chacha20.h

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/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 *
 *  This file is provided under the Apache License 2.0, or the
 *  GNU General Public License v2.0 or later.
 *
 *  **********
 *  Apache License 2.0:
 *
 *  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
 *
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 *  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
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 *  **********
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 *  **********
 *  GNU General Public License v2.0 or later:
 *
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 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
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#ifndef MBEDTLS_CHACHA20_H
#define MBEDTLS_CHACHA20_H

#if !defined(MBEDTLS_CONFIG_FILE)
#include "config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif

#include <stdint.h>
#include <stddef.h>

#define MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA         -0x0051 
/* MBEDTLS_ERR_CHACHA20_FEATURE_UNAVAILABLE is deprecated and should not be
 * used. */
#define MBEDTLS_ERR_CHACHA20_FEATURE_UNAVAILABLE    -0x0053 
/* MBEDTLS_ERR_CHACHA20_HW_ACCEL_FAILED is deprecated and should not be used.
 */
#define MBEDTLS_ERR_CHACHA20_HW_ACCEL_FAILED        -0x0055  
#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_CHACHA20_ALT)

typedef struct mbedtls_chacha20_context
{
    uint32_t state[16];          
    uint8_t  keystream8[64];     
    size_t keystream_bytes_used; 
}
mbedtls_chacha20_context;

#else  /* MBEDTLS_CHACHA20_ALT */