public static byte[] DecryptDataFromBytes(byte[] cipherText, byte[] Key, byte[] IV)
{
SymmetricCryptoHelper.CanPerformDecrypt(cipherText, Key, IV);
byte[] decryptedData = null;
using (Rijndael rijAlg = Rijndael.Create())
{
rijAlg.Key = Key;
rijAlg.IV = IV;
ICryptoTransform decryptor = rijAlg.CreateDecryptor(rijAlg.Key, rijAlg.IV);
using (MemoryStream msDecrypt = new MemoryStream(cipherText))
{
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (BinaryReader binaryReader = new BinaryReader(csDecrypt))
{
decryptedData = binaryReader.ReadAllBytes();
}
}
}
}
return(decryptedData);
}
public static byte[] EncryptDataToBytes(byte[] Data, byte[] Key, byte[] IV)
{
SymmetricCryptoHelper.CanPerformEncrypt(Data, Key, IV);
byte[] encryptedData;
using (Rijndael rijAlg = Rijndael.Create())
{
rijAlg.Key = Key;
rijAlg.IV = IV;
ICryptoTransform encryptor = rijAlg.CreateEncryptor(rijAlg.Key, rijAlg.IV);
using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (BinaryWriter binaryWriter = new BinaryWriter(csEncrypt))
{
binaryWriter.Write(Data);
}
encryptedData = msEncrypt.ToArray();
}
}
}
return(encryptedData);
}
public static Stream DecryptDataToStream(byte[] Data, byte[] Key, byte[] IV, CryptoAlgorithm crypAlg = CryptoAlgorithm.Rijndael)
{
SymmetricCryptoHelper.CanPerformDecrypt(Data, Key, IV);
byte[] decryptedData = null;
if (crypAlg == CryptoAlgorithm.Rijndael)
{
using (Rijndael rijAlg = Rijndael.Create())
{
rijAlg.Key = Key;
rijAlg.IV = IV;
ICryptoTransform decryptor = rijAlg.CreateDecryptor(rijAlg.Key, rijAlg.IV);
decryptedData = GetDecryptedDataFromCryptoStream(Data, decryptor);
}
return(new MemoryStream(decryptedData));
}
else
{
using (Aes aesAlg = Aes.Create())
{
aesAlg.Key = Key;
aesAlg.IV = IV;
ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
decryptedData = GetDecryptedDataFromCryptoStream(Data, decryptor);
}
return(new MemoryStream(decryptedData));
}
}
public static bool EncryptDataAndSaveToFile(byte[] Data, byte[] Key, byte[] IV, string absolutePath, CryptoAlgorithm crypAlg = CryptoAlgorithm.Rijndael)
{
SymmetricCryptoHelper.CanPerformEncrypt(Data, Key, IV);
if (crypAlg == CryptoAlgorithm.Rijndael)
{
using (Rijndael rijAlg = Rijndael.Create())
{
rijAlg.Key = Key;
rijAlg.IV = IV;
ICryptoTransform encryptor = rijAlg.CreateEncryptor(rijAlg.Key, rijAlg.IV);
WriteEncryptedDataToFile(Data, absolutePath, encryptor);
}
}
else
{
using (Aes aesAlg = Aes.Create())
{
aesAlg.Key = Key;
aesAlg.IV = IV;
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
WriteEncryptedDataToFile(Data, absolutePath, encryptor);
}
}
return(true);
}