linux/include/crypto/poly1305.h
Martin Willi 2546f811ef crypto: poly1305 - Export common Poly1305 helpers
As architecture specific drivers need a software fallback, export Poly1305
init/update/final functions together with some helpers in a header file.

Signed-off-by: Martin Willi <martin@strongswan.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-07-17 21:20:26 +08:00

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C

/*
* Common values for the Poly1305 algorithm
*/
#ifndef _CRYPTO_POLY1305_H
#define _CRYPTO_POLY1305_H
#include <linux/types.h>
#include <linux/crypto.h>
#define POLY1305_BLOCK_SIZE 16
#define POLY1305_KEY_SIZE 32
#define POLY1305_DIGEST_SIZE 16
struct poly1305_desc_ctx {
/* key */
u32 r[5];
/* finalize key */
u32 s[4];
/* accumulator */
u32 h[5];
/* partial buffer */
u8 buf[POLY1305_BLOCK_SIZE];
/* bytes used in partial buffer */
unsigned int buflen;
/* r key has been set */
bool rset;
/* s key has been set */
bool sset;
};
int crypto_poly1305_init(struct shash_desc *desc);
int crypto_poly1305_setkey(struct crypto_shash *tfm,
const u8 *key, unsigned int keylen);
unsigned int crypto_poly1305_setdesckey(struct poly1305_desc_ctx *dctx,
const u8 *src, unsigned int srclen);
int crypto_poly1305_update(struct shash_desc *desc,
const u8 *src, unsigned int srclen);
int crypto_poly1305_final(struct shash_desc *desc, u8 *dst);
#endif