// echo performs a public-key handshake with a provided network connection and
// uses a secure reader and writer to unencrypt and re-encrypt any message sent
// on the connection, echoing the message back.
func echo(c net.Conn, priv, pub *[32]byte, errc chan error) {
peersPub, err := receivePublic(c)
if err != nil {
c.Write([]byte("error receiving public key"))
return
}
if err := sendPublic(c, pub); err != nil {
errc <- err
}
secureR := secureio.NewSecureReader(c, priv, peersPub)
secureW := secureio.NewSecureWriter(c, priv, peersPub)
io.Copy(secureW, secureR)
}
func TestReadWriterPing(t *testing.T) {
priv, pub := &[32]byte{'p', 'r', 'i', 'v'}, &[32]byte{'p', 'u', 'b'}
r, w := io.Pipe()
defer w.Close()
secureR := secureio.NewSecureReader(r, priv, pub)
secureW := secureio.NewSecureWriter(w, priv, pub)
// Encrypt hello world
go fmt.Fprintf(secureW, "hello world\n")
// Decrypt message
buf := make([]byte, 1024)
n, err := secureR.Read(buf)
if err != nil {
t.Fatal(err)
}
buf = buf[:n]
// Make sure we have hello world back
if res := string(buf); res != "hello world\n" {
t.Fatalf("Unexpected result: %s != %s", res, "hello world")
}
}