include/crypto/poly1305.h

   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