--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/sun/security/ssl/EllipticPointFormatsExtension.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2006, 2016, 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;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.net.ssl.SSLProtocolException;
+
+final class EllipticPointFormatsExtension extends HelloExtension {
+
+    static final int FMT_UNCOMPRESSED = 0;
+    static final int FMT_ANSIX962_COMPRESSED_PRIME = 1;
+    static final int FMT_ANSIX962_COMPRESSED_CHAR2 = 2;
+
+    static final HelloExtension DEFAULT =
+            new EllipticPointFormatsExtension(new byte[] {FMT_UNCOMPRESSED});
+
+    private final byte[] formats;
+
+    private EllipticPointFormatsExtension(byte[] formats) {
+        super(ExtensionType.EXT_EC_POINT_FORMATS);
+        this.formats = formats;
+    }
+
+    EllipticPointFormatsExtension(HandshakeInStream s, int len)
+            throws IOException {
+        super(ExtensionType.EXT_EC_POINT_FORMATS);
+        formats = s.getBytes8();
+        // RFC 4492 says uncompressed points must always be supported.
+        // Check just to make sure.
+        boolean uncompressed = false;
+        for (int format : formats) {
+            if (format == FMT_UNCOMPRESSED) {
+                uncompressed = true;
+                break;
+            }
+        }
+        if (uncompressed == false) {
+            throw new SSLProtocolException
+                ("Peer does not support uncompressed points");
+        }
+    }
+
+    @Override
+    int length() {
+        return 5 + formats.length;
+    }
+
+    @Override
+    void send(HandshakeOutStream s) throws IOException {
+        s.putInt16(type.id);
+        s.putInt16(formats.length + 1);
+        s.putBytes8(formats);
+    }
+
+    private static String toString(byte format) {
+        int f = format & 0xff;
+        switch (f) {
+        case FMT_UNCOMPRESSED:
+            return "uncompressed";
+        case FMT_ANSIX962_COMPRESSED_PRIME:
+            return "ansiX962_compressed_prime";
+        case FMT_ANSIX962_COMPRESSED_CHAR2:
+            return "ansiX962_compressed_char2";
+        default:
+            return "unknown-" + f;
+        }
+    }
+
+    @Override
+    public String toString() {
+        List<String> list = new ArrayList<String>();
+        for (byte format : formats) {
+            list.add(toString(format));
+        }
+        return "Extension " + type + ", formats: " + list;
+    }
+}