/usr/include/mbedtls/xtea.h is in libmbedtls-dev 2.8.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 | /**
* \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. */
#define MBEDTLS_ERR_XTEA_HW_ACCEL_FAILED -0x0029 /**< XTEA hardware accelerator failed. */
#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 */
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