private void TestExceptions()
{
ChaCha20Poly1305 c = new ChaCha20Poly1305();
try
{
c = new ChaCha20Poly1305(new SipHash());
Fail("incorrect mac size not picked up");
}
catch (ArgumentException e)
{
// expected
}
try
{
c.Init(false, new KeyParameter(new byte[32]));
Fail("illegal argument not picked up");
}
catch (ArgumentException e)
{
// expected
}
AeadTestUtilities.TestTampering(this, c, new AeadParameters(new KeyParameter(new byte[32]), 128, new byte[12]));
byte[] P = Strings.ToByteArray("Hello world!");
byte[] buf = new byte[100];
c = new ChaCha20Poly1305();
AeadParameters aeadParameters = new AeadParameters(new KeyParameter(new byte[32]), 128, new byte[12]);
c.Init(true, aeadParameters);
c.ProcessBytes(P, 0, P.Length, buf, 0);
c.DoFinal(buf, 0);
try
{
c.DoFinal(buf, 0);
Fail("no exception on reuse");
}
catch (InvalidOperationException e)
{
IsTrue("wrong message", e.Message.Equals("ChaCha20Poly1305 cannot be reused for encryption"));
}
try
{
c.Init(true, aeadParameters);
Fail("no exception on reuse");
}
catch (ArgumentException e)
{
IsTrue("wrong message", e.Message.Equals("cannot reuse nonce for ChaCha20Poly1305 encryption"));
}
}
private void DoTestExceptions()
{
GcmBlockCipher gcm = new GcmBlockCipher(CreateAesEngine());
try
{
gcm = new GcmBlockCipher(new DesEngine());
Fail("incorrect block size not picked up");
}
catch (ArgumentException)
{
// expected
}
try
{
gcm.Init(false, new KeyParameter(new byte[16]));
Fail("illegal argument not picked up");
}
catch (ArgumentException)
{
// expected
}
AeadTestUtilities.TestTampering(this, gcm, new AeadParameters(new KeyParameter(new byte[16]), 128, new byte[16]));
byte[] P = Strings.ToByteArray("Hello world!");
byte[] buf = new byte[100];
GcmBlockCipher c = new GcmBlockCipher(CreateAesEngine());
AeadParameters aeadParameters = new AeadParameters(new KeyParameter(new byte[16]), 128, new byte[16]);
c.Init(true, aeadParameters);
c.ProcessBytes(P, 0, P.Length, buf, 0);
c.DoFinal(buf, 0);
try
{
c.DoFinal(buf, 0);
Fail("no exception on reuse");
}
catch (InvalidOperationException e)
{
IsTrue("wrong message", e.Message.Equals("GCM cipher cannot be reused for encryption"));
}
try
{
c.Init(true, aeadParameters);
Fail("no exception on reuse");
}
catch (ArgumentException e)
{
IsTrue("wrong message", e.Message.Equals("cannot reuse nonce for GCM encryption"));
}
}