static string encrypt(string input)
{
string key = Setting.userPassword;
AESservice aes = new AESservice(xSalt, xAesIv);
CryptObject cryptObject = aes.encrypt(input, key);
string output = cryptObject.value;
return(output);
}
public CryptObject decrypt(string cipherText, string password)
{
string plainText = null;
CryptObject cryptObject = null;
try
{
byte[] vectorBytes = Encoding.ASCII.GetBytes(initializationVector);
byte[] saltBytes = Encoding.ASCII.GetBytes(salt);
byte[] valueBytes = Convert.FromBase64String(cipherText);
byte[] decrypted;
int decryptedByteCount = 0;
using (AesManaged cipher = new AesManaged())
{
cipher.KeySize = keySize;
Rfc2898DeriveBytes passBytes = new Rfc2898DeriveBytes(password, saltBytes, iterations);
byte[] keyBytes = passBytes.GetBytes(keySize / 8);
cipher.Mode = CipherMode.CBC;
using (ICryptoTransform decryptor = cipher.CreateDecryptor(keyBytes, vectorBytes))
{
using (MemoryStream memoryStream = new MemoryStream(valueBytes))
{
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read))
{
decrypted = new byte[valueBytes.Length];
decryptedByteCount = cryptoStream.Read(decrypted, 0, decrypted.Length);
}
}
}
cipher.Clear();
plainText = Encoding.UTF8.GetString(decrypted, 0, decryptedByteCount);
cryptObject = new CryptObject(true, plainText);
}
}
catch (Exception ex)
{
cryptObject = new CryptObject(false, "Nieprawidłowe parametry deszyfrowania!");
LogService.add(ex.ToString());
}
return(cryptObject);
}
public CryptObject encrypt(string plainText, string password)
{
string ciphertext = null;
CryptObject cryptObject = null;
try
{
byte[] vectorBytes = Encoding.ASCII.GetBytes(initializationVector);
byte[] saltBytes = Encoding.ASCII.GetBytes(salt);
byte[] valueBytes = Encoding.UTF8.GetBytes(plainText);
byte[] ciphertextBytes;
using (AesManaged cipher = new AesManaged())
{
cipher.Mode = CipherMode.CBC;
cipher.KeySize = keySize;
// using PBKDF2 algorithm
Rfc2898DeriveBytes passBytes = new Rfc2898DeriveBytes(password, saltBytes, iterations);
byte[] keyBytes = passBytes.GetBytes(keySize / 8);
using (ICryptoTransform encryptor = cipher.CreateEncryptor(keyBytes, vectorBytes))
{
using (MemoryStream memoryStream = new MemoryStream())
{
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
{
cryptoStream.Write(valueBytes, 0, valueBytes.Length);
cryptoStream.FlushFinalBlock();
ciphertextBytes = memoryStream.ToArray();
}
}
}
cipher.Clear();
}
ciphertext = Convert.ToBase64String(ciphertextBytes);
cryptObject = new CryptObject(true, ciphertext);
}
catch (Exception ex)
{
cryptObject = new CryptObject(false, "Nieprawidłowe parametry szyfrowania!" + Environment.NewLine + "iv=" + initializationVector + "salt=" + salt);
LogService.add(ex.ToString());
}
return(cryptObject);
}
static string decrypt(string input)
{
string output = null;
string key = Setting.userPassword;
AESservice aes = new AESservice(xSalt, xAesIv);
CryptObject cryptObject = aes.decrypt(input, key);
if (cryptObject.operationSuccess)
{
output = cryptObject.value;
}
else
{
output = null;
}
return(output);
}
void decrypt()
{
string ciphertext = getInput(textBox1);
string password = getInput(textBox2);
AESservice aesService = getAESsettings();
CryptObject cryptObject = aesService.decrypt(ciphertext, password);
string output = cryptObject.value;
if (cryptObject.operationSuccess)
{
printOutput(output);
}
else
{
MessageBox.Show(output, "Błąd", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
