#ifndef PQCLEAN_SPHINCSSHA256256SROBUST_AVX2_UTILS_H #define PQCLEAN_SPHINCSSHA256256SROBUST_AVX2_UTILS_H #include "hash_state.h" #include "params.h" #include <stddef.h> #include <stdint.h> /** * Converts the value of 'in' to 'outlen' bytes in big-endian byte order. */ void PQCLEAN_SPHINCSSHA256256SROBUST_AVX2_ull_to_bytes( unsigned char *out, size_t outlen, unsigned long long in); /** * Converts the inlen bytes in 'in' from big-endian byte order to an integer. */ unsigned long long PQCLEAN_SPHINCSSHA256256SROBUST_AVX2_bytes_to_ull( const unsigned char *in, size_t inlen); /** * Computes a root node given a leaf and an auth path. * Expects address to be complete other than the tree_height and tree_index. */ void PQCLEAN_SPHINCSSHA256256SROBUST_AVX2_compute_root( unsigned char *root, const unsigned char *leaf, uint32_t leaf_idx, uint32_t idx_offset, const unsigned char *auth_path, uint32_t tree_height, const unsigned char *pub_seed, uint32_t addr[8], const hash_state *hash_state_seeded); /** * 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_SPHINCSSHA256256SROBUST_AVX2_ADDR_TYPE_HASHTREE or PQCLEAN_SPHINCSSHA256256SROBUST_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_SPHINCSSHA256256SROBUST_AVX2_treehash_FORS_HEIGHT( unsigned char *root, unsigned char *auth_path, const unsigned char *sk_seed, const unsigned char *pub_seed, uint32_t leaf_idx, uint32_t idx_offset, void (*gen_leaf)( unsigned char * /* leaf */, const unsigned char * /* sk_seed */, const unsigned char * /* pub_seed */, uint32_t /* addr_idx */, const uint32_t[8] /* tree_addr */, const hash_state * /* hash_state_seeded */), uint32_t tree_addr[8], const hash_state *hash_state_seeded); void PQCLEAN_SPHINCSSHA256256SROBUST_AVX2_treehash_TREE_HEIGHT( unsigned char *root, unsigned char *auth_path, const unsigned char *sk_seed, const unsigned char *pub_seed, uint32_t leaf_idx, uint32_t idx_offset, void (*gen_leaf)( unsigned char * /* leaf */, const unsigned char * /* sk_seed */, const unsigned char * /* pub_seed */, uint32_t /* addr_idx */, const uint32_t[8] /* tree_addr */, const hash_state * /* hash_state_seeded */), uint32_t tree_addr[8], const hash_state *hash_state_seeded); #endif