1 /* arcfour.h --- The arcfour stream cipher
2 * Copyright (C) 2000-2005, 2009-2011 Free Software Foundation, Inc.
4 * This file is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published
6 * by the Free Software Foundation; either version 2, or (at your
7 * option) any later version.
9 * This file is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this file; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 /* Code from Libgcrypt adapted for gnulib by Simon Josefsson. */
29 #define ARCFOUR_SBOX_SIZE 256
33 char sbox[ARCFOUR_SBOX_SIZE];
37 /* Apply ARCFOUR stream to INBUF placing the result in OUTBUF, both of
38 LENGTH size. CONTEXT must be initialized with arcfour_setkey
39 before this function is called. */
41 arcfour_stream (arcfour_context * context,
42 const char *inbuf, char *outbuf, size_t length);
44 /* Initialize CONTEXT using encryption KEY of KEYLEN bytes. KEY
45 should be 40 bits (5 bytes) or longer. The KEY cannot be zero
48 arcfour_setkey (arcfour_context * context, const char *key, size_t keylen);
50 #endif /* ARCFOUR_H */