xmss_commons.h

#ifndef XMSS_COMMONS_H
#define XMSS_COMMONS_H

#include <stdint.h>

#include "params.h"

void l_tree(const xmss_params *params, unsigned char *leaf, unsigned char *wots_pk, const unsigned char *pub_seed,
            uint32_t addr[8]);

void compute_root(const xmss_params *params, unsigned char *root, const unsigned char *leaf, unsigned long leafidx,
                  const unsigned char *auth_path, const unsigned char *pub_seed, uint32_t addr[8]);

/**
 * Computes the leaf at a given address. First generates the WOTS key pair,
 * then computes leaf using l_tree. As this happens position independent, we
 * only require that addr encodes the right ltree-address.
 */
void gen_leaf_wots(const xmss_params *params, unsigned char *leaf, const unsigned char *sk_seed,
                   const unsigned char *pub_seed, uint32_t ltree_addr[8], uint32_t ots_addr[8]);

/**
 * Verifies a given message signature pair under a given public key.
 * Note that this assumes a pk without an OID, i.e. [root || PUB_SEED]
 */
int xmss_core_sign_open(const xmss_params *params, unsigned char *m, unsigned long long *mlen, const unsigned char *sm,
                        unsigned long long smlen, const unsigned char *pk);

/**
 * Verifies a given message signature pair under a given public key.
 * Note that this assumes a pk without an OID, i.e. [root || PUB_SEED]
 */
int xmssmt_core_sign_open(const xmss_params *params, unsigned char *m, unsigned long long *mlen,
                          const unsigned char *sm, unsigned long long smlen, const unsigned char *pk);
#endif