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* 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.
*
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import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;
import java.util.Arrays;
import java.util.Random;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.interfaces.PBEKey;
import javax.crypto.spec.PBEKeySpec;
/**
* @test
* @bug 8041781
* @summary Verify if the SecretKeyFactory.translateKey() method works
* @author Alexander Fomin
* @run main PBKDF2Translate
* @key randomness
*/
public class PBKDF2Translate {
private static final String[] ALGO_TO_TEST = {
"PBKDF2WithHmacSHA1",
"PBKDF2WithHmacSHA224",
"PBKDF2WithHmacSHA256",
"PBKDF2WithHmacSHA384",
"PBKDF2WithHmacSHA512"
};
private static final String PASS_PHRASE = "some hidden string";
private static final int ITERATION_COUNT = 1000;
private static final int KEY_SIZE = 128;
private final String algoToTest;
private final byte[] salt = new byte[8];
public static void main(String[] args) throws Exception {
boolean failed = false;
for (String algo : ALGO_TO_TEST) {
System.out.println("Testing " + algo + ":");
PBKDF2Translate theTest = new PBKDF2Translate(algo);
try {
if (!theTest.testMyOwnSecretKey()
|| !theTest.generateAndTranslateKey()
|| !theTest.translateSpoiledKey()) {
// we don't want to set failed to false
failed = true;
}
} catch (InvalidKeyException | NoSuchAlgorithmException |
InvalidKeySpecException e) {
e.printStackTrace(System.err);
failed = true;
}
}
if (failed) {
throw new RuntimeException("One or more tests failed....");
}
}
public PBKDF2Translate(String algoToTest) {
this.algoToTest = algoToTest;
new Random().nextBytes(this.salt);
}
/**
* The test case scenario implemented in the method: - derive PBKDF2 key
* using the given algorithm; - translate the key - check if the translated
* and original keys have the same key value.
*
* @return true if the test case passed; false - otherwise.
* @throws NoSuchAlgorithmException
* @throws InvalidKeySpecException
* @throws InvalidKeyException
*/
public boolean generateAndTranslateKey() throws NoSuchAlgorithmException,
InvalidKeySpecException, InvalidKeyException {
// derive PBKDF2 key
SecretKey key1 = getSecretKeyForPBKDF2(algoToTest);
// translate key
SecretKeyFactory skf = SecretKeyFactory.getInstance(algoToTest);
SecretKey key2 = skf.translateKey(key1);
// check if it still the same after translation
if (!Arrays.equals(key1.getEncoded(), key2.getEncoded())) {
System.err.println("generateAndTranslateKey test case failed: the "
+ "key1 and key2 values in its primary encoding format are "
+ "not the same for " + algoToTest + "algorithm.");
return false;
}
return true;
}
/**
* The test case scenario implemented in the method: - derive Key1 for the
* given PBKDF2 algorithm - create my own secret Key2 as an instance of a
* class implements PBEKey - translate Key2 - check if the key value of the
* translated key and Key1 are the same.
*
* @return true if the test case passed; false - otherwise.
* @throws NoSuchAlgorithmException
* @throws InvalidKeySpecException
* @throws InvalidKeyException
*/
public boolean testMyOwnSecretKey()
throws NoSuchAlgorithmException, InvalidKeySpecException,
InvalidKeyException {
SecretKey key1 = getSecretKeyForPBKDF2(algoToTest);
SecretKey key2 = getMyOwnSecretKey();
// Is it actually the same?
if (!Arrays.equals(key1.getEncoded(), key2.getEncoded())) {
System.err.println("We shouldn't be here. The key1 and key2 values "
+ "in its primary encoding format have to be the same!");
return false;
}
// Translate key
SecretKeyFactory skf = SecretKeyFactory.getInstance(algoToTest);
SecretKey key3 = skf.translateKey(key2);
// Check if it still the same after translation
if (!Arrays.equals(key1.getEncoded(), key3.getEncoded())) {
System.err.println("testMyOwnSecretKey test case failed: the key1 "
+ "and key3 values in its primary encoding format are not "
+ "the same for " + algoToTest + "algorithm.");
return false;
}
return true;
}
/**
* The test case scenario implemented in the method: - create my own secret
* Key2 as an instance of a class implements PBEKey - spoil the key (set
* iteration count to 0, for example) - try to translate key -
* InvalidKeyException is expected.
*
* @return true if InvalidKeyException occurred; false - otherwise.
* @throws NoSuchAlgorithmException
* @throws InvalidKeySpecException
*/
public boolean translateSpoiledKey() throws NoSuchAlgorithmException,
InvalidKeySpecException {
// derive the key
SecretKey key1 = getMyOwnSecretKey();
// spoil the key
((MyPBKDF2SecretKey) key1).spoil();
// translate key
SecretKeyFactory skf = SecretKeyFactory.getInstance(algoToTest);
try {
SecretKey key2 = skf.translateKey(key1);
} catch (InvalidKeyException ike) {
// this is expected
return true;
}
return false;
}
/**
* Generate a PBKDF2 secret key using given algorithm.
*
* @param algoToDeriveKey PBKDF2 algorithm
* @return PBKDF2 secret key
* @throws NoSuchAlgorithmException
* @throws InvalidKeySpecException
*/
private SecretKey getSecretKeyForPBKDF2(String algoToDeriveKey)
throws NoSuchAlgorithmException, InvalidKeySpecException {
SecretKeyFactory skf = SecretKeyFactory.getInstance(algoToDeriveKey);
PBEKeySpec spec = new PBEKeySpec(PASS_PHRASE.toCharArray(),
this.salt, ITERATION_COUNT, KEY_SIZE);
return skf.generateSecret(spec);
}
/**
* Generate a secrete key as an instance of a class implements PBEKey.
*
* @return secrete key
* @throws InvalidKeySpecException
* @throws NoSuchAlgorithmException
*/
private SecretKey getMyOwnSecretKey() throws InvalidKeySpecException,
NoSuchAlgorithmException {
return new MyPBKDF2SecretKey(PASS_PHRASE, this.algoToTest, this.salt,
ITERATION_COUNT, KEY_SIZE);
}
}
/**
* An utility class to check the SecretKeyFactory.translateKey() method.
*/
class MyPBKDF2SecretKey implements PBEKey {
private final byte[] key;
private final byte[] salt;
private final String algorithm;
private final int keySize, keyLength;
private int itereationCount;
private final String pass;
@Override
public String getAlgorithm() {
return algorithm;
}
@Override
public String getFormat() {
return "RAW";
}
@Override
public byte[] getEncoded() {
byte[] copy = new byte[keyLength];
System.arraycopy(this.key, 0, copy, 0, keyLength);
return copy;
}
/**
* The key is generating by SecretKeyFactory and its value just copying in
* the key field of MySecretKey class. So, this is real key derived using
* the given algorithm.
*
* @param passPhrase some string intended to be a password
* @param algo PBKDF2 algorithm
* @param salt slat for PBKDF2
* @param iterationCount iteration count
* @param keySize key size in bits
* @throws InvalidKeySpecException
* @throws NoSuchAlgorithmException
*/
public MyPBKDF2SecretKey(String passPhrase, String algo, byte[] salt,
int iterationCount, int keySize)
throws InvalidKeySpecException, NoSuchAlgorithmException {
this.algorithm = algo;
this.salt = salt;
this.itereationCount = iterationCount;
this.keySize = keySize;
this.pass = passPhrase;
PBEKeySpec spec = new PBEKeySpec(passPhrase.toCharArray(),
this.salt, iterationCount, this.keySize);
SecretKeyFactory keyFactory
= SecretKeyFactory.getInstance(algo);
SecretKey realKey = keyFactory.generateSecret(spec);
this.keyLength = realKey.getEncoded().length;
this.key = new byte[this.keyLength];
System.arraycopy(realKey.getEncoded(), 0, this.key, 0,
this.keyLength);
}
@Override
public int getIterationCount() {
return itereationCount;
}
@Override
public byte[] getSalt() {
return salt;
}
@Override
public char[] getPassword() {
return this.pass.toCharArray();
}
/**
* Spoil the generated key (before translation) to cause an
* InvalidKeyException
*/
public void spoil() {
this.itereationCount = -1;
}
}