/* arc4.h

*

* Copyright (C) 2006-2025 wolfSSL Inc.

*

* This file is part of wolfSSL.

*

* wolfSSL is free software; you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation; either version 3 of the License, or

* (at your option) any later version.

*

* wolfSSL 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 General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program; if not, write to the Free Software

* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA

*/

/*!

\file wolfssl/wolfcrypt/arc4.h

*/

#ifndef WOLF_CRYPT_ARC4_H

#define WOLF_CRYPT_ARC4_H

#include <wolfssl/wolfcrypt/types.h>

#ifdef __cplusplus

extern "C" {

#endif

#ifdef WOLFSSL_ASYNC_CRYPT

#include <wolfssl/wolfcrypt/async.h>

#endif

enum {

ARC4_ENC_TYPE = 4, /* cipher unique type */

ARC4_STATE_SIZE = 256,

RC4_KEY_SIZE = 16 /* always 128bit */

};

/* ARC4 encryption and decryption */

typedef struct Arc4 {

byte x;

byte y;

byte state[ARC4_STATE_SIZE];

#ifdef WOLFSSL_ASYNC_CRYPT

WC_ASYNC_DEV asyncDev;

#endif

void* heap;

} Arc4;

WOLFSSL_API int wc_Arc4Process(Arc4* arc4, byte* out, const byte* in,

word32 length);

WOLFSSL_API int wc_Arc4SetKey(Arc4* arc4, const byte* key, word32 length);

WOLFSSL_API int wc_Arc4Init(Arc4* arc4, void* heap, int devId);

WOLFSSL_API void wc_Arc4Free(Arc4* arc4);

#ifdef __cplusplus

} /* extern "C" */

#endif

#endif /* WOLF_CRYPT_ARC4_H */