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Padding is invalid and cannot be removed

4 Answers 787 Views

Scheduler

This is a migrated thread and some comments may be shown as answers.

Marco du Plessis asked on 14 May 2010, 01:53 PM

Hi ,

My asp.net page contains a radscheduler , whenever I view this page I get the following error.

System.Security.Cryptography.CryptographicException: Padding is invalid and cannot be removed.
at System.Security.Cryptography.RijndaelManagedTransform.DecryptData(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount, Byte[]& outputBuffer, Int32 outputOffset, PaddingMode paddingMode, Boolean fLast)

at System.Security.Cryptography.RijndaelManagedTransform.TransformFinalBlock(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount)

at System.Security.Cryptography.CryptoStream.FlushFinalBlock()
at System.Web.Configuration.MachineKeySection.EncryptOrDecryptData(Boolean fEncrypt, Byte[] buf, Byte[] modifier, Int32 start, Int32 length, IVType ivType, Boolean useValidationSymAlgo)

   at System.Web.UI.Page.DecryptStringWithIV(String s, IVType ivType)
   at System.Web.Handlers.AssemblyResourceLoader.System.Web.IHttpHandler.ProcessRequest(HttpContext context)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

4 Answers, 1 is accepted

answered on 18 May 2010, 01:36 PM

Hi Marco,

This is a common problem with the WebResource.axd ASP.NET handler in web farms. You need to set the machine key to be the same on all servers. More information, as well as further troubleshooting advice can be found in this series of blog posts:

http://blogs.telerik.com/AtanasKorchev/Posts/08-07-18/Web_Resources_demystified_Part_3_Troubleshooting.aspx

I hope this helps.

All the best,
Tsvetomir Tsonev
the Telerik team

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