/** * \file arc4.h * * Copyright (C) 2006-2009, Paul Bakker * All rights reserved. * * Joined copyright on original XySSL code with: Christophe Devine * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #ifndef POLARSSL_ARC4_H #define POLARSSL_ARC4_H /** * \brief ARC4 context structure */ typedef struct { int x; /*!< permutation index */ int y; /*!< permutation index */ unsigned char m[256]; /*!< permutation table */ } arc4_context; #ifdef __cplusplus extern "C" { #endif /** * \brief ARC4 key schedule * * \param ctx ARC4 context to be initialized * \param key the secret key * \param keylen length of the key */ void arc4_setup( arc4_context *ctx, const unsigned char *key, int keylen ); /** * \brief ARC4 cipher function * * \param ctx ARC4 context * \param buf buffer to be processed * \param buflen amount of data in buf */ void arc4_crypt( arc4_context *ctx, unsigned char *buf, int buflen ); /* * \brief Checkup routine * * \return 0 if successful, or 1 if the test failed */ int arc4_self_test( int verbose ); #ifdef __cplusplus } #endif #endif /* arc4.h */