function sodium_init()
    ccall((:sodium_init, libsodium), Cint, ())
end

function crypto_box_sealbytes()
    ccall((:crypto_box_sealbytes, libsodium), Csize_t, ())
end

function crypto_box_seal(c, m, mlen, pk)
    ccall((:crypto_box_seal, libsodium), Cint, (Ptr{Cuchar}, Ptr{Cuchar}, Culonglong, Ptr{Cuchar}), c, m, mlen, pk)
end
