Kenji Arai / mbed-os_TYBLE16

mbed-os5 only for TYBLE16

Dependents:   TYBLE16_simple_data_logger TYBLE16_MP3_Air

features/mbedtls/mbed-crypto/src/asn1parse.c@1:9db0e321a9f4, 2019-12-31 (annotated)

Committer:
kenjiArai
Date:
Tue Dec 31 06:02:27 2019 +0000
Revision:
1:9db0e321a9f4
Parent:
0:5b88d5760320 
updated based on mbed-os5.15.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kenjiArai 0:5b88d5760320 1 /*
kenjiArai 0:5b88d5760320 2 * Generic ASN.1 parsing
kenjiArai 0:5b88d5760320 3 *
kenjiArai 0:5b88d5760320 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
kenjiArai 0:5b88d5760320 5 * SPDX-License-Identifier: Apache-2.0
kenjiArai 0:5b88d5760320 6 *
kenjiArai 0:5b88d5760320 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
kenjiArai 0:5b88d5760320 8 * not use this file except in compliance with the License.
kenjiArai 0:5b88d5760320 9 * You may obtain a copy of the License at
kenjiArai 0:5b88d5760320 10 *
kenjiArai 0:5b88d5760320 11 * http://www.apache.org/licenses/LICENSE-2.0
kenjiArai 0:5b88d5760320 12 *
kenjiArai 0:5b88d5760320 13 * Unless required by applicable law or agreed to in writing, software
kenjiArai 0:5b88d5760320 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
kenjiArai 0:5b88d5760320 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
kenjiArai 0:5b88d5760320 16 * See the License for the specific language governing permissions and
kenjiArai 0:5b88d5760320 17 * limitations under the License.
kenjiArai 0:5b88d5760320 18 *
kenjiArai 0:5b88d5760320 19 * This file is part of mbed TLS (https://tls.mbed.org)
kenjiArai 0:5b88d5760320 20 */
kenjiArai 0:5b88d5760320 21
kenjiArai 0:5b88d5760320 22 #if !defined(MBEDTLS_CONFIG_FILE)
kenjiArai 0:5b88d5760320 23 #include "mbedtls/config.h"
kenjiArai 0:5b88d5760320 24 #else
kenjiArai 0:5b88d5760320 25 #include MBEDTLS_CONFIG_FILE
kenjiArai 0:5b88d5760320 26 #endif
kenjiArai 0:5b88d5760320 27
kenjiArai 0:5b88d5760320 28 #if defined(MBEDTLS_ASN1_PARSE_C)
kenjiArai 0:5b88d5760320 29
kenjiArai 0:5b88d5760320 30 #include "mbedtls/asn1.h"
kenjiArai 0:5b88d5760320 31 #include "mbedtls/platform_util.h"
kenjiArai 0:5b88d5760320 32
kenjiArai 0:5b88d5760320 33 #include <string.h>
kenjiArai 0:5b88d5760320 34
kenjiArai 0:5b88d5760320 35 #if defined(MBEDTLS_BIGNUM_C)
kenjiArai 0:5b88d5760320 36 #include "mbedtls/bignum.h"
kenjiArai 0:5b88d5760320 37 #endif
kenjiArai 0:5b88d5760320 38
kenjiArai 0:5b88d5760320 39 #if defined(MBEDTLS_PLATFORM_C)
kenjiArai 0:5b88d5760320 40 #include "mbedtls/platform.h"
kenjiArai 0:5b88d5760320 41 #else
kenjiArai 0:5b88d5760320 42 #include <stdlib.h>
kenjiArai 0:5b88d5760320 43 #define mbedtls_calloc calloc
kenjiArai 0:5b88d5760320 44 #define mbedtls_free free
kenjiArai 0:5b88d5760320 45 #endif
kenjiArai 0:5b88d5760320 46
kenjiArai 0:5b88d5760320 47 /*
kenjiArai 0:5b88d5760320 48 * ASN.1 DER decoding routines
kenjiArai 0:5b88d5760320 49 */
kenjiArai 0:5b88d5760320 50 int mbedtls_asn1_get_len( unsigned char **p,
kenjiArai 0:5b88d5760320 51 const unsigned char *end,
kenjiArai 0:5b88d5760320 52 size_t *len )
kenjiArai 0:5b88d5760320 53 {
kenjiArai 0:5b88d5760320 54 if( ( end - *p ) < 1 )
kenjiArai 0:5b88d5760320 55 return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
kenjiArai 0:5b88d5760320 56
kenjiArai 0:5b88d5760320 57 if( ( **p & 0x80 ) == 0 )
kenjiArai 0:5b88d5760320 58 *len = *(*p)++;
kenjiArai 0:5b88d5760320 59 else
kenjiArai 0:5b88d5760320 60 {
kenjiArai 0:5b88d5760320 61 switch( **p & 0x7F )
kenjiArai 0:5b88d5760320 62 {
kenjiArai 0:5b88d5760320 63 case 1:
kenjiArai 0:5b88d5760320 64 if( ( end - *p ) < 2 )
kenjiArai 0:5b88d5760320 65 return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
kenjiArai 0:5b88d5760320 66
kenjiArai 0:5b88d5760320 67 *len = (*p)[1];
kenjiArai 0:5b88d5760320 68 (*p) += 2;
kenjiArai 0:5b88d5760320 69 break;
kenjiArai 0:5b88d5760320 70
kenjiArai 0:5b88d5760320 71 case 2:
kenjiArai 0:5b88d5760320 72 if( ( end - *p ) < 3 )
kenjiArai 0:5b88d5760320 73 return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
kenjiArai 0:5b88d5760320 74
kenjiArai 0:5b88d5760320 75 *len = ( (size_t)(*p)[1] << 8 ) | (*p)[2];
kenjiArai 0:5b88d5760320 76 (*p) += 3;
kenjiArai 0:5b88d5760320 77 break;
kenjiArai 0:5b88d5760320 78
kenjiArai 0:5b88d5760320 79 case 3:
kenjiArai 0:5b88d5760320 80 if( ( end - *p ) < 4 )
kenjiArai 0:5b88d5760320 81 return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
kenjiArai 0:5b88d5760320 82
kenjiArai 0:5b88d5760320 83 *len = ( (size_t)(*p)[1] << 16 ) |
kenjiArai 0:5b88d5760320 84 ( (size_t)(*p)[2] << 8 ) | (*p)[3];
kenjiArai 0:5b88d5760320 85 (*p) += 4;
kenjiArai 0:5b88d5760320 86 break;
kenjiArai 0:5b88d5760320 87
kenjiArai 0:5b88d5760320 88 case 4:
kenjiArai 0:5b88d5760320 89 if( ( end - *p ) < 5 )
kenjiArai 0:5b88d5760320 90 return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
kenjiArai 0:5b88d5760320 91
kenjiArai 0:5b88d5760320 92 *len = ( (size_t)(*p)[1] << 24 ) | ( (size_t)(*p)[2] << 16 ) |
kenjiArai 0:5b88d5760320 93 ( (size_t)(*p)[3] << 8 ) | (*p)[4];
kenjiArai 0:5b88d5760320 94 (*p) += 5;
kenjiArai 0:5b88d5760320 95 break;
kenjiArai 0:5b88d5760320 96
kenjiArai 0:5b88d5760320 97 default:
kenjiArai 0:5b88d5760320 98 return( MBEDTLS_ERR_ASN1_INVALID_LENGTH );
kenjiArai 0:5b88d5760320 99 }
kenjiArai 0:5b88d5760320 100 }
kenjiArai 0:5b88d5760320 101
kenjiArai 0:5b88d5760320 102 if( *len > (size_t) ( end - *p ) )
kenjiArai 0:5b88d5760320 103 return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
kenjiArai 0:5b88d5760320 104
kenjiArai 0:5b88d5760320 105 return( 0 );
kenjiArai 0:5b88d5760320 106 }
kenjiArai 0:5b88d5760320 107
kenjiArai 0:5b88d5760320 108 int mbedtls_asn1_get_tag( unsigned char **p,
kenjiArai 0:5b88d5760320 109 const unsigned char *end,
kenjiArai 0:5b88d5760320 110 size_t *len, int tag )
kenjiArai 0:5b88d5760320 111 {
kenjiArai 0:5b88d5760320 112 if( ( end - *p ) < 1 )
kenjiArai 0:5b88d5760320 113 return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
kenjiArai 0:5b88d5760320 114
kenjiArai 0:5b88d5760320 115 if( **p != tag )
kenjiArai 0:5b88d5760320 116 return( MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
kenjiArai 0:5b88d5760320 117
kenjiArai 0:5b88d5760320 118 (*p)++;
kenjiArai 0:5b88d5760320 119
kenjiArai 0:5b88d5760320 120 return( mbedtls_asn1_get_len( p, end, len ) );
kenjiArai 0:5b88d5760320 121 }
kenjiArai 0:5b88d5760320 122
kenjiArai 0:5b88d5760320 123 int mbedtls_asn1_get_bool( unsigned char **p,
kenjiArai 0:5b88d5760320 124 const unsigned char *end,
kenjiArai 0:5b88d5760320 125 int *val )
kenjiArai 0:5b88d5760320 126 {
kenjiArai 0:5b88d5760320 127 int ret;
kenjiArai 0:5b88d5760320 128 size_t len;
kenjiArai 0:5b88d5760320 129
kenjiArai 0:5b88d5760320 130 if( ( ret = mbedtls_asn1_get_tag( p, end, &len, MBEDTLS_ASN1_BOOLEAN ) ) != 0 )
kenjiArai 0:5b88d5760320 131 return( ret );
kenjiArai 0:5b88d5760320 132
kenjiArai 0:5b88d5760320 133 if( len != 1 )
kenjiArai 0:5b88d5760320 134 return( MBEDTLS_ERR_ASN1_INVALID_LENGTH );
kenjiArai 0:5b88d5760320 135
kenjiArai 0:5b88d5760320 136 *val = ( **p != 0 ) ? 1 : 0;
kenjiArai 0:5b88d5760320 137 (*p)++;
kenjiArai 0:5b88d5760320 138
kenjiArai 0:5b88d5760320 139 return( 0 );
kenjiArai 0:5b88d5760320 140 }
kenjiArai 0:5b88d5760320 141
kenjiArai 0:5b88d5760320 142 int mbedtls_asn1_get_int( unsigned char **p,
kenjiArai 0:5b88d5760320 143 const unsigned char *end,
kenjiArai 0:5b88d5760320 144 int *val )
kenjiArai 0:5b88d5760320 145 {
kenjiArai 0:5b88d5760320 146 int ret;
kenjiArai 0:5b88d5760320 147 size_t len;
kenjiArai 0:5b88d5760320 148
kenjiArai 0:5b88d5760320 149 if( ( ret = mbedtls_asn1_get_tag( p, end, &len, MBEDTLS_ASN1_INTEGER ) ) != 0 )
kenjiArai 0:5b88d5760320 150 return( ret );
kenjiArai 0:5b88d5760320 151
kenjiArai 1:9db0e321a9f4 152 /* len==0 is malformed (0 must be represented as 020100). */
kenjiArai 1:9db0e321a9f4 153 if( len == 0 )
kenjiArai 1:9db0e321a9f4 154 return( MBEDTLS_ERR_ASN1_INVALID_LENGTH );
kenjiArai 1:9db0e321a9f4 155 /* This is a cryptography library. Reject negative integers. */
kenjiArai 1:9db0e321a9f4 156 if( ( **p & 0x80 ) != 0 )
kenjiArai 1:9db0e321a9f4 157 return( MBEDTLS_ERR_ASN1_INVALID_LENGTH );
kenjiArai 1:9db0e321a9f4 158
kenjiArai 1:9db0e321a9f4 159 /* Skip leading zeros. */
kenjiArai 1:9db0e321a9f4 160 while( len > 0 && **p == 0 )
kenjiArai 1:9db0e321a9f4 161 {
kenjiArai 1:9db0e321a9f4 162 ++( *p );
kenjiArai 1:9db0e321a9f4 163 --len;
kenjiArai 1:9db0e321a9f4 164 }
kenjiArai 1:9db0e321a9f4 165
kenjiArai 1:9db0e321a9f4 166 /* Reject integers that don't fit in an int. This code assumes that
kenjiArai 1:9db0e321a9f4 167 * the int type has no padding bit. */
kenjiArai 1:9db0e321a9f4 168 if( len > sizeof( int ) )
kenjiArai 1:9db0e321a9f4 169 return( MBEDTLS_ERR_ASN1_INVALID_LENGTH );
kenjiArai 1:9db0e321a9f4 170 if( len == sizeof( int ) && ( **p & 0x80 ) != 0 )
kenjiArai 0:5b88d5760320 171 return( MBEDTLS_ERR_ASN1_INVALID_LENGTH );
kenjiArai 0:5b88d5760320 172
kenjiArai 0:5b88d5760320 173 *val = 0;
kenjiArai 0:5b88d5760320 174 while( len-- > 0 )
kenjiArai 0:5b88d5760320 175 {
kenjiArai 0:5b88d5760320 176 *val = ( *val << 8 ) | **p;
kenjiArai 0:5b88d5760320 177 (*p)++;
kenjiArai 0:5b88d5760320 178 }
kenjiArai 0:5b88d5760320 179
kenjiArai 0:5b88d5760320 180 return( 0 );
kenjiArai 0:5b88d5760320 181 }
kenjiArai 0:5b88d5760320 182
kenjiArai 0:5b88d5760320 183 #if defined(MBEDTLS_BIGNUM_C)
kenjiArai 0:5b88d5760320 184 int mbedtls_asn1_get_mpi( unsigned char **p,
kenjiArai 0:5b88d5760320 185 const unsigned char *end,
kenjiArai 0:5b88d5760320 186 mbedtls_mpi *X )
kenjiArai 0:5b88d5760320 187 {
kenjiArai 0:5b88d5760320 188 int ret;
kenjiArai 0:5b88d5760320 189 size_t len;
kenjiArai 0:5b88d5760320 190
kenjiArai 0:5b88d5760320 191 if( ( ret = mbedtls_asn1_get_tag( p, end, &len, MBEDTLS_ASN1_INTEGER ) ) != 0 )
kenjiArai 0:5b88d5760320 192 return( ret );
kenjiArai 0:5b88d5760320 193
kenjiArai 0:5b88d5760320 194 ret = mbedtls_mpi_read_binary( X, *p, len );
kenjiArai 0:5b88d5760320 195
kenjiArai 0:5b88d5760320 196 *p += len;
kenjiArai 0:5b88d5760320 197
kenjiArai 0:5b88d5760320 198 return( ret );
kenjiArai 0:5b88d5760320 199 }
kenjiArai 0:5b88d5760320 200 #endif /* MBEDTLS_BIGNUM_C */
kenjiArai 0:5b88d5760320 201
kenjiArai 0:5b88d5760320 202 int mbedtls_asn1_get_bitstring( unsigned char **p, const unsigned char *end,
kenjiArai 0:5b88d5760320 203 mbedtls_asn1_bitstring *bs)
kenjiArai 0:5b88d5760320 204 {
kenjiArai 0:5b88d5760320 205 int ret;
kenjiArai 0:5b88d5760320 206
kenjiArai 0:5b88d5760320 207 /* Certificate type is a single byte bitstring */
kenjiArai 0:5b88d5760320 208 if( ( ret = mbedtls_asn1_get_tag( p, end, &bs->len, MBEDTLS_ASN1_BIT_STRING ) ) != 0 )
kenjiArai 0:5b88d5760320 209 return( ret );
kenjiArai 0:5b88d5760320 210
kenjiArai 0:5b88d5760320 211 /* Check length, subtract one for actual bit string length */
kenjiArai 0:5b88d5760320 212 if( bs->len < 1 )
kenjiArai 0:5b88d5760320 213 return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
kenjiArai 0:5b88d5760320 214 bs->len -= 1;
kenjiArai 0:5b88d5760320 215
kenjiArai 0:5b88d5760320 216 /* Get number of unused bits, ensure unused bits <= 7 */
kenjiArai 0:5b88d5760320 217 bs->unused_bits = **p;
kenjiArai 0:5b88d5760320 218 if( bs->unused_bits > 7 )
kenjiArai 0:5b88d5760320 219 return( MBEDTLS_ERR_ASN1_INVALID_LENGTH );
kenjiArai 0:5b88d5760320 220 (*p)++;
kenjiArai 0:5b88d5760320 221
kenjiArai 0:5b88d5760320 222 /* Get actual bitstring */
kenjiArai 0:5b88d5760320 223 bs->p = *p;
kenjiArai 0:5b88d5760320 224 *p += bs->len;
kenjiArai 0:5b88d5760320 225
kenjiArai 0:5b88d5760320 226 if( *p != end )
kenjiArai 0:5b88d5760320 227 return( MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
kenjiArai 0:5b88d5760320 228
kenjiArai 0:5b88d5760320 229 return( 0 );
kenjiArai 0:5b88d5760320 230 }
kenjiArai 0:5b88d5760320 231
kenjiArai 0:5b88d5760320 232 /*
kenjiArai 0:5b88d5760320 233 * Get a bit string without unused bits
kenjiArai 0:5b88d5760320 234 */
kenjiArai 0:5b88d5760320 235 int mbedtls_asn1_get_bitstring_null( unsigned char **p, const unsigned char *end,
kenjiArai 0:5b88d5760320 236 size_t *len )
kenjiArai 0:5b88d5760320 237 {
kenjiArai 0:5b88d5760320 238 int ret;
kenjiArai 0:5b88d5760320 239
kenjiArai 0:5b88d5760320 240 if( ( ret = mbedtls_asn1_get_tag( p, end, len, MBEDTLS_ASN1_BIT_STRING ) ) != 0 )
kenjiArai 0:5b88d5760320 241 return( ret );
kenjiArai 0:5b88d5760320 242
kenjiArai 1:9db0e321a9f4 243 if( *len == 0 )
kenjiArai 0:5b88d5760320 244 return( MBEDTLS_ERR_ASN1_INVALID_DATA );
kenjiArai 1:9db0e321a9f4 245 --( *len );
kenjiArai 1:9db0e321a9f4 246
kenjiArai 1:9db0e321a9f4 247 if( **p != 0 )
kenjiArai 1:9db0e321a9f4 248 return( MBEDTLS_ERR_ASN1_INVALID_DATA );
kenjiArai 1:9db0e321a9f4 249 ++( *p );
kenjiArai 0:5b88d5760320 250
kenjiArai 0:5b88d5760320 251 return( 0 );
kenjiArai 0:5b88d5760320 252 }
kenjiArai 0:5b88d5760320 253
kenjiArai 0:5b88d5760320 254
kenjiArai 0:5b88d5760320 255
kenjiArai 0:5b88d5760320 256 /*
kenjiArai 0:5b88d5760320 257 * Parses and splits an ASN.1 "SEQUENCE OF <tag>"
kenjiArai 0:5b88d5760320 258 */
kenjiArai 0:5b88d5760320 259 int mbedtls_asn1_get_sequence_of( unsigned char **p,
kenjiArai 0:5b88d5760320 260 const unsigned char *end,
kenjiArai 0:5b88d5760320 261 mbedtls_asn1_sequence *cur,
kenjiArai 0:5b88d5760320 262 int tag)
kenjiArai 0:5b88d5760320 263 {
kenjiArai 0:5b88d5760320 264 int ret;
kenjiArai 0:5b88d5760320 265 size_t len;
kenjiArai 0:5b88d5760320 266 mbedtls_asn1_buf *buf;
kenjiArai 0:5b88d5760320 267
kenjiArai 0:5b88d5760320 268 /* Get main sequence tag */
kenjiArai 0:5b88d5760320 269 if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
kenjiArai 0:5b88d5760320 270 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
kenjiArai 0:5b88d5760320 271 return( ret );
kenjiArai 0:5b88d5760320 272
kenjiArai 0:5b88d5760320 273 if( *p + len != end )
kenjiArai 0:5b88d5760320 274 return( MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
kenjiArai 0:5b88d5760320 275
kenjiArai 0:5b88d5760320 276 while( *p < end )
kenjiArai 0:5b88d5760320 277 {
kenjiArai 0:5b88d5760320 278 buf = &(cur->buf);
kenjiArai 0:5b88d5760320 279 buf->tag = **p;
kenjiArai 0:5b88d5760320 280
kenjiArai 0:5b88d5760320 281 if( ( ret = mbedtls_asn1_get_tag( p, end, &buf->len, tag ) ) != 0 )
kenjiArai 0:5b88d5760320 282 return( ret );
kenjiArai 0:5b88d5760320 283
kenjiArai 0:5b88d5760320 284 buf->p = *p;
kenjiArai 0:5b88d5760320 285 *p += buf->len;
kenjiArai 0:5b88d5760320 286
kenjiArai 0:5b88d5760320 287 /* Allocate and assign next pointer */
kenjiArai 0:5b88d5760320 288 if( *p < end )
kenjiArai 0:5b88d5760320 289 {
kenjiArai 0:5b88d5760320 290 cur->next = (mbedtls_asn1_sequence*)mbedtls_calloc( 1,
kenjiArai 0:5b88d5760320 291 sizeof( mbedtls_asn1_sequence ) );
kenjiArai 0:5b88d5760320 292
kenjiArai 0:5b88d5760320 293 if( cur->next == NULL )
kenjiArai 0:5b88d5760320 294 return( MBEDTLS_ERR_ASN1_ALLOC_FAILED );
kenjiArai 0:5b88d5760320 295
kenjiArai 0:5b88d5760320 296 cur = cur->next;
kenjiArai 0:5b88d5760320 297 }
kenjiArai 0:5b88d5760320 298 }
kenjiArai 0:5b88d5760320 299
kenjiArai 0:5b88d5760320 300 /* Set final sequence entry's next pointer to NULL */
kenjiArai 0:5b88d5760320 301 cur->next = NULL;
kenjiArai 0:5b88d5760320 302
kenjiArai 0:5b88d5760320 303 if( *p != end )
kenjiArai 0:5b88d5760320 304 return( MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
kenjiArai 0:5b88d5760320 305
kenjiArai 0:5b88d5760320 306 return( 0 );
kenjiArai 0:5b88d5760320 307 }
kenjiArai 0:5b88d5760320 308
kenjiArai 0:5b88d5760320 309 int mbedtls_asn1_get_alg( unsigned char **p,
kenjiArai 0:5b88d5760320 310 const unsigned char *end,
kenjiArai 0:5b88d5760320 311 mbedtls_asn1_buf *alg, mbedtls_asn1_buf *params )
kenjiArai 0:5b88d5760320 312 {
kenjiArai 0:5b88d5760320 313 int ret;
kenjiArai 0:5b88d5760320 314 size_t len;
kenjiArai 0:5b88d5760320 315
kenjiArai 0:5b88d5760320 316 if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
kenjiArai 0:5b88d5760320 317 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
kenjiArai 0:5b88d5760320 318 return( ret );
kenjiArai 0:5b88d5760320 319
kenjiArai 0:5b88d5760320 320 if( ( end - *p ) < 1 )
kenjiArai 0:5b88d5760320 321 return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
kenjiArai 0:5b88d5760320 322
kenjiArai 0:5b88d5760320 323 alg->tag = **p;
kenjiArai 0:5b88d5760320 324 end = *p + len;
kenjiArai 0:5b88d5760320 325
kenjiArai 0:5b88d5760320 326 if( ( ret = mbedtls_asn1_get_tag( p, end, &alg->len, MBEDTLS_ASN1_OID ) ) != 0 )
kenjiArai 0:5b88d5760320 327 return( ret );
kenjiArai 0:5b88d5760320 328
kenjiArai 0:5b88d5760320 329 alg->p = *p;
kenjiArai 0:5b88d5760320 330 *p += alg->len;
kenjiArai 0:5b88d5760320 331
kenjiArai 0:5b88d5760320 332 if( *p == end )
kenjiArai 0:5b88d5760320 333 {
kenjiArai 0:5b88d5760320 334 mbedtls_platform_zeroize( params, sizeof(mbedtls_asn1_buf) );
kenjiArai 0:5b88d5760320 335 return( 0 );
kenjiArai 0:5b88d5760320 336 }
kenjiArai 0:5b88d5760320 337
kenjiArai 0:5b88d5760320 338 params->tag = **p;
kenjiArai 0:5b88d5760320 339 (*p)++;
kenjiArai 0:5b88d5760320 340
kenjiArai 0:5b88d5760320 341 if( ( ret = mbedtls_asn1_get_len( p, end, &params->len ) ) != 0 )
kenjiArai 0:5b88d5760320 342 return( ret );
kenjiArai 0:5b88d5760320 343
kenjiArai 0:5b88d5760320 344 params->p = *p;
kenjiArai 0:5b88d5760320 345 *p += params->len;
kenjiArai 0:5b88d5760320 346
kenjiArai 0:5b88d5760320 347 if( *p != end )
kenjiArai 0:5b88d5760320 348 return( MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
kenjiArai 0:5b88d5760320 349
kenjiArai 0:5b88d5760320 350 return( 0 );
kenjiArai 0:5b88d5760320 351 }
kenjiArai 0:5b88d5760320 352
kenjiArai 0:5b88d5760320 353 int mbedtls_asn1_get_alg_null( unsigned char **p,
kenjiArai 0:5b88d5760320 354 const unsigned char *end,
kenjiArai 0:5b88d5760320 355 mbedtls_asn1_buf *alg )
kenjiArai 0:5b88d5760320 356 {
kenjiArai 0:5b88d5760320 357 int ret;
kenjiArai 0:5b88d5760320 358 mbedtls_asn1_buf params;
kenjiArai 0:5b88d5760320 359
kenjiArai 0:5b88d5760320 360 memset( &params, 0, sizeof(mbedtls_asn1_buf) );
kenjiArai 0:5b88d5760320 361
kenjiArai 0:5b88d5760320 362 if( ( ret = mbedtls_asn1_get_alg( p, end, alg, &params ) ) != 0 )
kenjiArai 0:5b88d5760320 363 return( ret );
kenjiArai 0:5b88d5760320 364
kenjiArai 0:5b88d5760320 365 if( ( params.tag != MBEDTLS_ASN1_NULL && params.tag != 0 ) || params.len != 0 )
kenjiArai 0:5b88d5760320 366 return( MBEDTLS_ERR_ASN1_INVALID_DATA );
kenjiArai 0:5b88d5760320 367
kenjiArai 0:5b88d5760320 368 return( 0 );
kenjiArai 0:5b88d5760320 369 }
kenjiArai 0:5b88d5760320 370
kenjiArai 0:5b88d5760320 371 void mbedtls_asn1_free_named_data( mbedtls_asn1_named_data *cur )
kenjiArai 0:5b88d5760320 372 {
kenjiArai 0:5b88d5760320 373 if( cur == NULL )
kenjiArai 0:5b88d5760320 374 return;
kenjiArai 0:5b88d5760320 375
kenjiArai 0:5b88d5760320 376 mbedtls_free( cur->oid.p );
kenjiArai 0:5b88d5760320 377 mbedtls_free( cur->val.p );
kenjiArai 0:5b88d5760320 378
kenjiArai 0:5b88d5760320 379 mbedtls_platform_zeroize( cur, sizeof( mbedtls_asn1_named_data ) );
kenjiArai 0:5b88d5760320 380 }
kenjiArai 0:5b88d5760320 381
kenjiArai 0:5b88d5760320 382 void mbedtls_asn1_free_named_data_list( mbedtls_asn1_named_data **head )
kenjiArai 0:5b88d5760320 383 {
kenjiArai 0:5b88d5760320 384 mbedtls_asn1_named_data *cur;
kenjiArai 0:5b88d5760320 385
kenjiArai 0:5b88d5760320 386 while( ( cur = *head ) != NULL )
kenjiArai 0:5b88d5760320 387 {
kenjiArai 0:5b88d5760320 388 *head = cur->next;
kenjiArai 0:5b88d5760320 389 mbedtls_asn1_free_named_data( cur );
kenjiArai 0:5b88d5760320 390 mbedtls_free( cur );
kenjiArai 0:5b88d5760320 391 }
kenjiArai 0:5b88d5760320 392 }
kenjiArai 0:5b88d5760320 393
kenjiArai 0:5b88d5760320 394 mbedtls_asn1_named_data *mbedtls_asn1_find_named_data( mbedtls_asn1_named_data *list,
kenjiArai 0:5b88d5760320 395 const char *oid, size_t len )
kenjiArai 0:5b88d5760320 396 {
kenjiArai 0:5b88d5760320 397 while( list != NULL )
kenjiArai 0:5b88d5760320 398 {
kenjiArai 0:5b88d5760320 399 if( list->oid.len == len &&
kenjiArai 0:5b88d5760320 400 memcmp( list->oid.p, oid, len ) == 0 )
kenjiArai 0:5b88d5760320 401 {
kenjiArai 0:5b88d5760320 402 break;
kenjiArai 0:5b88d5760320 403 }
kenjiArai 0:5b88d5760320 404
kenjiArai 0:5b88d5760320 405 list = list->next;
kenjiArai 0:5b88d5760320 406 }
kenjiArai 0:5b88d5760320 407
kenjiArai 0:5b88d5760320 408 return( list );
kenjiArai 0:5b88d5760320 409 }
kenjiArai 0:5b88d5760320 410
kenjiArai 0:5b88d5760320 411 #endif /* MBEDTLS_ASN1_PARSE_C */