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//
// Authors:
// Marek Habersack <grendel@twistedcode.net>
//
// (C) 2011 Novell, Inc (http://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;
using System.Web;
using System.Web.Configuration;
using System.Web.Util;
namespace System.Web.Security
{
public static class MachineKey
{
public static byte[] Decode (string encodedData, MachineKeyProtection protectionOption)
{
if (encodedData == null)
throw new ArgumentNullException ("encodedData");
int dlen = encodedData.Length;
if (dlen == 0 || dlen % 2 == 1)
throw new ArgumentException ("encodedData");
byte[] data = MachineKeySectionUtils.GetBytes (encodedData, dlen);
if (data == null || data.Length == 0)
throw new ArgumentException ("encodedData");
var config = WebConfigurationManager.GetWebApplicationSection ("system.web/machineKey") as MachineKeySection;
byte[] result = null;
Exception ex = null;
try {
switch (protectionOption) {
case MachineKeyProtection.All:
result = MachineKeySectionUtils.VerifyDecrypt (config, data);
break;
case MachineKeyProtection.Encryption:
result = MachineKeySectionUtils.Decrypt (config, data);
break;
case MachineKeyProtection.Validation:
result = MachineKeySectionUtils.Verify (config, data);
break;
default:
return MachineKeySectionUtils.GetBytes (encodedData, dlen);
}
} catch (Exception e) {
ex = e;
}
if (result == null || ex != null)
throw new HttpException ("Unable to verify passed data.", ex);
return result;
}
public static string Encode (byte[] data, MachineKeyProtection protectionOption)
{
if (data == null)
throw new ArgumentNullException ("data");
var config = WebConfigurationManager.GetWebApplicationSection ("system.web/machineKey") as MachineKeySection;
byte[] result;
switch (protectionOption) {
case MachineKeyProtection.All:
result = MachineKeySectionUtils.EncryptSign (config, data);
break;
case MachineKeyProtection.Encryption:
result = MachineKeySectionUtils.Encrypt (config, data);
break;
case MachineKeyProtection.Validation:
result = MachineKeySectionUtils.Sign (config, data);
break;
default:
return String.Empty;
}
return MachineKeySectionUtils.GetHexString (result);
}
}
}
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