/* v3_conf.c */

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

 * project 1999.

 */

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

 * Copyright (c) 1999-2002 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.

 */

/* extension creation utilities */

#include <stdio.h>

#include <ctype.h>

#include "cryptlib.h"

#include <openssl/conf.h>

#include <openssl/x509.h>

#include <openssl/x509v3.h>

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

#include "libcrypto_wsd_macros.h"

#include "libcrypto_wsd.h"

#endif

static int v3_check_critical(char **value);

static int v3_check_generic(char **value);

static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid, int crit, char *value);

static X509_EXTENSION *v3_generic_extension(const char *ext, char *value, int crit, int type, X509V3_CTX *ctx);

static char *conf_lhash_get_string(void *db, char *section, char *value);

static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section);

static X509_EXTENSION *do_ext_i2d(X509V3_EXT_METHOD *method, int ext_nid,

						 int crit, void *ext_struc);

static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx, long *ext_len);

/* CONF *conf:  Config file    */

/* char *name:  Name    */

/* char *value:  Value    */

EXPORT_C X509_EXTENSION *X509V3_EXT_nconf(CONF *conf, X509V3_CTX *ctx, char *name,

	     char *value)

	{

	int crit;

	int ext_type;

	X509_EXTENSION *ret;

	crit = v3_check_critical(&value);

	if ((ext_type = v3_check_generic(&value))) 

		return v3_generic_extension(name, value, crit, ext_type, ctx);

	ret = do_ext_nconf(conf, ctx, OBJ_sn2nid(name), crit, value);

	if (!ret)

		{

		X509V3err(X509V3_F_X509V3_EXT_NCONF,X509V3_R_ERROR_IN_EXTENSION);

		ERR_add_error_data(4,"name=", name, ", value=", value);

		}

	return ret;

	}

/* CONF *conf:  Config file    */

/* char *value:  Value    */

EXPORT_C X509_EXTENSION *X509V3_EXT_nconf_nid(CONF *conf, X509V3_CTX *ctx, int ext_nid,

	     char *value)

	{

	int crit;

	int ext_type;

	crit = v3_check_critical(&value);

	if ((ext_type = v3_check_generic(&value))) 

		return v3_generic_extension(OBJ_nid2sn(ext_nid),

						 value, crit, ext_type, ctx);

	return do_ext_nconf(conf, ctx, ext_nid, crit, value);

	}

/* CONF *conf:  Config file    */

/* char *value:  Value    */

static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid,

	     int crit, char *value)

	{

	X509V3_EXT_METHOD *method;

	X509_EXTENSION *ext;

	STACK_OF(CONF_VALUE) *nval;

	void *ext_struc;

	if (ext_nid == NID_undef)

		{

		X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_UNKNOWN_EXTENSION_NAME);

		return NULL;

		}

	if (!(method = X509V3_EXT_get_nid(ext_nid)))

		{

		X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_UNKNOWN_EXTENSION);

		return NULL;

		}

	/* Now get internal extension representation based on type */

	if (method->v2i)

		{

		if(*value == '@') nval = NCONF_get_section(conf, value + 1);

		else nval = X509V3_parse_list(value);

		if(sk_CONF_VALUE_num(nval) <= 0)

			{

			X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_INVALID_EXTENSION_STRING);

			ERR_add_error_data(4, "name=", OBJ_nid2sn(ext_nid), ",section=", value);

			return NULL;

			}

		ext_struc = method->v2i(method, ctx, nval);

		if(*value != '@') sk_CONF_VALUE_pop_free(nval,

							 X509V3_conf_free);

		if(!ext_struc) return NULL;

		}

	else if(method->s2i)

		{

		if(!(ext_struc = method->s2i(method, ctx, value))) return NULL;

		}

	else if(method->r2i)

		{

		if(!ctx->db || !ctx->db_meth)

			{

			X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_NO_CONFIG_DATABASE);

			return NULL;

			}

		if(!(ext_struc = method->r2i(method, ctx, value))) return NULL;

		}

	else

		{

		X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED);

		ERR_add_error_data(2, "name=", OBJ_nid2sn(ext_nid));

		return NULL;

		}

	ext  = do_ext_i2d(method, ext_nid, crit, ext_struc);

	if(method->it) ASN1_item_free(ext_struc, ASN1_ITEM_ptr(method->it));

	else method->ext_free(ext_struc);

	return ext;

	}

static X509_EXTENSION *do_ext_i2d(X509V3_EXT_METHOD *method, int ext_nid,

						 int crit, void *ext_struc)

	{

	unsigned char *ext_der;

	int ext_len;

	ASN1_OCTET_STRING *ext_oct;

	X509_EXTENSION *ext;

	/* Convert internal representation to DER */

	if (method->it)

		{

		ext_der = NULL;

		ext_len = ASN1_item_i2d(ext_struc, &ext_der, ASN1_ITEM_ptr(method->it));

		if (ext_len < 0) goto merr;

		}

	 else

		{

		unsigned char *p;

		ext_len = method->i2d(ext_struc, NULL);

		if(!(ext_der = OPENSSL_malloc(ext_len))) goto merr;

		p = ext_der;

		method->i2d(ext_struc, &p);

		}

	if (!(ext_oct = M_ASN1_OCTET_STRING_new())) goto merr;

	ext_oct->data = ext_der;

	ext_oct->length = ext_len;

	ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct);

	if (!ext) goto merr;

	M_ASN1_OCTET_STRING_free(ext_oct);

	return ext;

	merr:

	X509V3err(X509V3_F_DO_EXT_I2D,ERR_R_MALLOC_FAILURE);

	return NULL;

	}

/* Given an internal structure, nid and critical flag create an extension */

EXPORT_C X509_EXTENSION *X509V3_EXT_i2d(int ext_nid, int crit, void *ext_struc)

	{

	X509V3_EXT_METHOD *method;

	if (!(method = X509V3_EXT_get_nid(ext_nid))) {

		X509V3err(X509V3_F_X509V3_EXT_I2D,X509V3_R_UNKNOWN_EXTENSION);

		return NULL;

	}

	return do_ext_i2d(method, ext_nid, crit, ext_struc);

}

/* Check the extension string for critical flag */

static int v3_check_critical(char **value)

{

	char *p = *value;

	if ((strlen(p) < 9) || strncmp(p, "critical,", 9)) return 0;

	p+=9;

	while(isspace((unsigned char)*p)) p++;

	*value = p;

	return 1;

}

/* Check extension string for generic extension and return the type */

static int v3_check_generic(char **value)

{

	int gen_type = 0;

	char *p = *value;

	if ((strlen(p) >= 4) && !strncmp(p, "DER:", 4))

		{

		p+=4;

		gen_type = 1;

		}

	else if ((strlen(p) >= 5) && !strncmp(p, "ASN1:", 5))

		{

		p+=5;

		gen_type = 2;

		}

	else

		return 0;

	while (isspace((unsigned char)*p)) p++;

	*value = p;

	return gen_type;

}

/* Create a generic extension: for now just handle DER type */

static X509_EXTENSION *v3_generic_extension(const char *ext, char *value,

	     int crit, int gen_type, X509V3_CTX *ctx)

	{

	unsigned char *ext_der=NULL;

	long ext_len;

	ASN1_OBJECT *obj=NULL;

	ASN1_OCTET_STRING *oct=NULL;

	X509_EXTENSION *extension=NULL;

	if (!(obj = OBJ_txt2obj(ext, 0)))

		{

		X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_NAME_ERROR);

		ERR_add_error_data(2, "name=", ext);

		goto err;

		}

	if (gen_type == 1)

		ext_der = string_to_hex(value, &ext_len);

	else if (gen_type == 2)

		ext_der = generic_asn1(value, ctx, &ext_len);

	if (ext_der == NULL)

		{

		X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_VALUE_ERROR);

		ERR_add_error_data(2, "value=", value);

		goto err;

		}

	if (!(oct = M_ASN1_OCTET_STRING_new()))

		{

		X509V3err(X509V3_F_V3_GENERIC_EXTENSION,ERR_R_MALLOC_FAILURE);

		goto err;

		}

	oct->data = ext_der;

	oct->length = ext_len;

	ext_der = NULL;

	extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct);

	err:

	ASN1_OBJECT_free(obj);

	M_ASN1_OCTET_STRING_free(oct);

	if(ext_der) OPENSSL_free(ext_der);

	return extension;

	}

static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx, long *ext_len)

	{

	ASN1_TYPE *typ;

	unsigned char *ext_der = NULL;

	typ = ASN1_generate_v3(value, ctx);

	if (typ == NULL)

		return NULL;

	*ext_len = i2d_ASN1_TYPE(typ, &ext_der);

	ASN1_TYPE_free(typ);

	return ext_der;

	}

/* This is the main function: add a bunch of extensions based on a config file

 * section to an extension STACK.

 */

EXPORT_C int X509V3_EXT_add_nconf_sk(CONF *conf, X509V3_CTX *ctx, char *section,

	     STACK_OF(X509_EXTENSION) **sk)

	{

	X509_EXTENSION *ext;

	STACK_OF(CONF_VALUE) *nval;

	CONF_VALUE *val;	

	int i;

	if (!(nval = NCONF_get_section(conf, section))) return 0;

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

		{

		val = sk_CONF_VALUE_value(nval, i);

		if (!(ext = X509V3_EXT_nconf(conf, ctx, val->name, val->value)))

								return 0;

		if (sk) X509v3_add_ext(sk, ext, -1);

		X509_EXTENSION_free(ext);

		}

	return 1;

	}

/* Convenience functions to add extensions to a certificate, CRL and request */

EXPORT_C int X509V3_EXT_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,

	     X509 *cert)

	{

	STACK_OF(X509_EXTENSION) **sk = NULL;

	if (cert)

		sk = &cert->cert_info->extensions;

	return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);

	}

/* Same as above but for a CRL */

EXPORT_C int X509V3_EXT_CRL_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,

	     X509_CRL *crl)

	{

	STACK_OF(X509_EXTENSION) **sk = NULL;

	if (crl)

		sk = &crl->crl->extensions;

	return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);

	}

/* Add extensions to certificate request */

EXPORT_C int X509V3_EXT_REQ_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,

	     X509_REQ *req)

	{

	STACK_OF(X509_EXTENSION) *extlist = NULL, **sk = NULL;

	int i;

	if (req)

		sk = &extlist;

	i = X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);

	if (!i || !sk)

		return i;

	i = X509_REQ_add_extensions(req, extlist);

	sk_X509_EXTENSION_pop_free(extlist, X509_EXTENSION_free);

	return i;

	}

/* Config database functions */

EXPORT_C char * X509V3_get_string(X509V3_CTX *ctx, char *name, char *section)

	{

	if(!ctx->db || !ctx->db_meth || !ctx->db_meth->get_string)

		{

		X509V3err(X509V3_F_X509V3_GET_STRING,X509V3_R_OPERATION_NOT_DEFINED);

		return NULL;

		}

	if (ctx->db_meth->get_string)

			return ctx->db_meth->get_string(ctx->db, name, section);

	return NULL;

	}

EXPORT_C STACK_OF(CONF_VALUE) * X509V3_get_section(X509V3_CTX *ctx, char *section)

	{

	if(!ctx->db || !ctx->db_meth || !ctx->db_meth->get_section)

		{

		X509V3err(X509V3_F_X509V3_GET_SECTION,X509V3_R_OPERATION_NOT_DEFINED);

		return NULL;

		}

	if (ctx->db_meth->get_section)

			return ctx->db_meth->get_section(ctx->db, section);

	return NULL;

	}

EXPORT_C void X509V3_string_free(X509V3_CTX *ctx, char *str)

	{

	if (!str) return;

	if (ctx->db_meth->free_string)

			ctx->db_meth->free_string(ctx->db, str);

	}

EXPORT_C void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section)

	{

	if (!section) return;

	if (ctx->db_meth->free_section)

			ctx->db_meth->free_section(ctx->db, section);

	}

static char *nconf_get_string(void *db, char *section, char *value)

	{

	return NCONF_get_string(db, section, value);

	}

static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, char *section)

	{

	return NCONF_get_section(db, section);

	}

#ifndef EMULATOR

static X509V3_CONF_METHOD nconf_method = {

nconf_get_string,

nconf_get_section,

NULL,

NULL

};

#else

GET_STATIC_VAR_FROM_TLS(nconf_method,v3_conf,X509V3_CONF_METHOD)

#define nconf_method (*GET_WSD_VAR_NAME(nconf_method,v3_conf, s)())

const X509V3_CONF_METHOD temp_s_nconf_method = {

nconf_get_string,

nconf_get_section,

NULL,

NULL

};

#endif

EXPORT_C void X509V3_set_nconf(X509V3_CTX *ctx, CONF *conf)

	{

	ctx->db_meth = &nconf_method;

	ctx->db = conf;

	}

EXPORT_C void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req,

	     X509_CRL *crl, int flags)

	{

	ctx->issuer_cert = issuer;

	ctx->subject_cert = subj;

	ctx->crl = crl;

	ctx->subject_req = req;

	ctx->flags = flags;

	}

/* Old conf compatibility functions */

EXPORT_C X509_EXTENSION *X509V3_EXT_conf(LHASH *conf, X509V3_CTX *ctx, char *name,

	     char *value)

	{

	CONF ctmp;

	CONF_set_nconf(&ctmp, conf);

	return X509V3_EXT_nconf(&ctmp, ctx, name, value);

	}

/* LHASH *conf:  Config file    */

/* char *value:  Value    */

EXPORT_C X509_EXTENSION *X509V3_EXT_conf_nid(LHASH *conf, X509V3_CTX *ctx, int ext_nid,

	     char *value)

	{

	CONF ctmp;

	CONF_set_nconf(&ctmp, conf);

	return X509V3_EXT_nconf_nid(&ctmp, ctx, ext_nid, value);

	}

static char *conf_lhash_get_string(void *db, char *section, char *value)

	{

	return CONF_get_string(db, section, value);

	}

static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section)

	{

	return CONF_get_section(db, section);

	}

#ifndef EMULATOR

static X509V3_CONF_METHOD conf_lhash_method = {

conf_lhash_get_string,

conf_lhash_get_section,

NULL,

NULL

};

#else

GET_STATIC_VAR_FROM_TLS(conf_lhash_method,v3_conf,X509V3_CONF_METHOD)

#define conf_lhash_method (*GET_WSD_VAR_NAME(conf_lhash_method,v3_conf, s)())

const X509V3_CONF_METHOD temp_s_conf_lhash_method = {

conf_lhash_get_string,

conf_lhash_get_section,

NULL,

NULL

};

#endif

EXPORT_C void X509V3_set_conf_lhash(X509V3_CTX *ctx, LHASH *lhash)

	{

	ctx->db_meth = &conf_lhash_method;

	ctx->db = lhash;

	}

EXPORT_C int X509V3_EXT_add_conf(LHASH *conf, X509V3_CTX *ctx, char *section,

	     X509 *cert)

	{

	CONF ctmp;

	CONF_set_nconf(&ctmp, conf);

	return X509V3_EXT_add_nconf(&ctmp, ctx, section, cert);

	}

/* Same as above but for a CRL */

EXPORT_C int X509V3_EXT_CRL_add_conf(LHASH *conf, X509V3_CTX *ctx, char *section,

	     X509_CRL *crl)

	{

	CONF ctmp;

	CONF_set_nconf(&ctmp, conf);

	return X509V3_EXT_CRL_add_nconf(&ctmp, ctx, section, crl);

	}

/* Add extensions to certificate request */

EXPORT_C int X509V3_EXT_REQ_add_conf(LHASH *conf, X509V3_CTX *ctx, char *section,

	     X509_REQ *req)

	{

	CONF ctmp;

	CONF_set_nconf(&ctmp, conf);

	return X509V3_EXT_REQ_add_nconf(&ctmp, ctx, section, req);

	}