Kev Mann / mbed-dev-OS5_10_4

RTC auf true

features/mbedtls/src/asn1parse.c@0:38ceb79fef03, 2018-11-28 (annotated)

Committer:
kevman
Date:
Wed Nov 28 15:10:15 2018 +0000
Revision:
0:38ceb79fef03
RTC modified

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kevman 0:38ceb79fef03 1 /*
kevman 0:38ceb79fef03 2 * Generic ASN.1 parsing
kevman 0:38ceb79fef03 3 *
kevman 0:38ceb79fef03 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
kevman 0:38ceb79fef03 5 * SPDX-License-Identifier: Apache-2.0
kevman 0:38ceb79fef03 6 *
kevman 0:38ceb79fef03 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
kevman 0:38ceb79fef03 8 * not use this file except in compliance with the License.
kevman 0:38ceb79fef03 9 * You may obtain a copy of the License at
kevman 0:38ceb79fef03 10 *
kevman 0:38ceb79fef03 11 * http://www.apache.org/licenses/LICENSE-2.0
kevman 0:38ceb79fef03 12 *
kevman 0:38ceb79fef03 13 * Unless required by applicable law or agreed to in writing, software
kevman 0:38ceb79fef03 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
kevman 0:38ceb79fef03 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
kevman 0:38ceb79fef03 16 * See the License for the specific language governing permissions and
kevman 0:38ceb79fef03 17 * limitations under the License.
kevman 0:38ceb79fef03 18 *
kevman 0:38ceb79fef03 19 * This file is part of mbed TLS (https://tls.mbed.org)
kevman 0:38ceb79fef03 20 */
kevman 0:38ceb79fef03 21
kevman 0:38ceb79fef03 22 #if !defined(MBEDTLS_CONFIG_FILE)
kevman 0:38ceb79fef03 23 #include "mbedtls/config.h"
kevman 0:38ceb79fef03 24 #else
kevman 0:38ceb79fef03 25 #include MBEDTLS_CONFIG_FILE
kevman 0:38ceb79fef03 26 #endif
kevman 0:38ceb79fef03 27
kevman 0:38ceb79fef03 28 #if defined(MBEDTLS_ASN1_PARSE_C)
kevman 0:38ceb79fef03 29
kevman 0:38ceb79fef03 30 #include "mbedtls/asn1.h"
kevman 0:38ceb79fef03 31 #include "mbedtls/platform_util.h"
kevman 0:38ceb79fef03 32
kevman 0:38ceb79fef03 33 #include <string.h>
kevman 0:38ceb79fef03 34
kevman 0:38ceb79fef03 35 #if defined(MBEDTLS_BIGNUM_C)
kevman 0:38ceb79fef03 36 #include "mbedtls/bignum.h"
kevman 0:38ceb79fef03 37 #endif
kevman 0:38ceb79fef03 38
kevman 0:38ceb79fef03 39 #if defined(MBEDTLS_PLATFORM_C)
kevman 0:38ceb79fef03 40 #include "mbedtls/platform.h"
kevman 0:38ceb79fef03 41 #else
kevman 0:38ceb79fef03 42 #include <stdlib.h>
kevman 0:38ceb79fef03 43 #define mbedtls_calloc calloc
kevman 0:38ceb79fef03 44 #define mbedtls_free free
kevman 0:38ceb79fef03 45 #endif
kevman 0:38ceb79fef03 46
kevman 0:38ceb79fef03 47 /*
kevman 0:38ceb79fef03 48 * ASN.1 DER decoding routines
kevman 0:38ceb79fef03 49 */
kevman 0:38ceb79fef03 50 int mbedtls_asn1_get_len( unsigned char **p,
kevman 0:38ceb79fef03 51 const unsigned char *end,
kevman 0:38ceb79fef03 52 size_t *len )
kevman 0:38ceb79fef03 53 {
kevman 0:38ceb79fef03 54 if( ( end - *p ) < 1 )
kevman 0:38ceb79fef03 55 return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
kevman 0:38ceb79fef03 56
kevman 0:38ceb79fef03 57 if( ( **p & 0x80 ) == 0 )
kevman 0:38ceb79fef03 58 *len = *(*p)++;
kevman 0:38ceb79fef03 59 else
kevman 0:38ceb79fef03 60 {
kevman 0:38ceb79fef03 61 switch( **p & 0x7F )
kevman 0:38ceb79fef03 62 {
kevman 0:38ceb79fef03 63 case 1:
kevman 0:38ceb79fef03 64 if( ( end - *p ) < 2 )
kevman 0:38ceb79fef03 65 return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
kevman 0:38ceb79fef03 66
kevman 0:38ceb79fef03 67 *len = (*p)[1];
kevman 0:38ceb79fef03 68 (*p) += 2;
kevman 0:38ceb79fef03 69 break;
kevman 0:38ceb79fef03 70
kevman 0:38ceb79fef03 71 case 2:
kevman 0:38ceb79fef03 72 if( ( end - *p ) < 3 )
kevman 0:38ceb79fef03 73 return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
kevman 0:38ceb79fef03 74
kevman 0:38ceb79fef03 75 *len = ( (size_t)(*p)[1] << 8 ) | (*p)[2];
kevman 0:38ceb79fef03 76 (*p) += 3;
kevman 0:38ceb79fef03 77 break;
kevman 0:38ceb79fef03 78
kevman 0:38ceb79fef03 79 case 3:
kevman 0:38ceb79fef03 80 if( ( end - *p ) < 4 )
kevman 0:38ceb79fef03 81 return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
kevman 0:38ceb79fef03 82
kevman 0:38ceb79fef03 83 *len = ( (size_t)(*p)[1] << 16 ) |
kevman 0:38ceb79fef03 84 ( (size_t)(*p)[2] << 8 ) | (*p)[3];
kevman 0:38ceb79fef03 85 (*p) += 4;
kevman 0:38ceb79fef03 86 break;
kevman 0:38ceb79fef03 87
kevman 0:38ceb79fef03 88 case 4:
kevman 0:38ceb79fef03 89 if( ( end - *p ) < 5 )
kevman 0:38ceb79fef03 90 return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
kevman 0:38ceb79fef03 91
kevman 0:38ceb79fef03 92 *len = ( (size_t)(*p)[1] << 24 ) | ( (size_t)(*p)[2] << 16 ) |
kevman 0:38ceb79fef03 93 ( (size_t)(*p)[3] << 8 ) | (*p)[4];
kevman 0:38ceb79fef03 94 (*p) += 5;
kevman 0:38ceb79fef03 95 break;
kevman 0:38ceb79fef03 96
kevman 0:38ceb79fef03 97 default:
kevman 0:38ceb79fef03 98 return( MBEDTLS_ERR_ASN1_INVALID_LENGTH );
kevman 0:38ceb79fef03 99 }
kevman 0:38ceb79fef03 100 }
kevman 0:38ceb79fef03 101
kevman 0:38ceb79fef03 102 if( *len > (size_t) ( end - *p ) )
kevman 0:38ceb79fef03 103 return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
kevman 0:38ceb79fef03 104
kevman 0:38ceb79fef03 105 return( 0 );
kevman 0:38ceb79fef03 106 }
kevman 0:38ceb79fef03 107
kevman 0:38ceb79fef03 108 int mbedtls_asn1_get_tag( unsigned char **p,
kevman 0:38ceb79fef03 109 const unsigned char *end,
kevman 0:38ceb79fef03 110 size_t *len, int tag )
kevman 0:38ceb79fef03 111 {
kevman 0:38ceb79fef03 112 if( ( end - *p ) < 1 )
kevman 0:38ceb79fef03 113 return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
kevman 0:38ceb79fef03 114
kevman 0:38ceb79fef03 115 if( **p != tag )
kevman 0:38ceb79fef03 116 return( MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
kevman 0:38ceb79fef03 117
kevman 0:38ceb79fef03 118 (*p)++;
kevman 0:38ceb79fef03 119
kevman 0:38ceb79fef03 120 return( mbedtls_asn1_get_len( p, end, len ) );
kevman 0:38ceb79fef03 121 }
kevman 0:38ceb79fef03 122
kevman 0:38ceb79fef03 123 int mbedtls_asn1_get_bool( unsigned char **p,
kevman 0:38ceb79fef03 124 const unsigned char *end,
kevman 0:38ceb79fef03 125 int *val )
kevman 0:38ceb79fef03 126 {
kevman 0:38ceb79fef03 127 int ret;
kevman 0:38ceb79fef03 128 size_t len;
kevman 0:38ceb79fef03 129
kevman 0:38ceb79fef03 130 if( ( ret = mbedtls_asn1_get_tag( p, end, &len, MBEDTLS_ASN1_BOOLEAN ) ) != 0 )
kevman 0:38ceb79fef03 131 return( ret );
kevman 0:38ceb79fef03 132
kevman 0:38ceb79fef03 133 if( len != 1 )
kevman 0:38ceb79fef03 134 return( MBEDTLS_ERR_ASN1_INVALID_LENGTH );
kevman 0:38ceb79fef03 135
kevman 0:38ceb79fef03 136 *val = ( **p != 0 ) ? 1 : 0;
kevman 0:38ceb79fef03 137 (*p)++;
kevman 0:38ceb79fef03 138
kevman 0:38ceb79fef03 139 return( 0 );
kevman 0:38ceb79fef03 140 }
kevman 0:38ceb79fef03 141
kevman 0:38ceb79fef03 142 int mbedtls_asn1_get_int( unsigned char **p,
kevman 0:38ceb79fef03 143 const unsigned char *end,
kevman 0:38ceb79fef03 144 int *val )
kevman 0:38ceb79fef03 145 {
kevman 0:38ceb79fef03 146 int ret;
kevman 0:38ceb79fef03 147 size_t len;
kevman 0:38ceb79fef03 148
kevman 0:38ceb79fef03 149 if( ( ret = mbedtls_asn1_get_tag( p, end, &len, MBEDTLS_ASN1_INTEGER ) ) != 0 )
kevman 0:38ceb79fef03 150 return( ret );
kevman 0:38ceb79fef03 151
kevman 0:38ceb79fef03 152 if( len == 0 || len > sizeof( int ) || ( **p & 0x80 ) != 0 )
kevman 0:38ceb79fef03 153 return( MBEDTLS_ERR_ASN1_INVALID_LENGTH );
kevman 0:38ceb79fef03 154
kevman 0:38ceb79fef03 155 *val = 0;
kevman 0:38ceb79fef03 156
kevman 0:38ceb79fef03 157 while( len-- > 0 )
kevman 0:38ceb79fef03 158 {
kevman 0:38ceb79fef03 159 *val = ( *val << 8 ) | **p;
kevman 0:38ceb79fef03 160 (*p)++;
kevman 0:38ceb79fef03 161 }
kevman 0:38ceb79fef03 162
kevman 0:38ceb79fef03 163 return( 0 );
kevman 0:38ceb79fef03 164 }
kevman 0:38ceb79fef03 165
kevman 0:38ceb79fef03 166 #if defined(MBEDTLS_BIGNUM_C)
kevman 0:38ceb79fef03 167 int mbedtls_asn1_get_mpi( unsigned char **p,
kevman 0:38ceb79fef03 168 const unsigned char *end,
kevman 0:38ceb79fef03 169 mbedtls_mpi *X )
kevman 0:38ceb79fef03 170 {
kevman 0:38ceb79fef03 171 int ret;
kevman 0:38ceb79fef03 172 size_t len;
kevman 0:38ceb79fef03 173
kevman 0:38ceb79fef03 174 if( ( ret = mbedtls_asn1_get_tag( p, end, &len, MBEDTLS_ASN1_INTEGER ) ) != 0 )
kevman 0:38ceb79fef03 175 return( ret );
kevman 0:38ceb79fef03 176
kevman 0:38ceb79fef03 177 ret = mbedtls_mpi_read_binary( X, *p, len );
kevman 0:38ceb79fef03 178
kevman 0:38ceb79fef03 179 *p += len;
kevman 0:38ceb79fef03 180
kevman 0:38ceb79fef03 181 return( ret );
kevman 0:38ceb79fef03 182 }
kevman 0:38ceb79fef03 183 #endif /* MBEDTLS_BIGNUM_C */
kevman 0:38ceb79fef03 184
kevman 0:38ceb79fef03 185 int mbedtls_asn1_get_bitstring( unsigned char **p, const unsigned char *end,
kevman 0:38ceb79fef03 186 mbedtls_asn1_bitstring *bs)
kevman 0:38ceb79fef03 187 {
kevman 0:38ceb79fef03 188 int ret;
kevman 0:38ceb79fef03 189
kevman 0:38ceb79fef03 190 /* Certificate type is a single byte bitstring */
kevman 0:38ceb79fef03 191 if( ( ret = mbedtls_asn1_get_tag( p, end, &bs->len, MBEDTLS_ASN1_BIT_STRING ) ) != 0 )
kevman 0:38ceb79fef03 192 return( ret );
kevman 0:38ceb79fef03 193
kevman 0:38ceb79fef03 194 /* Check length, subtract one for actual bit string length */
kevman 0:38ceb79fef03 195 if( bs->len < 1 )
kevman 0:38ceb79fef03 196 return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
kevman 0:38ceb79fef03 197 bs->len -= 1;
kevman 0:38ceb79fef03 198
kevman 0:38ceb79fef03 199 /* Get number of unused bits, ensure unused bits <= 7 */
kevman 0:38ceb79fef03 200 bs->unused_bits = **p;
kevman 0:38ceb79fef03 201 if( bs->unused_bits > 7 )
kevman 0:38ceb79fef03 202 return( MBEDTLS_ERR_ASN1_INVALID_LENGTH );
kevman 0:38ceb79fef03 203 (*p)++;
kevman 0:38ceb79fef03 204
kevman 0:38ceb79fef03 205 /* Get actual bitstring */
kevman 0:38ceb79fef03 206 bs->p = *p;
kevman 0:38ceb79fef03 207 *p += bs->len;
kevman 0:38ceb79fef03 208
kevman 0:38ceb79fef03 209 if( *p != end )
kevman 0:38ceb79fef03 210 return( MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
kevman 0:38ceb79fef03 211
kevman 0:38ceb79fef03 212 return( 0 );
kevman 0:38ceb79fef03 213 }
kevman 0:38ceb79fef03 214
kevman 0:38ceb79fef03 215 /*
kevman 0:38ceb79fef03 216 * Get a bit string without unused bits
kevman 0:38ceb79fef03 217 */
kevman 0:38ceb79fef03 218 int mbedtls_asn1_get_bitstring_null( unsigned char **p, const unsigned char *end,
kevman 0:38ceb79fef03 219 size_t *len )
kevman 0:38ceb79fef03 220 {
kevman 0:38ceb79fef03 221 int ret;
kevman 0:38ceb79fef03 222
kevman 0:38ceb79fef03 223 if( ( ret = mbedtls_asn1_get_tag( p, end, len, MBEDTLS_ASN1_BIT_STRING ) ) != 0 )
kevman 0:38ceb79fef03 224 return( ret );
kevman 0:38ceb79fef03 225
kevman 0:38ceb79fef03 226 if( (*len)-- < 2 || *(*p)++ != 0 )
kevman 0:38ceb79fef03 227 return( MBEDTLS_ERR_ASN1_INVALID_DATA );
kevman 0:38ceb79fef03 228
kevman 0:38ceb79fef03 229 return( 0 );
kevman 0:38ceb79fef03 230 }
kevman 0:38ceb79fef03 231
kevman 0:38ceb79fef03 232
kevman 0:38ceb79fef03 233
kevman 0:38ceb79fef03 234 /*
kevman 0:38ceb79fef03 235 * Parses and splits an ASN.1 "SEQUENCE OF <tag>"
kevman 0:38ceb79fef03 236 */
kevman 0:38ceb79fef03 237 int mbedtls_asn1_get_sequence_of( unsigned char **p,
kevman 0:38ceb79fef03 238 const unsigned char *end,
kevman 0:38ceb79fef03 239 mbedtls_asn1_sequence *cur,
kevman 0:38ceb79fef03 240 int tag)
kevman 0:38ceb79fef03 241 {
kevman 0:38ceb79fef03 242 int ret;
kevman 0:38ceb79fef03 243 size_t len;
kevman 0:38ceb79fef03 244 mbedtls_asn1_buf *buf;
kevman 0:38ceb79fef03 245
kevman 0:38ceb79fef03 246 /* Get main sequence tag */
kevman 0:38ceb79fef03 247 if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
kevman 0:38ceb79fef03 248 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
kevman 0:38ceb79fef03 249 return( ret );
kevman 0:38ceb79fef03 250
kevman 0:38ceb79fef03 251 if( *p + len != end )
kevman 0:38ceb79fef03 252 return( MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
kevman 0:38ceb79fef03 253
kevman 0:38ceb79fef03 254 while( *p < end )
kevman 0:38ceb79fef03 255 {
kevman 0:38ceb79fef03 256 buf = &(cur->buf);
kevman 0:38ceb79fef03 257 buf->tag = **p;
kevman 0:38ceb79fef03 258
kevman 0:38ceb79fef03 259 if( ( ret = mbedtls_asn1_get_tag( p, end, &buf->len, tag ) ) != 0 )
kevman 0:38ceb79fef03 260 return( ret );
kevman 0:38ceb79fef03 261
kevman 0:38ceb79fef03 262 buf->p = *p;
kevman 0:38ceb79fef03 263 *p += buf->len;
kevman 0:38ceb79fef03 264
kevman 0:38ceb79fef03 265 /* Allocate and assign next pointer */
kevman 0:38ceb79fef03 266 if( *p < end )
kevman 0:38ceb79fef03 267 {
kevman 0:38ceb79fef03 268 cur->next = (mbedtls_asn1_sequence*)mbedtls_calloc( 1,
kevman 0:38ceb79fef03 269 sizeof( mbedtls_asn1_sequence ) );
kevman 0:38ceb79fef03 270
kevman 0:38ceb79fef03 271 if( cur->next == NULL )
kevman 0:38ceb79fef03 272 return( MBEDTLS_ERR_ASN1_ALLOC_FAILED );
kevman 0:38ceb79fef03 273
kevman 0:38ceb79fef03 274 cur = cur->next;
kevman 0:38ceb79fef03 275 }
kevman 0:38ceb79fef03 276 }
kevman 0:38ceb79fef03 277
kevman 0:38ceb79fef03 278 /* Set final sequence entry's next pointer to NULL */
kevman 0:38ceb79fef03 279 cur->next = NULL;
kevman 0:38ceb79fef03 280
kevman 0:38ceb79fef03 281 if( *p != end )
kevman 0:38ceb79fef03 282 return( MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
kevman 0:38ceb79fef03 283
kevman 0:38ceb79fef03 284 return( 0 );
kevman 0:38ceb79fef03 285 }
kevman 0:38ceb79fef03 286
kevman 0:38ceb79fef03 287 int mbedtls_asn1_get_alg( unsigned char **p,
kevman 0:38ceb79fef03 288 const unsigned char *end,
kevman 0:38ceb79fef03 289 mbedtls_asn1_buf *alg, mbedtls_asn1_buf *params )
kevman 0:38ceb79fef03 290 {
kevman 0:38ceb79fef03 291 int ret;
kevman 0:38ceb79fef03 292 size_t len;
kevman 0:38ceb79fef03 293
kevman 0:38ceb79fef03 294 if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
kevman 0:38ceb79fef03 295 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
kevman 0:38ceb79fef03 296 return( ret );
kevman 0:38ceb79fef03 297
kevman 0:38ceb79fef03 298 if( ( end - *p ) < 1 )
kevman 0:38ceb79fef03 299 return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
kevman 0:38ceb79fef03 300
kevman 0:38ceb79fef03 301 alg->tag = **p;
kevman 0:38ceb79fef03 302 end = *p + len;
kevman 0:38ceb79fef03 303
kevman 0:38ceb79fef03 304 if( ( ret = mbedtls_asn1_get_tag( p, end, &alg->len, MBEDTLS_ASN1_OID ) ) != 0 )
kevman 0:38ceb79fef03 305 return( ret );
kevman 0:38ceb79fef03 306
kevman 0:38ceb79fef03 307 alg->p = *p;
kevman 0:38ceb79fef03 308 *p += alg->len;
kevman 0:38ceb79fef03 309
kevman 0:38ceb79fef03 310 if( *p == end )
kevman 0:38ceb79fef03 311 {
kevman 0:38ceb79fef03 312 mbedtls_platform_zeroize( params, sizeof(mbedtls_asn1_buf) );
kevman 0:38ceb79fef03 313 return( 0 );
kevman 0:38ceb79fef03 314 }
kevman 0:38ceb79fef03 315
kevman 0:38ceb79fef03 316 params->tag = **p;
kevman 0:38ceb79fef03 317 (*p)++;
kevman 0:38ceb79fef03 318
kevman 0:38ceb79fef03 319 if( ( ret = mbedtls_asn1_get_len( p, end, &params->len ) ) != 0 )
kevman 0:38ceb79fef03 320 return( ret );
kevman 0:38ceb79fef03 321
kevman 0:38ceb79fef03 322 params->p = *p;
kevman 0:38ceb79fef03 323 *p += params->len;
kevman 0:38ceb79fef03 324
kevman 0:38ceb79fef03 325 if( *p != end )
kevman 0:38ceb79fef03 326 return( MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
kevman 0:38ceb79fef03 327
kevman 0:38ceb79fef03 328 return( 0 );
kevman 0:38ceb79fef03 329 }
kevman 0:38ceb79fef03 330
kevman 0:38ceb79fef03 331 int mbedtls_asn1_get_alg_null( unsigned char **p,
kevman 0:38ceb79fef03 332 const unsigned char *end,
kevman 0:38ceb79fef03 333 mbedtls_asn1_buf *alg )
kevman 0:38ceb79fef03 334 {
kevman 0:38ceb79fef03 335 int ret;
kevman 0:38ceb79fef03 336 mbedtls_asn1_buf params;
kevman 0:38ceb79fef03 337
kevman 0:38ceb79fef03 338 memset( &params, 0, sizeof(mbedtls_asn1_buf) );
kevman 0:38ceb79fef03 339
kevman 0:38ceb79fef03 340 if( ( ret = mbedtls_asn1_get_alg( p, end, alg, &params ) ) != 0 )
kevman 0:38ceb79fef03 341 return( ret );
kevman 0:38ceb79fef03 342
kevman 0:38ceb79fef03 343 if( ( params.tag != MBEDTLS_ASN1_NULL && params.tag != 0 ) || params.len != 0 )
kevman 0:38ceb79fef03 344 return( MBEDTLS_ERR_ASN1_INVALID_DATA );
kevman 0:38ceb79fef03 345
kevman 0:38ceb79fef03 346 return( 0 );
kevman 0:38ceb79fef03 347 }
kevman 0:38ceb79fef03 348
kevman 0:38ceb79fef03 349 void mbedtls_asn1_free_named_data( mbedtls_asn1_named_data *cur )
kevman 0:38ceb79fef03 350 {
kevman 0:38ceb79fef03 351 if( cur == NULL )
kevman 0:38ceb79fef03 352 return;
kevman 0:38ceb79fef03 353
kevman 0:38ceb79fef03 354 mbedtls_free( cur->oid.p );
kevman 0:38ceb79fef03 355 mbedtls_free( cur->val.p );
kevman 0:38ceb79fef03 356
kevman 0:38ceb79fef03 357 mbedtls_platform_zeroize( cur, sizeof( mbedtls_asn1_named_data ) );
kevman 0:38ceb79fef03 358 }
kevman 0:38ceb79fef03 359
kevman 0:38ceb79fef03 360 void mbedtls_asn1_free_named_data_list( mbedtls_asn1_named_data **head )
kevman 0:38ceb79fef03 361 {
kevman 0:38ceb79fef03 362 mbedtls_asn1_named_data *cur;
kevman 0:38ceb79fef03 363
kevman 0:38ceb79fef03 364 while( ( cur = *head ) != NULL )
kevman 0:38ceb79fef03 365 {
kevman 0:38ceb79fef03 366 *head = cur->next;
kevman 0:38ceb79fef03 367 mbedtls_asn1_free_named_data( cur );
kevman 0:38ceb79fef03 368 mbedtls_free( cur );
kevman 0:38ceb79fef03 369 }
kevman 0:38ceb79fef03 370 }
kevman 0:38ceb79fef03 371
kevman 0:38ceb79fef03 372 mbedtls_asn1_named_data *mbedtls_asn1_find_named_data( mbedtls_asn1_named_data *list,
kevman 0:38ceb79fef03 373 const char *oid, size_t len )
kevman 0:38ceb79fef03 374 {
kevman 0:38ceb79fef03 375 while( list != NULL )
kevman 0:38ceb79fef03 376 {
kevman 0:38ceb79fef03 377 if( list->oid.len == len &&
kevman 0:38ceb79fef03 378 memcmp( list->oid.p, oid, len ) == 0 )
kevman 0:38ceb79fef03 379 {
kevman 0:38ceb79fef03 380 break;
kevman 0:38ceb79fef03 381 }
kevman 0:38ceb79fef03 382
kevman 0:38ceb79fef03 383 list = list->next;
kevman 0:38ceb79fef03 384 }
kevman 0:38ceb79fef03 385
kevman 0:38ceb79fef03 386 return( list );
kevman 0:38ceb79fef03 387 }
kevman 0:38ceb79fef03 388
kevman 0:38ceb79fef03 389 #endif /* MBEDTLS_ASN1_PARSE_C */