library/x509_create.c - security/mbedtls - Rivoreo Source Code Repositories

 /*
  *  X.509 base functions for creating certificates / CSRs
  *
  *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
  *
  *  All rights reserved.
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
  *  with this program; if not, write to the Free Software Foundation, Inc.,
  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */

 #include "polarssl/config.h"

 #if defined(POLARSSL_X509_CREATE_C)

 #include "polarssl/x509.h"
 #include "polarssl/asn1write.h"
 #include "polarssl/oid.h"

 #if defined(_MSC_VER) && !defined strncasecmp && !defined(EFIX64) && \
     !defined(EFI32)
 #define strncasecmp _strnicmp
 #endif

 int x509_string_to_names( asn1_named_data **head, const char *name )
 {
     int ret = 0;
     const char *s = name, *c = s;
     const char *end = s + strlen( s );
     const char *oid = NULL;
     int in_tag = 1;
     asn1_named_data *cur;

     /* Clear existing chain if present */
     asn1_free_named_data_list( head );

     while( c <= end )
     {
         if( in_tag && *c == '=' )
         {
             if( c - s == 2 && strncasecmp( s, "CN", 2 ) == 0 )
                 oid = OID_AT_CN;
             else if( c - s == 1 && strncasecmp( s, "C", 1 ) == 0 )
                 oid = OID_AT_COUNTRY;
             else if( c - s == 1 && strncasecmp( s, "O", 1 ) == 0 )
                 oid = OID_AT_ORGANIZATION;
             else if( c - s == 1 && strncasecmp( s, "L", 1 ) == 0 )
                 oid = OID_AT_LOCALITY;
             else if( c - s == 1 && strncasecmp( s, "R", 1 ) == 0 )
                 oid = OID_PKCS9_EMAIL;
             else if( c - s == 2 && strncasecmp( s, "OU", 2 ) == 0 )
                 oid = OID_AT_ORG_UNIT;
             else if( c - s == 2 && strncasecmp( s, "ST", 2 ) == 0 )
                 oid = OID_AT_STATE;
             else if( c - s == 12 && strncasecmp( s, "serialNumber", 12 ) == 0 )
                 oid = OID_AT_SERIAL_NUMBER;
             else if( c - s == 13 && strncasecmp( s, "postalAddress", 13 ) == 0 )
                 oid = OID_AT_POSTAL_ADDRESS;
             else if( c - s == 10 && strncasecmp( s, "postalCode", 10 ) == 0 )
                 oid = OID_AT_POSTAL_CODE;
             else
             {
                 ret = POLARSSL_ERR_X509_UNKNOWN_OID;
                 goto exit;
             }

             s = c + 1;
             in_tag = 0;
         }

         if( !in_tag && ( *c == ',' || c == end ) )
         {
             if( ( cur = asn1_store_named_data( head, oid, strlen( oid ),
                                                (unsigned char *) s,
                                                c - s ) ) == NULL )
             {
                 return( POLARSSL_ERR_X509_MALLOC_FAILED );
             }

             while( c < end && *(c + 1) == ' ' )
                 c++;

             s = c + 1;
             in_tag = 1;
         }
         c++;
     }

 exit:

     return( ret );
 }

 /* The first byte of the value in the asn1_named_data structure is reserved
  * to store the critical boolean for us
  */
 int x509_set_extension( asn1_named_data **head, const char *oid, size_t oid_len,
                         int critical, const unsigned char *val, size_t val_len )
 {
     asn1_named_data *cur;

     if( ( cur = asn1_store_named_data( head, oid, oid_len,
                                        NULL, val_len + 1 ) ) == NULL )
     {
         return( POLARSSL_ERR_X509_MALLOC_FAILED );
     }

     cur->val.p[0] = critical;
     memcpy( cur->val.p + 1, val, val_len );

     return( 0 );
 }

 /*
  *  RelativeDistinguishedName ::=
  *    SET OF AttributeTypeAndValue
  *
  *  AttributeTypeAndValue ::= SEQUENCE {
  *    type     AttributeType,
  *    value    AttributeValue }
  *
  *  AttributeType ::= OBJECT IDENTIFIER
  *
  *  AttributeValue ::= ANY DEFINED BY AttributeType
  */
 static int x509_write_name( unsigned char **p, unsigned char *start,
                             const char *oid, size_t oid_len,
                             const unsigned char *name, size_t name_len )
 {
     int ret;
     size_t len = 0;

     // Write PrintableString for all except OID_PKCS9_EMAIL
     //
     if( OID_SIZE( OID_PKCS9_EMAIL ) == oid_len &&
         memcmp( oid, OID_PKCS9_EMAIL, oid_len ) == 0 )
     {
         ASN1_CHK_ADD( len, asn1_write_ia5_string( p, start,
                                                   (const char *) name,
                                                   name_len ) );
     }
     else
     {
         ASN1_CHK_ADD( len, asn1_write_printable_string( p, start,
                                                         (const char *) name,
                                                         name_len ) );
     }

     // Write OID
     //
     ASN1_CHK_ADD( len, asn1_write_oid( p, start, oid, oid_len ) );

     ASN1_CHK_ADD( len, asn1_write_len( p, start, len ) );
     ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_CONSTRUCTED | ASN1_SEQUENCE ) );

     ASN1_CHK_ADD( len, asn1_write_len( p, start, len ) );
     ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_CONSTRUCTED | ASN1_SET ) );

     return( (int) len );
 }

 int x509_write_names( unsigned char **p, unsigned char *start,
                       asn1_named_data *first )
 {
     int ret;
     size_t len = 0;
     asn1_named_data *cur = first;

     while( cur != NULL )
     {
         ASN1_CHK_ADD( len, x509_write_name( p, start, (char *) cur->oid.p,
                                             cur->oid.len,
                                             cur->val.p, cur->val.len ) );
         cur = cur->next;
     }

     ASN1_CHK_ADD( len, asn1_write_len( p, start, len ) );
     ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_CONSTRUCTED | ASN1_SEQUENCE ) );

     return( (int) len );
 }

 int x509_write_sig( unsigned char **p, unsigned char *start,
                     const char *oid, size_t oid_len,
                     unsigned char *sig, size_t size )
 {
     int ret;
     size_t len = 0;

     if( *p - start < (int) size + 1 )
         return( POLARSSL_ERR_ASN1_BUF_TOO_SMALL );

     len = size;
     (*p) -= len;
     memcpy( *p, sig, len );

     *--(*p) = 0;
     len += 1;

     ASN1_CHK_ADD( len, asn1_write_len( p, start, len ) );
     ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_BIT_STRING ) );

     // Write OID
     //
     ASN1_CHK_ADD( len, asn1_write_algorithm_identifier( p, start, oid,
                                                         oid_len, 0 ) );

     return( (int) len );
 }

 static int x509_write_extension( unsigned char **p, unsigned char *start,
                                  asn1_named_data *ext )
 {
     int ret;
     size_t len = 0;

     ASN1_CHK_ADD( len, asn1_write_raw_buffer( p, start, ext->val.p + 1,
                                               ext->val.len - 1 ) );
     ASN1_CHK_ADD( len, asn1_write_len( p, start, ext->val.len - 1 ) );
     ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_OCTET_STRING ) );

     if( ext->val.p[0] != 0 )
     {
         ASN1_CHK_ADD( len, asn1_write_bool( p, start, 1 ) );
     }

     ASN1_CHK_ADD( len, asn1_write_raw_buffer( p, start, ext->oid.p,
                                               ext->oid.len ) );
     ASN1_CHK_ADD( len, asn1_write_len( p, start, ext->oid.len ) );
     ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_OID ) );

     ASN1_CHK_ADD( len, asn1_write_len( p, start, len ) );
     ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_CONSTRUCTED | ASN1_SEQUENCE ) );

     return( (int) len );
 }

 /*
  * Extension  ::=  SEQUENCE  {
  *     extnID      OBJECT IDENTIFIER,
  *     critical    BOOLEAN DEFAULT FALSE,
  *     extnValue   OCTET STRING
  *                 -- contains the DER encoding of an ASN.1 value
  *                 -- corresponding to the extension type identified
  *                 -- by extnID
  *     }
  */
 int x509_write_extensions( unsigned char **p, unsigned char *start,
                            asn1_named_data *first )
 {
     int ret;
     size_t len = 0;
     asn1_named_data *cur_ext = first;

     while( cur_ext != NULL )
     {
         ASN1_CHK_ADD( len, x509_write_extension( p, start, cur_ext ) );
         cur_ext = cur_ext->next;
     }

     return( (int) len );
 }

 #endif /* POLARSSL_X509_CREATE_C */
	/*
	* X.509 base functions for creating certificates / CSRs
	*
	* Copyright (C) 2006-2013, Brainspark B.V.
	*
	* This file is part of PolarSSL (http://www.polarssl.org)
	* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
	*
	* All rights reserved.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License along
	* with this program; if not, write to the Free Software Foundation, Inc.,
	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	*/

	#include "polarssl/config.h"

	#if defined(POLARSSL_X509_CREATE_C)

	#include "polarssl/x509.h"
	#include "polarssl/asn1write.h"
	#include "polarssl/oid.h"

	#if defined(_MSC_VER) && !defined strncasecmp && !defined(EFIX64) && \
	!defined(EFI32)
	#define strncasecmp _strnicmp
	#endif

	int x509_string_to_names( asn1_named_data *head, const char name )
	{
	int ret = 0;
	const char s = name, c = s;
	const char *end = s + strlen( s );
	const char *oid = NULL;
	int in_tag = 1;
	asn1_named_data *cur;

	/* Clear existing chain if present */
	asn1_free_named_data_list( head );

	while( c <= end )
	{
	if( in_tag && *c == '=' )
	{
	if( c - s == 2 && strncasecmp( s, "CN", 2 ) == 0 )
	oid = OID_AT_CN;
	else if( c - s == 1 && strncasecmp( s, "C", 1 ) == 0 )
	oid = OID_AT_COUNTRY;
	else if( c - s == 1 && strncasecmp( s, "O", 1 ) == 0 )
	oid = OID_AT_ORGANIZATION;
	else if( c - s == 1 && strncasecmp( s, "L", 1 ) == 0 )
	oid = OID_AT_LOCALITY;
	else if( c - s == 1 && strncasecmp( s, "R", 1 ) == 0 )
	oid = OID_PKCS9_EMAIL;
	else if( c - s == 2 && strncasecmp( s, "OU", 2 ) == 0 )
	oid = OID_AT_ORG_UNIT;
	else if( c - s == 2 && strncasecmp( s, "ST", 2 ) == 0 )
	oid = OID_AT_STATE;
	else if( c - s == 12 && strncasecmp( s, "serialNumber", 12 ) == 0 )
	oid = OID_AT_SERIAL_NUMBER;
	else if( c - s == 13 && strncasecmp( s, "postalAddress", 13 ) == 0 )
	oid = OID_AT_POSTAL_ADDRESS;
	else if( c - s == 10 && strncasecmp( s, "postalCode", 10 ) == 0 )
	oid = OID_AT_POSTAL_CODE;
	else
	{
	ret = POLARSSL_ERR_X509_UNKNOWN_OID;
	goto exit;
	}

	s = c + 1;
	in_tag = 0;
	}

	if( !in_tag && ( *c == ',' \|\| c == end ) )
	{
	if( ( cur = asn1_store_named_data( head, oid, strlen( oid ),
	(unsigned char *) s,
	c - s ) ) == NULL )
	{
	return( POLARSSL_ERR_X509_MALLOC_FAILED );
	}

	while( c < end && *(c + 1) == ' ' )
	c++;

	s = c + 1;
	in_tag = 1;
	}
	c++;
	}

	exit:

	return( ret );
	}

	/* The first byte of the value in the asn1_named_data structure is reserved
	* to store the critical boolean for us
	*/
	int x509_set_extension( asn1_named_data *head, const char oid, size_t oid_len,
	int critical, const unsigned char *val, size_t val_len )
	{
	asn1_named_data *cur;

	if( ( cur = asn1_store_named_data( head, oid, oid_len,
	NULL, val_len + 1 ) ) == NULL )
	{
	return( POLARSSL_ERR_X509_MALLOC_FAILED );
	}

	cur->val.p[0] = critical;
	memcpy( cur->val.p + 1, val, val_len );

	return( 0 );
	}

	/*
	* RelativeDistinguishedName ::=
	* SET OF AttributeTypeAndValue
	*
	* AttributeTypeAndValue ::= SEQUENCE {
	* type AttributeType,
	* value AttributeValue }
	*
	* AttributeType ::= OBJECT IDENTIFIER
	*
	* AttributeValue ::= ANY DEFINED BY AttributeType
	*/
	static int x509_write_name( unsigned char *p, unsigned char start,
	const char *oid, size_t oid_len,
	const unsigned char *name, size_t name_len )
	{
	int ret;
	size_t len = 0;

	// Write PrintableString for all except OID_PKCS9_EMAIL
	//
	if( OID_SIZE( OID_PKCS9_EMAIL ) == oid_len &&
	memcmp( oid, OID_PKCS9_EMAIL, oid_len ) == 0 )
	{
	ASN1_CHK_ADD( len, asn1_write_ia5_string( p, start,
	(const char *) name,
	name_len ) );
	}
	else
	{
	ASN1_CHK_ADD( len, asn1_write_printable_string( p, start,
	(const char *) name,
	name_len ) );
	}

	// Write OID
	//
	ASN1_CHK_ADD( len, asn1_write_oid( p, start, oid, oid_len ) );

	ASN1_CHK_ADD( len, asn1_write_len( p, start, len ) );
	ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_CONSTRUCTED \| ASN1_SEQUENCE ) );

	ASN1_CHK_ADD( len, asn1_write_len( p, start, len ) );
	ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_CONSTRUCTED \| ASN1_SET ) );

	return( (int) len );
	}

	int x509_write_names( unsigned char *p, unsigned char start,
	asn1_named_data *first )
	{
	int ret;
	size_t len = 0;
	asn1_named_data *cur = first;

	while( cur != NULL )
	{
	ASN1_CHK_ADD( len, x509_write_name( p, start, (char *) cur->oid.p,
	cur->oid.len,
	cur->val.p, cur->val.len ) );
	cur = cur->next;
	}

	ASN1_CHK_ADD( len, asn1_write_len( p, start, len ) );
	ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_CONSTRUCTED \| ASN1_SEQUENCE ) );

	return( (int) len );
	}

	int x509_write_sig( unsigned char *p, unsigned char start,
	const char *oid, size_t oid_len,
	unsigned char *sig, size_t size )
	{
	int ret;
	size_t len = 0;

	if( *p - start < (int) size + 1 )
	return( POLARSSL_ERR_ASN1_BUF_TOO_SMALL );

	len = size;
	(*p) -= len;
	memcpy( *p, sig, len );

	--(p) = 0;
	len += 1;

	ASN1_CHK_ADD( len, asn1_write_len( p, start, len ) );
	ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_BIT_STRING ) );

	// Write OID
	//
	ASN1_CHK_ADD( len, asn1_write_algorithm_identifier( p, start, oid,
	oid_len, 0 ) );

	return( (int) len );
	}

	static int x509_write_extension( unsigned char *p, unsigned char start,
	asn1_named_data *ext )
	{
	int ret;
	size_t len = 0;

	ASN1_CHK_ADD( len, asn1_write_raw_buffer( p, start, ext->val.p + 1,
	ext->val.len - 1 ) );
	ASN1_CHK_ADD( len, asn1_write_len( p, start, ext->val.len - 1 ) );
	ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_OCTET_STRING ) );

	if( ext->val.p[0] != 0 )
	{
	ASN1_CHK_ADD( len, asn1_write_bool( p, start, 1 ) );
	}

	ASN1_CHK_ADD( len, asn1_write_raw_buffer( p, start, ext->oid.p,
	ext->oid.len ) );
	ASN1_CHK_ADD( len, asn1_write_len( p, start, ext->oid.len ) );
	ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_OID ) );

	ASN1_CHK_ADD( len, asn1_write_len( p, start, len ) );
	ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_CONSTRUCTED \| ASN1_SEQUENCE ) );

	return( (int) len );
	}

	/*
	* Extension ::= SEQUENCE {
	* extnID OBJECT IDENTIFIER,
	* critical BOOLEAN DEFAULT FALSE,
	* extnValue OCTET STRING
	* -- contains the DER encoding of an ASN.1 value
	* -- corresponding to the extension type identified
	* -- by extnID
	* }
	*/
	int x509_write_extensions( unsigned char *p, unsigned char start,
	asn1_named_data *first )
	{
	int ret;
	size_t len = 0;
	asn1_named_data *cur_ext = first;

	while( cur_ext != NULL )
	{
	ASN1_CHK_ADD( len, x509_write_extension( p, start, cur_ext ) );
	cur_ext = cur_ext->next;
	}

	return( (int) len );
	}

	#endif /* POLARSSL_X509_CREATE_C */