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/x509write_crt.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 certificate writing
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 * References:
maclobdell 0:f7c60d3e7b8a 23 * - certificates: RFC 5280, updated by RFC 6818
maclobdell 0:f7c60d3e7b8a 24 * - CSRs: PKCS#10 v1.7 aka RFC 2986
maclobdell 0:f7c60d3e7b8a 25 * - attributes: PKCS#9 v2.0 aka RFC 2985
maclobdell 0:f7c60d3e7b8a 26 */
maclobdell 0:f7c60d3e7b8a 27
maclobdell 0:f7c60d3e7b8a 28 #if !defined(MBEDTLS_CONFIG_FILE)
maclobdell 0:f7c60d3e7b8a 29 #include "mbedtls/config.h"
maclobdell 0:f7c60d3e7b8a 30 #else
maclobdell 0:f7c60d3e7b8a 31 #include MBEDTLS_CONFIG_FILE
maclobdell 0:f7c60d3e7b8a 32 #endif
maclobdell 0:f7c60d3e7b8a 33
maclobdell 0:f7c60d3e7b8a 34 #if defined(MBEDTLS_X509_CRT_WRITE_C)
maclobdell 0:f7c60d3e7b8a 35
maclobdell 0:f7c60d3e7b8a 36 #include "mbedtls/x509_crt.h"
maclobdell 0:f7c60d3e7b8a 37 #include "mbedtls/oid.h"
maclobdell 0:f7c60d3e7b8a 38 #include "mbedtls/asn1write.h"
maclobdell 0:f7c60d3e7b8a 39 #include "mbedtls/sha1.h"
maclobdell 0:f7c60d3e7b8a 40
maclobdell 0:f7c60d3e7b8a 41 #include <string.h>
maclobdell 0:f7c60d3e7b8a 42
maclobdell 0:f7c60d3e7b8a 43 #if defined(MBEDTLS_PEM_WRITE_C)
maclobdell 0:f7c60d3e7b8a 44 #include "mbedtls/pem.h"
maclobdell 0:f7c60d3e7b8a 45 #endif /* MBEDTLS_PEM_WRITE_C */
maclobdell 0:f7c60d3e7b8a 46
maclobdell 0:f7c60d3e7b8a 47 /* Implementation that should never be optimized out by the compiler */
maclobdell 0:f7c60d3e7b8a 48 static void mbedtls_zeroize( void *v, size_t n ) {
maclobdell 0:f7c60d3e7b8a 49 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
maclobdell 0:f7c60d3e7b8a 50 }
maclobdell 0:f7c60d3e7b8a 51
maclobdell 0:f7c60d3e7b8a 52 void mbedtls_x509write_crt_init( mbedtls_x509write_cert *ctx )
maclobdell 0:f7c60d3e7b8a 53 {
maclobdell 0:f7c60d3e7b8a 54 memset( ctx, 0, sizeof(mbedtls_x509write_cert) );
maclobdell 0:f7c60d3e7b8a 55
maclobdell 0:f7c60d3e7b8a 56 mbedtls_mpi_init( &ctx->serial );
maclobdell 0:f7c60d3e7b8a 57 ctx->version = MBEDTLS_X509_CRT_VERSION_3;
maclobdell 0:f7c60d3e7b8a 58 }
maclobdell 0:f7c60d3e7b8a 59
maclobdell 0:f7c60d3e7b8a 60 void mbedtls_x509write_crt_free( mbedtls_x509write_cert *ctx )
maclobdell 0:f7c60d3e7b8a 61 {
maclobdell 0:f7c60d3e7b8a 62 mbedtls_mpi_free( &ctx->serial );
maclobdell 0:f7c60d3e7b8a 63
maclobdell 0:f7c60d3e7b8a 64 mbedtls_asn1_free_named_data_list( &ctx->subject );
maclobdell 0:f7c60d3e7b8a 65 mbedtls_asn1_free_named_data_list( &ctx->issuer );
maclobdell 0:f7c60d3e7b8a 66 mbedtls_asn1_free_named_data_list( &ctx->extensions );
maclobdell 0:f7c60d3e7b8a 67
maclobdell 0:f7c60d3e7b8a 68 mbedtls_zeroize( ctx, sizeof(mbedtls_x509write_cert) );
maclobdell 0:f7c60d3e7b8a 69 }
maclobdell 0:f7c60d3e7b8a 70
maclobdell 0:f7c60d3e7b8a 71 void mbedtls_x509write_crt_set_version( mbedtls_x509write_cert *ctx, int version )
maclobdell 0:f7c60d3e7b8a 72 {
maclobdell 0:f7c60d3e7b8a 73 ctx->version = version;
maclobdell 0:f7c60d3e7b8a 74 }
maclobdell 0:f7c60d3e7b8a 75
maclobdell 0:f7c60d3e7b8a 76 void mbedtls_x509write_crt_set_md_alg( mbedtls_x509write_cert *ctx, mbedtls_md_type_t md_alg )
maclobdell 0:f7c60d3e7b8a 77 {
maclobdell 0:f7c60d3e7b8a 78 ctx->md_alg = md_alg;
maclobdell 0:f7c60d3e7b8a 79 }
maclobdell 0:f7c60d3e7b8a 80
maclobdell 0:f7c60d3e7b8a 81 void mbedtls_x509write_crt_set_subject_key( mbedtls_x509write_cert *ctx, mbedtls_pk_context *key )
maclobdell 0:f7c60d3e7b8a 82 {
maclobdell 0:f7c60d3e7b8a 83 ctx->subject_key = key;
maclobdell 0:f7c60d3e7b8a 84 }
maclobdell 0:f7c60d3e7b8a 85
maclobdell 0:f7c60d3e7b8a 86 void mbedtls_x509write_crt_set_issuer_key( mbedtls_x509write_cert *ctx, mbedtls_pk_context *key )
maclobdell 0:f7c60d3e7b8a 87 {
maclobdell 0:f7c60d3e7b8a 88 ctx->issuer_key = key;
maclobdell 0:f7c60d3e7b8a 89 }
maclobdell 0:f7c60d3e7b8a 90
maclobdell 0:f7c60d3e7b8a 91 int mbedtls_x509write_crt_set_subject_name( mbedtls_x509write_cert *ctx,
maclobdell 0:f7c60d3e7b8a 92 const char *subject_name )
maclobdell 0:f7c60d3e7b8a 93 {
maclobdell 0:f7c60d3e7b8a 94 return mbedtls_x509_string_to_names( &ctx->subject, subject_name );
maclobdell 0:f7c60d3e7b8a 95 }
maclobdell 0:f7c60d3e7b8a 96
maclobdell 0:f7c60d3e7b8a 97 int mbedtls_x509write_crt_set_issuer_name( mbedtls_x509write_cert *ctx,
maclobdell 0:f7c60d3e7b8a 98 const char *issuer_name )
maclobdell 0:f7c60d3e7b8a 99 {
maclobdell 0:f7c60d3e7b8a 100 return mbedtls_x509_string_to_names( &ctx->issuer, issuer_name );
maclobdell 0:f7c60d3e7b8a 101 }
maclobdell 0:f7c60d3e7b8a 102
maclobdell 0:f7c60d3e7b8a 103 int mbedtls_x509write_crt_set_serial( mbedtls_x509write_cert *ctx, const mbedtls_mpi *serial )
maclobdell 0:f7c60d3e7b8a 104 {
maclobdell 0:f7c60d3e7b8a 105 int ret;
maclobdell 0:f7c60d3e7b8a 106
maclobdell 0:f7c60d3e7b8a 107 if( ( ret = mbedtls_mpi_copy( &ctx->serial, serial ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 108 return( ret );
maclobdell 0:f7c60d3e7b8a 109
maclobdell 0:f7c60d3e7b8a 110 return( 0 );
maclobdell 0:f7c60d3e7b8a 111 }
maclobdell 0:f7c60d3e7b8a 112
maclobdell 0:f7c60d3e7b8a 113 int mbedtls_x509write_crt_set_validity( mbedtls_x509write_cert *ctx, const char *not_before,
maclobdell 0:f7c60d3e7b8a 114 const char *not_after )
maclobdell 0:f7c60d3e7b8a 115 {
maclobdell 0:f7c60d3e7b8a 116 if( strlen( not_before ) != MBEDTLS_X509_RFC5280_UTC_TIME_LEN - 1 ||
maclobdell 0:f7c60d3e7b8a 117 strlen( not_after ) != MBEDTLS_X509_RFC5280_UTC_TIME_LEN - 1 )
maclobdell 0:f7c60d3e7b8a 118 {
maclobdell 0:f7c60d3e7b8a 119 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
maclobdell 0:f7c60d3e7b8a 120 }
maclobdell 0:f7c60d3e7b8a 121 strncpy( ctx->not_before, not_before, MBEDTLS_X509_RFC5280_UTC_TIME_LEN );
maclobdell 0:f7c60d3e7b8a 122 strncpy( ctx->not_after , not_after , MBEDTLS_X509_RFC5280_UTC_TIME_LEN );
maclobdell 0:f7c60d3e7b8a 123 ctx->not_before[MBEDTLS_X509_RFC5280_UTC_TIME_LEN - 1] = 'Z';
maclobdell 0:f7c60d3e7b8a 124 ctx->not_after[MBEDTLS_X509_RFC5280_UTC_TIME_LEN - 1] = 'Z';
maclobdell 0:f7c60d3e7b8a 125
maclobdell 0:f7c60d3e7b8a 126 return( 0 );
maclobdell 0:f7c60d3e7b8a 127 }
maclobdell 0:f7c60d3e7b8a 128
maclobdell 0:f7c60d3e7b8a 129 int mbedtls_x509write_crt_set_extension( mbedtls_x509write_cert *ctx,
maclobdell 0:f7c60d3e7b8a 130 const char *oid, size_t oid_len,
maclobdell 0:f7c60d3e7b8a 131 int critical,
maclobdell 0:f7c60d3e7b8a 132 const unsigned char *val, size_t val_len )
maclobdell 0:f7c60d3e7b8a 133 {
maclobdell 0:f7c60d3e7b8a 134 return mbedtls_x509_set_extension( &ctx->extensions, oid, oid_len,
maclobdell 0:f7c60d3e7b8a 135 critical, val, val_len );
maclobdell 0:f7c60d3e7b8a 136 }
maclobdell 0:f7c60d3e7b8a 137
maclobdell 0:f7c60d3e7b8a 138 int mbedtls_x509write_crt_set_basic_constraints( mbedtls_x509write_cert *ctx,
maclobdell 0:f7c60d3e7b8a 139 int is_ca, int max_pathlen )
maclobdell 0:f7c60d3e7b8a 140 {
maclobdell 0:f7c60d3e7b8a 141 int ret;
maclobdell 0:f7c60d3e7b8a 142 unsigned char buf[9];
maclobdell 0:f7c60d3e7b8a 143 unsigned char *c = buf + sizeof(buf);
maclobdell 0:f7c60d3e7b8a 144 size_t len = 0;
maclobdell 0:f7c60d3e7b8a 145
maclobdell 0:f7c60d3e7b8a 146 memset( buf, 0, sizeof(buf) );
maclobdell 0:f7c60d3e7b8a 147
maclobdell 0:f7c60d3e7b8a 148 if( is_ca && max_pathlen > 127 )
maclobdell 0:f7c60d3e7b8a 149 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
maclobdell 0:f7c60d3e7b8a 150
maclobdell 0:f7c60d3e7b8a 151 if( is_ca )
maclobdell 0:f7c60d3e7b8a 152 {
maclobdell 0:f7c60d3e7b8a 153 if( max_pathlen >= 0 )
maclobdell 0:f7c60d3e7b8a 154 {
maclobdell 0:f7c60d3e7b8a 155 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_int( &c, buf, max_pathlen ) );
maclobdell 0:f7c60d3e7b8a 156 }
maclobdell 0:f7c60d3e7b8a 157 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_bool( &c, buf, 1 ) );
maclobdell 0:f7c60d3e7b8a 158 }
maclobdell 0:f7c60d3e7b8a 159
maclobdell 0:f7c60d3e7b8a 160 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
maclobdell 0:f7c60d3e7b8a 161 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_CONSTRUCTED |
maclobdell 0:f7c60d3e7b8a 162 MBEDTLS_ASN1_SEQUENCE ) );
maclobdell 0:f7c60d3e7b8a 163
maclobdell 0:f7c60d3e7b8a 164 return mbedtls_x509write_crt_set_extension( ctx, MBEDTLS_OID_BASIC_CONSTRAINTS,
maclobdell 0:f7c60d3e7b8a 165 MBEDTLS_OID_SIZE( MBEDTLS_OID_BASIC_CONSTRAINTS ),
maclobdell 0:f7c60d3e7b8a 166 0, buf + sizeof(buf) - len, len );
maclobdell 0:f7c60d3e7b8a 167 }
maclobdell 0:f7c60d3e7b8a 168
maclobdell 0:f7c60d3e7b8a 169 #if defined(MBEDTLS_SHA1_C)
maclobdell 0:f7c60d3e7b8a 170 int mbedtls_x509write_crt_set_subject_key_identifier( mbedtls_x509write_cert *ctx )
maclobdell 0:f7c60d3e7b8a 171 {
maclobdell 0:f7c60d3e7b8a 172 int ret;
maclobdell 0:f7c60d3e7b8a 173 unsigned char buf[MBEDTLS_MPI_MAX_SIZE * 2 + 20]; /* tag, length + 2xMPI */
maclobdell 0:f7c60d3e7b8a 174 unsigned char *c = buf + sizeof(buf);
maclobdell 0:f7c60d3e7b8a 175 size_t len = 0;
maclobdell 0:f7c60d3e7b8a 176
maclobdell 0:f7c60d3e7b8a 177 memset( buf, 0, sizeof(buf) );
maclobdell 0:f7c60d3e7b8a 178 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_pk_write_pubkey( &c, buf, ctx->subject_key ) );
maclobdell 0:f7c60d3e7b8a 179
maclobdell 0:f7c60d3e7b8a 180 mbedtls_sha1( buf + sizeof(buf) - len, len, buf + sizeof(buf) - 20 );
maclobdell 0:f7c60d3e7b8a 181 c = buf + sizeof(buf) - 20;
maclobdell 0:f7c60d3e7b8a 182 len = 20;
maclobdell 0:f7c60d3e7b8a 183
maclobdell 0:f7c60d3e7b8a 184 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
maclobdell 0:f7c60d3e7b8a 185 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_OCTET_STRING ) );
maclobdell 0:f7c60d3e7b8a 186
maclobdell 0:f7c60d3e7b8a 187 return mbedtls_x509write_crt_set_extension( ctx, MBEDTLS_OID_SUBJECT_KEY_IDENTIFIER,
maclobdell 0:f7c60d3e7b8a 188 MBEDTLS_OID_SIZE( MBEDTLS_OID_SUBJECT_KEY_IDENTIFIER ),
maclobdell 0:f7c60d3e7b8a 189 0, buf + sizeof(buf) - len, len );
maclobdell 0:f7c60d3e7b8a 190 }
maclobdell 0:f7c60d3e7b8a 191
maclobdell 0:f7c60d3e7b8a 192 int mbedtls_x509write_crt_set_authority_key_identifier( mbedtls_x509write_cert *ctx )
maclobdell 0:f7c60d3e7b8a 193 {
maclobdell 0:f7c60d3e7b8a 194 int ret;
maclobdell 0:f7c60d3e7b8a 195 unsigned char buf[MBEDTLS_MPI_MAX_SIZE * 2 + 20]; /* tag, length + 2xMPI */
maclobdell 0:f7c60d3e7b8a 196 unsigned char *c = buf + sizeof(buf);
maclobdell 0:f7c60d3e7b8a 197 size_t len = 0;
maclobdell 0:f7c60d3e7b8a 198
maclobdell 0:f7c60d3e7b8a 199 memset( buf, 0, sizeof(buf) );
maclobdell 0:f7c60d3e7b8a 200 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_pk_write_pubkey( &c, buf, ctx->issuer_key ) );
maclobdell 0:f7c60d3e7b8a 201
maclobdell 0:f7c60d3e7b8a 202 mbedtls_sha1( buf + sizeof(buf) - len, len, buf + sizeof(buf) - 20 );
maclobdell 0:f7c60d3e7b8a 203 c = buf + sizeof(buf) - 20;
maclobdell 0:f7c60d3e7b8a 204 len = 20;
maclobdell 0:f7c60d3e7b8a 205
maclobdell 0:f7c60d3e7b8a 206 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
maclobdell 0:f7c60d3e7b8a 207 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_CONTEXT_SPECIFIC | 0 ) );
maclobdell 0:f7c60d3e7b8a 208
maclobdell 0:f7c60d3e7b8a 209 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
maclobdell 0:f7c60d3e7b8a 210 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_CONSTRUCTED |
maclobdell 0:f7c60d3e7b8a 211 MBEDTLS_ASN1_SEQUENCE ) );
maclobdell 0:f7c60d3e7b8a 212
maclobdell 0:f7c60d3e7b8a 213 return mbedtls_x509write_crt_set_extension( ctx, MBEDTLS_OID_AUTHORITY_KEY_IDENTIFIER,
maclobdell 0:f7c60d3e7b8a 214 MBEDTLS_OID_SIZE( MBEDTLS_OID_AUTHORITY_KEY_IDENTIFIER ),
maclobdell 0:f7c60d3e7b8a 215 0, buf + sizeof(buf) - len, len );
maclobdell 0:f7c60d3e7b8a 216 }
maclobdell 0:f7c60d3e7b8a 217 #endif /* MBEDTLS_SHA1_C */
maclobdell 0:f7c60d3e7b8a 218
maclobdell 0:f7c60d3e7b8a 219 int mbedtls_x509write_crt_set_key_usage( mbedtls_x509write_cert *ctx,
maclobdell 0:f7c60d3e7b8a 220 unsigned int key_usage )
maclobdell 0:f7c60d3e7b8a 221 {
maclobdell 0:f7c60d3e7b8a 222 unsigned char buf[4], ku;
maclobdell 0:f7c60d3e7b8a 223 unsigned char *c;
maclobdell 0:f7c60d3e7b8a 224 int ret;
maclobdell 0:f7c60d3e7b8a 225
maclobdell 0:f7c60d3e7b8a 226 /* We currently only support 7 bits, from 0x80 to 0x02 */
maclobdell 0:f7c60d3e7b8a 227 if( ( key_usage & ~0xfe ) != 0 )
maclobdell 0:f7c60d3e7b8a 228 return( MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE );
maclobdell 0:f7c60d3e7b8a 229
maclobdell 0:f7c60d3e7b8a 230 c = buf + 4;
maclobdell 0:f7c60d3e7b8a 231 ku = (unsigned char) key_usage;
maclobdell 0:f7c60d3e7b8a 232
maclobdell 0:f7c60d3e7b8a 233 if( ( ret = mbedtls_asn1_write_bitstring( &c, buf, &ku, 7 ) ) != 4 )
maclobdell 0:f7c60d3e7b8a 234 return( ret );
maclobdell 0:f7c60d3e7b8a 235
maclobdell 0:f7c60d3e7b8a 236 ret = mbedtls_x509write_crt_set_extension( ctx, MBEDTLS_OID_KEY_USAGE,
maclobdell 0:f7c60d3e7b8a 237 MBEDTLS_OID_SIZE( MBEDTLS_OID_KEY_USAGE ),
maclobdell 0:f7c60d3e7b8a 238 1, buf, 4 );
maclobdell 0:f7c60d3e7b8a 239 if( ret != 0 )
maclobdell 0:f7c60d3e7b8a 240 return( ret );
maclobdell 0:f7c60d3e7b8a 241
maclobdell 0:f7c60d3e7b8a 242 return( 0 );
maclobdell 0:f7c60d3e7b8a 243 }
maclobdell 0:f7c60d3e7b8a 244
maclobdell 0:f7c60d3e7b8a 245 int mbedtls_x509write_crt_set_ns_cert_type( mbedtls_x509write_cert *ctx,
maclobdell 0:f7c60d3e7b8a 246 unsigned char ns_cert_type )
maclobdell 0:f7c60d3e7b8a 247 {
maclobdell 0:f7c60d3e7b8a 248 unsigned char buf[4];
maclobdell 0:f7c60d3e7b8a 249 unsigned char *c;
maclobdell 0:f7c60d3e7b8a 250 int ret;
maclobdell 0:f7c60d3e7b8a 251
maclobdell 0:f7c60d3e7b8a 252 c = buf + 4;
maclobdell 0:f7c60d3e7b8a 253
maclobdell 0:f7c60d3e7b8a 254 if( ( ret = mbedtls_asn1_write_bitstring( &c, buf, &ns_cert_type, 8 ) ) != 4 )
maclobdell 0:f7c60d3e7b8a 255 return( ret );
maclobdell 0:f7c60d3e7b8a 256
maclobdell 0:f7c60d3e7b8a 257 ret = mbedtls_x509write_crt_set_extension( ctx, MBEDTLS_OID_NS_CERT_TYPE,
maclobdell 0:f7c60d3e7b8a 258 MBEDTLS_OID_SIZE( MBEDTLS_OID_NS_CERT_TYPE ),
maclobdell 0:f7c60d3e7b8a 259 0, buf, 4 );
maclobdell 0:f7c60d3e7b8a 260 if( ret != 0 )
maclobdell 0:f7c60d3e7b8a 261 return( ret );
maclobdell 0:f7c60d3e7b8a 262
maclobdell 0:f7c60d3e7b8a 263 return( 0 );
maclobdell 0:f7c60d3e7b8a 264 }
maclobdell 0:f7c60d3e7b8a 265
maclobdell 0:f7c60d3e7b8a 266 static int x509_write_time( unsigned char **p, unsigned char *start,
maclobdell 0:f7c60d3e7b8a 267 const char *time, size_t size )
maclobdell 0:f7c60d3e7b8a 268 {
maclobdell 0:f7c60d3e7b8a 269 int ret;
maclobdell 0:f7c60d3e7b8a 270 size_t len = 0;
maclobdell 0:f7c60d3e7b8a 271
maclobdell 0:f7c60d3e7b8a 272 /*
maclobdell 0:f7c60d3e7b8a 273 * write MBEDTLS_ASN1_UTC_TIME if year < 2050 (2 bytes shorter)
maclobdell 0:f7c60d3e7b8a 274 */
maclobdell 0:f7c60d3e7b8a 275 if( time[0] == '2' && time[1] == '0' && time [2] < '5' )
maclobdell 0:f7c60d3e7b8a 276 {
maclobdell 0:f7c60d3e7b8a 277 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start,
maclobdell 0:f7c60d3e7b8a 278 (const unsigned char *) time + 2,
maclobdell 0:f7c60d3e7b8a 279 size - 2 ) );
maclobdell 0:f7c60d3e7b8a 280 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
maclobdell 0:f7c60d3e7b8a 281 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_UTC_TIME ) );
maclobdell 0:f7c60d3e7b8a 282 }
maclobdell 0:f7c60d3e7b8a 283 else
maclobdell 0:f7c60d3e7b8a 284 {
maclobdell 0:f7c60d3e7b8a 285 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start,
maclobdell 0:f7c60d3e7b8a 286 (const unsigned char *) time,
maclobdell 0:f7c60d3e7b8a 287 size ) );
maclobdell 0:f7c60d3e7b8a 288 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
maclobdell 0:f7c60d3e7b8a 289 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_GENERALIZED_TIME ) );
maclobdell 0:f7c60d3e7b8a 290 }
maclobdell 0:f7c60d3e7b8a 291
maclobdell 0:f7c60d3e7b8a 292 return( (int) len );
maclobdell 0:f7c60d3e7b8a 293 }
maclobdell 0:f7c60d3e7b8a 294
maclobdell 0:f7c60d3e7b8a 295 int mbedtls_x509write_crt_der( mbedtls_x509write_cert *ctx, unsigned char *buf, size_t size,
maclobdell 0:f7c60d3e7b8a 296 int (*f_rng)(void *, unsigned char *, size_t),
maclobdell 0:f7c60d3e7b8a 297 void *p_rng )
maclobdell 0:f7c60d3e7b8a 298 {
maclobdell 0:f7c60d3e7b8a 299 int ret;
maclobdell 0:f7c60d3e7b8a 300 const char *sig_oid;
maclobdell 0:f7c60d3e7b8a 301 size_t sig_oid_len = 0;
maclobdell 0:f7c60d3e7b8a 302 unsigned char *c, *c2;
maclobdell 0:f7c60d3e7b8a 303 unsigned char hash[64];
maclobdell 0:f7c60d3e7b8a 304 unsigned char sig[MBEDTLS_MPI_MAX_SIZE];
maclobdell 0:f7c60d3e7b8a 305 unsigned char tmp_buf[2048];
maclobdell 0:f7c60d3e7b8a 306 size_t sub_len = 0, pub_len = 0, sig_and_oid_len = 0, sig_len;
maclobdell 0:f7c60d3e7b8a 307 size_t len = 0;
maclobdell 0:f7c60d3e7b8a 308 mbedtls_pk_type_t pk_alg;
maclobdell 0:f7c60d3e7b8a 309
maclobdell 0:f7c60d3e7b8a 310 /*
maclobdell 0:f7c60d3e7b8a 311 * Prepare data to be signed in tmp_buf
maclobdell 0:f7c60d3e7b8a 312 */
maclobdell 0:f7c60d3e7b8a 313 c = tmp_buf + sizeof( tmp_buf );
maclobdell 0:f7c60d3e7b8a 314
maclobdell 0:f7c60d3e7b8a 315 /* Signature algorithm needed in TBS, and later for actual signature */
maclobdell 0:f7c60d3e7b8a 316 pk_alg = mbedtls_pk_get_type( ctx->issuer_key );
maclobdell 0:f7c60d3e7b8a 317 if( pk_alg == MBEDTLS_PK_ECKEY )
maclobdell 0:f7c60d3e7b8a 318 pk_alg = MBEDTLS_PK_ECDSA;
maclobdell 0:f7c60d3e7b8a 319
maclobdell 0:f7c60d3e7b8a 320 if( ( ret = mbedtls_oid_get_oid_by_sig_alg( pk_alg, ctx->md_alg,
maclobdell 0:f7c60d3e7b8a 321 &sig_oid, &sig_oid_len ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 322 {
maclobdell 0:f7c60d3e7b8a 323 return( ret );
maclobdell 0:f7c60d3e7b8a 324 }
maclobdell 0:f7c60d3e7b8a 325
maclobdell 0:f7c60d3e7b8a 326 /*
maclobdell 0:f7c60d3e7b8a 327 * Extensions ::= SEQUENCE SIZE (1..MAX) OF Extension
maclobdell 0:f7c60d3e7b8a 328 */
maclobdell 0:f7c60d3e7b8a 329 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_x509_write_extensions( &c, tmp_buf, ctx->extensions ) );
maclobdell 0:f7c60d3e7b8a 330 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) );
maclobdell 0:f7c60d3e7b8a 331 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED |
maclobdell 0:f7c60d3e7b8a 332 MBEDTLS_ASN1_SEQUENCE ) );
maclobdell 0:f7c60d3e7b8a 333 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) );
maclobdell 0:f7c60d3e7b8a 334 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONTEXT_SPECIFIC |
maclobdell 0:f7c60d3e7b8a 335 MBEDTLS_ASN1_CONSTRUCTED | 3 ) );
maclobdell 0:f7c60d3e7b8a 336
maclobdell 0:f7c60d3e7b8a 337 /*
maclobdell 0:f7c60d3e7b8a 338 * SubjectPublicKeyInfo
maclobdell 0:f7c60d3e7b8a 339 */
maclobdell 0:f7c60d3e7b8a 340 MBEDTLS_ASN1_CHK_ADD( pub_len, mbedtls_pk_write_pubkey_der( ctx->subject_key,
maclobdell 0:f7c60d3e7b8a 341 tmp_buf, c - tmp_buf ) );
maclobdell 0:f7c60d3e7b8a 342 c -= pub_len;
maclobdell 0:f7c60d3e7b8a 343 len += pub_len;
maclobdell 0:f7c60d3e7b8a 344
maclobdell 0:f7c60d3e7b8a 345 /*
maclobdell 0:f7c60d3e7b8a 346 * Subject ::= Name
maclobdell 0:f7c60d3e7b8a 347 */
maclobdell 0:f7c60d3e7b8a 348 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_x509_write_names( &c, tmp_buf, ctx->subject ) );
maclobdell 0:f7c60d3e7b8a 349
maclobdell 0:f7c60d3e7b8a 350 /*
maclobdell 0:f7c60d3e7b8a 351 * Validity ::= SEQUENCE {
maclobdell 0:f7c60d3e7b8a 352 * notBefore Time,
maclobdell 0:f7c60d3e7b8a 353 * notAfter Time }
maclobdell 0:f7c60d3e7b8a 354 */
maclobdell 0:f7c60d3e7b8a 355 sub_len = 0;
maclobdell 0:f7c60d3e7b8a 356
maclobdell 0:f7c60d3e7b8a 357 MBEDTLS_ASN1_CHK_ADD( sub_len, x509_write_time( &c, tmp_buf, ctx->not_after,
maclobdell 0:f7c60d3e7b8a 358 MBEDTLS_X509_RFC5280_UTC_TIME_LEN ) );
maclobdell 0:f7c60d3e7b8a 359
maclobdell 0:f7c60d3e7b8a 360 MBEDTLS_ASN1_CHK_ADD( sub_len, x509_write_time( &c, tmp_buf, ctx->not_before,
maclobdell 0:f7c60d3e7b8a 361 MBEDTLS_X509_RFC5280_UTC_TIME_LEN ) );
maclobdell 0:f7c60d3e7b8a 362
maclobdell 0:f7c60d3e7b8a 363 len += sub_len;
maclobdell 0:f7c60d3e7b8a 364 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, sub_len ) );
maclobdell 0:f7c60d3e7b8a 365 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED |
maclobdell 0:f7c60d3e7b8a 366 MBEDTLS_ASN1_SEQUENCE ) );
maclobdell 0:f7c60d3e7b8a 367
maclobdell 0:f7c60d3e7b8a 368 /*
maclobdell 0:f7c60d3e7b8a 369 * Issuer ::= Name
maclobdell 0:f7c60d3e7b8a 370 */
maclobdell 0:f7c60d3e7b8a 371 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_x509_write_names( &c, tmp_buf, ctx->issuer ) );
maclobdell 0:f7c60d3e7b8a 372
maclobdell 0:f7c60d3e7b8a 373 /*
maclobdell 0:f7c60d3e7b8a 374 * Signature ::= AlgorithmIdentifier
maclobdell 0:f7c60d3e7b8a 375 */
maclobdell 0:f7c60d3e7b8a 376 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_algorithm_identifier( &c, tmp_buf,
maclobdell 0:f7c60d3e7b8a 377 sig_oid, strlen( sig_oid ), 0 ) );
maclobdell 0:f7c60d3e7b8a 378
maclobdell 0:f7c60d3e7b8a 379 /*
maclobdell 0:f7c60d3e7b8a 380 * Serial ::= INTEGER
maclobdell 0:f7c60d3e7b8a 381 */
maclobdell 0:f7c60d3e7b8a 382 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_mpi( &c, tmp_buf, &ctx->serial ) );
maclobdell 0:f7c60d3e7b8a 383
maclobdell 0:f7c60d3e7b8a 384 /*
maclobdell 0:f7c60d3e7b8a 385 * Version ::= INTEGER { v1(0), v2(1), v3(2) }
maclobdell 0:f7c60d3e7b8a 386 */
maclobdell 0:f7c60d3e7b8a 387 sub_len = 0;
maclobdell 0:f7c60d3e7b8a 388 MBEDTLS_ASN1_CHK_ADD( sub_len, mbedtls_asn1_write_int( &c, tmp_buf, ctx->version ) );
maclobdell 0:f7c60d3e7b8a 389 len += sub_len;
maclobdell 0:f7c60d3e7b8a 390 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, sub_len ) );
maclobdell 0:f7c60d3e7b8a 391 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONTEXT_SPECIFIC |
maclobdell 0:f7c60d3e7b8a 392 MBEDTLS_ASN1_CONSTRUCTED | 0 ) );
maclobdell 0:f7c60d3e7b8a 393
maclobdell 0:f7c60d3e7b8a 394 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) );
maclobdell 0:f7c60d3e7b8a 395 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED |
maclobdell 0:f7c60d3e7b8a 396 MBEDTLS_ASN1_SEQUENCE ) );
maclobdell 0:f7c60d3e7b8a 397
maclobdell 0:f7c60d3e7b8a 398 /*
maclobdell 0:f7c60d3e7b8a 399 * Make signature
maclobdell 0:f7c60d3e7b8a 400 */
maclobdell 0:f7c60d3e7b8a 401 mbedtls_md( mbedtls_md_info_from_type( ctx->md_alg ), c, len, hash );
maclobdell 0:f7c60d3e7b8a 402
maclobdell 0:f7c60d3e7b8a 403 if( ( ret = mbedtls_pk_sign( ctx->issuer_key, ctx->md_alg, hash, 0, sig, &sig_len,
maclobdell 0:f7c60d3e7b8a 404 f_rng, p_rng ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 405 {
maclobdell 0:f7c60d3e7b8a 406 return( ret );
maclobdell 0:f7c60d3e7b8a 407 }
maclobdell 0:f7c60d3e7b8a 408
maclobdell 0:f7c60d3e7b8a 409 /*
maclobdell 0:f7c60d3e7b8a 410 * Write data to output buffer
maclobdell 0:f7c60d3e7b8a 411 */
maclobdell 0:f7c60d3e7b8a 412 c2 = buf + size;
maclobdell 0:f7c60d3e7b8a 413 MBEDTLS_ASN1_CHK_ADD( sig_and_oid_len, mbedtls_x509_write_sig( &c2, buf,
maclobdell 0:f7c60d3e7b8a 414 sig_oid, sig_oid_len, sig, sig_len ) );
maclobdell 0:f7c60d3e7b8a 415
maclobdell 0:f7c60d3e7b8a 416 c2 -= len;
maclobdell 0:f7c60d3e7b8a 417 memcpy( c2, c, len );
maclobdell 0:f7c60d3e7b8a 418
maclobdell 0:f7c60d3e7b8a 419 len += sig_and_oid_len;
maclobdell 0:f7c60d3e7b8a 420 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c2, buf, len ) );
maclobdell 0:f7c60d3e7b8a 421 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c2, buf, MBEDTLS_ASN1_CONSTRUCTED |
maclobdell 0:f7c60d3e7b8a 422 MBEDTLS_ASN1_SEQUENCE ) );
maclobdell 0:f7c60d3e7b8a 423
maclobdell 0:f7c60d3e7b8a 424 return( (int) len );
maclobdell 0:f7c60d3e7b8a 425 }
maclobdell 0:f7c60d3e7b8a 426
maclobdell 0:f7c60d3e7b8a 427 #define PEM_BEGIN_CRT "-----BEGIN CERTIFICATE-----\n"
maclobdell 0:f7c60d3e7b8a 428 #define PEM_END_CRT "-----END CERTIFICATE-----\n"
maclobdell 0:f7c60d3e7b8a 429
maclobdell 0:f7c60d3e7b8a 430 #if defined(MBEDTLS_PEM_WRITE_C)
maclobdell 0:f7c60d3e7b8a 431 int mbedtls_x509write_crt_pem( mbedtls_x509write_cert *crt, unsigned char *buf, size_t size,
maclobdell 0:f7c60d3e7b8a 432 int (*f_rng)(void *, unsigned char *, size_t),
maclobdell 0:f7c60d3e7b8a 433 void *p_rng )
maclobdell 0:f7c60d3e7b8a 434 {
maclobdell 0:f7c60d3e7b8a 435 int ret;
maclobdell 0:f7c60d3e7b8a 436 unsigned char output_buf[4096];
maclobdell 0:f7c60d3e7b8a 437 size_t olen = 0;
maclobdell 0:f7c60d3e7b8a 438
maclobdell 0:f7c60d3e7b8a 439 if( ( ret = mbedtls_x509write_crt_der( crt, output_buf, sizeof(output_buf),
maclobdell 0:f7c60d3e7b8a 440 f_rng, p_rng ) ) < 0 )
maclobdell 0:f7c60d3e7b8a 441 {
maclobdell 0:f7c60d3e7b8a 442 return( ret );
maclobdell 0:f7c60d3e7b8a 443 }
maclobdell 0:f7c60d3e7b8a 444
maclobdell 0:f7c60d3e7b8a 445 if( ( ret = mbedtls_pem_write_buffer( PEM_BEGIN_CRT, PEM_END_CRT,
maclobdell 0:f7c60d3e7b8a 446 output_buf + sizeof(output_buf) - ret,
maclobdell 0:f7c60d3e7b8a 447 ret, buf, size, &olen ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 448 {
maclobdell 0:f7c60d3e7b8a 449 return( ret );
maclobdell 0:f7c60d3e7b8a 450 }
maclobdell 0:f7c60d3e7b8a 451
maclobdell 0:f7c60d3e7b8a 452 return( 0 );
maclobdell 0:f7c60d3e7b8a 453 }
maclobdell 0:f7c60d3e7b8a 454 #endif /* MBEDTLS_PEM_WRITE_C */
maclobdell 0:f7c60d3e7b8a 455
maclobdell 0:f7c60d3e7b8a 456 #endif /* MBEDTLS_X509_CRT_WRITE_C */