1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Common values for the Poly1305 algorithm
6 #ifndef _CRYPTO_POLY1305_H
7 #define _CRYPTO_POLY1305_H
9 #include <linux/types.h>
10 #include <linux/crypto.h>
12 #define POLY1305_BLOCK_SIZE 16
13 #define POLY1305_KEY_SIZE 32
14 #define POLY1305_DIGEST_SIZE 16
17 u32 r[5]; /* key, base 2^26 */
20 struct poly1305_state {
21 u32 h[5]; /* accumulator, base 2^26 */
24 struct poly1305_desc_ctx {
26 struct poly1305_key r;
30 struct poly1305_state h;
32 u8 buf[POLY1305_BLOCK_SIZE];
33 /* bytes used in partial buffer */
35 /* r key has been set */
37 /* s key has been set */
41 int crypto_poly1305_init(struct shash_desc *desc);
42 unsigned int crypto_poly1305_setdesckey(struct poly1305_desc_ctx *dctx,
43 const u8 *src, unsigned int srclen);
44 int crypto_poly1305_update(struct shash_desc *desc,
45 const u8 *src, unsigned int srclen);
46 int crypto_poly1305_final(struct shash_desc *desc, u8 *dst);