hextobin
extern size_t hextobin(const char *, size_t, char *, size_t);
(void) hextobin(members, strlen(members), (char *)m_ids, mids_size);
(void) hextobin(argv[SMB_PWD_LMHASH], SMBAUTH_HEXHASH_SZ,
(void) hextobin(argv[SMB_PWD_NTHASH], SMBAUTH_HEXHASH_SZ,