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,
22 			  const u8 raw_key[POLY1305_BLOCK_SIZE]);
23 static inline void poly1305_core_init(struct poly1305_state *state)
24 {
25 	*state = (struct poly1305_state){};
26 }
27 
28 void poly1305_core_blocks(struct poly1305_state *state,
29 			  const struct poly1305_core_key *key, const void *src,
30 			  unsigned int nblocks, u32 hibit);
31 void poly1305_core_emit(const struct poly1305_state *state, const u32 nonce[4],
32 			void *dst);
33 
34 #endif
35