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//
// System.Web.UI.LosFormatter
//
// Authors:
// Ben Maurer (bmaurer@users.sourceforge.net)
// Gonzalo Paniagua Javier (gonzalo@ximian.com)
//
// (C) 2003 Ben Maurer
// Copyright (C) 2005-2010 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Configuration;
using System.IO;
using System.Security.Permissions;
using System.Text;
using System.Web.Util;
namespace System.Web.UI {
// CAS - no InheritanceDemand here as the class is sealed
[AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
public sealed class LosFormatter
{
ObjectStateFormatter osf;
public LosFormatter ()
{
osf = new ObjectStateFormatter ();
}
public LosFormatter (bool enableMac, string macKeyModifier) : this (enableMac, String.IsNullOrEmpty (macKeyModifier) ? null : Encoding.ASCII.GetBytes (macKeyModifier))
{
}
public LosFormatter (bool enableMac, byte[] macKeyModifier)
{
osf = new ObjectStateFormatter ();
if (enableMac && (macKeyModifier != null)) {
SetMacKey (macKeyModifier);
}
}
private void SetMacKey (byte[] macKeyModifier)
{
try {
osf.Section.ValidationKey = MachineKeySectionUtils.GetHexString (macKeyModifier);
}
catch (ArgumentException) {
}
catch (ConfigurationErrorsException) {
// bad key (e.g. size), default key will be used
}
}
public object Deserialize (Stream stream)
{
if (stream == null)
throw new ArgumentNullException ("stream");
#if NET_4_0
using (StreamReader sr = new StreamReader (stream)) {
return Deserialize (sr.ReadToEnd ());
}
#else
long streamLength = -1;
if (stream.CanSeek)
streamLength = stream.Length;
MemoryStream ms = null;
if (streamLength != -1 && (stream is MemoryStream) && stream.Position == 0) {
// We save allocating a new stream and reading in this case.
ms = (MemoryStream) stream;
} else {
byte [] bytes = new byte [streamLength >= 0 ? streamLength : 2048];
ms = new MemoryStream ();
int n;
while ((n = stream.Read (bytes, 0, bytes.Length)) > 0)
ms.Write (bytes, 0, n);
streamLength = ms.Length;
}
string b64 = Encoding.ASCII.GetString (ms.GetBuffer (),
0, (int) streamLength);
return Deserialize (b64);
#endif
}
public object Deserialize (TextReader input)
{
if (input == null)
throw new ArgumentNullException ("input");
return Deserialize (input.ReadToEnd ());
}
public object Deserialize (string input)
{
if (input == null)
return null;
return osf.Deserialize (input);
}
internal string SerializeToBase64 (object value)
{
return osf.Serialize (value);
}
public void Serialize (Stream stream, object value)
{
if (stream == null)
throw new ArgumentNullException ("stream");
#if NET_4_0
if (!stream.CanSeek)
throw new NotSupportedException ();
#endif
string b64 = SerializeToBase64 (value);
byte [] bytes = Encoding.ASCII.GetBytes (b64);
stream.Write (bytes, 0, bytes.Length);
}
public void Serialize (TextWriter output, object value)
{
if (output == null)
throw new ArgumentNullException ("output");
output.Write (SerializeToBase64 (value));
}
}
}
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