C# - Exception Is Like The Padding Is Invalid And Cannot Be Removed Exception?

Jul 12, 2010

We're getting this InternalSubStringWithChecks exception with our application's healthMonitoring. This exception is like the Padding is invalid and cannot be removed exception where it's being recorded and we're getting a notification email but the end user is unaware that an actual error has happened. Though we don't want our event log filled up with this rubbish! The stack trace is:

Parameter name: length
at System.String.InternalSubStringWithChecks(Int32 startIndex, Int32 length, Boolean fAlwaysCopy)
at System.Web.Handlers.AssemblyResourceLoader.System.Web.IHttpHandler.ProcessRequest
[code]...

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C# - What Else Can Cause 'Padding Is Invalid And Cannot Be Removed" Exception With WebResource.axd

May 7, 2010

Recently, a couple of my applications have started throwing exceptions with the message Padding is invalid and cannot be removed intermitently

My applications already have a machineKey specified in the web.config as suggested in this thread

The applications are deployed to a single Windows 2003 server running IIS6.

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Security :: Getting Error/Padding Is Invalid And Cannot Be Removed.

Jan 15, 2010

I have all application errors sent to my email. I keep getting this:

mysite.com/webresource.axd?d=yacsx7hz0irzn_i7ifr3morrek9u6srdkqxsjvpn3mw1&t=633598204507656250
Padding is invalid and cannot be removed.

[Exception Info]

Stack Trace: 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()
[code]....

i googled and read to add machineKey in my web.config <system.web> which i did:
<machineKey validationKey='0EFA95136AEA44850D5CEDDF0CC7502B1A009.....' decryptionKey='E88EB13ADB2C3D395193AA71DBB1E...' validation='SHA1'/>

and added
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Security :: Padding Is Invalid And Cannot Be Removed/unable To Solve It?

Feb 23, 2010

Following is the error log captured:-

The error description is as follows :
Source: mscorlib

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

[code]....
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Apr 15, 2010

I am using following code to encrypt and decrypt files. It works fine in windows application but shows an error in asp.net class. It's using Riijandael method.


Error : padding is invalid and cannot be removed

Code:Public Sub EncryptOrDecryptFile(ByVal strInputFile As String, _
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Oct 4, 2010

We (out IT partner really) recently changed some DNS for a web farmed site we have so that the two production server have round-robin DNS switching between the two. Prior to this switch we didn't really have problems with WebResource.axd files. Since the switch, when we hit the live public URL, we get an error:

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padding is invalid and cannot be removed

below is my web.config:

[code]....

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I'm getting the following error in our QA environment but only through the IIS7 reverse proxy. If I hit the application server directly it works fine. In our DEV environment it works fine through the proxy or directly.

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Server Error in '/' Application.

Padding is invalid and cannot be removed.

Description: An unhandled exception occurred during the execution of the current web request.

Exception Details: System.Security.Cryptography.CryptographicException: Padding is invalid and cannot be removed.

Source Error:An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:[CryptographicException: Padding is invalid and cannot be removed.]
System.Security.Cryptography.RijndaelManagedTransform.DecryptData(Byte[] inputBuffer, Int32 inputOffset,
[code]....
Version Information: Microsoft .NET Framework Version:2.0.50727.4952; ASP.NET Version:2.0.50727.4927

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Server Error in '/' Application.

Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

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[ArgumentException: Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.]

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