// Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) All rights reserved.
// SPDX-License-Identifier: Apache-2.0

#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 OPENSSL_DEPRECATED const char *RC4_options(void);


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

#endif  // OPENSSL_HEADER_RC4_H