--- /dev/null	Wed Mar 23 16:12:18 2016
+++ new/test/com/sun/crypto/provider/KeyAgreement/SupportedDHKeys.java	Wed Mar 23 16:12:18 2016
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 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.
+ *
+ * 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.
+ */
+
+/**
+ * @test
+ * @bug 8072452
+ * @summary Support DHE sizes up to 8192-bits
+ */
+
+import java.math.BigInteger;
+
+import java.security.*;
+import javax.crypto.*;
+import javax.crypto.interfaces.*;
+import javax.crypto.spec.*;
+
+public class SupportedDHKeys {
+
+    /*
+     * Sizes and values for various lengths.
+     */
+    private enum SupportedKeySize {
+        dhp512(512),   dhp768(768),    dhp832(832),
+        dhp1024(1024), dhp1536(1536),  dhp2048(2048),
+        dhp3072(3072), dhp4096(4096),  dhp6144(6144),
+        dhp8192(8192);
+
+        final int primeSize;
+
+        SupportedKeySize(int primeSize) {
+            this.primeSize = primeSize;
+        }
+    }
+
+    public static void main(String[] args) throws Exception {
+        for (SupportedKeySize keySize : SupportedKeySize.values()) {
+            System.out.println("Checking " + keySize.primeSize + " ...");
+            KeyPairGenerator kpg = KeyPairGenerator.getInstance("DH", "SunJCE");
+            kpg.initialize(keySize.primeSize);
+            KeyPair kp = kpg.generateKeyPair();
+            checkKeyPair(kp, keySize.primeSize);
+
+            DHPublicKey publicKey = (DHPublicKey)kp.getPublic();
+            BigInteger p = publicKey.getParams().getP();
+            BigInteger g = publicKey.getParams().getG();
+            kpg.initialize(new DHParameterSpec(p, g));
+            kp = kpg.generateKeyPair();
+            checkKeyPair(kp, keySize.primeSize);
+        }
+    }
+
+    private static void checkKeyPair(KeyPair kp, int pSize) throws Exception {
+
+        DHPrivateKey privateKey = (DHPrivateKey)kp.getPrivate();
+        BigInteger p = privateKey.getParams().getP();
+        if (p.bitLength() != pSize) {
+            throw new Exception(
+                "Invalid modulus size: " + p.bitLength() + "/" + pSize);
+        }
+
+        // System.out.println("P(" + pSize + "): " + p.toString());
+        if (!p.isProbablePrime(128)) {
+            throw new Exception("Good luck, the modulus is composite!");
+        }
+
+        DHPublicKey publicKey = (DHPublicKey)kp.getPublic();
+        p = publicKey.getParams().getP();
+        if (p.bitLength() != pSize) {
+            throw new Exception(
+                "Invalid modulus size: " + p.bitLength() + "/" + pSize);
+        }
+
+        BigInteger leftOpen = BigInteger.ONE;
+        BigInteger rightOpen = p.subtract(BigInteger.ONE);
+
+        BigInteger x = privateKey.getX();
+        if ((x.compareTo(leftOpen) <= 0) ||
+                (x.compareTo(rightOpen) >= 0)) {
+            throw new Exception(
+                "X outside range [2, p - 2]:  x: " + x + " p: " + p);
+        }
+
+        BigInteger y = publicKey.getY();
+        if ((y.compareTo(leftOpen) <= 0) ||
+                (y.compareTo(rightOpen) >= 0)) {
+            throw new Exception(
+                "Y outside range [2, p - 2]:  x: " + x + " p: " + p);
+        }
+    }
+}