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package org.spongycastle.crypto.test;
import org.spongycastle.crypto.BlockCipher;
import org.spongycastle.crypto.engines.DESEngine;
import org.spongycastle.crypto.modes.CFBBlockCipher;
import org.spongycastle.crypto.modes.OFBBlockCipher;
import org.spongycastle.crypto.params.KeyParameter;
import org.spongycastle.crypto.params.ParametersWithIV;
import org.spongycastle.util.encoders.Hex;
import org.spongycastle.util.test.SimpleTestResult;
import org.spongycastle.util.test.Test;
import org.spongycastle.util.test.TestResult;
/**
* CFB/OFB Mode test of IV padding.
*/
public class ModeTest
implements Test
{
public ModeTest()
{
}
private boolean isEqualTo(
byte[] a,
byte[] b)
{
for (int i = 0; i != a.length; i++)
{
if (a[i] != b[i])
{
return false;
}
}
return true;
}
public TestResult perform()
{
KeyParameter key = new KeyParameter(Hex.decode("0011223344556677"));
byte[] input = Hex.decode("4e6f7720");
byte[] out1 = new byte[4];
byte[] out2 = new byte[4];
BlockCipher ofb = new OFBBlockCipher(new DESEngine(), 32);
ofb.init(true, new ParametersWithIV(key, Hex.decode("1122334455667788")));
ofb.processBlock(input, 0, out1, 0);
ofb.init(false, new ParametersWithIV(key, Hex.decode("1122334455667788")));
ofb.processBlock(out1, 0, out2, 0);
if (!isEqualTo(out2, input))
{
return new SimpleTestResult(false, getName() + ": test 1 - in != out");
}
ofb.init(true, new ParametersWithIV(key, Hex.decode("11223344")));
ofb.processBlock(input, 0, out1, 0);
ofb.init(false, new ParametersWithIV(key, Hex.decode("0000000011223344")));
ofb.processBlock(out1, 0, out2, 0);
if (!isEqualTo(out2, input))
{
return new SimpleTestResult(false, getName() + ": test 2 - in != out");
}
BlockCipher cfb = new CFBBlockCipher(new DESEngine(), 32);
cfb.init(true, new ParametersWithIV(key, Hex.decode("1122334455667788")));
cfb.processBlock(input, 0, out1, 0);
cfb.init(false, new ParametersWithIV(key, Hex.decode("1122334455667788")));
cfb.processBlock(out1, 0, out2, 0);
if (!isEqualTo(out2, input))
{
return new SimpleTestResult(false, getName() + ": test 3 - in != out");
}
cfb.init(true, new ParametersWithIV(key, Hex.decode("11223344")));
cfb.processBlock(input, 0, out1, 0);
cfb.init(false, new ParametersWithIV(key, Hex.decode("0000000011223344")));
cfb.processBlock(out1, 0, out2, 0);
if (!isEqualTo(out2, input))
{
return new SimpleTestResult(false, getName() + ": test 4 - in != out");
}
return new SimpleTestResult(true, getName() + ": Okay");
}
public String getName()
{
return "ModeTest";
}
public static void main(
String[] args)
{
ModeTest test = new ModeTest();
TestResult result = test.perform();
System.out.println(result);
}
}
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