140 lines
3.6 KiB
C
140 lines
3.6 KiB
C
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/**
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* \file xtea.h
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*
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* \brief XTEA block cipher (32-bit)
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*/
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/*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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#ifndef MBEDTLS_XTEA_H
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#define MBEDTLS_XTEA_H
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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#include <stddef.h>
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#include <stdint.h>
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#define MBEDTLS_XTEA_ENCRYPT 1
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#define MBEDTLS_XTEA_DECRYPT 0
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#define MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH -0x0028 /**< The data input has an invalid length. */
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/* MBEDTLS_ERR_XTEA_HW_ACCEL_FAILED is deprecated and should not be used. */
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#define MBEDTLS_ERR_XTEA_HW_ACCEL_FAILED -0x0029 /**< XTEA hardware accelerator failed. */
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if !defined(MBEDTLS_XTEA_ALT)
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// Regular implementation
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//
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/**
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* \brief XTEA context structure
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*/
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typedef struct mbedtls_xtea_context
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{
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uint32_t k[4]; /*!< key */
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}
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mbedtls_xtea_context;
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#else /* MBEDTLS_XTEA_ALT */
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#include "xtea_alt.h"
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#endif /* MBEDTLS_XTEA_ALT */
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/**
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* \brief Initialize XTEA context
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*
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* \param ctx XTEA context to be initialized
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*/
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void mbedtls_xtea_init( mbedtls_xtea_context *ctx );
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/**
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* \brief Clear XTEA context
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*
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* \param ctx XTEA context to be cleared
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*/
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void mbedtls_xtea_free( mbedtls_xtea_context *ctx );
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/**
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* \brief XTEA key schedule
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*
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* \param ctx XTEA context to be initialized
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* \param key the secret key
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*/
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void mbedtls_xtea_setup( mbedtls_xtea_context *ctx, const unsigned char key[16] );
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/**
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* \brief XTEA cipher function
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*
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* \param ctx XTEA context
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* \param mode MBEDTLS_XTEA_ENCRYPT or MBEDTLS_XTEA_DECRYPT
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* \param input 8-byte input block
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* \param output 8-byte output block
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*
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* \return 0 if successful
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*/
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int mbedtls_xtea_crypt_ecb( mbedtls_xtea_context *ctx,
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int mode,
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const unsigned char input[8],
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unsigned char output[8] );
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#if defined(MBEDTLS_CIPHER_MODE_CBC)
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/**
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* \brief XTEA CBC cipher function
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*
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* \param ctx XTEA context
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* \param mode MBEDTLS_XTEA_ENCRYPT or MBEDTLS_XTEA_DECRYPT
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* \param length the length of input, multiple of 8
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* \param iv initialization vector for CBC mode
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* \param input input block
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* \param output output block
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*
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* \return 0 if successful,
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* MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH if the length % 8 != 0
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*/
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int mbedtls_xtea_crypt_cbc( mbedtls_xtea_context *ctx,
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int mode,
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size_t length,
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unsigned char iv[8],
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const unsigned char *input,
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unsigned char *output);
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#endif /* MBEDTLS_CIPHER_MODE_CBC */
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#if defined(MBEDTLS_SELF_TEST)
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/**
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* \brief Checkup routine
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*
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* \return 0 if successful, or 1 if the test failed
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*/
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int mbedtls_xtea_self_test( int verbose );
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#endif /* MBEDTLS_SELF_TEST */
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#ifdef __cplusplus
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}
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#endif
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#endif /* xtea.h */
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