2 * Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
5 * Licensed under the Apache License 2.0 (the "License"). You may not use
6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
11 #ifndef HEADER_ENGINE_INT_H
12 # define HEADER_ENGINE_INT_H
14 # include <openssl/trace.h>
15 # include "internal/cryptlib.h"
16 # include "internal/engine.h"
17 # include "internal/thread_once.h"
18 # include "internal/refcount.h"
20 extern CRYPTO_RWLOCK *global_engine_lock;
23 * If we compile with this symbol defined, then both reference counts in the
24 * ENGINE structure will be monitored with a line of output on stderr for
25 * each change. This prints the engine's pointer address (truncated to
26 * unsigned int), "struct" or "funct" to indicate the reference type, the
27 * before and after reference count, and the file:line-number pair. The
28 * "engine_ref_debug" statements must come *after* the change.
30 # ifdef ENGINE_REF_COUNT_DEBUG
32 # define engine_ref_debug(e, isfunct, diff) \
33 fprintf(stderr, "engine: %08x %s from %d to %d (%s:%d)\n", \
34 (unsigned int)(e), (isfunct ? "funct" : "struct"), \
35 ((isfunct) ? ((e)->funct_ref - (diff)) : ((e)->struct_ref - (diff))), \
36 ((isfunct) ? (e)->funct_ref : (e)->struct_ref), \
37 (OPENSSL_FILE), (OPENSSL_LINE))
41 # define engine_ref_debug(e, isfunct, diff)
46 * Any code that will need cleanup operations should use these functions to
47 * register callbacks. engine_cleanup_int() will call all registered
48 * callbacks in order. NB: both the "add" functions assume the engine lock to
49 * already be held (in "write" mode).
51 typedef void (ENGINE_CLEANUP_CB) (void);
52 typedef struct st_engine_cleanup_item {
53 ENGINE_CLEANUP_CB *cb;
54 } ENGINE_CLEANUP_ITEM;
55 DEFINE_STACK_OF(ENGINE_CLEANUP_ITEM)
56 void engine_cleanup_add_first(ENGINE_CLEANUP_CB *cb);
57 void engine_cleanup_add_last(ENGINE_CLEANUP_CB *cb);
59 /* We need stacks of ENGINEs for use in eng_table.c */
60 DEFINE_STACK_OF(ENGINE)
63 * This represents an implementation table. Dependent code should instantiate
64 * it as a (ENGINE_TABLE *) pointer value set initially to NULL.
66 typedef struct st_engine_table ENGINE_TABLE;
67 int engine_table_register(ENGINE_TABLE **table, ENGINE_CLEANUP_CB *cleanup,
68 ENGINE *e, const int *nids, int num_nids,
70 void engine_table_unregister(ENGINE_TABLE **table, ENGINE *e);
71 void engine_table_cleanup(ENGINE_TABLE **table);
72 ENGINE *engine_table_select_int(ENGINE_TABLE **table, int nid, const char *f,
74 # define engine_table_select(t,n) \
75 engine_table_select_int(t,n,OPENSSL_FILE,OPENSSL_LINE)
76 typedef void (engine_table_doall_cb) (int nid, STACK_OF(ENGINE) *sk,
77 ENGINE *def, void *arg);
78 void engine_table_doall(ENGINE_TABLE *table, engine_table_doall_cb *cb,
82 * Internal versions of API functions that have control over locking. These
83 * are used between C files when functionality needs to be shared but the
84 * caller may already be controlling of the engine lock.
86 int engine_unlocked_init(ENGINE *e);
87 int engine_unlocked_finish(ENGINE *e, int unlock_for_handlers);
88 int engine_free_util(ENGINE *e, int not_locked);
91 * This function will reset all "set"able values in an ENGINE to NULL. This
92 * won't touch reference counts or ex_data, but is equivalent to calling all
93 * the ENGINE_set_***() functions with a NULL value.
95 void engine_set_all_null(ENGINE *e);
98 * NB: Bitwise OR-able values for the "flags" variable in ENGINE are now
99 * exposed in engine.h.
102 /* Free up dynamically allocated public key methods associated with ENGINE */
104 void engine_pkey_meths_free(ENGINE *e);
105 void engine_pkey_asn1_meths_free(ENGINE *e);
107 /* Once initialisation function */
108 extern CRYPTO_ONCE engine_lock_init;
109 DECLARE_RUN_ONCE(do_engine_lock_init)
112 * This is a structure for storing implementations of various crypto
113 * algorithms and functions.
118 const RSA_METHOD *rsa_meth;
119 const DSA_METHOD *dsa_meth;
120 const DH_METHOD *dh_meth;
121 const EC_KEY_METHOD *ec_meth;
122 const RAND_METHOD *rand_meth;
123 /* Cipher handling is via this callback */
124 ENGINE_CIPHERS_PTR ciphers;
125 /* Digest handling is via this callback */
126 ENGINE_DIGESTS_PTR digests;
127 /* Public key handling via this callback */
128 ENGINE_PKEY_METHS_PTR pkey_meths;
129 /* ASN1 public key handling via this callback */
130 ENGINE_PKEY_ASN1_METHS_PTR pkey_asn1_meths;
131 ENGINE_GEN_INT_FUNC_PTR destroy;
132 ENGINE_GEN_INT_FUNC_PTR init;
133 ENGINE_GEN_INT_FUNC_PTR finish;
134 ENGINE_CTRL_FUNC_PTR ctrl;
135 ENGINE_LOAD_KEY_PTR load_privkey;
136 ENGINE_LOAD_KEY_PTR load_pubkey;
137 ENGINE_SSL_CLIENT_CERT_PTR load_ssl_client_cert;
138 const ENGINE_CMD_DEFN *cmd_defns;
140 /* reference count on the structure itself */
141 CRYPTO_REF_COUNT struct_ref;
143 * reference count on usability of the engine type. NB: This controls the
144 * loading and initialisation of any functionality required by this
145 * engine, whereas the previous count is simply to cope with
146 * (de)allocation of this structure. Hence, running_ref <= struct_ref at
150 /* A place to store per-ENGINE data */
151 CRYPTO_EX_DATA ex_data;
152 /* Used to maintain the linked-list of engines. */
153 struct engine_st *prev;
154 struct engine_st *next;
157 typedef struct st_engine_pile ENGINE_PILE;
159 DEFINE_LHASH_OF(ENGINE_PILE);
161 #endif /* HEADER_ENGINE_INT_H */