internal-ascon.h

/*
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#ifndef LW_INTERNAL_ASCON_H
#define LW_INTERNAL_ASCON_H

#include "internal-util.h"

/**
 * \file internal-ascon.h
 * \brief Internal implementation of the ASCON permutation.
 *
 * References: http://competitions.cr.yp.to/round3/asconv12.pdf,
 * http://ascon.iaik.tugraz.at/
 */

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief Structure of the internal state of the ASCON permutation.
 */
typedef union
{
    uint64_t S[5];      /**< Words of the state */
    uint8_t B[40];      /**< Bytes of the state */

} ascon_state_t;

/**
 * \brief Permutes the ASCON state.
 *
 * \param state The ASCON state to be permuted.
 * \param first_round The first round (of 12) to be performed; 0, 4, or 6.
 *
 * The input and output \a state will be in big-endian byte order.
 */
void ascon_permute(ascon_state_t *state, uint8_t first_round);

#ifdef __cplusplus
}
#endif

#endif