include/openssl/rc4.h

/*
 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#ifndef OPENSSL_HEADER_RC4_H
#define OPENSSL_HEADER_RC4_H

#include <openssl/base.h>

#if defined(__cplusplus)
extern "C" {
#endif


// RC4.


struct rc4_key_st {
  uint32_t x, y;
  uint32_t data[256];
} /* RC4_KEY */;

// RC4_set_key performs an RC4 key schedule and initialises |rc4key| with |len|
// bytes of key material from |key|.
OPENSSL_EXPORT void RC4_set_key(RC4_KEY *rc4key, unsigned len,
                                const uint8_t *key);

// RC4 encrypts (or decrypts, it's the same with RC4) |len| bytes from |in| to
// |out|.
OPENSSL_EXPORT void RC4(RC4_KEY *key, size_t len, const uint8_t *in,
                        uint8_t *out);


// Deprecated functions.

// RC4_options returns the string "rc4(ptr,int)".
OPENSSL_EXPORT const char *RC4_options(void);


#if defined(__cplusplus)
}  // extern C
#endif

#endif  // OPENSSL_HEADER_RC4_H