eng_int.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
* project 2000.
*/
/* ====================================================================
* Copyright (c) 1999-2001 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
* 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
* licensing@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 HEADER_ENGINE_INT_H
#define HEADER_ENGINE_INT_H
/* Take public definitions from engine.h */
#ifdef __cplusplus
extern "C" {
#endif
/* If we compile with this symbol defined, then both reference counts in the
* ENGINE structure will be monitored with a line of output on stderr for each
* change. This prints the engine's pointer address (truncated to unsigned int),
* "struct" or "funct" to indicate the reference type, the before and after
* reference count, and the file:line-number pair. The "engine_ref_debug"
* statements must come *after* the change. */
#ifdef ENGINE_REF_COUNT_DEBUG
#else
#endif
/* Any code that will need cleanup operations should use these functions to
* register callbacks. ENGINE_cleanup() will call all registered callbacks in
* order. NB: both the "add" functions assume CRYPTO_LOCK_ENGINE to already be
* held (in "write" mode). */
typedef void (ENGINE_CLEANUP_CB)(void);
typedef struct st_engine_cleanup_item
{
/* We need stacks of ENGINEs for use in eng_table.c */
/* If this symbol is defined then engine_table_select(), the function that is
* used by RSA, DSA (etc) code to select registered ENGINEs, cache defaults and
* functional references (etc), will display debugging summaries to stderr. */
/* #define ENGINE_TABLE_DEBUG */
/* 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;
#ifndef ENGINE_TABLE_DEBUG
#else
#endif
/* 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 CRYPTO_LOCK_ENGINE lock. */
int engine_unlocked_init(ENGINE *e);
/* 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. */
/* 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 RAND_METHOD *rand_meth;
/* Cipher handling is via this callback */
/* Digest handling is via this callback */
const ENGINE_CMD_DEFN *cmd_defns;
int flags;
/* reference count on the structure itself */
int struct_ref;
/* reference count on usability of the engine type. NB: This
* controls the loading and initialisation of any functionlity
* 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 */
/* Used to maintain the linked-list of engines. */
};
#ifdef __cplusplus
}
#endif
#endif /* HEADER_ENGINE_INT_H */