301 lines
6.7 KiB
C
301 lines
6.7 KiB
C
/*
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* Copyright 2001-2020 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (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 "e_os.h"
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#include "eng_local.h"
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#include <openssl/rand.h>
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#include "internal/refcount.h"
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CRYPTO_RWLOCK *global_engine_lock;
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CRYPTO_ONCE engine_lock_init = CRYPTO_ONCE_STATIC_INIT;
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/* The "new"/"free" stuff first */
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DEFINE_RUN_ONCE(do_engine_lock_init)
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{
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if (!OPENSSL_init_crypto(0, NULL))
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return 0;
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global_engine_lock = CRYPTO_THREAD_lock_new();
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return global_engine_lock != NULL;
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}
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ENGINE *ENGINE_new(void)
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{
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ENGINE *ret;
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if (!RUN_ONCE(&engine_lock_init, do_engine_lock_init)
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|| (ret = OPENSSL_zalloc(sizeof(*ret))) == NULL) {
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ENGINEerr(ENGINE_F_ENGINE_NEW, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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ret->struct_ref = 1;
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engine_ref_debug(ret, 0, 1);
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if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ENGINE, ret, &ret->ex_data)) {
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OPENSSL_free(ret);
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return NULL;
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}
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return ret;
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}
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/*
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* Placed here (close proximity to ENGINE_new) so that modifications to the
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* elements of the ENGINE structure are more likely to be caught and changed
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* here.
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*/
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void engine_set_all_null(ENGINE *e)
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{
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e->id = NULL;
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e->name = NULL;
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e->rsa_meth = NULL;
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e->dsa_meth = NULL;
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e->dh_meth = NULL;
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e->rand_meth = NULL;
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e->ciphers = NULL;
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e->digests = NULL;
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e->destroy = NULL;
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e->init = NULL;
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e->finish = NULL;
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e->ctrl = NULL;
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e->load_privkey = NULL;
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e->load_pubkey = NULL;
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e->cmd_defns = NULL;
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e->flags = 0;
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}
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int engine_free_util(ENGINE *e, int not_locked)
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{
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int i;
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if (e == NULL)
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return 1;
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if (not_locked)
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CRYPTO_DOWN_REF(&e->struct_ref, &i, global_engine_lock);
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else
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i = --e->struct_ref;
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engine_ref_debug(e, 0, -1);
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if (i > 0)
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return 1;
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REF_ASSERT_ISNT(i < 0);
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/* Free up any dynamically allocated public key methods */
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engine_pkey_meths_free(e);
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engine_pkey_asn1_meths_free(e);
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/*
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* Give the ENGINE a chance to do any structural cleanup corresponding to
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* allocation it did in its constructor (eg. unload error strings)
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*/
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if (e->destroy)
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e->destroy(e);
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ENGINE, e, &e->ex_data);
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OPENSSL_free(e);
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return 1;
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}
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int ENGINE_free(ENGINE *e)
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{
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return engine_free_util(e, 1);
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}
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/* Cleanup stuff */
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/*
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* engine_cleanup_int() is coded such that anything that does work that will
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* need cleanup can register a "cleanup" callback here. That way we don't get
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* linker bloat by referring to all *possible* cleanups, but any linker bloat
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* into code "X" will cause X's cleanup function to end up here.
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*/
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static STACK_OF(ENGINE_CLEANUP_ITEM) *cleanup_stack = NULL;
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static int int_cleanup_check(int create)
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{
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if (cleanup_stack)
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return 1;
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if (!create)
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return 0;
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cleanup_stack = sk_ENGINE_CLEANUP_ITEM_new_null();
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return (cleanup_stack ? 1 : 0);
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}
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static ENGINE_CLEANUP_ITEM *int_cleanup_item(ENGINE_CLEANUP_CB *cb)
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{
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ENGINE_CLEANUP_ITEM *item;
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if ((item = OPENSSL_malloc(sizeof(*item))) == NULL) {
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ENGINEerr(ENGINE_F_INT_CLEANUP_ITEM, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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item->cb = cb;
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return item;
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}
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void engine_cleanup_add_first(ENGINE_CLEANUP_CB *cb)
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{
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ENGINE_CLEANUP_ITEM *item;
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if (!int_cleanup_check(1))
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return;
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item = int_cleanup_item(cb);
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if (item)
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sk_ENGINE_CLEANUP_ITEM_insert(cleanup_stack, item, 0);
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}
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void engine_cleanup_add_last(ENGINE_CLEANUP_CB *cb)
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{
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ENGINE_CLEANUP_ITEM *item;
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if (!int_cleanup_check(1))
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return;
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item = int_cleanup_item(cb);
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if (item != NULL) {
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if (sk_ENGINE_CLEANUP_ITEM_push(cleanup_stack, item) <= 0)
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OPENSSL_free(item);
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}
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}
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/* The API function that performs all cleanup */
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static void engine_cleanup_cb_free(ENGINE_CLEANUP_ITEM *item)
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{
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(*(item->cb)) ();
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OPENSSL_free(item);
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}
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void engine_cleanup_int(void)
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{
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if (int_cleanup_check(0)) {
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sk_ENGINE_CLEANUP_ITEM_pop_free(cleanup_stack,
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engine_cleanup_cb_free);
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cleanup_stack = NULL;
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}
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CRYPTO_THREAD_lock_free(global_engine_lock);
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global_engine_lock = NULL;
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}
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/* Now the "ex_data" support */
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int ENGINE_set_ex_data(ENGINE *e, int idx, void *arg)
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{
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return CRYPTO_set_ex_data(&e->ex_data, idx, arg);
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}
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void *ENGINE_get_ex_data(const ENGINE *e, int idx)
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{
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return CRYPTO_get_ex_data(&e->ex_data, idx);
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}
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/*
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* Functions to get/set an ENGINE's elements - mainly to avoid exposing the
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* ENGINE structure itself.
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*/
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int ENGINE_set_id(ENGINE *e, const char *id)
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{
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if (id == NULL) {
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ENGINEerr(ENGINE_F_ENGINE_SET_ID, ERR_R_PASSED_NULL_PARAMETER);
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return 0;
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}
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e->id = id;
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return 1;
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}
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int ENGINE_set_name(ENGINE *e, const char *name)
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{
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if (name == NULL) {
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ENGINEerr(ENGINE_F_ENGINE_SET_NAME, ERR_R_PASSED_NULL_PARAMETER);
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return 0;
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}
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e->name = name;
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return 1;
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}
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int ENGINE_set_destroy_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR destroy_f)
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{
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e->destroy = destroy_f;
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return 1;
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}
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int ENGINE_set_init_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR init_f)
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{
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e->init = init_f;
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return 1;
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}
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int ENGINE_set_finish_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR finish_f)
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{
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e->finish = finish_f;
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return 1;
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}
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int ENGINE_set_ctrl_function(ENGINE *e, ENGINE_CTRL_FUNC_PTR ctrl_f)
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{
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e->ctrl = ctrl_f;
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return 1;
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}
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int ENGINE_set_flags(ENGINE *e, int flags)
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{
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e->flags = flags;
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return 1;
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}
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int ENGINE_set_cmd_defns(ENGINE *e, const ENGINE_CMD_DEFN *defns)
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{
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e->cmd_defns = defns;
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return 1;
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}
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const char *ENGINE_get_id(const ENGINE *e)
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{
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return e->id;
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}
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const char *ENGINE_get_name(const ENGINE *e)
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{
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return e->name;
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}
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ENGINE_GEN_INT_FUNC_PTR ENGINE_get_destroy_function(const ENGINE *e)
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{
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return e->destroy;
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}
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ENGINE_GEN_INT_FUNC_PTR ENGINE_get_init_function(const ENGINE *e)
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{
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return e->init;
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}
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ENGINE_GEN_INT_FUNC_PTR ENGINE_get_finish_function(const ENGINE *e)
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{
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return e->finish;
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}
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ENGINE_CTRL_FUNC_PTR ENGINE_get_ctrl_function(const ENGINE *e)
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{
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return e->ctrl;
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}
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int ENGINE_get_flags(const ENGINE *e)
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{
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return e->flags;
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}
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const ENGINE_CMD_DEFN *ENGINE_get_cmd_defns(const ENGINE *e)
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{
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return e->cmd_defns;
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}
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/*
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* eng_lib.o is pretty much linked into anything that touches ENGINE already,
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* so put the "static_state" hack here.
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*/
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static int internal_static_hack = 0;
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void *ENGINE_get_static_state(void)
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{
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return &internal_static_hack;
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}
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