mirror of
https://github.com/yuzu-emu/mbedtls.git
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268 lines
8 KiB
C
268 lines
8 KiB
C
/*
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* X.509 base functions for creating certificates / CSRs
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*
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* Copyright (C) 2006-2013, Brainspark B.V.
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*
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* This file is part of PolarSSL (http://www.polarssl.org)
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* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "polarssl/config.h"
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#if defined(POLARSSL_X509_CREATE_C)
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#include "polarssl/x509.h"
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#include "polarssl/asn1write.h"
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#include "polarssl/oid.h"
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int x509_string_to_names( asn1_named_data **head, char *name )
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{
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int ret = 0;
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char *s = name, *c = s;
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char *end = s + strlen( s );
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const char *oid = NULL;
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int in_tag = 1;
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asn1_named_data *cur;
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/* Clear existing chain if present */
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asn1_free_named_data_list( head );
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while( c <= end )
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{
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if( in_tag && *c == '=' )
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{
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if( memcmp( s, "CN", 2 ) == 0 && c - s == 2 )
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oid = OID_AT_CN;
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else if( memcmp( s, "C", 1 ) == 0 && c - s == 1 )
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oid = OID_AT_COUNTRY;
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else if( memcmp( s, "O", 1 ) == 0 && c - s == 1 )
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oid = OID_AT_ORGANIZATION;
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else if( memcmp( s, "L", 1 ) == 0 && c - s == 1 )
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oid = OID_AT_LOCALITY;
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else if( memcmp( s, "R", 1 ) == 0 && c - s == 1 )
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oid = OID_PKCS9_EMAIL;
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else if( memcmp( s, "OU", 2 ) == 0 && c - s == 2 )
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oid = OID_AT_ORG_UNIT;
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else if( memcmp( s, "ST", 2 ) == 0 && c - s == 2 )
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oid = OID_AT_STATE;
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else
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{
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ret = POLARSSL_ERR_X509_UNKNOWN_OID;
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goto exit;
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}
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s = c + 1;
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in_tag = 0;
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}
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if( !in_tag && ( *c == ',' || c == end ) )
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{
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if( ( cur = asn1_store_named_data( head, oid, strlen( oid ),
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(unsigned char *) s,
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c - s ) ) == NULL )
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{
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return( POLARSSL_ERR_X509_MALLOC_FAILED );
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}
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while( c < end && *(c + 1) == ' ' )
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c++;
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s = c + 1;
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in_tag = 1;
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}
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c++;
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}
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exit:
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return( ret );
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}
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/* The first byte of the value in the asn1_named_data structure is reserved
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* to store the critical boolean for us
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*/
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int x509_set_extension( asn1_named_data **head, const char *oid, size_t oid_len,
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int critical, const unsigned char *val, size_t val_len )
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{
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asn1_named_data *cur;
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if( ( cur = asn1_store_named_data( head, oid, oid_len,
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NULL, val_len + 1 ) ) == NULL )
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{
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return( POLARSSL_ERR_X509_MALLOC_FAILED );
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}
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cur->val.p[0] = critical;
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memcpy( cur->val.p + 1, val, val_len );
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return( 0 );
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}
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/*
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* RelativeDistinguishedName ::=
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* SET OF AttributeTypeAndValue
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*
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* AttributeTypeAndValue ::= SEQUENCE {
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* type AttributeType,
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* value AttributeValue }
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*
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* AttributeType ::= OBJECT IDENTIFIER
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*
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* AttributeValue ::= ANY DEFINED BY AttributeType
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*/
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static int x509_write_name( unsigned char **p, unsigned char *start,
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const char *oid, size_t oid_len,
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const unsigned char *name, size_t name_len )
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{
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int ret;
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size_t len = 0;
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// Write PrintableString for all except OID_PKCS9_EMAIL
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//
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if( OID_SIZE( OID_PKCS9_EMAIL ) == oid_len &&
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memcmp( oid, OID_PKCS9_EMAIL, oid_len ) == 0 )
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{
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ASN1_CHK_ADD( len, asn1_write_ia5_string( p, start,
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(const char *) name,
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name_len ) );
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}
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else
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{
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ASN1_CHK_ADD( len, asn1_write_printable_string( p, start,
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(const char *) name,
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name_len ) );
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}
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// Write OID
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//
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ASN1_CHK_ADD( len, asn1_write_oid( p, start, oid, oid_len ) );
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ASN1_CHK_ADD( len, asn1_write_len( p, start, len ) );
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ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_CONSTRUCTED | ASN1_SEQUENCE ) );
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ASN1_CHK_ADD( len, asn1_write_len( p, start, len ) );
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ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_CONSTRUCTED | ASN1_SET ) );
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return( (int) len );
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}
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int x509_write_names( unsigned char **p, unsigned char *start,
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asn1_named_data *first )
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{
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int ret;
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size_t len = 0;
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asn1_named_data *cur = first;
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while( cur != NULL )
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{
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ASN1_CHK_ADD( len, x509_write_name( p, start, (char *) cur->oid.p,
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cur->oid.len,
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cur->val.p, cur->val.len ) );
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cur = cur->next;
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}
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ASN1_CHK_ADD( len, asn1_write_len( p, start, len ) );
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ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_CONSTRUCTED | ASN1_SEQUENCE ) );
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return( (int) len );
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}
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int x509_write_sig( unsigned char **p, unsigned char *start,
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const char *oid, size_t oid_len,
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unsigned char *sig, size_t size )
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{
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int ret;
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size_t len = 0;
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if( *p - start < (int) size + 1 )
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return( POLARSSL_ERR_ASN1_BUF_TOO_SMALL );
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len = size;
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(*p) -= len;
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memcpy( *p, sig, len );
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*--(*p) = 0;
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len += 1;
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ASN1_CHK_ADD( len, asn1_write_len( p, start, len ) );
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ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_BIT_STRING ) );
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// Write OID
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//
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ASN1_CHK_ADD( len, asn1_write_algorithm_identifier( p, start, oid,
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oid_len, 0 ) );
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return( (int) len );
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}
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static int x509_write_extension( unsigned char **p, unsigned char *start,
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asn1_named_data *ext )
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{
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int ret;
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size_t len = 0;
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ASN1_CHK_ADD( len, asn1_write_raw_buffer( p, start, ext->val.p + 1,
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ext->val.len - 1 ) );
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ASN1_CHK_ADD( len, asn1_write_len( p, start, ext->val.len - 1 ) );
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ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_OCTET_STRING ) );
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if( ext->val.p[0] != 0 )
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{
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ASN1_CHK_ADD( len, asn1_write_bool( p, start, 1 ) );
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}
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ASN1_CHK_ADD( len, asn1_write_raw_buffer( p, start, ext->oid.p,
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ext->oid.len ) );
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ASN1_CHK_ADD( len, asn1_write_len( p, start, ext->oid.len ) );
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ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_OID ) );
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ASN1_CHK_ADD( len, asn1_write_len( p, start, len ) );
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ASN1_CHK_ADD( len, asn1_write_tag( p, start, ASN1_CONSTRUCTED | ASN1_SEQUENCE ) );
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return( (int) len );
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}
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/*
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* Extension ::= SEQUENCE {
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* extnID OBJECT IDENTIFIER,
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* critical BOOLEAN DEFAULT FALSE,
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* extnValue OCTET STRING
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* -- contains the DER encoding of an ASN.1 value
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* -- corresponding to the extension type identified
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* -- by extnID
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* }
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*/
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int x509_write_extensions( unsigned char **p, unsigned char *start,
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asn1_named_data *first )
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{
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int ret;
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size_t len = 0;
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asn1_named_data *cur_ext = first;
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while( cur_ext != NULL )
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{
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ASN1_CHK_ADD( len, x509_write_extension( p, start, cur_ext ) );
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cur_ext = cur_ext->next;
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}
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return( (int) len );
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}
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#endif /* POLARSSL_X509_CREATE_C */
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