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81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/**
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* \file arc4.h
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*
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* \brief The ARCFOUR stream cipher
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*
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* Copyright (C) 2006-2010, Brainspark B.V.
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*
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* This file is part of PolarSSL (http://www.polarssl.org)
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* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef POLARSSL_ARC4_H
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#define POLARSSL_ARC4_H
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#include <string.h>
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/**
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* \brief ARC4 context structure
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*/
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typedef struct
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{
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int x; /*!< permutation index */
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int y; /*!< permutation index */
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unsigned char m[256]; /*!< permutation table */
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}
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arc4_context;
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \brief ARC4 key schedule
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*
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* \param ctx ARC4 context to be initialized
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* \param key the secret key
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* \param keylen length of the key
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*/
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void arc4_setup( arc4_context *ctx, const unsigned char *key, unsigned int keylen );
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/**
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* \brief ARC4 cipher function
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*
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* \param ctx ARC4 context
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* \param length length of the input data
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* \param input buffer holding the input data
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* \param output buffer for the output data
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*
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* \return 0 if successful
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*/
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int arc4_crypt( arc4_context *ctx, size_t length, const unsigned char *input,
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unsigned char *output );
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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 arc4_self_test( int verbose );
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#ifdef __cplusplus
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}
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#endif
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#endif /* arc4.h */
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