Avnet / WNCInterface

The WDCInterface is is a drop-in replacement for an EthernetInterface class that allows the user to connect to the Internet with a Wistron NeWeb Corporation (WNC) M14A2A Series data module using the standard network Socket API's. This interface class is used in the AT&T Cellular IoT Starter Kit which is sold by Avnet (http://cloudconnectkits.org/product/att-cellular-iot-starter-kit).

Dependencies:   WncControllerK64F

Dependents:   WNCProximityMqtt Pubnub_ATT_IoT_SK_WNC_sync BluemixDemo BluemixQS ... more

See the WNCInterface README in the Wiki tab for detailed information on this library.

mbedtls/source/asn1write.c@29:b278b745fb4f, 2017-03-24 (annotated)

Committer:
JMF
Date:
Fri Mar 24 22:26:23 2017 +0000
Revision:
29:b278b745fb4f
Parent:
12:0071cb144c7a 
updated Class name of TCPSocketConnection to WncTCPSocketConnection;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JMF 12:0071cb144c7a 1 /*
JMF 12:0071cb144c7a 2 * ASN.1 buffer writing functionality
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 #if !defined(MBEDTLS_CONFIG_FILE)
JMF 12:0071cb144c7a 23 #include "mbedtls/config.h"
JMF 12:0071cb144c7a 24 #else
JMF 12:0071cb144c7a 25 #include MBEDTLS_CONFIG_FILE
JMF 12:0071cb144c7a 26 #endif
JMF 12:0071cb144c7a 27
JMF 12:0071cb144c7a 28 #if defined(MBEDTLS_ASN1_WRITE_C)
JMF 12:0071cb144c7a 29
JMF 12:0071cb144c7a 30 #include "mbedtls/asn1write.h"
JMF 12:0071cb144c7a 31
JMF 12:0071cb144c7a 32 #include <string.h>
JMF 12:0071cb144c7a 33
JMF 12:0071cb144c7a 34 #if defined(MBEDTLS_PLATFORM_C)
JMF 12:0071cb144c7a 35 #include "mbedtls/platform.h"
JMF 12:0071cb144c7a 36 #else
JMF 12:0071cb144c7a 37 #include <stdlib.h>
JMF 12:0071cb144c7a 38 #define mbedtls_calloc calloc
JMF 12:0071cb144c7a 39 #define mbedtls_free free
JMF 12:0071cb144c7a 40 #endif
JMF 12:0071cb144c7a 41
JMF 12:0071cb144c7a 42 int mbedtls_asn1_write_len( unsigned char **p, unsigned char *start, size_t len )
JMF 12:0071cb144c7a 43 {
JMF 12:0071cb144c7a 44 if( len < 0x80 )
JMF 12:0071cb144c7a 45 {
JMF 12:0071cb144c7a 46 if( *p - start < 1 )
JMF 12:0071cb144c7a 47 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
JMF 12:0071cb144c7a 48
JMF 12:0071cb144c7a 49 *--(*p) = (unsigned char) len;
JMF 12:0071cb144c7a 50 return( 1 );
JMF 12:0071cb144c7a 51 }
JMF 12:0071cb144c7a 52
JMF 12:0071cb144c7a 53 if( len <= 0xFF )
JMF 12:0071cb144c7a 54 {
JMF 12:0071cb144c7a 55 if( *p - start < 2 )
JMF 12:0071cb144c7a 56 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
JMF 12:0071cb144c7a 57
JMF 12:0071cb144c7a 58 *--(*p) = (unsigned char) len;
JMF 12:0071cb144c7a 59 *--(*p) = 0x81;
JMF 12:0071cb144c7a 60 return( 2 );
JMF 12:0071cb144c7a 61 }
JMF 12:0071cb144c7a 62
JMF 12:0071cb144c7a 63 if( *p - start < 3 )
JMF 12:0071cb144c7a 64 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
JMF 12:0071cb144c7a 65
JMF 12:0071cb144c7a 66 // We assume we never have lengths larger than 65535 bytes
JMF 12:0071cb144c7a 67 //
JMF 12:0071cb144c7a 68 *--(*p) = len % 256;
JMF 12:0071cb144c7a 69 *--(*p) = ( len / 256 ) % 256;
JMF 12:0071cb144c7a 70 *--(*p) = 0x82;
JMF 12:0071cb144c7a 71
JMF 12:0071cb144c7a 72 return( 3 );
JMF 12:0071cb144c7a 73 }
JMF 12:0071cb144c7a 74
JMF 12:0071cb144c7a 75 int mbedtls_asn1_write_tag( unsigned char **p, unsigned char *start, unsigned char tag )
JMF 12:0071cb144c7a 76 {
JMF 12:0071cb144c7a 77 if( *p - start < 1 )
JMF 12:0071cb144c7a 78 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
JMF 12:0071cb144c7a 79
JMF 12:0071cb144c7a 80 *--(*p) = tag;
JMF 12:0071cb144c7a 81
JMF 12:0071cb144c7a 82 return( 1 );
JMF 12:0071cb144c7a 83 }
JMF 12:0071cb144c7a 84
JMF 12:0071cb144c7a 85 int mbedtls_asn1_write_raw_buffer( unsigned char **p, unsigned char *start,
JMF 12:0071cb144c7a 86 const unsigned char *buf, size_t size )
JMF 12:0071cb144c7a 87 {
JMF 12:0071cb144c7a 88 size_t len = 0;
JMF 12:0071cb144c7a 89
JMF 12:0071cb144c7a 90 if( *p < start || (size_t)( *p - start ) < size )
JMF 12:0071cb144c7a 91 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
JMF 12:0071cb144c7a 92
JMF 12:0071cb144c7a 93 len = size;
JMF 12:0071cb144c7a 94 (*p) -= len;
JMF 12:0071cb144c7a 95 memcpy( *p, buf, len );
JMF 12:0071cb144c7a 96
JMF 12:0071cb144c7a 97 return( (int) len );
JMF 12:0071cb144c7a 98 }
JMF 12:0071cb144c7a 99
JMF 12:0071cb144c7a 100 #if defined(MBEDTLS_BIGNUM_C)
JMF 12:0071cb144c7a 101 int mbedtls_asn1_write_mpi( unsigned char **p, unsigned char *start, const mbedtls_mpi *X )
JMF 12:0071cb144c7a 102 {
JMF 12:0071cb144c7a 103 int ret;
JMF 12:0071cb144c7a 104 size_t len = 0;
JMF 12:0071cb144c7a 105
JMF 12:0071cb144c7a 106 // Write the MPI
JMF 12:0071cb144c7a 107 //
JMF 12:0071cb144c7a 108 len = mbedtls_mpi_size( X );
JMF 12:0071cb144c7a 109
JMF 12:0071cb144c7a 110 if( *p < start || (size_t)( *p - start ) < len )
JMF 12:0071cb144c7a 111 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
JMF 12:0071cb144c7a 112
JMF 12:0071cb144c7a 113 (*p) -= len;
JMF 12:0071cb144c7a 114 MBEDTLS_MPI_CHK( mbedtls_mpi_write_binary( X, *p, len ) );
JMF 12:0071cb144c7a 115
JMF 12:0071cb144c7a 116 // DER format assumes 2s complement for numbers, so the leftmost bit
JMF 12:0071cb144c7a 117 // should be 0 for positive numbers and 1 for negative numbers.
JMF 12:0071cb144c7a 118 //
JMF 12:0071cb144c7a 119 if( X->s ==1 && **p & 0x80 )
JMF 12:0071cb144c7a 120 {
JMF 12:0071cb144c7a 121 if( *p - start < 1 )
JMF 12:0071cb144c7a 122 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
JMF 12:0071cb144c7a 123
JMF 12:0071cb144c7a 124 *--(*p) = 0x00;
JMF 12:0071cb144c7a 125 len += 1;
JMF 12:0071cb144c7a 126 }
JMF 12:0071cb144c7a 127
JMF 12:0071cb144c7a 128 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
JMF 12:0071cb144c7a 129 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_INTEGER ) );
JMF 12:0071cb144c7a 130
JMF 12:0071cb144c7a 131 ret = (int) len;
JMF 12:0071cb144c7a 132
JMF 12:0071cb144c7a 133 cleanup:
JMF 12:0071cb144c7a 134 return( ret );
JMF 12:0071cb144c7a 135 }
JMF 12:0071cb144c7a 136 #endif /* MBEDTLS_BIGNUM_C */
JMF 12:0071cb144c7a 137
JMF 12:0071cb144c7a 138 int mbedtls_asn1_write_null( unsigned char **p, unsigned char *start )
JMF 12:0071cb144c7a 139 {
JMF 12:0071cb144c7a 140 int ret;
JMF 12:0071cb144c7a 141 size_t len = 0;
JMF 12:0071cb144c7a 142
JMF 12:0071cb144c7a 143 // Write NULL
JMF 12:0071cb144c7a 144 //
JMF 12:0071cb144c7a 145 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, 0) );
JMF 12:0071cb144c7a 146 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_NULL ) );
JMF 12:0071cb144c7a 147
JMF 12:0071cb144c7a 148 return( (int) len );
JMF 12:0071cb144c7a 149 }
JMF 12:0071cb144c7a 150
JMF 12:0071cb144c7a 151 int mbedtls_asn1_write_oid( unsigned char **p, unsigned char *start,
JMF 12:0071cb144c7a 152 const char *oid, size_t oid_len )
JMF 12:0071cb144c7a 153 {
JMF 12:0071cb144c7a 154 int ret;
JMF 12:0071cb144c7a 155 size_t len = 0;
JMF 12:0071cb144c7a 156
JMF 12:0071cb144c7a 157 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start,
JMF 12:0071cb144c7a 158 (const unsigned char *) oid, oid_len ) );
JMF 12:0071cb144c7a 159 MBEDTLS_ASN1_CHK_ADD( len , mbedtls_asn1_write_len( p, start, len ) );
JMF 12:0071cb144c7a 160 MBEDTLS_ASN1_CHK_ADD( len , mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OID ) );
JMF 12:0071cb144c7a 161
JMF 12:0071cb144c7a 162 return( (int) len );
JMF 12:0071cb144c7a 163 }
JMF 12:0071cb144c7a 164
JMF 12:0071cb144c7a 165 int mbedtls_asn1_write_algorithm_identifier( unsigned char **p, unsigned char *start,
JMF 12:0071cb144c7a 166 const char *oid, size_t oid_len,
JMF 12:0071cb144c7a 167 size_t par_len )
JMF 12:0071cb144c7a 168 {
JMF 12:0071cb144c7a 169 int ret;
JMF 12:0071cb144c7a 170 size_t len = 0;
JMF 12:0071cb144c7a 171
JMF 12:0071cb144c7a 172 if( par_len == 0 )
JMF 12:0071cb144c7a 173 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_null( p, start ) );
JMF 12:0071cb144c7a 174 else
JMF 12:0071cb144c7a 175 len += par_len;
JMF 12:0071cb144c7a 176
JMF 12:0071cb144c7a 177 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_oid( p, start, oid, oid_len ) );
JMF 12:0071cb144c7a 178
JMF 12:0071cb144c7a 179 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
JMF 12:0071cb144c7a 180 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start,
JMF 12:0071cb144c7a 181 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) );
JMF 12:0071cb144c7a 182
JMF 12:0071cb144c7a 183 return( (int) len );
JMF 12:0071cb144c7a 184 }
JMF 12:0071cb144c7a 185
JMF 12:0071cb144c7a 186 int mbedtls_asn1_write_bool( unsigned char **p, unsigned char *start, int boolean )
JMF 12:0071cb144c7a 187 {
JMF 12:0071cb144c7a 188 int ret;
JMF 12:0071cb144c7a 189 size_t len = 0;
JMF 12:0071cb144c7a 190
JMF 12:0071cb144c7a 191 if( *p - start < 1 )
JMF 12:0071cb144c7a 192 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
JMF 12:0071cb144c7a 193
JMF 12:0071cb144c7a 194 *--(*p) = (boolean) ? 255 : 0;
JMF 12:0071cb144c7a 195 len++;
JMF 12:0071cb144c7a 196
JMF 12:0071cb144c7a 197 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
JMF 12:0071cb144c7a 198 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_BOOLEAN ) );
JMF 12:0071cb144c7a 199
JMF 12:0071cb144c7a 200 return( (int) len );
JMF 12:0071cb144c7a 201 }
JMF 12:0071cb144c7a 202
JMF 12:0071cb144c7a 203 int mbedtls_asn1_write_int( unsigned char **p, unsigned char *start, int val )
JMF 12:0071cb144c7a 204 {
JMF 12:0071cb144c7a 205 int ret;
JMF 12:0071cb144c7a 206 size_t len = 0;
JMF 12:0071cb144c7a 207
JMF 12:0071cb144c7a 208 // TODO negative values and values larger than 128
JMF 12:0071cb144c7a 209 // DER format assumes 2s complement for numbers, so the leftmost bit
JMF 12:0071cb144c7a 210 // should be 0 for positive numbers and 1 for negative numbers.
JMF 12:0071cb144c7a 211 //
JMF 12:0071cb144c7a 212 if( *p - start < 1 )
JMF 12:0071cb144c7a 213 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
JMF 12:0071cb144c7a 214
JMF 12:0071cb144c7a 215 len += 1;
JMF 12:0071cb144c7a 216 *--(*p) = val;
JMF 12:0071cb144c7a 217
JMF 12:0071cb144c7a 218 if( val > 0 && **p & 0x80 )
JMF 12:0071cb144c7a 219 {
JMF 12:0071cb144c7a 220 if( *p - start < 1 )
JMF 12:0071cb144c7a 221 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
JMF 12:0071cb144c7a 222
JMF 12:0071cb144c7a 223 *--(*p) = 0x00;
JMF 12:0071cb144c7a 224 len += 1;
JMF 12:0071cb144c7a 225 }
JMF 12:0071cb144c7a 226
JMF 12:0071cb144c7a 227 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
JMF 12:0071cb144c7a 228 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_INTEGER ) );
JMF 12:0071cb144c7a 229
JMF 12:0071cb144c7a 230 return( (int) len );
JMF 12:0071cb144c7a 231 }
JMF 12:0071cb144c7a 232
JMF 12:0071cb144c7a 233 int mbedtls_asn1_write_printable_string( unsigned char **p, unsigned char *start,
JMF 12:0071cb144c7a 234 const char *text, size_t text_len )
JMF 12:0071cb144c7a 235 {
JMF 12:0071cb144c7a 236 int ret;
JMF 12:0071cb144c7a 237 size_t len = 0;
JMF 12:0071cb144c7a 238
JMF 12:0071cb144c7a 239 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start,
JMF 12:0071cb144c7a 240 (const unsigned char *) text, text_len ) );
JMF 12:0071cb144c7a 241
JMF 12:0071cb144c7a 242 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
JMF 12:0071cb144c7a 243 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_PRINTABLE_STRING ) );
JMF 12:0071cb144c7a 244
JMF 12:0071cb144c7a 245 return( (int) len );
JMF 12:0071cb144c7a 246 }
JMF 12:0071cb144c7a 247
JMF 12:0071cb144c7a 248 int mbedtls_asn1_write_ia5_string( unsigned char **p, unsigned char *start,
JMF 12:0071cb144c7a 249 const char *text, size_t text_len )
JMF 12:0071cb144c7a 250 {
JMF 12:0071cb144c7a 251 int ret;
JMF 12:0071cb144c7a 252 size_t len = 0;
JMF 12:0071cb144c7a 253
JMF 12:0071cb144c7a 254 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start,
JMF 12:0071cb144c7a 255 (const unsigned char *) text, text_len ) );
JMF 12:0071cb144c7a 256
JMF 12:0071cb144c7a 257 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
JMF 12:0071cb144c7a 258 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_IA5_STRING ) );
JMF 12:0071cb144c7a 259
JMF 12:0071cb144c7a 260 return( (int) len );
JMF 12:0071cb144c7a 261 }
JMF 12:0071cb144c7a 262
JMF 12:0071cb144c7a 263 int mbedtls_asn1_write_bitstring( unsigned char **p, unsigned char *start,
JMF 12:0071cb144c7a 264 const unsigned char *buf, size_t bits )
JMF 12:0071cb144c7a 265 {
JMF 12:0071cb144c7a 266 int ret;
JMF 12:0071cb144c7a 267 size_t len = 0, size;
JMF 12:0071cb144c7a 268
JMF 12:0071cb144c7a 269 size = ( bits / 8 ) + ( ( bits % 8 ) ? 1 : 0 );
JMF 12:0071cb144c7a 270
JMF 12:0071cb144c7a 271 // Calculate byte length
JMF 12:0071cb144c7a 272 //
JMF 12:0071cb144c7a 273 if( *p < start || (size_t)( *p - start ) < size + 1 )
JMF 12:0071cb144c7a 274 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
JMF 12:0071cb144c7a 275
JMF 12:0071cb144c7a 276 len = size + 1;
JMF 12:0071cb144c7a 277 (*p) -= size;
JMF 12:0071cb144c7a 278 memcpy( *p, buf, size );
JMF 12:0071cb144c7a 279
JMF 12:0071cb144c7a 280 // Write unused bits
JMF 12:0071cb144c7a 281 //
JMF 12:0071cb144c7a 282 *--(*p) = (unsigned char) (size * 8 - bits);
JMF 12:0071cb144c7a 283
JMF 12:0071cb144c7a 284 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
JMF 12:0071cb144c7a 285 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_BIT_STRING ) );
JMF 12:0071cb144c7a 286
JMF 12:0071cb144c7a 287 return( (int) len );
JMF 12:0071cb144c7a 288 }
JMF 12:0071cb144c7a 289
JMF 12:0071cb144c7a 290 int mbedtls_asn1_write_octet_string( unsigned char **p, unsigned char *start,
JMF 12:0071cb144c7a 291 const unsigned char *buf, size_t size )
JMF 12:0071cb144c7a 292 {
JMF 12:0071cb144c7a 293 int ret;
JMF 12:0071cb144c7a 294 size_t len = 0;
JMF 12:0071cb144c7a 295
JMF 12:0071cb144c7a 296 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start, buf, size ) );
JMF 12:0071cb144c7a 297
JMF 12:0071cb144c7a 298 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
JMF 12:0071cb144c7a 299 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OCTET_STRING ) );
JMF 12:0071cb144c7a 300
JMF 12:0071cb144c7a 301 return( (int) len );
JMF 12:0071cb144c7a 302 }
JMF 12:0071cb144c7a 303
JMF 12:0071cb144c7a 304 mbedtls_asn1_named_data *mbedtls_asn1_store_named_data( mbedtls_asn1_named_data **head,
JMF 12:0071cb144c7a 305 const char *oid, size_t oid_len,
JMF 12:0071cb144c7a 306 const unsigned char *val,
JMF 12:0071cb144c7a 307 size_t val_len )
JMF 12:0071cb144c7a 308 {
JMF 12:0071cb144c7a 309 mbedtls_asn1_named_data *cur;
JMF 12:0071cb144c7a 310
JMF 12:0071cb144c7a 311 if( ( cur = mbedtls_asn1_find_named_data( *head, oid, oid_len ) ) == NULL )
JMF 12:0071cb144c7a 312 {
JMF 12:0071cb144c7a 313 // Add new entry if not present yet based on OID
JMF 12:0071cb144c7a 314 //
JMF 12:0071cb144c7a 315 cur = (mbedtls_asn1_named_data*)mbedtls_calloc( 1,
JMF 12:0071cb144c7a 316 sizeof(mbedtls_asn1_named_data) );
JMF 12:0071cb144c7a 317 if( cur == NULL )
JMF 12:0071cb144c7a 318 return( NULL );
JMF 12:0071cb144c7a 319
JMF 12:0071cb144c7a 320 cur->oid.len = oid_len;
JMF 12:0071cb144c7a 321 cur->oid.p = mbedtls_calloc( 1, oid_len );
JMF 12:0071cb144c7a 322 if( cur->oid.p == NULL )
JMF 12:0071cb144c7a 323 {
JMF 12:0071cb144c7a 324 mbedtls_free( cur );
JMF 12:0071cb144c7a 325 return( NULL );
JMF 12:0071cb144c7a 326 }
JMF 12:0071cb144c7a 327
JMF 12:0071cb144c7a 328 memcpy( cur->oid.p, oid, oid_len );
JMF 12:0071cb144c7a 329
JMF 12:0071cb144c7a 330 cur->val.len = val_len;
JMF 12:0071cb144c7a 331 cur->val.p = mbedtls_calloc( 1, val_len );
JMF 12:0071cb144c7a 332 if( cur->val.p == NULL )
JMF 12:0071cb144c7a 333 {
JMF 12:0071cb144c7a 334 mbedtls_free( cur->oid.p );
JMF 12:0071cb144c7a 335 mbedtls_free( cur );
JMF 12:0071cb144c7a 336 return( NULL );
JMF 12:0071cb144c7a 337 }
JMF 12:0071cb144c7a 338
JMF 12:0071cb144c7a 339 cur->next = *head;
JMF 12:0071cb144c7a 340 *head = cur;
JMF 12:0071cb144c7a 341 }
JMF 12:0071cb144c7a 342 else if( cur->val.len < val_len )
JMF 12:0071cb144c7a 343 {
JMF 12:0071cb144c7a 344 /*
JMF 12:0071cb144c7a 345 * Enlarge existing value buffer if needed
JMF 12:0071cb144c7a 346 * Preserve old data until the allocation succeeded, to leave list in
JMF 12:0071cb144c7a 347 * a consistent state in case allocation fails.
JMF 12:0071cb144c7a 348 */
JMF 12:0071cb144c7a 349 void *p = mbedtls_calloc( 1, val_len );
JMF 12:0071cb144c7a 350 if( p == NULL )
JMF 12:0071cb144c7a 351 return( NULL );
JMF 12:0071cb144c7a 352
JMF 12:0071cb144c7a 353 mbedtls_free( cur->val.p );
JMF 12:0071cb144c7a 354 cur->val.p = p;
JMF 12:0071cb144c7a 355 cur->val.len = val_len;
JMF 12:0071cb144c7a 356 }
JMF 12:0071cb144c7a 357
JMF 12:0071cb144c7a 358 if( val != NULL )
JMF 12:0071cb144c7a 359 memcpy( cur->val.p, val, val_len );
JMF 12:0071cb144c7a 360
JMF 12:0071cb144c7a 361 return( cur );
JMF 12:0071cb144c7a 362 }
JMF 12:0071cb144c7a 363 #endif /* MBEDTLS_ASN1_WRITE_C */