Moved magic byte stuff for crypto

src/dorkbox/network/pipeline/MagicBytes.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2018 dorkbox, llc.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package dorkbox.network.pipeline;
+
+import io.netty.buffer.ByteBuf;
+
+/**
+ *
+ */
+public
+class MagicBytes {
+    /**
+     * bit masks
+     * <p>
+     * 0 means it's not encrypted or anything....
+     */
+    public static final byte crypto = (byte) (1 << 1);
+
+    /**
+     * Determines if this buffer is encrypted or not.
+     */
+    public static
+    boolean isEncrypted(final ByteBuf buffer) {
+        // read off the magic byte
+        byte magicByte = buffer.getByte(buffer.readerIndex());
+        return (magicByte & crypto) == crypto;
+    }
+}