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package org.spongycastle.crypto.test;
import org.spongycastle.crypto.CipherParameters;
import org.spongycastle.crypto.StreamCipher;
import org.spongycastle.crypto.engines.Grain128Engine;
import org.spongycastle.crypto.params.KeyParameter;
import org.spongycastle.crypto.params.ParametersWithIV;
import org.spongycastle.util.encoders.Hex;
import org.spongycastle.util.test.SimpleTest;
/**
* Grain-128 Test
*/
public class Grain128Test
extends SimpleTest
{
String keyStream1 = "f09b7bf7d7f6b5c2de2ffc73ac21397f";
String keyStream2 = "afb5babfa8de896b4b9c6acaf7c4fbfd";
public String getName()
{
return "Grain-128";
}
public void performTest()
{
Grain128Test1(new ParametersWithIV(new KeyParameter(Hex
.decode("00000000000000000000000000000000")), Hex
.decode("000000000000000000000000")));
Grain128Test2(new ParametersWithIV(new KeyParameter(Hex
.decode("0123456789abcdef123456789abcdef0")), Hex
.decode("0123456789abcdef12345678")));
Grain128Test3(new ParametersWithIV(new KeyParameter(Hex
.decode("0123456789abcdef123456789abcdef0")), Hex
.decode("0123456789abcdef12345678")));
}
private void Grain128Test1(CipherParameters params)
{
StreamCipher grain = new Grain128Engine();
byte[] in = new byte[16];
byte[] out = new byte[16];
grain.init(true, params);
grain.processBytes(in, 0, in.length, out, 0);
if (!areEqual(out, Hex.decode(keyStream1)))
{
mismatch("Keystream 1", keyStream1, out);
}
grain.reset();
grain.processBytes(in, 0, in.length, out, 0);
if (!areEqual(out, Hex.decode(keyStream1)))
{
mismatch("Keystream 1", keyStream1, out);
}
}
private void Grain128Test2(CipherParameters params)
{
StreamCipher grain = new Grain128Engine();
byte[] in = new byte[16];
byte[] out = new byte[16];
grain.init(true, params);
grain.processBytes(in, 0, in.length, out, 0);
if (!areEqual(out, Hex.decode(keyStream2)))
{
mismatch("Keystream 2", keyStream2, out);
}
grain.reset();
grain.processBytes(in, 0, in.length, out, 0);
if (!areEqual(out, Hex.decode(keyStream2)))
{
mismatch("Keystream 2", keyStream2, out);
}
}
private void Grain128Test3(CipherParameters params)
{
StreamCipher grain = new Grain128Engine();
byte[] in = "Encrypt me!".getBytes();
byte[] cipher = new byte[in.length];
byte[] clear = new byte[in.length];
grain.init(true, params);
grain.processBytes(in, 0, in.length, cipher, 0);
grain.reset();
grain.processBytes(cipher, 0, cipher.length, clear, 0);
if (!areEqual(in, clear))
{
mismatch("Test 3", new String(Hex.encode(in)), clear);
}
}
private void mismatch(String name, String expected, byte[] found)
{
fail("mismatch on " + name, expected, new String(Hex.encode(found)));
}
public static void main(String[] args)
{
runTest(new Grain128Test());
}
}
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