Timothy Beight / Mbed 2 deprecated 6_songs-from-the-cloud

This is a fork due to permission issues

Dependencies:   mbed Socket lwip-eth lwip-sys lwip

Fork of 6_songs-from-the-cloud by MakingMusicWorkshop

mbed-client/mbedtls/source/x509_create.c@0:f7c60d3e7b8a, 2016-05-18 (annotated)

Committer:
maclobdell
Date:
Wed May 18 19:06:32 2016 +0000
Revision:
0:f7c60d3e7b8a
clean version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
maclobdell 0:f7c60d3e7b8a 1 /*
maclobdell 0:f7c60d3e7b8a 2 * X.509 base functions for creating certificates / CSRs
maclobdell 0:f7c60d3e7b8a 3 *
maclobdell 0:f7c60d3e7b8a 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
maclobdell 0:f7c60d3e7b8a 5 * SPDX-License-Identifier: Apache-2.0
maclobdell 0:f7c60d3e7b8a 6 *
maclobdell 0:f7c60d3e7b8a 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
maclobdell 0:f7c60d3e7b8a 8 * not use this file except in compliance with the License.
maclobdell 0:f7c60d3e7b8a 9 * You may obtain a copy of the License at
maclobdell 0:f7c60d3e7b8a 10 *
maclobdell 0:f7c60d3e7b8a 11 * http://www.apache.org/licenses/LICENSE-2.0
maclobdell 0:f7c60d3e7b8a 12 *
maclobdell 0:f7c60d3e7b8a 13 * Unless required by applicable law or agreed to in writing, software
maclobdell 0:f7c60d3e7b8a 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
maclobdell 0:f7c60d3e7b8a 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
maclobdell 0:f7c60d3e7b8a 16 * See the License for the specific language governing permissions and
maclobdell 0:f7c60d3e7b8a 17 * limitations under the License.
maclobdell 0:f7c60d3e7b8a 18 *
maclobdell 0:f7c60d3e7b8a 19 * This file is part of mbed TLS (https://tls.mbed.org)
maclobdell 0:f7c60d3e7b8a 20 */
maclobdell 0:f7c60d3e7b8a 21
maclobdell 0:f7c60d3e7b8a 22 #if !defined(MBEDTLS_CONFIG_FILE)
maclobdell 0:f7c60d3e7b8a 23 #include "mbedtls/config.h"
maclobdell 0:f7c60d3e7b8a 24 #else
maclobdell 0:f7c60d3e7b8a 25 #include MBEDTLS_CONFIG_FILE
maclobdell 0:f7c60d3e7b8a 26 #endif
maclobdell 0:f7c60d3e7b8a 27
maclobdell 0:f7c60d3e7b8a 28 #if defined(MBEDTLS_X509_CREATE_C)
maclobdell 0:f7c60d3e7b8a 29
maclobdell 0:f7c60d3e7b8a 30 #include "mbedtls/x509.h"
maclobdell 0:f7c60d3e7b8a 31 #include "mbedtls/asn1write.h"
maclobdell 0:f7c60d3e7b8a 32 #include "mbedtls/oid.h"
maclobdell 0:f7c60d3e7b8a 33
maclobdell 0:f7c60d3e7b8a 34 #include <string.h>
maclobdell 0:f7c60d3e7b8a 35
maclobdell 0:f7c60d3e7b8a 36 typedef struct {
maclobdell 0:f7c60d3e7b8a 37 const char *name;
maclobdell 0:f7c60d3e7b8a 38 size_t name_len;
maclobdell 0:f7c60d3e7b8a 39 const char*oid;
maclobdell 0:f7c60d3e7b8a 40 } x509_attr_descriptor_t;
maclobdell 0:f7c60d3e7b8a 41
maclobdell 0:f7c60d3e7b8a 42 #define ADD_STRLEN( s ) s, sizeof( s ) - 1
maclobdell 0:f7c60d3e7b8a 43
maclobdell 0:f7c60d3e7b8a 44 static const x509_attr_descriptor_t x509_attrs[] =
maclobdell 0:f7c60d3e7b8a 45 {
maclobdell 0:f7c60d3e7b8a 46 { ADD_STRLEN( "CN" ), MBEDTLS_OID_AT_CN },
maclobdell 0:f7c60d3e7b8a 47 { ADD_STRLEN( "commonName" ), MBEDTLS_OID_AT_CN },
maclobdell 0:f7c60d3e7b8a 48 { ADD_STRLEN( "C" ), MBEDTLS_OID_AT_COUNTRY },
maclobdell 0:f7c60d3e7b8a 49 { ADD_STRLEN( "countryName" ), MBEDTLS_OID_AT_COUNTRY },
maclobdell 0:f7c60d3e7b8a 50 { ADD_STRLEN( "O" ), MBEDTLS_OID_AT_ORGANIZATION },
maclobdell 0:f7c60d3e7b8a 51 { ADD_STRLEN( "organizationName" ), MBEDTLS_OID_AT_ORGANIZATION },
maclobdell 0:f7c60d3e7b8a 52 { ADD_STRLEN( "L" ), MBEDTLS_OID_AT_LOCALITY },
maclobdell 0:f7c60d3e7b8a 53 { ADD_STRLEN( "locality" ), MBEDTLS_OID_AT_LOCALITY },
maclobdell 0:f7c60d3e7b8a 54 { ADD_STRLEN( "R" ), MBEDTLS_OID_PKCS9_EMAIL },
maclobdell 0:f7c60d3e7b8a 55 { ADD_STRLEN( "OU" ), MBEDTLS_OID_AT_ORG_UNIT },
maclobdell 0:f7c60d3e7b8a 56 { ADD_STRLEN( "organizationalUnitName" ), MBEDTLS_OID_AT_ORG_UNIT },
maclobdell 0:f7c60d3e7b8a 57 { ADD_STRLEN( "ST" ), MBEDTLS_OID_AT_STATE },
maclobdell 0:f7c60d3e7b8a 58 { ADD_STRLEN( "stateOrProvinceName" ), MBEDTLS_OID_AT_STATE },
maclobdell 0:f7c60d3e7b8a 59 { ADD_STRLEN( "emailAddress" ), MBEDTLS_OID_PKCS9_EMAIL },
maclobdell 0:f7c60d3e7b8a 60 { ADD_STRLEN( "serialNumber" ), MBEDTLS_OID_AT_SERIAL_NUMBER },
maclobdell 0:f7c60d3e7b8a 61 { ADD_STRLEN( "postalAddress" ), MBEDTLS_OID_AT_POSTAL_ADDRESS },
maclobdell 0:f7c60d3e7b8a 62 { ADD_STRLEN( "postalCode" ), MBEDTLS_OID_AT_POSTAL_CODE },
maclobdell 0:f7c60d3e7b8a 63 { ADD_STRLEN( "dnQualifier" ), MBEDTLS_OID_AT_DN_QUALIFIER },
maclobdell 0:f7c60d3e7b8a 64 { ADD_STRLEN( "title" ), MBEDTLS_OID_AT_TITLE },
maclobdell 0:f7c60d3e7b8a 65 { ADD_STRLEN( "surName" ), MBEDTLS_OID_AT_SUR_NAME },
maclobdell 0:f7c60d3e7b8a 66 { ADD_STRLEN( "SN" ), MBEDTLS_OID_AT_SUR_NAME },
maclobdell 0:f7c60d3e7b8a 67 { ADD_STRLEN( "givenName" ), MBEDTLS_OID_AT_GIVEN_NAME },
maclobdell 0:f7c60d3e7b8a 68 { ADD_STRLEN( "GN" ), MBEDTLS_OID_AT_GIVEN_NAME },
maclobdell 0:f7c60d3e7b8a 69 { ADD_STRLEN( "initials" ), MBEDTLS_OID_AT_INITIALS },
maclobdell 0:f7c60d3e7b8a 70 { ADD_STRLEN( "pseudonym" ), MBEDTLS_OID_AT_PSEUDONYM },
maclobdell 0:f7c60d3e7b8a 71 { ADD_STRLEN( "generationQualifier" ), MBEDTLS_OID_AT_GENERATION_QUALIFIER },
maclobdell 0:f7c60d3e7b8a 72 { ADD_STRLEN( "domainComponent" ), MBEDTLS_OID_DOMAIN_COMPONENT },
maclobdell 0:f7c60d3e7b8a 73 { ADD_STRLEN( "DC" ), MBEDTLS_OID_DOMAIN_COMPONENT },
maclobdell 0:f7c60d3e7b8a 74 { NULL, 0, NULL }
maclobdell 0:f7c60d3e7b8a 75 };
maclobdell 0:f7c60d3e7b8a 76
maclobdell 0:f7c60d3e7b8a 77 static const char *x509_at_oid_from_name( const char *name, size_t name_len )
maclobdell 0:f7c60d3e7b8a 78 {
maclobdell 0:f7c60d3e7b8a 79 const x509_attr_descriptor_t *cur;
maclobdell 0:f7c60d3e7b8a 80
maclobdell 0:f7c60d3e7b8a 81 for( cur = x509_attrs; cur->name != NULL; cur++ )
maclobdell 0:f7c60d3e7b8a 82 if( cur->name_len == name_len &&
maclobdell 0:f7c60d3e7b8a 83 strncmp( cur->name, name, name_len ) == 0 )
maclobdell 0:f7c60d3e7b8a 84 break;
maclobdell 0:f7c60d3e7b8a 85
maclobdell 0:f7c60d3e7b8a 86 return( cur->oid );
maclobdell 0:f7c60d3e7b8a 87 }
maclobdell 0:f7c60d3e7b8a 88
maclobdell 0:f7c60d3e7b8a 89 int mbedtls_x509_string_to_names( mbedtls_asn1_named_data **head, const char *name )
maclobdell 0:f7c60d3e7b8a 90 {
maclobdell 0:f7c60d3e7b8a 91 int ret = 0;
maclobdell 0:f7c60d3e7b8a 92 const char *s = name, *c = s;
maclobdell 0:f7c60d3e7b8a 93 const char *end = s + strlen( s );
maclobdell 0:f7c60d3e7b8a 94 const char *oid = NULL;
maclobdell 0:f7c60d3e7b8a 95 int in_tag = 1;
maclobdell 0:f7c60d3e7b8a 96 char data[MBEDTLS_X509_MAX_DN_NAME_SIZE];
maclobdell 0:f7c60d3e7b8a 97 char *d = data;
maclobdell 0:f7c60d3e7b8a 98
maclobdell 0:f7c60d3e7b8a 99 /* Clear existing chain if present */
maclobdell 0:f7c60d3e7b8a 100 mbedtls_asn1_free_named_data_list( head );
maclobdell 0:f7c60d3e7b8a 101
maclobdell 0:f7c60d3e7b8a 102 while( c <= end )
maclobdell 0:f7c60d3e7b8a 103 {
maclobdell 0:f7c60d3e7b8a 104 if( in_tag && *c == '=' )
maclobdell 0:f7c60d3e7b8a 105 {
maclobdell 0:f7c60d3e7b8a 106 if( ( oid = x509_at_oid_from_name( s, c - s ) ) == NULL )
maclobdell 0:f7c60d3e7b8a 107 {
maclobdell 0:f7c60d3e7b8a 108 ret = MBEDTLS_ERR_X509_UNKNOWN_OID;
maclobdell 0:f7c60d3e7b8a 109 goto exit;
maclobdell 0:f7c60d3e7b8a 110 }
maclobdell 0:f7c60d3e7b8a 111
maclobdell 0:f7c60d3e7b8a 112 s = c + 1;
maclobdell 0:f7c60d3e7b8a 113 in_tag = 0;
maclobdell 0:f7c60d3e7b8a 114 d = data;
maclobdell 0:f7c60d3e7b8a 115 }
maclobdell 0:f7c60d3e7b8a 116
maclobdell 0:f7c60d3e7b8a 117 if( !in_tag && *c == '\\' && c != end )
maclobdell 0:f7c60d3e7b8a 118 {
maclobdell 0:f7c60d3e7b8a 119 c++;
maclobdell 0:f7c60d3e7b8a 120
maclobdell 0:f7c60d3e7b8a 121 /* Check for valid escaped characters */
maclobdell 0:f7c60d3e7b8a 122 if( c == end || *c != ',' )
maclobdell 0:f7c60d3e7b8a 123 {
maclobdell 0:f7c60d3e7b8a 124 ret = MBEDTLS_ERR_X509_INVALID_NAME;
maclobdell 0:f7c60d3e7b8a 125 goto exit;
maclobdell 0:f7c60d3e7b8a 126 }
maclobdell 0:f7c60d3e7b8a 127 }
maclobdell 0:f7c60d3e7b8a 128 else if( !in_tag && ( *c == ',' || c == end ) )
maclobdell 0:f7c60d3e7b8a 129 {
maclobdell 0:f7c60d3e7b8a 130 if( mbedtls_asn1_store_named_data( head, oid, strlen( oid ),
maclobdell 0:f7c60d3e7b8a 131 (unsigned char *) data,
maclobdell 0:f7c60d3e7b8a 132 d - data ) == NULL )
maclobdell 0:f7c60d3e7b8a 133 {
maclobdell 0:f7c60d3e7b8a 134 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
maclobdell 0:f7c60d3e7b8a 135 }
maclobdell 0:f7c60d3e7b8a 136
maclobdell 0:f7c60d3e7b8a 137 while( c < end && *(c + 1) == ' ' )
maclobdell 0:f7c60d3e7b8a 138 c++;
maclobdell 0:f7c60d3e7b8a 139
maclobdell 0:f7c60d3e7b8a 140 s = c + 1;
maclobdell 0:f7c60d3e7b8a 141 in_tag = 1;
maclobdell 0:f7c60d3e7b8a 142 }
maclobdell 0:f7c60d3e7b8a 143
maclobdell 0:f7c60d3e7b8a 144 if( !in_tag && s != c + 1 )
maclobdell 0:f7c60d3e7b8a 145 {
maclobdell 0:f7c60d3e7b8a 146 *(d++) = *c;
maclobdell 0:f7c60d3e7b8a 147
maclobdell 0:f7c60d3e7b8a 148 if( d - data == MBEDTLS_X509_MAX_DN_NAME_SIZE )
maclobdell 0:f7c60d3e7b8a 149 {
maclobdell 0:f7c60d3e7b8a 150 ret = MBEDTLS_ERR_X509_INVALID_NAME;
maclobdell 0:f7c60d3e7b8a 151 goto exit;
maclobdell 0:f7c60d3e7b8a 152 }
maclobdell 0:f7c60d3e7b8a 153 }
maclobdell 0:f7c60d3e7b8a 154
maclobdell 0:f7c60d3e7b8a 155 c++;
maclobdell 0:f7c60d3e7b8a 156 }
maclobdell 0:f7c60d3e7b8a 157
maclobdell 0:f7c60d3e7b8a 158 exit:
maclobdell 0:f7c60d3e7b8a 159
maclobdell 0:f7c60d3e7b8a 160 return( ret );
maclobdell 0:f7c60d3e7b8a 161 }
maclobdell 0:f7c60d3e7b8a 162
maclobdell 0:f7c60d3e7b8a 163 /* The first byte of the value in the mbedtls_asn1_named_data structure is reserved
maclobdell 0:f7c60d3e7b8a 164 * to store the critical boolean for us
maclobdell 0:f7c60d3e7b8a 165 */
maclobdell 0:f7c60d3e7b8a 166 int mbedtls_x509_set_extension( mbedtls_asn1_named_data **head, const char *oid, size_t oid_len,
maclobdell 0:f7c60d3e7b8a 167 int critical, const unsigned char *val, size_t val_len )
maclobdell 0:f7c60d3e7b8a 168 {
maclobdell 0:f7c60d3e7b8a 169 mbedtls_asn1_named_data *cur;
maclobdell 0:f7c60d3e7b8a 170
maclobdell 0:f7c60d3e7b8a 171 if( ( cur = mbedtls_asn1_store_named_data( head, oid, oid_len,
maclobdell 0:f7c60d3e7b8a 172 NULL, val_len + 1 ) ) == NULL )
maclobdell 0:f7c60d3e7b8a 173 {
maclobdell 0:f7c60d3e7b8a 174 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
maclobdell 0:f7c60d3e7b8a 175 }
maclobdell 0:f7c60d3e7b8a 176
maclobdell 0:f7c60d3e7b8a 177 cur->val.p[0] = critical;
maclobdell 0:f7c60d3e7b8a 178 memcpy( cur->val.p + 1, val, val_len );
maclobdell 0:f7c60d3e7b8a 179
maclobdell 0:f7c60d3e7b8a 180 return( 0 );
maclobdell 0:f7c60d3e7b8a 181 }
maclobdell 0:f7c60d3e7b8a 182
maclobdell 0:f7c60d3e7b8a 183 /*
maclobdell 0:f7c60d3e7b8a 184 * RelativeDistinguishedName ::=
maclobdell 0:f7c60d3e7b8a 185 * SET OF AttributeTypeAndValue
maclobdell 0:f7c60d3e7b8a 186 *
maclobdell 0:f7c60d3e7b8a 187 * AttributeTypeAndValue ::= SEQUENCE {
maclobdell 0:f7c60d3e7b8a 188 * type AttributeType,
maclobdell 0:f7c60d3e7b8a 189 * value AttributeValue }
maclobdell 0:f7c60d3e7b8a 190 *
maclobdell 0:f7c60d3e7b8a 191 * AttributeType ::= OBJECT IDENTIFIER
maclobdell 0:f7c60d3e7b8a 192 *
maclobdell 0:f7c60d3e7b8a 193 * AttributeValue ::= ANY DEFINED BY AttributeType
maclobdell 0:f7c60d3e7b8a 194 */
maclobdell 0:f7c60d3e7b8a 195 static int x509_write_name( unsigned char **p, unsigned char *start,
maclobdell 0:f7c60d3e7b8a 196 const char *oid, size_t oid_len,
maclobdell 0:f7c60d3e7b8a 197 const unsigned char *name, size_t name_len )
maclobdell 0:f7c60d3e7b8a 198 {
maclobdell 0:f7c60d3e7b8a 199 int ret;
maclobdell 0:f7c60d3e7b8a 200 size_t len = 0;
maclobdell 0:f7c60d3e7b8a 201
maclobdell 0:f7c60d3e7b8a 202 // Write PrintableString for all except MBEDTLS_OID_PKCS9_EMAIL
maclobdell 0:f7c60d3e7b8a 203 //
maclobdell 0:f7c60d3e7b8a 204 if( MBEDTLS_OID_SIZE( MBEDTLS_OID_PKCS9_EMAIL ) == oid_len &&
maclobdell 0:f7c60d3e7b8a 205 memcmp( oid, MBEDTLS_OID_PKCS9_EMAIL, oid_len ) == 0 )
maclobdell 0:f7c60d3e7b8a 206 {
maclobdell 0:f7c60d3e7b8a 207 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_ia5_string( p, start,
maclobdell 0:f7c60d3e7b8a 208 (const char *) name,
maclobdell 0:f7c60d3e7b8a 209 name_len ) );
maclobdell 0:f7c60d3e7b8a 210 }
maclobdell 0:f7c60d3e7b8a 211 else
maclobdell 0:f7c60d3e7b8a 212 {
maclobdell 0:f7c60d3e7b8a 213 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_printable_string( p, start,
maclobdell 0:f7c60d3e7b8a 214 (const char *) name,
maclobdell 0:f7c60d3e7b8a 215 name_len ) );
maclobdell 0:f7c60d3e7b8a 216 }
maclobdell 0:f7c60d3e7b8a 217
maclobdell 0:f7c60d3e7b8a 218 // Write OID
maclobdell 0:f7c60d3e7b8a 219 //
maclobdell 0:f7c60d3e7b8a 220 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_oid( p, start, oid, oid_len ) );
maclobdell 0:f7c60d3e7b8a 221
maclobdell 0:f7c60d3e7b8a 222 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
maclobdell 0:f7c60d3e7b8a 223 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
maclobdell 0:f7c60d3e7b8a 224 MBEDTLS_ASN1_SEQUENCE ) );
maclobdell 0:f7c60d3e7b8a 225
maclobdell 0:f7c60d3e7b8a 226 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
maclobdell 0:f7c60d3e7b8a 227 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
maclobdell 0:f7c60d3e7b8a 228 MBEDTLS_ASN1_SET ) );
maclobdell 0:f7c60d3e7b8a 229
maclobdell 0:f7c60d3e7b8a 230 return( (int) len );
maclobdell 0:f7c60d3e7b8a 231 }
maclobdell 0:f7c60d3e7b8a 232
maclobdell 0:f7c60d3e7b8a 233 int mbedtls_x509_write_names( unsigned char **p, unsigned char *start,
maclobdell 0:f7c60d3e7b8a 234 mbedtls_asn1_named_data *first )
maclobdell 0:f7c60d3e7b8a 235 {
maclobdell 0:f7c60d3e7b8a 236 int ret;
maclobdell 0:f7c60d3e7b8a 237 size_t len = 0;
maclobdell 0:f7c60d3e7b8a 238 mbedtls_asn1_named_data *cur = first;
maclobdell 0:f7c60d3e7b8a 239
maclobdell 0:f7c60d3e7b8a 240 while( cur != NULL )
maclobdell 0:f7c60d3e7b8a 241 {
maclobdell 0:f7c60d3e7b8a 242 MBEDTLS_ASN1_CHK_ADD( len, x509_write_name( p, start, (char *) cur->oid.p,
maclobdell 0:f7c60d3e7b8a 243 cur->oid.len,
maclobdell 0:f7c60d3e7b8a 244 cur->val.p, cur->val.len ) );
maclobdell 0:f7c60d3e7b8a 245 cur = cur->next;
maclobdell 0:f7c60d3e7b8a 246 }
maclobdell 0:f7c60d3e7b8a 247
maclobdell 0:f7c60d3e7b8a 248 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
maclobdell 0:f7c60d3e7b8a 249 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
maclobdell 0:f7c60d3e7b8a 250 MBEDTLS_ASN1_SEQUENCE ) );
maclobdell 0:f7c60d3e7b8a 251
maclobdell 0:f7c60d3e7b8a 252 return( (int) len );
maclobdell 0:f7c60d3e7b8a 253 }
maclobdell 0:f7c60d3e7b8a 254
maclobdell 0:f7c60d3e7b8a 255 int mbedtls_x509_write_sig( unsigned char **p, unsigned char *start,
maclobdell 0:f7c60d3e7b8a 256 const char *oid, size_t oid_len,
maclobdell 0:f7c60d3e7b8a 257 unsigned char *sig, size_t size )
maclobdell 0:f7c60d3e7b8a 258 {
maclobdell 0:f7c60d3e7b8a 259 int ret;
maclobdell 0:f7c60d3e7b8a 260 size_t len = 0;
maclobdell 0:f7c60d3e7b8a 261
maclobdell 0:f7c60d3e7b8a 262 if( *p < start || (size_t)( *p - start ) < size )
maclobdell 0:f7c60d3e7b8a 263 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
maclobdell 0:f7c60d3e7b8a 264
maclobdell 0:f7c60d3e7b8a 265 len = size;
maclobdell 0:f7c60d3e7b8a 266 (*p) -= len;
maclobdell 0:f7c60d3e7b8a 267 memcpy( *p, sig, len );
maclobdell 0:f7c60d3e7b8a 268
maclobdell 0:f7c60d3e7b8a 269 if( *p - start < 1 )
maclobdell 0:f7c60d3e7b8a 270 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
maclobdell 0:f7c60d3e7b8a 271
maclobdell 0:f7c60d3e7b8a 272 *--(*p) = 0;
maclobdell 0:f7c60d3e7b8a 273 len += 1;
maclobdell 0:f7c60d3e7b8a 274
maclobdell 0:f7c60d3e7b8a 275 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
maclobdell 0:f7c60d3e7b8a 276 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_BIT_STRING ) );
maclobdell 0:f7c60d3e7b8a 277
maclobdell 0:f7c60d3e7b8a 278 // Write OID
maclobdell 0:f7c60d3e7b8a 279 //
maclobdell 0:f7c60d3e7b8a 280 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_algorithm_identifier( p, start, oid,
maclobdell 0:f7c60d3e7b8a 281 oid_len, 0 ) );
maclobdell 0:f7c60d3e7b8a 282
maclobdell 0:f7c60d3e7b8a 283 return( (int) len );
maclobdell 0:f7c60d3e7b8a 284 }
maclobdell 0:f7c60d3e7b8a 285
maclobdell 0:f7c60d3e7b8a 286 static int x509_write_extension( unsigned char **p, unsigned char *start,
maclobdell 0:f7c60d3e7b8a 287 mbedtls_asn1_named_data *ext )
maclobdell 0:f7c60d3e7b8a 288 {
maclobdell 0:f7c60d3e7b8a 289 int ret;
maclobdell 0:f7c60d3e7b8a 290 size_t len = 0;
maclobdell 0:f7c60d3e7b8a 291
maclobdell 0:f7c60d3e7b8a 292 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start, ext->val.p + 1,
maclobdell 0:f7c60d3e7b8a 293 ext->val.len - 1 ) );
maclobdell 0:f7c60d3e7b8a 294 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, ext->val.len - 1 ) );
maclobdell 0:f7c60d3e7b8a 295 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OCTET_STRING ) );
maclobdell 0:f7c60d3e7b8a 296
maclobdell 0:f7c60d3e7b8a 297 if( ext->val.p[0] != 0 )
maclobdell 0:f7c60d3e7b8a 298 {
maclobdell 0:f7c60d3e7b8a 299 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_bool( p, start, 1 ) );
maclobdell 0:f7c60d3e7b8a 300 }
maclobdell 0:f7c60d3e7b8a 301
maclobdell 0:f7c60d3e7b8a 302 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start, ext->oid.p,
maclobdell 0:f7c60d3e7b8a 303 ext->oid.len ) );
maclobdell 0:f7c60d3e7b8a 304 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, ext->oid.len ) );
maclobdell 0:f7c60d3e7b8a 305 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OID ) );
maclobdell 0:f7c60d3e7b8a 306
maclobdell 0:f7c60d3e7b8a 307 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
maclobdell 0:f7c60d3e7b8a 308 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
maclobdell 0:f7c60d3e7b8a 309 MBEDTLS_ASN1_SEQUENCE ) );
maclobdell 0:f7c60d3e7b8a 310
maclobdell 0:f7c60d3e7b8a 311 return( (int) len );
maclobdell 0:f7c60d3e7b8a 312 }
maclobdell 0:f7c60d3e7b8a 313
maclobdell 0:f7c60d3e7b8a 314 /*
maclobdell 0:f7c60d3e7b8a 315 * Extension ::= SEQUENCE {
maclobdell 0:f7c60d3e7b8a 316 * extnID OBJECT IDENTIFIER,
maclobdell 0:f7c60d3e7b8a 317 * critical BOOLEAN DEFAULT FALSE,
maclobdell 0:f7c60d3e7b8a 318 * extnValue OCTET STRING
maclobdell 0:f7c60d3e7b8a 319 * -- contains the DER encoding of an ASN.1 value
maclobdell 0:f7c60d3e7b8a 320 * -- corresponding to the extension type identified
maclobdell 0:f7c60d3e7b8a 321 * -- by extnID
maclobdell 0:f7c60d3e7b8a 322 * }
maclobdell 0:f7c60d3e7b8a 323 */
maclobdell 0:f7c60d3e7b8a 324 int mbedtls_x509_write_extensions( unsigned char **p, unsigned char *start,
maclobdell 0:f7c60d3e7b8a 325 mbedtls_asn1_named_data *first )
maclobdell 0:f7c60d3e7b8a 326 {
maclobdell 0:f7c60d3e7b8a 327 int ret;
maclobdell 0:f7c60d3e7b8a 328 size_t len = 0;
maclobdell 0:f7c60d3e7b8a 329 mbedtls_asn1_named_data *cur_ext = first;
maclobdell 0:f7c60d3e7b8a 330
maclobdell 0:f7c60d3e7b8a 331 while( cur_ext != NULL )
maclobdell 0:f7c60d3e7b8a 332 {
maclobdell 0:f7c60d3e7b8a 333 MBEDTLS_ASN1_CHK_ADD( len, x509_write_extension( p, start, cur_ext ) );
maclobdell 0:f7c60d3e7b8a 334 cur_ext = cur_ext->next;
maclobdell 0:f7c60d3e7b8a 335 }
maclobdell 0:f7c60d3e7b8a 336
maclobdell 0:f7c60d3e7b8a 337 return( (int) len );
maclobdell 0:f7c60d3e7b8a 338 }
maclobdell 0:f7c60d3e7b8a 339
maclobdell 0:f7c60d3e7b8a 340 #endif /* MBEDTLS_X509_CREATE_C */