public void ConstructorSecureString()
{
string clearText = GenerateClearText();
SecureString key = ToSS(GeneratePassPhrase());
ICryptoEngine engine = new DESEngine(key);
string encrypted = engine.Encrypt(clearText);
string decrypted = engine.Decrypt(encrypted);
Assert.NotEqual(clearText, encrypted);
Assert.Equal(clearText, decrypted);
}
public void SetInitVectorString()
{
string clearText = GenerateClearText();
string key = GeneratePassPhrase();
string init = GenerateInitVector();
ICryptoEngine engine = new DESEngine(key)
.SetInitVector(init);
string encrypted = engine.Encrypt(clearText);
string decrypted = engine.Decrypt(encrypted);
Assert.NotEqual(clearText, encrypted);
Assert.Equal(clearText, decrypted);
}
private ICryptoEngine GenerateEngine()
{
var engine = new DESEngine(txtKey.Text);
if (cbxUseKeySize.Checked)
{
var keySize = EnumerationConversions.GetEnumName<DESKeySize>(cmbKeySize.SelectedItem.ToString());
engine.SetKeySize(keySize);
}
if (cbxUseInitVector.Checked)
{
engine.SetInitVector(txtInitVector.Text);
}
if (cbxUseKeySalt.Checked)
{
engine.SetSalt(txtSalt.Text);
}
if (cbxUseRandomSalt.Checked)
{
engine.SetRandomSaltLength((int)nudSaltMin.Value, (int)nudSaltMax.Value);
}
if (cbxUsePasswordIterations.Checked)
{
engine.SetIterations((int)nudIterations.Value);
}
if (cbxUseEncoding.Checked)
{
engine.SetEncoding(cmbEncoding.SelectedItem as Encoding);
}
if (cbxUseHashAlgorithm.Checked)
{
engine.SetHashAlgorithm((HashType)cmbHashAlgorithm.SelectedItem);
}
return engine;
}
public void SetRandomSaltLength()
{
string clearText = GenerateClearText();
string key = GeneratePassPhrase();
string init = GenerateInitVector();
var minSalt = (byte)DataGenerator.NextInteger(4, 100);
var maxSalt = (byte)DataGenerator.NextInteger(100, 250);
ICryptoEngine engine = new DESEngine(key)
.SetInitVector(init)
.SetRandomSaltLength(minSalt, maxSalt);
string encrypted = engine.Encrypt(clearText);
string decrypted = engine.Decrypt(encrypted);
Assert.NotEqual(clearText, encrypted);
Assert.Equal(clearText, decrypted);
}
public void InvalidDecryption()
{
string randomData = GenerateClearText();
string fake = Convert.ToBase64String(Encoding.UTF8.GetBytes(randomData));
string key = GeneratePassPhrase();
string init = GenerateInitVector();
ICryptoEngine engine = new DESEngine(key)
.SetInitVector(init);
Assert.Throws<CryptographicException>(delegate
{
engine.Decrypt(fake);
});
}
public void SetEncoding(Encodings encodingType)
{
Encoding encoding = null;
switch (encodingType)
{
//case Encodings.None:
case Encodings.ASCII:
encoding = Encoding.ASCII;
break;
case Encodings.UTF7:
encoding = Encoding.UTF7;
break;
case Encodings.UTF8:
encoding = Encoding.UTF8;
break;
}
string clearText = GenerateClearText();
string key = GeneratePassPhrase();
ICryptoEngine engine = new DESEngine(key)
.SetEncoding(encoding);
string encrypted = engine.Encrypt(clearText);
string decrypted = engine.Decrypt(encrypted);
Assert.NotEqual(clearText, encrypted);
Assert.Equal(clearText, decrypted);
}
public void SetPasswordIterations()
{
string clearText = GenerateClearText();
string key = GeneratePassPhrase();
string init = GenerateInitVector();
var minSalt = (byte)DataGenerator.NextInteger(4, 100);
var maxSalt = (byte)DataGenerator.NextInteger(100, 250);
string saltKey = GenerateRandomSalt();
var iterations = (byte)DataGenerator.NextInteger(1, 10);
ICryptoEngine engine = new DESEngine(key)
.SetInitVector(init)
.SetRandomSaltLength(minSalt, maxSalt)
.SetSalt(saltKey)
.SetKeySize(DESKeySize.Key64Bit)
.SetIterations(iterations);
string encrypted = engine.Encrypt(clearText);
string decrypted = engine.Decrypt(encrypted);
Assert.NotEqual(clearText, encrypted);
Assert.Equal(clearText, decrypted);
}
