public void TestChangeMessages()
{
byte[] seed = { 0, 0, 0, 0 };
RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider(seed);
string message1 = "hello";
KeyPair keypair1 = new KeyPair(rng);
Biscuit.Crypto.Token token1 = new Biscuit.Crypto.Token(rng, keypair1, Encoding.UTF8.GetBytes(message1));
var either = token1.Verify();
Assert.AreEqual(new Right(null), either);
string message2 = "world";
KeyPair keypair2 = new KeyPair(rng);
Biscuit.Crypto.Token token2 = token1.Append(rng, keypair2, Encoding.UTF8.GetBytes(message2));
token2.Blocks[1] = Encoding.UTF8.GetBytes("you");
Assert.AreEqual(new Left(new Errors.InvalidSignature()), token2.Verify());
string message3 = "!!";
KeyPair keypair3 = new KeyPair(rng);
Biscuit.Crypto.Token token3 = token2.Append(rng, keypair3, Encoding.UTF8.GetBytes(message3));
Assert.AreEqual(new Left(new Errors.InvalidSignature()), token3.Verify());
}
public void TestThreeMessages()
{
byte[] seed = { 0, 0, 0, 0 };
RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider(seed);
string message1 = "hello";
KeyPair keypair1 = new KeyPair(rng);
Biscuit.Crypto.Token token1 = new Biscuit.Crypto.Token(rng, keypair1, Encoding.UTF8.GetBytes(message1));
Assert.AreEqual(new Right(null), token1.Verify());
string message2 = "world";
KeyPair keypair2 = new KeyPair(rng);
Biscuit.Crypto.Token token2 = token1.Append(rng, keypair2, Encoding.UTF8.GetBytes(message2));
Assert.AreEqual(new Right(null), token2.Verify());
string message3 = "!!";
KeyPair keypair3 = new KeyPair(rng);
Biscuit.Crypto.Token token3 = token2.Append(rng, keypair3, Encoding.UTF8.GetBytes(message3));
Assert.AreEqual(new Right(null), token3.Verify());
}