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-/*! \file rc4.h
-    \brief Header file for RC4 stream cipher routines
-         \author Damien Miller <djm@mindrot.org>
-         \version 0.0.0
-         \date 1999
-         
-         A simple implementation of the RC4 stream cipher, based on the
-         description given in _Bruce Schneier's_ "Applied Cryptography"
-         2nd edition.
-
-         Copyright 1999 Damien Miller
-
-         Permission is hereby granted, free of charge, to any person
-         obtaining a copy of this software and associated documentation
-         files (the "Software"), to deal in the Software without
-         restriction, including without limitation the rights to use, copy,
-         modify, merge, publish, distribute, sublicense, and/or sell copies
-         of the Software, and to permit persons to whom the Software is
-         furnished to do so, subject to the following conditions:
-
-         The above copyright notice and this permission notice shall be
-         included in all copies or substantial portions of the Software.
-
-         THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
-         KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
-         WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
-         AND NONINFRINGEMENT.  IN NO EVENT SHALL DAMIEN MILLER BE LIABLE
-         FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
-         CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-         WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-         \warning None of these functions clears its memory after use. It
-         \warning is the responsability of the calling routines to ensure
-         \warning that any sensitive data (keystream, key or plaintext) is
-         \warning properly erased after use.
-         
-         \warning The name "RC4" is trademarked in the United States, 
-         \warning you may need to use "RC4 compatible" or "ARC4" 
-         \warning (Alleged RC4).
-*/
-
-/* $Id: rc4.h,v 1.1.1.1 1999/10/26 05:48:13 damien Exp $ */
-
-#ifndef _RC4_H
-#define _RC4_H
-
-#include "config.h"
-#ifndef HAVE_ARC4RANDOM
-
-/*! \struct rc4_t
-    \brief RC4 stream cipher state object
-         \var s State array
-         \var i Monotonic index
-         \var j Randomised index
-         
-         \warning This structure should not be accessed directly. To
-         \warning initialise a rc4_t object, you should use the rc4_key()
-         \warning function
-         
-         This structure holds the current state of the RC4 algorithm.
-*/
-typedef struct
-{
-        unsigned int s[256];
-        int i;
-        int j;
-} rc4_t;
-
-/*! \fn void rc4_key(rc4_t *r, unsigned char *key, int len);
-    \brief Set up key structure of RC4 stream cipher
-         \param r pointer to RC4 structure to be seeded
-         \param key pointer to buffer containing raw key
-         \param len length of key
-         
-         This function set the internal state of the RC4 data structure
-         pointed to by \a r using the specified \a key of length \a len.
-         
-         This function can use up to 256 bytes of key, any more are ignored.
-         
-         \warning Stream ciphers (such as RC4) can be insecure if the same
-         \warning key is used repeatedly. Ensure that any key specified has
-         \warning an reasonably sized Initialisation Vector component.
-*/
-void rc4_key(rc4_t *r, unsigned char *key, int len);
-
-/*! \fn rc4_crypt(rc4_t *r, unsigned char *plaintext, int len);
-    \brief Crypt bytes using RC4 algorithm
-         \param r pointer to RC4 structure to be used
-         \param plaintext Pointer to bytes to encrypt
-         \param len number of bytes to crypt
-
-         This function encrypts one or more bytes (pointed to by \a plaintext)
-         using the RC4 algorithm. \a r is a state structure that must be 
-         initialiased using the rc4_key() function prior to use.
-         
-         Since RC4 XORs each byte of plaintext with a byte of keystream,
-         this function can be used for both encryption and decryption.
-*/
-void rc4_crypt(rc4_t *r, unsigned char *plaintext, int len);
-
-/*! \fn rc4_getbytes(rc4_t *r, unsigned char *buffer, int len);
-    \brief Generate key stream using the RC4 stream cipher
-         \param r pointer to RC4 structure to be used
-         \param buffer pointer to buffer in which to deposit keystream
-         \param len number of bytes to deposit
-
-         This function gives access to the raw RC4 key stream. In this 
-         consiguration RC4 can be used as a fast, strong pseudo-random 
-         number generator with a very long period.
-*/
-void rc4_getbytes(rc4_t *r, unsigned char *buffer, int len);
-
-#endif /* !HAVE_ARC4RANDOM */
-
-#endif /* _RC4_H */