diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/engine/eng_lib.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/engine/eng_lib.c | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/engine/eng_lib.c b/openssl-1.1.0h/crypto/engine/eng_lib.c new file mode 100644 index 0000000..cbefc7e --- /dev/null +++ b/openssl-1.1.0h/crypto/engine/eng_lib.c @@ -0,0 +1,290 @@ +/* + * Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (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 "eng_int.h" +#include <openssl/rand.h> + +CRYPTO_RWLOCK *global_engine_lock; + +CRYPTO_ONCE engine_lock_init = CRYPTO_ONCE_STATIC_INIT; + +/* The "new"/"free" stuff first */ + +DEFINE_RUN_ONCE(do_engine_lock_init) +{ + OPENSSL_init_crypto(0, NULL); + global_engine_lock = CRYPTO_THREAD_lock_new(); + return global_engine_lock != NULL; +} + +ENGINE *ENGINE_new(void) +{ + ENGINE *ret; + + if (!RUN_ONCE(&engine_lock_init, do_engine_lock_init) + || (ret = OPENSSL_zalloc(sizeof(*ret))) == NULL) { + ENGINEerr(ENGINE_F_ENGINE_NEW, ERR_R_MALLOC_FAILURE); + return NULL; + } + ret->struct_ref = 1; + engine_ref_debug(ret, 0, 1); + if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ENGINE, ret, &ret->ex_data)) { + OPENSSL_free(ret); + return NULL; + } + return ret; +} + +/* + * Placed here (close proximity to ENGINE_new) so that modifications to the + * elements of the ENGINE structure are more likely to be caught and changed + * here. + */ +void engine_set_all_null(ENGINE *e) +{ + e->id = NULL; + e->name = NULL; + e->rsa_meth = NULL; + e->dsa_meth = NULL; + e->dh_meth = NULL; + e->rand_meth = NULL; + e->ciphers = NULL; + e->digests = NULL; + e->destroy = NULL; + e->init = NULL; + e->finish = NULL; + e->ctrl = NULL; + e->load_privkey = NULL; + e->load_pubkey = NULL; + e->cmd_defns = NULL; + e->flags = 0; +} + +int engine_free_util(ENGINE *e, int locked) +{ + int i; + + if (e == NULL) + return 1; + if (locked) + CRYPTO_atomic_add(&e->struct_ref, -1, &i, global_engine_lock); + else + i = --e->struct_ref; + engine_ref_debug(e, 0, -1) + if (i > 0) + return 1; + REF_ASSERT_ISNT(i < 0); + /* Free up any dynamically allocated public key methods */ + engine_pkey_meths_free(e); + engine_pkey_asn1_meths_free(e); + /* + * Give the ENGINE a chance to do any structural cleanup corresponding to + * allocation it did in its constructor (eg. unload error strings) + */ + if (e->destroy) + e->destroy(e); + CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ENGINE, e, &e->ex_data); + OPENSSL_free(e); + return 1; +} + +int ENGINE_free(ENGINE *e) +{ + return engine_free_util(e, 1); +} + +/* Cleanup stuff */ + +/* + * engine_cleanup_int() is coded such that anything that does work that will + * need cleanup can register a "cleanup" callback here. That way we don't get + * linker bloat by referring to all *possible* cleanups, but any linker bloat + * into code "X" will cause X's cleanup function to end up here. + */ +static STACK_OF(ENGINE_CLEANUP_ITEM) *cleanup_stack = NULL; +static int int_cleanup_check(int create) +{ + if (cleanup_stack) + return 1; + if (!create) + return 0; + cleanup_stack = sk_ENGINE_CLEANUP_ITEM_new_null(); + return (cleanup_stack ? 1 : 0); +} + +static ENGINE_CLEANUP_ITEM *int_cleanup_item(ENGINE_CLEANUP_CB *cb) +{ + ENGINE_CLEANUP_ITEM *item = OPENSSL_malloc(sizeof(*item)); + if (item == NULL) + return NULL; + item->cb = cb; + return item; +} + +void engine_cleanup_add_first(ENGINE_CLEANUP_CB *cb) +{ + ENGINE_CLEANUP_ITEM *item; + if (!int_cleanup_check(1)) + return; + item = int_cleanup_item(cb); + if (item) + sk_ENGINE_CLEANUP_ITEM_insert(cleanup_stack, item, 0); +} + +void engine_cleanup_add_last(ENGINE_CLEANUP_CB *cb) +{ + ENGINE_CLEANUP_ITEM *item; + if (!int_cleanup_check(1)) + return; + item = int_cleanup_item(cb); + if (item) + sk_ENGINE_CLEANUP_ITEM_push(cleanup_stack, item); +} + +/* The API function that performs all cleanup */ +static void engine_cleanup_cb_free(ENGINE_CLEANUP_ITEM *item) +{ + (*(item->cb)) (); + OPENSSL_free(item); +} + +void engine_cleanup_int(void) +{ + if (int_cleanup_check(0)) { + sk_ENGINE_CLEANUP_ITEM_pop_free(cleanup_stack, + engine_cleanup_cb_free); + cleanup_stack = NULL; + } + CRYPTO_THREAD_lock_free(global_engine_lock); +} + +/* Now the "ex_data" support */ + +int ENGINE_set_ex_data(ENGINE *e, int idx, void *arg) +{ + return (CRYPTO_set_ex_data(&e->ex_data, idx, arg)); +} + +void *ENGINE_get_ex_data(const ENGINE *e, int idx) +{ + return (CRYPTO_get_ex_data(&e->ex_data, idx)); +} + +/* + * Functions to get/set an ENGINE's elements - mainly to avoid exposing the + * ENGINE structure itself. + */ + +int ENGINE_set_id(ENGINE *e, const char *id) +{ + if (id == NULL) { + ENGINEerr(ENGINE_F_ENGINE_SET_ID, ERR_R_PASSED_NULL_PARAMETER); + return 0; + } + e->id = id; + return 1; +} + +int ENGINE_set_name(ENGINE *e, const char *name) +{ + if (name == NULL) { + ENGINEerr(ENGINE_F_ENGINE_SET_NAME, ERR_R_PASSED_NULL_PARAMETER); + return 0; + } + e->name = name; + return 1; +} + +int ENGINE_set_destroy_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR destroy_f) +{ + e->destroy = destroy_f; + return 1; +} + +int ENGINE_set_init_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR init_f) +{ + e->init = init_f; + return 1; +} + +int ENGINE_set_finish_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR finish_f) +{ + e->finish = finish_f; + return 1; +} + +int ENGINE_set_ctrl_function(ENGINE *e, ENGINE_CTRL_FUNC_PTR ctrl_f) +{ + e->ctrl = ctrl_f; + return 1; +} + +int ENGINE_set_flags(ENGINE *e, int flags) +{ + e->flags = flags; + return 1; +} + +int ENGINE_set_cmd_defns(ENGINE *e, const ENGINE_CMD_DEFN *defns) +{ + e->cmd_defns = defns; + return 1; +} + +const char *ENGINE_get_id(const ENGINE *e) +{ + return e->id; +} + +const char *ENGINE_get_name(const ENGINE *e) +{ + return e->name; +} + +ENGINE_GEN_INT_FUNC_PTR ENGINE_get_destroy_function(const ENGINE *e) +{ + return e->destroy; +} + +ENGINE_GEN_INT_FUNC_PTR ENGINE_get_init_function(const ENGINE *e) +{ + return e->init; +} + +ENGINE_GEN_INT_FUNC_PTR ENGINE_get_finish_function(const ENGINE *e) +{ + return e->finish; +} + +ENGINE_CTRL_FUNC_PTR ENGINE_get_ctrl_function(const ENGINE *e) +{ + return e->ctrl; +} + +int ENGINE_get_flags(const ENGINE *e) +{ + return e->flags; +} + +const ENGINE_CMD_DEFN *ENGINE_get_cmd_defns(const ENGINE *e) +{ + return e->cmd_defns; +} + +/* + * eng_lib.o is pretty much linked into anything that touches ENGINE already, + * so put the "static_state" hack here. + */ + +static int internal_static_hack = 0; + +void *ENGINE_get_static_state(void) +{ + return &internal_static_hack; +} |