--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/sun/security/rsa/KeySizeTest.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+
+import java.security.KeyFactory;
+import java.security.KeyPair;
+import java.security.KeyPairGenerator;
+import java.security.PrivateKey;
+import java.security.PublicKey;
+import java.security.interfaces.RSAKey;
+import java.security.interfaces.RSAPrivateKey;
+import java.security.interfaces.RSAPublicKey;
+import java.security.spec.RSAPrivateKeySpec;
+import java.security.spec.RSAPublicKeySpec;
+
+/**
+ * @test
+ * @bug 8044199
+ * @summary test if the private and public key size are the same as what is set
+ * through KeyPairGenerator.
+ * @run main KeySizeTest 512 10
+ * @run main KeySizeTest 768 10
+ * @run main KeySizeTest 1024 10
+ * @run main KeySizeTest 2048 5
+ * @run main KeySizeTest 4096 1
+ */
+public class KeySizeTest {
+
+    /**
+     * ALGORITHM name, fixed as RSA.
+     */
+    private static final String KEYALG = "RSA";
+
+    /**
+     * JDK default RSA Provider.
+     */
+    private static final String PROVIDER_NAME = "SunRsaSign";
+
+    public static void main(String[] args) throws Exception {
+        int iKeyPairSize = Integer.parseInt(args[0]);
+        int maxLoopCnt = Integer.parseInt(args[1]);
+
+        int failCount = 0;
+        KeyPairGenerator keyPairGen
+                = KeyPairGenerator.getInstance(KEYALG, PROVIDER_NAME);
+        keyPairGen.initialize(iKeyPairSize);
+        // Generate RSA keypair
+        KeyPair keyPair = keyPairGen.generateKeyPair();
+
+        // Get priavte and public keys
+        PrivateKey privateKey = keyPair.getPrivate();
+        PublicKey publicKey = keyPair.getPublic();
+        try {
+            if (!sizeTest(keyPair)) {
+                failCount++;
+            }
+        } catch (Exception ex) {
+            ex.printStackTrace(System.err);
+            failCount++;
+        }
+
+        for (int iCnt = 0; iCnt < maxLoopCnt; iCnt++) {
+
+            // Get keysize (modulus) of keys
+            KeyFactory keyFact = KeyFactory.getInstance(KEYALG, PROVIDER_NAME);
+
+            // Comparing binary length.
+            RSAPrivateKeySpec privateKeySpec
+                    = (RSAPrivateKeySpec) keyFact.getKeySpec(privateKey,
+                            RSAPrivateKeySpec.class);
+            int iPrivateKeySize = privateKeySpec.getModulus().bitLength();
+
+            RSAPublicKeySpec publicKeySpec
+                    = (RSAPublicKeySpec) keyFact.getKeySpec(publicKey,
+                            RSAPublicKeySpec.class);
+            int iPublicKeySize = publicKeySpec.getModulus().bitLength();
+
+            if ((iKeyPairSize != iPublicKeySize) || (iKeyPairSize != iPrivateKeySize)) {
+                System.err.println("iKeyPairSize : " + iKeyPairSize);
+                System.err.println("Generated a " + iPrivateKeySize
+                        + " bit RSA private key");
+                System.err.println("Generated a " + iPublicKeySize
+                        + " bit RSA public key");
+                failCount++;
+            }
+        }
+
+        if (failCount > 0) {
+            throw new RuntimeException("There are " + failCount + " tests failed.");
+        }
+    }
+
+    /**
+     * @param kpair test key pair.
+     * @return true if test passed. false if test failed.
+     */
+    private static boolean sizeTest(KeyPair kpair) {
+        RSAPrivateKey priv = (RSAPrivateKey) kpair.getPrivate();
+        RSAPublicKey pub = (RSAPublicKey) kpair.getPublic();
+
+        // test the getModulus method
+        if ((priv instanceof RSAKey) && (pub instanceof RSAKey)) {
+            if (!priv.getModulus().equals(pub.getModulus())) {
+                System.err.println("priv.getModulus() = " + priv.getModulus());
+                System.err.println("pub.getModulus() = " + pub.getModulus());
+                return false;
+            }
+        }
+        return true;
+    }
+}