Function libsodium_sys::crypto_sign_ed25519_open

pub unsafe extern "C" fn crypto_sign_ed25519_open(
    m: *mut u8, 
    mlen: *mut c_ulonglong, 
    sm: *const u8, 
    smlen: c_ulonglong, 
    pk: *const [u8; 32]
) -> c_int