takashi kadono / Mbed OS Nucleo_446

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Dependencies:   ssd1331

mbed-os/features/mbedtls/src/x509_create.c@0:8fdf9a60065b, 2018-10-10 (annotated)

Committer:
kadonotakashi
Date:
Wed Oct 10 00:33:53 2018 +0000
Revision:
0:8fdf9a60065b
how to make mbed librry

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kadonotakashi 0:8fdf9a60065b 1 /*
kadonotakashi 0:8fdf9a60065b 2 * X.509 base functions for creating certificates / CSRs
kadonotakashi 0:8fdf9a60065b 3 *
kadonotakashi 0:8fdf9a60065b 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
kadonotakashi 0:8fdf9a60065b 5 * SPDX-License-Identifier: Apache-2.0
kadonotakashi 0:8fdf9a60065b 6 *
kadonotakashi 0:8fdf9a60065b 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
kadonotakashi 0:8fdf9a60065b 8 * not use this file except in compliance with the License.
kadonotakashi 0:8fdf9a60065b 9 * You may obtain a copy of the License at
kadonotakashi 0:8fdf9a60065b 10 *
kadonotakashi 0:8fdf9a60065b 11 * http://www.apache.org/licenses/LICENSE-2.0
kadonotakashi 0:8fdf9a60065b 12 *
kadonotakashi 0:8fdf9a60065b 13 * Unless required by applicable law or agreed to in writing, software
kadonotakashi 0:8fdf9a60065b 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
kadonotakashi 0:8fdf9a60065b 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
kadonotakashi 0:8fdf9a60065b 16 * See the License for the specific language governing permissions and
kadonotakashi 0:8fdf9a60065b 17 * limitations under the License.
kadonotakashi 0:8fdf9a60065b 18 *
kadonotakashi 0:8fdf9a60065b 19 * This file is part of mbed TLS (https://tls.mbed.org)
kadonotakashi 0:8fdf9a60065b 20 */
kadonotakashi 0:8fdf9a60065b 21
kadonotakashi 0:8fdf9a60065b 22 #if !defined(MBEDTLS_CONFIG_FILE)
kadonotakashi 0:8fdf9a60065b 23 #include "mbedtls/config.h"
kadonotakashi 0:8fdf9a60065b 24 #else
kadonotakashi 0:8fdf9a60065b 25 #include MBEDTLS_CONFIG_FILE
kadonotakashi 0:8fdf9a60065b 26 #endif
kadonotakashi 0:8fdf9a60065b 27
kadonotakashi 0:8fdf9a60065b 28 #if defined(MBEDTLS_X509_CREATE_C)
kadonotakashi 0:8fdf9a60065b 29
kadonotakashi 0:8fdf9a60065b 30 #include "mbedtls/x509.h"
kadonotakashi 0:8fdf9a60065b 31 #include "mbedtls/asn1write.h"
kadonotakashi 0:8fdf9a60065b 32 #include "mbedtls/oid.h"
kadonotakashi 0:8fdf9a60065b 33
kadonotakashi 0:8fdf9a60065b 34 #include <string.h>
kadonotakashi 0:8fdf9a60065b 35
kadonotakashi 0:8fdf9a60065b 36 typedef struct {
kadonotakashi 0:8fdf9a60065b 37 const char *name;
kadonotakashi 0:8fdf9a60065b 38 size_t name_len;
kadonotakashi 0:8fdf9a60065b 39 const char*oid;
kadonotakashi 0:8fdf9a60065b 40 } x509_attr_descriptor_t;
kadonotakashi 0:8fdf9a60065b 41
kadonotakashi 0:8fdf9a60065b 42 #define ADD_STRLEN( s ) s, sizeof( s ) - 1
kadonotakashi 0:8fdf9a60065b 43
kadonotakashi 0:8fdf9a60065b 44 static const x509_attr_descriptor_t x509_attrs[] =
kadonotakashi 0:8fdf9a60065b 45 {
kadonotakashi 0:8fdf9a60065b 46 { ADD_STRLEN( "CN" ), MBEDTLS_OID_AT_CN },
kadonotakashi 0:8fdf9a60065b 47 { ADD_STRLEN( "commonName" ), MBEDTLS_OID_AT_CN },
kadonotakashi 0:8fdf9a60065b 48 { ADD_STRLEN( "C" ), MBEDTLS_OID_AT_COUNTRY },
kadonotakashi 0:8fdf9a60065b 49 { ADD_STRLEN( "countryName" ), MBEDTLS_OID_AT_COUNTRY },
kadonotakashi 0:8fdf9a60065b 50 { ADD_STRLEN( "O" ), MBEDTLS_OID_AT_ORGANIZATION },
kadonotakashi 0:8fdf9a60065b 51 { ADD_STRLEN( "organizationName" ), MBEDTLS_OID_AT_ORGANIZATION },
kadonotakashi 0:8fdf9a60065b 52 { ADD_STRLEN( "L" ), MBEDTLS_OID_AT_LOCALITY },
kadonotakashi 0:8fdf9a60065b 53 { ADD_STRLEN( "locality" ), MBEDTLS_OID_AT_LOCALITY },
kadonotakashi 0:8fdf9a60065b 54 { ADD_STRLEN( "R" ), MBEDTLS_OID_PKCS9_EMAIL },
kadonotakashi 0:8fdf9a60065b 55 { ADD_STRLEN( "OU" ), MBEDTLS_OID_AT_ORG_UNIT },
kadonotakashi 0:8fdf9a60065b 56 { ADD_STRLEN( "organizationalUnitName" ), MBEDTLS_OID_AT_ORG_UNIT },
kadonotakashi 0:8fdf9a60065b 57 { ADD_STRLEN( "ST" ), MBEDTLS_OID_AT_STATE },
kadonotakashi 0:8fdf9a60065b 58 { ADD_STRLEN( "stateOrProvinceName" ), MBEDTLS_OID_AT_STATE },
kadonotakashi 0:8fdf9a60065b 59 { ADD_STRLEN( "emailAddress" ), MBEDTLS_OID_PKCS9_EMAIL },
kadonotakashi 0:8fdf9a60065b 60 { ADD_STRLEN( "serialNumber" ), MBEDTLS_OID_AT_SERIAL_NUMBER },
kadonotakashi 0:8fdf9a60065b 61 { ADD_STRLEN( "postalAddress" ), MBEDTLS_OID_AT_POSTAL_ADDRESS },
kadonotakashi 0:8fdf9a60065b 62 { ADD_STRLEN( "postalCode" ), MBEDTLS_OID_AT_POSTAL_CODE },
kadonotakashi 0:8fdf9a60065b 63 { ADD_STRLEN( "dnQualifier" ), MBEDTLS_OID_AT_DN_QUALIFIER },
kadonotakashi 0:8fdf9a60065b 64 { ADD_STRLEN( "title" ), MBEDTLS_OID_AT_TITLE },
kadonotakashi 0:8fdf9a60065b 65 { ADD_STRLEN( "surName" ), MBEDTLS_OID_AT_SUR_NAME },
kadonotakashi 0:8fdf9a60065b 66 { ADD_STRLEN( "SN" ), MBEDTLS_OID_AT_SUR_NAME },
kadonotakashi 0:8fdf9a60065b 67 { ADD_STRLEN( "givenName" ), MBEDTLS_OID_AT_GIVEN_NAME },
kadonotakashi 0:8fdf9a60065b 68 { ADD_STRLEN( "GN" ), MBEDTLS_OID_AT_GIVEN_NAME },
kadonotakashi 0:8fdf9a60065b 69 { ADD_STRLEN( "initials" ), MBEDTLS_OID_AT_INITIALS },
kadonotakashi 0:8fdf9a60065b 70 { ADD_STRLEN( "pseudonym" ), MBEDTLS_OID_AT_PSEUDONYM },
kadonotakashi 0:8fdf9a60065b 71 { ADD_STRLEN( "generationQualifier" ), MBEDTLS_OID_AT_GENERATION_QUALIFIER },
kadonotakashi 0:8fdf9a60065b 72 { ADD_STRLEN( "domainComponent" ), MBEDTLS_OID_DOMAIN_COMPONENT },
kadonotakashi 0:8fdf9a60065b 73 { ADD_STRLEN( "DC" ), MBEDTLS_OID_DOMAIN_COMPONENT },
kadonotakashi 0:8fdf9a60065b 74 { NULL, 0, NULL }
kadonotakashi 0:8fdf9a60065b 75 };
kadonotakashi 0:8fdf9a60065b 76
kadonotakashi 0:8fdf9a60065b 77 static const char *x509_at_oid_from_name( const char *name, size_t name_len )
kadonotakashi 0:8fdf9a60065b 78 {
kadonotakashi 0:8fdf9a60065b 79 const x509_attr_descriptor_t *cur;
kadonotakashi 0:8fdf9a60065b 80
kadonotakashi 0:8fdf9a60065b 81 for( cur = x509_attrs; cur->name != NULL; cur++ )
kadonotakashi 0:8fdf9a60065b 82 if( cur->name_len == name_len &&
kadonotakashi 0:8fdf9a60065b 83 strncmp( cur->name, name, name_len ) == 0 )
kadonotakashi 0:8fdf9a60065b 84 break;
kadonotakashi 0:8fdf9a60065b 85
kadonotakashi 0:8fdf9a60065b 86 return( cur->oid );
kadonotakashi 0:8fdf9a60065b 87 }
kadonotakashi 0:8fdf9a60065b 88
kadonotakashi 0:8fdf9a60065b 89 int mbedtls_x509_string_to_names( mbedtls_asn1_named_data **head, const char *name )
kadonotakashi 0:8fdf9a60065b 90 {
kadonotakashi 0:8fdf9a60065b 91 int ret = 0;
kadonotakashi 0:8fdf9a60065b 92 const char *s = name, *c = s;
kadonotakashi 0:8fdf9a60065b 93 const char *end = s + strlen( s );
kadonotakashi 0:8fdf9a60065b 94 const char *oid = NULL;
kadonotakashi 0:8fdf9a60065b 95 int in_tag = 1;
kadonotakashi 0:8fdf9a60065b 96 char data[MBEDTLS_X509_MAX_DN_NAME_SIZE];
kadonotakashi 0:8fdf9a60065b 97 char *d = data;
kadonotakashi 0:8fdf9a60065b 98
kadonotakashi 0:8fdf9a60065b 99 /* Clear existing chain if present */
kadonotakashi 0:8fdf9a60065b 100 mbedtls_asn1_free_named_data_list( head );
kadonotakashi 0:8fdf9a60065b 101
kadonotakashi 0:8fdf9a60065b 102 while( c <= end )
kadonotakashi 0:8fdf9a60065b 103 {
kadonotakashi 0:8fdf9a60065b 104 if( in_tag && *c == '=' )
kadonotakashi 0:8fdf9a60065b 105 {
kadonotakashi 0:8fdf9a60065b 106 if( ( oid = x509_at_oid_from_name( s, c - s ) ) == NULL )
kadonotakashi 0:8fdf9a60065b 107 {
kadonotakashi 0:8fdf9a60065b 108 ret = MBEDTLS_ERR_X509_UNKNOWN_OID;
kadonotakashi 0:8fdf9a60065b 109 goto exit;
kadonotakashi 0:8fdf9a60065b 110 }
kadonotakashi 0:8fdf9a60065b 111
kadonotakashi 0:8fdf9a60065b 112 s = c + 1;
kadonotakashi 0:8fdf9a60065b 113 in_tag = 0;
kadonotakashi 0:8fdf9a60065b 114 d = data;
kadonotakashi 0:8fdf9a60065b 115 }
kadonotakashi 0:8fdf9a60065b 116
kadonotakashi 0:8fdf9a60065b 117 if( !in_tag && *c == '\\' && c != end )
kadonotakashi 0:8fdf9a60065b 118 {
kadonotakashi 0:8fdf9a60065b 119 c++;
kadonotakashi 0:8fdf9a60065b 120
kadonotakashi 0:8fdf9a60065b 121 /* Check for valid escaped characters */
kadonotakashi 0:8fdf9a60065b 122 if( c == end || *c != ',' )
kadonotakashi 0:8fdf9a60065b 123 {
kadonotakashi 0:8fdf9a60065b 124 ret = MBEDTLS_ERR_X509_INVALID_NAME;
kadonotakashi 0:8fdf9a60065b 125 goto exit;
kadonotakashi 0:8fdf9a60065b 126 }
kadonotakashi 0:8fdf9a60065b 127 }
kadonotakashi 0:8fdf9a60065b 128 else if( !in_tag && ( *c == ',' || c == end ) )
kadonotakashi 0:8fdf9a60065b 129 {
kadonotakashi 0:8fdf9a60065b 130 if( mbedtls_asn1_store_named_data( head, oid, strlen( oid ),
kadonotakashi 0:8fdf9a60065b 131 (unsigned char *) data,
kadonotakashi 0:8fdf9a60065b 132 d - data ) == NULL )
kadonotakashi 0:8fdf9a60065b 133 {
kadonotakashi 0:8fdf9a60065b 134 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
kadonotakashi 0:8fdf9a60065b 135 }
kadonotakashi 0:8fdf9a60065b 136
kadonotakashi 0:8fdf9a60065b 137 while( c < end && *(c + 1) == ' ' )
kadonotakashi 0:8fdf9a60065b 138 c++;
kadonotakashi 0:8fdf9a60065b 139
kadonotakashi 0:8fdf9a60065b 140 s = c + 1;
kadonotakashi 0:8fdf9a60065b 141 in_tag = 1;
kadonotakashi 0:8fdf9a60065b 142 }
kadonotakashi 0:8fdf9a60065b 143
kadonotakashi 0:8fdf9a60065b 144 if( !in_tag && s != c + 1 )
kadonotakashi 0:8fdf9a60065b 145 {
kadonotakashi 0:8fdf9a60065b 146 *(d++) = *c;
kadonotakashi 0:8fdf9a60065b 147
kadonotakashi 0:8fdf9a60065b 148 if( d - data == MBEDTLS_X509_MAX_DN_NAME_SIZE )
kadonotakashi 0:8fdf9a60065b 149 {
kadonotakashi 0:8fdf9a60065b 150 ret = MBEDTLS_ERR_X509_INVALID_NAME;
kadonotakashi 0:8fdf9a60065b 151 goto exit;
kadonotakashi 0:8fdf9a60065b 152 }
kadonotakashi 0:8fdf9a60065b 153 }
kadonotakashi 0:8fdf9a60065b 154
kadonotakashi 0:8fdf9a60065b 155 c++;
kadonotakashi 0:8fdf9a60065b 156 }
kadonotakashi 0:8fdf9a60065b 157
kadonotakashi 0:8fdf9a60065b 158 exit:
kadonotakashi 0:8fdf9a60065b 159
kadonotakashi 0:8fdf9a60065b 160 return( ret );
kadonotakashi 0:8fdf9a60065b 161 }
kadonotakashi 0:8fdf9a60065b 162
kadonotakashi 0:8fdf9a60065b 163 /* The first byte of the value in the mbedtls_asn1_named_data structure is reserved
kadonotakashi 0:8fdf9a60065b 164 * to store the critical boolean for us
kadonotakashi 0:8fdf9a60065b 165 */
kadonotakashi 0:8fdf9a60065b 166 int mbedtls_x509_set_extension( mbedtls_asn1_named_data **head, const char *oid, size_t oid_len,
kadonotakashi 0:8fdf9a60065b 167 int critical, const unsigned char *val, size_t val_len )
kadonotakashi 0:8fdf9a60065b 168 {
kadonotakashi 0:8fdf9a60065b 169 mbedtls_asn1_named_data *cur;
kadonotakashi 0:8fdf9a60065b 170
kadonotakashi 0:8fdf9a60065b 171 if( ( cur = mbedtls_asn1_store_named_data( head, oid, oid_len,
kadonotakashi 0:8fdf9a60065b 172 NULL, val_len + 1 ) ) == NULL )
kadonotakashi 0:8fdf9a60065b 173 {
kadonotakashi 0:8fdf9a60065b 174 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
kadonotakashi 0:8fdf9a60065b 175 }
kadonotakashi 0:8fdf9a60065b 176
kadonotakashi 0:8fdf9a60065b 177 cur->val.p[0] = critical;
kadonotakashi 0:8fdf9a60065b 178 memcpy( cur->val.p + 1, val, val_len );
kadonotakashi 0:8fdf9a60065b 179
kadonotakashi 0:8fdf9a60065b 180 return( 0 );
kadonotakashi 0:8fdf9a60065b 181 }
kadonotakashi 0:8fdf9a60065b 182
kadonotakashi 0:8fdf9a60065b 183 /*
kadonotakashi 0:8fdf9a60065b 184 * RelativeDistinguishedName ::=
kadonotakashi 0:8fdf9a60065b 185 * SET OF AttributeTypeAndValue
kadonotakashi 0:8fdf9a60065b 186 *
kadonotakashi 0:8fdf9a60065b 187 * AttributeTypeAndValue ::= SEQUENCE {
kadonotakashi 0:8fdf9a60065b 188 * type AttributeType,
kadonotakashi 0:8fdf9a60065b 189 * value AttributeValue }
kadonotakashi 0:8fdf9a60065b 190 *
kadonotakashi 0:8fdf9a60065b 191 * AttributeType ::= OBJECT IDENTIFIER
kadonotakashi 0:8fdf9a60065b 192 *
kadonotakashi 0:8fdf9a60065b 193 * AttributeValue ::= ANY DEFINED BY AttributeType
kadonotakashi 0:8fdf9a60065b 194 */
kadonotakashi 0:8fdf9a60065b 195 static int x509_write_name( unsigned char **p, unsigned char *start,
kadonotakashi 0:8fdf9a60065b 196 const char *oid, size_t oid_len,
kadonotakashi 0:8fdf9a60065b 197 const unsigned char *name, size_t name_len )
kadonotakashi 0:8fdf9a60065b 198 {
kadonotakashi 0:8fdf9a60065b 199 int ret;
kadonotakashi 0:8fdf9a60065b 200 size_t len = 0;
kadonotakashi 0:8fdf9a60065b 201
kadonotakashi 0:8fdf9a60065b 202 // Write PrintableString for all except MBEDTLS_OID_PKCS9_EMAIL
kadonotakashi 0:8fdf9a60065b 203 //
kadonotakashi 0:8fdf9a60065b 204 if( MBEDTLS_OID_SIZE( MBEDTLS_OID_PKCS9_EMAIL ) == oid_len &&
kadonotakashi 0:8fdf9a60065b 205 memcmp( oid, MBEDTLS_OID_PKCS9_EMAIL, oid_len ) == 0 )
kadonotakashi 0:8fdf9a60065b 206 {
kadonotakashi 0:8fdf9a60065b 207 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_ia5_string( p, start,
kadonotakashi 0:8fdf9a60065b 208 (const char *) name,
kadonotakashi 0:8fdf9a60065b 209 name_len ) );
kadonotakashi 0:8fdf9a60065b 210 }
kadonotakashi 0:8fdf9a60065b 211 else
kadonotakashi 0:8fdf9a60065b 212 {
kadonotakashi 0:8fdf9a60065b 213 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_printable_string( p, start,
kadonotakashi 0:8fdf9a60065b 214 (const char *) name,
kadonotakashi 0:8fdf9a60065b 215 name_len ) );
kadonotakashi 0:8fdf9a60065b 216 }
kadonotakashi 0:8fdf9a60065b 217
kadonotakashi 0:8fdf9a60065b 218 // Write OID
kadonotakashi 0:8fdf9a60065b 219 //
kadonotakashi 0:8fdf9a60065b 220 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_oid( p, start, oid, oid_len ) );
kadonotakashi 0:8fdf9a60065b 221
kadonotakashi 0:8fdf9a60065b 222 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
kadonotakashi 0:8fdf9a60065b 223 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
kadonotakashi 0:8fdf9a60065b 224 MBEDTLS_ASN1_SEQUENCE ) );
kadonotakashi 0:8fdf9a60065b 225
kadonotakashi 0:8fdf9a60065b 226 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
kadonotakashi 0:8fdf9a60065b 227 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
kadonotakashi 0:8fdf9a60065b 228 MBEDTLS_ASN1_SET ) );
kadonotakashi 0:8fdf9a60065b 229
kadonotakashi 0:8fdf9a60065b 230 return( (int) len );
kadonotakashi 0:8fdf9a60065b 231 }
kadonotakashi 0:8fdf9a60065b 232
kadonotakashi 0:8fdf9a60065b 233 int mbedtls_x509_write_names( unsigned char **p, unsigned char *start,
kadonotakashi 0:8fdf9a60065b 234 mbedtls_asn1_named_data *first )
kadonotakashi 0:8fdf9a60065b 235 {
kadonotakashi 0:8fdf9a60065b 236 int ret;
kadonotakashi 0:8fdf9a60065b 237 size_t len = 0;
kadonotakashi 0:8fdf9a60065b 238 mbedtls_asn1_named_data *cur = first;
kadonotakashi 0:8fdf9a60065b 239
kadonotakashi 0:8fdf9a60065b 240 while( cur != NULL )
kadonotakashi 0:8fdf9a60065b 241 {
kadonotakashi 0:8fdf9a60065b 242 MBEDTLS_ASN1_CHK_ADD( len, x509_write_name( p, start, (char *) cur->oid.p,
kadonotakashi 0:8fdf9a60065b 243 cur->oid.len,
kadonotakashi 0:8fdf9a60065b 244 cur->val.p, cur->val.len ) );
kadonotakashi 0:8fdf9a60065b 245 cur = cur->next;
kadonotakashi 0:8fdf9a60065b 246 }
kadonotakashi 0:8fdf9a60065b 247
kadonotakashi 0:8fdf9a60065b 248 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
kadonotakashi 0:8fdf9a60065b 249 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
kadonotakashi 0:8fdf9a60065b 250 MBEDTLS_ASN1_SEQUENCE ) );
kadonotakashi 0:8fdf9a60065b 251
kadonotakashi 0:8fdf9a60065b 252 return( (int) len );
kadonotakashi 0:8fdf9a60065b 253 }
kadonotakashi 0:8fdf9a60065b 254
kadonotakashi 0:8fdf9a60065b 255 int mbedtls_x509_write_sig( unsigned char **p, unsigned char *start,
kadonotakashi 0:8fdf9a60065b 256 const char *oid, size_t oid_len,
kadonotakashi 0:8fdf9a60065b 257 unsigned char *sig, size_t size )
kadonotakashi 0:8fdf9a60065b 258 {
kadonotakashi 0:8fdf9a60065b 259 int ret;
kadonotakashi 0:8fdf9a60065b 260 size_t len = 0;
kadonotakashi 0:8fdf9a60065b 261
kadonotakashi 0:8fdf9a60065b 262 if( *p < start || (size_t)( *p - start ) < size )
kadonotakashi 0:8fdf9a60065b 263 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
kadonotakashi 0:8fdf9a60065b 264
kadonotakashi 0:8fdf9a60065b 265 len = size;
kadonotakashi 0:8fdf9a60065b 266 (*p) -= len;
kadonotakashi 0:8fdf9a60065b 267 memcpy( *p, sig, len );
kadonotakashi 0:8fdf9a60065b 268
kadonotakashi 0:8fdf9a60065b 269 if( *p - start < 1 )
kadonotakashi 0:8fdf9a60065b 270 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
kadonotakashi 0:8fdf9a60065b 271
kadonotakashi 0:8fdf9a60065b 272 *--(*p) = 0;
kadonotakashi 0:8fdf9a60065b 273 len += 1;
kadonotakashi 0:8fdf9a60065b 274
kadonotakashi 0:8fdf9a60065b 275 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
kadonotakashi 0:8fdf9a60065b 276 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_BIT_STRING ) );
kadonotakashi 0:8fdf9a60065b 277
kadonotakashi 0:8fdf9a60065b 278 // Write OID
kadonotakashi 0:8fdf9a60065b 279 //
kadonotakashi 0:8fdf9a60065b 280 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_algorithm_identifier( p, start, oid,
kadonotakashi 0:8fdf9a60065b 281 oid_len, 0 ) );
kadonotakashi 0:8fdf9a60065b 282
kadonotakashi 0:8fdf9a60065b 283 return( (int) len );
kadonotakashi 0:8fdf9a60065b 284 }
kadonotakashi 0:8fdf9a60065b 285
kadonotakashi 0:8fdf9a60065b 286 static int x509_write_extension( unsigned char **p, unsigned char *start,
kadonotakashi 0:8fdf9a60065b 287 mbedtls_asn1_named_data *ext )
kadonotakashi 0:8fdf9a60065b 288 {
kadonotakashi 0:8fdf9a60065b 289 int ret;
kadonotakashi 0:8fdf9a60065b 290 size_t len = 0;
kadonotakashi 0:8fdf9a60065b 291
kadonotakashi 0:8fdf9a60065b 292 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start, ext->val.p + 1,
kadonotakashi 0:8fdf9a60065b 293 ext->val.len - 1 ) );
kadonotakashi 0:8fdf9a60065b 294 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, ext->val.len - 1 ) );
kadonotakashi 0:8fdf9a60065b 295 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OCTET_STRING ) );
kadonotakashi 0:8fdf9a60065b 296
kadonotakashi 0:8fdf9a60065b 297 if( ext->val.p[0] != 0 )
kadonotakashi 0:8fdf9a60065b 298 {
kadonotakashi 0:8fdf9a60065b 299 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_bool( p, start, 1 ) );
kadonotakashi 0:8fdf9a60065b 300 }
kadonotakashi 0:8fdf9a60065b 301
kadonotakashi 0:8fdf9a60065b 302 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start, ext->oid.p,
kadonotakashi 0:8fdf9a60065b 303 ext->oid.len ) );
kadonotakashi 0:8fdf9a60065b 304 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, ext->oid.len ) );
kadonotakashi 0:8fdf9a60065b 305 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OID ) );
kadonotakashi 0:8fdf9a60065b 306
kadonotakashi 0:8fdf9a60065b 307 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
kadonotakashi 0:8fdf9a60065b 308 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED |
kadonotakashi 0:8fdf9a60065b 309 MBEDTLS_ASN1_SEQUENCE ) );
kadonotakashi 0:8fdf9a60065b 310
kadonotakashi 0:8fdf9a60065b 311 return( (int) len );
kadonotakashi 0:8fdf9a60065b 312 }
kadonotakashi 0:8fdf9a60065b 313
kadonotakashi 0:8fdf9a60065b 314 /*
kadonotakashi 0:8fdf9a60065b 315 * Extension ::= SEQUENCE {
kadonotakashi 0:8fdf9a60065b 316 * extnID OBJECT IDENTIFIER,
kadonotakashi 0:8fdf9a60065b 317 * critical BOOLEAN DEFAULT FALSE,
kadonotakashi 0:8fdf9a60065b 318 * extnValue OCTET STRING
kadonotakashi 0:8fdf9a60065b 319 * -- contains the DER encoding of an ASN.1 value
kadonotakashi 0:8fdf9a60065b 320 * -- corresponding to the extension type identified
kadonotakashi 0:8fdf9a60065b 321 * -- by extnID
kadonotakashi 0:8fdf9a60065b 322 * }
kadonotakashi 0:8fdf9a60065b 323 */
kadonotakashi 0:8fdf9a60065b 324 int mbedtls_x509_write_extensions( unsigned char **p, unsigned char *start,
kadonotakashi 0:8fdf9a60065b 325 mbedtls_asn1_named_data *first )
kadonotakashi 0:8fdf9a60065b 326 {
kadonotakashi 0:8fdf9a60065b 327 int ret;
kadonotakashi 0:8fdf9a60065b 328 size_t len = 0;
kadonotakashi 0:8fdf9a60065b 329 mbedtls_asn1_named_data *cur_ext = first;
kadonotakashi 0:8fdf9a60065b 330
kadonotakashi 0:8fdf9a60065b 331 while( cur_ext != NULL )
kadonotakashi 0:8fdf9a60065b 332 {
kadonotakashi 0:8fdf9a60065b 333 MBEDTLS_ASN1_CHK_ADD( len, x509_write_extension( p, start, cur_ext ) );
kadonotakashi 0:8fdf9a60065b 334 cur_ext = cur_ext->next;
kadonotakashi 0:8fdf9a60065b 335 }
kadonotakashi 0:8fdf9a60065b 336
kadonotakashi 0:8fdf9a60065b 337 return( (int) len );
kadonotakashi 0:8fdf9a60065b 338 }
kadonotakashi 0:8fdf9a60065b 339
kadonotakashi 0:8fdf9a60065b 340 #endif /* MBEDTLS_X509_CREATE_C */