1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * Common values for the ChaCha20 algorithm
 4 */
 5
 6#ifndef _CRYPTO_CHACHA20_H
 7#define _CRYPTO_CHACHA20_H
 8
 9#include <crypto/skcipher.h>
10#include <linux/types.h>
11#include <linux/crypto.h>
12
13#define CHACHA20_IV_SIZE	16
14#define CHACHA20_KEY_SIZE	32
15#define CHACHA20_BLOCK_SIZE	64
16#define CHACHA20_BLOCK_WORDS	(CHACHA20_BLOCK_SIZE / sizeof(u32))
17
18struct chacha20_ctx {
19	u32 key[8];
20};
21
22void chacha20_block(u32 *state, u32 *stream);
23void crypto_chacha20_init(u32 *state, struct chacha20_ctx *ctx, u8 *iv);
24int crypto_chacha20_setkey(struct crypto_skcipher *tfm, const u8 *key,
25			   unsigned int keysize);
26int crypto_chacha20_crypt(struct skcipher_request *req);
27
28#endif