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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.4. Note: this package includes the NTRU encryption algorithms.
package org.bouncycastle.crypto.test;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.SecureRandom;
import org.bouncycastle.crypto.BlockCipher;
import org.bouncycastle.crypto.BufferedBlockCipher;
import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.crypto.StreamCipher;
import org.bouncycastle.crypto.engines.AESEngine;
import org.bouncycastle.crypto.engines.BlowfishEngine;
import org.bouncycastle.crypto.engines.CAST5Engine;
import org.bouncycastle.crypto.engines.CAST6Engine;
import org.bouncycastle.crypto.engines.CamelliaEngine;
import org.bouncycastle.crypto.engines.ChaChaEngine;
import org.bouncycastle.crypto.engines.DESEngine;
import org.bouncycastle.crypto.engines.DESedeEngine;
import org.bouncycastle.crypto.engines.Grain128Engine;
import org.bouncycastle.crypto.engines.Grainv1Engine;
import org.bouncycastle.crypto.engines.HC128Engine;
import org.bouncycastle.crypto.engines.HC256Engine;
import org.bouncycastle.crypto.engines.NoekeonEngine;
import org.bouncycastle.crypto.engines.RC2Engine;
import org.bouncycastle.crypto.engines.RC4Engine;
import org.bouncycastle.crypto.engines.RC6Engine;
import org.bouncycastle.crypto.engines.SEEDEngine;
import org.bouncycastle.crypto.engines.Salsa20Engine;
import org.bouncycastle.crypto.engines.SerpentEngine;
import org.bouncycastle.crypto.engines.TEAEngine;
import org.bouncycastle.crypto.engines.ThreefishEngine;
import org.bouncycastle.crypto.engines.TwofishEngine;
import org.bouncycastle.crypto.engines.XSalsa20Engine;
import org.bouncycastle.crypto.engines.XTEAEngine;
import org.bouncycastle.crypto.io.CipherInputStream;
import org.bouncycastle.crypto.io.CipherOutputStream;
import org.bouncycastle.crypto.io.InvalidCipherTextIOException;
import org.bouncycastle.crypto.modes.AEADBlockCipher;
import org.bouncycastle.crypto.modes.CBCBlockCipher;
import org.bouncycastle.crypto.modes.CCMBlockCipher;
import org.bouncycastle.crypto.modes.CFBBlockCipher;
import org.bouncycastle.crypto.modes.CTSBlockCipher;
import org.bouncycastle.crypto.modes.EAXBlockCipher;
import org.bouncycastle.crypto.modes.NISTCTSBlockCipher;
import org.bouncycastle.crypto.modes.OCBBlockCipher;
import org.bouncycastle.crypto.modes.OFBBlockCipher;
import org.bouncycastle.crypto.modes.SICBlockCipher;
import org.bouncycastle.crypto.paddings.PKCS7Padding;
import org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher;
import org.bouncycastle.crypto.params.KeyParameter;
import org.bouncycastle.crypto.params.ParametersWithIV;
import org.bouncycastle.util.Arrays;
import org.bouncycastle.util.test.SimpleTest;
public class CipherStreamTest
extends SimpleTest
{
private int streamSize;
public String getName()
{
return "CipherStreamTest";
}
private void testMode(Object cipher, CipherParameters params)
throws Exception
{
testWriteRead(cipher, params, false);
testWriteRead(cipher, params, true);
testReadWrite(cipher, params, false);
testReadWrite(cipher, params, true);
if (!(cipher instanceof CTSBlockCipher || cipher instanceof NISTCTSBlockCipher))
{
testWriteReadEmpty(cipher, params, false);
testWriteReadEmpty(cipher, params, true);
}
if (cipher instanceof AEADBlockCipher)
{
testTamperedRead((AEADBlockCipher)cipher, params);
testTruncatedRead((AEADBlockCipher)cipher, params);
testTamperedWrite((AEADBlockCipher)cipher, params);
}
}
private OutputStream createCipherOutputStream(OutputStream output, Object cipher)
{
if (cipher instanceof BufferedBlockCipher)
{
return new CipherOutputStream(output, (BufferedBlockCipher)cipher);
}
else if (cipher instanceof AEADBlockCipher)
{
return new CipherOutputStream(output, (AEADBlockCipher)cipher);
}
else
{
return new CipherOutputStream(output, (StreamCipher)cipher);
}
}
private InputStream createCipherInputStream(byte[] data, Object cipher)
{
ByteArrayInputStream input = new ByteArrayInputStream(data);
if (cipher instanceof BufferedBlockCipher)
{
return new CipherInputStream(input, (BufferedBlockCipher)cipher);
}
else if (cipher instanceof AEADBlockCipher)
{
return new CipherInputStream(input, (AEADBlockCipher)cipher);
}
else
{
return new CipherInputStream(input, (StreamCipher)cipher);
}
}
/**
* Test tampering of ciphertext followed by read from decrypting CipherInputStream
*/
private void testTamperedRead(AEADBlockCipher cipher, CipherParameters params)
throws Exception
{
cipher.init(true, params);
byte[] ciphertext = new byte[cipher.getOutputSize(streamSize)];
cipher.doFinal(ciphertext, cipher.processBytes(new byte[streamSize], 0, streamSize, ciphertext, 0));
// Tamper
ciphertext[0] += 1;
cipher.init(false, params);
InputStream input = createCipherInputStream(ciphertext, cipher);
try
{
while (input.read() >= 0)
{
}
fail("Expected invalid ciphertext after tamper and read : " + cipher.getAlgorithmName());
}
catch (InvalidCipherTextIOException e)
{
// Expected
}
try
{
input.close();
}
catch (Exception e)
{
fail("Unexpected exception after tamper and read : " + cipher.getAlgorithmName());
}
}
/**
* Test truncation of ciphertext to make tag calculation impossible, followed by read from
* decrypting CipherInputStream
*/
private void testTruncatedRead(AEADBlockCipher cipher, CipherParameters params)
throws Exception
{
cipher.init(true, params);
byte[] ciphertext = new byte[cipher.getOutputSize(streamSize)];
cipher.doFinal(ciphertext, cipher.processBytes(new byte[streamSize], 0, streamSize, ciphertext, 0));
// Truncate to just smaller than complete tag
byte[] truncated = new byte[ciphertext.length - streamSize - 1];
System.arraycopy(ciphertext, 0, truncated, 0, truncated.length);
cipher.init(false, params);
InputStream input = createCipherInputStream(truncated, cipher);
while (true)
{
int read = 0;
try
{
read = input.read();
}
catch (InvalidCipherTextIOException e)
{
// Expected
break;
}
catch (Exception e)
{
fail("Unexpected exception on truncated read : " + cipher.getAlgorithmName());
break;
}
if (read < 0)
{
fail("Expected invalid ciphertext after truncate and read : " + cipher.getAlgorithmName());
break;
}
}
try
{
input.close();
}
catch (Exception e)
{
fail("Unexpected exception after truncate and read : " + cipher.getAlgorithmName());
}
}
/**
* Test tampering of ciphertext followed by write to decrypting CipherOutputStream
*/
private void testTamperedWrite(AEADBlockCipher cipher, CipherParameters params)
throws Exception
{
cipher.init(true, params);
byte[] ciphertext = new byte[cipher.getOutputSize(streamSize)];
cipher.doFinal(ciphertext, cipher.processBytes(new byte[streamSize], 0, streamSize, ciphertext, 0));
// Tamper
ciphertext[0] += 1;
cipher.init(false, params);
ByteArrayOutputStream plaintext = new ByteArrayOutputStream();
OutputStream output = createCipherOutputStream(plaintext, cipher);
for (int i = 0; i < ciphertext.length; i++)
{
output.write(ciphertext[i]);
}
try
{
output.close();
fail("Expected invalid ciphertext after tamper and write : " + cipher.getAlgorithmName());
}
catch (InvalidCipherTextIOException e)
{
// Expected
}
}
/**
* Test CipherOutputStream in ENCRYPT_MODE, CipherInputStream in DECRYPT_MODE
*/
private void testWriteRead(Object cipher, CipherParameters params, boolean blocks)
throws Exception
{
byte[] data = new byte[streamSize];
for (int i = 0; i < data.length; i++)
{
data[i] = (byte)(i % 255);
}
testWriteRead(cipher, params, blocks, data);
}
/**
* Test CipherOutputStream in ENCRYPT_MODE, CipherInputStream in DECRYPT_MODE
*/
private void testWriteReadEmpty(Object cipher, CipherParameters params, boolean blocks)
throws Exception
{
byte[] data = new byte[0];
testWriteRead(cipher, params, blocks, data);
}
private void testWriteRead(Object cipher, CipherParameters params, boolean blocks, byte[] data)
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
try
{
init(cipher, true, params);
OutputStream cOut = createCipherOutputStream(bOut, cipher);
if (blocks)
{
int chunkSize = Math.max(1, data.length / 8);
for (int i = 0; i < data.length; i += chunkSize)
{
cOut.write(data, i, Math.min(chunkSize, data.length - i));
}
}
else
{
for (int i = 0; i < data.length; i++)
{
cOut.write(data[i]);
}
}
cOut.close();
byte[] cipherText = bOut.toByteArray();
bOut.reset();
init(cipher, false, params);
InputStream cIn = createCipherInputStream(cipherText, cipher);
if (blocks)
{
byte[] block = new byte[getBlockSize(cipher) + 1];
int c;
while ((c = cIn.read(block)) >= 0)
{
bOut.write(block, 0, c);
}
}
else
{
int c;
while ((c = cIn.read()) >= 0)
{
bOut.write(c);
}
}
cIn.close();
}
catch (Exception e)
{
fail("Unexpected exception " + getName(cipher), e);
}
byte[] decrypted = bOut.toByteArray();
if (!Arrays.areEqual(data, decrypted))
{
fail("Failed - decrypted data doesn't match: " + getName(cipher));
}
}
private String getName(Object cipher)
{
if (cipher instanceof BufferedBlockCipher)
{
return ((BufferedBlockCipher)cipher).getUnderlyingCipher().getAlgorithmName();
}
else if (cipher instanceof AEADBlockCipher)
{
return ((AEADBlockCipher)cipher).getUnderlyingCipher().getAlgorithmName();
}
else if (cipher instanceof StreamCipher)
{
return ((StreamCipher)cipher).getAlgorithmName();
}
return null;
}
private int getBlockSize(Object cipher)
{
if (cipher instanceof BlockCipher)
{
return ((BlockCipher)cipher).getBlockSize();
}
else if (cipher instanceof BufferedBlockCipher)
{
return ((BufferedBlockCipher)cipher).getBlockSize();
}
else if (cipher instanceof AEADBlockCipher)
{
return ((AEADBlockCipher)cipher).getUnderlyingCipher().getBlockSize();
}
else if (cipher instanceof StreamCipher)
{
return 1;
}
return 0;
}
private void init(Object cipher, boolean forEncrypt, CipherParameters params)
{
if (cipher instanceof BufferedBlockCipher)
{
((BufferedBlockCipher)cipher).init(forEncrypt, params);
}
else if (cipher instanceof AEADBlockCipher)
{
((AEADBlockCipher)cipher).init(forEncrypt, params);
}
else if (cipher instanceof StreamCipher)
{
((StreamCipher)cipher).init(forEncrypt, params);
}
}
protected void fail(String message, boolean authenticated, boolean bc)
{
if (bc || !authenticated)
{
super.fail(message);
}
else
{
// javax.crypto.CipherInputStream/CipherOutputStream
// are broken wrt handling AEAD failures
System.err.println("Broken JCE Streams: " + message);
}
}
/**
* Test CipherInputStream in ENCRYPT_MODE, CipherOutputStream in DECRYPT_MODE
*/
private void testReadWrite(Object cipher, CipherParameters params, boolean blocks)
throws Exception
{
String lCode = "ABCDEFGHIJKLMNOPQRSTU";
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
try
{
init(cipher, true, params);
InputStream cIn = createCipherInputStream(lCode.getBytes(), cipher);
ByteArrayOutputStream ct = new ByteArrayOutputStream();
if (blocks)
{
byte[] block = new byte[getBlockSize(cipher) + 1];
int c;
while ((c = cIn.read(block)) >= 0)
{
ct.write(block, 0, c);
}
}
else
{
int c;
while ((c = cIn.read()) >= 0)
{
ct.write(c);
}
}
cIn.close();
init(cipher, false, params);
ByteArrayInputStream dataIn = new ByteArrayInputStream(ct.toByteArray());
OutputStream cOut = createCipherOutputStream(bOut, cipher);
if (blocks)
{
byte[] block = new byte[getBlockSize(cipher) + 1];
int c;
while ((c = dataIn.read(block)) >= 0)
{
cOut.write(block, 0, c);
}
}
else
{
int c;
while ((c = dataIn.read()) >= 0)
{
cOut.write(c);
}
}
cOut.flush();
cOut.close();
}
catch (Exception e)
{
fail("Unexpected exception " + getName(cipher), e);
}
String res = new String(bOut.toByteArray());
if (!res.equals(lCode))
{
fail("Failed read/write - decrypted data doesn't match: " + getName(cipher), lCode, res);
}
}
public void performTest()
throws Exception
{
int[] testSizes = new int[]{0, 1, 7, 8, 9, 15, 16, 17, 1023, 1024, 1025, 2047, 2048, 2049, 4095, 4096, 4097};
for (int i = 0; i < testSizes.length; i++)
{
this.streamSize = testSizes[i];
performTests();
}
}
private void performTests()
throws Exception
{
testModes(new BlowfishEngine(), new BlowfishEngine(), 16);
testModes(new DESEngine(), new DESEngine(), 8);
testModes(new DESedeEngine(), new DESedeEngine(), 24);
testModes(new TEAEngine(), new TEAEngine(), 16);
testModes(new CAST5Engine(), new CAST5Engine(), 16);
testModes(new RC2Engine(), new RC2Engine(), 16);
testModes(new XTEAEngine(), new XTEAEngine(), 16);
testModes(new AESEngine(), new AESEngine(), 16);
testModes(new NoekeonEngine(), new NoekeonEngine(), 16);
testModes(new TwofishEngine(), new TwofishEngine(), 16);
testModes(new CAST6Engine(), new CAST6Engine(), 16);
testModes(new SEEDEngine(), new SEEDEngine(), 16);
testModes(new SerpentEngine(), new SerpentEngine(), 16);
testModes(new RC6Engine(), new RC6Engine(), 16);
testModes(new CamelliaEngine(), new CamelliaEngine(), 16);
testModes(new ThreefishEngine(ThreefishEngine.BLOCKSIZE_512),
new ThreefishEngine(ThreefishEngine.BLOCKSIZE_512), 64);
testMode(new RC4Engine(), new KeyParameter(new byte[16]));
testMode(new Salsa20Engine(), new ParametersWithIV(new KeyParameter(new byte[16]), new byte[8]));
testMode(new XSalsa20Engine(), new ParametersWithIV(new KeyParameter(new byte[32]), new byte[24]));
testMode(new ChaChaEngine(), new ParametersWithIV(new KeyParameter(new byte[16]), new byte[8]));
testMode(new Grainv1Engine(), new ParametersWithIV(new KeyParameter(new byte[16]), new byte[8]));
testMode(new Grain128Engine(), new ParametersWithIV(new KeyParameter(new byte[16]), new byte[12]));
testMode(new HC128Engine(), new KeyParameter(new byte[16]));
testMode(new HC256Engine(), new ParametersWithIV(new KeyParameter(new byte[16]), new byte[16]));
testSkipping(new Salsa20Engine(), new ParametersWithIV(new KeyParameter(new byte[16]), new byte[8]));
testSkipping(new SICBlockCipher(new AESEngine()), new ParametersWithIV(new KeyParameter(new byte[16]), new byte[16]));
}
private void testModes(BlockCipher cipher1, BlockCipher cipher2, int keySize)
throws Exception
{
final KeyParameter key = new KeyParameter(new byte[keySize]);
final int blockSize = getBlockSize(cipher1);
final CipherParameters withIv = new ParametersWithIV(key, new byte[blockSize]);
if (blockSize > 1)
{
testMode(new PaddedBufferedBlockCipher(cipher1, new PKCS7Padding()), key);
testMode(new PaddedBufferedBlockCipher(new CBCBlockCipher(cipher1), new PKCS7Padding()), withIv);
testMode(new BufferedBlockCipher(new OFBBlockCipher(cipher1, blockSize)), withIv);
testMode(new BufferedBlockCipher(new CFBBlockCipher(cipher1, blockSize)), withIv);
testMode(new BufferedBlockCipher(new SICBlockCipher(cipher1)), withIv);
}
// CTS requires at least one block
if (blockSize <= 16 && streamSize >= blockSize)
{
testMode(new CTSBlockCipher(cipher1), key);
}
if (blockSize <= 16 && streamSize >= blockSize)
{
testMode(new NISTCTSBlockCipher(NISTCTSBlockCipher.CS1, cipher1), key);
testMode(new NISTCTSBlockCipher(NISTCTSBlockCipher.CS2, cipher1), key);
testMode(new NISTCTSBlockCipher(NISTCTSBlockCipher.CS3, cipher1), key);
}
if (blockSize == 8 || blockSize == 16)
{
testMode(new EAXBlockCipher(cipher1), withIv);
}
if (blockSize == 16)
{
testMode(new CCMBlockCipher(cipher1), new ParametersWithIV(key, new byte[7]));
// TODO: need to have a GCM safe version of testMode.
// testMode(new GCMBlockCipher(cipher1), withIv);
testMode(new OCBBlockCipher(cipher1, cipher2), new ParametersWithIV(key, new byte[15]));
}
}
private void testSkipping(StreamCipher cipher, CipherParameters params)
throws Exception
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
init(cipher, true, params);
OutputStream cOut = createCipherOutputStream(bOut, cipher);
byte[] data = new byte[5000];
new SecureRandom().nextBytes(data);
cOut.write(data);
cOut.close();
init(cipher, false, params);
InputStream cIn = createCipherInputStream(bOut.toByteArray(), cipher);
long skip = cIn.skip(50);
if (skip != 50)
{
fail("wrong number of bytes skipped: " + skip);
}
byte[] block = new byte[50];
cIn.read(block);
if (!areEqual(data, 50, block, 0))
{
fail("initial skip mismatch");
}
skip = cIn.skip(3000);
if (skip != 3000)
{
fail("wrong number of bytes skipped: " + skip);
}
cIn.read(block);
if (!areEqual(data, 3100, block, 0))
{
fail("second skip mismatch");
}
cipher.reset();
cIn = createCipherInputStream(bOut.toByteArray(), cipher);
if (!cIn.markSupported())
{
fail("marking not supported");
}
cIn.mark(100);
cIn.read(block);
if (!areEqual(data, 0, block, 0))
{
fail("initial mark read failed");
}
cIn.reset();
cIn.read(block);
if (!areEqual(data, 0, block, 0))
{
fail(cipher.getAlgorithmName() + " initial reset read failed");
}
cIn.reset();
cIn.read(block);
cIn.mark(100);
cIn.read(block);
if (!areEqual(data, 50, block, 0))
{
fail("second mark read failed");
}
cIn.reset();
cIn.read(block);
if (!areEqual(data, 50, block, 0))
{
fail(cipher.getAlgorithmName() + " second reset read failed");
}
cIn.mark(3000);
skip = cIn.skip(2050);
if (skip != 2050)
{
fail("wrong number of bytes skipped: " + skip);
}
cIn.reset();
cIn.read(block);
if (!areEqual(data, 100, block, 0))
{
fail(cipher.getAlgorithmName() + " third reset read failed");
}
cIn.read(new byte[2150]);
cIn.reset();
cIn.read(block);
if (!areEqual(data, 100, block, 0))
{
fail(cipher.getAlgorithmName() + " fourth reset read failed");
}
cIn.close();
}
private boolean areEqual(byte[] a, int aOff, byte[] b, int bOff)
{
for (int i = bOff; i != b.length; i++)
{
if (a[aOff + i - bOff] != b[i])
{
return false;
}
}
return true;
}
public static void main(String[] args)
{
runTest(new CipherStreamTest());
}
}