Austin Blackstone / Mbed 2 deprecated client-lwip-lightswitch-demo-expanded

mbed client lightswitch demo

Dependencies:   mbed Socket lwip-eth lwip-sys lwip

Fork of mbed-client-classic-example-lwip by Austin Blackstone

mbedtls/source/x509_create.c@11:cada08fc8a70, 2016-06-09 (annotated)

Committer:
mbedAustin
Date:
Thu Jun 09 17:08:36 2016 +0000
Revision:
11:cada08fc8a70
Commit for public Consumption

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbedAustin 11:cada08fc8a70 1 /*
mbedAustin 11:cada08fc8a70 2 * X.509 base functions for creating certificates / CSRs
mbedAustin 11:cada08fc8a70 3 *
mbedAustin 11:cada08fc8a70 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
mbedAustin 11:cada08fc8a70 5 * SPDX-License-Identifier: Apache-2.0
mbedAustin 11:cada08fc8a70 6 *
mbedAustin 11:cada08fc8a70 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
mbedAustin 11:cada08fc8a70 8 * not use this file except in compliance with the License.
mbedAustin 11:cada08fc8a70 9 * You may obtain a copy of the License at
mbedAustin 11:cada08fc8a70 10 *
mbedAustin 11:cada08fc8a70 11 * http://www.apache.org/licenses/LICENSE-2.0
mbedAustin 11:cada08fc8a70 12 *
mbedAustin 11:cada08fc8a70 13 * Unless required by applicable law or agreed to in writing, software
mbedAustin 11:cada08fc8a70 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
mbedAustin 11:cada08fc8a70 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbedAustin 11:cada08fc8a70 16 * See the License for the specific language governing permissions and
mbedAustin 11:cada08fc8a70 17 * limitations under the License.
mbedAustin 11:cada08fc8a70 18 *
mbedAustin 11:cada08fc8a70 19 * This file is part of mbed TLS (https://tls.mbed.org)
mbedAustin 11:cada08fc8a70 20 */
mbedAustin 11:cada08fc8a70 21
mbedAustin 11:cada08fc8a70 22 #if !defined(MBEDTLS_CONFIG_FILE)
mbedAustin 11:cada08fc8a70 23 #include "mbedtls/config.h"
mbedAustin 11:cada08fc8a70 24 #else
mbedAustin 11:cada08fc8a70 25 #include MBEDTLS_CONFIG_FILE
mbedAustin 11:cada08fc8a70 26 #endif
mbedAustin 11:cada08fc8a70 27
mbedAustin 11:cada08fc8a70 28 #if defined(MBEDTLS_X509_CREATE_C)
mbedAustin 11:cada08fc8a70 29
mbedAustin 11:cada08fc8a70 30 #include "mbedtls/x509.h"
mbedAustin 11:cada08fc8a70 31 #include "mbedtls/asn1write.h"
mbedAustin 11:cada08fc8a70 32 #include "mbedtls/oid.h"
mbedAustin 11:cada08fc8a70 33
mbedAustin 11:cada08fc8a70 34 #include <string.h>
mbedAustin 11:cada08fc8a70 35
mbedAustin 11:cada08fc8a70 36 typedef struct {
mbedAustin 11:cada08fc8a70 37 const char *name;
mbedAustin 11:cada08fc8a70 38 size_t name_len;
mbedAustin 11:cada08fc8a70 39 const char*oid;
mbedAustin 11:cada08fc8a70 40 } x509_attr_descriptor_t;
mbedAustin 11:cada08fc8a70 41
mbedAustin 11:cada08fc8a70 42 #define ADD_STRLEN( s ) s, sizeof( s ) - 1
mbedAustin 11:cada08fc8a70 43
mbedAustin 11:cada08fc8a70 44 static const x509_attr_descriptor_t x509_attrs[] =
mbedAustin 11:cada08fc8a70 45 {
mbedAustin 11:cada08fc8a70 46 { ADD_STRLEN( "CN" ), MBEDTLS_OID_AT_CN },
mbedAustin 11:cada08fc8a70 47 { ADD_STRLEN( "commonName" ), MBEDTLS_OID_AT_CN },
mbedAustin 11:cada08fc8a70 48 { ADD_STRLEN( "C" ), MBEDTLS_OID_AT_COUNTRY },
mbedAustin 11:cada08fc8a70 49 { ADD_STRLEN( "countryName" ), MBEDTLS_OID_AT_COUNTRY },
mbedAustin 11:cada08fc8a70 50 { ADD_STRLEN( "O" ), MBEDTLS_OID_AT_ORGANIZATION },
mbedAustin 11:cada08fc8a70 51 { ADD_STRLEN( "organizationName" ), MBEDTLS_OID_AT_ORGANIZATION },
mbedAustin 11:cada08fc8a70 52 { ADD_STRLEN( "L" ), MBEDTLS_OID_AT_LOCALITY },
mbedAustin 11:cada08fc8a70 53 { ADD_STRLEN( "locality" ), MBEDTLS_OID_AT_LOCALITY },
mbedAustin 11:cada08fc8a70 54 { ADD_STRLEN( "R" ), MBEDTLS_OID_PKCS9_EMAIL },
mbedAustin 11:cada08fc8a70 55 { ADD_STRLEN( "OU" ), MBEDTLS_OID_AT_ORG_UNIT },
mbedAustin 11:cada08fc8a70 56 { ADD_STRLEN( "organizationalUnitName" ), MBEDTLS_OID_AT_ORG_UNIT },
mbedAustin 11:cada08fc8a70 57 { ADD_STRLEN( "ST" ), MBEDTLS_OID_AT_STATE },
mbedAustin 11:cada08fc8a70 58 { ADD_STRLEN( "stateOrProvinceName" ), MBEDTLS_OID_AT_STATE },
mbedAustin 11:cada08fc8a70 59 { ADD_STRLEN( "emailAddress" ), MBEDTLS_OID_PKCS9_EMAIL },
mbedAustin 11:cada08fc8a70 60 { ADD_STRLEN( "serialNumber" ), MBEDTLS_OID_AT_SERIAL_NUMBER },
mbedAustin 11:cada08fc8a70 61 { ADD_STRLEN( "postalAddress" ), MBEDTLS_OID_AT_POSTAL_ADDRESS },
mbedAustin 11:cada08fc8a70 62 { ADD_STRLEN( "postalCode" ), MBEDTLS_OID_AT_POSTAL_CODE },
mbedAustin 11:cada08fc8a70 63 { ADD_STRLEN( "dnQualifier" ), MBEDTLS_OID_AT_DN_QUALIFIER },
mbedAustin 11:cada08fc8a70 64 { ADD_STRLEN( "title" ), MBEDTLS_OID_AT_TITLE },
mbedAustin 11:cada08fc8a70 65 { ADD_STRLEN( "surName" ), MBEDTLS_OID_AT_SUR_NAME },
mbedAustin 11:cada08fc8a70 66 { ADD_STRLEN( "SN" ), MBEDTLS_OID_AT_SUR_NAME },
mbedAustin 11:cada08fc8a70 67 { ADD_STRLEN( "givenName" ), MBEDTLS_OID_AT_GIVEN_NAME },
mbedAustin 11:cada08fc8a70 68 { ADD_STRLEN( "GN" ), MBEDTLS_OID_AT_GIVEN_NAME },
mbedAustin 11:cada08fc8a70 69 { ADD_STRLEN( "initials" ), MBEDTLS_OID_AT_INITIALS },
mbedAustin 11:cada08fc8a70 70 { ADD_STRLEN( "pseudonym" ), MBEDTLS_OID_AT_PSEUDONYM },
mbedAustin 11:cada08fc8a70 71 { ADD_STRLEN( "generationQualifier" ), MBEDTLS_OID_AT_GENERATION_QUALIFIER },
mbedAustin 11:cada08fc8a70 72 { ADD_STRLEN( "domainComponent" ), MBEDTLS_OID_DOMAIN_COMPONENT },
mbedAustin 11:cada08fc8a70 73 { ADD_STRLEN( "DC" ), MBEDTLS_OID_DOMAIN_COMPONENT },
mbedAustin 11:cada08fc8a70 74 { NULL, 0, NULL }
mbedAustin 11:cada08fc8a70 75 };
mbedAustin 11:cada08fc8a70 76
mbedAustin 11:cada08fc8a70 77 static const char *x509_at_oid_from_name( const char *name, size_t name_len )
mbedAustin 11:cada08fc8a70 78 {
mbedAustin 11:cada08fc8a70 79 const x509_attr_descriptor_t *cur;
mbedAustin 11:cada08fc8a70 80
mbedAustin 11:cada08fc8a70 81 for( cur = x509_attrs; cur->name != NULL; cur++ )
mbedAustin 11:cada08fc8a70 82 if( cur->name_len == name_len &&
mbedAustin 11:cada08fc8a70 83 strncmp( cur->name, name, name_len ) == 0 )
mbedAustin 11:cada08fc8a70 84 break;
mbedAustin 11:cada08fc8a70 85
mbedAustin 11:cada08fc8a70 86 return( cur->oid );
mbedAustin 11:cada08fc8a70 87 }
mbedAustin 11:cada08fc8a70 88
mbedAustin 11:cada08fc8a70 89 int mbedtls_x509_string_to_names( mbedtls_asn1_named_data **head, const char *name )
mbedAustin 11:cada08fc8a70 90 {
mbedAustin 11:cada08fc8a70 91 int ret = 0;
mbedAustin 11:cada08fc8a70 92 const char *s = name, *c = s;
mbedAustin 11:cada08fc8a70 93 const char *end = s + strlen( s );
mbedAustin 11:cada08fc8a70 94 const char *oid = NULL;
mbedAustin 11:cada08fc8a70 95 int in_tag = 1;
mbedAustin 11:cada08fc8a70 96 char data[MBEDTLS_X509_MAX_DN_NAME_SIZE];
mbedAustin 11:cada08fc8a70 97 char *d = data;
mbedAustin 11:cada08fc8a70 98
mbedAustin 11:cada08fc8a70 99 /* Clear existing chain if present */
mbedAustin 11:cada08fc8a70 100 mbedtls_asn1_free_named_data_list( head );
mbedAustin 11:cada08fc8a70 101
mbedAustin 11:cada08fc8a70 102 while( c <= end )
mbedAustin 11:cada08fc8a70 103 {
mbedAustin 11:cada08fc8a70 104 if( in_tag && *c == '=' )
mbedAustin 11:cada08fc8a70 105 {
mbedAustin 11:cada08fc8a70 106 if( ( oid = x509_at_oid_from_name( s, c - s ) ) == NULL )
mbedAustin 11:cada08fc8a70 107 {
mbedAustin 11:cada08fc8a70 108 ret = MBEDTLS_ERR_X509_UNKNOWN_OID;
mbedAustin 11:cada08fc8a70 109 goto exit;
mbedAustin 11:cada08fc8a70 110 }
mbedAustin 11:cada08fc8a70 111
mbedAustin 11:cada08fc8a70 112 s = c + 1;
mbedAustin 11:cada08fc8a70 113 in_tag = 0;
mbedAustin 11:cada08fc8a70 114 d = data;
mbedAustin 11:cada08fc8a70 115 }
mbedAustin 11:cada08fc8a70 116
mbedAustin 11:cada08fc8a70 117 if( !in_tag && *c == '\\' && c != end )
mbedAustin 11:cada08fc8a70 118 {
mbedAustin 11:cada08fc8a70 119 c++;
mbedAustin 11:cada08fc8a70 120
mbedAustin 11:cada08fc8a70 121 /* Check for valid escaped characters */
mbedAustin 11:cada08fc8a70 122 if( c == end || *c != ',' )
mbedAustin 11:cada08fc8a70 123 {
mbedAustin 11:cada08fc8a70 124 ret = MBEDTLS_ERR_X509_INVALID_NAME;
mbedAustin 11:cada08fc8a70 125 goto exit;
mbedAustin 11:cada08fc8a70 126 }
mbedAustin 11:cada08fc8a70 127 }
mbedAustin 11:cada08fc8a70 128 else if( !in_tag && ( *c == ',' || c == end ) )
mbedAustin 11:cada08fc8a70 129 {
mbedAustin 11:cada08fc8a70 130 if( mbedtls_asn1_store_named_data( head, oid, strlen( oid ),
mbedAustin 11:cada08fc8a70 131 (unsigned char *) data,
mbedAustin 11:cada08fc8a70 132 d - data ) == NULL )
mbedAustin 11:cada08fc8a70 133 {
mbedAustin 11:cada08fc8a70 134 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
mbedAustin 11:cada08fc8a70 135 }
mbedAustin 11:cada08fc8a70 136
mbedAustin 11:cada08fc8a70 137 while( c < end && *(c + 1) == ' ' )
mbedAustin 11:cada08fc8a70 138 c++;
mbedAustin 11:cada08fc8a70 139
mbedAustin 11:cada08fc8a70 140 s = c + 1;
mbedAustin 11:cada08fc8a70 141 in_tag = 1;
mbedAustin 11:cada08fc8a70 142 }
mbedAustin 11:cada08fc8a70 143
mbedAustin 11:cada08fc8a70 144 if( !in_tag && s != c + 1 )
mbedAustin 11:cada08fc8a70 145 {
mbedAustin 11:cada08fc8a70 146 *(d++) = *c;
mbedAustin 11:cada08fc8a70 147
mbedAustin 11:cada08fc8a70 148 if( d - data == MBEDTLS_X509_MAX_DN_NAME_SIZE )
mbedAustin 11:cada08fc8a70 149 {
mbedAustin 11:cada08fc8a70 150 ret = MBEDTLS_ERR_X509_INVALID_NAME;
mbedAustin 11:cada08fc8a70 151 goto exit;
mbedAustin 11:cada08fc8a70 152 }
mbedAustin 11:cada08fc8a70 153 }
mbedAustin 11:cada08fc8a70 154
mbedAustin 11:cada08fc8a70 155 c++;
mbedAustin 11:cada08fc8a70 156 }
mbedAustin 11:cada08fc8a70 157
mbedAustin 11:cada08fc8a70 158 exit:
mbedAustin 11:cada08fc8a70 159
mbedAustin 11:cada08fc8a70 160 return( ret );
mbedAustin 11:cada08fc8a70 161 }
mbedAustin 11:cada08fc8a70 162
mbedAustin 11:cada08fc8a70 163 /* The first byte of the value in the mbedtls_asn1_named_data structure is reserved
mbedAustin 11:cada08fc8a70 164 * to store the critical boolean for us
mbedAustin 11:cada08fc8a70 165 */
mbedAustin 11:cada08fc8a70 166 int mbedtls_x509_set_extension( mbedtls_asn1_named_data **head, const char *oid, size_t oid_len,
mbedAustin 11:cada08fc8a70 167 int critical, const unsigned char *val, size_t val_len )
mbedAustin 11:cada08fc8a70 168 {
mbedAustin 11:cada08fc8a70 169 mbedtls_asn1_named_data *cur;
mbedAustin 11:cada08fc8a70 170
mbedAustin 11:cada08fc8a70 171 if( ( cur = mbedtls_asn1_store_named_data( head, oid, oid_len,
mbedAustin 11:cada08fc8a70 172 NULL, val_len + 1 ) ) == NULL )
mbedAustin 11:cada08fc8a70 173 {
mbedAustin 11:cada08fc8a70 174 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
mbedAustin 11:cada08fc8a70 175 }
mbedAustin 11:cada08fc8a70 176
mbedAustin 11:cada08fc8a70 177 cur->val.p[0] = critical;
mbedAustin 11:cada08fc8a70 178 memcpy( cur->val.p + 1, val, val_len );
mbedAustin 11:cada08fc8a70 179
mbedAustin 11:cada08fc8a70 180 return( 0 );
mbedAustin 11:cada08fc8a70 181 }
mbedAustin 11:cada08fc8a70 182
mbedAustin 11:cada08fc8a70 183 /*
mbedAustin 11:cada08fc8a70 184 * RelativeDistinguishedName ::=
mbedAustin 11:cada08fc8a70 185 * SET OF AttributeTypeAndValue
mbedAustin 11:cada08fc8a70 186 *
mbedAustin 11:cada08fc8a70 187 * AttributeTypeAndValue ::= SEQUENCE {
mbedAustin 11:cada08fc8a70 188 * type AttributeType,
mbedAustin 11:cada08fc8a70 189 * value AttributeValue }
mbedAustin 11:cada08fc8a70 190 *
mbedAustin 11:cada08fc8a70 191 * AttributeType ::= OBJECT IDENTIFIER
mbedAustin 11:cada08fc8a70 192 *
mbedAustin 11:cada08fc8a70 193 * AttributeValue ::= ANY DEFINED BY AttributeType
mbedAustin 11:cada08fc8a70 194 */
mbedAustin 11:cada08fc8a70 195 static int x509_write_name( unsigned char **p, unsigned char *start,
mbedAustin 11:cada08fc8a70 196 const char *oid, size_t oid_len,
mbedAustin 11:cada08fc8a70 197 const unsigned char *name, size_t name_len )
mbedAustin 11:cada08fc8a70 198 {
mbedAustin 11:cada08fc8a70 199 int ret;
mbedAustin 11:cada08fc8a70 200 size_t len = 0;
mbedAustin 11:cada08fc8a70 201
mbedAustin 11:cada08fc8a70 202 // Write PrintableString for all except MBEDTLS_OID_PKCS9_EMAIL
mbedAustin 11:cada08fc8a70 203 //
mbedAustin 11:cada08fc8a70 204 if( MBEDTLS_OID_SIZE( MBEDTLS_OID_PKCS9_EMAIL ) == oid_len &&
mbedAustin 11:cada08fc8a70 205 memcmp( oid, MBEDTLS_OID_PKCS9_EMAIL, oid_len ) == 0 )
mbedAustin 11:cada08fc8a70 206 {
mbedAustin 11:cada08fc8a70 207 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_ia5_string( p, start,
mbedAustin 11:cada08fc8a70 208 (const char *) name,
mbedAustin 11:cada08fc8a70 209 name_len ) );
mbedAustin 11:cada08fc8a70 210 }
mbedAustin 11:cada08fc8a70 211 else
mbedAustin 11:cada08fc8a70 212 {
mbedAustin 11:cada08fc8a70 213 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_printable_string( p, start,
mbedAustin 11:cada08fc8a70 214 (const char *) name,
mbedAustin 11:cada08fc8a70 215 name_len ) );
mbedAustin 11:cada08fc8a70 216 }
mbedAustin 11:cada08fc8a70 217
mbedAustin 11:cada08fc8a70 218 // Write OID
mbedAustin 11:cada08fc8a70 219 //
mbedAustin 11:cada08fc8a70 220 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_oid( p, start, oid, oid_len ) );
mbedAustin 11:cada08fc8a70 221
mbedAustin 11:cada08fc8a70 222 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
mbedAustin 11:cada08fc8a70 223 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
mbedAustin 11:cada08fc8a70 224 MBEDTLS_ASN1_SEQUENCE ) );
mbedAustin 11:cada08fc8a70 225
mbedAustin 11:cada08fc8a70 226 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
mbedAustin 11:cada08fc8a70 227 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
mbedAustin 11:cada08fc8a70 228 MBEDTLS_ASN1_SET ) );
mbedAustin 11:cada08fc8a70 229
mbedAustin 11:cada08fc8a70 230 return( (int) len );
mbedAustin 11:cada08fc8a70 231 }
mbedAustin 11:cada08fc8a70 232
mbedAustin 11:cada08fc8a70 233 int mbedtls_x509_write_names( unsigned char **p, unsigned char *start,
mbedAustin 11:cada08fc8a70 234 mbedtls_asn1_named_data *first )
mbedAustin 11:cada08fc8a70 235 {
mbedAustin 11:cada08fc8a70 236 int ret;
mbedAustin 11:cada08fc8a70 237 size_t len = 0;
mbedAustin 11:cada08fc8a70 238 mbedtls_asn1_named_data *cur = first;
mbedAustin 11:cada08fc8a70 239
mbedAustin 11:cada08fc8a70 240 while( cur != NULL )
mbedAustin 11:cada08fc8a70 241 {
mbedAustin 11:cada08fc8a70 242 MBEDTLS_ASN1_CHK_ADD( len, x509_write_name( p, start, (char *) cur->oid.p,
mbedAustin 11:cada08fc8a70 243 cur->oid.len,
mbedAustin 11:cada08fc8a70 244 cur->val.p, cur->val.len ) );
mbedAustin 11:cada08fc8a70 245 cur = cur->next;
mbedAustin 11:cada08fc8a70 246 }
mbedAustin 11:cada08fc8a70 247
mbedAustin 11:cada08fc8a70 248 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
mbedAustin 11:cada08fc8a70 249 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
mbedAustin 11:cada08fc8a70 250 MBEDTLS_ASN1_SEQUENCE ) );
mbedAustin 11:cada08fc8a70 251
mbedAustin 11:cada08fc8a70 252 return( (int) len );
mbedAustin 11:cada08fc8a70 253 }
mbedAustin 11:cada08fc8a70 254
mbedAustin 11:cada08fc8a70 255 int mbedtls_x509_write_sig( unsigned char **p, unsigned char *start,
mbedAustin 11:cada08fc8a70 256 const char *oid, size_t oid_len,
mbedAustin 11:cada08fc8a70 257 unsigned char *sig, size_t size )
mbedAustin 11:cada08fc8a70 258 {
mbedAustin 11:cada08fc8a70 259 int ret;
mbedAustin 11:cada08fc8a70 260 size_t len = 0;
mbedAustin 11:cada08fc8a70 261
mbedAustin 11:cada08fc8a70 262 if( *p < start || (size_t)( *p - start ) < size )
mbedAustin 11:cada08fc8a70 263 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
mbedAustin 11:cada08fc8a70 264
mbedAustin 11:cada08fc8a70 265 len = size;
mbedAustin 11:cada08fc8a70 266 (*p) -= len;
mbedAustin 11:cada08fc8a70 267 memcpy( *p, sig, len );
mbedAustin 11:cada08fc8a70 268
mbedAustin 11:cada08fc8a70 269 if( *p - start < 1 )
mbedAustin 11:cada08fc8a70 270 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
mbedAustin 11:cada08fc8a70 271
mbedAustin 11:cada08fc8a70 272 *--(*p) = 0;
mbedAustin 11:cada08fc8a70 273 len += 1;
mbedAustin 11:cada08fc8a70 274
mbedAustin 11:cada08fc8a70 275 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
mbedAustin 11:cada08fc8a70 276 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_BIT_STRING ) );
mbedAustin 11:cada08fc8a70 277
mbedAustin 11:cada08fc8a70 278 // Write OID
mbedAustin 11:cada08fc8a70 279 //
mbedAustin 11:cada08fc8a70 280 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_algorithm_identifier( p, start, oid,
mbedAustin 11:cada08fc8a70 281 oid_len, 0 ) );
mbedAustin 11:cada08fc8a70 282
mbedAustin 11:cada08fc8a70 283 return( (int) len );
mbedAustin 11:cada08fc8a70 284 }
mbedAustin 11:cada08fc8a70 285
mbedAustin 11:cada08fc8a70 286 static int x509_write_extension( unsigned char **p, unsigned char *start,
mbedAustin 11:cada08fc8a70 287 mbedtls_asn1_named_data *ext )
mbedAustin 11:cada08fc8a70 288 {
mbedAustin 11:cada08fc8a70 289 int ret;
mbedAustin 11:cada08fc8a70 290 size_t len = 0;
mbedAustin 11:cada08fc8a70 291
mbedAustin 11:cada08fc8a70 292 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start, ext->val.p + 1,
mbedAustin 11:cada08fc8a70 293 ext->val.len - 1 ) );
mbedAustin 11:cada08fc8a70 294 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, ext->val.len - 1 ) );
mbedAustin 11:cada08fc8a70 295 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OCTET_STRING ) );
mbedAustin 11:cada08fc8a70 296
mbedAustin 11:cada08fc8a70 297 if( ext->val.p[0] != 0 )
mbedAustin 11:cada08fc8a70 298 {
mbedAustin 11:cada08fc8a70 299 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_bool( p, start, 1 ) );
mbedAustin 11:cada08fc8a70 300 }
mbedAustin 11:cada08fc8a70 301
mbedAustin 11:cada08fc8a70 302 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start, ext->oid.p,
mbedAustin 11:cada08fc8a70 303 ext->oid.len ) );
mbedAustin 11:cada08fc8a70 304 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, ext->oid.len ) );
mbedAustin 11:cada08fc8a70 305 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OID ) );
mbedAustin 11:cada08fc8a70 306
mbedAustin 11:cada08fc8a70 307 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
mbedAustin 11:cada08fc8a70 308 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
mbedAustin 11:cada08fc8a70 309 MBEDTLS_ASN1_SEQUENCE ) );
mbedAustin 11:cada08fc8a70 310
mbedAustin 11:cada08fc8a70 311 return( (int) len );
mbedAustin 11:cada08fc8a70 312 }
mbedAustin 11:cada08fc8a70 313
mbedAustin 11:cada08fc8a70 314 /*
mbedAustin 11:cada08fc8a70 315 * Extension ::= SEQUENCE {
mbedAustin 11:cada08fc8a70 316 * extnID OBJECT IDENTIFIER,
mbedAustin 11:cada08fc8a70 317 * critical BOOLEAN DEFAULT FALSE,
mbedAustin 11:cada08fc8a70 318 * extnValue OCTET STRING
mbedAustin 11:cada08fc8a70 319 * -- contains the DER encoding of an ASN.1 value
mbedAustin 11:cada08fc8a70 320 * -- corresponding to the extension type identified
mbedAustin 11:cada08fc8a70 321 * -- by extnID
mbedAustin 11:cada08fc8a70 322 * }
mbedAustin 11:cada08fc8a70 323 */
mbedAustin 11:cada08fc8a70 324 int mbedtls_x509_write_extensions( unsigned char **p, unsigned char *start,
mbedAustin 11:cada08fc8a70 325 mbedtls_asn1_named_data *first )
mbedAustin 11:cada08fc8a70 326 {
mbedAustin 11:cada08fc8a70 327 int ret;
mbedAustin 11:cada08fc8a70 328 size_t len = 0;
mbedAustin 11:cada08fc8a70 329 mbedtls_asn1_named_data *cur_ext = first;
mbedAustin 11:cada08fc8a70 330
mbedAustin 11:cada08fc8a70 331 while( cur_ext != NULL )
mbedAustin 11:cada08fc8a70 332 {
mbedAustin 11:cada08fc8a70 333 MBEDTLS_ASN1_CHK_ADD( len, x509_write_extension( p, start, cur_ext ) );
mbedAustin 11:cada08fc8a70 334 cur_ext = cur_ext->next;
mbedAustin 11:cada08fc8a70 335 }
mbedAustin 11:cada08fc8a70 336
mbedAustin 11:cada08fc8a70 337 return( (int) len );
mbedAustin 11:cada08fc8a70 338 }
mbedAustin 11:cada08fc8a70 339
mbedAustin 11:cada08fc8a70 340 #endif /* MBEDTLS_X509_CREATE_C */