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package org.spongycastle.jce.provider.test;
import java.security.NoSuchAlgorithmException;
import java.security.Security;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.Mac;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import org.spongycastle.jce.provider.BouncyCastleProvider;
import org.spongycastle.util.Arrays;
import org.spongycastle.util.encoders.Hex;
import org.spongycastle.util.test.SimpleTest;
import org.spongycastle.util.test.TestFailedException;
public class GMacTest
extends SimpleTest
{
public String getName()
{
return "GMac";
}
public void performTest()
throws Exception
{
checkRegistrations();
}
private void checkRegistrations()
throws Exception
{
List missingMacs = new ArrayList();
List missingKeyGens = new ArrayList();
String[] ciphers = new String[] { "AES", "NOEKEON", "Twofish", "CAST6", "SEED", "Serpent", "RC6", "CAMELLIA" };
String[] macs = new String[]
{
"a52308801b32d4770c701ace9b826f12",
"cf11dacaf6024a78dba76b256e23caab",
"13db7c428e5a7128149b5ec782d07fac",
"d13a33e78e48b274bf7d64bf9aecdb82",
"d05d550054735c6e7e01b6981fc14b4e",
"4a34dfe4f5410afd7c40b1e110377a73",
"d9f597c96b41f641da6c83d4760f543b",
"371ad8cc920c6bda2a26d8f237bd446b"
};
for (int i = 0; i < ciphers.length; i++)
{
String cipherName = ciphers[i];
Cipher cipher;
try
{
cipher = Cipher.getInstance(cipherName, "SC");
}
catch (Exception e)
{
System.err.println(cipherName + ": " + e.getMessage());
continue;
}
int blocksize;
try
{
blocksize = cipher.getBlockSize();
}
catch (Exception e)
{
System.err.println(cipherName + ": " + e.getMessage());
continue;
}
// GCM is defined over 128 bit block ciphers
if (blocksize == 16)
{
String macName = cipherName + "-GMAC";
String macNameAlt = cipherName + "GMAC";
// Check we have a GMAC registered for each name
checkMac(macName, missingMacs, missingKeyGens, macs[i]);
checkMac(macNameAlt, missingMacs, missingKeyGens, macs[i]);
}
}
if (missingMacs.size() != 0)
{
fail("Did not find GMAC registrations for the following ciphers: " + missingMacs);
}
if (missingKeyGens.size() != 0)
{
fail("Did not find GMAC KeyGenerator registrations for the following macs: " + missingKeyGens);
}
}
private void checkMac(String name, List missingMacs, List missingKeyGens, String macOutput)
{
try
{
Mac mac = Mac.getInstance(name);
mac.init(new SecretKeySpec(new byte[mac.getMacLength()], mac.getAlgorithm()), new IvParameterSpec(
new byte[16]));
mac.update(new byte[128]);
byte[] bytes = mac.doFinal();
if (!Arrays.areEqual(bytes, Hex.decode(macOutput)))
{
fail("wrong mac value computed for " + name);
}
try
{
KeyGenerator kg = KeyGenerator.getInstance(name);
kg.generateKey();
}
catch (NoSuchAlgorithmException e)
{
missingKeyGens.add(name);
}
}
catch (NoSuchAlgorithmException e)
{
missingMacs.add(name);
}
catch (TestFailedException e)
{
throw e;
}
catch (Exception e)
{
fail("Unexpected error", e);
}
}
public static void main(String[] args)
{
Security.addProvider(new BouncyCastleProvider());
runTest(new GMacTest());
}
}
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