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[mirror_ubuntu-artful-kernel.git] / include / crypto / poly1305.h
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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