private void doWrapTest(
int id,
IBlockCipher engine,
byte[] kek,
byte[] iv,
SecureRandom rand,
byte[] inBytes,
byte[] outBytes)
{
IWrapper wrapper = new Rfc3211WrapEngine(engine);
wrapper.Init(true, new ParametersWithRandom(
new ParametersWithIV(new KeyParameter(kek), iv), rand));
byte[] cText = wrapper.Wrap(inBytes, 0, inBytes.Length);
if (!AreEqual(cText, outBytes))
{
Fail("failed Wrap test " + id + " expected "
+ Hex.ToHexString(outBytes) + " got " + Hex.ToHexString(cText));
}
wrapper.Init(false, new ParametersWithIV(new KeyParameter(kek), iv));
byte[] pText = wrapper.Unwrap(outBytes, 0, outBytes.Length);
if (!AreEqual(pText, inBytes))
{
Fail("rfailed Unwrap test " + id + " expected "
+ Hex.ToHexString(inBytes) + " got " + Hex.ToHexString(pText));
}
}
private void doTestCorruption()
{
byte[] kek = Hex.Decode("D1DAA78615F287E6");
byte[] iv = Hex.Decode("EFE598EF21B33D6D");
IWrapper 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.Message.Equals("wrapped key corrupted"))
{
Fail("wrong exception on length");
}
}
block = Hex.Decode("08639D838C627C897323A2F8C436F541");
doTestChecksum(kek, iv, block, wrapper);
block = Hex.Decode("08736D838C627C897323A2F8C436F541");
doTestChecksum(kek, iv, block, wrapper);
block = Hex.Decode("08739D638C627C897323A2F8C436F541");
doTestChecksum(kek, iv, block, wrapper);
}
public override void PerformTest()
{
doWrapTest(1, new DesEngine(), Hex.Decode("D1DAA78615F287E6"), Hex.Decode("EFE598EF21B33D6D"), r1, Hex.Decode("8C627C897323A2F8"), Hex.Decode("B81B2565EE373CA6DEDCA26A178B0C10"));
doWrapTest(2, new DesEdeEngine(), Hex.Decode("6A8970BF68C92CAEA84A8DF28510858607126380CC47AB2D"), Hex.Decode("BAF1CA7931213C4E"), r2,
Hex.Decode("8C637D887223A2F965B566EB014B0FA5D52300A3F7EA40FFFC577203C71BAF3B"),
Hex.Decode("C03C514ABDB9E2C5AAC038572B5E24553876B377AAFB82ECA5A9D73F8AB143D9EC74E6CAD7DB260C"));
doTestCorruption();
IWrapper wrapper = new Rfc3211WrapEngine(new DesEngine());
ParametersWithIV parameters = new ParametersWithIV(new KeyParameter(new byte[16]), new byte[16]);
byte[] buf = new byte[16];
try
{
wrapper.Init(true, parameters);
wrapper.Unwrap(buf, 0, buf.Length);
Fail("failed Unwrap state test.");
}
catch (InvalidOperationException)
{
// expected
}
catch (InvalidCipherTextException e)
{
Fail("unexpected exception: " + e, e);
}
try
{
wrapper.Init(false, parameters);
wrapper.Wrap(buf, 0, buf.Length);
Fail("failed Unwrap state test.");
}
catch (InvalidOperationException)
{
// expected
}
//
// short test
//
try
{
wrapper.Init(false, parameters);
wrapper.Unwrap(buf, 0, buf.Length / 2);
Fail("failed Unwrap short test.");
}
catch (InvalidCipherTextException)
{
// expected
}
}