public void EncryptDecryptFailsIfAlreadyPerformedTest()
{
//------------Setup for test--------------------------
//------------Execute Test---------------------------
var encrypted = DpapiWrapper.Encrypt(message);
var x = encrypted.Where(o => encrypted.Where(u => u == o).Count() > 1).First(); // find first char that appears more than once
var y = encrypted.Where(o => o != x).First(); // find the first char not equal to x
var tamperedEncrypted = encrypted.Replace(x, y);
try
{
var decrypted = DpapiWrapper.Decrypt(tamperedEncrypted);
}
catch (Exception e)
{
e.GetType().Should().Be(typeof(System.Security.Cryptography.CryptographicException));
}
try
{
DpapiWrapper.Decrypt(message);
}
catch (Exception e)
{
e.GetType().Should().Be(typeof(ArgumentException));
}
}
public void EncryptDecryptTest()
{
//------------Setup for test--------------------------
//------------Execute Test---------------------------
var encrypted = DpapiWrapper.Encrypt(message);
encrypted.Should().NotBeNullOrEmpty();
encrypted.Should().NotBeNullOrWhiteSpace();
encrypted.Should().NotBeSameAs(message);
encrypted.Should().NotContain(message);
DpapiWrapper.Decrypt(encrypted).Should().Be(message);
}