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b857ffe629
boringssl/include/openssl/ex_data.h
David Benjamin b857ffe629 Remove CRYPTO_ex_data_new_class. 
It's unused and requires ex_data support a class number per type.

Change-Id: Ie1fb55053631ef00c3318f3253f7c9501988f522
Reviewed-on: https://boringssl-review.googlesource.com/4371
Reviewed-by: Adam Langley <agl@google.com>
2015-04-15 23:24:21 +00:00

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C
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
/* ====================================================================
* Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com). */
#ifndef OPENSSL_HEADER_EX_DATA_H
#define OPENSSL_HEADER_EX_DATA_H
#include <openssl/base.h>
#include <openssl/stack.h>
#if defined(__cplusplus)
extern "C" {
#endif
/* ex_data is a mechanism for associating arbitrary extra data with objects.
* The different types of objects which can have data associated with them are
* called "classes" and there are predefined classes for all the OpenSSL
* objects that support ex_data.
*
* Within a given class, different users can be assigned indexes in which to
* store their data. Each index has callback functions that are called when a
* new object of that type is created, freed and duplicated. */
typedef struct crypto_ex_data_st CRYPTO_EX_DATA;
/* CRYPTO_EX_new is the type of a callback function that is called whenever a
* new object of a given class is created. For example, if this callback has
* been passed to |CRYPTO_get_ex_new_index| with a |class| of
* |CRYPTO_EX_INDEX_SSL| then it'll be called each time an SSL* is created.
*
* The callback is passed the new object (i.e. the SSL*) in |parent|. The
* arguments |argl| and |argp| contain opaque values that were given to
* |CRYPTO_get_ex_new_index|. The callback should return one on success, but
* the value is ignored.
*
* TODO(fork): the |ptr| argument is always NULL, no? */
typedef int CRYPTO_EX_new(void *parent, void *ptr, CRYPTO_EX_DATA *ad,
int index, long argl, void *argp);
/* CRYPTO_EX_free is a callback function that is called when an object of the
* class is being destroyed. See |CRYPTO_EX_new| for a discussion of the
* arguments.
*
* If |CRYPTO_get_ex_new_index| was called after the creation of objects of the
* class that this applies to then, when those those objects are destroyed,
* this callback will be called with a NULL value for |ptr|. */
typedef void CRYPTO_EX_free(void *parent, void *ptr, CRYPTO_EX_DATA *ad,
int index, long argl, void *argp);
/* CRYPTO_EX_dup is a callback function that is called when an object of the
* class is being copied and thus the ex_data linked to it also needs to be
* copied. On entry, |*from_d| points to the data for this index from the
* original object. When the callback returns, |*from_d| will be set as the
* data for this index in |to|.
*
* If |CRYPTO_get_ex_new_index| was called after the creation of objects of the
* class that this applies to then, when those those objects are copies, this
* callback will be called with a NULL value for |*from_d|. */
typedef int CRYPTO_EX_dup(CRYPTO_EX_DATA *to, const CRYPTO_EX_DATA *from,
void **from_d, int index, long argl, void *argp);
/* CRYPTO_get_ex_new_index allocates a new index for ex_data linked with
* objects of the given |class|. This should not be called directly, rather
* each class of object should provide a wrapper function that sets
* |class_value| correctly.
*
* The |class_value| argument should be one of |CRYPTO_EX_INDEX_*|.
*
* See the descriptions of the callback typedefs for details of when they are
* called. Any of the callback arguments may be NULL. The |argl| and |argp|
* arguments are opaque values that are passed to the callbacks.
*
* It returns the new index, or a negative number on error.
*
* TODO(fork): this should follow the standard calling convention.
*
* TODO(fork): replace the class_value with a pointer to EX_CLASS_ITEM. Saves
* having that hash table and some of the lock-bouncing. Maybe have every
* module have a private global EX_CLASS_ITEM somewhere and any direct callers
* of CRYPTO_{get,set}_ex_data{,_index} would have to always call the
* wrappers. */
OPENSSL_EXPORT int CRYPTO_get_ex_new_index(int class_value, long argl,
void *argp, CRYPTO_EX_new *new_func,
CRYPTO_EX_dup *dup_func,
CRYPTO_EX_free *free_func);
/* CRYPTO_set_ex_data sets an extra data pointer on a given object. This should
* not be called directly, rather each class of object should provide a wrapper
* function.
*
* The |index| argument should have been returned from a previous call to
* |CRYPTO_get_ex_new_index|. */
OPENSSL_EXPORT int CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad, int index, void *val);
/* CRYPTO_set_ex_data return an extra data pointer for a given object, or NULL
* if no such index exists. This should not be called directly, rather each
* class of object should provide a wrapper function.
*
* The |index| argument should have been returned from a previous call to
* |CRYPTO_get_ex_new_index|. */
OPENSSL_EXPORT void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int index);
/* CRYPTO_EX_INDEX_* are the built-in classes of objects.
*
* TODO(fork): WARNING: these are called "INDEX", but they aren't! */
enum {
CRYPTO_EX_INDEX_BIO,
CRYPTO_EX_INDEX_SSL,
CRYPTO_EX_INDEX_SSL_CTX,
CRYPTO_EX_INDEX_SSL_SESSION,
CRYPTO_EX_INDEX_X509_STORE,
CRYPTO_EX_INDEX_X509_STORE_CTX,
CRYPTO_EX_INDEX_RSA,
CRYPTO_EX_INDEX_DSA,
CRYPTO_EX_INDEX_DH,
CRYPTO_EX_INDEX_X509,
CRYPTO_EX_INDEX_EC_KEY,
};
/* Embedding, allocating and freeing |CRYPTO_EX_DATA| structures for objects
* that embed them. */
/* CRYPTO_new_ex_data initialises a newly allocated |CRYPTO_EX_DATA| which is
* embedded inside of |obj| which is of class |class_value|. Returns one on
* success and zero otherwise. */
OPENSSL_EXPORT int CRYPTO_new_ex_data(int class_value, void *obj,
CRYPTO_EX_DATA *ad);
/* CRYPTO_dup_ex_data duplicates |from| into a freshly allocated
* |CRYPTO_EX_DATA|, |to|. Both of which are inside objects of the given
* class. It returns one on success and zero otherwise. */
OPENSSL_EXPORT int CRYPTO_dup_ex_data(int class_value, CRYPTO_EX_DATA *to,
const CRYPTO_EX_DATA *from);
/* CRYPTO_free_ex_data frees |ad|, which is embedded inside |obj|, which is an
* object of the given class. */
OPENSSL_EXPORT void CRYPTO_free_ex_data(int class_value, void *obj,
CRYPTO_EX_DATA *ad);
/* Private functions. */
/* CRYPTO_cleanup_all_ex_data cleans up all ex_data state. It assumes that no
* other threads are executing code that might call ex_data functions. */
OPENSSL_EXPORT void CRYPTO_cleanup_all_ex_data(void);
struct crypto_ex_data_st {
STACK_OF(void) *sk;
};
#if defined(__cplusplus)
} /* extern C */
#endif
#endif /* OPENSSL_HEADER_EX_DATA_H */
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