[398] | 1 | /**
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| 2 | * \file xtea.h
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| 3 | *
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| 4 | * \brief XTEA block cipher (32-bit)
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| 5 | */
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| 6 | /*
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| 7 | * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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| 8 | * SPDX-License-Identifier: Apache-2.0
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| 9 | *
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| 10 | * Licensed under the Apache License, Version 2.0 (the "License"); you may
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| 11 | * not use this file except in compliance with the License.
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| 12 | * You may obtain a copy of the License at
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| 13 | *
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| 14 | * http://www.apache.org/licenses/LICENSE-2.0
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| 15 | *
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| 16 | * Unless required by applicable law or agreed to in writing, software
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| 17 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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| 18 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 19 | * See the License for the specific language governing permissions and
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| 20 | * limitations under the License.
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| 21 | *
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| 22 | * This file is part of mbed TLS (https://tls.mbed.org)
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| 23 | */
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| 24 | #ifndef MBEDTLS_XTEA_H
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| 25 | #define MBEDTLS_XTEA_H
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| 26 |
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| 27 | #if !defined(MBEDTLS_CONFIG_FILE)
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| 28 | #include "config.h"
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| 29 | #else
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| 30 | #include MBEDTLS_CONFIG_FILE
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| 31 | #endif
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| 32 |
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| 33 | #include <stddef.h>
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| 34 | #include <stdint.h>
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| 35 |
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| 36 | #define MBEDTLS_XTEA_ENCRYPT 1
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| 37 | #define MBEDTLS_XTEA_DECRYPT 0
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| 38 |
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| 39 | #define MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH -0x0028 /**< The data input has an invalid length. */
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| 40 |
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| 41 | /* MBEDTLS_ERR_XTEA_HW_ACCEL_FAILED is deprecated and should not be used. */
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| 42 | #define MBEDTLS_ERR_XTEA_HW_ACCEL_FAILED -0x0029 /**< XTEA hardware accelerator failed. */
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| 43 |
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| 44 | #ifdef __cplusplus
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| 45 | extern "C" {
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| 46 | #endif
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| 47 |
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| 48 | #if !defined(MBEDTLS_XTEA_ALT)
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| 49 | // Regular implementation
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| 50 | //
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| 51 |
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| 52 | /**
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| 53 | * \brief XTEA context structure
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| 54 | */
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| 55 | typedef struct mbedtls_xtea_context
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| 56 | {
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| 57 | uint32_t k[4]; /*!< key */
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| 58 | }
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| 59 | mbedtls_xtea_context;
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| 60 |
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| 61 | #else /* MBEDTLS_XTEA_ALT */
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| 62 | #include "xtea_alt.h"
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| 63 | #endif /* MBEDTLS_XTEA_ALT */
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| 64 |
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| 65 | /**
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| 66 | * \brief Initialize XTEA context
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| 67 | *
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| 68 | * \param ctx XTEA context to be initialized
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| 69 | */
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| 70 | void mbedtls_xtea_init( mbedtls_xtea_context *ctx );
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| 71 |
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| 72 | /**
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| 73 | * \brief Clear XTEA context
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| 74 | *
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| 75 | * \param ctx XTEA context to be cleared
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| 76 | */
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| 77 | void mbedtls_xtea_free( mbedtls_xtea_context *ctx );
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| 78 |
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| 79 | /**
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| 80 | * \brief XTEA key schedule
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| 81 | *
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| 82 | * \param ctx XTEA context to be initialized
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| 83 | * \param key the secret key
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| 84 | */
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| 85 | void mbedtls_xtea_setup( mbedtls_xtea_context *ctx, const unsigned char key[16] );
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| 86 |
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| 87 | /**
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| 88 | * \brief XTEA cipher function
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| 89 | *
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| 90 | * \param ctx XTEA context
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| 91 | * \param mode MBEDTLS_XTEA_ENCRYPT or MBEDTLS_XTEA_DECRYPT
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| 92 | * \param input 8-byte input block
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| 93 | * \param output 8-byte output block
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| 94 | *
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| 95 | * \return 0 if successful
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| 96 | */
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| 97 | int mbedtls_xtea_crypt_ecb( mbedtls_xtea_context *ctx,
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| 98 | int mode,
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| 99 | const unsigned char input[8],
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| 100 | unsigned char output[8] );
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| 101 |
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| 102 | #if defined(MBEDTLS_CIPHER_MODE_CBC)
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| 103 | /**
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| 104 | * \brief XTEA CBC cipher function
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| 105 | *
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| 106 | * \param ctx XTEA context
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| 107 | * \param mode MBEDTLS_XTEA_ENCRYPT or MBEDTLS_XTEA_DECRYPT
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| 108 | * \param length the length of input, multiple of 8
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| 109 | * \param iv initialization vector for CBC mode
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| 110 | * \param input input block
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| 111 | * \param output output block
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| 112 | *
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| 113 | * \return 0 if successful,
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| 114 | * MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH if the length % 8 != 0
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| 115 | */
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| 116 | int mbedtls_xtea_crypt_cbc( mbedtls_xtea_context *ctx,
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| 117 | int mode,
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| 118 | size_t length,
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| 119 | unsigned char iv[8],
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| 120 | const unsigned char *input,
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| 121 | unsigned char *output);
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| 122 | #endif /* MBEDTLS_CIPHER_MODE_CBC */
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| 123 |
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| 124 | #if defined(MBEDTLS_SELF_TEST)
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| 125 |
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| 126 | /**
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| 127 | * \brief Checkup routine
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| 128 | *
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| 129 | * \return 0 if successful, or 1 if the test failed
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| 130 | */
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| 131 | int mbedtls_xtea_self_test( int verbose );
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| 132 |
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| 133 | #endif /* MBEDTLS_SELF_TEST */
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| 134 |
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| 135 | #ifdef __cplusplus
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| 136 | }
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| 137 | #endif
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| 138 |
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| 139 | #endif /* xtea.h */
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