Marco Zecchini / Mbed OS Example_RTOS

Rtos API example

mbed-os/features/mbedtls/src/x509_create.c@0:9fca2b23d0ba, 2019-02-23 (annotated)

Committer:
marcozecchini
Date:
Sat Feb 23 12:13:36 2019 +0000
Revision:
0:9fca2b23d0ba
final commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
marcozecchini 0:9fca2b23d0ba 1 /*
marcozecchini 0:9fca2b23d0ba 2 * X.509 base functions for creating certificates / CSRs
marcozecchini 0:9fca2b23d0ba 3 *
marcozecchini 0:9fca2b23d0ba 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
marcozecchini 0:9fca2b23d0ba 5 * SPDX-License-Identifier: Apache-2.0
marcozecchini 0:9fca2b23d0ba 6 *
marcozecchini 0:9fca2b23d0ba 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
marcozecchini 0:9fca2b23d0ba 8 * not use this file except in compliance with the License.
marcozecchini 0:9fca2b23d0ba 9 * You may obtain a copy of the License at
marcozecchini 0:9fca2b23d0ba 10 *
marcozecchini 0:9fca2b23d0ba 11 * http://www.apache.org/licenses/LICENSE-2.0
marcozecchini 0:9fca2b23d0ba 12 *
marcozecchini 0:9fca2b23d0ba 13 * Unless required by applicable law or agreed to in writing, software
marcozecchini 0:9fca2b23d0ba 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
marcozecchini 0:9fca2b23d0ba 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
marcozecchini 0:9fca2b23d0ba 16 * See the License for the specific language governing permissions and
marcozecchini 0:9fca2b23d0ba 17 * limitations under the License.
marcozecchini 0:9fca2b23d0ba 18 *
marcozecchini 0:9fca2b23d0ba 19 * This file is part of mbed TLS (https://tls.mbed.org)
marcozecchini 0:9fca2b23d0ba 20 */
marcozecchini 0:9fca2b23d0ba 21
marcozecchini 0:9fca2b23d0ba 22 #if !defined(MBEDTLS_CONFIG_FILE)
marcozecchini 0:9fca2b23d0ba 23 #include "mbedtls/config.h"
marcozecchini 0:9fca2b23d0ba 24 #else
marcozecchini 0:9fca2b23d0ba 25 #include MBEDTLS_CONFIG_FILE
marcozecchini 0:9fca2b23d0ba 26 #endif
marcozecchini 0:9fca2b23d0ba 27
marcozecchini 0:9fca2b23d0ba 28 #if defined(MBEDTLS_X509_CREATE_C)
marcozecchini 0:9fca2b23d0ba 29
marcozecchini 0:9fca2b23d0ba 30 #include "mbedtls/x509.h"
marcozecchini 0:9fca2b23d0ba 31 #include "mbedtls/asn1write.h"
marcozecchini 0:9fca2b23d0ba 32 #include "mbedtls/oid.h"
marcozecchini 0:9fca2b23d0ba 33
marcozecchini 0:9fca2b23d0ba 34 #include <string.h>
marcozecchini 0:9fca2b23d0ba 35
marcozecchini 0:9fca2b23d0ba 36 typedef struct {
marcozecchini 0:9fca2b23d0ba 37 const char *name;
marcozecchini 0:9fca2b23d0ba 38 size_t name_len;
marcozecchini 0:9fca2b23d0ba 39 const char*oid;
marcozecchini 0:9fca2b23d0ba 40 } x509_attr_descriptor_t;
marcozecchini 0:9fca2b23d0ba 41
marcozecchini 0:9fca2b23d0ba 42 #define ADD_STRLEN( s ) s, sizeof( s ) - 1
marcozecchini 0:9fca2b23d0ba 43
marcozecchini 0:9fca2b23d0ba 44 static const x509_attr_descriptor_t x509_attrs[] =
marcozecchini 0:9fca2b23d0ba 45 {
marcozecchini 0:9fca2b23d0ba 46 { ADD_STRLEN( "CN" ), MBEDTLS_OID_AT_CN },
marcozecchini 0:9fca2b23d0ba 47 { ADD_STRLEN( "commonName" ), MBEDTLS_OID_AT_CN },
marcozecchini 0:9fca2b23d0ba 48 { ADD_STRLEN( "C" ), MBEDTLS_OID_AT_COUNTRY },
marcozecchini 0:9fca2b23d0ba 49 { ADD_STRLEN( "countryName" ), MBEDTLS_OID_AT_COUNTRY },
marcozecchini 0:9fca2b23d0ba 50 { ADD_STRLEN( "O" ), MBEDTLS_OID_AT_ORGANIZATION },
marcozecchini 0:9fca2b23d0ba 51 { ADD_STRLEN( "organizationName" ), MBEDTLS_OID_AT_ORGANIZATION },
marcozecchini 0:9fca2b23d0ba 52 { ADD_STRLEN( "L" ), MBEDTLS_OID_AT_LOCALITY },
marcozecchini 0:9fca2b23d0ba 53 { ADD_STRLEN( "locality" ), MBEDTLS_OID_AT_LOCALITY },
marcozecchini 0:9fca2b23d0ba 54 { ADD_STRLEN( "R" ), MBEDTLS_OID_PKCS9_EMAIL },
marcozecchini 0:9fca2b23d0ba 55 { ADD_STRLEN( "OU" ), MBEDTLS_OID_AT_ORG_UNIT },
marcozecchini 0:9fca2b23d0ba 56 { ADD_STRLEN( "organizationalUnitName" ), MBEDTLS_OID_AT_ORG_UNIT },
marcozecchini 0:9fca2b23d0ba 57 { ADD_STRLEN( "ST" ), MBEDTLS_OID_AT_STATE },
marcozecchini 0:9fca2b23d0ba 58 { ADD_STRLEN( "stateOrProvinceName" ), MBEDTLS_OID_AT_STATE },
marcozecchini 0:9fca2b23d0ba 59 { ADD_STRLEN( "emailAddress" ), MBEDTLS_OID_PKCS9_EMAIL },
marcozecchini 0:9fca2b23d0ba 60 { ADD_STRLEN( "serialNumber" ), MBEDTLS_OID_AT_SERIAL_NUMBER },
marcozecchini 0:9fca2b23d0ba 61 { ADD_STRLEN( "postalAddress" ), MBEDTLS_OID_AT_POSTAL_ADDRESS },
marcozecchini 0:9fca2b23d0ba 62 { ADD_STRLEN( "postalCode" ), MBEDTLS_OID_AT_POSTAL_CODE },
marcozecchini 0:9fca2b23d0ba 63 { ADD_STRLEN( "dnQualifier" ), MBEDTLS_OID_AT_DN_QUALIFIER },
marcozecchini 0:9fca2b23d0ba 64 { ADD_STRLEN( "title" ), MBEDTLS_OID_AT_TITLE },
marcozecchini 0:9fca2b23d0ba 65 { ADD_STRLEN( "surName" ), MBEDTLS_OID_AT_SUR_NAME },
marcozecchini 0:9fca2b23d0ba 66 { ADD_STRLEN( "SN" ), MBEDTLS_OID_AT_SUR_NAME },
marcozecchini 0:9fca2b23d0ba 67 { ADD_STRLEN( "givenName" ), MBEDTLS_OID_AT_GIVEN_NAME },
marcozecchini 0:9fca2b23d0ba 68 { ADD_STRLEN( "GN" ), MBEDTLS_OID_AT_GIVEN_NAME },
marcozecchini 0:9fca2b23d0ba 69 { ADD_STRLEN( "initials" ), MBEDTLS_OID_AT_INITIALS },
marcozecchini 0:9fca2b23d0ba 70 { ADD_STRLEN( "pseudonym" ), MBEDTLS_OID_AT_PSEUDONYM },
marcozecchini 0:9fca2b23d0ba 71 { ADD_STRLEN( "generationQualifier" ), MBEDTLS_OID_AT_GENERATION_QUALIFIER },
marcozecchini 0:9fca2b23d0ba 72 { ADD_STRLEN( "domainComponent" ), MBEDTLS_OID_DOMAIN_COMPONENT },
marcozecchini 0:9fca2b23d0ba 73 { ADD_STRLEN( "DC" ), MBEDTLS_OID_DOMAIN_COMPONENT },
marcozecchini 0:9fca2b23d0ba 74 { NULL, 0, NULL }
marcozecchini 0:9fca2b23d0ba 75 };
marcozecchini 0:9fca2b23d0ba 76
marcozecchini 0:9fca2b23d0ba 77 static const char *x509_at_oid_from_name( const char *name, size_t name_len )
marcozecchini 0:9fca2b23d0ba 78 {
marcozecchini 0:9fca2b23d0ba 79 const x509_attr_descriptor_t *cur;
marcozecchini 0:9fca2b23d0ba 80
marcozecchini 0:9fca2b23d0ba 81 for( cur = x509_attrs; cur->name != NULL; cur++ )
marcozecchini 0:9fca2b23d0ba 82 if( cur->name_len == name_len &&
marcozecchini 0:9fca2b23d0ba 83 strncmp( cur->name, name, name_len ) == 0 )
marcozecchini 0:9fca2b23d0ba 84 break;
marcozecchini 0:9fca2b23d0ba 85
marcozecchini 0:9fca2b23d0ba 86 return( cur->oid );
marcozecchini 0:9fca2b23d0ba 87 }
marcozecchini 0:9fca2b23d0ba 88
marcozecchini 0:9fca2b23d0ba 89 int mbedtls_x509_string_to_names( mbedtls_asn1_named_data **head, const char *name )
marcozecchini 0:9fca2b23d0ba 90 {
marcozecchini 0:9fca2b23d0ba 91 int ret = 0;
marcozecchini 0:9fca2b23d0ba 92 const char *s = name, *c = s;
marcozecchini 0:9fca2b23d0ba 93 const char *end = s + strlen( s );
marcozecchini 0:9fca2b23d0ba 94 const char *oid = NULL;
marcozecchini 0:9fca2b23d0ba 95 int in_tag = 1;
marcozecchini 0:9fca2b23d0ba 96 char data[MBEDTLS_X509_MAX_DN_NAME_SIZE];
marcozecchini 0:9fca2b23d0ba 97 char *d = data;
marcozecchini 0:9fca2b23d0ba 98
marcozecchini 0:9fca2b23d0ba 99 /* Clear existing chain if present */
marcozecchini 0:9fca2b23d0ba 100 mbedtls_asn1_free_named_data_list( head );
marcozecchini 0:9fca2b23d0ba 101
marcozecchini 0:9fca2b23d0ba 102 while( c <= end )
marcozecchini 0:9fca2b23d0ba 103 {
marcozecchini 0:9fca2b23d0ba 104 if( in_tag && *c == '=' )
marcozecchini 0:9fca2b23d0ba 105 {
marcozecchini 0:9fca2b23d0ba 106 if( ( oid = x509_at_oid_from_name( s, c - s ) ) == NULL )
marcozecchini 0:9fca2b23d0ba 107 {
marcozecchini 0:9fca2b23d0ba 108 ret = MBEDTLS_ERR_X509_UNKNOWN_OID;
marcozecchini 0:9fca2b23d0ba 109 goto exit;
marcozecchini 0:9fca2b23d0ba 110 }
marcozecchini 0:9fca2b23d0ba 111
marcozecchini 0:9fca2b23d0ba 112 s = c + 1;
marcozecchini 0:9fca2b23d0ba 113 in_tag = 0;
marcozecchini 0:9fca2b23d0ba 114 d = data;
marcozecchini 0:9fca2b23d0ba 115 }
marcozecchini 0:9fca2b23d0ba 116
marcozecchini 0:9fca2b23d0ba 117 if( !in_tag && *c == '\\' && c != end )
marcozecchini 0:9fca2b23d0ba 118 {
marcozecchini 0:9fca2b23d0ba 119 c++;
marcozecchini 0:9fca2b23d0ba 120
marcozecchini 0:9fca2b23d0ba 121 /* Check for valid escaped characters */
marcozecchini 0:9fca2b23d0ba 122 if( c == end || *c != ',' )
marcozecchini 0:9fca2b23d0ba 123 {
marcozecchini 0:9fca2b23d0ba 124 ret = MBEDTLS_ERR_X509_INVALID_NAME;
marcozecchini 0:9fca2b23d0ba 125 goto exit;
marcozecchini 0:9fca2b23d0ba 126 }
marcozecchini 0:9fca2b23d0ba 127 }
marcozecchini 0:9fca2b23d0ba 128 else if( !in_tag && ( *c == ',' || c == end ) )
marcozecchini 0:9fca2b23d0ba 129 {
marcozecchini 0:9fca2b23d0ba 130 if( mbedtls_asn1_store_named_data( head, oid, strlen( oid ),
marcozecchini 0:9fca2b23d0ba 131 (unsigned char *) data,
marcozecchini 0:9fca2b23d0ba 132 d - data ) == NULL )
marcozecchini 0:9fca2b23d0ba 133 {
marcozecchini 0:9fca2b23d0ba 134 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
marcozecchini 0:9fca2b23d0ba 135 }
marcozecchini 0:9fca2b23d0ba 136
marcozecchini 0:9fca2b23d0ba 137 while( c < end && *(c + 1) == ' ' )
marcozecchini 0:9fca2b23d0ba 138 c++;
marcozecchini 0:9fca2b23d0ba 139
marcozecchini 0:9fca2b23d0ba 140 s = c + 1;
marcozecchini 0:9fca2b23d0ba 141 in_tag = 1;
marcozecchini 0:9fca2b23d0ba 142 }
marcozecchini 0:9fca2b23d0ba 143
marcozecchini 0:9fca2b23d0ba 144 if( !in_tag && s != c + 1 )
marcozecchini 0:9fca2b23d0ba 145 {
marcozecchini 0:9fca2b23d0ba 146 *(d++) = *c;
marcozecchini 0:9fca2b23d0ba 147
marcozecchini 0:9fca2b23d0ba 148 if( d - data == MBEDTLS_X509_MAX_DN_NAME_SIZE )
marcozecchini 0:9fca2b23d0ba 149 {
marcozecchini 0:9fca2b23d0ba 150 ret = MBEDTLS_ERR_X509_INVALID_NAME;
marcozecchini 0:9fca2b23d0ba 151 goto exit;
marcozecchini 0:9fca2b23d0ba 152 }
marcozecchini 0:9fca2b23d0ba 153 }
marcozecchini 0:9fca2b23d0ba 154
marcozecchini 0:9fca2b23d0ba 155 c++;
marcozecchini 0:9fca2b23d0ba 156 }
marcozecchini 0:9fca2b23d0ba 157
marcozecchini 0:9fca2b23d0ba 158 exit:
marcozecchini 0:9fca2b23d0ba 159
marcozecchini 0:9fca2b23d0ba 160 return( ret );
marcozecchini 0:9fca2b23d0ba 161 }
marcozecchini 0:9fca2b23d0ba 162
marcozecchini 0:9fca2b23d0ba 163 /* The first byte of the value in the mbedtls_asn1_named_data structure is reserved
marcozecchini 0:9fca2b23d0ba 164 * to store the critical boolean for us
marcozecchini 0:9fca2b23d0ba 165 */
marcozecchini 0:9fca2b23d0ba 166 int mbedtls_x509_set_extension( mbedtls_asn1_named_data **head, const char *oid, size_t oid_len,
marcozecchini 0:9fca2b23d0ba 167 int critical, const unsigned char *val, size_t val_len )
marcozecchini 0:9fca2b23d0ba 168 {
marcozecchini 0:9fca2b23d0ba 169 mbedtls_asn1_named_data *cur;
marcozecchini 0:9fca2b23d0ba 170
marcozecchini 0:9fca2b23d0ba 171 if( ( cur = mbedtls_asn1_store_named_data( head, oid, oid_len,
marcozecchini 0:9fca2b23d0ba 172 NULL, val_len + 1 ) ) == NULL )
marcozecchini 0:9fca2b23d0ba 173 {
marcozecchini 0:9fca2b23d0ba 174 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
marcozecchini 0:9fca2b23d0ba 175 }
marcozecchini 0:9fca2b23d0ba 176
marcozecchini 0:9fca2b23d0ba 177 cur->val.p[0] = critical;
marcozecchini 0:9fca2b23d0ba 178 memcpy( cur->val.p + 1, val, val_len );
marcozecchini 0:9fca2b23d0ba 179
marcozecchini 0:9fca2b23d0ba 180 return( 0 );
marcozecchini 0:9fca2b23d0ba 181 }
marcozecchini 0:9fca2b23d0ba 182
marcozecchini 0:9fca2b23d0ba 183 /*
marcozecchini 0:9fca2b23d0ba 184 * RelativeDistinguishedName ::=
marcozecchini 0:9fca2b23d0ba 185 * SET OF AttributeTypeAndValue
marcozecchini 0:9fca2b23d0ba 186 *
marcozecchini 0:9fca2b23d0ba 187 * AttributeTypeAndValue ::= SEQUENCE {
marcozecchini 0:9fca2b23d0ba 188 * type AttributeType,
marcozecchini 0:9fca2b23d0ba 189 * value AttributeValue }
marcozecchini 0:9fca2b23d0ba 190 *
marcozecchini 0:9fca2b23d0ba 191 * AttributeType ::= OBJECT IDENTIFIER
marcozecchini 0:9fca2b23d0ba 192 *
marcozecchini 0:9fca2b23d0ba 193 * AttributeValue ::= ANY DEFINED BY AttributeType
marcozecchini 0:9fca2b23d0ba 194 */
marcozecchini 0:9fca2b23d0ba 195 static int x509_write_name( unsigned char **p, unsigned char *start,
marcozecchini 0:9fca2b23d0ba 196 const char *oid, size_t oid_len,
marcozecchini 0:9fca2b23d0ba 197 const unsigned char *name, size_t name_len )
marcozecchini 0:9fca2b23d0ba 198 {
marcozecchini 0:9fca2b23d0ba 199 int ret;
marcozecchini 0:9fca2b23d0ba 200 size_t len = 0;
marcozecchini 0:9fca2b23d0ba 201
marcozecchini 0:9fca2b23d0ba 202 // Write PrintableString for all except MBEDTLS_OID_PKCS9_EMAIL
marcozecchini 0:9fca2b23d0ba 203 //
marcozecchini 0:9fca2b23d0ba 204 if( MBEDTLS_OID_SIZE( MBEDTLS_OID_PKCS9_EMAIL ) == oid_len &&
marcozecchini 0:9fca2b23d0ba 205 memcmp( oid, MBEDTLS_OID_PKCS9_EMAIL, oid_len ) == 0 )
marcozecchini 0:9fca2b23d0ba 206 {
marcozecchini 0:9fca2b23d0ba 207 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_ia5_string( p, start,
marcozecchini 0:9fca2b23d0ba 208 (const char *) name,
marcozecchini 0:9fca2b23d0ba 209 name_len ) );
marcozecchini 0:9fca2b23d0ba 210 }
marcozecchini 0:9fca2b23d0ba 211 else
marcozecchini 0:9fca2b23d0ba 212 {
marcozecchini 0:9fca2b23d0ba 213 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_printable_string( p, start,
marcozecchini 0:9fca2b23d0ba 214 (const char *) name,
marcozecchini 0:9fca2b23d0ba 215 name_len ) );
marcozecchini 0:9fca2b23d0ba 216 }
marcozecchini 0:9fca2b23d0ba 217
marcozecchini 0:9fca2b23d0ba 218 // Write OID
marcozecchini 0:9fca2b23d0ba 219 //
marcozecchini 0:9fca2b23d0ba 220 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_oid( p, start, oid, oid_len ) );
marcozecchini 0:9fca2b23d0ba 221
marcozecchini 0:9fca2b23d0ba 222 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
marcozecchini 0:9fca2b23d0ba 223 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
marcozecchini 0:9fca2b23d0ba 224 MBEDTLS_ASN1_SEQUENCE ) );
marcozecchini 0:9fca2b23d0ba 225
marcozecchini 0:9fca2b23d0ba 226 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
marcozecchini 0:9fca2b23d0ba 227 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
marcozecchini 0:9fca2b23d0ba 228 MBEDTLS_ASN1_SET ) );
marcozecchini 0:9fca2b23d0ba 229
marcozecchini 0:9fca2b23d0ba 230 return( (int) len );
marcozecchini 0:9fca2b23d0ba 231 }
marcozecchini 0:9fca2b23d0ba 232
marcozecchini 0:9fca2b23d0ba 233 int mbedtls_x509_write_names( unsigned char **p, unsigned char *start,
marcozecchini 0:9fca2b23d0ba 234 mbedtls_asn1_named_data *first )
marcozecchini 0:9fca2b23d0ba 235 {
marcozecchini 0:9fca2b23d0ba 236 int ret;
marcozecchini 0:9fca2b23d0ba 237 size_t len = 0;
marcozecchini 0:9fca2b23d0ba 238 mbedtls_asn1_named_data *cur = first;
marcozecchini 0:9fca2b23d0ba 239
marcozecchini 0:9fca2b23d0ba 240 while( cur != NULL )
marcozecchini 0:9fca2b23d0ba 241 {
marcozecchini 0:9fca2b23d0ba 242 MBEDTLS_ASN1_CHK_ADD( len, x509_write_name( p, start, (char *) cur->oid.p,
marcozecchini 0:9fca2b23d0ba 243 cur->oid.len,
marcozecchini 0:9fca2b23d0ba 244 cur->val.p, cur->val.len ) );
marcozecchini 0:9fca2b23d0ba 245 cur = cur->next;
marcozecchini 0:9fca2b23d0ba 246 }
marcozecchini 0:9fca2b23d0ba 247
marcozecchini 0:9fca2b23d0ba 248 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
marcozecchini 0:9fca2b23d0ba 249 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
marcozecchini 0:9fca2b23d0ba 250 MBEDTLS_ASN1_SEQUENCE ) );
marcozecchini 0:9fca2b23d0ba 251
marcozecchini 0:9fca2b23d0ba 252 return( (int) len );
marcozecchini 0:9fca2b23d0ba 253 }
marcozecchini 0:9fca2b23d0ba 254
marcozecchini 0:9fca2b23d0ba 255 int mbedtls_x509_write_sig( unsigned char **p, unsigned char *start,
marcozecchini 0:9fca2b23d0ba 256 const char *oid, size_t oid_len,
marcozecchini 0:9fca2b23d0ba 257 unsigned char *sig, size_t size )
marcozecchini 0:9fca2b23d0ba 258 {
marcozecchini 0:9fca2b23d0ba 259 int ret;
marcozecchini 0:9fca2b23d0ba 260 size_t len = 0;
marcozecchini 0:9fca2b23d0ba 261
marcozecchini 0:9fca2b23d0ba 262 if( *p < start || (size_t)( *p - start ) < size )
marcozecchini 0:9fca2b23d0ba 263 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
marcozecchini 0:9fca2b23d0ba 264
marcozecchini 0:9fca2b23d0ba 265 len = size;
marcozecchini 0:9fca2b23d0ba 266 (*p) -= len;
marcozecchini 0:9fca2b23d0ba 267 memcpy( *p, sig, len );
marcozecchini 0:9fca2b23d0ba 268
marcozecchini 0:9fca2b23d0ba 269 if( *p - start < 1 )
marcozecchini 0:9fca2b23d0ba 270 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
marcozecchini 0:9fca2b23d0ba 271
marcozecchini 0:9fca2b23d0ba 272 *--(*p) = 0;
marcozecchini 0:9fca2b23d0ba 273 len += 1;
marcozecchini 0:9fca2b23d0ba 274
marcozecchini 0:9fca2b23d0ba 275 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
marcozecchini 0:9fca2b23d0ba 276 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_BIT_STRING ) );
marcozecchini 0:9fca2b23d0ba 277
marcozecchini 0:9fca2b23d0ba 278 // Write OID
marcozecchini 0:9fca2b23d0ba 279 //
marcozecchini 0:9fca2b23d0ba 280 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_algorithm_identifier( p, start, oid,
marcozecchini 0:9fca2b23d0ba 281 oid_len, 0 ) );
marcozecchini 0:9fca2b23d0ba 282
marcozecchini 0:9fca2b23d0ba 283 return( (int) len );
marcozecchini 0:9fca2b23d0ba 284 }
marcozecchini 0:9fca2b23d0ba 285
marcozecchini 0:9fca2b23d0ba 286 static int x509_write_extension( unsigned char **p, unsigned char *start,
marcozecchini 0:9fca2b23d0ba 287 mbedtls_asn1_named_data *ext )
marcozecchini 0:9fca2b23d0ba 288 {
marcozecchini 0:9fca2b23d0ba 289 int ret;
marcozecchini 0:9fca2b23d0ba 290 size_t len = 0;
marcozecchini 0:9fca2b23d0ba 291
marcozecchini 0:9fca2b23d0ba 292 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start, ext->val.p + 1,
marcozecchini 0:9fca2b23d0ba 293 ext->val.len - 1 ) );
marcozecchini 0:9fca2b23d0ba 294 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, ext->val.len - 1 ) );
marcozecchini 0:9fca2b23d0ba 295 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OCTET_STRING ) );
marcozecchini 0:9fca2b23d0ba 296
marcozecchini 0:9fca2b23d0ba 297 if( ext->val.p[0] != 0 )
marcozecchini 0:9fca2b23d0ba 298 {
marcozecchini 0:9fca2b23d0ba 299 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_bool( p, start, 1 ) );
marcozecchini 0:9fca2b23d0ba 300 }
marcozecchini 0:9fca2b23d0ba 301
marcozecchini 0:9fca2b23d0ba 302 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start, ext->oid.p,
marcozecchini 0:9fca2b23d0ba 303 ext->oid.len ) );
marcozecchini 0:9fca2b23d0ba 304 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, ext->oid.len ) );
marcozecchini 0:9fca2b23d0ba 305 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OID ) );
marcozecchini 0:9fca2b23d0ba 306
marcozecchini 0:9fca2b23d0ba 307 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
marcozecchini 0:9fca2b23d0ba 308 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
marcozecchini 0:9fca2b23d0ba 309 MBEDTLS_ASN1_SEQUENCE ) );
marcozecchini 0:9fca2b23d0ba 310
marcozecchini 0:9fca2b23d0ba 311 return( (int) len );
marcozecchini 0:9fca2b23d0ba 312 }
marcozecchini 0:9fca2b23d0ba 313
marcozecchini 0:9fca2b23d0ba 314 /*
marcozecchini 0:9fca2b23d0ba 315 * Extension ::= SEQUENCE {
marcozecchini 0:9fca2b23d0ba 316 * extnID OBJECT IDENTIFIER,
marcozecchini 0:9fca2b23d0ba 317 * critical BOOLEAN DEFAULT FALSE,
marcozecchini 0:9fca2b23d0ba 318 * extnValue OCTET STRING
marcozecchini 0:9fca2b23d0ba 319 * -- contains the DER encoding of an ASN.1 value
marcozecchini 0:9fca2b23d0ba 320 * -- corresponding to the extension type identified
marcozecchini 0:9fca2b23d0ba 321 * -- by extnID
marcozecchini 0:9fca2b23d0ba 322 * }
marcozecchini 0:9fca2b23d0ba 323 */
marcozecchini 0:9fca2b23d0ba 324 int mbedtls_x509_write_extensions( unsigned char **p, unsigned char *start,
marcozecchini 0:9fca2b23d0ba 325 mbedtls_asn1_named_data *first )
marcozecchini 0:9fca2b23d0ba 326 {
marcozecchini 0:9fca2b23d0ba 327 int ret;
marcozecchini 0:9fca2b23d0ba 328 size_t len = 0;
marcozecchini 0:9fca2b23d0ba 329 mbedtls_asn1_named_data *cur_ext = first;
marcozecchini 0:9fca2b23d0ba 330
marcozecchini 0:9fca2b23d0ba 331 while( cur_ext != NULL )
marcozecchini 0:9fca2b23d0ba 332 {
marcozecchini 0:9fca2b23d0ba 333 MBEDTLS_ASN1_CHK_ADD( len, x509_write_extension( p, start, cur_ext ) );
marcozecchini 0:9fca2b23d0ba 334 cur_ext = cur_ext->next;
marcozecchini 0:9fca2b23d0ba 335 }
marcozecchini 0:9fca2b23d0ba 336
marcozecchini 0:9fca2b23d0ba 337 return( (int) len );
marcozecchini 0:9fca2b23d0ba 338 }
marcozecchini 0:9fca2b23d0ba 339
marcozecchini 0:9fca2b23d0ba 340 #endif /* MBEDTLS_X509_CREATE_C */