Willie Solano / mbedtls-slave-prot-prod

mbed TLS Build

Dependents:   Slave-prot-prod

include/mbedtls/asn1.h@1:1a219dea6cb5, 2019-06-04 (annotated)

Committer:
williequesada
Date:
Tue Jun 04 16:03:38 2019 +0000
Revision:
1:1a219dea6cb5
Parent:
0:cdf462088d13 
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markrad 0:cdf462088d13 1 /**
markrad 0:cdf462088d13 2 * \file asn1.h
markrad 0:cdf462088d13 3 *
markrad 0:cdf462088d13 4 * \brief Generic ASN.1 parsing
markrad 0:cdf462088d13 5 *
markrad 0:cdf462088d13 6 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
markrad 0:cdf462088d13 7 * SPDX-License-Identifier: Apache-2.0
markrad 0:cdf462088d13 8 *
markrad 0:cdf462088d13 9 * Licensed under the Apache License, Version 2.0 (the "License"); you may
markrad 0:cdf462088d13 10 * not use this file except in compliance with the License.
markrad 0:cdf462088d13 11 * You may obtain a copy of the License at
markrad 0:cdf462088d13 12 *
markrad 0:cdf462088d13 13 * http://www.apache.org/licenses/LICENSE-2.0
markrad 0:cdf462088d13 14 *
markrad 0:cdf462088d13 15 * Unless required by applicable law or agreed to in writing, software
markrad 0:cdf462088d13 16 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
markrad 0:cdf462088d13 17 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
markrad 0:cdf462088d13 18 * See the License for the specific language governing permissions and
markrad 0:cdf462088d13 19 * limitations under the License.
markrad 0:cdf462088d13 20 *
markrad 0:cdf462088d13 21 * This file is part of mbed TLS (https://tls.mbed.org)
markrad 0:cdf462088d13 22 */
markrad 0:cdf462088d13 23 #ifndef MBEDTLS_ASN1_H
markrad 0:cdf462088d13 24 #define MBEDTLS_ASN1_H
markrad 0:cdf462088d13 25
markrad 0:cdf462088d13 26 #if !defined(MBEDTLS_CONFIG_FILE)
markrad 0:cdf462088d13 27 #include "config.h"
markrad 0:cdf462088d13 28 #else
markrad 0:cdf462088d13 29 #include MBEDTLS_CONFIG_FILE
markrad 0:cdf462088d13 30 #endif
markrad 0:cdf462088d13 31
markrad 0:cdf462088d13 32 #include <stddef.h>
markrad 0:cdf462088d13 33
markrad 0:cdf462088d13 34 #if defined(MBEDTLS_BIGNUM_C)
markrad 0:cdf462088d13 35 #include "bignum.h"
markrad 0:cdf462088d13 36 #endif
markrad 0:cdf462088d13 37
markrad 0:cdf462088d13 38 /**
markrad 0:cdf462088d13 39 * \addtogroup asn1_module
markrad 0:cdf462088d13 40 * \{
markrad 0:cdf462088d13 41 */
markrad 0:cdf462088d13 42
markrad 0:cdf462088d13 43 /**
markrad 0:cdf462088d13 44 * \name ASN1 Error codes
markrad 0:cdf462088d13 45 * These error codes are OR'ed to X509 error codes for
markrad 0:cdf462088d13 46 * higher error granularity.
markrad 0:cdf462088d13 47 * ASN1 is a standard to specify data structures.
markrad 0:cdf462088d13 48 * \{
markrad 0:cdf462088d13 49 */
markrad 0:cdf462088d13 50 #define MBEDTLS_ERR_ASN1_OUT_OF_DATA -0x0060 /**< Out of data when parsing an ASN1 data structure. */
markrad 0:cdf462088d13 51 #define MBEDTLS_ERR_ASN1_UNEXPECTED_TAG -0x0062 /**< ASN1 tag was of an unexpected value. */
markrad 0:cdf462088d13 52 #define MBEDTLS_ERR_ASN1_INVALID_LENGTH -0x0064 /**< Error when trying to determine the length or invalid length. */
markrad 0:cdf462088d13 53 #define MBEDTLS_ERR_ASN1_LENGTH_MISMATCH -0x0066 /**< Actual length differs from expected length. */
markrad 0:cdf462088d13 54 #define MBEDTLS_ERR_ASN1_INVALID_DATA -0x0068 /**< Data is invalid. (not used) */
markrad 0:cdf462088d13 55 #define MBEDTLS_ERR_ASN1_ALLOC_FAILED -0x006A /**< Memory allocation failed */
markrad 0:cdf462088d13 56 #define MBEDTLS_ERR_ASN1_BUF_TOO_SMALL -0x006C /**< Buffer too small when writing ASN.1 data structure. */
markrad 0:cdf462088d13 57
markrad 0:cdf462088d13 58 /* \} name */
markrad 0:cdf462088d13 59
markrad 0:cdf462088d13 60 /**
markrad 0:cdf462088d13 61 * \name DER constants
markrad 0:cdf462088d13 62 * These constants comply with DER encoded the ANS1 type tags.
markrad 0:cdf462088d13 63 * DER encoding uses hexadecimal representation.
markrad 0:cdf462088d13 64 * An example DER sequence is:\n
markrad 0:cdf462088d13 65 * - 0x02 -- tag indicating INTEGER
markrad 0:cdf462088d13 66 * - 0x01 -- length in octets
markrad 0:cdf462088d13 67 * - 0x05 -- value
markrad 0:cdf462088d13 68 * Such sequences are typically read into \c ::mbedtls_x509_buf.
markrad 0:cdf462088d13 69 * \{
markrad 0:cdf462088d13 70 */
markrad 0:cdf462088d13 71 #define MBEDTLS_ASN1_BOOLEAN 0x01
markrad 0:cdf462088d13 72 #define MBEDTLS_ASN1_INTEGER 0x02
markrad 0:cdf462088d13 73 #define MBEDTLS_ASN1_BIT_STRING 0x03
markrad 0:cdf462088d13 74 #define MBEDTLS_ASN1_OCTET_STRING 0x04
markrad 0:cdf462088d13 75 #define MBEDTLS_ASN1_NULL 0x05
markrad 0:cdf462088d13 76 #define MBEDTLS_ASN1_OID 0x06
markrad 0:cdf462088d13 77 #define MBEDTLS_ASN1_UTF8_STRING 0x0C
markrad 0:cdf462088d13 78 #define MBEDTLS_ASN1_SEQUENCE 0x10
markrad 0:cdf462088d13 79 #define MBEDTLS_ASN1_SET 0x11
markrad 0:cdf462088d13 80 #define MBEDTLS_ASN1_PRINTABLE_STRING 0x13
markrad 0:cdf462088d13 81 #define MBEDTLS_ASN1_T61_STRING 0x14
markrad 0:cdf462088d13 82 #define MBEDTLS_ASN1_IA5_STRING 0x16
markrad 0:cdf462088d13 83 #define MBEDTLS_ASN1_UTC_TIME 0x17
markrad 0:cdf462088d13 84 #define MBEDTLS_ASN1_GENERALIZED_TIME 0x18
markrad 0:cdf462088d13 85 #define MBEDTLS_ASN1_UNIVERSAL_STRING 0x1C
markrad 0:cdf462088d13 86 #define MBEDTLS_ASN1_BMP_STRING 0x1E
markrad 0:cdf462088d13 87 #define MBEDTLS_ASN1_PRIMITIVE 0x00
markrad 0:cdf462088d13 88 #define MBEDTLS_ASN1_CONSTRUCTED 0x20
markrad 0:cdf462088d13 89 #define MBEDTLS_ASN1_CONTEXT_SPECIFIC 0x80
markrad 0:cdf462088d13 90 /* \} name */
markrad 0:cdf462088d13 91 /* \} addtogroup asn1_module */
markrad 0:cdf462088d13 92
markrad 0:cdf462088d13 93 /** Returns the size of the binary string, without the trailing \\0 */
markrad 0:cdf462088d13 94 #define MBEDTLS_OID_SIZE(x) (sizeof(x) - 1)
markrad 0:cdf462088d13 95
markrad 0:cdf462088d13 96 /**
markrad 0:cdf462088d13 97 * Compares an mbedtls_asn1_buf structure to a reference OID.
markrad 0:cdf462088d13 98 *
markrad 0:cdf462088d13 99 * Only works for 'defined' oid_str values (MBEDTLS_OID_HMAC_SHA1), you cannot use a
markrad 0:cdf462088d13 100 * 'unsigned char *oid' here!
markrad 0:cdf462088d13 101 */
markrad 0:cdf462088d13 102 #define MBEDTLS_OID_CMP(oid_str, oid_buf) \
markrad 0:cdf462088d13 103 ( ( MBEDTLS_OID_SIZE(oid_str) != (oid_buf)->len ) || \
markrad 0:cdf462088d13 104 memcmp( (oid_str), (oid_buf)->p, (oid_buf)->len) != 0 )
markrad 0:cdf462088d13 105
markrad 0:cdf462088d13 106 #ifdef __cplusplus
markrad 0:cdf462088d13 107 extern "C" {
markrad 0:cdf462088d13 108 #endif
markrad 0:cdf462088d13 109
markrad 0:cdf462088d13 110 /**
markrad 0:cdf462088d13 111 * \name Functions to parse ASN.1 data structures
markrad 0:cdf462088d13 112 * \{
markrad 0:cdf462088d13 113 */
markrad 0:cdf462088d13 114
markrad 0:cdf462088d13 115 /**
markrad 0:cdf462088d13 116 * Type-length-value structure that allows for ASN1 using DER.
markrad 0:cdf462088d13 117 */
markrad 0:cdf462088d13 118 typedef struct mbedtls_asn1_buf
markrad 0:cdf462088d13 119 {
markrad 0:cdf462088d13 120 int tag; /**< ASN1 type, e.g. MBEDTLS_ASN1_UTF8_STRING. */
markrad 0:cdf462088d13 121 size_t len; /**< ASN1 length, in octets. */
markrad 0:cdf462088d13 122 unsigned char *p; /**< ASN1 data, e.g. in ASCII. */
markrad 0:cdf462088d13 123 }
markrad 0:cdf462088d13 124 mbedtls_asn1_buf;
markrad 0:cdf462088d13 125
markrad 0:cdf462088d13 126 /**
markrad 0:cdf462088d13 127 * Container for ASN1 bit strings.
markrad 0:cdf462088d13 128 */
markrad 0:cdf462088d13 129 typedef struct mbedtls_asn1_bitstring
markrad 0:cdf462088d13 130 {
markrad 0:cdf462088d13 131 size_t len; /**< ASN1 length, in octets. */
markrad 0:cdf462088d13 132 unsigned char unused_bits; /**< Number of unused bits at the end of the string */
markrad 0:cdf462088d13 133 unsigned char *p; /**< Raw ASN1 data for the bit string */
markrad 0:cdf462088d13 134 }
markrad 0:cdf462088d13 135 mbedtls_asn1_bitstring;
markrad 0:cdf462088d13 136
markrad 0:cdf462088d13 137 /**
markrad 0:cdf462088d13 138 * Container for a sequence of ASN.1 items
markrad 0:cdf462088d13 139 */
markrad 0:cdf462088d13 140 typedef struct mbedtls_asn1_sequence
markrad 0:cdf462088d13 141 {
markrad 0:cdf462088d13 142 mbedtls_asn1_buf buf; /**< Buffer containing the given ASN.1 item. */
markrad 0:cdf462088d13 143 struct mbedtls_asn1_sequence *next; /**< The next entry in the sequence. */
markrad 0:cdf462088d13 144 }
markrad 0:cdf462088d13 145 mbedtls_asn1_sequence;
markrad 0:cdf462088d13 146
markrad 0:cdf462088d13 147 /**
markrad 0:cdf462088d13 148 * Container for a sequence or list of 'named' ASN.1 data items
markrad 0:cdf462088d13 149 */
markrad 0:cdf462088d13 150 typedef struct mbedtls_asn1_named_data
markrad 0:cdf462088d13 151 {
markrad 0:cdf462088d13 152 mbedtls_asn1_buf oid; /**< The object identifier. */
markrad 0:cdf462088d13 153 mbedtls_asn1_buf val; /**< The named value. */
markrad 0:cdf462088d13 154 struct mbedtls_asn1_named_data *next; /**< The next entry in the sequence. */
markrad 0:cdf462088d13 155 unsigned char next_merged; /**< Merge next item into the current one? */
markrad 0:cdf462088d13 156 }
markrad 0:cdf462088d13 157 mbedtls_asn1_named_data;
markrad 0:cdf462088d13 158
markrad 0:cdf462088d13 159 /**
markrad 0:cdf462088d13 160 * \brief Get the length of an ASN.1 element.
markrad 0:cdf462088d13 161 * Updates the pointer to immediately behind the length.
markrad 0:cdf462088d13 162 *
markrad 0:cdf462088d13 163 * \param p The position in the ASN.1 data
markrad 0:cdf462088d13 164 * \param end End of data
markrad 0:cdf462088d13 165 * \param len The variable that will receive the value
markrad 0:cdf462088d13 166 *
markrad 0:cdf462088d13 167 * \return 0 if successful, MBEDTLS_ERR_ASN1_OUT_OF_DATA on reaching
markrad 0:cdf462088d13 168 * end of data, MBEDTLS_ERR_ASN1_INVALID_LENGTH if length is
markrad 0:cdf462088d13 169 * unparseable.
markrad 0:cdf462088d13 170 */
markrad 0:cdf462088d13 171 int mbedtls_asn1_get_len( unsigned char **p,
markrad 0:cdf462088d13 172 const unsigned char *end,
markrad 0:cdf462088d13 173 size_t *len );
markrad 0:cdf462088d13 174
markrad 0:cdf462088d13 175 /**
markrad 0:cdf462088d13 176 * \brief Get the tag and length of the tag. Check for the requested tag.
markrad 0:cdf462088d13 177 * Updates the pointer to immediately behind the tag and length.
markrad 0:cdf462088d13 178 *
markrad 0:cdf462088d13 179 * \param p The position in the ASN.1 data
markrad 0:cdf462088d13 180 * \param end End of data
markrad 0:cdf462088d13 181 * \param len The variable that will receive the length
markrad 0:cdf462088d13 182 * \param tag The expected tag
markrad 0:cdf462088d13 183 *
markrad 0:cdf462088d13 184 * \return 0 if successful, MBEDTLS_ERR_ASN1_UNEXPECTED_TAG if tag did
markrad 0:cdf462088d13 185 * not match requested tag, or another specific ASN.1 error code.
markrad 0:cdf462088d13 186 */
markrad 0:cdf462088d13 187 int mbedtls_asn1_get_tag( unsigned char **p,
markrad 0:cdf462088d13 188 const unsigned char *end,
markrad 0:cdf462088d13 189 size_t *len, int tag );
markrad 0:cdf462088d13 190
markrad 0:cdf462088d13 191 /**
markrad 0:cdf462088d13 192 * \brief Retrieve a boolean ASN.1 tag and its value.
markrad 0:cdf462088d13 193 * Updates the pointer to immediately behind the full tag.
markrad 0:cdf462088d13 194 *
markrad 0:cdf462088d13 195 * \param p The position in the ASN.1 data
markrad 0:cdf462088d13 196 * \param end End of data
markrad 0:cdf462088d13 197 * \param val The variable that will receive the value
markrad 0:cdf462088d13 198 *
markrad 0:cdf462088d13 199 * \return 0 if successful or a specific ASN.1 error code.
markrad 0:cdf462088d13 200 */
markrad 0:cdf462088d13 201 int mbedtls_asn1_get_bool( unsigned char **p,
markrad 0:cdf462088d13 202 const unsigned char *end,
markrad 0:cdf462088d13 203 int *val );
markrad 0:cdf462088d13 204
markrad 0:cdf462088d13 205 /**
markrad 0:cdf462088d13 206 * \brief Retrieve an integer ASN.1 tag and its value.
markrad 0:cdf462088d13 207 * Updates the pointer to immediately behind the full tag.
markrad 0:cdf462088d13 208 *
markrad 0:cdf462088d13 209 * \param p The position in the ASN.1 data
markrad 0:cdf462088d13 210 * \param end End of data
markrad 0:cdf462088d13 211 * \param val The variable that will receive the value
markrad 0:cdf462088d13 212 *
markrad 0:cdf462088d13 213 * \return 0 if successful or a specific ASN.1 error code.
markrad 0:cdf462088d13 214 */
markrad 0:cdf462088d13 215 int mbedtls_asn1_get_int( unsigned char **p,
markrad 0:cdf462088d13 216 const unsigned char *end,
markrad 0:cdf462088d13 217 int *val );
markrad 0:cdf462088d13 218
markrad 0:cdf462088d13 219 /**
markrad 0:cdf462088d13 220 * \brief Retrieve a bitstring ASN.1 tag and its value.
markrad 0:cdf462088d13 221 * Updates the pointer to immediately behind the full tag.
markrad 0:cdf462088d13 222 *
markrad 0:cdf462088d13 223 * \param p The position in the ASN.1 data
markrad 0:cdf462088d13 224 * \param end End of data
markrad 0:cdf462088d13 225 * \param bs The variable that will receive the value
markrad 0:cdf462088d13 226 *
markrad 0:cdf462088d13 227 * \return 0 if successful or a specific ASN.1 error code.
markrad 0:cdf462088d13 228 */
markrad 0:cdf462088d13 229 int mbedtls_asn1_get_bitstring( unsigned char **p, const unsigned char *end,
markrad 0:cdf462088d13 230 mbedtls_asn1_bitstring *bs);
markrad 0:cdf462088d13 231
markrad 0:cdf462088d13 232 /**
markrad 0:cdf462088d13 233 * \brief Retrieve a bitstring ASN.1 tag without unused bits and its
markrad 0:cdf462088d13 234 * value.
markrad 0:cdf462088d13 235 * Updates the pointer to the beginning of the bit/octet string.
markrad 0:cdf462088d13 236 *
markrad 0:cdf462088d13 237 * \param p The position in the ASN.1 data
markrad 0:cdf462088d13 238 * \param end End of data
markrad 0:cdf462088d13 239 * \param len Length of the actual bit/octect string in bytes
markrad 0:cdf462088d13 240 *
markrad 0:cdf462088d13 241 * \return 0 if successful or a specific ASN.1 error code.
markrad 0:cdf462088d13 242 */
markrad 0:cdf462088d13 243 int mbedtls_asn1_get_bitstring_null( unsigned char **p, const unsigned char *end,
markrad 0:cdf462088d13 244 size_t *len );
markrad 0:cdf462088d13 245
markrad 0:cdf462088d13 246 /**
markrad 0:cdf462088d13 247 * \brief Parses and splits an ASN.1 "SEQUENCE OF <tag>"
markrad 0:cdf462088d13 248 * Updated the pointer to immediately behind the full sequence tag.
markrad 0:cdf462088d13 249 *
markrad 0:cdf462088d13 250 * \param p The position in the ASN.1 data
markrad 0:cdf462088d13 251 * \param end End of data
markrad 0:cdf462088d13 252 * \param cur First variable in the chain to fill
markrad 0:cdf462088d13 253 * \param tag Type of sequence
markrad 0:cdf462088d13 254 *
markrad 0:cdf462088d13 255 * \return 0 if successful or a specific ASN.1 error code.
markrad 0:cdf462088d13 256 */
markrad 0:cdf462088d13 257 int mbedtls_asn1_get_sequence_of( unsigned char **p,
markrad 0:cdf462088d13 258 const unsigned char *end,
markrad 0:cdf462088d13 259 mbedtls_asn1_sequence *cur,
markrad 0:cdf462088d13 260 int tag);
markrad 0:cdf462088d13 261
markrad 0:cdf462088d13 262 #if defined(MBEDTLS_BIGNUM_C)
markrad 0:cdf462088d13 263 /**
markrad 0:cdf462088d13 264 * \brief Retrieve a MPI value from an integer ASN.1 tag.
markrad 0:cdf462088d13 265 * Updates the pointer to immediately behind the full tag.
markrad 0:cdf462088d13 266 *
markrad 0:cdf462088d13 267 * \param p The position in the ASN.1 data
markrad 0:cdf462088d13 268 * \param end End of data
markrad 0:cdf462088d13 269 * \param X The MPI that will receive the value
markrad 0:cdf462088d13 270 *
markrad 0:cdf462088d13 271 * \return 0 if successful or a specific ASN.1 or MPI error code.
markrad 0:cdf462088d13 272 */
markrad 0:cdf462088d13 273 int mbedtls_asn1_get_mpi( unsigned char **p,
markrad 0:cdf462088d13 274 const unsigned char *end,
markrad 0:cdf462088d13 275 mbedtls_mpi *X );
markrad 0:cdf462088d13 276 #endif /* MBEDTLS_BIGNUM_C */
markrad 0:cdf462088d13 277
markrad 0:cdf462088d13 278 /**
markrad 0:cdf462088d13 279 * \brief Retrieve an AlgorithmIdentifier ASN.1 sequence.
markrad 0:cdf462088d13 280 * Updates the pointer to immediately behind the full
markrad 0:cdf462088d13 281 * AlgorithmIdentifier.
markrad 0:cdf462088d13 282 *
markrad 0:cdf462088d13 283 * \param p The position in the ASN.1 data
markrad 0:cdf462088d13 284 * \param end End of data
markrad 0:cdf462088d13 285 * \param alg The buffer to receive the OID
markrad 0:cdf462088d13 286 * \param params The buffer to receive the params (if any)
markrad 0:cdf462088d13 287 *
markrad 0:cdf462088d13 288 * \return 0 if successful or a specific ASN.1 or MPI error code.
markrad 0:cdf462088d13 289 */
markrad 0:cdf462088d13 290 int mbedtls_asn1_get_alg( unsigned char **p,
markrad 0:cdf462088d13 291 const unsigned char *end,
markrad 0:cdf462088d13 292 mbedtls_asn1_buf *alg, mbedtls_asn1_buf *params );
markrad 0:cdf462088d13 293
markrad 0:cdf462088d13 294 /**
markrad 0:cdf462088d13 295 * \brief Retrieve an AlgorithmIdentifier ASN.1 sequence with NULL or no
markrad 0:cdf462088d13 296 * params.
markrad 0:cdf462088d13 297 * Updates the pointer to immediately behind the full
markrad 0:cdf462088d13 298 * AlgorithmIdentifier.
markrad 0:cdf462088d13 299 *
markrad 0:cdf462088d13 300 * \param p The position in the ASN.1 data
markrad 0:cdf462088d13 301 * \param end End of data
markrad 0:cdf462088d13 302 * \param alg The buffer to receive the OID
markrad 0:cdf462088d13 303 *
markrad 0:cdf462088d13 304 * \return 0 if successful or a specific ASN.1 or MPI error code.
markrad 0:cdf462088d13 305 */
markrad 0:cdf462088d13 306 int mbedtls_asn1_get_alg_null( unsigned char **p,
markrad 0:cdf462088d13 307 const unsigned char *end,
markrad 0:cdf462088d13 308 mbedtls_asn1_buf *alg );
markrad 0:cdf462088d13 309
markrad 0:cdf462088d13 310 /**
markrad 0:cdf462088d13 311 * \brief Find a specific named_data entry in a sequence or list based on
markrad 0:cdf462088d13 312 * the OID.
markrad 0:cdf462088d13 313 *
markrad 0:cdf462088d13 314 * \param list The list to seek through
markrad 0:cdf462088d13 315 * \param oid The OID to look for
markrad 0:cdf462088d13 316 * \param len Size of the OID
markrad 0:cdf462088d13 317 *
markrad 0:cdf462088d13 318 * \return NULL if not found, or a pointer to the existing entry.
markrad 0:cdf462088d13 319 */
markrad 0:cdf462088d13 320 mbedtls_asn1_named_data *mbedtls_asn1_find_named_data( mbedtls_asn1_named_data *list,
markrad 0:cdf462088d13 321 const char *oid, size_t len );
markrad 0:cdf462088d13 322
markrad 0:cdf462088d13 323 /**
markrad 0:cdf462088d13 324 * \brief Free a mbedtls_asn1_named_data entry
markrad 0:cdf462088d13 325 *
markrad 0:cdf462088d13 326 * \param entry The named data entry to free
markrad 0:cdf462088d13 327 */
markrad 0:cdf462088d13 328 void mbedtls_asn1_free_named_data( mbedtls_asn1_named_data *entry );
markrad 0:cdf462088d13 329
markrad 0:cdf462088d13 330 /**
markrad 0:cdf462088d13 331 * \brief Free all entries in a mbedtls_asn1_named_data list
markrad 0:cdf462088d13 332 * Head will be set to NULL
markrad 0:cdf462088d13 333 *
markrad 0:cdf462088d13 334 * \param head Pointer to the head of the list of named data entries to free
markrad 0:cdf462088d13 335 */
markrad 0:cdf462088d13 336 void mbedtls_asn1_free_named_data_list( mbedtls_asn1_named_data **head );
markrad 0:cdf462088d13 337
markrad 0:cdf462088d13 338 #ifdef __cplusplus
markrad 0:cdf462088d13 339 }
markrad 0:cdf462088d13 340 #endif
markrad 0:cdf462088d13 341
markrad 0:cdf462088d13 342 #endif /* asn1.h */