1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * Common values for the Poly1305 algorithm
 4 */
 5
 6#ifndef _CRYPTO_POLY1305_H
 7#define _CRYPTO_POLY1305_H
 8
 9#include <linux/types.h>
10#include <linux/crypto.h>
11
12#define POLY1305_BLOCK_SIZE	16
13#define POLY1305_KEY_SIZE	32
14#define POLY1305_DIGEST_SIZE	16
15
16struct poly1305_key {
17	u32 r[5];	/* key, base 2^26 */
18};
19
20struct poly1305_state {
21	u32 h[5];	/* accumulator, base 2^26 */
22};
23
24struct poly1305_desc_ctx {
25	/* key */
26	struct poly1305_key r;
27	/* finalize key */
28	u32 s[4];
29	/* accumulator */
30	struct poly1305_state h;
31	/* partial buffer */
32	u8 buf[POLY1305_BLOCK_SIZE];
33	/* bytes used in partial buffer */
34	unsigned int buflen;
35	/* r key has been set */
36	bool rset;
37	/* s key has been set */
38	bool sset;
39};
40
41/*
42 * Poly1305 core functions.  These implement the ε-almost-∆-universal hash
43 * function underlying the Poly1305 MAC, i.e. they don't add an encrypted nonce
44 * ("s key") at the end.  They also only support block-aligned inputs.
45 */
46void poly1305_core_setkey(struct poly1305_key *key, const u8 *raw_key);
47static inline void poly1305_core_init(struct poly1305_state *state)
48{
49	memset(state->h, 0, sizeof(state->h));
50}
51void poly1305_core_blocks(struct poly1305_state *state,
52			  const struct poly1305_key *key,
53			  const void *src, unsigned int nblocks);
54void poly1305_core_emit(const struct poly1305_state *state, void *dst);
55
56/* Crypto API helper functions for the Poly1305 MAC */
57int crypto_poly1305_init(struct shash_desc *desc);
 
 
58unsigned int crypto_poly1305_setdesckey(struct poly1305_desc_ctx *dctx,
59					const u8 *src, unsigned int srclen);
60int crypto_poly1305_update(struct shash_desc *desc,
61			   const u8 *src, unsigned int srclen);
62int crypto_poly1305_final(struct shash_desc *desc, u8 *dst);
63
64#endif

 
 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