include/mbedtls/des.h (mbedTLS)

Outline

#define MBEDTLS_DES_H

#include "config.h"

#include

#include <stddef.h>

#include <stdint.h>

#define MBEDTLS_DES_ENCRYPT

#define MBEDTLS_DES_DECRYPT

#define MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH

#define MBEDTLS_ERR_DES_HW_ACCEL_FAILED

#define MBEDTLS_DES_KEY_SIZE

mbedtls_des_context

mbedtls_des3_context

#include "des_alt.h"

mbedtls_des_init(mbedtls_des_context *);

mbedtls_des_free(mbedtls_des_context *);

mbedtls_des3_init(mbedtls_des3_context *);

mbedtls_des3_free(mbedtls_des3_context *);

mbedtls_des_key_set_parity(unsigned char *);

mbedtls_des_key_check_key_parity(const unsigned char *);

mbedtls_des_key_check_weak(const unsigned char *);

mbedtls_des_setkey_enc(mbedtls_des_context *, const unsigned char *);

mbedtls_des_setkey_dec(mbedtls_des_context *, const unsigned char *);

mbedtls_des3_set2key_enc(mbedtls_des3_context *, const unsigned char *);

mbedtls_des3_set2key_dec(mbedtls_des3_context *, const unsigned char *);

mbedtls_des3_set3key_enc(mbedtls_des3_context *, const unsigned char *);

mbedtls_des3_set3key_dec(mbedtls_des3_context *, const unsigned char *);

mbedtls_des_crypt_ecb(mbedtls_des_context *, const unsigned char *, unsigned char *);

mbedtls_des3_crypt_ecb(mbedtls_des3_context *, const unsigned char *, unsigned char *);

mbedtls_des_setkey(uint32_t *, const unsigned char *);

Files

SourceVuSTM32 Libraries and SamplesmbedTLSinclude/mbedtls/des.h

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/** * \file des.h * * \brief DES block cipher * * \warning DES is considered a weak cipher and its use constitutes a * security risk. We recommend considering stronger ciphers * instead. */ /* * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved * SPDX-License-Identifier: Apache-2.0 * * Licensed under the Apache License, Version 2.0 (the "License"); you may * not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * This file is part of mbed TLS (https://tls.mbed.org) * */ #ifndef MBEDTLS_DES_H #define MBEDTLS_DES_H #if !defined(MBEDTLS_CONFIG_FILE) #include "config.h" #else #include MBEDTLS_CONFIG_FILE #endif #include <stddef.h> #include <stdint.h> #define MBEDTLS_DES_ENCRYPT 1 #define MBEDTLS_DES_DECRYPT 0 #define MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH -0x0032 /**< The data input has an invalid length. */ /* MBEDTLS_ERR_DES_HW_ACCEL_FAILED is deprecated and should not be used. */ #define MBEDTLS_ERR_DES_HW_ACCEL_FAILED -0x0033 /**< DES hardware accelerator failed. */ #define MBEDTLS_DES_KEY_SIZE 8 #ifdef __cplusplus extern "C" { #endif #if !defined(MBEDTLS_DES_ALT) // Regular implementation // /** * \brief DES context structure * * \warning DES is considered a weak cipher and its use constitutes a * security risk. We recommend considering stronger ciphers * instead. */ typedef struct mbedtls_des_context { uint32_t sk[32]; /*!< DES subkeys */ } mbedtls_des_context; /** * \brief Triple-DES context structure */ typedef struct mbedtls_des3_context { uint32_t sk[96]; /*!< 3DES subkeys */ } mbedtls_des3_context; #else /* MBEDTLS_DES_ALT */ #include "des_alt.h" #endif /* MBEDTLS_DES_ALT */ /** * \brief Initialize DES context * * \param ctx DES context to be initialized * * \warning DES is considered a weak cipher and its use constitutes a * security risk. We recommend considering stronger ciphers * instead. */ void mbedtls_des_init( mbedtls_des_context *ctx ); /** * \brief Clear DES context * * \param ctx DES context to be cleared * * \warning DES is considered a weak cipher and its use constitutes a * security risk. We recommend considering stronger ciphers * instead. */ void mbedtls_des_free( mbedtls_des_context *ctx ); /** * \brief Initialize Triple-DES context * * \param ctx DES3 context to be initialized */ void mbedtls_des3_init( mbedtls_des3_context *ctx ); /** * \brief Clear Triple-DES context * * \param ctx DES3 context to be cleared */ void mbedtls_des3_free( mbedtls_des3_context *ctx ); /** * \brief Set key parity on the given key to odd. * * DES keys are 56 bits long, but each byte is padded with * a parity bit to allow verification. * * \param key 8-byte secret key * * \warning DES is considered a weak cipher and its use constitutes a * security risk. We recommend considering stronger ciphers * instead. */ void mbedtls_des_key_set_parity( unsigned char key[MBEDTLS_DES_KEY_SIZE] ); /** * \brief Check that key parity on the given key is odd. * * DES keys are 56 bits long, but each byte is padded with * a parity bit to allow verification. * * \param key 8-byte secret key * * \return 0 is parity was ok, 1 if parity was not correct. * * \warning DES is considered a weak cipher and its use constitutes a * security risk. We recommend considering stronger ciphers * instead. */ int mbedtls_des_key_check_key_parity( const unsigned char key[MBEDTLS_DES_KEY_SIZE] ); /** * \brief Check that key is not a weak or semi-weak DES key * * \param key 8-byte secret key * * \return 0 if no weak key was found, 1 if a weak key was identified. * * \warning DES is considered a weak cipher and its use constitutes a * security risk. We recommend considering stronger ciphers * instead. */ int mbedtls_des_key_check_weak( const unsigned char key[MBEDTLS_DES_KEY_SIZE] ); /** * \brief DES key schedule (56-bit, encryption) * * \param ctx DES context to be initialized * \param key 8-byte secret key * * \return 0 * * \warning DES is considered a weak cipher and its use constitutes a * security risk. We recommend considering stronger ciphers * instead. */ int mbedtls_des_setkey_enc( mbedtls_des_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE] ); /** * \brief DES key schedule (56-bit, decryption) * * \param ctx DES context to be initialized * \param key 8-byte secret key * * \return 0 * * \warning DES is considered a weak cipher and its use constitutes a * security risk. We recommend considering stronger ciphers * instead. */ int mbedtls_des_setkey_dec( mbedtls_des_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE] ); /** * \brief Triple-DES key schedule (112-bit, encryption) * * \param ctx 3DES context to be initialized * \param key 16-byte secret key * * \return 0 */ int mbedtls_des3_set2key_enc( mbedtls_des3_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE * 2] ); /** * \brief Triple-DES key schedule (112-bit, decryption) * * \param ctx 3DES context to be initialized * \param key 16-byte secret key * * \return 0 */ int mbedtls_des3_set2key_dec( mbedtls_des3_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE * 2] ); /** * \brief Triple-DES key schedule (168-bit, encryption) * * \param ctx 3DES context to be initialized * \param key 24-byte secret key * * \return 0 */ int mbedtls_des3_set3key_enc( mbedtls_des3_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE * 3] ); /** * \brief Triple-DES key schedule (168-bit, decryption) * * \param ctx 3DES context to be initialized * \param key 24-byte secret key * * \return 0 */ int mbedtls_des3_set3key_dec( mbedtls_des3_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE * 3] ); /** * \brief DES-ECB block encryption/decryption * * \param ctx DES context * \param input 64-bit input block * \param output 64-bit output block * * \return 0 if successful * * \warning DES is considered a weak cipher and its use constitutes a * security risk. We recommend considering stronger ciphers * instead. */ int mbedtls_des_crypt_ecb( mbedtls_des_context *ctx, const unsigned char input[8], unsigned char output[8] ); #if defined(MBEDTLS_CIPHER_MODE_CBC) /** * \brief DES-CBC buffer encryption/decryption * * \note Upon exit, the content of the IV is updated so that you can * call the function same function again on the following * block(s) of data and get the same result as if it was * encrypted in one call. This allows a "streaming" usage. * If on the other hand you need to retain the contents of the * IV, you should either save it manually or use the cipher * module instead. * * \param ctx DES context * \param mode MBEDTLS_DES_ENCRYPT or MBEDTLS_DES_DECRYPT * \param length length of the input data * \param iv initialization vector (updated after use) * \param input buffer holding the input data * \param output buffer holding the output data * * \warning DES is considered a weak cipher and its use constitutes a * security risk. We recommend considering stronger ciphers * instead. */ int mbedtls_des_crypt_cbc( mbedtls_des_context *ctx, int mode, size_t length, unsigned char iv[8], const unsigned char *input, unsigned char *output ); #endif /* MBEDTLS_CIPHER_MODE_CBC */ /** * \brief 3DES-ECB block encryption/decryption * * \param ctx 3DES context * \param input 64-bit input block * \param output 64-bit output block * * \return 0 if successful */ int mbedtls_des3_crypt_ecb( mbedtls_des3_context *ctx, const unsigned char input[8], unsigned char output[8] ); #if defined(MBEDTLS_CIPHER_MODE_CBC) /** * \brief 3DES-CBC buffer encryption/decryption * * \note Upon exit, the content of the IV is updated so that you can * call the function same function again on the following * block(s) of data and get the same result as if it was * encrypted in one call. This allows a "streaming" usage. * If on the other hand you need to retain the contents of the * IV, you should either save it manually or use the cipher * module instead. * * \param ctx 3DES context * \param mode MBEDTLS_DES_ENCRYPT or MBEDTLS_DES_DECRYPT * \param length length of the input data * \param iv initialization vector (updated after use) * \param input buffer holding the input data * \param output buffer holding the output data * * \return 0 if successful, or MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH */ int mbedtls_des3_crypt_cbc( mbedtls_des3_context *ctx, int mode, size_t length, unsigned char iv[8], const unsigned char *input, unsigned char *output ); #endif /* MBEDTLS_CIPHER_MODE_CBC */ /** * \brief Internal function for key expansion. * (Only exposed to allow overriding it, * see MBEDTLS_DES_SETKEY_ALT) * * \param SK Round keys * \param key Base key * * \warning DES is considered a weak cipher and its use constitutes a * security risk. We recommend considering stronger ciphers * instead. */ void mbedtls_des_setkey( uint32_t SK[32], const unsigned char key[MBEDTLS_DES_KEY_SIZE] ); #if defined(MBEDTLS_SELF_TEST) /** * \brief Checkup routine * * \return 0 if successful, or 1 if the test failed */ int mbedtls_des_self_test( int verbose ); #endif /* MBEDTLS_SELF_TEST */ #ifdef __cplusplus } #endif #endif /* des.h */

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