| /** |
| * \file xtea.h |
| * |
| * \brief XTEA block cipher (32-bit) |
| * |
| * 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_XTEA_H |
| #define MBEDTLS_XTEA_H |
| |
| #if !defined(MBEDTLS_CONFIG_FILE) |
| #include "config.h" |
| #else |
| #include MBEDTLS_CONFIG_FILE |
| #endif |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #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. */ |
| |
| #if !defined(MBEDTLS_XTEA_ALT) |
| // Regular implementation |
| // |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** |
| * \brief XTEA context structure |
| */ |
| typedef struct |
| { |
| uint32_t k[4]; /*!< key */ |
| } |
| mbedtls_xtea_context; |
| |
| /** |
| * \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 */ |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #else /* MBEDTLS_XTEA_ALT */ |
| #include "xtea_alt.h" |
| #endif /* MBEDTLS_XTEA_ALT */ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** |
| * \brief Checkup routine |
| * |
| * \return 0 if successful, or 1 if the test failed |
| */ |
| int mbedtls_xtea_self_test( int verbose ); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* xtea.h */ |