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package org.bouncycastle.crypto.test;
import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.crypto.engines.VMPCEngine;
import org.bouncycastle.crypto.params.KeyParameter;
import org.bouncycastle.crypto.params.ParametersWithIV;
import org.bouncycastle.util.Arrays;
import org.bouncycastle.util.encoders.Hex;
import org.bouncycastle.util.test.SimpleTest;
/**
* VMPC Test
*/
public class VMPCTest extends SimpleTest
{
private static final byte[] input = new byte[1000000];
public String getName()
{
return "VMPC";
}
private void checkByte(byte[] array, int position, byte b)
{
if (array[position] != b)
{
fail("Fail on position " + position,
new String(Hex.encode(new byte[] { b })),
new String(Hex.encode(new byte[] { array[position] })));
}
}
public void performTest()
{
byte[] key = Hex.decode("9661410AB797D8A9EB767C21172DF6C7");
byte[] iv = Hex.decode("4B5C2F003E67F39557A8D26F3DA2B155");
CipherParameters kp = new KeyParameter(key);
CipherParameters kpwiv = new ParametersWithIV(kp, iv);
VMPCEngine engine = new VMPCEngine();
try
{
engine.init(true, kp);
fail("init failed to throw expected exception");
}
catch (IllegalArgumentException e)
{
// Expected
}
engine.init(true, kpwiv);
checkEngine(engine);
engine.reset();
byte[] output = checkEngine(engine);
engine.init(false, kpwiv);
byte[] recovered = new byte[output.length];
engine.processBytes(output, 0, output.length, recovered, 0);
if (!Arrays.areEqual(input, recovered))
{
fail("decrypted bytes differ from original bytes");
}
}
private byte[] checkEngine(VMPCEngine engine)
{
byte[] output = new byte[input.length];
engine.processBytes(input, 0, output.length, output, 0);
checkByte(output, 0, (byte) 0xA8);
checkByte(output, 1, (byte) 0x24);
checkByte(output, 2, (byte) 0x79);
checkByte(output, 3, (byte) 0xF5);
checkByte(output, 252, (byte) 0xB8);
checkByte(output, 253, (byte) 0xFC);
checkByte(output, 254, (byte) 0x66);
checkByte(output, 255, (byte) 0xA4);
checkByte(output, 1020, (byte) 0xE0);
checkByte(output, 1021, (byte) 0x56);
checkByte(output, 1022, (byte) 0x40);
checkByte(output, 1023, (byte) 0xA5);
checkByte(output, 102396, (byte) 0x81);
checkByte(output, 102397, (byte) 0xCA);
checkByte(output, 102398, (byte) 0x49);
checkByte(output, 102399, (byte) 0x9A);
return output;
}
public static void main(String[] args)
{
runTest(new VMPCTest());
}
}
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