/// <summary>
/// Encrypt/Decypt the given cryptData with the given password
/// </summary>
/// <param name="algoType">Algorithm type</param>
/// <param name="cryptData">data to crypt</param>
/// <param name="offset">offset of cryptData for crypt</param>
/// <param name="count">length for crypt</param>
/// <param name="cryptPwd">password string</param>
/// <param name="keySalt">salt string</param>
/// <param name="cryptType">crypt type</param>
/// <returns>encrypted/decrypted data</returns>
/// <remarks>if keySalt is null, then default keySalt is used</remarks>
public static byte[] GetCrypt(CryptAlgo algoType, byte[] cryptData, int offset, int count, string cryptPwd, byte[] keySalt, CryptType cryptType)
{
byte[] retBytes = null;
switch (algoType)
{
case CryptAlgo.Aes:
retBytes = AesCrypt.GetCrypt(cryptData, offset, count, cryptPwd, keySalt, cryptType);
break;
case CryptAlgo.Rijndael:
retBytes = RijndaelCrypt.GetCrypt(cryptData, offset, count, cryptPwd, keySalt, cryptType);
break;
}
return(retBytes);
}
/// <summary>
/// Encrypt/Decypt the given cryptData with the given password
/// </summary>
/// <param name="cryptData">data to crypt</param>
/// <param name="cryptPwd">password string</param>
/// <param name="cryptType">crypt type</param>
/// <returns>encrypted/decrypted data</returns>
public static byte[] GetCrypt(CryptAlgo algoType, byte[] cryptData, string cryptPwd, CryptType cryptType)
{
byte[] retBytes = null;
switch (algoType)
{
case CryptAlgo.Aes:
retBytes = AesCrypt.GetCrypt(cryptData, cryptPwd, null, cryptType);
break;
case CryptAlgo.Rijndael:
retBytes = RijndaelCrypt.GetCrypt(cryptData, cryptPwd, null, cryptType);
break;
}
return(retBytes);
}
/// <summary>
/// Encrypt/Decypt the given cryptData string with the given password
/// </summary>
/// <param name="cryptData">string data to encrypt</param>
/// <param name="cryptPwd">password string</param>
/// <param name="cryptType">crypt type</param>
/// <returns>encrypted/decrypted data</returns>
public static string GetCrypt(CryptAlgo algoType, string cryptData, string cryptPwd, CryptType cryptType)
{
string retString = null;
switch (algoType)
{
case CryptAlgo.Aes:
retString = AesCrypt.GetCrypt(cryptData, cryptPwd, null, cryptType);
break;
case CryptAlgo.Rijndael:
retString = RijndaelCrypt.GetCrypt(cryptData, cryptPwd, null, cryptType);
break;
}
return(retString);
}
/// <summary>
/// Encrypt/Decypt the given cryptData string with the given password
/// </summary>
/// <param name="cryptData">string data to encrypt</param>
/// <param name="cryptPwd">password string</param>
/// <param name="cryptType">crypt type</param>
/// <returns>encrypted/decrypted data</returns>
public static string GetCrypt(CryptAlgo algoType,string cryptData, string cryptPwd, CryptType cryptType)
{
string retString = null;
switch (algoType)
{
case CryptAlgo.Aes:
retString = AesCrypt.GetCrypt(cryptData, cryptPwd, null, cryptType);
break;
case CryptAlgo.Rijndael:
retString = RijndaelCrypt.GetCrypt(cryptData, cryptPwd, null, cryptType);
break;
}
return retString;
}
/// <summary>
/// Encrypt/Decypt the given cryptData with the given password
/// </summary>
/// <param name="algoType">Algorithm type</param>
/// <param name="cryptData">data to crypt</param>
/// <param name="offset">offset of cryptData for crypt</param>
/// <param name="count">length for crypt</param>
/// <param name="cryptPwd">password string</param>
/// <param name="keySalt">salt string</param>
/// <param name="cryptType">crypt type</param>
/// <returns>encrypted/decrypted data</returns>
/// <remarks>if keySalt is null, then default keySalt is used</remarks>
public static byte[] GetCrypt(CryptAlgo algoType, byte[] cryptData,int offset, int count, string cryptPwd, byte[] keySalt, CryptType cryptType)
{
byte[] retBytes = null;
switch (algoType)
{
case CryptAlgo.Aes:
retBytes = AesCrypt.GetCrypt(cryptData,offset,count, cryptPwd, keySalt, cryptType);
break;
case CryptAlgo.Rijndael:
retBytes = RijndaelCrypt.GetCrypt(cryptData,offset,count, cryptPwd, keySalt, cryptType);
break;
}
return retBytes;
}
/// <summary>
/// Encrypt/Decypt the given cryptData with the given password
/// </summary>
/// <param name="cryptData">data to crypt</param>
/// <param name="cryptPwd">password string</param>
/// <param name="cryptType">crypt type</param>
/// <returns>encrypted/decrypted data</returns>
public static byte[] GetCrypt(CryptAlgo algoType, byte[] cryptData, string cryptPwd, CryptType cryptType)
{
byte[] retBytes = null;
switch (algoType)
{
case CryptAlgo.Aes:
retBytes = AesCrypt.GetCrypt(cryptData, cryptPwd, null, cryptType);
break;
case CryptAlgo.Rijndael:
retBytes = RijndaelCrypt.GetCrypt(cryptData, cryptPwd, null, cryptType);
break;
}
return retBytes;
}
public object Crypt(CryptType whichCrypt, CryptAlgo whichAlgo, string input, string password)
{
if (string.IsNullOrEmpty(input))
{
throw new ArgumentNullException("input");
}
if (string.IsNullOrEmpty(password))
{
throw new ArgumentNullException("password");
}
SymmetricAlgorithm cipher;
try
{
switch (whichAlgo)
{
case CryptAlgo.DES:
cipher = new DESCryptoServiceProvider();
break;
case CryptAlgo.TDES:
cipher = new TripleDESCryptoServiceProvider();
break;
case CryptAlgo.AES128:
cipher = new AesManaged();
cipher.KeySize = 128; // 16 bit key
if (IV == null)
{
cipher.GenerateIV();
IV = cipher.IV;
}
else
{
cipher.IV = IV;
}
break;
case CryptAlgo.AES192:
cipher = new AesManaged();
cipher.KeySize = 192;
if (IV == null)
{
cipher.GenerateIV();
IV = cipher.IV;
}
else
{
cipher.IV = IV;
}
break;
case CryptAlgo.AES256:
cipher = new AesManaged();
cipher.KeySize = 256; // 32 bit key
if (IV == null)
{
cipher.GenerateIV();
IV = cipher.IV;
}
else
{
cipher.IV = IV;
}
break;
default:
return(false); // switch shouldn't return
}
//cipher.Key = UTF8Encoding.UTF8.GetBytes(key);
//cipher.Key = Encoding.Unicode.GetBytes(password);
if (Salt == null)
{
Salt = deriveSalt(cipher.KeySize, password);
}
cipher.Key = deriveKeyFromPass(cipher.KeySize, password, Salt);
cipher.Padding = PaddingMode.PKCS7; // change to random data or ISO standard
cipher.Mode = CipherMode.CBC; // More research into proper modes needed
byte[] _input; // encrypt needs a string, decrypt needs a byte[]
byte[] _output; // will contain either ciphertxt or plaintxt
ICryptoTransform transformer = null; // object that does actual crypto computation
if (whichCrypt == CryptType.Encrypt)
{
transformer = cipher.CreateEncryptor(cipher.Key, cipher.IV);
}
else if (whichCrypt == CryptType.Decrypt)
{
transformer = cipher.CreateDecryptor(cipher.Key, cipher.IV);
}
if (input is string)
{
//_input = UTF8Encoding.UTF8.GetBytes(input as string);
if (whichCrypt == CryptType.Encrypt)
{
//_input = UnicodeEncoding.Unicode.GetBytes(input as string);
_input = Encoding.UTF8.GetBytes(input as string);
//_input = Convert.FromBase64String(input as string);
_output = transformer.TransformFinalBlock(_input, 0, _input.Length);
transformer.Dispose();
cipher.Clear(); // kill resource
//return Convert.ToBase64String(_output);
return(Convert.ToBase64String(_output, 0, _output.Length));
}
else if (whichCrypt == CryptType.Decrypt)
{
_input = Convert.FromBase64String(input as string);
_output = transformer.TransformFinalBlock(_input, 0, _input.Length);
//return Convert.ToBase64String(_input, 0, _input.Length);
//return Convert.ToBase64String(_output);
//return Encoding.UTF8.GetString(_output);
transformer.Dispose();
cipher.Clear(); // kill resource
return(Encoding.UTF8.GetString(_output));
}
}
//else if (input is byte[])
//{
// _output = transformer.TransformFinalBlock(input as byte[], 0, (input as byte[]).Length);
// return _output;
//}
return(false); // failed
}
catch (Exception ex)
{
//return ex.Message;
return("Invalid key! " + ex.Message);
}
}
