libsodium_sys

Function crypto_stream_chacha20_xor

Source 
pub unsafe extern "C" fn crypto_stream_chacha20_xor(
    c: *mut u8,
    m: *const u8,
    mlen: c_ulonglong,
    n: *const [u8; 8],
    k: *const [u8; 32],
) -> c_int