internal static EncryptionResult Encrypt(SecureString input, SecureString key)
{
EncryptionResult result = null;
byte[] data = GetData(key);
result = Encrypt(input, data);
Array.Clear(data, 0, data.Length);
return(result);
}
internal static EncryptionResult Encrypt(SecureString input, byte[] key, byte[] iv)
{
Utils.CheckSecureStringArg(input, "input");
Utils.CheckKeyArg(key, "key");
byte[] encryptedData = null;
MemoryStream ms = null;
ICryptoTransform encryptor = null;
CryptoStream cs = null;
//
// prepare the crypto stuff. Initialization Vector is
// randomized by default.
//
Aes aes = Aes.Create();
if (iv == null)
{
iv = aes.IV;
}
encryptor = aes.CreateEncryptor(key, iv);
ms = new MemoryStream();
using (cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write))
{
//
// get clear text data from the input SecureString
//
byte[] data = GetData(input);
//
// encrypt it
//
cs.Write(data, 0, data.Length);
cs.FlushFinalBlock();
//
// clear the clear text data array
//
Array.Clear(data, 0, data.Length);
//
// convert the encrypted blob to a string
//
encryptedData = ms.ToArray();
EncryptionResult output = new EncryptionResult(ByteArrayToString(encryptedData), Convert.ToBase64String(iv));
return(output);
}
}
/// <summary>
/// Return contents of the SecureString after encrypting
/// using the specified key and encoding the encrypted blob as a string.
/// </summary>
/// <param name="input">Input string to encrypt.</param>
/// <param name="key">Encryption key.</param>
/// <returns>A string (see summary).</returns>
internal static EncryptionResult Encrypt(SecureString input, SecureString key)
{
EncryptionResult output = null;
//
// get clear text key from the SecureString key
//
byte[] keyBlob = GetData(key);
//
// encrypt the data
//
output = Encrypt(input, keyBlob);
//
// clear the clear text key
//
Array.Clear(keyBlob, 0, keyBlob.Length);
return(output);
}
internal static EncryptionResult Encrypt(SecureString input, byte[] key, byte[] iv)
{
Utils.CheckSecureStringArg(input, "input");
Utils.CheckKeyArg(key, "key");
byte[] encryptedData = null;
MemoryStream ms = null;
ICryptoTransform encryptor = null;
CryptoStream cs = null;
//
// prepare the crypto stuff. Initialization Vector is
// randomized by default.
//
Aes aes = Aes.Create();
if (iv == null)
iv = aes.IV;
encryptor = aes.CreateEncryptor(key, iv);
ms = new MemoryStream();
using (cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write))
{
//
// get clear text data from the input SecureString
//
byte[] data = GetData(input);
//
// encrypt it
//
cs.Write(data, 0, data.Length);
cs.FlushFinalBlock();
//
// clear the clear text data array
//
Array.Clear(data, 0, data.Length);
//
// convert the encrypted blob to a string
//
encryptedData = ms.ToArray();
EncryptionResult output = new EncryptionResult(ByteArrayToString(encryptedData), Convert.ToBase64String(iv));
return output;
}
}
