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package org.spongycastle.crypto.test;
import org.spongycastle.crypto.BlockCipher;
import org.spongycastle.crypto.InvalidCipherTextException;
import org.spongycastle.crypto.Wrapper;
import org.spongycastle.crypto.engines.DESEngine;
import org.spongycastle.crypto.engines.DESedeEngine;
import org.spongycastle.crypto.engines.RFC3211WrapEngine;
import org.spongycastle.crypto.modes.CBCBlockCipher;
import org.spongycastle.crypto.params.KeyParameter;
import org.spongycastle.crypto.params.ParametersWithIV;
import org.spongycastle.crypto.params.ParametersWithRandom;
import org.spongycastle.util.Arrays;
import org.spongycastle.util.encoders.Hex;
import org.spongycastle.util.test.SimpleTest;
import java.security.SecureRandom;
/**
* Wrap Test based on RFC3211 test vectors
*/
public class RFC3211WrapTest
extends SimpleTest
{
SecureRandom r1 = new SecureRandom()
{
int[] ints = { 0xC4, 0x36, 0xF5, 0x41 };
int count = 0;
public int nextInt()
{
return ints[count++];
}
};
SecureRandom r2 = new SecureRandom()
{
int[] ints = { 0xFA, 0x06, 0x0A, 0x45 };
int count = 0;
public int nextInt()
{
return ints[count++];
}
};
public String getName()
{
return "RFC3211Wrap";
}
private void wrapTest(
int id,
BlockCipher engine,
byte[] kek,
byte[] iv,
SecureRandom rand,
byte[] in,
byte[] out)
throws Exception
{
Wrapper wrapper = new RFC3211WrapEngine(engine);
wrapper.init(true, new ParametersWithRandom(new ParametersWithIV(new KeyParameter(kek), iv), rand));
byte[] cText = wrapper.wrap(in, 0, in.length);
if (!Arrays.areEqual(cText, out))
{
fail("failed wrap test " + id + " expected " + new String(Hex.encode(out)) + " got " + new String(Hex.encode(cText)));
}
wrapper.init(false, new ParametersWithIV(new KeyParameter(kek), iv));
byte[] pText = wrapper.unwrap(out, 0, out.length);
if (!Arrays.areEqual(pText, in))
{
fail("rfailed unwrap test " + id + " expected " + new String(Hex.encode(in)) + " got " + new String(Hex.encode(pText)));
}
}
private void testCorruption()
throws InvalidCipherTextException
{
byte[] kek = Hex.decode("D1DAA78615F287E6");
byte[] iv = Hex.decode("EFE598EF21B33D6D");
Wrapper wrapper = new RFC3211WrapEngine(new DESEngine());
wrapper.init(false, new ParametersWithIV(new KeyParameter(kek), iv));
byte[] block = Hex.decode("ff739D838C627C897323A2F8C436F541");
encryptBlock(kek, iv, block);
try
{
wrapper.unwrap(block, 0, block.length);
fail("bad length not detected");
}
catch (InvalidCipherTextException e)
{
if (!e.getMessage().equals("wrapped key corrupted"))
{
fail("wrong exception on length");
}
}
block = Hex.decode("08639D838C627C897323A2F8C436F541");
testChecksum(kek, iv, block, wrapper);
block = Hex.decode("08736D838C627C897323A2F8C436F541");
testChecksum(kek, iv, block, wrapper);
block = Hex.decode("08739D638C627C897323A2F8C436F541");
testChecksum(kek, iv, block, wrapper);
}
private void testChecksum(byte[] kek, byte[] iv, byte[] block, Wrapper wrapper)
{
encryptBlock(kek, iv, block);
try
{
wrapper.unwrap(block, 0, block.length);
fail("bad checksum not detected");
}
catch (InvalidCipherTextException e)
{
if (!e.getMessage().equals("wrapped key fails checksum"))
{
fail("wrong exception");
}
}
}
private void encryptBlock(byte[] key, byte[] iv, byte[] cekBlock)
{
BlockCipher engine = new CBCBlockCipher(new DESEngine());
engine.init(true, new ParametersWithIV(new KeyParameter(key), iv));
for (int i = 0; i < cekBlock.length; i += 8)
{
engine.processBlock(cekBlock, i, cekBlock, i);
}
for (int i = 0; i < cekBlock.length; i += 8)
{
engine.processBlock(cekBlock, i, cekBlock, i);
}
}
public void performTest()
throws Exception
{
wrapTest(1, new DESEngine(), Hex.decode("D1DAA78615F287E6"), Hex.decode("EFE598EF21B33D6D"), r1, Hex.decode("8C627C897323A2F8"), Hex.decode("B81B2565EE373CA6DEDCA26A178B0C10"));
wrapTest(2, new DESedeEngine(), Hex.decode("6A8970BF68C92CAEA84A8DF28510858607126380CC47AB2D"), Hex.decode("BAF1CA7931213C4E"), r2,
Hex.decode("8C637D887223A2F965B566EB014B0FA5D52300A3F7EA40FFFC577203C71BAF3B"),
Hex.decode("C03C514ABDB9E2C5AAC038572B5E24553876B377AAFB82ECA5A9D73F8AB143D9EC74E6CAD7DB260C"));
testCorruption();
Wrapper wrapper = new RFC3211WrapEngine(new DESEngine());
ParametersWithIV params = new ParametersWithIV(new KeyParameter(new byte[16]), new byte[16]);
byte[] buf = new byte[16];
try
{
wrapper.init(true, params);
wrapper.unwrap(buf, 0, buf.length);
fail("failed unwrap state test.");
}
catch (IllegalStateException e)
{
// expected
}
catch (InvalidCipherTextException e)
{
fail("unexpected exception: " + e, e);
}
try
{
wrapper.init(false, params);
wrapper.wrap(buf, 0, buf.length);
fail("failed unwrap state test.");
}
catch (IllegalStateException e)
{
// expected
}
//
// short test
//
try
{
wrapper.init(false, params);
wrapper.unwrap(buf, 0, buf.length / 2);
fail("failed unwrap short test.");
}
catch (InvalidCipherTextException e)
{
// expected
}
}
public static void main(
String[] args)
{
runTest(new RFC3211WrapTest());
}
}
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