||
|
void (*method_destruct)(void *))
|
||
|
{
|
||
|
QUERY elem, *old, *p = NULL;
|
||
|
ALGORITHM *alg;
|
||
|
size_t len;
|
||
|
int res = 1;
|
||
|
|
||
|
if (nid <= 0 || store == NULL || prop_query == NULL)
|
||
|
return 0;
|
||
|
|
||
|
if (!ossl_assert(prov != NULL))
|
||
|
return 0;
|
||
|
|
||
|
if (!ossl_property_write_lock(store))
|
||
|
return 0;
|
||
|
if (store->cache_need_flush)
|
||
|
ossl_method_cache_flush_some(store);
|
||
|
alg = ossl_method_store_retrieve(store, nid);
|
||
|
if (alg == NULL)
|
||
|
goto err;
|
||
|
|
||
|
if (method == NULL) {
|
||
|
elem.query = prop_query;
|
||
|
elem.provider = prov;
|
||
|
if ((old = lh_QUERY_delete(alg->cache, &elem)) != NULL) {
|
||
|
impl_cache_free(old);
|
||
|
store->cache_nelem--;
|
||
|
}
|
||
|
goto end;
|
||
|
}
|
||
|
p = OPENSSL_malloc(sizeof(*p) + (len = strlen(prop_query)));
|
||
|
if (p != NULL) {
|
||
|
p->query = p->body;
|
||
|
p->provider = prov;
|
||
|
p->method.method = method;
|
||
|
p->method.up_ref = method_up_ref;
|
||
|
p->method.free = method_destruct;
|
||
|
if (!ossl_method_up_ref(&p->method))
|
||
|
goto err;
|
||
|
memcpy((char *)p->query, prop_query, len + 1);
|
||
|
if ((old = lh_QUERY_insert(alg->cache, p)) != NULL) {
|
||
|
impl_cache_free(old);
|
||
|
goto end;
|
||
|
}
|
||
|
if (!lh_QUERY_error(alg->cache)) {
|
||
|
if (++store->cache_nelem >= IMPL_CACHE_FLUSH_THRESHOLD)
|
||
|
store->cache_need_flush = 1;
|
||
|
goto end;
|
||
|
}
|
||
|
ossl_method_free(&p->method);
|
||
|
}
|
||
|
err:
|
||
|
res = 0;
|
||
|
OPENSSL_free(p);
|
||
|
end:
|
||
|
ossl_property_unlock(store);
|
||
|
return res;
|
||
|
}
|