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package org.bouncycastle.crypto.test;
import org.bouncycastle.crypto.BlockCipher;
import org.bouncycastle.crypto.BufferedBlockCipher;
import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.crypto.DataLengthException;
import org.bouncycastle.crypto.InvalidCipherTextException;
import org.bouncycastle.crypto.engines.AESEngine;
import org.bouncycastle.crypto.engines.DESEngine;
import org.bouncycastle.crypto.engines.SkipjackEngine;
import org.bouncycastle.crypto.modes.CBCBlockCipher;
import org.bouncycastle.crypto.modes.CTSBlockCipher;
import org.bouncycastle.crypto.modes.OldCTSBlockCipher;
import org.bouncycastle.crypto.modes.SICBlockCipher;
import org.bouncycastle.crypto.params.KeyParameter;
import org.bouncycastle.crypto.params.ParametersWithIV;
import org.bouncycastle.util.encoders.Hex;
import org.bouncycastle.util.test.SimpleTest;
/**
* CTS tester
*/
public class CTSTest
extends SimpleTest
{
static byte[] in1 = Hex.decode("4e6f7720697320746865207420");
static byte[] in2 = Hex.decode("000102030405060708090a0b0c0d0e0fff0102030405060708090a0b0c0d0e0f0aaa");
static byte[] out1 = Hex.decode("9952f131588465033fa40e8a98");
static byte[] out2 = Hex.decode("358f84d01eb42988dc34efb994");
static byte[] out3 = Hex.decode("170171cfad3f04530c509b0c1f0be0aefbd45a8e3755a873bff5ea198504b71683c6");
private void testCTS(
int id,
BlockCipher cipher,
CipherParameters params,
byte[] input,
byte[] output)
throws Exception
{
byte[] out = new byte[input.length];
BufferedBlockCipher engine = new CTSBlockCipher(cipher);
engine.init(true, params);
int len = engine.processBytes(input, 0, input.length, out, 0);
engine.doFinal(out, len);
if (!areEqual(output, out))
{
fail("failed encryption expected " + new String(Hex.encode(output)) + " got " + new String(Hex.encode(out)));
}
engine.init(false, params);
len = engine.processBytes(output, 0, output.length, out, 0);
engine.doFinal(out, len);
if (!areEqual(input, out))
{
fail("failed decryption expected " + new String(Hex.encode(input)) + " got " + new String(Hex.encode(out)));
}
}
private void testOldCTS(
int id,
BlockCipher cipher,
CipherParameters params,
byte[] input,
byte[] output)
throws Exception
{
byte[] out = new byte[input.length];
BufferedBlockCipher engine = new OldCTSBlockCipher(cipher);
engine.init(true, params);
int len = engine.processBytes(input, 0, input.length, out, 0);
engine.doFinal(out, len);
if (!areEqual(output, out))
{
fail("failed encryption expected " + new String(Hex.encode(output)) + " got " + new String(Hex.encode(out)));
}
engine.init(false, params);
len = engine.processBytes(output, 0, output.length, out, 0);
engine.doFinal(out, len);
if (!areEqual(input, out))
{
fail("failed decryption expected " + new String(Hex.encode(input)) + " got " + new String(Hex.encode(out)));
}
}
private void testExceptions() throws InvalidCipherTextException
{
BufferedBlockCipher engine = new CTSBlockCipher(new DESEngine());
CipherParameters params = new KeyParameter(new byte[engine.getBlockSize()]);
engine.init(true, params);
byte[] out = new byte[engine.getOutputSize(engine.getBlockSize())];
engine.processBytes(new byte[engine.getBlockSize() - 1], 0, engine.getBlockSize() - 1, out, 0);
try
{
engine.doFinal(out, 0);
fail("Expected CTS encrypt error on < 1 block input");
} catch(DataLengthException e)
{
// Expected
}
engine.init(true, params);
engine.processBytes(new byte[engine.getBlockSize()], 0, engine.getBlockSize(), out, 0);
try
{
engine.doFinal(out, 0);
} catch(DataLengthException e)
{
fail("Unexpected CTS encrypt error on == 1 block input");
}
engine.init(false, params);
engine.processBytes(new byte[engine.getBlockSize() - 1], 0, engine.getBlockSize() - 1, out, 0);
try
{
engine.doFinal(out, 0);
fail("Expected CTS decrypt error on < 1 block input");
} catch(DataLengthException e)
{
// Expected
}
engine.init(false, params);
engine.processBytes(new byte[engine.getBlockSize()], 0, engine.getBlockSize(), out, 0);
try
{
engine.doFinal(out, 0);
} catch(DataLengthException e)
{
fail("Unexpected CTS decrypt error on == 1 block input");
}
try
{
new CTSBlockCipher(new SICBlockCipher(new AESEngine()));
fail("Expected CTS construction error - only ECB/CBC supported.");
} catch(IllegalArgumentException e)
{
// Expected
}
}
public String getName()
{
return "CTS";
}
public void performTest()
throws Exception
{
byte[] key1 = { (byte)0x01, (byte)0x23, (byte)0x45, (byte)0x67, (byte)0x89, (byte)0xAB, (byte)0xCD, (byte)0xEF };
byte[] key2 = { (byte)0x01, (byte)0x23, (byte)0x45, (byte)0x67, (byte)0x89, (byte)0xAB, (byte)0xCD, (byte)0xEF, (byte)0xee, (byte)0xff };
byte[] iv = { 1, 2, 3, 4, 5, 6, 7, 8 };
testCTS(1, new DESEngine(), new KeyParameter(key1), in1, out1);
testCTS(2, new CBCBlockCipher(new DESEngine()), new ParametersWithIV(new KeyParameter(key1), iv), in1, out2);
testCTS(3, new CBCBlockCipher(new SkipjackEngine()), new ParametersWithIV(new KeyParameter(key2), iv), in2, out3);
//
// test vectors from rfc3962
//
byte[] aes128 = Hex.decode("636869636b656e207465726979616b69");
byte[] aesIn1 = Hex.decode("4920776f756c64206c696b652074686520");
byte[] aesOut1 = Hex.decode("c6353568f2bf8cb4d8a580362da7ff7f97");
byte[] aesIn2 = Hex.decode("4920776f756c64206c696b65207468652047656e6572616c20476175277320");
byte[] aesOut2 = Hex.decode("fc00783e0efdb2c1d445d4c8eff7ed2297687268d6ecccc0c07b25e25ecfe5");
byte[] aesIn3 = Hex.decode("4920776f756c64206c696b65207468652047656e6572616c2047617527732043");
byte[] aesOut3 = Hex.decode("39312523a78662d5be7fcbcc98ebf5a897687268d6ecccc0c07b25e25ecfe584");
testCTS(4, new CBCBlockCipher(new AESEngine()), new ParametersWithIV(new KeyParameter(aes128), new byte[16]), aesIn1, aesOut1);
testCTS(5, new CBCBlockCipher(new AESEngine()), new ParametersWithIV(new KeyParameter(aes128), new byte[16]), aesIn2, aesOut2);
testCTS(6, new CBCBlockCipher(new AESEngine()), new ParametersWithIV(new KeyParameter(aes128), new byte[16]), aesIn3, aesOut3);
testOldCTS(4, new CBCBlockCipher(new AESEngine()), new ParametersWithIV(new KeyParameter(aes128), new byte[16]), aesIn1, aesOut1);
testOldCTS(5, new CBCBlockCipher(new AESEngine()), new ParametersWithIV(new KeyParameter(aes128), new byte[16]), aesIn2, aesOut2);
testOldCTS(6, new CBCBlockCipher(new AESEngine()), new ParametersWithIV(new KeyParameter(aes128), new byte[16]), aesIn3, aesOut3);
byte[] aes1Block = Hex.decode("4920776f756c64206c696b6520746865");
byte[] preErrata = Hex.decode("e7664c13ff28c965b0d2a0e7ec353706"); // CTS style one block
byte[] pstErrata = Hex.decode("97687268d6ecccc0c07b25e25ecfe584"); // CBC style one block
byte[] pstErrataNonZeroIV = Hex.decode("571f5108c53fe95ab52df783df933fa3");
testCTS(7, new CBCBlockCipher(new AESEngine()), new ParametersWithIV(new KeyParameter(aes128), new byte[16]), aes1Block, pstErrata);
testCTS(8, new CBCBlockCipher(new AESEngine()), new ParametersWithIV(new KeyParameter(aes128), aes1Block), aes1Block, pstErrataNonZeroIV);
testOldCTS(7, new CBCBlockCipher(new AESEngine()), new ParametersWithIV(new KeyParameter(aes128), new byte[16]), aes1Block, preErrata);
testExceptions();
}
public static void main(
String[] args)
{
runTest(new CTSTest());
}
}
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