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 
18 struct chacha20_ctx {
19 	u32 key[8];
20 };
21 
22 void chacha20_block(u32 *state, u32 *stream);
23 void crypto_chacha20_init(u32 *state, struct chacha20_ctx *ctx, u8 *iv);
24 int crypto_chacha20_setkey(struct crypto_skcipher *tfm, const u8 *key,
25 			   unsigned int keysize);
26 int crypto_chacha20_crypt(struct skcipher_request *req);
27 
28 #endif
29