Function libsodium_sys::crypto_box_open

pub unsafe extern fn crypto_box_open(m: *mut u8,
                                     c: *const u8,
                                     clen: c_ulonglong,
                                     n: *const [u8; 24],
                                     pk: *const [u8; 32],
                                     sk: *const [u8; 32])
                                     -> c_int