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51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* arcfour.h --- The arcfour stream cipher
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* Copyright (C) 2000-2005, 2009-2011 Free Software Foundation, Inc.
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*
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* This file 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
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* by the Free Software Foundation; either version 2, or (at your
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* option) any later version.
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*
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* This file is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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
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* along with this file; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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*/
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/* Code from Libgcrypt adapted for gnulib by Simon Josefsson. */
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#ifndef ARCFOUR_H
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# define ARCFOUR_H
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# include <stddef.h>
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# include <stdint.h>
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#define ARCFOUR_SBOX_SIZE 256
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typedef struct
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{
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char sbox[ARCFOUR_SBOX_SIZE];
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uint8_t idx_i, idx_j;
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} arcfour_context;
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/* Apply ARCFOUR stream to INBUF placing the result in OUTBUF, both of
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LENGTH size. CONTEXT must be initialized with arcfour_setkey
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before this function is called. */
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extern void
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arcfour_stream (arcfour_context * context,
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const char *inbuf, char *outbuf, size_t length);
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/* Initialize CONTEXT using encryption KEY of KEYLEN bytes. KEY
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should be 40 bits (5 bytes) or longer. The KEY cannot be zero
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length. */
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extern void
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arcfour_setkey (arcfour_context * context, const char *key, size_t keylen);
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#endif /* ARCFOUR_H */
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