Nathen Gallardojohnson / WNCInterface

I added functionality to get the RSSI, BER, and Cell Neighbor for reporting connection issues to M2X

Dependencies:   WncControllerK64F

mbedtls/source/x509write_crt.c@12:0071cb144c7a, 2016-11-01 (annotated)

Committer:
JMF
Date:
Tue Nov 01 14:22:56 2016 +0000
Revision:
12:0071cb144c7a
Adding mbedtls files

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JMF 12:0071cb144c7a 1 /*
JMF 12:0071cb144c7a 2 * X.509 certificate writing
JMF 12:0071cb144c7a 3 *
JMF 12:0071cb144c7a 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
JMF 12:0071cb144c7a 5 * SPDX-License-Identifier: Apache-2.0
JMF 12:0071cb144c7a 6 *
JMF 12:0071cb144c7a 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
JMF 12:0071cb144c7a 8 * not use this file except in compliance with the License.
JMF 12:0071cb144c7a 9 * You may obtain a copy of the License at
JMF 12:0071cb144c7a 10 *
JMF 12:0071cb144c7a 11 * http://www.apache.org/licenses/LICENSE-2.0
JMF 12:0071cb144c7a 12 *
JMF 12:0071cb144c7a 13 * Unless required by applicable law or agreed to in writing, software
JMF 12:0071cb144c7a 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
JMF 12:0071cb144c7a 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
JMF 12:0071cb144c7a 16 * See the License for the specific language governing permissions and
JMF 12:0071cb144c7a 17 * limitations under the License.
JMF 12:0071cb144c7a 18 *
JMF 12:0071cb144c7a 19 * This file is part of mbed TLS (https://tls.mbed.org)
JMF 12:0071cb144c7a 20 */
JMF 12:0071cb144c7a 21 /*
JMF 12:0071cb144c7a 22 * References:
JMF 12:0071cb144c7a 23 * - certificates: RFC 5280, updated by RFC 6818
JMF 12:0071cb144c7a 24 * - CSRs: PKCS#10 v1.7 aka RFC 2986
JMF 12:0071cb144c7a 25 * - attributes: PKCS#9 v2.0 aka RFC 2985
JMF 12:0071cb144c7a 26 */
JMF 12:0071cb144c7a 27
JMF 12:0071cb144c7a 28 #if !defined(MBEDTLS_CONFIG_FILE)
JMF 12:0071cb144c7a 29 #include "mbedtls/config.h"
JMF 12:0071cb144c7a 30 #else
JMF 12:0071cb144c7a 31 #include MBEDTLS_CONFIG_FILE
JMF 12:0071cb144c7a 32 #endif
JMF 12:0071cb144c7a 33
JMF 12:0071cb144c7a 34 #if defined(MBEDTLS_X509_CRT_WRITE_C)
JMF 12:0071cb144c7a 35
JMF 12:0071cb144c7a 36 #include "mbedtls/x509_crt.h"
JMF 12:0071cb144c7a 37 #include "mbedtls/oid.h"
JMF 12:0071cb144c7a 38 #include "mbedtls/asn1write.h"
JMF 12:0071cb144c7a 39 #include "mbedtls/sha1.h"
JMF 12:0071cb144c7a 40
JMF 12:0071cb144c7a 41 #include <string.h>
JMF 12:0071cb144c7a 42
JMF 12:0071cb144c7a 43 #if defined(MBEDTLS_PEM_WRITE_C)
JMF 12:0071cb144c7a 44 #include "mbedtls/pem.h"
JMF 12:0071cb144c7a 45 #endif /* MBEDTLS_PEM_WRITE_C */
JMF 12:0071cb144c7a 46
JMF 12:0071cb144c7a 47 /* Implementation that should never be optimized out by the compiler */
JMF 12:0071cb144c7a 48 static void mbedtls_zeroize( void *v, size_t n ) {
JMF 12:0071cb144c7a 49 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
JMF 12:0071cb144c7a 50 }
JMF 12:0071cb144c7a 51
JMF 12:0071cb144c7a 52 void mbedtls_x509write_crt_init( mbedtls_x509write_cert *ctx )
JMF 12:0071cb144c7a 53 {
JMF 12:0071cb144c7a 54 memset( ctx, 0, sizeof(mbedtls_x509write_cert) );
JMF 12:0071cb144c7a 55
JMF 12:0071cb144c7a 56 mbedtls_mpi_init( &ctx->serial );
JMF 12:0071cb144c7a 57 ctx->version = MBEDTLS_X509_CRT_VERSION_3;
JMF 12:0071cb144c7a 58 }
JMF 12:0071cb144c7a 59
JMF 12:0071cb144c7a 60 void mbedtls_x509write_crt_free( mbedtls_x509write_cert *ctx )
JMF 12:0071cb144c7a 61 {
JMF 12:0071cb144c7a 62 mbedtls_mpi_free( &ctx->serial );
JMF 12:0071cb144c7a 63
JMF 12:0071cb144c7a 64 mbedtls_asn1_free_named_data_list( &ctx->subject );
JMF 12:0071cb144c7a 65 mbedtls_asn1_free_named_data_list( &ctx->issuer );
JMF 12:0071cb144c7a 66 mbedtls_asn1_free_named_data_list( &ctx->extensions );
JMF 12:0071cb144c7a 67
JMF 12:0071cb144c7a 68 mbedtls_zeroize( ctx, sizeof(mbedtls_x509write_cert) );
JMF 12:0071cb144c7a 69 }
JMF 12:0071cb144c7a 70
JMF 12:0071cb144c7a 71 void mbedtls_x509write_crt_set_version( mbedtls_x509write_cert *ctx, int version )
JMF 12:0071cb144c7a 72 {
JMF 12:0071cb144c7a 73 ctx->version = version;
JMF 12:0071cb144c7a 74 }
JMF 12:0071cb144c7a 75
JMF 12:0071cb144c7a 76 void mbedtls_x509write_crt_set_md_alg( mbedtls_x509write_cert *ctx, mbedtls_md_type_t md_alg )
JMF 12:0071cb144c7a 77 {
JMF 12:0071cb144c7a 78 ctx->md_alg = md_alg;
JMF 12:0071cb144c7a 79 }
JMF 12:0071cb144c7a 80
JMF 12:0071cb144c7a 81 void mbedtls_x509write_crt_set_subject_key( mbedtls_x509write_cert *ctx, mbedtls_pk_context *key )
JMF 12:0071cb144c7a 82 {
JMF 12:0071cb144c7a 83 ctx->subject_key = key;
JMF 12:0071cb144c7a 84 }
JMF 12:0071cb144c7a 85
JMF 12:0071cb144c7a 86 void mbedtls_x509write_crt_set_issuer_key( mbedtls_x509write_cert *ctx, mbedtls_pk_context *key )
JMF 12:0071cb144c7a 87 {
JMF 12:0071cb144c7a 88 ctx->issuer_key = key;
JMF 12:0071cb144c7a 89 }
JMF 12:0071cb144c7a 90
JMF 12:0071cb144c7a 91 int mbedtls_x509write_crt_set_subject_name( mbedtls_x509write_cert *ctx,
JMF 12:0071cb144c7a 92 const char *subject_name )
JMF 12:0071cb144c7a 93 {
JMF 12:0071cb144c7a 94 return mbedtls_x509_string_to_names( &ctx->subject, subject_name );
JMF 12:0071cb144c7a 95 }
JMF 12:0071cb144c7a 96
JMF 12:0071cb144c7a 97 int mbedtls_x509write_crt_set_issuer_name( mbedtls_x509write_cert *ctx,
JMF 12:0071cb144c7a 98 const char *issuer_name )
JMF 12:0071cb144c7a 99 {
JMF 12:0071cb144c7a 100 return mbedtls_x509_string_to_names( &ctx->issuer, issuer_name );
JMF 12:0071cb144c7a 101 }
JMF 12:0071cb144c7a 102
JMF 12:0071cb144c7a 103 int mbedtls_x509write_crt_set_serial( mbedtls_x509write_cert *ctx, const mbedtls_mpi *serial )
JMF 12:0071cb144c7a 104 {
JMF 12:0071cb144c7a 105 int ret;
JMF 12:0071cb144c7a 106
JMF 12:0071cb144c7a 107 if( ( ret = mbedtls_mpi_copy( &ctx->serial, serial ) ) != 0 )
JMF 12:0071cb144c7a 108 return( ret );
JMF 12:0071cb144c7a 109
JMF 12:0071cb144c7a 110 return( 0 );
JMF 12:0071cb144c7a 111 }
JMF 12:0071cb144c7a 112
JMF 12:0071cb144c7a 113 int mbedtls_x509write_crt_set_validity( mbedtls_x509write_cert *ctx, const char *not_before,
JMF 12:0071cb144c7a 114 const char *not_after )
JMF 12:0071cb144c7a 115 {
JMF 12:0071cb144c7a 116 if( strlen( not_before ) != MBEDTLS_X509_RFC5280_UTC_TIME_LEN - 1 ||
JMF 12:0071cb144c7a 117 strlen( not_after ) != MBEDTLS_X509_RFC5280_UTC_TIME_LEN - 1 )
JMF 12:0071cb144c7a 118 {
JMF 12:0071cb144c7a 119 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
JMF 12:0071cb144c7a 120 }
JMF 12:0071cb144c7a 121 strncpy( ctx->not_before, not_before, MBEDTLS_X509_RFC5280_UTC_TIME_LEN );
JMF 12:0071cb144c7a 122 strncpy( ctx->not_after , not_after , MBEDTLS_X509_RFC5280_UTC_TIME_LEN );
JMF 12:0071cb144c7a 123 ctx->not_before[MBEDTLS_X509_RFC5280_UTC_TIME_LEN - 1] = 'Z';
JMF 12:0071cb144c7a 124 ctx->not_after[MBEDTLS_X509_RFC5280_UTC_TIME_LEN - 1] = 'Z';
JMF 12:0071cb144c7a 125
JMF 12:0071cb144c7a 126 return( 0 );
JMF 12:0071cb144c7a 127 }
JMF 12:0071cb144c7a 128
JMF 12:0071cb144c7a 129 int mbedtls_x509write_crt_set_extension( mbedtls_x509write_cert *ctx,
JMF 12:0071cb144c7a 130 const char *oid, size_t oid_len,
JMF 12:0071cb144c7a 131 int critical,
JMF 12:0071cb144c7a 132 const unsigned char *val, size_t val_len )
JMF 12:0071cb144c7a 133 {
JMF 12:0071cb144c7a 134 return mbedtls_x509_set_extension( &ctx->extensions, oid, oid_len,
JMF 12:0071cb144c7a 135 critical, val, val_len );
JMF 12:0071cb144c7a 136 }
JMF 12:0071cb144c7a 137
JMF 12:0071cb144c7a 138 int mbedtls_x509write_crt_set_basic_constraints( mbedtls_x509write_cert *ctx,
JMF 12:0071cb144c7a 139 int is_ca, int max_pathlen )
JMF 12:0071cb144c7a 140 {
JMF 12:0071cb144c7a 141 int ret;
JMF 12:0071cb144c7a 142 unsigned char buf[9];
JMF 12:0071cb144c7a 143 unsigned char *c = buf + sizeof(buf);
JMF 12:0071cb144c7a 144 size_t len = 0;
JMF 12:0071cb144c7a 145
JMF 12:0071cb144c7a 146 memset( buf, 0, sizeof(buf) );
JMF 12:0071cb144c7a 147
JMF 12:0071cb144c7a 148 if( is_ca && max_pathlen > 127 )
JMF 12:0071cb144c7a 149 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
JMF 12:0071cb144c7a 150
JMF 12:0071cb144c7a 151 if( is_ca )
JMF 12:0071cb144c7a 152 {
JMF 12:0071cb144c7a 153 if( max_pathlen >= 0 )
JMF 12:0071cb144c7a 154 {
JMF 12:0071cb144c7a 155 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_int( &c, buf, max_pathlen ) );
JMF 12:0071cb144c7a 156 }
JMF 12:0071cb144c7a 157 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_bool( &c, buf, 1 ) );
JMF 12:0071cb144c7a 158 }
JMF 12:0071cb144c7a 159
JMF 12:0071cb144c7a 160 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
JMF 12:0071cb144c7a 161 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_CONSTRUCTED |
JMF 12:0071cb144c7a 162 MBEDTLS_ASN1_SEQUENCE ) );
JMF 12:0071cb144c7a 163
JMF 12:0071cb144c7a 164 return mbedtls_x509write_crt_set_extension( ctx, MBEDTLS_OID_BASIC_CONSTRAINTS,
JMF 12:0071cb144c7a 165 MBEDTLS_OID_SIZE( MBEDTLS_OID_BASIC_CONSTRAINTS ),
JMF 12:0071cb144c7a 166 0, buf + sizeof(buf) - len, len );
JMF 12:0071cb144c7a 167 }
JMF 12:0071cb144c7a 168
JMF 12:0071cb144c7a 169 #if defined(MBEDTLS_SHA1_C)
JMF 12:0071cb144c7a 170 int mbedtls_x509write_crt_set_subject_key_identifier( mbedtls_x509write_cert *ctx )
JMF 12:0071cb144c7a 171 {
JMF 12:0071cb144c7a 172 int ret;
JMF 12:0071cb144c7a 173 unsigned char buf[MBEDTLS_MPI_MAX_SIZE * 2 + 20]; /* tag, length + 2xMPI */
JMF 12:0071cb144c7a 174 unsigned char *c = buf + sizeof(buf);
JMF 12:0071cb144c7a 175 size_t len = 0;
JMF 12:0071cb144c7a 176
JMF 12:0071cb144c7a 177 memset( buf, 0, sizeof(buf) );
JMF 12:0071cb144c7a 178 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_pk_write_pubkey( &c, buf, ctx->subject_key ) );
JMF 12:0071cb144c7a 179
JMF 12:0071cb144c7a 180 mbedtls_sha1( buf + sizeof(buf) - len, len, buf + sizeof(buf) - 20 );
JMF 12:0071cb144c7a 181 c = buf + sizeof(buf) - 20;
JMF 12:0071cb144c7a 182 len = 20;
JMF 12:0071cb144c7a 183
JMF 12:0071cb144c7a 184 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
JMF 12:0071cb144c7a 185 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_OCTET_STRING ) );
JMF 12:0071cb144c7a 186
JMF 12:0071cb144c7a 187 return mbedtls_x509write_crt_set_extension( ctx, MBEDTLS_OID_SUBJECT_KEY_IDENTIFIER,
JMF 12:0071cb144c7a 188 MBEDTLS_OID_SIZE( MBEDTLS_OID_SUBJECT_KEY_IDENTIFIER ),
JMF 12:0071cb144c7a 189 0, buf + sizeof(buf) - len, len );
JMF 12:0071cb144c7a 190 }
JMF 12:0071cb144c7a 191
JMF 12:0071cb144c7a 192 int mbedtls_x509write_crt_set_authority_key_identifier( mbedtls_x509write_cert *ctx )
JMF 12:0071cb144c7a 193 {
JMF 12:0071cb144c7a 194 int ret;
JMF 12:0071cb144c7a 195 unsigned char buf[MBEDTLS_MPI_MAX_SIZE * 2 + 20]; /* tag, length + 2xMPI */
JMF 12:0071cb144c7a 196 unsigned char *c = buf + sizeof(buf);
JMF 12:0071cb144c7a 197 size_t len = 0;
JMF 12:0071cb144c7a 198
JMF 12:0071cb144c7a 199 memset( buf, 0, sizeof(buf) );
JMF 12:0071cb144c7a 200 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_pk_write_pubkey( &c, buf, ctx->issuer_key ) );
JMF 12:0071cb144c7a 201
JMF 12:0071cb144c7a 202 mbedtls_sha1( buf + sizeof(buf) - len, len, buf + sizeof(buf) - 20 );
JMF 12:0071cb144c7a 203 c = buf + sizeof(buf) - 20;
JMF 12:0071cb144c7a 204 len = 20;
JMF 12:0071cb144c7a 205
JMF 12:0071cb144c7a 206 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
JMF 12:0071cb144c7a 207 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_CONTEXT_SPECIFIC | 0 ) );
JMF 12:0071cb144c7a 208
JMF 12:0071cb144c7a 209 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
JMF 12:0071cb144c7a 210 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_CONSTRUCTED |
JMF 12:0071cb144c7a 211 MBEDTLS_ASN1_SEQUENCE ) );
JMF 12:0071cb144c7a 212
JMF 12:0071cb144c7a 213 return mbedtls_x509write_crt_set_extension( ctx, MBEDTLS_OID_AUTHORITY_KEY_IDENTIFIER,
JMF 12:0071cb144c7a 214 MBEDTLS_OID_SIZE( MBEDTLS_OID_AUTHORITY_KEY_IDENTIFIER ),
JMF 12:0071cb144c7a 215 0, buf + sizeof(buf) - len, len );
JMF 12:0071cb144c7a 216 }
JMF 12:0071cb144c7a 217 #endif /* MBEDTLS_SHA1_C */
JMF 12:0071cb144c7a 218
JMF 12:0071cb144c7a 219 int mbedtls_x509write_crt_set_key_usage( mbedtls_x509write_cert *ctx,
JMF 12:0071cb144c7a 220 unsigned int key_usage )
JMF 12:0071cb144c7a 221 {
JMF 12:0071cb144c7a 222 unsigned char buf[4], ku;
JMF 12:0071cb144c7a 223 unsigned char *c;
JMF 12:0071cb144c7a 224 int ret;
JMF 12:0071cb144c7a 225
JMF 12:0071cb144c7a 226 /* We currently only support 7 bits, from 0x80 to 0x02 */
JMF 12:0071cb144c7a 227 if( ( key_usage & ~0xfe ) != 0 )
JMF 12:0071cb144c7a 228 return( MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE );
JMF 12:0071cb144c7a 229
JMF 12:0071cb144c7a 230 c = buf + 4;
JMF 12:0071cb144c7a 231 ku = (unsigned char) key_usage;
JMF 12:0071cb144c7a 232
JMF 12:0071cb144c7a 233 if( ( ret = mbedtls_asn1_write_bitstring( &c, buf, &ku, 7 ) ) != 4 )
JMF 12:0071cb144c7a 234 return( ret );
JMF 12:0071cb144c7a 235
JMF 12:0071cb144c7a 236 ret = mbedtls_x509write_crt_set_extension( ctx, MBEDTLS_OID_KEY_USAGE,
JMF 12:0071cb144c7a 237 MBEDTLS_OID_SIZE( MBEDTLS_OID_KEY_USAGE ),
JMF 12:0071cb144c7a 238 1, buf, 4 );
JMF 12:0071cb144c7a 239 if( ret != 0 )
JMF 12:0071cb144c7a 240 return( ret );
JMF 12:0071cb144c7a 241
JMF 12:0071cb144c7a 242 return( 0 );
JMF 12:0071cb144c7a 243 }
JMF 12:0071cb144c7a 244
JMF 12:0071cb144c7a 245 int mbedtls_x509write_crt_set_ns_cert_type( mbedtls_x509write_cert *ctx,
JMF 12:0071cb144c7a 246 unsigned char ns_cert_type )
JMF 12:0071cb144c7a 247 {
JMF 12:0071cb144c7a 248 unsigned char buf[4];
JMF 12:0071cb144c7a 249 unsigned char *c;
JMF 12:0071cb144c7a 250 int ret;
JMF 12:0071cb144c7a 251
JMF 12:0071cb144c7a 252 c = buf + 4;
JMF 12:0071cb144c7a 253
JMF 12:0071cb144c7a 254 if( ( ret = mbedtls_asn1_write_bitstring( &c, buf, &ns_cert_type, 8 ) ) != 4 )
JMF 12:0071cb144c7a 255 return( ret );
JMF 12:0071cb144c7a 256
JMF 12:0071cb144c7a 257 ret = mbedtls_x509write_crt_set_extension( ctx, MBEDTLS_OID_NS_CERT_TYPE,
JMF 12:0071cb144c7a 258 MBEDTLS_OID_SIZE( MBEDTLS_OID_NS_CERT_TYPE ),
JMF 12:0071cb144c7a 259 0, buf, 4 );
JMF 12:0071cb144c7a 260 if( ret != 0 )
JMF 12:0071cb144c7a 261 return( ret );
JMF 12:0071cb144c7a 262
JMF 12:0071cb144c7a 263 return( 0 );
JMF 12:0071cb144c7a 264 }
JMF 12:0071cb144c7a 265
JMF 12:0071cb144c7a 266 static int x509_write_time( unsigned char **p, unsigned char *start,
JMF 12:0071cb144c7a 267 const char *time, size_t size )
JMF 12:0071cb144c7a 268 {
JMF 12:0071cb144c7a 269 int ret;
JMF 12:0071cb144c7a 270 size_t len = 0;
JMF 12:0071cb144c7a 271
JMF 12:0071cb144c7a 272 /*
JMF 12:0071cb144c7a 273 * write MBEDTLS_ASN1_UTC_TIME if year < 2050 (2 bytes shorter)
JMF 12:0071cb144c7a 274 */
JMF 12:0071cb144c7a 275 if( time[0] == '2' && time[1] == '0' && time [2] < '5' )
JMF 12:0071cb144c7a 276 {
JMF 12:0071cb144c7a 277 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start,
JMF 12:0071cb144c7a 278 (const unsigned char *) time + 2,
JMF 12:0071cb144c7a 279 size - 2 ) );
JMF 12:0071cb144c7a 280 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
JMF 12:0071cb144c7a 281 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_UTC_TIME ) );
JMF 12:0071cb144c7a 282 }
JMF 12:0071cb144c7a 283 else
JMF 12:0071cb144c7a 284 {
JMF 12:0071cb144c7a 285 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start,
JMF 12:0071cb144c7a 286 (const unsigned char *) time,
JMF 12:0071cb144c7a 287 size ) );
JMF 12:0071cb144c7a 288 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
JMF 12:0071cb144c7a 289 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_GENERALIZED_TIME ) );
JMF 12:0071cb144c7a 290 }
JMF 12:0071cb144c7a 291
JMF 12:0071cb144c7a 292 return( (int) len );
JMF 12:0071cb144c7a 293 }
JMF 12:0071cb144c7a 294
JMF 12:0071cb144c7a 295 int mbedtls_x509write_crt_der( mbedtls_x509write_cert *ctx, unsigned char *buf, size_t size,
JMF 12:0071cb144c7a 296 int (*f_rng)(void *, unsigned char *, size_t),
JMF 12:0071cb144c7a 297 void *p_rng )
JMF 12:0071cb144c7a 298 {
JMF 12:0071cb144c7a 299 int ret;
JMF 12:0071cb144c7a 300 const char *sig_oid;
JMF 12:0071cb144c7a 301 size_t sig_oid_len = 0;
JMF 12:0071cb144c7a 302 unsigned char *c, *c2;
JMF 12:0071cb144c7a 303 unsigned char hash[64];
JMF 12:0071cb144c7a 304 unsigned char sig[MBEDTLS_MPI_MAX_SIZE];
JMF 12:0071cb144c7a 305 unsigned char tmp_buf[2048];
JMF 12:0071cb144c7a 306 size_t sub_len = 0, pub_len = 0, sig_and_oid_len = 0, sig_len;
JMF 12:0071cb144c7a 307 size_t len = 0;
JMF 12:0071cb144c7a 308 mbedtls_pk_type_t pk_alg;
JMF 12:0071cb144c7a 309
JMF 12:0071cb144c7a 310 /*
JMF 12:0071cb144c7a 311 * Prepare data to be signed in tmp_buf
JMF 12:0071cb144c7a 312 */
JMF 12:0071cb144c7a 313 c = tmp_buf + sizeof( tmp_buf );
JMF 12:0071cb144c7a 314
JMF 12:0071cb144c7a 315 /* Signature algorithm needed in TBS, and later for actual signature */
JMF 12:0071cb144c7a 316 pk_alg = mbedtls_pk_get_type( ctx->issuer_key );
JMF 12:0071cb144c7a 317 if( pk_alg == MBEDTLS_PK_ECKEY )
JMF 12:0071cb144c7a 318 pk_alg = MBEDTLS_PK_ECDSA;
JMF 12:0071cb144c7a 319
JMF 12:0071cb144c7a 320 if( ( ret = mbedtls_oid_get_oid_by_sig_alg( pk_alg, ctx->md_alg,
JMF 12:0071cb144c7a 321 &sig_oid, &sig_oid_len ) ) != 0 )
JMF 12:0071cb144c7a 322 {
JMF 12:0071cb144c7a 323 return( ret );
JMF 12:0071cb144c7a 324 }
JMF 12:0071cb144c7a 325
JMF 12:0071cb144c7a 326 /*
JMF 12:0071cb144c7a 327 * Extensions ::= SEQUENCE SIZE (1..MAX) OF Extension
JMF 12:0071cb144c7a 328 */
JMF 12:0071cb144c7a 329 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_x509_write_extensions( &c, tmp_buf, ctx->extensions ) );
JMF 12:0071cb144c7a 330 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) );
JMF 12:0071cb144c7a 331 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED |
JMF 12:0071cb144c7a 332 MBEDTLS_ASN1_SEQUENCE ) );
JMF 12:0071cb144c7a 333 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) );
JMF 12:0071cb144c7a 334 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONTEXT_SPECIFIC |
JMF 12:0071cb144c7a 335 MBEDTLS_ASN1_CONSTRUCTED | 3 ) );
JMF 12:0071cb144c7a 336
JMF 12:0071cb144c7a 337 /*
JMF 12:0071cb144c7a 338 * SubjectPublicKeyInfo
JMF 12:0071cb144c7a 339 */
JMF 12:0071cb144c7a 340 MBEDTLS_ASN1_CHK_ADD( pub_len, mbedtls_pk_write_pubkey_der( ctx->subject_key,
JMF 12:0071cb144c7a 341 tmp_buf, c - tmp_buf ) );
JMF 12:0071cb144c7a 342 c -= pub_len;
JMF 12:0071cb144c7a 343 len += pub_len;
JMF 12:0071cb144c7a 344
JMF 12:0071cb144c7a 345 /*
JMF 12:0071cb144c7a 346 * Subject ::= Name
JMF 12:0071cb144c7a 347 */
JMF 12:0071cb144c7a 348 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_x509_write_names( &c, tmp_buf, ctx->subject ) );
JMF 12:0071cb144c7a 349
JMF 12:0071cb144c7a 350 /*
JMF 12:0071cb144c7a 351 * Validity ::= SEQUENCE {
JMF 12:0071cb144c7a 352 * notBefore Time,
JMF 12:0071cb144c7a 353 * notAfter Time }
JMF 12:0071cb144c7a 354 */
JMF 12:0071cb144c7a 355 sub_len = 0;
JMF 12:0071cb144c7a 356
JMF 12:0071cb144c7a 357 MBEDTLS_ASN1_CHK_ADD( sub_len, x509_write_time( &c, tmp_buf, ctx->not_after,
JMF 12:0071cb144c7a 358 MBEDTLS_X509_RFC5280_UTC_TIME_LEN ) );
JMF 12:0071cb144c7a 359
JMF 12:0071cb144c7a 360 MBEDTLS_ASN1_CHK_ADD( sub_len, x509_write_time( &c, tmp_buf, ctx->not_before,
JMF 12:0071cb144c7a 361 MBEDTLS_X509_RFC5280_UTC_TIME_LEN ) );
JMF 12:0071cb144c7a 362
JMF 12:0071cb144c7a 363 len += sub_len;
JMF 12:0071cb144c7a 364 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, sub_len ) );
JMF 12:0071cb144c7a 365 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED |
JMF 12:0071cb144c7a 366 MBEDTLS_ASN1_SEQUENCE ) );
JMF 12:0071cb144c7a 367
JMF 12:0071cb144c7a 368 /*
JMF 12:0071cb144c7a 369 * Issuer ::= Name
JMF 12:0071cb144c7a 370 */
JMF 12:0071cb144c7a 371 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_x509_write_names( &c, tmp_buf, ctx->issuer ) );
JMF 12:0071cb144c7a 372
JMF 12:0071cb144c7a 373 /*
JMF 12:0071cb144c7a 374 * Signature ::= AlgorithmIdentifier
JMF 12:0071cb144c7a 375 */
JMF 12:0071cb144c7a 376 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_algorithm_identifier( &c, tmp_buf,
JMF 12:0071cb144c7a 377 sig_oid, strlen( sig_oid ), 0 ) );
JMF 12:0071cb144c7a 378
JMF 12:0071cb144c7a 379 /*
JMF 12:0071cb144c7a 380 * Serial ::= INTEGER
JMF 12:0071cb144c7a 381 */
JMF 12:0071cb144c7a 382 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_mpi( &c, tmp_buf, &ctx->serial ) );
JMF 12:0071cb144c7a 383
JMF 12:0071cb144c7a 384 /*
JMF 12:0071cb144c7a 385 * Version ::= INTEGER { v1(0), v2(1), v3(2) }
JMF 12:0071cb144c7a 386 */
JMF 12:0071cb144c7a 387 sub_len = 0;
JMF 12:0071cb144c7a 388 MBEDTLS_ASN1_CHK_ADD( sub_len, mbedtls_asn1_write_int( &c, tmp_buf, ctx->version ) );
JMF 12:0071cb144c7a 389 len += sub_len;
JMF 12:0071cb144c7a 390 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, sub_len ) );
JMF 12:0071cb144c7a 391 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONTEXT_SPECIFIC |
JMF 12:0071cb144c7a 392 MBEDTLS_ASN1_CONSTRUCTED | 0 ) );
JMF 12:0071cb144c7a 393
JMF 12:0071cb144c7a 394 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) );
JMF 12:0071cb144c7a 395 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED |
JMF 12:0071cb144c7a 396 MBEDTLS_ASN1_SEQUENCE ) );
JMF 12:0071cb144c7a 397
JMF 12:0071cb144c7a 398 /*
JMF 12:0071cb144c7a 399 * Make signature
JMF 12:0071cb144c7a 400 */
JMF 12:0071cb144c7a 401 mbedtls_md( mbedtls_md_info_from_type( ctx->md_alg ), c, len, hash );
JMF 12:0071cb144c7a 402
JMF 12:0071cb144c7a 403 if( ( ret = mbedtls_pk_sign( ctx->issuer_key, ctx->md_alg, hash, 0, sig, &sig_len,
JMF 12:0071cb144c7a 404 f_rng, p_rng ) ) != 0 )
JMF 12:0071cb144c7a 405 {
JMF 12:0071cb144c7a 406 return( ret );
JMF 12:0071cb144c7a 407 }
JMF 12:0071cb144c7a 408
JMF 12:0071cb144c7a 409 /*
JMF 12:0071cb144c7a 410 * Write data to output buffer
JMF 12:0071cb144c7a 411 */
JMF 12:0071cb144c7a 412 c2 = buf + size;
JMF 12:0071cb144c7a 413 MBEDTLS_ASN1_CHK_ADD( sig_and_oid_len, mbedtls_x509_write_sig( &c2, buf,
JMF 12:0071cb144c7a 414 sig_oid, sig_oid_len, sig, sig_len ) );
JMF 12:0071cb144c7a 415
JMF 12:0071cb144c7a 416 c2 -= len;
JMF 12:0071cb144c7a 417 memcpy( c2, c, len );
JMF 12:0071cb144c7a 418
JMF 12:0071cb144c7a 419 len += sig_and_oid_len;
JMF 12:0071cb144c7a 420 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c2, buf, len ) );
JMF 12:0071cb144c7a 421 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c2, buf, MBEDTLS_ASN1_CONSTRUCTED |
JMF 12:0071cb144c7a 422 MBEDTLS_ASN1_SEQUENCE ) );
JMF 12:0071cb144c7a 423
JMF 12:0071cb144c7a 424 return( (int) len );
JMF 12:0071cb144c7a 425 }
JMF 12:0071cb144c7a 426
JMF 12:0071cb144c7a 427 #define PEM_BEGIN_CRT "-----BEGIN CERTIFICATE-----\n"
JMF 12:0071cb144c7a 428 #define PEM_END_CRT "-----END CERTIFICATE-----\n"
JMF 12:0071cb144c7a 429
JMF 12:0071cb144c7a 430 #if defined(MBEDTLS_PEM_WRITE_C)
JMF 12:0071cb144c7a 431 int mbedtls_x509write_crt_pem( mbedtls_x509write_cert *crt, unsigned char *buf, size_t size,
JMF 12:0071cb144c7a 432 int (*f_rng)(void *, unsigned char *, size_t),
JMF 12:0071cb144c7a 433 void *p_rng )
JMF 12:0071cb144c7a 434 {
JMF 12:0071cb144c7a 435 int ret;
JMF 12:0071cb144c7a 436 unsigned char output_buf[4096];
JMF 12:0071cb144c7a 437 size_t olen = 0;
JMF 12:0071cb144c7a 438
JMF 12:0071cb144c7a 439 if( ( ret = mbedtls_x509write_crt_der( crt, output_buf, sizeof(output_buf),
JMF 12:0071cb144c7a 440 f_rng, p_rng ) ) < 0 )
JMF 12:0071cb144c7a 441 {
JMF 12:0071cb144c7a 442 return( ret );
JMF 12:0071cb144c7a 443 }
JMF 12:0071cb144c7a 444
JMF 12:0071cb144c7a 445 if( ( ret = mbedtls_pem_write_buffer( PEM_BEGIN_CRT, PEM_END_CRT,
JMF 12:0071cb144c7a 446 output_buf + sizeof(output_buf) - ret,
JMF 12:0071cb144c7a 447 ret, buf, size, &olen ) ) != 0 )
JMF 12:0071cb144c7a 448 {
JMF 12:0071cb144c7a 449 return( ret );
JMF 12:0071cb144c7a 450 }
JMF 12:0071cb144c7a 451
JMF 12:0071cb144c7a 452 return( 0 );
JMF 12:0071cb144c7a 453 }
JMF 12:0071cb144c7a 454 #endif /* MBEDTLS_PEM_WRITE_C */
JMF 12:0071cb144c7a 455
JMF 12:0071cb144c7a 456 #endif /* MBEDTLS_X509_CRT_WRITE_C */