public static string DecryptString(string cryptedValue, KeyVector keyVector)
{
var retVal = string.Empty;
if (cryptedValue.HasValue())
{
MemoryStream ms = null;
CryptoStream cs = null;
try
{
byte[] buffer = Convert.FromBase64String(cryptedValue);
var rv = new RijndaelManaged();
ms = new MemoryStream(buffer);
cs = new CryptoStream(
ms,
rv.CreateDecryptor(keyVector.Key, keyVector.Vector),
CryptoStreamMode.Read
);
var sr = new StreamReader(cs);
retVal = sr.ReadToEnd();
}
catch (Exception ex)
{
string message = string.Format("Base.Cryptography.EncryptDecryptHelper: DecryptString(): {0}", ex.GetFriendlyMessage());
throw new Exception(message);
}
finally
{
if (ms != null)
{
ms.Close();
}
if (cs != null)
{
cs.Close();
}
}
}
return retVal;
}
public static string EncryptString(string plainValue, KeyVector keyVector)
{
var retVal = string.Empty;
if (plainValue.HasValue())
{
var ms = new MemoryStream();
CryptoStream cs = null;
try
{
var rv = new RijndaelManaged();
cs = new CryptoStream(
ms,
rv.CreateEncryptor(keyVector.Key, keyVector.Vector),
CryptoStreamMode.Write
);
var sw = new StreamWriter(cs);
sw.Write(plainValue);
sw.Flush();
cs.FlushFinalBlock();
ms.Flush();
// convert back to a string
retVal = Convert.ToBase64String(ms.GetBuffer(), 0, Convert.ToInt32(ms.Length));
sw.Close();
}
catch (Exception ex)
{
string message = string.Format("Base.Cryptography.EncryptDecryptHelper: EncryptString(): {0}", ex.GetFriendlyMessage());
throw new Exception(message);
}
finally
{
if (ms != null)
{
ms.Close();
}
if (cs != null)
{
cs.Close();
}
}
}
return retVal;
}