pub unsafe extern "C" fn crypto_aead_chacha20poly1305_ietf_decrypt( m: *mut u8, mlen: *mut c_ulonglong, nsec: *mut [u8; 0], c: *const u8, clen: c_ulonglong, ad: *const u8, adlen: c_ulonglong, npub: *const [u8; 12], k: *const [u8; 32]) -> c_int