| /* arcfour.h --- The arcfour stream cipher | |
| * Copyright (C) 2000-2005, 2009-2025 Free Software Foundation, Inc. | |
| * | |
| * This file is free software: you can redistribute it and/or modify | |
| * it under the terms of the GNU Lesser General Public License as | |
| * published by the Free Software Foundation; either version 2.1 of the | |
| * License, or (at your option) any later version. | |
| * | |
| * This file is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| * GNU Lesser General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU Lesser General Public License | |
| * along with this program. If not, see <https://www.gnu.org/licenses/>. | |
| * | |
| */ | |
| /* Code from Libgcrypt adapted for gnulib by Simon Josefsson. */ | |
| extern "C" { | |
| typedef struct | |
| { | |
| char sbox[ARCFOUR_SBOX_SIZE]; | |
| uint8_t idx_i, idx_j; | |
| } arcfour_context; | |
| /* Apply ARCFOUR stream to INBUF placing the result in OUTBUF, both of | |
| LENGTH size. CONTEXT must be initialized with arcfour_setkey | |
| before this function is called. */ | |
| extern void | |
| arcfour_stream (arcfour_context * context, | |
| const char *inbuf, char *restrict outbuf, size_t length); | |
| /* Initialize CONTEXT using encryption KEY of KEYLEN bytes. KEY | |
| should be 40 bits (5 bytes) or longer. The KEY cannot be zero | |
| length. */ | |
| extern void | |
| arcfour_setkey (arcfour_context * context, const char *key, size_t keylen); | |
| } | |