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package org.spongycastle.jce.provider.test;
import java.security.Key;
import java.security.Security;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import org.spongycastle.jce.provider.BouncyCastleProvider;
import org.spongycastle.util.test.SimpleTestResult;
import org.spongycastle.util.test.Test;
import org.spongycastle.util.test.TestResult;
/**
* check that doFinal is properly reseting the cipher.
*/
public class DoFinalTest
implements Test
{
public DoFinalTest()
{
}
private boolean equalArray(
byte[] a,
int aOff,
byte[] b,
int length)
{
if (aOff + a.length < length)
{
return false;
}
if (b.length < length)
{
return false;
}
for (int i = 0; i != length; i++)
{
if (a[aOff + i] != b[i])
{
return false;
}
}
return true;
}
public TestResult checkCipher(
String cipherName)
{
String lCode = "ABCDEFGHIJKLMNOPQRSTUVWXY0123456789";
String baseAlgorithm;
int index = cipherName.indexOf('/');
if (index > 0)
{
baseAlgorithm = cipherName.substring(0, index);
}
else
{
baseAlgorithm = cipherName;
}
try
{
KeyGenerator kGen = KeyGenerator.getInstance(baseAlgorithm, "SC");
Cipher cipher = Cipher.getInstance(cipherName, "SC");
Key key = kGen.generateKey();
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] encrypted = cipher.doFinal(lCode.getBytes());
// 2nd try
byte[] encrypted2 = cipher.doFinal(lCode.getBytes());
if (encrypted.length != encrypted2.length)
{
return new SimpleTestResult(false, getName() + ": Failed " + cipherName + " - expected length " + encrypted.length + " got " + encrypted2.length);
}
if (!equalArray(encrypted, 0, encrypted2, encrypted.length))
{
return new SimpleTestResult(false, getName() + ": Failed " + cipherName + " - first two arrays not equal");
}
// 3rd try
byte[] enc1 = cipher.update(lCode.getBytes());
byte[] enc2 = cipher.doFinal();
if ((enc1.length + enc2.length) != encrypted.length)
{
return new SimpleTestResult(false, getName() + ": Failed " + cipherName + " - expected length " + encrypted.length + " got " + (enc1.length + enc2.length));
}
if (!equalArray(encrypted, 0, enc1, enc1.length))
{
return new SimpleTestResult(false, getName() + ": Failed " + cipherName + " - enc1 array not equal");
}
if (!equalArray(encrypted, enc1.length, enc2, enc2.length))
{
return new SimpleTestResult(false, getName() + ": Failed " + cipherName + " - enc1 array not equal");
}
enc1 = cipher.update(lCode.getBytes());
if (!equalArray(encrypted, 0, enc1, enc1.length))
{
return new SimpleTestResult(false, getName() + ": Failed " + cipherName + " - 2nd enc1 array not equal");
}
int len = cipher.doFinal(enc1, 0);
if ((enc1.length + len) != encrypted.length)
{
return new SimpleTestResult(false, getName() + ": Failed " + cipherName + " - expected length " + encrypted.length + " got " + (enc1.length + len));
}
}
catch (Exception e)
{
return new SimpleTestResult(false, getName() + ": Failed " + cipherName + " - exception " + e.toString());
}
return new SimpleTestResult(true, getName() + ": Okay");
}
public TestResult perform()
{
TestResult result = checkCipher("RC4");
if (!result.isSuccessful())
{
return result;
}
result = checkCipher("DES/CBC/PKCS5Padding");
if (!result.isSuccessful())
{
return result;
}
return checkCipher("Rijndael");
}
public String getName()
{
return "DoFinalTest";
}
public static void main(
String[] args)
{
Security.addProvider(new BouncyCastleProvider());
Test test = new DoFinalTest();
TestResult result = test.perform();
System.out.println(result.toString());
}
}
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