test/jdk/java/security/SecureRandom/SerializedSeedTest.java - platform/libcore - Git at Google

 /*
  * 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 When random number is generated through the a SecureRandom instance
  *          as well from it's serialized instance in the same time then the
  *          generated random numbers should be different when one or both are
  *          reseeded.
  * @run main/othervm -Djava.security.egd=file:/dev/urandom SerializedSeedTest
  */
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
 import java.io.ByteArrayInputStream;
 import java.security.NoSuchAlgorithmException;
 import java.security.SecureRandom;
 import java.security.Security;
 import jdk.testlibrary.Asserts;

 public class SerializedSeedTest {

     private static final byte[] SEED = "seed".getBytes();
     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(
                     "%nRunning test for SecureRandom mechanism: '%s'", mech);
             try {
                 // Serialize without seed and compare generated random numbers
                 // produced through original and serialized instances.
                 SecureRandom orig = getSRInstance(mech);
                 SecureRandom copy = deserializedCopy(orig);
                 System.out.printf("%nSerialize without seed. Generated random"
                         + " numbers should be different.");
                 check(orig, copy, false, mech);

                 // Serialize after default seed and compare generated random
                 // numbers produced through original and serialized instances.
                 orig = getSRInstance(mech);
                 orig.nextInt(); // Default seeded
                 copy = deserializedCopy(orig);
                 System.out.printf("%nSerialize after default seed. Generated"
                         + " random numbers should be same till 20-bytes.");
                 check(orig, copy, !isDRBG(mech), mech);

                 // Serialize after explicit seed and compare generated random
                 // numbers produced through original and serialized instances.
                 orig = getSRInstance(mech);
                 orig.setSeed(SEED); // Explicitly seeded
                 copy = deserializedCopy(orig);
                 System.out.printf("%nSerialize after explicit seed. Generated "
                         + "random numbers should be same till 20-bytes.");
                 check(orig, copy, !isDRBG(mech), mech);

                 // Serialize without seed but original is explicitly seeded
                 // before generating any random number. Then compare generated
                 // random numbers produced through original and serialized
                 // instances.
                 orig = getSRInstance(mech);
                 copy = deserializedCopy(orig);
                 orig.setSeed(SEED); // Explicitly seeded
                 System.out.printf("%nSerialize without seed. When original is "
                         + "explicitly seeded before generating random numbers,"
                         + " Generated random numbers should be different.");
                 check(orig, copy, false, mech);

                 // Serialize after default seed but original is explicitly
                 // seeded before generating any random number. Then compare
                 // generated random numbers produced through original and
                 // serialized instances.
                 orig = getSRInstance(mech);
                 orig.nextInt(); // Default seeded
                 copy = deserializedCopy(orig);
                 orig.setSeed(SEED); // Explicitly seeded
                 System.out.printf("%nSerialize after default seed but original "
                         + "is explicitly seeded before generating random number"
                         + ". Generated random numbers should be different.");
                 check(orig, copy, false, mech);

                 // Serialize after explicit seed but original is explicitly
                 // seeded again before generating random number. Then compare
                 // generated random numbers produced through original and
                 // serialized instances.
                 orig = getSRInstance(mech);
                 orig.setSeed(SEED); // Explicitly seeded
                 copy = deserializedCopy(orig);
                 orig.setSeed(SEED); // Explicitly seeded
                 System.out.printf("%nSerialize after explicit seed but "
                         + "original is explicitly seeded again before "
                         + "generating random number. Generated random "
                         + "numbers should be different.");
                 check(orig, copy, false, mech);

             } catch (Exception e) {
                 e.printStackTrace(System.out);
                 success = false;
             } finally {
                 Security.setProperty(DRBG_CONFIG, DRBG_CONFIG_VALUE);
             }
             System.out.printf("%n------Completed Test for %s------", mech);
         }

         if (!success) {
             throw new RuntimeException("At least one test failed.");
         }
     }

     /**
      * Find if the mechanism is a DRBG mechanism.
      * @param mech Mechanism name
      * @return True for DRBG mechanism else False
      */
     private static boolean isDRBG(String mech) {
         return mech.contains("_DRBG");
     }

     /**
      * Verify the similarity of random numbers generated though both original
      * as well as deserialized instance.
      */
     private static void check(SecureRandom orig, SecureRandom copy,
             boolean equal, String mech) {
         int o = orig.nextInt();
         int c = copy.nextInt();
         System.out.printf("%nRandom number generated for mechanism: '%s' "
                 + "from original instance as: '%s' and from serialized "
                 + "instance as: '%s'", mech, o, c);
         if (equal) {
             Asserts.assertEquals(o, c, mech);
         } else {
             Asserts.assertNotEquals(o, c, mech);
         }
     }

     /**
      * Get a copy of SecureRandom instance through deserialization.
      * @param orig Original SecureRandom instance
      * @return Deserialized SecureRandom instance
      * @throws IOException
      * @throws ClassNotFoundException
      */
     private static SecureRandom deserializedCopy(SecureRandom orig)
             throws IOException, ClassNotFoundException {
         return deserialize(serialize(orig));
     }

     /**
      * Deserialize the SecureRandom object.
      */
     private static SecureRandom deserialize(byte[] serialized)
             throws IOException, ClassNotFoundException {
         SecureRandom sr = null;
         try (ByteArrayInputStream bis = new ByteArrayInputStream(serialized);
                 ObjectInputStream ois = new ObjectInputStream(bis)) {
             sr = (SecureRandom) ois.readObject();
         }
         return sr;
     }

     /**
      * Serialize the given SecureRandom object.
      */
     private static byte[] serialize(SecureRandom sr) throws IOException {
         try (ByteArrayOutputStream bos = new ByteArrayOutputStream();
                 ObjectOutputStream oos = new ObjectOutputStream(bos)) {
             oos.writeObject(sr);
             return bos.toByteArray();
         }
     }

     /**
      * Create a SecureRandom instance for a given mechanism.
      */
     private static SecureRandom getSRInstance(String mech)
             throws NoSuchAlgorithmException {
         if (!isDRBG(mech)) {
             return SecureRandom.getInstance(mech);
         } else {
             Security.setProperty(DRBG_CONFIG, mech);
             return SecureRandom.getInstance("DRBG");
         }
     }

 }
	/*
	* 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 When random number is generated through the a SecureRandom instance
	* as well from it's serialized instance in the same time then the
	* generated random numbers should be different when one or both are
	* reseeded.
	* @run main/othervm -Djava.security.egd=file:/dev/urandom SerializedSeedTest
	*/
	import java.io.ByteArrayOutputStream;
	import java.io.IOException;
	import java.io.ObjectInputStream;
	import java.io.ObjectOutputStream;
	import java.io.ByteArrayInputStream;
	import java.security.NoSuchAlgorithmException;
	import java.security.SecureRandom;
	import java.security.Security;
	import jdk.testlibrary.Asserts;

	public class SerializedSeedTest {

	private static final byte[] SEED = "seed".getBytes();
	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(
	"%nRunning test for SecureRandom mechanism: '%s'", mech);
	try {
	// Serialize without seed and compare generated random numbers
	// produced through original and serialized instances.
	SecureRandom orig = getSRInstance(mech);
	SecureRandom copy = deserializedCopy(orig);
	System.out.printf("%nSerialize without seed. Generated random"
	+ " numbers should be different.");
	check(orig, copy, false, mech);

	// Serialize after default seed and compare generated random
	// numbers produced through original and serialized instances.
	orig = getSRInstance(mech);
	orig.nextInt(); // Default seeded
	copy = deserializedCopy(orig);
	System.out.printf("%nSerialize after default seed. Generated"
	+ " random numbers should be same till 20-bytes.");
	check(orig, copy, !isDRBG(mech), mech);

	// Serialize after explicit seed and compare generated random
	// numbers produced through original and serialized instances.
	orig = getSRInstance(mech);
	orig.setSeed(SEED); // Explicitly seeded
	copy = deserializedCopy(orig);
	System.out.printf("%nSerialize after explicit seed. Generated "
	+ "random numbers should be same till 20-bytes.");
	check(orig, copy, !isDRBG(mech), mech);

	// Serialize without seed but original is explicitly seeded
	// before generating any random number. Then compare generated
	// random numbers produced through original and serialized
	// instances.
	orig = getSRInstance(mech);
	copy = deserializedCopy(orig);
	orig.setSeed(SEED); // Explicitly seeded
	System.out.printf("%nSerialize without seed. When original is "
	+ "explicitly seeded before generating random numbers,"
	+ " Generated random numbers should be different.");
	check(orig, copy, false, mech);

	// Serialize after default seed but original is explicitly
	// seeded before generating any random number. Then compare
	// generated random numbers produced through original and
	// serialized instances.
	orig = getSRInstance(mech);
	orig.nextInt(); // Default seeded
	copy = deserializedCopy(orig);
	orig.setSeed(SEED); // Explicitly seeded
	System.out.printf("%nSerialize after default seed but original "
	+ "is explicitly seeded before generating random number"
	+ ". Generated random numbers should be different.");
	check(orig, copy, false, mech);

	// Serialize after explicit seed but original is explicitly
	// seeded again before generating random number. Then compare
	// generated random numbers produced through original and
	// serialized instances.
	orig = getSRInstance(mech);
	orig.setSeed(SEED); // Explicitly seeded
	copy = deserializedCopy(orig);
	orig.setSeed(SEED); // Explicitly seeded
	System.out.printf("%nSerialize after explicit seed but "
	+ "original is explicitly seeded again before "
	+ "generating random number. Generated random "
	+ "numbers should be different.");
	check(orig, copy, false, mech);

	} catch (Exception e) {
	e.printStackTrace(System.out);
	success = false;
	} finally {
	Security.setProperty(DRBG_CONFIG, DRBG_CONFIG_VALUE);
	}
	System.out.printf("%n------Completed Test for %s------", mech);
	}

	if (!success) {
	throw new RuntimeException("At least one test failed.");
	}
	}

	/**
	* Find if the mechanism is a DRBG mechanism.
	* @param mech Mechanism name
	* @return True for DRBG mechanism else False
	*/
	private static boolean isDRBG(String mech) {
	return mech.contains("_DRBG");
	}

	/**
	* Verify the similarity of random numbers generated though both original
	* as well as deserialized instance.
	*/
	private static void check(SecureRandom orig, SecureRandom copy,
	boolean equal, String mech) {
	int o = orig.nextInt();
	int c = copy.nextInt();
	System.out.printf("%nRandom number generated for mechanism: '%s' "
	+ "from original instance as: '%s' and from serialized "
	+ "instance as: '%s'", mech, o, c);
	if (equal) {
	Asserts.assertEquals(o, c, mech);
	} else {
	Asserts.assertNotEquals(o, c, mech);
	}
	}

	/**
	* Get a copy of SecureRandom instance through deserialization.
	* @param orig Original SecureRandom instance
	* @return Deserialized SecureRandom instance
	* @throws IOException
	* @throws ClassNotFoundException
	*/
	private static SecureRandom deserializedCopy(SecureRandom orig)
	throws IOException, ClassNotFoundException {
	return deserialize(serialize(orig));
	}

	/**
	* Deserialize the SecureRandom object.
	*/
	private static SecureRandom deserialize(byte[] serialized)
	throws IOException, ClassNotFoundException {
	SecureRandom sr = null;
	try (ByteArrayInputStream bis = new ByteArrayInputStream(serialized);
	ObjectInputStream ois = new ObjectInputStream(bis)) {
	sr = (SecureRandom) ois.readObject();
	}
	return sr;
	}

	/**
	* Serialize the given SecureRandom object.
	*/
	private static byte[] serialize(SecureRandom sr) throws IOException {
	try (ByteArrayOutputStream bos = new ByteArrayOutputStream();
	ObjectOutputStream oos = new ObjectOutputStream(bos)) {
	oos.writeObject(sr);
	return bos.toByteArray();
	}
	}

	/**
	* Create a SecureRandom instance for a given mechanism.
	*/
	private static SecureRandom getSRInstance(String mech)
	throws NoSuchAlgorithmException {
	if (!isDRBG(mech)) {
	return SecureRandom.getInstance(mech);
	} else {
	Security.setProperty(DRBG_CONFIG, mech);
	return SecureRandom.getInstance("DRBG");
	}
	}

	}