34 lines
1.3 KiB
C
34 lines
1.3 KiB
C
/* $OpenBSD: arc4.h,v 1.3 2007/09/11 12:07:05 djm Exp $ */
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/*
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* Copyright (c) 2003 Markus Friedl <markus@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#define RC4STATE 256
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#define RC4KEYLEN 16
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struct rc4_ctx {
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u_int8_t x, y;
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u_int8_t state[RC4STATE];
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};
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void rc4_keysetup(struct rc4_ctx *, u_char *, u_int32_t)
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__attribute__((__bounded__(__buffer__,2,3)));
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void rc4_crypt(struct rc4_ctx *, u_char *, u_char *, u_int32_t)
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__attribute__((__bounded__(__buffer__,2,4)))
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__attribute__((__bounded__(__buffer__,3,4)));
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void rc4_getbytes(struct rc4_ctx *, u_char *, u_int32_t)
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__attribute__((__bounded__(__buffer__,2,3)));
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void rc4_skip(struct rc4_ctx *, u_int32_t);
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