| /** |
| * \file des.h |
| * |
| * \brief DES block cipher |
| * |
| * Copyright (C) 2006-2014, ARM Limited, All Rights Reserved |
| * |
| * This file is part of mbed TLS (https://polarssl.org) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| */ |
| #ifndef POLARSSL_DES_H |
| #define POLARSSL_DES_H |
| |
| #if !defined(POLARSSL_CONFIG_FILE) |
| #include "config.h" |
| #else |
| #include POLARSSL_CONFIG_FILE |
| #endif |
| |
| #include <string.h> |
| |
| #if defined(_MSC_VER) && !defined(EFIX64) && !defined(EFI32) |
| #include <basetsd.h> |
| typedef UINT32 uint32_t; |
| #else |
| #include <inttypes.h> |
| #endif |
| |
| #define DES_ENCRYPT 1 |
| #define DES_DECRYPT 0 |
| |
| #define POLARSSL_ERR_DES_INVALID_INPUT_LENGTH -0x0032 /**< The data input has an invalid length. */ |
| |
| #define DES_KEY_SIZE 8 |
| |
| #if !defined(POLARSSL_DES_ALT) |
| // Regular implementation |
| // |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** |
| * \brief DES context structure |
| */ |
| typedef struct |
| { |
| int mode; /*!< encrypt/decrypt */ |
| uint32_t sk[32]; /*!< DES subkeys */ |
| } |
| des_context; |
| |
| /** |
| * \brief Triple-DES context structure |
| */ |
| typedef struct |
| { |
| int mode; /*!< encrypt/decrypt */ |
| uint32_t sk[96]; /*!< 3DES subkeys */ |
| } |
| des3_context; |
| |
| /** |
| * \brief Initialize DES context |
| * |
| * \param ctx DES context to be initialized |
| */ |
| void des_init( des_context *ctx ); |
| |
| /** |
| * \brief Clear DES context |
| * |
| * \param ctx DES context to be cleared |
| */ |
| void des_free( des_context *ctx ); |
| |
| /** |
| * \brief Initialize Triple-DES context |
| * |
| * \param ctx DES3 context to be initialized |
| */ |
| void des3_init( des3_context *ctx ); |
| |
| /** |
| * \brief Clear Triple-DES context |
| * |
| * \param ctx DES3 context to be cleared |
| */ |
| void des3_free( 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 |
| */ |
| void des_key_set_parity( unsigned char key[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. |
| */ |
| int des_key_check_key_parity( const unsigned char key[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. |
| */ |
| int des_key_check_weak( const unsigned char key[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 |
| */ |
| int des_setkey_enc( des_context *ctx, const unsigned char key[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 |
| */ |
| int des_setkey_dec( des_context *ctx, const unsigned char key[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 des3_set2key_enc( des3_context *ctx, |
| const unsigned char key[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 des3_set2key_dec( des3_context *ctx, |
| const unsigned char key[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 des3_set3key_enc( des3_context *ctx, |
| const unsigned char key[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 des3_set3key_dec( des3_context *ctx, |
| const unsigned char key[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 |
| */ |
| int des_crypt_ecb( des_context *ctx, |
| const unsigned char input[8], |
| unsigned char output[8] ); |
| |
| #if defined(POLARSSL_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 DES_ENCRYPT or 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 |
| */ |
| int des_crypt_cbc( des_context *ctx, |
| int mode, |
| size_t length, |
| unsigned char iv[8], |
| const unsigned char *input, |
| unsigned char *output ); |
| #endif /* POLARSSL_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 des3_crypt_ecb( des3_context *ctx, |
| const unsigned char input[8], |
| unsigned char output[8] ); |
| |
| #if defined(POLARSSL_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 DES_ENCRYPT or 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 POLARSSL_ERR_DES_INVALID_INPUT_LENGTH |
| */ |
| int des3_crypt_cbc( des3_context *ctx, |
| int mode, |
| size_t length, |
| unsigned char iv[8], |
| const unsigned char *input, |
| unsigned char *output ); |
| #endif /* POLARSSL_CIPHER_MODE_CBC */ |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #else /* POLARSSL_DES_ALT */ |
| #include "des_alt.h" |
| #endif /* POLARSSL_DES_ALT */ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** |
| * \brief Checkup routine |
| * |
| * \return 0 if successful, or 1 if the test failed |
| */ |
| int des_self_test( int verbose ); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* des.h */ |