--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.base/share/classes/sun/security/provider/HmacDrbg.java Fri May 06 11:38:44 2016 +0800
@@ -0,0 +1,203 @@
+/*
+ * 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.SecureRandomParameters;
+import java.util.Arrays;
+
+public class HmacDrbg extends AbstractHashDrbg {
+
+ private static final long serialVersionUID = 9L;
+
+ private transient Mac mac;
+
+ private String macAlg;
+
+ private transient byte[] v;
+ private transient byte[] k;
+
+ public HmacDrbg(SecureRandomParameters params) {
+ mechName = "HMAC_DRBG";
+ configure(params);
+ }
+
+ private void status() {
+ if (debug != null) {
+ debug.println(this, "V = " + hex(v));
+ debug.println(this, "Key = " + hex(k));
+ debug.println(this, "reseed counter = " + reseedCounter);
+ }
+ }
+
+ // 800-90Ar1 10.1.2.2: HMAC_DRBG Update Process
+ private void update(byte[]... inputs) {
+ try {
+ // Step 1. K = HMAC (K, V || 0x00 || provided_data).
+ 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. V = HMAC (K, V).
+ mac.init(new SecretKeySpec(k, macAlg));
+ v = mac.doFinal(v);
+
+ if (inputs.length != 0) {
+ // Step 4. K = HMAC (K, V || 0x01 || provided_data).
+ mac.update(v);
+ mac.update((byte) 1);
+ for (byte[] input: inputs) {
+ mac.update(input);
+ }
+ k = mac.doFinal();
+
+ // Step 5. V=HMAC(K,V).
+ mac.init(new SecretKeySpec(k, macAlg));
+ v = mac.doFinal(v);
+ } // else Step 3
+
+ // Step 6. Return
+ } catch (InvalidKeyException e) {
+ throw new InternalError(e);
+ }
+ }
+
+ /**
+ * This call, used by the constructors, instantiates the digest.
+ */
+ @Override
+ protected void initEngine() {
+ 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);
+ }
+ }
+ }
+
+ // This method is used by both instantiation and reseeding.
+ @Override
+ protected final void hashReseedInternal(byte[] input) {
+
+ // 800-90Ar1 10.1.2.3: Instantiate Process.
+ // 800-90Ar1 10.1.2.4: Reseed Process.
+ if (v == null) {
+ k = new byte[outLen];
+ v = new byte[outLen];
+ Arrays.fill(v, (byte) 1);
+ }
+
+ // Step 2: HMAC_DRBG_Update
+ update(input);
+
+ // Step 3: reseed_counter = 1.
+ reseedCounter = 1;
+ //status();
+
+ // Step 4: Return
+ }
+
+ /**
+ * 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) {
+
+ if (debug != null) {
+ debug.println(this, "generateAlgorithm");
+ }
+
+ // 800-90Ar1 10.1.2.5: HMAC_DRBG_Generate Process
+
+ // Step 1: Check reseed_counter. Will not fail. Already checked in
+ // AbstractDrbg#engineNextBytes.
+
+ // Step 2. HMAC_DRBG_Update
+ if (additionalInput != null) {
+ update(additionalInput);
+ }
+
+ // Step 3. temp = Null.
+ int pos = 0;
+
+ // Step 4. Loop
+ while (pos < result.length) {
+ int tailLen = result.length - pos;
+
+ // Step 4.1 V = HMAC (Key, V).
+ try {
+ mac.init(new SecretKeySpec(k, macAlg));
+ } catch (InvalidKeyException e) {
+ throw new InternalError(e);
+ }
+ v = mac.doFinal(v);
+ // Step 4.2 temp = temp || V.
+ System.arraycopy(v, 0, result, pos,
+ tailLen > outLen ? outLen : tailLen);
+ pos += outLen;
+ }
+
+ // Step 5: No need to truncate
+
+ // Step 6. HMAC_DRBG_Update (additional_input, Key, V).
+ if (additionalInput != null) {
+ update(additionalInput);
+ } else {
+ update();
+ }
+
+ // Step 7. reseed_counter = reseed_counter + 1.
+ reseedCounter++;
+
+ //status();
+
+ // Step 8. Return
+ }
+
+ private void readObject(java.io.ObjectInputStream s)
+ throws IOException, ClassNotFoundException {
+ s.defaultReadObject ();
+ initEngine();
+ }
+}