public void SignVerify_InvalidSignature_ShouldNotVerify()
{
var input = Encoding.UTF8.GetBytes("Hello World");
var rsa = new RSASignatureCipher();
rsa.Init(new RSAPrivateKeyParameter(Key));
var signature = rsa.Sign(input, new SHA1Digest());
signature[signature.Length - 1] ^= 1;
Assert.False(rsa.Verify(input, signature, new SHA1Digest()));
}
public void SignVerify_ShouldRoundTrip()
{
var input = Encoding.UTF8.GetBytes("Hello World");
var rsa = new RSASignatureCipher();
rsa.Init(new RSAPrivateKeyParameter(Key));
var signature = rsa.Sign(input, new SHA1Digest());
Assert.True(rsa.Verify(input, signature, new SHA1Digest()));
Assert.Equal("54eab8c1837f4ded1122e1fbf47d0225188148a092e180e83b489aba1f1dc7b5" +
"241103ba8f136b393cf8c054a6a69e0c372453aa098e091a2dbe0310f0b653cb", HexConverter.ToHex(signature));
}