--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/security/SecureRandom/EnoughSeedTest.java	Thu May 19 04:20:08 2016 -0700
@@ -0,0 +1,100 @@
+/*
+ * 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 8141039
+ * @library /lib/testlibrary
+ * @summary Check SecureRandom generate expected seed counts what the caller
+ *          asked for.
+ * @run main EnoughSeedTest
+ */
+import java.security.SecureRandom;
+import java.security.Security;
+import static java.lang.Math.*;
+
+public class EnoughSeedTest {
+
+    private static final String DRBG_CONFIG = "securerandom.drbg.config";
+    private static final String DRBG_CONFIG_VALUE
+            = Security.getProperty(DRBG_CONFIG);
+
+    public static void main(String[] args) {
+
+        boolean success = true;
+        for (String mech : new String[]{
+            "SHA1PRNG", "Hash_DRBG", "HMAC_DRBG", "CTR_DRBG"}) {
+            System.out.printf("%nTest for SecureRandom algorithm: '%s'", mech);
+            try {
+                SecureRandom sr = null;
+                if (!mech.contains("_DRBG")) {
+                    sr = SecureRandom.getInstance(mech);
+                } else {
+                    Security.setProperty(DRBG_CONFIG, mech);
+                    sr = SecureRandom.getInstance("DRBG");
+                }
+
+                success &= forEachSeedBytes(sr);
+                System.out.printf("%nCompleted test for SecureRandom "
+                        + "mechanism: '%s'", mech);
+            } catch (Exception e) {
+                success &= false;
+                e.printStackTrace(System.out);
+            } finally {
+                Security.setProperty(DRBG_CONFIG, DRBG_CONFIG_VALUE);
+            }
+        }
+        if (!success) {
+            throw new RuntimeException("At least one test failed.");
+        }
+    }
+
+    /**
+     * Generates fixed number of seed bytes through a SecureRandom instance
+     * to verify it's seed generation status.
+     * @param sr SecureRandom instance
+     * @return The test success indicator
+     */
+    private static boolean forEachSeedBytes(SecureRandom sr) {
+        boolean success = true;
+        sr.setSeed(1l);
+        for (int seedByte : new int[]{Integer.MIN_VALUE, -1, 0, 1, 256, 1024,
+            Short.MAX_VALUE, (int) pow(2, 20)}) {
+            try {
+                byte[] seed = sr.generateSeed(seedByte);
+                if (seed.length != seedByte) {
+                    throw new RuntimeException("Not able to produce expected "
+                            + "seed size.");
+                }
+            } catch (IllegalArgumentException e) {
+                if (seedByte >= 0) {
+                    throw new RuntimeException("Unknown Exception occured.", e);
+                }
+                System.out.printf("%nPASS - Exception expected when required "
+                        + "seed size requested is negative: %s", seedByte);
+            }
+        }
+        return success;
+    }
+
+}