/* crypto/engine/eng_lib.c */

 /* 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).

  *

  */

 /*

  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

  */

 #include "eng_int.h"

 #include <openssl/rand.h>

 #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

 #include "libcrypto_wsd_macros.h"

 #include "libcrypto_wsd.h"

 #endif

 /* The "new"/"free" stuff first */

 EXPORT_C ENGINE *ENGINE_new(void)

 	{

 	ENGINE *ret;

 	ret = (ENGINE *)OPENSSL_malloc(sizeof(ENGINE));

 	if(ret == NULL)

 		{

 		ENGINEerr(ENGINE_F_ENGINE_NEW, ERR_R_MALLOC_FAILURE);

 		return NULL;

 		}

 	memset(ret, 0, sizeof(ENGINE));

 	ret->struct_ref = 1;

 	engine_ref_debug(ret, 0, 1)

 	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ENGINE, ret, &ret->ex_data);

 	return ret;

 	}

 /* Placed here (close proximity to ENGINE_new) so that modifications to the

  * elements of the ENGINE structure are more likely to be caught and changed

  * here. */

 EXPORT_C void engine_set_all_null(ENGINE *e)

 	{

 	e->id = NULL;

 	e->name = NULL;

 	e->rsa_meth = NULL;

 	e->dsa_meth = NULL;

 	e->dh_meth = NULL;

 	e->rand_meth = NULL;

 	e->store_meth = NULL;

 	e->ciphers = NULL;

 	e->digests = NULL;

 	e->destroy = NULL;

 	e->init = NULL;

 	e->finish = NULL;

 	e->ctrl = NULL;

 	e->load_privkey = NULL;

 	e->load_pubkey = NULL;

 	e->cmd_defns = NULL;

 	e->flags = 0;

 	}

 EXPORT_C int engine_free_util(ENGINE *e, int locked)

 	{

 	int i;

 	if(e == NULL)

 		{

 		ENGINEerr(ENGINE_F_ENGINE_FREE_UTIL,

 			ERR_R_PASSED_NULL_PARAMETER);

 		return 0;

 		}

 	if(locked)

 		i = CRYPTO_add(&e->struct_ref,-1,CRYPTO_LOCK_ENGINE);

 	else

 		i = --e->struct_ref;

 	engine_ref_debug(e, 0, -1)

 	if (i > 0) return 1;

 #ifdef REF_CHECK

 	if (i < 0)

 		{

 		fprintf(stderr,"ENGINE_free, bad structural reference count\n");

 		abort();

 		}

 #endif

 	/* Give the ENGINE a chance to do any structural cleanup corresponding

 	 * to allocation it did in its constructor (eg. unload error strings) */

 	if(e->destroy)

 		e->destroy(e);

 	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ENGINE, e, &e->ex_data);

 	OPENSSL_free(e);

 	return 1;

 	}

 EXPORT_C int ENGINE_free(ENGINE *e)

 	{

 	return engine_free_util(e, 1);

 	}

 /* Cleanup stuff */

 /* ENGINE_cleanup() is coded such that anything that does work that will need

  * cleanup can register a "cleanup" callback here. That way we don't get linker

  * bloat by referring to all *possible* cleanups, but any linker bloat into code

  * "X" will cause X's cleanup function to end up here. */

 #ifndef EMULATOR 

 static STACK_OF(ENGINE_CLEANUP_ITEM) *cleanup_stack = NULL;

 #else

 GET_STATIC_VAR_FROM_TLS(cleanup_stack,eng_lib,STACK_OF(ENGINE_CLEANUP_ITEM) *)

 #define cleanup_stack (*GET_WSD_VAR_NAME(cleanup_stack,eng_lib, s)())

 #endif

 static int int_cleanup_check(int create)

 	{

 	if(cleanup_stack) return 1;

 	if(!create) return 0;

 	cleanup_stack = sk_ENGINE_CLEANUP_ITEM_new_null();

 	return (cleanup_stack ? 1 : 0);

 	}

 static ENGINE_CLEANUP_ITEM *int_cleanup_item(ENGINE_CLEANUP_CB *cb)

 	{

 	ENGINE_CLEANUP_ITEM *item = OPENSSL_malloc(sizeof(

 					ENGINE_CLEANUP_ITEM));

 	if(!item) return NULL;

 	item->cb = cb;

 	return item;

 	}

 EXPORT_C void engine_cleanup_add_first(ENGINE_CLEANUP_CB *cb)

 	{

 	ENGINE_CLEANUP_ITEM *item;

 	if(!int_cleanup_check(1)) return;

 	item = int_cleanup_item(cb);

 	if(item)

 		sk_ENGINE_CLEANUP_ITEM_insert(cleanup_stack, item, 0);

 	}

 EXPORT_C void engine_cleanup_add_last(ENGINE_CLEANUP_CB *cb)

 	{

 	ENGINE_CLEANUP_ITEM *item;

 	if(!int_cleanup_check(1)) return;

 	item = int_cleanup_item(cb);

 	if(item)

 		sk_ENGINE_CLEANUP_ITEM_push(cleanup_stack, item);

 	}

 /* The API function that performs all cleanup */

 static void engine_cleanup_cb_free(ENGINE_CLEANUP_ITEM *item)

 	{

 	(*(item->cb))();

 	OPENSSL_free(item);

 	}

 EXPORT_C void ENGINE_cleanup(void)

 	{

 	if(int_cleanup_check(0))

 		{

 		sk_ENGINE_CLEANUP_ITEM_pop_free(cleanup_stack,

 			engine_cleanup_cb_free);

 		cleanup_stack = NULL;

 		}

 	/* FIXME: This should be handled (somehow) through RAND, eg. by it

 	 * registering a cleanup callback. */

 	RAND_set_rand_method(NULL);

 	}

 /* Now the "ex_data" support */

 EXPORT_C int ENGINE_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,

 		CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)

 	{

 	return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ENGINE, argl, argp,

 			new_func, dup_func, free_func);

 	}

 EXPORT_C int ENGINE_set_ex_data(ENGINE *e, int idx, void *arg)

 	{

 	return(CRYPTO_set_ex_data(&e->ex_data, idx, arg));

 	}

 EXPORT_C void *ENGINE_get_ex_data(const ENGINE *e, int idx)

 	{

 	return(CRYPTO_get_ex_data(&e->ex_data, idx));

 	}

 /* Functions to get/set an ENGINE's elements - mainly to avoid exposing the

  * ENGINE structure itself. */

 EXPORT_C int ENGINE_set_id(ENGINE *e, const char *id)

 	{

 	if(id == NULL)

 		{

 		ENGINEerr(ENGINE_F_ENGINE_SET_ID,

 			ERR_R_PASSED_NULL_PARAMETER);

 		return 0;

 		}

 	e->id = id;

 	return 1;

 	}

 EXPORT_C int ENGINE_set_name(ENGINE *e, const char *name)

 	{

 	if(name == NULL)

 		{

 		ENGINEerr(ENGINE_F_ENGINE_SET_NAME,

 			ERR_R_PASSED_NULL_PARAMETER);

 		return 0;

 		}

 	e->name = name;

 	return 1;

 	}

 EXPORT_C int ENGINE_set_destroy_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR destroy_f)

 	{

 	e->destroy = destroy_f;

 	return 1;

 	}

 EXPORT_C int ENGINE_set_init_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR init_f)

 	{

 	e->init = init_f;

 	return 1;

 	}

 EXPORT_C int ENGINE_set_finish_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR finish_f)

 	{

 	e->finish = finish_f;

 	return 1;

 	}

 EXPORT_C int ENGINE_set_ctrl_function(ENGINE *e, ENGINE_CTRL_FUNC_PTR ctrl_f)

 	{

 	e->ctrl = ctrl_f;

 	return 1;

 	}

 EXPORT_C int ENGINE_set_flags(ENGINE *e, int flags)

 	{

 	e->flags = flags;

 	return 1;

 	}

 EXPORT_C int ENGINE_set_cmd_defns(ENGINE *e, const ENGINE_CMD_DEFN *defns)

 	{

 	e->cmd_defns = defns;

 	return 1;

 	}

 EXPORT_C const char *ENGINE_get_id(const ENGINE *e)

 	{

 	return e->id;

 	}

 EXPORT_C const char *ENGINE_get_name(const ENGINE *e)

 	{

 	return e->name;

 	}

 EXPORT_C ENGINE_GEN_INT_FUNC_PTR ENGINE_get_destroy_function(const ENGINE *e)

 	{

 	return e->destroy;

 	}

 EXPORT_C ENGINE_GEN_INT_FUNC_PTR ENGINE_get_init_function(const ENGINE *e)

 	{

 	return e->init;

 	}

 EXPORT_C ENGINE_GEN_INT_FUNC_PTR ENGINE_get_finish_function(const ENGINE *e)

 	{

 	return e->finish;

 	}

 EXPORT_C ENGINE_CTRL_FUNC_PTR ENGINE_get_ctrl_function(const ENGINE *e)

 	{

 	return e->ctrl;

 	}

 EXPORT_C int ENGINE_get_flags(const ENGINE *e)

 	{

 	return e->flags;

 	}

 EXPORT_C const ENGINE_CMD_DEFN *ENGINE_get_cmd_defns(const ENGINE *e)

 	{

 	return e->cmd_defns;

 	}

 /* eng_lib.o is pretty much linked into anything that touches ENGINE already, so

  * put the "static_state" hack here. */

 #ifndef EMULATOR

 static int internal_static_hack = 0;

 #else

 GET_STATIC_VAR_FROM_TLS(internal_static_hack,eng_lib,int)

 #define internal_static_hack (*GET_WSD_VAR_NAME(internal_static_hack,eng_lib, s)())

 #endif

 EXPORT_C void *ENGINE_get_static_state(void)

 	{

 	return &internal_static_hack;

 	}