1/*
 2 * Common values for the Poly1305 algorithm
 3 */
 4
 5#ifndef _CRYPTO_POLY1305_H
 6#define _CRYPTO_POLY1305_H
 7
 8#include <linux/types.h>
 9#include <linux/crypto.h>
10
11#define POLY1305_BLOCK_SIZE	16
12#define POLY1305_KEY_SIZE	32
13#define POLY1305_DIGEST_SIZE	16
14
15struct poly1305_desc_ctx {
16	/* key */
17	u32 r[5];
18	/* finalize key */
19	u32 s[4];
20	/* accumulator */
21	u32 h[5];
22	/* partial buffer */
23	u8 buf[POLY1305_BLOCK_SIZE];
24	/* bytes used in partial buffer */
25	unsigned int buflen;
26	/* r key has been set */
27	bool rset;
28	/* s key has been set */
29	bool sset;
30};
31
32int crypto_poly1305_init(struct shash_desc *desc);
33int crypto_poly1305_setkey(struct crypto_shash *tfm,
34			   const u8 *key, unsigned int keylen);
35unsigned int crypto_poly1305_setdesckey(struct poly1305_desc_ctx *dctx,
36					const u8 *src, unsigned int srclen);
37int crypto_poly1305_update(struct shash_desc *desc,
38			   const u8 *src, unsigned int srclen);
39int crypto_poly1305_final(struct shash_desc *desc, u8 *dst);
40
41#endif