1/*
 2 * Common values for the ChaCha20 algorithm
 3 */
 4
 5#ifndef _CRYPTO_CHACHA20_H
 6#define _CRYPTO_CHACHA20_H
 7
 8#include <linux/types.h>
 9#include <linux/crypto.h>
10
11#define CHACHA20_IV_SIZE	16
12#define CHACHA20_KEY_SIZE	32
13#define CHACHA20_BLOCK_SIZE	64
14
15struct chacha20_ctx {
16	u32 key[8];
17};
18
19void chacha20_block(u32 *state, void *stream);
20void crypto_chacha20_init(u32 *state, struct chacha20_ctx *ctx, u8 *iv);
21int crypto_chacha20_setkey(struct crypto_tfm *tfm, const u8 *key,
22			   unsigned int keysize);
23int crypto_chacha20_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
24			  struct scatterlist *src, unsigned int nbytes);
25
26#endif