public void TestInvalidCipherCreateCall()
{
var config = new CryptoConfig();
Assert.Throws <ArgumentException>(
() => CryptoFactory.CreateCipher(config));
}
/// <summary>
/// Triggers processing of CryptoConfig object.
/// Passes Config object to processing class constructors.
/// </summary>
/// <param name="plainText">string coming from MainView's TextEditor.</param>
/// <param name="config">CryptoConfig object holding all config and cipher parameters.</param>
/// <returns>updated CryptoConfig object</returns>
public static CryptoConfig ProcessConfigOnSave(string plainText, CryptoConfig config)
{
if (config.IsEncryptActive)
{
if (config.IsPbeActive)
{
var pbeBuilder = CryptoFactory.CreatePbe(config);
config = pbeBuilder.GenerateKeyBytes();
}
var cipherBuilder = CryptoFactory.CreateCipher(config);
config = cipherBuilder.EncryptTextToBytes(plainText);
}
if (!config.IsIntegrityActive)
{
return(config);
}
if (config.Integrity == Integrity.Dsa)
{
var certBuilder = CryptoFactory.CreateCert(config);
certBuilder.GenerateCerts();
config = certBuilder.SignInput(config.Cipher);
}
else
{
var digestBuilder = CryptoFactory.CreateDigest(config);
config = digestBuilder.SignInput(config.Cipher);
}
return(config);
}
public void TestValidPbkdf2Sha256Key()
{
var config = new CryptoConfig
{
IsEncryptActive = true,
IsPbeActive = true,
CipherAlgorithm = CipherAlgorithm.AES,
KeySize = 256,
PbeAlgorithm = PbeAlgorithm.PBKDF2,
PbeDigest = PbeDigest.SHA256,
PbePassword = "******".ToCharArray(),
BlockMode = BlockMode.CBC,
Padding = Padding.Pkcs7,
};
var pbeBuilder = CryptoFactory.CreatePbe(config);
config = pbeBuilder.GenerateKeyBytes();
var cipherBuilder = CryptoFactory.CreateCipher(config);
config = cipherBuilder.EncryptTextToBytes("Hallo Welt");
var decodedCipher = Convert.FromBase64String(config.Cipher);
var result = cipherBuilder.DecryptBytesToText(decodedCipher);
Assert.Equal("Hallo Welt", result);
}
public void TestInvalidCtsInput()
{
var config = new CryptoConfig
{
IsEncryptActive = true,
BlockMode = BlockMode.CTS,
CipherAlgorithm = CipherAlgorithm.AES,
KeySize = 128,
Padding = Padding.Pkcs7
};
var cipherBuilder = CryptoFactory.CreateCipher(config);
Assert.Throws <Org.BouncyCastle.Crypto.DataLengthException>(
() => cipherBuilder.EncryptTextToBytes("Hallo Welt"));
}
/// <summary>
/// Triggers processing of CryptoConfig object.
/// Passes Config object to processing class constructors.
/// Also verifies integrity of cipher if used.
/// </summary>
/// <param name="config">config state after loading all files from disk.</param>
/// <returns>decrypted cipher in string representation.</returns>
public static string ProcessConfigOnLoad(CryptoConfig config)
{
if (config.IsIntegrityActive)
{
if (config.Integrity == Integrity.Dsa)
{
var certBuilder = CryptoFactory.CreateCert(config);
certBuilder.GenerateCerts();
config = certBuilder.SignInput(config.Cipher);
var result = certBuilder.VerifySign(config.Signature, config.Cipher);
Console.WriteLine($"Signature verified: {result}");
}
else
{
var certBuilder = CryptoFactory.CreateDigest(config);
config = certBuilder.SignInput(config.Cipher);
var result = certBuilder.VerifySign(config.Signature, config.Cipher);
Console.WriteLine($"Digest verified: {result}");
}
}
if (config.IsPbeActive)
{
var pbeBuilder = CryptoFactory.CreatePbe(config);
config = pbeBuilder.GenerateKeyBytes();
}
var cipherBuilder = CryptoFactory.CreateCipher(config);
try
{
return(cipherBuilder.DecryptBytesToText(Convert.FromBase64String(config.Cipher)));
}
catch (Org.BouncyCastle.Crypto.InvalidCipherTextException e)
{
Console.WriteLine(e);
return("GCM mac error.");
}
catch (FormatException e)
{
Console.WriteLine(e);
return("Format error.");
}
}
public void TestValidRc4Cipher()
{
var config = new CryptoConfig
{
IsEncryptActive = true,
CipherAlgorithm = CipherAlgorithm.RC4,
KeySize = 2048
};
var cipherBuilder = CryptoFactory.CreateCipher(config);
config = cipherBuilder.EncryptTextToBytes("Hallo Welt");
var decodedCipher = Convert.FromBase64String(config.Cipher);
var result = cipherBuilder.DecryptBytesToText(decodedCipher);
Assert.Equal("Hallo Welt", result);
}
public void TestValidAes192EcbZeroByteCipher()
{
var config = new CryptoConfig
{
IsEncryptActive = true,
CipherAlgorithm = CipherAlgorithm.AES,
KeySize = 192,
BlockMode = BlockMode.ECB,
Padding = Padding.ZeroByte
};
var cipherBuilder = CryptoFactory.CreateCipher(config);
config = cipherBuilder.EncryptTextToBytes("Hallo Welt");
var decodedCipher = Convert.FromBase64String(config.Cipher);
var result = cipherBuilder.DecryptBytesToText(decodedCipher);
Assert.Equal("Hallo Welt", result);
}
