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1/* $OpenBSD: eng_int.h,v 1.12 2023/07/28 09:22:26 tb Exp $ */
2/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
3 * project 2000.
4 */
5/* ====================================================================
6 * Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58/* ====================================================================
59 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
60 * ECDH support in OpenSSL originally developed by
61 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
62 */
63
64#ifndef HEADER_ENGINE_INT_H
65#define HEADER_ENGINE_INT_H
66
67/* Take public definitions from engine.h */
68#include <openssl/engine.h>
69
70__BEGIN_HIDDEN_DECLS
71
72/* If we compile with this symbol defined, then both reference counts in the
73 * ENGINE structure will be monitored with a line of output on stderr for each
74 * change. This prints the engine's pointer address (truncated to unsigned int),
75 * "struct" or "funct" to indicate the reference type, the before and after
76 * reference count, and the file:line-number pair. The "engine_ref_debug"
77 * statements must come *after* the change. */
78#ifdef ENGINE_REF_COUNT_DEBUG
79
80#define engine_ref_debug(e, isfunct, diff) \
81 fprintf(stderr, "engine: %08x %s from %d to %d (%s:%d)\n", \
82 (unsigned int)(e), (isfunct ? "funct" : "struct"), \
83 ((isfunct) ? ((e)->funct_ref - (diff)) : ((e)->struct_ref - (diff))), \
84 ((isfunct) ? (e)->funct_ref : (e)->struct_ref), \
85 (__FILE__), (__LINE__));
86
87#else
88
89#define engine_ref_debug(e, isfunct, diff)
90
91#endif
92
93/* Any code that will need cleanup operations should use these functions to
94 * register callbacks. ENGINE_cleanup() will call all registered callbacks in
95 * order. NB: both the "add" functions assume CRYPTO_LOCK_ENGINE to already be
96 * held (in "write" mode). */
97typedef void (ENGINE_CLEANUP_CB)(void);
98typedef struct st_engine_cleanup_item {
99 ENGINE_CLEANUP_CB *cb;
100} ENGINE_CLEANUP_ITEM;
101DECLARE_STACK_OF(ENGINE_CLEANUP_ITEM)
102void engine_cleanup_add_first(ENGINE_CLEANUP_CB *cb);
103void engine_cleanup_add_last(ENGINE_CLEANUP_CB *cb);
104
105/* We need stacks of ENGINEs for use in eng_table.c */
106DECLARE_STACK_OF(ENGINE)
107
108/* If this symbol is defined then engine_table_select(), the function that is
109 * used by RSA, DSA (etc) code to select registered ENGINEs, cache defaults and
110 * functional references (etc), will display debugging summaries to stderr. */
111/* #define ENGINE_TABLE_DEBUG */
112
113/* This represents an implementation table. Dependent code should instantiate it
114 * as a (ENGINE_TABLE *) pointer value set initially to NULL. */
115typedef struct st_engine_table ENGINE_TABLE;
116int engine_table_register(ENGINE_TABLE **table, ENGINE_CLEANUP_CB *cleanup,
117 ENGINE *e, const int *nids, int num_nids, int setdefault);
118void engine_table_unregister(ENGINE_TABLE **table, ENGINE *e);
119void engine_table_cleanup(ENGINE_TABLE **table);
120#ifndef ENGINE_TABLE_DEBUG
121ENGINE *engine_table_select(ENGINE_TABLE **table, int nid);
122#else
123ENGINE *engine_table_select_tmp(ENGINE_TABLE **table, int nid, const char *f,
124 int l);
125#define engine_table_select(t,n) engine_table_select_tmp(t,n,__FILE__,__LINE__)
126#endif
127typedef void (engine_table_doall_cb)(int nid, STACK_OF(ENGINE) *sk,
128 ENGINE *def, void *arg);
129void engine_table_doall(ENGINE_TABLE *table, engine_table_doall_cb *cb,
130 void *arg);
131
132/* Internal versions of API functions that have control over locking. These are
133 * used between C files when functionality needs to be shared but the caller may
134 * already be controlling of the CRYPTO_LOCK_ENGINE lock. */
135int engine_unlocked_init(ENGINE *e);
136int engine_unlocked_finish(ENGINE *e, int unlock_for_handlers);
137int engine_free_util(ENGINE *e, int locked);
138
139/* This function will reset all "set"able values in an ENGINE to NULL. This
140 * won't touch reference counts or ex_data, but is equivalent to calling all the
141 * ENGINE_set_***() functions with a NULL value. */
142void engine_set_all_null(ENGINE *e);
143
144/* NB: Bitwise OR-able values for the "flags" variable in ENGINE are now exposed
145 * in engine.h. */
146
147/* Free up dynamically allocated public key methods associated with ENGINE */
148
149void engine_pkey_meths_free(ENGINE *e);
150void engine_pkey_asn1_meths_free(ENGINE *e);
151
152/* This is a structure for storing implementations of various crypto
153 * algorithms and functions. */
154struct engine_st {
155 const char *id;
156 const char *name;
157 const RSA_METHOD *rsa_meth;
158 const DSA_METHOD *dsa_meth;
159 const DH_METHOD *dh_meth;
160 const EC_KEY_METHOD *ec_meth;
161 const RAND_METHOD *rand_meth;
162 const STORE_METHOD *store_meth;
163 /* Cipher handling is via this callback */
164 ENGINE_CIPHERS_PTR ciphers;
165 /* Digest handling is via this callback */
166 ENGINE_DIGESTS_PTR digests;
167 /* Public key handling via this callback */
168 ENGINE_PKEY_METHS_PTR pkey_meths;
169 /* ASN1 public key handling via this callback */
170 ENGINE_PKEY_ASN1_METHS_PTR pkey_asn1_meths;
171
172 ENGINE_GEN_INT_FUNC_PTR destroy;
173
174 ENGINE_GEN_INT_FUNC_PTR init;
175 ENGINE_GEN_INT_FUNC_PTR finish;
176 ENGINE_CTRL_FUNC_PTR ctrl;
177 ENGINE_LOAD_KEY_PTR load_privkey;
178 ENGINE_LOAD_KEY_PTR load_pubkey;
179
180 ENGINE_SSL_CLIENT_CERT_PTR load_ssl_client_cert;
181
182 const ENGINE_CMD_DEFN *cmd_defns;
183 int flags;
184 /* reference count on the structure itself */
185 int struct_ref;
186 /* reference count on usability of the engine type. NB: This
187 * controls the loading and initialisation of any functionlity
188 * required by this engine, whereas the previous count is
189 * simply to cope with (de)allocation of this structure. Hence,
190 * running_ref <= struct_ref at all times. */
191 int funct_ref;
192 /* A place to store per-ENGINE data */
193 CRYPTO_EX_DATA ex_data;
194 /* Used to maintain the linked-list of engines. */
195 struct engine_st *prev;
196 struct engine_st *next;
197};
198
199__END_HIDDEN_DECLS
200
201#endif /* HEADER_ENGINE_INT_H */
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