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- /**
- * \file arc4.h
- *
- * \brief The ARCFOUR stream cipher
- *
- * \warning ARC4 is considered a weak cipher and its use constitutes a
- * security risk. We recommend considering stronger ciphers instead.
- */
- /*
- * 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_ARC4_H
- #define MBEDTLS_ARC4_H
- #if !defined(MBEDTLS_CONFIG_FILE)
- #include "config.h"
- #else
- #include MBEDTLS_CONFIG_FILE
- #endif
- #include <stddef.h>
- /* MBEDTLS_ERR_ARC4_HW_ACCEL_FAILED is deprecated and should not be used. */
- #define MBEDTLS_ERR_ARC4_HW_ACCEL_FAILED -0x0019 /**< ARC4 hardware accelerator failed. */
- #ifdef __cplusplus
- extern "C" {
- #endif
- #if !defined(MBEDTLS_ARC4_ALT)
- // Regular implementation
- //
- /**
- * \brief ARC4 context structure
- *
- * \warning ARC4 is considered a weak cipher and its use constitutes a
- * security risk. We recommend considering stronger ciphers instead.
- *
- */
- typedef struct mbedtls_arc4_context
- {
- int x; /*!< permutation index */
- int y; /*!< permutation index */
- unsigned char m[256]; /*!< permutation table */
- }
- mbedtls_arc4_context;
- #else /* MBEDTLS_ARC4_ALT */
- #include "arc4_alt.h"
- #endif /* MBEDTLS_ARC4_ALT */
- /**
- * \brief Initialize ARC4 context
- *
- * \param ctx ARC4 context to be initialized
- *
- * \warning ARC4 is considered a weak cipher and its use constitutes a
- * security risk. We recommend considering stronger ciphers
- * instead.
- *
- */
- void mbedtls_arc4_init( mbedtls_arc4_context *ctx );
- /**
- * \brief Clear ARC4 context
- *
- * \param ctx ARC4 context to be cleared
- *
- * \warning ARC4 is considered a weak cipher and its use constitutes a
- * security risk. We recommend considering stronger ciphers
- * instead.
- *
- */
- void mbedtls_arc4_free( mbedtls_arc4_context *ctx );
- /**
- * \brief ARC4 key schedule
- *
- * \param ctx ARC4 context to be setup
- * \param key the secret key
- * \param keylen length of the key, in bytes
- *
- * \warning ARC4 is considered a weak cipher and its use constitutes a
- * security risk. We recommend considering stronger ciphers
- * instead.
- *
- */
- void mbedtls_arc4_setup( mbedtls_arc4_context *ctx, const unsigned char *key,
- unsigned int keylen );
- /**
- * \brief ARC4 cipher function
- *
- * \param ctx ARC4 context
- * \param length length of the input data
- * \param input buffer holding the input data
- * \param output buffer for the output data
- *
- * \return 0 if successful
- *
- * \warning ARC4 is considered a weak cipher and its use constitutes a
- * security risk. We recommend considering stronger ciphers
- * instead.
- *
- */
- int mbedtls_arc4_crypt( mbedtls_arc4_context *ctx, size_t length, const unsigned char *input,
- unsigned char *output );
- #if defined(MBEDTLS_SELF_TEST)
- /**
- * \brief Checkup routine
- *
- * \return 0 if successful, or 1 if the test failed
- *
- * \warning ARC4 is considered a weak cipher and its use constitutes a
- * security risk. We recommend considering stronger ciphers
- * instead.
- *
- */
- int mbedtls_arc4_self_test( int verbose );
- #endif /* MBEDTLS_SELF_TEST */
- #ifdef __cplusplus
- }
- #endif
- #endif /* arc4.h */
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