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Padding is invalid and cannot be removed

web-app

Hi,

I'm seeing the message, "Padding is invalid and cannot be removed" being reported a lot in the error log and was wondering if there's anything I should tend to?

Thanks, Chris
acrmartin
· 1 		acrmartin
Monday, June 6, 2011, 3:05:42 PM
Replies (6)
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Which version of Gemini are you running? Can you post the full details?
Saar Cohen
· 5000 		Saar Cohen
Monday, June 6, 2011, 7:33:18 PM
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Hi, Yes, we're running v4.0 and I'm seeing the following error reported for various users. It seems to have started since we switched on Windows Authentication:

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.Security.FormsAuthentication.Decrypt(String encryptedTicket) at CounterSoft.Gemini.Presenter.GeminiHttpModule.Application_AuthenticateRequest(Object source, EventArgs e)
acrmartin
· 1 		acrmartin
Monday, June 6, 2011, 7:42:41 PM
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How often do you get this error? Did anyone report any issues?
Saar Cohen
· 5000 		Saar Cohen
Monday, June 6, 2011, 8:15:57 PM
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I haven't heard any issues yet but I've seen it appear approximately a couple of times a day.
acrmartin
· 1 		acrmartin
Monday, June 6, 2011, 8:19:52 PM
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It might be due to session expiry or app pool recycling. Nothing to worry about.
Mark Wing
· 9108 		Mark Wing
Tuesday, June 7, 2011, 2:50:01 PM
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Thanks.
acrmartin
· 1 		acrmartin
Tuesday, June 7, 2011, 3:07:45 PM