80 lines
1.9 KiB
C
80 lines
1.9 KiB
C
/* arcfour.h
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The arcfour/rc4 stream cipher.
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Copyright (C) 2001, 2014 Niels Möller
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This file is part of GNU Nettle.
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GNU Nettle is free software: you can redistribute it and/or
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modify it under the terms of either:
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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or both in parallel, as here.
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GNU Nettle 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 GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see http://www.gnu.org/licenses/.
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*/
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#ifndef NETTLE_ARCFOUR_H_INCLUDED
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#define NETTLE_ARCFOUR_H_INCLUDED
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#include "nettle-types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Name mangling */
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#define arcfour128_set_key nettle_arcfour128_set_key
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#define arcfour_set_key nettle_arcfour_set_key
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#define arcfour_crypt nettle_arcfour_crypt
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/* Minimum and maximum keysizes, and a reasonable default. In
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* octets.*/
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#define ARCFOUR_MIN_KEY_SIZE 1
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#define ARCFOUR_MAX_KEY_SIZE 256
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#define ARCFOUR_KEY_SIZE 16
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#define ARCFOUR128_KEY_SIZE 16
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struct arcfour_ctx
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{
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uint8_t S[256];
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uint8_t i;
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uint8_t j;
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};
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void
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arcfour_set_key(struct arcfour_ctx *ctx,
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size_t length, const uint8_t *key);
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void
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arcfour128_set_key(struct arcfour_ctx *ctx, const uint8_t *key);
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void
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arcfour_crypt(struct arcfour_ctx *ctx,
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size_t length, uint8_t *dst,
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const uint8_t *src);
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#ifdef __cplusplus
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}
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#endif
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#endif /* NETTLE_ARCFOUR_H_INCLUDED */
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