1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
57 /* ====================================================================
58 * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
60 * Redistribution and use in source and binary forms, with or without
61 * modification, are permitted provided that the following conditions
64 * 1. Redistributions of source code must retain the above copyright
65 * notice, this list of conditions and the following disclaimer.
67 * 2. Redistributions in binary form must reproduce the above copyright
68 * notice, this list of conditions and the following disclaimer in
69 * the documentation and/or other materials provided with the
72 * 3. All advertising materials mentioning features or use of this
73 * software must display the following acknowledgment:
74 * "This product includes software developed by the OpenSSL Project
75 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
78 * endorse or promote products derived from this software without
79 * prior written permission. For written permission, please contact
80 * openssl-core@openssl.org.
82 * 5. Products derived from this software may not be called "OpenSSL"
83 * nor may "OpenSSL" appear in their names without prior written
84 * permission of the OpenSSL Project.
86 * 6. Redistributions of any form whatsoever must retain the following
88 * "This product includes software developed by the OpenSSL Project
89 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
92 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
94 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
95 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
96 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
97 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
98 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
99 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
100 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
101 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
102 * OF THE POSSIBILITY OF SUCH DAMAGE.
103 * ====================================================================
105 * This product includes cryptographic software written by Eric Young
106 * (eay@cryptsoft.com). This product includes software written by Tim
107 * Hudson (tjh@cryptsoft.com). */
109 #ifndef OPENSSL_HEADER_EX_DATA_H
110 #define OPENSSL_HEADER_EX_DATA_H
112 #include <openssl/base.h>
114 #include <openssl/stack.h>
116 #if defined(__cplusplus)
121 // ex_data is a mechanism for associating arbitrary extra data with objects.
122 // For each type of object that supports ex_data, different users can be
123 // assigned indexes in which to store their data. Each index has callback
124 // functions that are called when an object of that type is freed or
128 typedef struct crypto_ex_data_st CRYPTO_EX_DATA;
131 // Type-specific functions.
133 // Each type that supports ex_data provides three functions:
137 // TYPE_get_ex_new_index allocates a new index for |TYPE|. An optional
138 // |free_func| argument may be provided which is called when the owning object
139 // is destroyed. See |CRYPTO_EX_free| for details. The |argl| and |argp|
140 // arguments are opaque values that are passed to the callback. It returns the
141 // new index or a negative number on error.
142 OPENSSL_EXPORT int TYPE_get_ex_new_index(long argl, void *argp,
143 CRYPTO_EX_unused *unused,
144 CRYPTO_EX_dup *dup_unused,
145 CRYPTO_EX_free *free_func);
147 // TYPE_set_ex_data sets an extra data pointer on |t|. The |index| argument
148 // should have been returned from a previous call to |TYPE_get_ex_new_index|.
149 OPENSSL_EXPORT int TYPE_set_ex_data(TYPE *t, int index, void *arg);
151 // TYPE_get_ex_data returns an extra data pointer for |t|, or NULL if no such
152 // pointer exists. The |index| argument should have been returned from a
153 // previous call to |TYPE_get_ex_new_index|.
154 OPENSSL_EXPORT void *TYPE_get_ex_data(const TYPE *t, int index);
161 // CRYPTO_EX_free is a callback function that is called when an object of the
162 // class with extra data pointers is being destroyed. For example, if this
163 // callback has been passed to |SSL_get_ex_new_index| then it may be called each
164 // time an |SSL*| is destroyed.
166 // The callback is passed the new object (i.e. the |SSL*|) in |parent|. The
167 // arguments |argl| and |argp| contain opaque values that were given to
168 // |CRYPTO_get_ex_new_index|. The callback should return one on success, but
169 // the value is ignored.
171 // This callback may be called with a NULL value for |ptr| if |parent| has no
172 // value set for this index. However, the callbacks may also be skipped entirely
173 // if no extra data pointers are set on |parent| at all.
174 typedef void CRYPTO_EX_free(void *parent, void *ptr, CRYPTO_EX_DATA *ad,
175 int index, long argl, void *argp);
178 // Deprecated functions.
180 // CRYPTO_cleanup_all_ex_data does nothing.
181 OPENSSL_EXPORT void CRYPTO_cleanup_all_ex_data(void);
183 // CRYPTO_EX_dup is a legacy callback function type which is ignored.
184 typedef int CRYPTO_EX_dup(CRYPTO_EX_DATA *to, const CRYPTO_EX_DATA *from,
185 void **from_d, int index, long argl, void *argp);
188 // Private structures.
190 // CRYPTO_EX_unused is a placeholder for an unused callback. It is aliased to
191 // int to ensure non-NULL callers fail to compile rather than fail silently.
192 typedef int CRYPTO_EX_unused;
194 struct crypto_ex_data_st {
199 #if defined(__cplusplus)
203 #endif // OPENSSL_HEADER_EX_DATA_H