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 16 struct poly1305_desc_ctx { 17 /* key */ 18 u32 r[5]; 19 /* finalize key */ 20 u32 s[4]; 21 /* accumulator */ 22 u32 h[5]; 23 /* partial buffer */ 24 u8 buf[POLY1305_BLOCK_SIZE]; 25 /* bytes used in partial buffer */ 26 unsigned int buflen; 27 /* r key has been set */ 28 bool rset; 29 /* s key has been set */ 30 bool sset; 31 }; 32 33 int crypto_poly1305_init(struct shash_desc *desc); 34 unsigned int crypto_poly1305_setdesckey(struct poly1305_desc_ctx *dctx, 35 const u8 *src, unsigned int srclen); 36 int crypto_poly1305_update(struct shash_desc *desc, 37 const u8 *src, unsigned int srclen); 38 int crypto_poly1305_final(struct shash_desc *desc, u8 *dst); 39 40 #endif 41