Function botan_sys::botan_totp_init

pub unsafe extern "C" fn botan_totp_init(
    totp: *mut botan_totp_t, 
    key: *const u8, 
    key_len: usize, 
    hash_algo: *const c_char, 
    digits: usize, 
    time_step: usize
) -> c_int