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 15 struct 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 32 int crypto_poly1305_init(struct shash_desc *desc); 33 int crypto_poly1305_setkey(struct crypto_shash *tfm, 34 const u8 *key, unsigned int keylen); 35 unsigned int crypto_poly1305_setdesckey(struct poly1305_desc_ctx *dctx, 36 const u8 *src, unsigned int srclen); 37 int crypto_poly1305_update(struct shash_desc *desc, 38 const u8 *src, unsigned int srclen); 39 int crypto_poly1305_final(struct shash_desc *desc, u8 *dst); 40 41 #endif 42