140 lines
3.6 KiB
C
140 lines
3.6 KiB
C
/**
|
|
* \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. */
|
|
|
|
/* 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 */
|