/* eng_cnf.c */

/* Written by Stephen Henson (shenson@bigfoot.com) for the OpenSSL

 * project 2001.

 */

/* ====================================================================

 * Copyright (c) 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/conf.h>

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

#include "libcrypto_wsd_macros.h"

#include "libcrypto_wsd.h"

#endif

/* #define ENGINE_CONF_DEBUG */

/* ENGINE config module */

static char *skip_dot(char *name)

	{

	char *p;

	p = strchr(name, '.');

	if (p)

		return p + 1;

	return name;

	}

#ifndef EMULATOR

static STACK_OF(ENGINE) *initialized_engines = NULL;

#else

GET_STATIC_VAR_FROM_TLS(initialized_engines,eng_cnf,STACK_OF(ENGINE) *)

#define initialized_engines (*GET_WSD_VAR_NAME(initialized_engines,eng_cnf, s)())

#endif

static int int_engine_init(ENGINE *e)

	{

	if (!ENGINE_init(e))

		return 0;

	if (!initialized_engines)

		initialized_engines = sk_ENGINE_new_null();

	if (!initialized_engines || !sk_ENGINE_push(initialized_engines, e))

		{

		ENGINE_finish(e);

		return 0;

		}

	return 1;

	}

static int int_engine_configure(char *name, char *value, const CONF *cnf)

	{

	int i;

	int ret = 0;

	long do_init = -1;

	STACK_OF(CONF_VALUE) *ecmds;

	CONF_VALUE *ecmd;

	char *ctrlname, *ctrlvalue;

	ENGINE *e = NULL;

	name = skip_dot(name);

#ifdef ENGINE_CONF_DEBUG

	fprintf(stderr, "Configuring engine %s\n", name);

#endif

	/* Value is a section containing ENGINE commands */

	ecmds = NCONF_get_section(cnf, value);

	if (!ecmds)

		{

		ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE, ENGINE_R_ENGINE_SECTION_ERROR);

		return 0;

		}

	for (i = 0; i < sk_CONF_VALUE_num(ecmds); i++)

		{

		ecmd = sk_CONF_VALUE_value(ecmds, i);

		ctrlname = skip_dot(ecmd->name);

		ctrlvalue = ecmd->value;

#ifdef ENGINE_CONF_DEBUG

	fprintf(stderr, "ENGINE conf: doing ctrl(%s,%s)\n", ctrlname, ctrlvalue);

#endif

		/* First handle some special pseudo ctrls */

		/* Override engine name to use */

		if (!strcmp(ctrlname, "engine_id"))

			name = ctrlvalue;

		/* Load a dynamic ENGINE */

		else if (!strcmp(ctrlname, "dynamic_path"))

			{

			e = ENGINE_by_id("dynamic");

			if (!e)

				goto err;

			if (!ENGINE_ctrl_cmd_string(e, "SO_PATH", ctrlvalue, 0))

				goto err;

			if (!ENGINE_ctrl_cmd_string(e, "LIST_ADD", "2", 0))

				goto err;

			if (!ENGINE_ctrl_cmd_string(e, "LOAD", NULL, 0))

				goto err;

			}

		/* ... add other pseudos here ... */

		else

			{

			/* At this point we need an ENGINE structural reference

			 * if we don't already have one.

			 */

			if (!e)

				{

				e = ENGINE_by_id(name);

				if (!e)

					return 0;

				}

			/* Allow "EMPTY" to mean no value: this allows a valid

			 * "value" to be passed to ctrls of type NO_INPUT

		 	 */

			if (!strcmp(ctrlvalue, "EMPTY"))

				ctrlvalue = NULL;

			if (!strcmp(ctrlname, "init"))

				{

				if (!NCONF_get_number_e(cnf, value, "init", &do_init))

					goto err;

				if (do_init == 1)

					{

					if (!int_engine_init(e))

						goto err;

					}

				else if (do_init != 0)

					{

					ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE, ENGINE_R_INVALID_INIT_VALUE);

					goto err;

					}

				}

			else if (!strcmp(ctrlname, "default_algorithms"))

				{

				if (!ENGINE_set_default_string(e, ctrlvalue))

					goto err;

				}

			else if (!ENGINE_ctrl_cmd_string(e,

					ctrlname, ctrlvalue, 0))

				return 0;

			}

		}

	if (e && (do_init == -1) && !int_engine_init(e))

		goto err;

	ret = 1;

	err:

	if (e)

		ENGINE_free(e);

	return ret;

	}

static int int_engine_module_init(CONF_IMODULE *md, const CONF *cnf)

	{

	STACK_OF(CONF_VALUE) *elist;

	CONF_VALUE *cval;

	int i;

#ifdef ENGINE_CONF_DEBUG

	fprintf(stderr, "Called engine module: name %s, value %s\n",

			CONF_imodule_get_name(md), CONF_imodule_get_value(md));

#endif

	/* Value is a section containing ENGINEs to configure */

	elist = NCONF_get_section(cnf, CONF_imodule_get_value(md));

	if (!elist)

		{

		ENGINEerr(ENGINE_F_INT_ENGINE_MODULE_INIT, ENGINE_R_ENGINES_SECTION_ERROR);

		return 0;

		}

	for (i = 0; i < sk_CONF_VALUE_num(elist); i++)

		{

		cval = sk_CONF_VALUE_value(elist, i);

		if (!int_engine_configure(cval->name, cval->value, cnf))

			return 0;

		}

	return 1;

	}

static void int_engine_module_finish(CONF_IMODULE *md)

	{

	ENGINE *e;

	while ((e = sk_ENGINE_pop(initialized_engines)))

		ENGINE_finish(e);

	sk_ENGINE_free(initialized_engines);

	initialized_engines = NULL;

	}

EXPORT_C void ENGINE_add_conf_module(void)

	{

	CONF_module_add("engines",

			int_engine_module_init,

			int_engine_module_finish);

	}