pqcrypto/crypto_sign/sphincs-shake256-256f-robust/avx2/utilsx4.h

#ifndef PQCLEAN_SPHINCSSHAKE256256FROBUST_AVX2_UTILSX4_H
#define PQCLEAN_SPHINCSSHAKE256256FROBUST_AVX2_UTILSX4_H

#include "hash_state.h"
#include "params.h"

#include <stdint.h>

/**
 * For a given leaf index, computes the authentication path and the resulting
 * root node using Merkle's TreeHash algorithm.
 * Expects the layer and tree parts of the tree_addr to be set, as well as the
 * tree type (i.e. PQCLEAN_SPHINCSSHAKE256256FROBUST_AVX2_ADDR_TYPE_HASHTREE or PQCLEAN_SPHINCSSHAKE256256FROBUST_AVX2_ADDR_TYPE_FORSTREE).
 * Applies the offset idx_offset to indices before building addresses, so that
 * it is possible to continue counting indices across trees.
 */
void PQCLEAN_SPHINCSSHAKE256256FROBUST_AVX2_treehashx4_FORS_HEIGHT(unsigned char *rootx4,
        unsigned char *auth_pathx4,
        const unsigned char *sk_seed,
        const unsigned char *pub_seed,
        const uint32_t leaf_idx[4],
        uint32_t idx_offset[4],
        void (*gen_leafx4)(unsigned char * /* leaf0 */,
                           unsigned char * /* leaf1 */,
                           unsigned char * /* leaf2 */,
                           unsigned char * /* leaf3 */,
                           const unsigned char * /* sk_seed */,
                           const unsigned char * /* pub_seed */,
                           uint32_t /* addr_idx0 */,
                           uint32_t /* addr_idx1 */,
                           uint32_t /* addr_idx2 */,
                           uint32_t /* addr_idx3 */,
                           const uint32_t[8] /* tree_addr */,
                           const hash_state * /* state_seeded */),
        uint32_t tree_addrx4[4 * 8],
        const hash_state *state_seeded);

#endif