Mark Radbourne / mbedtls

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Dependents:   Encrypt_Decrypt1 mbed_blink_tls encrypt encrypt

library/x509_create.c@0:cdf462088d13, 2017-01-05 (annotated)

Committer:
markrad
Date:
Thu Jan 05 00:18:44 2017 +0000
Revision:
0:cdf462088d13
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
markrad 0:cdf462088d13 1 /*
markrad 0:cdf462088d13 2 * X.509 base functions for creating certificates / CSRs
markrad 0:cdf462088d13 3 *
markrad 0:cdf462088d13 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
markrad 0:cdf462088d13 5 * SPDX-License-Identifier: Apache-2.0
markrad 0:cdf462088d13 6 *
markrad 0:cdf462088d13 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
markrad 0:cdf462088d13 8 * not use this file except in compliance with the License.
markrad 0:cdf462088d13 9 * You may obtain a copy of the License at
markrad 0:cdf462088d13 10 *
markrad 0:cdf462088d13 11 * http://www.apache.org/licenses/LICENSE-2.0
markrad 0:cdf462088d13 12 *
markrad 0:cdf462088d13 13 * Unless required by applicable law or agreed to in writing, software
markrad 0:cdf462088d13 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
markrad 0:cdf462088d13 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
markrad 0:cdf462088d13 16 * See the License for the specific language governing permissions and
markrad 0:cdf462088d13 17 * limitations under the License.
markrad 0:cdf462088d13 18 *
markrad 0:cdf462088d13 19 * This file is part of mbed TLS (https://tls.mbed.org)
markrad 0:cdf462088d13 20 */
markrad 0:cdf462088d13 21
markrad 0:cdf462088d13 22 #if !defined(MBEDTLS_CONFIG_FILE)
markrad 0:cdf462088d13 23 #include "mbedtls/config.h"
markrad 0:cdf462088d13 24 #else
markrad 0:cdf462088d13 25 #include MBEDTLS_CONFIG_FILE
markrad 0:cdf462088d13 26 #endif
markrad 0:cdf462088d13 27
markrad 0:cdf462088d13 28 #if defined(MBEDTLS_X509_CREATE_C)
markrad 0:cdf462088d13 29
markrad 0:cdf462088d13 30 #include "mbedtls/x509.h"
markrad 0:cdf462088d13 31 #include "mbedtls/asn1write.h"
markrad 0:cdf462088d13 32 #include "mbedtls/oid.h"
markrad 0:cdf462088d13 33
markrad 0:cdf462088d13 34 #include <string.h>
markrad 0:cdf462088d13 35
markrad 0:cdf462088d13 36 typedef struct {
markrad 0:cdf462088d13 37 const char *name;
markrad 0:cdf462088d13 38 size_t name_len;
markrad 0:cdf462088d13 39 const char*oid;
markrad 0:cdf462088d13 40 } x509_attr_descriptor_t;
markrad 0:cdf462088d13 41
markrad 0:cdf462088d13 42 #define ADD_STRLEN( s ) s, sizeof( s ) - 1
markrad 0:cdf462088d13 43
markrad 0:cdf462088d13 44 static const x509_attr_descriptor_t x509_attrs[] =
markrad 0:cdf462088d13 45 {
markrad 0:cdf462088d13 46 { ADD_STRLEN( "CN" ), MBEDTLS_OID_AT_CN },
markrad 0:cdf462088d13 47 { ADD_STRLEN( "commonName" ), MBEDTLS_OID_AT_CN },
markrad 0:cdf462088d13 48 { ADD_STRLEN( "C" ), MBEDTLS_OID_AT_COUNTRY },
markrad 0:cdf462088d13 49 { ADD_STRLEN( "countryName" ), MBEDTLS_OID_AT_COUNTRY },
markrad 0:cdf462088d13 50 { ADD_STRLEN( "O" ), MBEDTLS_OID_AT_ORGANIZATION },
markrad 0:cdf462088d13 51 { ADD_STRLEN( "organizationName" ), MBEDTLS_OID_AT_ORGANIZATION },
markrad 0:cdf462088d13 52 { ADD_STRLEN( "L" ), MBEDTLS_OID_AT_LOCALITY },
markrad 0:cdf462088d13 53 { ADD_STRLEN( "locality" ), MBEDTLS_OID_AT_LOCALITY },
markrad 0:cdf462088d13 54 { ADD_STRLEN( "R" ), MBEDTLS_OID_PKCS9_EMAIL },
markrad 0:cdf462088d13 55 { ADD_STRLEN( "OU" ), MBEDTLS_OID_AT_ORG_UNIT },
markrad 0:cdf462088d13 56 { ADD_STRLEN( "organizationalUnitName" ), MBEDTLS_OID_AT_ORG_UNIT },
markrad 0:cdf462088d13 57 { ADD_STRLEN( "ST" ), MBEDTLS_OID_AT_STATE },
markrad 0:cdf462088d13 58 { ADD_STRLEN( "stateOrProvinceName" ), MBEDTLS_OID_AT_STATE },
markrad 0:cdf462088d13 59 { ADD_STRLEN( "emailAddress" ), MBEDTLS_OID_PKCS9_EMAIL },
markrad 0:cdf462088d13 60 { ADD_STRLEN( "serialNumber" ), MBEDTLS_OID_AT_SERIAL_NUMBER },
markrad 0:cdf462088d13 61 { ADD_STRLEN( "postalAddress" ), MBEDTLS_OID_AT_POSTAL_ADDRESS },
markrad 0:cdf462088d13 62 { ADD_STRLEN( "postalCode" ), MBEDTLS_OID_AT_POSTAL_CODE },
markrad 0:cdf462088d13 63 { ADD_STRLEN( "dnQualifier" ), MBEDTLS_OID_AT_DN_QUALIFIER },
markrad 0:cdf462088d13 64 { ADD_STRLEN( "title" ), MBEDTLS_OID_AT_TITLE },
markrad 0:cdf462088d13 65 { ADD_STRLEN( "surName" ), MBEDTLS_OID_AT_SUR_NAME },
markrad 0:cdf462088d13 66 { ADD_STRLEN( "SN" ), MBEDTLS_OID_AT_SUR_NAME },
markrad 0:cdf462088d13 67 { ADD_STRLEN( "givenName" ), MBEDTLS_OID_AT_GIVEN_NAME },
markrad 0:cdf462088d13 68 { ADD_STRLEN( "GN" ), MBEDTLS_OID_AT_GIVEN_NAME },
markrad 0:cdf462088d13 69 { ADD_STRLEN( "initials" ), MBEDTLS_OID_AT_INITIALS },
markrad 0:cdf462088d13 70 { ADD_STRLEN( "pseudonym" ), MBEDTLS_OID_AT_PSEUDONYM },
markrad 0:cdf462088d13 71 { ADD_STRLEN( "generationQualifier" ), MBEDTLS_OID_AT_GENERATION_QUALIFIER },
markrad 0:cdf462088d13 72 { ADD_STRLEN( "domainComponent" ), MBEDTLS_OID_DOMAIN_COMPONENT },
markrad 0:cdf462088d13 73 { ADD_STRLEN( "DC" ), MBEDTLS_OID_DOMAIN_COMPONENT },
markrad 0:cdf462088d13 74 { NULL, 0, NULL }
markrad 0:cdf462088d13 75 };
markrad 0:cdf462088d13 76
markrad 0:cdf462088d13 77 static const char *x509_at_oid_from_name( const char *name, size_t name_len )
markrad 0:cdf462088d13 78 {
markrad 0:cdf462088d13 79 const x509_attr_descriptor_t *cur;
markrad 0:cdf462088d13 80
markrad 0:cdf462088d13 81 for( cur = x509_attrs; cur->name != NULL; cur++ )
markrad 0:cdf462088d13 82 if( cur->name_len == name_len &&
markrad 0:cdf462088d13 83 strncmp( cur->name, name, name_len ) == 0 )
markrad 0:cdf462088d13 84 break;
markrad 0:cdf462088d13 85
markrad 0:cdf462088d13 86 return( cur->oid );
markrad 0:cdf462088d13 87 }
markrad 0:cdf462088d13 88
markrad 0:cdf462088d13 89 int mbedtls_x509_string_to_names( mbedtls_asn1_named_data **head, const char *name )
markrad 0:cdf462088d13 90 {
markrad 0:cdf462088d13 91 int ret = 0;
markrad 0:cdf462088d13 92 const char *s = name, *c = s;
markrad 0:cdf462088d13 93 const char *end = s + strlen( s );
markrad 0:cdf462088d13 94 const char *oid = NULL;
markrad 0:cdf462088d13 95 int in_tag = 1;
markrad 0:cdf462088d13 96 char data[MBEDTLS_X509_MAX_DN_NAME_SIZE];
markrad 0:cdf462088d13 97 char *d = data;
markrad 0:cdf462088d13 98
markrad 0:cdf462088d13 99 /* Clear existing chain if present */
markrad 0:cdf462088d13 100 mbedtls_asn1_free_named_data_list( head );
markrad 0:cdf462088d13 101
markrad 0:cdf462088d13 102 while( c <= end )
markrad 0:cdf462088d13 103 {
markrad 0:cdf462088d13 104 if( in_tag && *c == '=' )
markrad 0:cdf462088d13 105 {
markrad 0:cdf462088d13 106 if( ( oid = x509_at_oid_from_name( s, c - s ) ) == NULL )
markrad 0:cdf462088d13 107 {
markrad 0:cdf462088d13 108 ret = MBEDTLS_ERR_X509_UNKNOWN_OID;
markrad 0:cdf462088d13 109 goto exit;
markrad 0:cdf462088d13 110 }
markrad 0:cdf462088d13 111
markrad 0:cdf462088d13 112 s = c + 1;
markrad 0:cdf462088d13 113 in_tag = 0;
markrad 0:cdf462088d13 114 d = data;
markrad 0:cdf462088d13 115 }
markrad 0:cdf462088d13 116
markrad 0:cdf462088d13 117 if( !in_tag && *c == '\\' && c != end )
markrad 0:cdf462088d13 118 {
markrad 0:cdf462088d13 119 c++;
markrad 0:cdf462088d13 120
markrad 0:cdf462088d13 121 /* Check for valid escaped characters */
markrad 0:cdf462088d13 122 if( c == end || *c != ',' )
markrad 0:cdf462088d13 123 {
markrad 0:cdf462088d13 124 ret = MBEDTLS_ERR_X509_INVALID_NAME;
markrad 0:cdf462088d13 125 goto exit;
markrad 0:cdf462088d13 126 }
markrad 0:cdf462088d13 127 }
markrad 0:cdf462088d13 128 else if( !in_tag && ( *c == ',' || c == end ) )
markrad 0:cdf462088d13 129 {
markrad 0:cdf462088d13 130 if( mbedtls_asn1_store_named_data( head, oid, strlen( oid ),
markrad 0:cdf462088d13 131 (unsigned char *) data,
markrad 0:cdf462088d13 132 d - data ) == NULL )
markrad 0:cdf462088d13 133 {
markrad 0:cdf462088d13 134 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
markrad 0:cdf462088d13 135 }
markrad 0:cdf462088d13 136
markrad 0:cdf462088d13 137 while( c < end && *(c + 1) == ' ' )
markrad 0:cdf462088d13 138 c++;
markrad 0:cdf462088d13 139
markrad 0:cdf462088d13 140 s = c + 1;
markrad 0:cdf462088d13 141 in_tag = 1;
markrad 0:cdf462088d13 142 }
markrad 0:cdf462088d13 143
markrad 0:cdf462088d13 144 if( !in_tag && s != c + 1 )
markrad 0:cdf462088d13 145 {
markrad 0:cdf462088d13 146 *(d++) = *c;
markrad 0:cdf462088d13 147
markrad 0:cdf462088d13 148 if( d - data == MBEDTLS_X509_MAX_DN_NAME_SIZE )
markrad 0:cdf462088d13 149 {
markrad 0:cdf462088d13 150 ret = MBEDTLS_ERR_X509_INVALID_NAME;
markrad 0:cdf462088d13 151 goto exit;
markrad 0:cdf462088d13 152 }
markrad 0:cdf462088d13 153 }
markrad 0:cdf462088d13 154
markrad 0:cdf462088d13 155 c++;
markrad 0:cdf462088d13 156 }
markrad 0:cdf462088d13 157
markrad 0:cdf462088d13 158 exit:
markrad 0:cdf462088d13 159
markrad 0:cdf462088d13 160 return( ret );
markrad 0:cdf462088d13 161 }
markrad 0:cdf462088d13 162
markrad 0:cdf462088d13 163 /* The first byte of the value in the mbedtls_asn1_named_data structure is reserved
markrad 0:cdf462088d13 164 * to store the critical boolean for us
markrad 0:cdf462088d13 165 */
markrad 0:cdf462088d13 166 int mbedtls_x509_set_extension( mbedtls_asn1_named_data **head, const char *oid, size_t oid_len,
markrad 0:cdf462088d13 167 int critical, const unsigned char *val, size_t val_len )
markrad 0:cdf462088d13 168 {
markrad 0:cdf462088d13 169 mbedtls_asn1_named_data *cur;
markrad 0:cdf462088d13 170
markrad 0:cdf462088d13 171 if( ( cur = mbedtls_asn1_store_named_data( head, oid, oid_len,
markrad 0:cdf462088d13 172 NULL, val_len + 1 ) ) == NULL )
markrad 0:cdf462088d13 173 {
markrad 0:cdf462088d13 174 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
markrad 0:cdf462088d13 175 }
markrad 0:cdf462088d13 176
markrad 0:cdf462088d13 177 cur->val.p[0] = critical;
markrad 0:cdf462088d13 178 memcpy( cur->val.p + 1, val, val_len );
markrad 0:cdf462088d13 179
markrad 0:cdf462088d13 180 return( 0 );
markrad 0:cdf462088d13 181 }
markrad 0:cdf462088d13 182
markrad 0:cdf462088d13 183 /*
markrad 0:cdf462088d13 184 * RelativeDistinguishedName ::=
markrad 0:cdf462088d13 185 * SET OF AttributeTypeAndValue
markrad 0:cdf462088d13 186 *
markrad 0:cdf462088d13 187 * AttributeTypeAndValue ::= SEQUENCE {
markrad 0:cdf462088d13 188 * type AttributeType,
markrad 0:cdf462088d13 189 * value AttributeValue }
markrad 0:cdf462088d13 190 *
markrad 0:cdf462088d13 191 * AttributeType ::= OBJECT IDENTIFIER
markrad 0:cdf462088d13 192 *
markrad 0:cdf462088d13 193 * AttributeValue ::= ANY DEFINED BY AttributeType
markrad 0:cdf462088d13 194 */
markrad 0:cdf462088d13 195 static int x509_write_name( unsigned char **p, unsigned char *start,
markrad 0:cdf462088d13 196 const char *oid, size_t oid_len,
markrad 0:cdf462088d13 197 const unsigned char *name, size_t name_len )
markrad 0:cdf462088d13 198 {
markrad 0:cdf462088d13 199 int ret;
markrad 0:cdf462088d13 200 size_t len = 0;
markrad 0:cdf462088d13 201
markrad 0:cdf462088d13 202 // Write PrintableString for all except MBEDTLS_OID_PKCS9_EMAIL
markrad 0:cdf462088d13 203 //
markrad 0:cdf462088d13 204 if( MBEDTLS_OID_SIZE( MBEDTLS_OID_PKCS9_EMAIL ) == oid_len &&
markrad 0:cdf462088d13 205 memcmp( oid, MBEDTLS_OID_PKCS9_EMAIL, oid_len ) == 0 )
markrad 0:cdf462088d13 206 {
markrad 0:cdf462088d13 207 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_ia5_string( p, start,
markrad 0:cdf462088d13 208 (const char *) name,
markrad 0:cdf462088d13 209 name_len ) );
markrad 0:cdf462088d13 210 }
markrad 0:cdf462088d13 211 else
markrad 0:cdf462088d13 212 {
markrad 0:cdf462088d13 213 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_printable_string( p, start,
markrad 0:cdf462088d13 214 (const char *) name,
markrad 0:cdf462088d13 215 name_len ) );
markrad 0:cdf462088d13 216 }
markrad 0:cdf462088d13 217
markrad 0:cdf462088d13 218 // Write OID
markrad 0:cdf462088d13 219 //
markrad 0:cdf462088d13 220 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_oid( p, start, oid, oid_len ) );
markrad 0:cdf462088d13 221
markrad 0:cdf462088d13 222 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
markrad 0:cdf462088d13 223 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
markrad 0:cdf462088d13 224 MBEDTLS_ASN1_SEQUENCE ) );
markrad 0:cdf462088d13 225
markrad 0:cdf462088d13 226 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
markrad 0:cdf462088d13 227 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
markrad 0:cdf462088d13 228 MBEDTLS_ASN1_SET ) );
markrad 0:cdf462088d13 229
markrad 0:cdf462088d13 230 return( (int) len );
markrad 0:cdf462088d13 231 }
markrad 0:cdf462088d13 232
markrad 0:cdf462088d13 233 int mbedtls_x509_write_names( unsigned char **p, unsigned char *start,
markrad 0:cdf462088d13 234 mbedtls_asn1_named_data *first )
markrad 0:cdf462088d13 235 {
markrad 0:cdf462088d13 236 int ret;
markrad 0:cdf462088d13 237 size_t len = 0;
markrad 0:cdf462088d13 238 mbedtls_asn1_named_data *cur = first;
markrad 0:cdf462088d13 239
markrad 0:cdf462088d13 240 while( cur != NULL )
markrad 0:cdf462088d13 241 {
markrad 0:cdf462088d13 242 MBEDTLS_ASN1_CHK_ADD( len, x509_write_name( p, start, (char *) cur->oid.p,
markrad 0:cdf462088d13 243 cur->oid.len,
markrad 0:cdf462088d13 244 cur->val.p, cur->val.len ) );
markrad 0:cdf462088d13 245 cur = cur->next;
markrad 0:cdf462088d13 246 }
markrad 0:cdf462088d13 247
markrad 0:cdf462088d13 248 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
markrad 0:cdf462088d13 249 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
markrad 0:cdf462088d13 250 MBEDTLS_ASN1_SEQUENCE ) );
markrad 0:cdf462088d13 251
markrad 0:cdf462088d13 252 return( (int) len );
markrad 0:cdf462088d13 253 }
markrad 0:cdf462088d13 254
markrad 0:cdf462088d13 255 int mbedtls_x509_write_sig( unsigned char **p, unsigned char *start,
markrad 0:cdf462088d13 256 const char *oid, size_t oid_len,
markrad 0:cdf462088d13 257 unsigned char *sig, size_t size )
markrad 0:cdf462088d13 258 {
markrad 0:cdf462088d13 259 int ret;
markrad 0:cdf462088d13 260 size_t len = 0;
markrad 0:cdf462088d13 261
markrad 0:cdf462088d13 262 if( *p < start || (size_t)( *p - start ) < size )
markrad 0:cdf462088d13 263 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
markrad 0:cdf462088d13 264
markrad 0:cdf462088d13 265 len = size;
markrad 0:cdf462088d13 266 (*p) -= len;
markrad 0:cdf462088d13 267 memcpy( *p, sig, len );
markrad 0:cdf462088d13 268
markrad 0:cdf462088d13 269 if( *p - start < 1 )
markrad 0:cdf462088d13 270 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
markrad 0:cdf462088d13 271
markrad 0:cdf462088d13 272 *--(*p) = 0;
markrad 0:cdf462088d13 273 len += 1;
markrad 0:cdf462088d13 274
markrad 0:cdf462088d13 275 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
markrad 0:cdf462088d13 276 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_BIT_STRING ) );
markrad 0:cdf462088d13 277
markrad 0:cdf462088d13 278 // Write OID
markrad 0:cdf462088d13 279 //
markrad 0:cdf462088d13 280 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_algorithm_identifier( p, start, oid,
markrad 0:cdf462088d13 281 oid_len, 0 ) );
markrad 0:cdf462088d13 282
markrad 0:cdf462088d13 283 return( (int) len );
markrad 0:cdf462088d13 284 }
markrad 0:cdf462088d13 285
markrad 0:cdf462088d13 286 static int x509_write_extension( unsigned char **p, unsigned char *start,
markrad 0:cdf462088d13 287 mbedtls_asn1_named_data *ext )
markrad 0:cdf462088d13 288 {
markrad 0:cdf462088d13 289 int ret;
markrad 0:cdf462088d13 290 size_t len = 0;
markrad 0:cdf462088d13 291
markrad 0:cdf462088d13 292 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start, ext->val.p + 1,
markrad 0:cdf462088d13 293 ext->val.len - 1 ) );
markrad 0:cdf462088d13 294 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, ext->val.len - 1 ) );
markrad 0:cdf462088d13 295 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OCTET_STRING ) );
markrad 0:cdf462088d13 296
markrad 0:cdf462088d13 297 if( ext->val.p[0] != 0 )
markrad 0:cdf462088d13 298 {
markrad 0:cdf462088d13 299 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_bool( p, start, 1 ) );
markrad 0:cdf462088d13 300 }
markrad 0:cdf462088d13 301
markrad 0:cdf462088d13 302 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start, ext->oid.p,
markrad 0:cdf462088d13 303 ext->oid.len ) );
markrad 0:cdf462088d13 304 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, ext->oid.len ) );
markrad 0:cdf462088d13 305 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OID ) );
markrad 0:cdf462088d13 306
markrad 0:cdf462088d13 307 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
markrad 0:cdf462088d13 308 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
markrad 0:cdf462088d13 309 MBEDTLS_ASN1_SEQUENCE ) );
markrad 0:cdf462088d13 310
markrad 0:cdf462088d13 311 return( (int) len );
markrad 0:cdf462088d13 312 }
markrad 0:cdf462088d13 313
markrad 0:cdf462088d13 314 /*
markrad 0:cdf462088d13 315 * Extension ::= SEQUENCE {
markrad 0:cdf462088d13 316 * extnID OBJECT IDENTIFIER,
markrad 0:cdf462088d13 317 * critical BOOLEAN DEFAULT FALSE,
markrad 0:cdf462088d13 318 * extnValue OCTET STRING
markrad 0:cdf462088d13 319 * -- contains the DER encoding of an ASN.1 value
markrad 0:cdf462088d13 320 * -- corresponding to the extension type identified
markrad 0:cdf462088d13 321 * -- by extnID
markrad 0:cdf462088d13 322 * }
markrad 0:cdf462088d13 323 */
markrad 0:cdf462088d13 324 int mbedtls_x509_write_extensions( unsigned char **p, unsigned char *start,
markrad 0:cdf462088d13 325 mbedtls_asn1_named_data *first )
markrad 0:cdf462088d13 326 {
markrad 0:cdf462088d13 327 int ret;
markrad 0:cdf462088d13 328 size_t len = 0;
markrad 0:cdf462088d13 329 mbedtls_asn1_named_data *cur_ext = first;
markrad 0:cdf462088d13 330
markrad 0:cdf462088d13 331 while( cur_ext != NULL )
markrad 0:cdf462088d13 332 {
markrad 0:cdf462088d13 333 MBEDTLS_ASN1_CHK_ADD( len, x509_write_extension( p, start, cur_ext ) );
markrad 0:cdf462088d13 334 cur_ext = cur_ext->next;
markrad 0:cdf462088d13 335 }
markrad 0:cdf462088d13 336
markrad 0:cdf462088d13 337 return( (int) len );
markrad 0:cdf462088d13 338 }
markrad 0:cdf462088d13 339
markrad 0:cdf462088d13 340 #endif /* MBEDTLS_X509_CREATE_C */