include/crypto/internal/poly1305.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Common values for the Poly1305 algorithm
   4  */
   5
   6 #ifndef _CRYPTO_INTERNAL_POLY1305_H
   7 #define _CRYPTO_INTERNAL_POLY1305_H
   8
   9 #include <asm/unaligned.h>
  10 #include <linux/types.h>
  11 #include <crypto/poly1305.h>
  12
  13 /*
  14  * Poly1305 core functions.  These only accept whole blocks; the caller must
  15  * handle any needed block buffering and padding.  'hibit' must be 1 for any
  16  * full blocks, or 0 for the final block if it had to be padded.  If 'nonce' is
  17  * non-NULL, then it's added at the end to compute the Poly1305 MAC.  Otherwise,
  18  * only the ε-almost-∆-universal hash function (not the full MAC) is computed.
  19  */
  20
  21 void poly1305_core_setkey(struct poly1305_core_key *key, const u8 *raw_key);
  22 static inline void poly1305_core_init(struct poly1305_state *state)
  23 {
  24         *state = (struct poly1305_state){};
  25 }
  26
  27 void poly1305_core_blocks(struct poly1305_state *state,
  28                           const struct poly1305_core_key *key, const void *src,
  29                           unsigned int nblocks, u32 hibit);
  30 void poly1305_core_emit(const struct poly1305_state *state, const u32 nonce[4],
  31                         void *dst);
  32
  33 #endif