Split up X509 files into smaller modules
diff --git a/library/x509_create.c b/library/x509_create.c
new file mode 100644
index 0000000..6991161
--- /dev/null
+++ b/library/x509_create.c
@@ -0,0 +1,267 @@
+/*
+ * 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"
+
+int x509write_string_to_names( asn1_named_data **head, char *name )
+{
+ int ret = 0;
+ char *s = name, *c = s;
+ char *end = s + strlen( s );
+ 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( memcmp( s, "CN", 2 ) == 0 && c - s == 2 )
+ oid = OID_AT_CN;
+ else if( memcmp( s, "C", 1 ) == 0 && c - s == 1 )
+ oid = OID_AT_COUNTRY;
+ else if( memcmp( s, "O", 1 ) == 0 && c - s == 1 )
+ oid = OID_AT_ORGANIZATION;
+ else if( memcmp( s, "L", 1 ) == 0 && c - s == 1 )
+ oid = OID_AT_LOCALITY;
+ else if( memcmp( s, "R", 1 ) == 0 && c - s == 1 )
+ oid = OID_PKCS9_EMAIL;
+ else if( memcmp( s, "OU", 2 ) == 0 && c - s == 2 )
+ oid = OID_AT_ORG_UNIT;
+ else if( memcmp( s, "ST", 2 ) == 0 && c - s == 2 )
+ oid = OID_AT_STATE;
+ else
+ {
+ ret = POLARSSL_ERR_X509WRITE_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_X509WRITE_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_X509WRITE_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( 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( 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( 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( 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( len );
+}
+
+#endif /* POLARSSL_X509_CREATE_C */