public void EnsureBackwardsCompatibilityLongTimeDecryptionOfTwofishGcm()
{
// Ensure that a once stored cipher can always be decrypted even after changes in the liberary
string base64Cipher = "dW5pdHRlc3QkdHdvZmlzaF9nY20kZHhMWFh4K0UrZ2MzWHdWc01rWUFxQT09JHBia2RmMiRma1BCWTdDWXp1OG5YUlJtYk9DUlp3PT0kMTAwMCRRc0ETSqDekQuBgKJ5x4Mvy02OHsivm0uJ9KchKdpGk+pmbF4Kq/EDbx9Uw54uEZUQLnK70dNKSEVtb1GyUOX1mitr";
byte[] cipher = CryptoUtils.Base64StringToBytes(base64Cipher);
ICryptor decryptor = new Cryptor("unittest", null);
string decryptedMessage = CryptoUtils.BytesToString(decryptor.Decrypt(cipher, CryptoUtils.StringToSecureString("brownie")));
Assert.AreEqual("The brown fox jumps over the lazy 🐢🖐🏿 doc.", decryptedMessage);
}
public void EnsureBackwardsCompatibilityLongTimeDecryptionOfAesGcm()
{
// Ensure that a once stored cipher can always be decrypted even after changes in the liberary
string base64Cipher = "dW5pdHRlc3QkYWVzX2djbSQ0NG04QXBFU1ptcXhnYll2OE5wcWl3PT0kcGJrZGYyJGgwSDdxSGZnVFlXNzBKS3lEb0JLeFE9PSQxMDAwJJsMDjdYEYXYmcqTOFRbge6iVfWo/iny4nrIOMVuoqYak6xB/MAe53G5H3AyxiTi8OENJbi9tzZStpe3p3nlDB7l+J8=";
byte[] cipher = CryptoUtils.Base64StringToBytes(base64Cipher);
ICryptor decryptor = new Cryptor("unittest", null);
string decryptedMessage = CryptoUtils.BytesToString(decryptor.Decrypt(cipher, CryptoUtils.StringToSecureString("brownie")));
Assert.AreEqual("The brown fox jumps over the lazy 🐢🖐🏿 doc.", decryptedMessage);
}
public void EnsureBackwardsCompatibilityLongTimeDecryptionOfXChaCha()
{
// Ensure that a once stored cipher can always be decrypted even after changes in the liberary
string base64Cipher = "dW5pdHRlc3Qgdj0yJHhjaGFjaGEyMF9wb2x5MTMwNSRsT0FJVW5wZXEyL0g3Ti96UkdCSktqaW9MdmFTUWk5eCRwYmtkZjIkdmN0dmpXVmx1NEhGbGhqbTV0SGlWQT09JDEwMDAwJCTcCqQglE3Xmfe0lg9AOhzxJXOuj7wEj+kgaSnKlZgnMyQwpQCwa9W57jnz1RhrwUuLh0X3PJpPbf7lR07Le7TFRZc8";
byte[] cipher = CryptoUtils.Base64StringToBytes(base64Cipher);
ICryptor decryptor = new Cryptor("unittest", null);
string decryptedMessage = CryptoUtils.BytesToString(decryptor.Decrypt(cipher, CryptoUtils.StringToSecureString("brownie")));
Assert.AreEqual("The brown fox jumps over the lazy 🐢🖐🏿 doc.", decryptedMessage);
}
/// <summary>
/// Decrypts the note, if the belonging safe is open.
/// </summary>
/// <returns>Decrypted note content, or null if the safe is closed.</returns>
private string UnlockIfSafeOpen(string lockedContent)
{
SafeModel safe = _safes.FindById(Model.SafeId);
if ((safe != null) && safe.IsOpen)
{
byte[] binaryContent = CryptoUtils.Base64StringToBytes(lockedContent);
byte[] unlockedContent = _cryptor.Decrypt(binaryContent, safe.Key);
return(CryptoUtils.BytesToString(unlockedContent));
}
return(null);
}
private void TestSymmetricEncryptionWithShortMessage(ISymmetricEncryptionAlgorithm encryptor)
{
ICryptoRandomService randomGenerator = CommonMocksAndStubs.CryptoRandomService();
byte[] key = randomGenerator.GetRandomBytes(encryptor.ExpectedKeySize);
byte[] nonce = randomGenerator.GetRandomBytes(encryptor.ExpectedNonceSize);
string message = "Dies ist ein kurzer Text";
byte[] binaryMessage = CryptoUtils.StringToBytes(message);
byte[] cipher = encryptor.Encrypt(binaryMessage, key, nonce);
Assert.AreNotEqual(binaryMessage, cipher);
string message2 = CryptoUtils.BytesToString(encryptor.Decrypt(cipher, key, nonce));
Assert.AreEqual(message, message2);
}
public void EnsureCompatibilityToLibsodiumXChaCha20()
{
// Ensure that a once stored cipher can always be decrypted even after changes in the liberary.
// This cypher was created with libsodium.
string base64Cipher = "q8w/Zotsi3ZJp2eaAnFmMiAGgko+N2TkNgunS5+bDRNqrBBoN+XMQPSt7ojO4ODMP3Rf3aoYMNeJFL2/ZqK3AngIuQ==";
byte[] cipher = CryptoUtils.Base64StringToBytes(base64Cipher);
ISymmetricEncryptionAlgorithm decryptor = new BouncyCastleXChaCha20();
ICryptoRandomService randomGenerator = CommonMocksAndStubs.CryptoRandomService(88);
byte[] key = randomGenerator.GetRandomBytes(decryptor.ExpectedKeySize);
byte[] nonce = randomGenerator.GetRandomBytes(decryptor.ExpectedNonceSize);
string decryptedMessage = CryptoUtils.BytesToString(decryptor.Decrypt(cipher, key, nonce));
Assert.AreEqual("The brown fox jumps over the lazy 🐢🖐🏿 doc.", decryptedMessage);
}
