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include/mbedtls/md.h@0:cdf462088d13, 2017-01-05 (annotated)

Committer:
markrad
Date:
Thu Jan 05 00:18:44 2017 +0000
Revision:
0:cdf462088d13
Initial commit

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markrad 0:cdf462088d13 1 /**
markrad 0:cdf462088d13 2 * \file md.h
markrad 0:cdf462088d13 3 *
markrad 0:cdf462088d13 4 * \brief Generic message digest wrapper
markrad 0:cdf462088d13 5 *
markrad 0:cdf462088d13 6 * \author Adriaan de Jong <dejong@fox-it.com>
markrad 0:cdf462088d13 7 *
markrad 0:cdf462088d13 8 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
markrad 0:cdf462088d13 9 * SPDX-License-Identifier: Apache-2.0
markrad 0:cdf462088d13 10 *
markrad 0:cdf462088d13 11 * Licensed under the Apache License, Version 2.0 (the "License"); you may
markrad 0:cdf462088d13 12 * not use this file except in compliance with the License.
markrad 0:cdf462088d13 13 * You may obtain a copy of the License at
markrad 0:cdf462088d13 14 *
markrad 0:cdf462088d13 15 * http://www.apache.org/licenses/LICENSE-2.0
markrad 0:cdf462088d13 16 *
markrad 0:cdf462088d13 17 * Unless required by applicable law or agreed to in writing, software
markrad 0:cdf462088d13 18 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
markrad 0:cdf462088d13 19 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
markrad 0:cdf462088d13 20 * See the License for the specific language governing permissions and
markrad 0:cdf462088d13 21 * limitations under the License.
markrad 0:cdf462088d13 22 *
markrad 0:cdf462088d13 23 * This file is part of mbed TLS (https://tls.mbed.org)
markrad 0:cdf462088d13 24 */
markrad 0:cdf462088d13 25 #ifndef MBEDTLS_MD_H
markrad 0:cdf462088d13 26 #define MBEDTLS_MD_H
markrad 0:cdf462088d13 27
markrad 0:cdf462088d13 28 #include <stddef.h>
markrad 0:cdf462088d13 29
markrad 0:cdf462088d13 30 #define MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE -0x5080 /**< The selected feature is not available. */
markrad 0:cdf462088d13 31 #define MBEDTLS_ERR_MD_BAD_INPUT_DATA -0x5100 /**< Bad input parameters to function. */
markrad 0:cdf462088d13 32 #define MBEDTLS_ERR_MD_ALLOC_FAILED -0x5180 /**< Failed to allocate memory. */
markrad 0:cdf462088d13 33 #define MBEDTLS_ERR_MD_FILE_IO_ERROR -0x5200 /**< Opening or reading of file failed. */
markrad 0:cdf462088d13 34
markrad 0:cdf462088d13 35 #ifdef __cplusplus
markrad 0:cdf462088d13 36 extern "C" {
markrad 0:cdf462088d13 37 #endif
markrad 0:cdf462088d13 38
markrad 0:cdf462088d13 39 typedef enum {
markrad 0:cdf462088d13 40 MBEDTLS_MD_NONE=0,
markrad 0:cdf462088d13 41 MBEDTLS_MD_MD2,
markrad 0:cdf462088d13 42 MBEDTLS_MD_MD4,
markrad 0:cdf462088d13 43 MBEDTLS_MD_MD5,
markrad 0:cdf462088d13 44 MBEDTLS_MD_SHA1,
markrad 0:cdf462088d13 45 MBEDTLS_MD_SHA224,
markrad 0:cdf462088d13 46 MBEDTLS_MD_SHA256,
markrad 0:cdf462088d13 47 MBEDTLS_MD_SHA384,
markrad 0:cdf462088d13 48 MBEDTLS_MD_SHA512,
markrad 0:cdf462088d13 49 MBEDTLS_MD_RIPEMD160,
markrad 0:cdf462088d13 50 } mbedtls_md_type_t;
markrad 0:cdf462088d13 51
markrad 0:cdf462088d13 52 #if defined(MBEDTLS_SHA512_C)
markrad 0:cdf462088d13 53 #define MBEDTLS_MD_MAX_SIZE 64 /* longest known is SHA512 */
markrad 0:cdf462088d13 54 #else
markrad 0:cdf462088d13 55 #define MBEDTLS_MD_MAX_SIZE 32 /* longest known is SHA256 or less */
markrad 0:cdf462088d13 56 #endif
markrad 0:cdf462088d13 57
markrad 0:cdf462088d13 58 /**
markrad 0:cdf462088d13 59 * Opaque struct defined in md_internal.h
markrad 0:cdf462088d13 60 */
markrad 0:cdf462088d13 61 typedef struct mbedtls_md_info_t mbedtls_md_info_t;
markrad 0:cdf462088d13 62
markrad 0:cdf462088d13 63 /**
markrad 0:cdf462088d13 64 * Generic message digest context.
markrad 0:cdf462088d13 65 */
markrad 0:cdf462088d13 66 typedef struct {
markrad 0:cdf462088d13 67 /** Information about the associated message digest */
markrad 0:cdf462088d13 68 const mbedtls_md_info_t *md_info;
markrad 0:cdf462088d13 69
markrad 0:cdf462088d13 70 /** Digest-specific context */
markrad 0:cdf462088d13 71 void *md_ctx;
markrad 0:cdf462088d13 72
markrad 0:cdf462088d13 73 /** HMAC part of the context */
markrad 0:cdf462088d13 74 void *hmac_ctx;
markrad 0:cdf462088d13 75 } mbedtls_md_context_t;
markrad 0:cdf462088d13 76
markrad 0:cdf462088d13 77 /**
markrad 0:cdf462088d13 78 * \brief Returns the list of digests supported by the generic digest module.
markrad 0:cdf462088d13 79 *
markrad 0:cdf462088d13 80 * \return a statically allocated array of digests, the last entry
markrad 0:cdf462088d13 81 * is 0.
markrad 0:cdf462088d13 82 */
markrad 0:cdf462088d13 83 const int *mbedtls_md_list( void );
markrad 0:cdf462088d13 84
markrad 0:cdf462088d13 85 /**
markrad 0:cdf462088d13 86 * \brief Returns the message digest information associated with the
markrad 0:cdf462088d13 87 * given digest name.
markrad 0:cdf462088d13 88 *
markrad 0:cdf462088d13 89 * \param md_name Name of the digest to search for.
markrad 0:cdf462088d13 90 *
markrad 0:cdf462088d13 91 * \return The message digest information associated with md_name or
markrad 0:cdf462088d13 92 * NULL if not found.
markrad 0:cdf462088d13 93 */
markrad 0:cdf462088d13 94 const mbedtls_md_info_t *mbedtls_md_info_from_string( const char *md_name );
markrad 0:cdf462088d13 95
markrad 0:cdf462088d13 96 /**
markrad 0:cdf462088d13 97 * \brief Returns the message digest information associated with the
markrad 0:cdf462088d13 98 * given digest type.
markrad 0:cdf462088d13 99 *
markrad 0:cdf462088d13 100 * \param md_type type of digest to search for.
markrad 0:cdf462088d13 101 *
markrad 0:cdf462088d13 102 * \return The message digest information associated with md_type or
markrad 0:cdf462088d13 103 * NULL if not found.
markrad 0:cdf462088d13 104 */
markrad 0:cdf462088d13 105 const mbedtls_md_info_t *mbedtls_md_info_from_type( mbedtls_md_type_t md_type );
markrad 0:cdf462088d13 106
markrad 0:cdf462088d13 107 /**
markrad 0:cdf462088d13 108 * \brief Initialize a md_context (as NONE)
markrad 0:cdf462088d13 109 * This should always be called first.
markrad 0:cdf462088d13 110 * Prepares the context for mbedtls_md_setup() or mbedtls_md_free().
markrad 0:cdf462088d13 111 */
markrad 0:cdf462088d13 112 void mbedtls_md_init( mbedtls_md_context_t *ctx );
markrad 0:cdf462088d13 113
markrad 0:cdf462088d13 114 /**
markrad 0:cdf462088d13 115 * \brief Free and clear the internal structures of ctx.
markrad 0:cdf462088d13 116 * Can be called at any time after mbedtls_md_init().
markrad 0:cdf462088d13 117 * Mandatory once mbedtls_md_setup() has been called.
markrad 0:cdf462088d13 118 */
markrad 0:cdf462088d13 119 void mbedtls_md_free( mbedtls_md_context_t *ctx );
markrad 0:cdf462088d13 120
markrad 0:cdf462088d13 121 #if ! defined(MBEDTLS_DEPRECATED_REMOVED)
markrad 0:cdf462088d13 122 #if defined(MBEDTLS_DEPRECATED_WARNING)
markrad 0:cdf462088d13 123 #define MBEDTLS_DEPRECATED __attribute__((deprecated))
markrad 0:cdf462088d13 124 #else
markrad 0:cdf462088d13 125 #define MBEDTLS_DEPRECATED
markrad 0:cdf462088d13 126 #endif
markrad 0:cdf462088d13 127 /**
markrad 0:cdf462088d13 128 * \brief Select MD to use and allocate internal structures.
markrad 0:cdf462088d13 129 * Should be called after mbedtls_md_init() or mbedtls_md_free().
markrad 0:cdf462088d13 130 * Makes it necessary to call mbedtls_md_free() later.
markrad 0:cdf462088d13 131 *
markrad 0:cdf462088d13 132 * \deprecated Superseded by mbedtls_md_setup() in 2.0.0
markrad 0:cdf462088d13 133 *
markrad 0:cdf462088d13 134 * \param ctx Context to set up.
markrad 0:cdf462088d13 135 * \param md_info Message digest to use.
markrad 0:cdf462088d13 136 *
markrad 0:cdf462088d13 137 * \returns \c 0 on success,
markrad 0:cdf462088d13 138 * \c MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter failure,
markrad 0:cdf462088d13 139 * \c MBEDTLS_ERR_MD_ALLOC_FAILED memory allocation failure.
markrad 0:cdf462088d13 140 */
markrad 0:cdf462088d13 141 int mbedtls_md_init_ctx( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info ) MBEDTLS_DEPRECATED;
markrad 0:cdf462088d13 142 #undef MBEDTLS_DEPRECATED
markrad 0:cdf462088d13 143 #endif /* MBEDTLS_DEPRECATED_REMOVED */
markrad 0:cdf462088d13 144
markrad 0:cdf462088d13 145 /**
markrad 0:cdf462088d13 146 * \brief Select MD to use and allocate internal structures.
markrad 0:cdf462088d13 147 * Should be called after mbedtls_md_init() or mbedtls_md_free().
markrad 0:cdf462088d13 148 * Makes it necessary to call mbedtls_md_free() later.
markrad 0:cdf462088d13 149 *
markrad 0:cdf462088d13 150 * \param ctx Context to set up.
markrad 0:cdf462088d13 151 * \param md_info Message digest to use.
markrad 0:cdf462088d13 152 * \param hmac 0 to save some memory if HMAC will not be used,
markrad 0:cdf462088d13 153 * non-zero is HMAC is going to be used with this context.
markrad 0:cdf462088d13 154 *
markrad 0:cdf462088d13 155 * \returns \c 0 on success,
markrad 0:cdf462088d13 156 * \c MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter failure,
markrad 0:cdf462088d13 157 * \c MBEDTLS_ERR_MD_ALLOC_FAILED memory allocation failure.
markrad 0:cdf462088d13 158 */
markrad 0:cdf462088d13 159 int mbedtls_md_setup( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info, int hmac );
markrad 0:cdf462088d13 160
markrad 0:cdf462088d13 161 /**
markrad 0:cdf462088d13 162 * \brief Clone the state of an MD context
markrad 0:cdf462088d13 163 *
markrad 0:cdf462088d13 164 * \note The two contexts must have been setup to the same type
markrad 0:cdf462088d13 165 * (cloning from SHA-256 to SHA-512 make no sense).
markrad 0:cdf462088d13 166 *
markrad 0:cdf462088d13 167 * \warning Only clones the MD state, not the HMAC state! (for now)
markrad 0:cdf462088d13 168 *
markrad 0:cdf462088d13 169 * \param dst The destination context
markrad 0:cdf462088d13 170 * \param src The context to be cloned
markrad 0:cdf462088d13 171 *
markrad 0:cdf462088d13 172 * \return \c 0 on success,
markrad 0:cdf462088d13 173 * \c MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter failure.
markrad 0:cdf462088d13 174 */
markrad 0:cdf462088d13 175 int mbedtls_md_clone( mbedtls_md_context_t *dst,
markrad 0:cdf462088d13 176 const mbedtls_md_context_t *src );
markrad 0:cdf462088d13 177
markrad 0:cdf462088d13 178 /**
markrad 0:cdf462088d13 179 * \brief Returns the size of the message digest output.
markrad 0:cdf462088d13 180 *
markrad 0:cdf462088d13 181 * \param md_info message digest info
markrad 0:cdf462088d13 182 *
markrad 0:cdf462088d13 183 * \return size of the message digest output in bytes.
markrad 0:cdf462088d13 184 */
markrad 0:cdf462088d13 185 unsigned char mbedtls_md_get_size( const mbedtls_md_info_t *md_info );
markrad 0:cdf462088d13 186
markrad 0:cdf462088d13 187 /**
markrad 0:cdf462088d13 188 * \brief Returns the type of the message digest output.
markrad 0:cdf462088d13 189 *
markrad 0:cdf462088d13 190 * \param md_info message digest info
markrad 0:cdf462088d13 191 *
markrad 0:cdf462088d13 192 * \return type of the message digest output.
markrad 0:cdf462088d13 193 */
markrad 0:cdf462088d13 194 mbedtls_md_type_t mbedtls_md_get_type( const mbedtls_md_info_t *md_info );
markrad 0:cdf462088d13 195
markrad 0:cdf462088d13 196 /**
markrad 0:cdf462088d13 197 * \brief Returns the name of the message digest output.
markrad 0:cdf462088d13 198 *
markrad 0:cdf462088d13 199 * \param md_info message digest info
markrad 0:cdf462088d13 200 *
markrad 0:cdf462088d13 201 * \return name of the message digest output.
markrad 0:cdf462088d13 202 */
markrad 0:cdf462088d13 203 const char *mbedtls_md_get_name( const mbedtls_md_info_t *md_info );
markrad 0:cdf462088d13 204
markrad 0:cdf462088d13 205 /**
markrad 0:cdf462088d13 206 * \brief Prepare the context to digest a new message.
markrad 0:cdf462088d13 207 * Generally called after mbedtls_md_setup() or mbedtls_md_finish().
markrad 0:cdf462088d13 208 * Followed by mbedtls_md_update().
markrad 0:cdf462088d13 209 *
markrad 0:cdf462088d13 210 * \param ctx generic message digest context.
markrad 0:cdf462088d13 211 *
markrad 0:cdf462088d13 212 * \returns 0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter
markrad 0:cdf462088d13 213 * verification fails.
markrad 0:cdf462088d13 214 */
markrad 0:cdf462088d13 215 int mbedtls_md_starts( mbedtls_md_context_t *ctx );
markrad 0:cdf462088d13 216
markrad 0:cdf462088d13 217 /**
markrad 0:cdf462088d13 218 * \brief Generic message digest process buffer
markrad 0:cdf462088d13 219 * Called between mbedtls_md_starts() and mbedtls_md_finish().
markrad 0:cdf462088d13 220 * May be called repeatedly.
markrad 0:cdf462088d13 221 *
markrad 0:cdf462088d13 222 * \param ctx Generic message digest context
markrad 0:cdf462088d13 223 * \param input buffer holding the datal
markrad 0:cdf462088d13 224 * \param ilen length of the input data
markrad 0:cdf462088d13 225 *
markrad 0:cdf462088d13 226 * \returns 0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter
markrad 0:cdf462088d13 227 * verification fails.
markrad 0:cdf462088d13 228 */
markrad 0:cdf462088d13 229 int mbedtls_md_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen );
markrad 0:cdf462088d13 230
markrad 0:cdf462088d13 231 /**
markrad 0:cdf462088d13 232 * \brief Generic message digest final digest
markrad 0:cdf462088d13 233 * Called after mbedtls_md_update().
markrad 0:cdf462088d13 234 * Usually followed by mbedtls_md_free() or mbedtls_md_starts().
markrad 0:cdf462088d13 235 *
markrad 0:cdf462088d13 236 * \param ctx Generic message digest context
markrad 0:cdf462088d13 237 * \param output Generic message digest checksum result
markrad 0:cdf462088d13 238 *
markrad 0:cdf462088d13 239 * \returns 0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter
markrad 0:cdf462088d13 240 * verification fails.
markrad 0:cdf462088d13 241 */
markrad 0:cdf462088d13 242 int mbedtls_md_finish( mbedtls_md_context_t *ctx, unsigned char *output );
markrad 0:cdf462088d13 243
markrad 0:cdf462088d13 244 /**
markrad 0:cdf462088d13 245 * \brief Output = message_digest( input buffer )
markrad 0:cdf462088d13 246 *
markrad 0:cdf462088d13 247 * \param md_info message digest info
markrad 0:cdf462088d13 248 * \param input buffer holding the data
markrad 0:cdf462088d13 249 * \param ilen length of the input data
markrad 0:cdf462088d13 250 * \param output Generic message digest checksum result
markrad 0:cdf462088d13 251 *
markrad 0:cdf462088d13 252 * \returns 0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter
markrad 0:cdf462088d13 253 * verification fails.
markrad 0:cdf462088d13 254 */
markrad 0:cdf462088d13 255 int mbedtls_md( const mbedtls_md_info_t *md_info, const unsigned char *input, size_t ilen,
markrad 0:cdf462088d13 256 unsigned char *output );
markrad 0:cdf462088d13 257
markrad 0:cdf462088d13 258 #if defined(MBEDTLS_FS_IO)
markrad 0:cdf462088d13 259 /**
markrad 0:cdf462088d13 260 * \brief Output = message_digest( file contents )
markrad 0:cdf462088d13 261 *
markrad 0:cdf462088d13 262 * \param md_info message digest info
markrad 0:cdf462088d13 263 * \param path input file name
markrad 0:cdf462088d13 264 * \param output generic message digest checksum result
markrad 0:cdf462088d13 265 *
markrad 0:cdf462088d13 266 * \return 0 if successful,
markrad 0:cdf462088d13 267 * MBEDTLS_ERR_MD_FILE_IO_ERROR if file input failed,
markrad 0:cdf462088d13 268 * MBEDTLS_ERR_MD_BAD_INPUT_DATA if md_info was NULL.
markrad 0:cdf462088d13 269 */
markrad 0:cdf462088d13 270 int mbedtls_md_file( const mbedtls_md_info_t *md_info, const char *path,
markrad 0:cdf462088d13 271 unsigned char *output );
markrad 0:cdf462088d13 272 #endif /* MBEDTLS_FS_IO */
markrad 0:cdf462088d13 273
markrad 0:cdf462088d13 274 /**
markrad 0:cdf462088d13 275 * \brief Set HMAC key and prepare to authenticate a new message.
markrad 0:cdf462088d13 276 * Usually called after mbedtls_md_setup() or mbedtls_md_hmac_finish().
markrad 0:cdf462088d13 277 *
markrad 0:cdf462088d13 278 * \param ctx HMAC context
markrad 0:cdf462088d13 279 * \param key HMAC secret key
markrad 0:cdf462088d13 280 * \param keylen length of the HMAC key in bytes
markrad 0:cdf462088d13 281 *
markrad 0:cdf462088d13 282 * \returns 0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter
markrad 0:cdf462088d13 283 * verification fails.
markrad 0:cdf462088d13 284 */
markrad 0:cdf462088d13 285 int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key,
markrad 0:cdf462088d13 286 size_t keylen );
markrad 0:cdf462088d13 287
markrad 0:cdf462088d13 288 /**
markrad 0:cdf462088d13 289 * \brief Generic HMAC process buffer.
markrad 0:cdf462088d13 290 * Called between mbedtls_md_hmac_starts() or mbedtls_md_hmac_reset()
markrad 0:cdf462088d13 291 * and mbedtls_md_hmac_finish().
markrad 0:cdf462088d13 292 * May be called repeatedly.
markrad 0:cdf462088d13 293 *
markrad 0:cdf462088d13 294 * \param ctx HMAC context
markrad 0:cdf462088d13 295 * \param input buffer holding the data
markrad 0:cdf462088d13 296 * \param ilen length of the input data
markrad 0:cdf462088d13 297 *
markrad 0:cdf462088d13 298 * \returns 0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter
markrad 0:cdf462088d13 299 * verification fails.
markrad 0:cdf462088d13 300 */
markrad 0:cdf462088d13 301 int mbedtls_md_hmac_update( mbedtls_md_context_t *ctx, const unsigned char *input,
markrad 0:cdf462088d13 302 size_t ilen );
markrad 0:cdf462088d13 303
markrad 0:cdf462088d13 304 /**
markrad 0:cdf462088d13 305 * \brief Output HMAC.
markrad 0:cdf462088d13 306 * Called after mbedtls_md_hmac_update().
markrad 0:cdf462088d13 307 * Usually followed by mbedtls_md_hmac_reset(),
markrad 0:cdf462088d13 308 * mbedtls_md_hmac_starts(), or mbedtls_md_free().
markrad 0:cdf462088d13 309 *
markrad 0:cdf462088d13 310 * \param ctx HMAC context
markrad 0:cdf462088d13 311 * \param output Generic HMAC checksum result
markrad 0:cdf462088d13 312 *
markrad 0:cdf462088d13 313 * \returns 0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter
markrad 0:cdf462088d13 314 * verification fails.
markrad 0:cdf462088d13 315 */
markrad 0:cdf462088d13 316 int mbedtls_md_hmac_finish( mbedtls_md_context_t *ctx, unsigned char *output);
markrad 0:cdf462088d13 317
markrad 0:cdf462088d13 318 /**
markrad 0:cdf462088d13 319 * \brief Prepare to authenticate a new message with the same key.
markrad 0:cdf462088d13 320 * Called after mbedtls_md_hmac_finish() and before
markrad 0:cdf462088d13 321 * mbedtls_md_hmac_update().
markrad 0:cdf462088d13 322 *
markrad 0:cdf462088d13 323 * \param ctx HMAC context to be reset
markrad 0:cdf462088d13 324 *
markrad 0:cdf462088d13 325 * \returns 0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter
markrad 0:cdf462088d13 326 * verification fails.
markrad 0:cdf462088d13 327 */
markrad 0:cdf462088d13 328 int mbedtls_md_hmac_reset( mbedtls_md_context_t *ctx );
markrad 0:cdf462088d13 329
markrad 0:cdf462088d13 330 /**
markrad 0:cdf462088d13 331 * \brief Output = Generic_HMAC( hmac key, input buffer )
markrad 0:cdf462088d13 332 *
markrad 0:cdf462088d13 333 * \param md_info message digest info
markrad 0:cdf462088d13 334 * \param key HMAC secret key
markrad 0:cdf462088d13 335 * \param keylen length of the HMAC key in bytes
markrad 0:cdf462088d13 336 * \param input buffer holding the data
markrad 0:cdf462088d13 337 * \param ilen length of the input data
markrad 0:cdf462088d13 338 * \param output Generic HMAC-result
markrad 0:cdf462088d13 339 *
markrad 0:cdf462088d13 340 * \returns 0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter
markrad 0:cdf462088d13 341 * verification fails.
markrad 0:cdf462088d13 342 */
markrad 0:cdf462088d13 343 int mbedtls_md_hmac( const mbedtls_md_info_t *md_info, const unsigned char *key, size_t keylen,
markrad 0:cdf462088d13 344 const unsigned char *input, size_t ilen,
markrad 0:cdf462088d13 345 unsigned char *output );
markrad 0:cdf462088d13 346
markrad 0:cdf462088d13 347 /* Internal use */
markrad 0:cdf462088d13 348 int mbedtls_md_process( mbedtls_md_context_t *ctx, const unsigned char *data );
markrad 0:cdf462088d13 349
markrad 0:cdf462088d13 350 #ifdef __cplusplus
markrad 0:cdf462088d13 351 }
markrad 0:cdf462088d13 352 #endif
markrad 0:cdf462088d13 353
markrad 0:cdf462088d13 354 #endif /* MBEDTLS_MD_H */