ascon-x2-c64.c File Reference

#include "ascon-masked-state.h"
#include "ascon-masked-backend.h"
#include "core/ascon-util.h"

Go to the source code of this file.

Macros
#define	and_not_xor(x, y, z)
	Computes x ^= (~y & z) with a 2-share masked representation. More...
#define	ROUND_CONSTANT(round)    (~(uint64_t)(((0x0F - (round)) << 4) | (round)))

Functions
void	ascon_x2_permute (ascon_masked_state_t *state, uint8_t first_round, uint64_t *preserve)
	Permutes the ASCON-x2 state with a specified number of rounds. More...

Macro Definition Documentation

and_not_xor

#define and_not_xor	(		x,
			y,
			z
	)

Value:

    do { \
        x##_a ^= ((~y##_a) & ascon_mask64_unrotate_share1_0(z##_b)); \
        x##_a ^= ((~y##_a) & z##_a); \
        x##_b ^= (y##_b & z##_b); \
        x##_b ^= (y##_b & ascon_mask64_rotate_share1_0(z##_a)); \
    } while (0)

Computes x ^= (~y & z) with a 2-share masked representation.

Parameters

x	Output variable to XOR with.
y	First input variable.
z	Second input variable.

Definition at line 36 of file ascon-x2-c64.c.

ROUND_CONSTANT

#define ROUND_CONSTANT

(

round

)

(~(uint64_t)(((0x0F - (round)) << 4) | (round)))

Definition at line 46 of file ascon-x2-c64.c.

Function Documentation

ascon_x2_permute()

void ascon_x2_permute	(	ascon_masked_state_t *	state,
		uint8_t	first_round,
		uint64_t *	preserve
	)

Permutes the ASCON-x2 state with a specified number of rounds.

Parameters

state	The ASCON-x2 state in "operational" form.
first_round	The first round to execute, between 0 and 11. The number of rounds will be 12 - first_round.
preserve	Preserved randomness from the previous permutation operation, or a fresh random word if randomness should not be preserved.

Definition at line 49 of file ascon-x2-c64.c.