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mbedtls/library/x509_create.c

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/*
* 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;
/* 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 == 10 && strncasecmp( s, "commonName", 10 ) == 0 )
oid = OID_AT_CN;
else if( c - s == 1 && strncasecmp( s, "C", 1 ) == 0 )
oid = OID_AT_COUNTRY;
else if( c - s == 11 && strncasecmp( s, "countryName", 11 ) == 0 )
oid = OID_AT_COUNTRY;
else if( c - s == 1 && strncasecmp( s, "O", 1 ) == 0 )
oid = OID_AT_ORGANIZATION;
else if( c - s == 16 && strncasecmp( s, "organizationName", 16 ) == 0 )
oid = OID_AT_ORGANIZATION;
else if( c - s == 1 && strncasecmp( s, "L", 1 ) == 0 )
oid = OID_AT_LOCALITY;
else if( c - s == 8 && strncasecmp( s, "locality", 8 ) == 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 == 22 && strncasecmp( s, "organizationalUnitName", 22 ) == 0 )
oid = OID_AT_ORG_UNIT;
else if( c - s == 2 && strncasecmp( s, "ST", 2 ) == 0 )
oid = OID_AT_STATE;
else if( c - s == 19 && strncasecmp( s, "stateOrProvinceName", 19 ) == 0 )
oid = OID_AT_STATE;
else if( c - s == 12 && strncasecmp( s, "emailAddress", 12 ) == 0 )
oid = OID_PKCS9_EMAIL;
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 if( c - s == 11 && strncasecmp( s, "dnQualifier", 11 ) == 0 )
oid = OID_AT_DN_QUALIFIER;
else if( c - s == 5 && strncasecmp( s, "title", 5 ) == 0 )
oid = OID_AT_TITLE;
else if( c - s == 7 && strncasecmp( s, "surName", 7 ) == 0 )
oid = OID_AT_SUR_NAME;
else if( c - s == 2 && strncasecmp( s, "SN", 2 ) == 0 )
oid = OID_AT_SUR_NAME;
else if( c - s == 9 && strncasecmp( s, "givenName", 9 ) == 0 )
oid = OID_AT_GIVEN_NAME;
else if( c - s == 2 && strncasecmp( s, "GN", 2 ) == 0 )
oid = OID_AT_GIVEN_NAME;
else if( c - s == 8 && strncasecmp( s, "initials", 8 ) == 0 )
oid = OID_AT_INITIALS;
else if( c - s == 9 && strncasecmp( s, "pseudonym", 9 ) == 0 )
oid = OID_AT_PSEUDONYM;
else if( c - s == 19 && strncasecmp( s, "generationQualifier", 19 ) == 0 )
oid = OID_AT_GENERATION_QUALIFIER;
else if( c - s == 15 && strncasecmp( s, "domainComponent", 15 ) == 0 )
oid = OID_DOMAIN_COMPONENT;
else if( c - s == 2 && strncasecmp( s, "DC", 2 ) == 0 )
oid = OID_DOMAIN_COMPONENT;
else
{
ret = POLARSSL_ERR_X509_UNKNOWN_OID;
goto exit;
}
s = c + 1;
in_tag = 0;
}
if( !in_tag && ( *c == ',' || c == end ) )
{
if( 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 */
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