/*
* Copyright ( c ) 2014 , 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 .
*/
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.spec.AlgorithmParameterSpec;
import java.util.Arrays;
import java.util.Random;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.ShortBufferException;
import javax.crypto.spec.IvParameterSpec;
/**
* @ test
* @ bug 8043836
* @ summary Test AES ciphers with 4 different modes with NoPadding . Check if
* data before encryption and after decryption is the same .
* @ key randomness
*/
public class CTR {
private static final String ALGORITHM = "AES" ;
private static final String PROVIDER = "SunJCE" ;
private static final String[] MODES = {"CTR" ,"CFB24" ,"OFB32" ,"GCM" };
private static final String PADDING = "NoPadding" ;
private static final int KEY_LENGTH = 128 ;
public static void main(String argv[]) throws Exception {
CTR test = new CTR();
for (String mode : MODES) {
test.runTest(ALGORITHM, mode, PADDING);
}
}
public void runTest(String algo, String mo, String pad) throws Exception {
Cipher ci = null ;
byte [] iv = null ;
AlgorithmParameterSpec aps = null ;
SecretKey key = null ;
try {
Random rdm = new Random();
byte [] plainText;
ci = Cipher.getInstance(algo + "/" + mo + "/" + pad, PROVIDER);
KeyGenerator kg = KeyGenerator.getInstance(algo, PROVIDER);
kg.init(KEY_LENGTH);
key = kg.generateKey();
for (int i = 0 ; i < 15 ; i++) {
plainText = new byte [1600 + i + 1 ];
rdm.nextBytes(plainText);
if (!mo.equalsIgnoreCase("GCM" )) {
ci.init(Cipher.ENCRYPT_MODE, key, aps);
} else {
ci.init(Cipher.ENCRYPT_MODE, key);
}
byte [] cipherText = new byte [ci.getOutputSize(plainText.length)];
int offset = ci.update(plainText, 0 , plainText.length,
cipherText, 0 );
ci.doFinal(cipherText, offset);
if (!mo.equalsIgnoreCase("ECB" )) {
iv = ci.getIV();
aps = new IvParameterSpec(iv);
} else {
aps = null ;
}
if (!mo.equalsIgnoreCase("GCM" )) {
ci.init(Cipher.DECRYPT_MODE, key, aps);
} else {
ci.init(Cipher.DECRYPT_MODE, key, ci.getParameters());
}
byte [] recoveredText = new byte [ci.getOutputSize(cipherText.length)];
int len = ci.doFinal(cipherText, 0 , cipherText.length,
recoveredText);
byte [] tmp = new byte [len];
for (int j = 0 ; j < len; j++) {
tmp[j] = recoveredText[j];
}
Arrays.toString(plainText);
if (!java.util.Arrays.equals(plainText, tmp)) {
System.out.println("Original: " );
dumpBytes(plainText);
System.out.println("Recovered: " );
dumpBytes(tmp);
throw new RuntimeException("Original text is not equal with recovered text, with mode:" + mo);
}
}
} catch (NoSuchAlgorithmException | NoSuchProviderException | NoSuchPaddingException
| InvalidKeyException | InvalidAlgorithmParameterException
| ShortBufferException | IllegalBlockSizeException
| BadPaddingException e) {
System.out.println("Test failed!" );
throw e;
}
}
private void dumpBytes(byte [] bytes){
for (byte b : bytes){
System.out.print(Integer.toHexString(b));
}
System.out.println();
}
}
Messung V0.5 in Prozent C=91 H=91 G=90
¤ Dauer der Verarbeitung: 0.4 Sekunden
¤
*© Formatika GbR, Deutschland