libsodium_sys::crypto_box_curve25519xsalsa20poly1305_open

pub unsafe extern fn crypto_box_curve25519xsalsa20poly1305_open(m: *mut u8, c: *const u8, clen: c_ulonglong, n: *const [u8; 24], pk: *const [u8; 32], sk: *const [u8; 32]) -> c_int