/* 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);

 	}