eng_local.h
/*
* Copyright 2001-2023 The OpenSSL Project Authors. All Rights Reserved.
* Copyright (c) 2002, 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
*/
#ifndef OSSL_CRYPTO_ENGINE_ENG_LOCAL_H
# define OSSL_CRYPTO_ENGINE_ENG_LOCAL_H
# include <openssl/trace.h>
# include "internal/cryptlib.h"
# include "crypto/engine.h"
# include "internal/thread_once.h"
# include "internal/refcount.h"
extern CRYPTO_RWLOCK *global_engine_lock;
/*
* This prints the engine's pointer address, "struct" or "funct" to
* indicate the reference type, the before and after reference count, and
* the file:line-number pair. The "ENGINE_REF_PRINT" statements must come
* *after* the change.
*/
# define ENGINE_REF_PRINT(e, isfunct, diff) \
OSSL_TRACE6(ENGINE_REF_COUNT, \
"engine: %p %s from %d to %d (%s:%d)\n", \
(void *)(e), (isfunct ? "funct" : "struct"), \
((isfunct) \
? ((e)->funct_ref - (diff)) \
: (eng_struct_ref(e) - (diff))), \
((isfunct) ? (e)->funct_ref : eng_struct_ref(e)), \
(OPENSSL_FILE), (OPENSSL_LINE))
/*
* Any code that will need cleanup operations should use these functions to
* register callbacks. engine_cleanup_int() will call all registered
* callbacks in order. NB: both the "add" functions assume the engine lock to
* already be held (in "write" mode).
*/
typedef void (ENGINE_CLEANUP_CB) (void);
typedef struct st_engine_cleanup_item {
ENGINE_CLEANUP_CB *cb;
} ENGINE_CLEANUP_ITEM;
DEFINE_STACK_OF(ENGINE_CLEANUP_ITEM)
int engine_cleanup_add_first(ENGINE_CLEANUP_CB *cb);
int engine_cleanup_add_last(ENGINE_CLEANUP_CB *cb);
/* We need stacks of ENGINEs for use in eng_table.c */
DEFINE_STACK_OF(ENGINE)
/*
* This represents an implementation table. Dependent code should instantiate
* it as a (ENGINE_TABLE *) pointer value set initially to NULL.
*/
typedef struct st_engine_table ENGINE_TABLE;
int engine_table_register(ENGINE_TABLE **table, ENGINE_CLEANUP_CB *cleanup,
ENGINE *e, const int *nids, int num_nids,
int setdefault);
void engine_table_unregister(ENGINE_TABLE **table, ENGINE *e);
void engine_table_cleanup(ENGINE_TABLE **table);
ENGINE *ossl_engine_table_select(ENGINE_TABLE **table, int nid,
const char *f, int l);
typedef void (engine_table_doall_cb) (int nid, STACK_OF(ENGINE) *sk,
ENGINE *def, void *arg);
void engine_table_doall(ENGINE_TABLE *table, engine_table_doall_cb *cb,
void *arg);
/*
* Internal versions of API functions that have control over locking. These
* are used between C files when functionality needs to be shared but the
* caller may already be controlling of the engine lock.
*/
int engine_unlocked_init(ENGINE *e);
int engine_unlocked_finish(ENGINE *e, int unlock_for_handlers);
int engine_free_util(ENGINE *e, int not_locked);
/*
* This function will reset all "set"able values in an ENGINE to NULL. This
* won't touch reference counts or ex_data, but is equivalent to calling all
* the ENGINE_set_***() functions with a NULL value.
*/
void engine_set_all_null(ENGINE *e);
/*
* NB: Bitwise OR-able values for the "flags" variable in ENGINE are now
* exposed in engine.h.
*/
/* Free up dynamically allocated public key methods associated with ENGINE */
void engine_pkey_meths_free(ENGINE *e);
void engine_pkey_asn1_meths_free(ENGINE *e);
/* Once initialisation function */
extern CRYPTO_ONCE engine_lock_init;
DECLARE_RUN_ONCE(do_engine_lock_init)
typedef void (*ENGINE_DYNAMIC_ID)(void);
int engine_add_dynamic_id(ENGINE *e, ENGINE_DYNAMIC_ID dynamic_id,
int not_locked);
void engine_remove_dynamic_id(ENGINE *e, int not_locked);
/*
* This is a structure for storing implementations of various crypto
* algorithms and functions.
*/
struct engine_st {
const char *id;
const char *name;
const RSA_METHOD *rsa_meth;
const DSA_METHOD *dsa_meth;
const DH_METHOD *dh_meth;
const EC_KEY_METHOD *ec_meth;
const RAND_METHOD *rand_meth;
/* Cipher handling is via this callback */
ENGINE_CIPHERS_PTR ciphers;
/* Digest handling is via this callback */
ENGINE_DIGESTS_PTR digests;
/* Public key handling via this callback */
ENGINE_PKEY_METHS_PTR pkey_meths;
/* ASN1 public key handling via this callback */
ENGINE_PKEY_ASN1_METHS_PTR pkey_asn1_meths;
ENGINE_GEN_INT_FUNC_PTR destroy;
ENGINE_GEN_INT_FUNC_PTR init;
ENGINE_GEN_INT_FUNC_PTR finish;
ENGINE_CTRL_FUNC_PTR ctrl;
ENGINE_LOAD_KEY_PTR load_privkey;
ENGINE_LOAD_KEY_PTR load_pubkey;
ENGINE_SSL_CLIENT_CERT_PTR load_ssl_client_cert;
const ENGINE_CMD_DEFN *cmd_defns;
int flags;
/* reference count on the structure itself */
CRYPTO_REF_COUNT struct_ref;
/*
* reference count on usability of the engine type. NB: This controls the
* loading and initialisation of any functionality required by this
* engine, whereas the previous count is simply to cope with
* (de)allocation of this structure. Hence, running_ref <= struct_ref at
* all times.
*/
int funct_ref;
/* A place to store per-ENGINE data */
CRYPTO_EX_DATA ex_data;
/* Used to maintain the linked-list of engines. */
struct engine_st *prev;
struct engine_st *next;
/* Used to maintain the linked-list of dynamic engines. */
struct engine_st *prev_dyn;
struct engine_st *next_dyn;
ENGINE_DYNAMIC_ID dynamic_id;
};
typedef struct st_engine_pile ENGINE_PILE;
DEFINE_LHASH_OF_EX(ENGINE_PILE);
static ossl_unused ossl_inline int eng_struct_ref(ENGINE *e)
{
int res;
CRYPTO_GET_REF(&e->struct_ref, &res);
return res;
}
#endif /* OSSL_CRYPTO_ENGINE_ENG_LOCAL_H */
