--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/sun/security/ssl/ContentType.java	Fri May 11 15:53:12 2018 -0700
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package sun.security.ssl;
+
+/**
+ * Enum for SSL/(D)TLS content types.
+ */
+enum ContentType {
+    INVALID             ((byte)0,   "invalid",
+                            ProtocolVersion.PROTOCOLS_OF_13),
+    CHANGE_CIPHER_SPEC  ((byte)20,  "change_cipher_spec",
+                            ProtocolVersion.PROTOCOLS_TO_12),
+    ALERT               ((byte)21,  "alert",
+                            ProtocolVersion.PROTOCOLS_TO_13),
+    HANDSHAKE           ((byte)22,  "handshake",
+                            ProtocolVersion.PROTOCOLS_TO_13),
+    APPLICATION_DATA    ((byte)23,  "application_data",
+                            ProtocolVersion.PROTOCOLS_TO_13);
+
+    final byte id;
+    final String name;
+    final ProtocolVersion[] supportedProtocols;
+
+    private ContentType(byte id, String name,
+            ProtocolVersion[] supportedProtocols) {
+        this.id = id;
+        this.name = name;
+        this.supportedProtocols = supportedProtocols;
+    }
+
+    static ContentType valueOf(byte id) {
+        for (ContentType ct : ContentType.values()) {
+            if (ct.id == id) {
+                return ct;
+            }
+        }
+
+        return null;
+    }
+
+    static String nameOf(byte id) {
+        for (ContentType ct : ContentType.values()) {
+            if (ct.id == id) {
+                return ct.name;
+            }
+        }
+
+        return "<UNKNOWN CONTENT TYPE: " + (id & 0x0FF) + ">";
+    }
+}