/* 
 *   Copyright 2014-2021 The GmSSL Project Authors. All Rights Reserved.
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */


#ifndef GMSSL_RC4_H
#define GMSSL_RC4_H


#include <string.h>
#include <stdint.h>


#ifdef __cplusplus
extern "C" {
#endif


#define RC4_MIN_KEY_BITS	40
#define RC4_STATE_NUM_WORDS	256


typedef struct {
	unsigned char d[256];
} RC4_STATE;

void rc4_set_key(RC4_STATE *state, const uint8_t *key, size_t keylen);
void rc4_generate_keystream(RC4_STATE *state, size_t outlen, uint8_t *out);


#ifdef __cplusplus
}
#endif
#endif