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include/mbedtls/des.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 des.h
markrad 0:cdf462088d13 3 *
markrad 0:cdf462088d13 4 * \brief DES block cipher
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_DES_H
markrad 0:cdf462088d13 24 #define MBEDTLS_DES_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 #include <stdint.h>
markrad 0:cdf462088d13 34
markrad 0:cdf462088d13 35 #define MBEDTLS_DES_ENCRYPT 1
markrad 0:cdf462088d13 36 #define MBEDTLS_DES_DECRYPT 0
markrad 0:cdf462088d13 37
markrad 0:cdf462088d13 38 #define MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH -0x0032 /**< The data input has an invalid length. */
markrad 0:cdf462088d13 39
markrad 0:cdf462088d13 40 #define MBEDTLS_DES_KEY_SIZE 8
markrad 0:cdf462088d13 41
markrad 0:cdf462088d13 42 #if !defined(MBEDTLS_DES_ALT)
markrad 0:cdf462088d13 43 // Regular implementation
markrad 0:cdf462088d13 44 //
markrad 0:cdf462088d13 45
markrad 0:cdf462088d13 46 #ifdef __cplusplus
markrad 0:cdf462088d13 47 extern "C" {
markrad 0:cdf462088d13 48 #endif
markrad 0:cdf462088d13 49
markrad 0:cdf462088d13 50 /**
markrad 0:cdf462088d13 51 * \brief DES context structure
markrad 0:cdf462088d13 52 */
markrad 0:cdf462088d13 53 typedef struct
markrad 0:cdf462088d13 54 {
markrad 0:cdf462088d13 55 uint32_t sk[32]; /*!< DES subkeys */
markrad 0:cdf462088d13 56 }
markrad 0:cdf462088d13 57 mbedtls_des_context;
markrad 0:cdf462088d13 58
markrad 0:cdf462088d13 59 /**
markrad 0:cdf462088d13 60 * \brief Triple-DES context structure
markrad 0:cdf462088d13 61 */
markrad 0:cdf462088d13 62 typedef struct
markrad 0:cdf462088d13 63 {
markrad 0:cdf462088d13 64 uint32_t sk[96]; /*!< 3DES subkeys */
markrad 0:cdf462088d13 65 }
markrad 0:cdf462088d13 66 mbedtls_des3_context;
markrad 0:cdf462088d13 67
markrad 0:cdf462088d13 68 /**
markrad 0:cdf462088d13 69 * \brief Initialize DES context
markrad 0:cdf462088d13 70 *
markrad 0:cdf462088d13 71 * \param ctx DES context to be initialized
markrad 0:cdf462088d13 72 */
markrad 0:cdf462088d13 73 void mbedtls_des_init( mbedtls_des_context *ctx );
markrad 0:cdf462088d13 74
markrad 0:cdf462088d13 75 /**
markrad 0:cdf462088d13 76 * \brief Clear DES context
markrad 0:cdf462088d13 77 *
markrad 0:cdf462088d13 78 * \param ctx DES context to be cleared
markrad 0:cdf462088d13 79 */
markrad 0:cdf462088d13 80 void mbedtls_des_free( mbedtls_des_context *ctx );
markrad 0:cdf462088d13 81
markrad 0:cdf462088d13 82 /**
markrad 0:cdf462088d13 83 * \brief Initialize Triple-DES context
markrad 0:cdf462088d13 84 *
markrad 0:cdf462088d13 85 * \param ctx DES3 context to be initialized
markrad 0:cdf462088d13 86 */
markrad 0:cdf462088d13 87 void mbedtls_des3_init( mbedtls_des3_context *ctx );
markrad 0:cdf462088d13 88
markrad 0:cdf462088d13 89 /**
markrad 0:cdf462088d13 90 * \brief Clear Triple-DES context
markrad 0:cdf462088d13 91 *
markrad 0:cdf462088d13 92 * \param ctx DES3 context to be cleared
markrad 0:cdf462088d13 93 */
markrad 0:cdf462088d13 94 void mbedtls_des3_free( mbedtls_des3_context *ctx );
markrad 0:cdf462088d13 95
markrad 0:cdf462088d13 96 /**
markrad 0:cdf462088d13 97 * \brief Set key parity on the given key to odd.
markrad 0:cdf462088d13 98 *
markrad 0:cdf462088d13 99 * DES keys are 56 bits long, but each byte is padded with
markrad 0:cdf462088d13 100 * a parity bit to allow verification.
markrad 0:cdf462088d13 101 *
markrad 0:cdf462088d13 102 * \param key 8-byte secret key
markrad 0:cdf462088d13 103 */
markrad 0:cdf462088d13 104 void mbedtls_des_key_set_parity( unsigned char key[MBEDTLS_DES_KEY_SIZE] );
markrad 0:cdf462088d13 105
markrad 0:cdf462088d13 106 /**
markrad 0:cdf462088d13 107 * \brief Check that key parity on the given key is odd.
markrad 0:cdf462088d13 108 *
markrad 0:cdf462088d13 109 * DES keys are 56 bits long, but each byte is padded with
markrad 0:cdf462088d13 110 * a parity bit to allow verification.
markrad 0:cdf462088d13 111 *
markrad 0:cdf462088d13 112 * \param key 8-byte secret key
markrad 0:cdf462088d13 113 *
markrad 0:cdf462088d13 114 * \return 0 is parity was ok, 1 if parity was not correct.
markrad 0:cdf462088d13 115 */
markrad 0:cdf462088d13 116 int mbedtls_des_key_check_key_parity( const unsigned char key[MBEDTLS_DES_KEY_SIZE] );
markrad 0:cdf462088d13 117
markrad 0:cdf462088d13 118 /**
markrad 0:cdf462088d13 119 * \brief Check that key is not a weak or semi-weak DES key
markrad 0:cdf462088d13 120 *
markrad 0:cdf462088d13 121 * \param key 8-byte secret key
markrad 0:cdf462088d13 122 *
markrad 0:cdf462088d13 123 * \return 0 if no weak key was found, 1 if a weak key was identified.
markrad 0:cdf462088d13 124 */
markrad 0:cdf462088d13 125 int mbedtls_des_key_check_weak( const unsigned char key[MBEDTLS_DES_KEY_SIZE] );
markrad 0:cdf462088d13 126
markrad 0:cdf462088d13 127 /**
markrad 0:cdf462088d13 128 * \brief DES key schedule (56-bit, encryption)
markrad 0:cdf462088d13 129 *
markrad 0:cdf462088d13 130 * \param ctx DES context to be initialized
markrad 0:cdf462088d13 131 * \param key 8-byte secret key
markrad 0:cdf462088d13 132 *
markrad 0:cdf462088d13 133 * \return 0
markrad 0:cdf462088d13 134 */
markrad 0:cdf462088d13 135 int mbedtls_des_setkey_enc( mbedtls_des_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE] );
markrad 0:cdf462088d13 136
markrad 0:cdf462088d13 137 /**
markrad 0:cdf462088d13 138 * \brief DES key schedule (56-bit, decryption)
markrad 0:cdf462088d13 139 *
markrad 0:cdf462088d13 140 * \param ctx DES context to be initialized
markrad 0:cdf462088d13 141 * \param key 8-byte secret key
markrad 0:cdf462088d13 142 *
markrad 0:cdf462088d13 143 * \return 0
markrad 0:cdf462088d13 144 */
markrad 0:cdf462088d13 145 int mbedtls_des_setkey_dec( mbedtls_des_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE] );
markrad 0:cdf462088d13 146
markrad 0:cdf462088d13 147 /**
markrad 0:cdf462088d13 148 * \brief Triple-DES key schedule (112-bit, encryption)
markrad 0:cdf462088d13 149 *
markrad 0:cdf462088d13 150 * \param ctx 3DES context to be initialized
markrad 0:cdf462088d13 151 * \param key 16-byte secret key
markrad 0:cdf462088d13 152 *
markrad 0:cdf462088d13 153 * \return 0
markrad 0:cdf462088d13 154 */
markrad 0:cdf462088d13 155 int mbedtls_des3_set2key_enc( mbedtls_des3_context *ctx,
markrad 0:cdf462088d13 156 const unsigned char key[MBEDTLS_DES_KEY_SIZE * 2] );
markrad 0:cdf462088d13 157
markrad 0:cdf462088d13 158 /**
markrad 0:cdf462088d13 159 * \brief Triple-DES key schedule (112-bit, decryption)
markrad 0:cdf462088d13 160 *
markrad 0:cdf462088d13 161 * \param ctx 3DES context to be initialized
markrad 0:cdf462088d13 162 * \param key 16-byte secret key
markrad 0:cdf462088d13 163 *
markrad 0:cdf462088d13 164 * \return 0
markrad 0:cdf462088d13 165 */
markrad 0:cdf462088d13 166 int mbedtls_des3_set2key_dec( mbedtls_des3_context *ctx,
markrad 0:cdf462088d13 167 const unsigned char key[MBEDTLS_DES_KEY_SIZE * 2] );
markrad 0:cdf462088d13 168
markrad 0:cdf462088d13 169 /**
markrad 0:cdf462088d13 170 * \brief Triple-DES key schedule (168-bit, encryption)
markrad 0:cdf462088d13 171 *
markrad 0:cdf462088d13 172 * \param ctx 3DES context to be initialized
markrad 0:cdf462088d13 173 * \param key 24-byte secret key
markrad 0:cdf462088d13 174 *
markrad 0:cdf462088d13 175 * \return 0
markrad 0:cdf462088d13 176 */
markrad 0:cdf462088d13 177 int mbedtls_des3_set3key_enc( mbedtls_des3_context *ctx,
markrad 0:cdf462088d13 178 const unsigned char key[MBEDTLS_DES_KEY_SIZE * 3] );
markrad 0:cdf462088d13 179
markrad 0:cdf462088d13 180 /**
markrad 0:cdf462088d13 181 * \brief Triple-DES key schedule (168-bit, decryption)
markrad 0:cdf462088d13 182 *
markrad 0:cdf462088d13 183 * \param ctx 3DES context to be initialized
markrad 0:cdf462088d13 184 * \param key 24-byte secret key
markrad 0:cdf462088d13 185 *
markrad 0:cdf462088d13 186 * \return 0
markrad 0:cdf462088d13 187 */
markrad 0:cdf462088d13 188 int mbedtls_des3_set3key_dec( mbedtls_des3_context *ctx,
markrad 0:cdf462088d13 189 const unsigned char key[MBEDTLS_DES_KEY_SIZE * 3] );
markrad 0:cdf462088d13 190
markrad 0:cdf462088d13 191 /**
markrad 0:cdf462088d13 192 * \brief DES-ECB block encryption/decryption
markrad 0:cdf462088d13 193 *
markrad 0:cdf462088d13 194 * \param ctx DES context
markrad 0:cdf462088d13 195 * \param input 64-bit input block
markrad 0:cdf462088d13 196 * \param output 64-bit output block
markrad 0:cdf462088d13 197 *
markrad 0:cdf462088d13 198 * \return 0 if successful
markrad 0:cdf462088d13 199 */
markrad 0:cdf462088d13 200 int mbedtls_des_crypt_ecb( mbedtls_des_context *ctx,
markrad 0:cdf462088d13 201 const unsigned char input[8],
markrad 0:cdf462088d13 202 unsigned char output[8] );
markrad 0:cdf462088d13 203
markrad 0:cdf462088d13 204 #if defined(MBEDTLS_CIPHER_MODE_CBC)
markrad 0:cdf462088d13 205 /**
markrad 0:cdf462088d13 206 * \brief DES-CBC buffer encryption/decryption
markrad 0:cdf462088d13 207 *
markrad 0:cdf462088d13 208 * \note Upon exit, the content of the IV is updated so that you can
markrad 0:cdf462088d13 209 * call the function same function again on the following
markrad 0:cdf462088d13 210 * block(s) of data and get the same result as if it was
markrad 0:cdf462088d13 211 * encrypted in one call. This allows a "streaming" usage.
markrad 0:cdf462088d13 212 * If on the other hand you need to retain the contents of the
markrad 0:cdf462088d13 213 * IV, you should either save it manually or use the cipher
markrad 0:cdf462088d13 214 * module instead.
markrad 0:cdf462088d13 215 *
markrad 0:cdf462088d13 216 * \param ctx DES context
markrad 0:cdf462088d13 217 * \param mode MBEDTLS_DES_ENCRYPT or MBEDTLS_DES_DECRYPT
markrad 0:cdf462088d13 218 * \param length length of the input data
markrad 0:cdf462088d13 219 * \param iv initialization vector (updated after use)
markrad 0:cdf462088d13 220 * \param input buffer holding the input data
markrad 0:cdf462088d13 221 * \param output buffer holding the output data
markrad 0:cdf462088d13 222 */
markrad 0:cdf462088d13 223 int mbedtls_des_crypt_cbc( mbedtls_des_context *ctx,
markrad 0:cdf462088d13 224 int mode,
markrad 0:cdf462088d13 225 size_t length,
markrad 0:cdf462088d13 226 unsigned char iv[8],
markrad 0:cdf462088d13 227 const unsigned char *input,
markrad 0:cdf462088d13 228 unsigned char *output );
markrad 0:cdf462088d13 229 #endif /* MBEDTLS_CIPHER_MODE_CBC */
markrad 0:cdf462088d13 230
markrad 0:cdf462088d13 231 /**
markrad 0:cdf462088d13 232 * \brief 3DES-ECB block encryption/decryption
markrad 0:cdf462088d13 233 *
markrad 0:cdf462088d13 234 * \param ctx 3DES context
markrad 0:cdf462088d13 235 * \param input 64-bit input block
markrad 0:cdf462088d13 236 * \param output 64-bit output block
markrad 0:cdf462088d13 237 *
markrad 0:cdf462088d13 238 * \return 0 if successful
markrad 0:cdf462088d13 239 */
markrad 0:cdf462088d13 240 int mbedtls_des3_crypt_ecb( mbedtls_des3_context *ctx,
markrad 0:cdf462088d13 241 const unsigned char input[8],
markrad 0:cdf462088d13 242 unsigned char output[8] );
markrad 0:cdf462088d13 243
markrad 0:cdf462088d13 244 #if defined(MBEDTLS_CIPHER_MODE_CBC)
markrad 0:cdf462088d13 245 /**
markrad 0:cdf462088d13 246 * \brief 3DES-CBC buffer encryption/decryption
markrad 0:cdf462088d13 247 *
markrad 0:cdf462088d13 248 * \note Upon exit, the content of the IV is updated so that you can
markrad 0:cdf462088d13 249 * call the function same function again on the following
markrad 0:cdf462088d13 250 * block(s) of data and get the same result as if it was
markrad 0:cdf462088d13 251 * encrypted in one call. This allows a "streaming" usage.
markrad 0:cdf462088d13 252 * If on the other hand you need to retain the contents of the
markrad 0:cdf462088d13 253 * IV, you should either save it manually or use the cipher
markrad 0:cdf462088d13 254 * module instead.
markrad 0:cdf462088d13 255 *
markrad 0:cdf462088d13 256 * \param ctx 3DES context
markrad 0:cdf462088d13 257 * \param mode MBEDTLS_DES_ENCRYPT or MBEDTLS_DES_DECRYPT
markrad 0:cdf462088d13 258 * \param length length of the input data
markrad 0:cdf462088d13 259 * \param iv initialization vector (updated after use)
markrad 0:cdf462088d13 260 * \param input buffer holding the input data
markrad 0:cdf462088d13 261 * \param output buffer holding the output data
markrad 0:cdf462088d13 262 *
markrad 0:cdf462088d13 263 * \return 0 if successful, or MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH
markrad 0:cdf462088d13 264 */
markrad 0:cdf462088d13 265 int mbedtls_des3_crypt_cbc( mbedtls_des3_context *ctx,
markrad 0:cdf462088d13 266 int mode,
markrad 0:cdf462088d13 267 size_t length,
markrad 0:cdf462088d13 268 unsigned char iv[8],
markrad 0:cdf462088d13 269 const unsigned char *input,
markrad 0:cdf462088d13 270 unsigned char *output );
markrad 0:cdf462088d13 271 #endif /* MBEDTLS_CIPHER_MODE_CBC */
markrad 0:cdf462088d13 272
markrad 0:cdf462088d13 273 /**
markrad 0:cdf462088d13 274 * \brief Internal function for key expansion.
markrad 0:cdf462088d13 275 * (Only exposed to allow overriding it,
markrad 0:cdf462088d13 276 * see MBEDTLS_DES_SETKEY_ALT)
markrad 0:cdf462088d13 277 *
markrad 0:cdf462088d13 278 * \param SK Round keys
markrad 0:cdf462088d13 279 * \param key Base key
markrad 0:cdf462088d13 280 */
markrad 0:cdf462088d13 281 void mbedtls_des_setkey( uint32_t SK[32],
markrad 0:cdf462088d13 282 const unsigned char key[MBEDTLS_DES_KEY_SIZE] );
markrad 0:cdf462088d13 283 #ifdef __cplusplus
markrad 0:cdf462088d13 284 }
markrad 0:cdf462088d13 285 #endif
markrad 0:cdf462088d13 286
markrad 0:cdf462088d13 287 #else /* MBEDTLS_DES_ALT */
markrad 0:cdf462088d13 288 #include "des_alt.h"
markrad 0:cdf462088d13 289 #endif /* MBEDTLS_DES_ALT */
markrad 0:cdf462088d13 290
markrad 0:cdf462088d13 291 #ifdef __cplusplus
markrad 0:cdf462088d13 292 extern "C" {
markrad 0:cdf462088d13 293 #endif
markrad 0:cdf462088d13 294
markrad 0:cdf462088d13 295 /**
markrad 0:cdf462088d13 296 * \brief Checkup routine
markrad 0:cdf462088d13 297 *
markrad 0:cdf462088d13 298 * \return 0 if successful, or 1 if the test failed
markrad 0:cdf462088d13 299 */
markrad 0:cdf462088d13 300 int mbedtls_des_self_test( int verbose );
markrad 0:cdf462088d13 301
markrad 0:cdf462088d13 302 #ifdef __cplusplus
markrad 0:cdf462088d13 303 }
markrad 0:cdf462088d13 304 #endif
markrad 0:cdf462088d13 305
markrad 0:cdf462088d13 306 #endif /* des.h */