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package org.bouncycastle.crypto.test;
import org.bouncycastle.crypto.BufferedBlockCipher;
import org.bouncycastle.crypto.DataLengthException;
import org.bouncycastle.crypto.InvalidCipherTextException;
import org.bouncycastle.crypto.engines.DESEngine;
import org.bouncycastle.crypto.params.KeyParameter;
import org.bouncycastle.util.encoders.Hex;
import org.bouncycastle.util.test.SimpleTest;
public class ResetTest
extends SimpleTest
{
private static final byte[] input = Hex.decode("4e6f77206973207468652074696d6520666f7220616c6c20");
private static final byte[] output = Hex.decode("3fa40e8a984d48156a271787ab8883f9893d51ec4b563b53");
public String getName()
{
return "Reset";
}
public void performTest()
throws Exception
{
BufferedBlockCipher cipher = new BufferedBlockCipher(new DESEngine());
KeyParameter param = new KeyParameter(Hex.decode("0123456789abcdef"));
basicTrial(cipher, param);
cipher.init(false, param);
byte[] out = new byte[input.length];
int len2 = cipher.processBytes(output, 0, output.length - 1, out, 0);
try
{
cipher.doFinal(out, len2);
fail("no DataLengthException - short input");
}
catch (DataLengthException e)
{
// ignore
}
len2 = cipher.processBytes(output, 0, output.length, out, 0);
cipher.doFinal(out, len2);
if (!areEqual(input, out))
{
fail("failed reversal one got " + new String(Hex.encode(out)));
}
len2 = cipher.processBytes(output, 0, output.length - 1, out, 0);
try
{
cipher.doFinal(out, len2);
fail("no DataLengthException - short output");
}
catch (DataLengthException e)
{
// ignore
}
len2 = cipher.processBytes(output, 0, output.length, out, 0);
cipher.doFinal(out, len2);
if (!areEqual(input, out))
{
fail("failed reversal two got " + new String(Hex.encode(out)));
}
}
private void basicTrial(BufferedBlockCipher cipher, KeyParameter param)
throws InvalidCipherTextException
{
cipher.init(true, param);
byte[] out = new byte[input.length];
int len1 = cipher.processBytes(input, 0, input.length, out, 0);
cipher.doFinal(out, len1);
if (!areEqual(out, output))
{
fail("failed - " + "expected " + new String(Hex.encode(output)) + " got " + new String(Hex.encode(out)));
}
}
public static void main(
String[] args)
{
runTest(new ResetTest());
}
}
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