CONFOUNDER_LEN
static hash_info_t crc32_hash = {CRC32_HASHSIZE, CONFOUNDER_LEN, crc32_calc};
static hash_info_t md5_hash = {MD5_HASHSIZE, CONFOUNDER_LEN, md5_calc};
static hash_info_t sha1_hash = {SHA1_HASHSIZE, CONFOUNDER_LEN, sha1_calc};