/* crypto/engine/eng_int.h *//* 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 *    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 *    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 */#include <openssl/engine.h>#ifdef  __cplusplusextern "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#define engine_ref_debug(e, isfunct, diff) \	fprintf(stderr, "engine: %08x %s from %d to %d (%s:%d)\n", \		(unsigned int)(e), (isfunct ? "funct" : "struct"), \		((isfunct) ? ((e)->funct_ref - (diff)) : ((e)->struct_ref - (diff))), \		((isfunct) ? (e)->funct_ref : (e)->struct_ref), \		(__FILE__), (__LINE__));#else#define engine_ref_debug(e, isfunct, diff)#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	{	ENGINE_CLEANUP_CB *cb;	} ENGINE_CLEANUP_ITEM;DECLARE_STACK_OF(ENGINE_CLEANUP_ITEM)void engine_cleanup_add_first(ENGINE_CLEANUP_CB *cb);void engine_cleanup_add_last(ENGINE_CLEANUP_CB *cb);/* We need stacks of ENGINEs for use in eng_table.c */DECLARE_STACK_OF(ENGINE)/* 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;int engine_table_register(ENGINE_TABLE **table, ENGINE_CLEANUP_CB *cleanup,		ENGINE *e, const int *nids, int num_nids, int setdefault);void engine_table_unregister(ENGINE_TABLE **table, ENGINE *e);void engine_table_cleanup(ENGINE_TABLE **table);#ifndef ENGINE_TABLE_DEBUGENGINE *engine_table_select(ENGINE_TABLE **table, int nid);#elseENGINE *engine_table_select_tmp(ENGINE_TABLE **table, int nid, const char *f, int l);#define engine_table_select(t,n) engine_table_select_tmp(t,n,__FILE__,__LINE__)#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);int engine_unlocked_finish(ENGINE *e, int unlock_for_handlers);int engine_free_util(ENGINE *e, int locked);/* 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 DH_METHOD *dh_meth;	const RAND_METHOD *rand_meth;	/* Cipher handling is via this callback */	ENGINE_CIPHERS_PTR ciphers;	/* Digest handling is via this callback */	ENGINE_DIGESTS_PTR digests;	ENGINE_GEN_INT_FUNC_PTR	destroy;	ENGINE_GEN_INT_FUNC_PTR init;	ENGINE_GEN_INT_FUNC_PTR finish;	ENGINE_CTRL_FUNC_PTR ctrl;	ENGINE_LOAD_KEY_PTR load_privkey;	ENGINE_LOAD_KEY_PTR load_pubkey;	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 */	CRYPTO_EX_DATA ex_data;	/* Used to maintain the linked-list of engines. */	struct engine_st *prev;	struct engine_st *next;	};#ifdef  __cplusplus}#endif#endif /* HEADER_ENGINE_INT_H */