/** * \file xtea.h * * \brief XTEA block cipher (32-bit) */ /* * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved * SPDX-License-Identifier: GPL-2.0 * * 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. * * This file is part of mbed TLS (https://tls.mbed.org) */ #ifndef MBEDTLS_XTEA_H #define MBEDTLS_XTEA_H #if !defined(MBEDTLS_CONFIG_FILE) #include "config.h" #else #include MBEDTLS_CONFIG_FILE #endif #include #include #define MBEDTLS_XTEA_ENCRYPT 1 #define MBEDTLS_XTEA_DECRYPT 0 #define MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH -0x0028 /**< The data input has an invalid length. */ /* MBEDTLS_ERR_XTEA_HW_ACCEL_FAILED is deprecated and should not be used. */ #define MBEDTLS_ERR_XTEA_HW_ACCEL_FAILED -0x0029 /**< XTEA hardware accelerator failed. */ #ifdef __cplusplus extern "C" { #endif #if !defined(MBEDTLS_XTEA_ALT) // Regular implementation // /** * \brief XTEA context structure */ typedef struct mbedtls_xtea_context { uint32_t k[4]; /*!< key */ } mbedtls_xtea_context; #else /* MBEDTLS_XTEA_ALT */ #include "xtea_alt.h" #endif /* MBEDTLS_XTEA_ALT */ /** * \brief Initialize XTEA context * * \param ctx XTEA context to be initialized */ void mbedtls_xtea_init( mbedtls_xtea_context *ctx ); /** * \brief Clear XTEA context * * \param ctx XTEA context to be cleared */ void mbedtls_xtea_free( mbedtls_xtea_context *ctx ); /** * \brief XTEA key schedule * * \param ctx XTEA context to be initialized * \param key the secret key */ void mbedtls_xtea_setup( mbedtls_xtea_context *ctx, const unsigned char key[16] ); /** * \brief XTEA cipher function * * \param ctx XTEA context * \param mode MBEDTLS_XTEA_ENCRYPT or MBEDTLS_XTEA_DECRYPT * \param input 8-byte input block * \param output 8-byte output block * * \return 0 if successful */ int mbedtls_xtea_crypt_ecb( mbedtls_xtea_context *ctx, int mode, const unsigned char input[8], unsigned char output[8] ); #if defined(MBEDTLS_CIPHER_MODE_CBC) /** * \brief XTEA CBC cipher function * * \param ctx XTEA context * \param mode MBEDTLS_XTEA_ENCRYPT or MBEDTLS_XTEA_DECRYPT * \param length the length of input, multiple of 8 * \param iv initialization vector for CBC mode * \param input input block * \param output output block * * \return 0 if successful, * MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH if the length % 8 != 0 */ int mbedtls_xtea_crypt_cbc( mbedtls_xtea_context *ctx, int mode, size_t length, unsigned char iv[8], const unsigned char *input, unsigned char *output); #endif /* MBEDTLS_CIPHER_MODE_CBC */ #if defined(MBEDTLS_SELF_TEST) /** * \brief Checkup routine * * \return 0 if successful, or 1 if the test failed */ int mbedtls_xtea_self_test( int verbose ); #endif /* MBEDTLS_SELF_TEST */ #ifdef __cplusplus } #endif #endif /* xtea.h */