--- /dev/null	2016-04-01 19:18:08.000000000 +0800
+++ new/src/java.base/share/classes/sun/security/provider/HmacDrbg.java	2016-04-01 19:18:08.000000000 +0800
@@ -0,0 +1,177 @@
+/*
+ * 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.  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.provider;
+
+import javax.crypto.Mac;
+import javax.crypto.spec.SecretKeySpec;
+import java.io.IOException;
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+import java.security.NoSuchProviderException;
+import java.security.SecureRandomInstantiateParameters;
+import java.util.Arrays;
+
+public class HmacDrbg extends AbstractHashDrbg {
+
+    private static final long serialVersionUID = 9L;
+
+    private transient Mac mac;
+
+    private String macAlg;
+
+    private byte[] v;
+    private byte[] k;
+
+    public HmacDrbg(SecureRandomInstantiateParameters params) {
+        mechName = "HMAC_DRBG";
+        configureInternal(params);
+    }
+
+    private void status() {
+        if (debug != null) {
+            debug.println("V = " + hex(v));
+            debug.println("Key = " + hex(k));
+            debug.println("reseed counter = " + reseedCounter);
+        }
+    }
+
+    private void update(byte[]... inputs) {
+        try {
+            // Step 1.
+            mac.init(new SecretKeySpec(k, macAlg));
+            mac.update(v);
+            mac.update((byte) 0);
+            for (byte[] input: inputs) {
+                mac.update(input);
+            }
+            k = mac.doFinal();
+            // Step 2.
+            mac.init(new SecretKeySpec(k, macAlg));
+            v = mac.doFinal(v);
+            // Step 4.
+            if (inputs.length != 0) {
+                mac.update(v);
+                mac.update((byte) 1);
+                for (byte[] input: inputs) {
+                    mac.update(input);
+                }
+                k = mac.doFinal();
+                mac.init(new SecretKeySpec(k, macAlg));
+                v = mac.doFinal(v);
+            }
+        } catch (InvalidKeyException e) {
+            throw new InternalError(e);
+        }
+    }
+
+    /**
+     * This call, used by the constructors, instantiates the digest.
+     */
+    @Override
+    protected void initEngine() {
+        if (algorithm == null) {
+            return;
+        }
+        macAlg = "HmacSHA" + algorithm.substring(4);
+        try {
+            mac = Mac.getInstance(macAlg, "SunJCE");
+        } catch (NoSuchProviderException | NoSuchAlgorithmException e) {
+            // Fallback to any available.
+            try {
+                mac = Mac.getInstance(macAlg);
+            } catch (NoSuchAlgorithmException exc) {
+                throw new InternalError(
+                    "internal error: " + macAlg + " not available.", exc);
+            }
+        }
+    }
+
+    // For seeding, input is entropy_input || nonce || personalization_string;
+    // for reseeding, input is entropy_input || additional_input
+    @Override
+    protected final void hashReseedInternal(byte[] input) {
+        if (v == null) {
+            k = new byte[outLen];
+            v = new byte[outLen];
+            Arrays.fill(v, (byte) 1);
+        }
+        update(input);
+        reseedCounter = 1;
+        status();
+    }
+
+    /**
+     * Generates a user-specified number of random bytes.
+     *
+     * @param result the array to be filled in with random bytes.
+     */
+    @Override
+    public synchronized void generateAlgorithm(
+            byte[] result, byte[] additionalInput) {
+
+        // Step 2.
+        if (additionalInput != null) {
+            update(additionalInput);
+        }
+
+        // Step 3.
+        int pos = 0;
+
+        // Step 4.
+        while (pos < result.length) {
+            int tailLen = result.length - pos;
+            // Step 4.1.
+            try {
+                mac.init(new SecretKeySpec(k, macAlg));
+            } catch (InvalidKeyException e) {
+                throw new InternalError(e);
+            }
+            v = mac.doFinal(v);
+            // Step 4.2 and 5.
+            System.arraycopy(v, 0, result, pos,
+                    tailLen > outLen ? outLen : tailLen);
+            pos += outLen;
+        }
+
+        // Step 6.
+        if (additionalInput != null) {
+            update(additionalInput);
+        } else {
+            update();
+        }
+
+        // Step 7.
+        reseedCounter++;
+
+        status();
+    }
+
+    private void readObject(java.io.ObjectInputStream s)
+            throws IOException, ClassNotFoundException {
+        s.defaultReadObject ();
+        initEngine();
+    }
+}