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 
15 struct chacha20_ctx {
16 	u32 key[8];
17 };
18 
19 void crypto_chacha20_init(u32 *state, struct chacha20_ctx *ctx, u8 *iv);
20 int crypto_chacha20_setkey(struct crypto_tfm *tfm, const u8 *key,
21 			   unsigned int keysize);
22 int crypto_chacha20_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
23 			  struct scatterlist *src, unsigned int nbytes);
24 
25 #endif
26