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System.Security.Cryptography.CryptographicException (BAD DATA)

Posted By:      Posted Date: September 16, 2010    Points: 0   Category :.NET Framework
Can anyone help me out in this issue ? Any help will be appreciated Stack Trace: <?xml version="1.0" encoding="utf-16"?>   <error    host="localhost"    type="System.Security.Cryptography.CryptographicException"     message="Bad Data.&#xD;&#xA;"     source="mscorlib"     detail="System.Web.HttpUnhandledException: Exception of type 'System.Web.HttpUnhandledException' was thrown.  System.Exception: Bad Data.&#xD;&#xA; System.Security.Cryptography.CryptographicException: Bad Data.&#xD;&#xA;&#xD;&#xA;   at System.Security.Cryptography.CryptographicException.ThrowCryptogaphicException(Int32 hr)&#xD;&#xA;   at System.Security.Cryptography.Utils._DecryptData(SafeKeyHandle hKey, Byte[] data, Int32 ib, Int32 cb, Byte[]&amp; outputBuffer, Int32 outputOffset, PaddingMode PaddingMode, Boolean fDone)&#xD;&#xA;   at System.Security.Cryptography.CryptoAPITransform.TransformFinalBlock(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount)&#xD;&#xA;   at System.Security.Cryptography.CryptoStream.FlushFinalBlock()&#xD;&#xA;  CODE:   public static string Decrypt(string stringToDecrypt, string sEncryptionKey)         {    &

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System.Security.Cryptography.CryptographicException: The system cannot find the file specified





When i tried to use a third party web service  using IIS  , i am getting the following Error

Exception Details: System.Security.Cryptography.CryptographicException: The system cannot find the file specified.

[CryptographicException: The system cannot find the file specified.
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Security: Protect Private Data with the Cryptography Namespaces of the .NET Framework


The .NET Framework includes a set of cryptographic services that extend the services provided by Windows through the Crypto API. In this article, the author explores the System.Security.Cryptography namespace and the programming model used to apply cryptographic transformations. He discusses reasons why cryptography is easier in .NET than it was before, including the easy programmatic acccess developers have to the cryptography APIs and the difference between symmetric and asymmetric algorithms. Along the way, a brief discussion of the most widely used algorithms, including RSA, DSA, Rijndael, SHA, and other hash algorithms, is provided.

Dan Fox

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System.Security.SecurityException: Request for the permission of type 'System.Data.SqlClient.SqlCli

I have created a windows library control that accesses a local sql database I tried the following strings for connecting Dim connectionString As String = "Data Source=localhost\SQLEXPRESS;Initial Catalog=TimeSheet;Trusted_Connection = true" Dim connectionString As String = "Data Source=localhost\SQLEXPRESS;Initial Catalog=TimeSheet;Integrated Security=SSPI"   I am not running the webpage in a virtual directory but in C:\Inetpub\wwwroot\usercontrol and I have a simple index.html that tries to read from an sql db but throws the error System.Security.SecurityException: Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.   at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet)   at System.Security.PermissionSet.Demand()   at System.Data.Common.DbConnectionOptions.DemandPermission()   at System.Data.SqlClient.SqlConnection.PermissionDemand()   at System.Data.SqlClient.SqlConnectionFactory.PermissionDemand(DbConnection outerConnection)   at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, etc etc  The action that failed was:DemandThe type of the first permission that failed was:System.Data.SqlClient.SqlClientPermissionThe Zone of the assembly that fa

Encryption (System.Security.Cryptography) .Net 2.0

Hi, Query regarding cryptography.  I'm using .net cryptography to encrypt and decrypt files stored on disk on an asp.net website using .Net 2.0 framework.   The code (copied below) works fine to encrypt and decrypt pdf, tif, jpg, etc.  However when it comes to MS Word documents with embedded images and/or tables I get a "Bad data" error when decrypting.   The same document saved to rtf format is encrypted and decrypted without error.  Also simple formatted text documents in Word format (Office 2003) do not throw an error when being decrypted. Would someone care to point out where I'm going wrong? Thanks, code below   _________________________________    Public Sub Encrypt(ByVal Userid As Integer, ByVal FilePath As String)        'Encrypt the file        Try            Dim EncryptedFilePath As String = FilePath & "enc"            Dim clsNetEnCrypt As New NetEncrypt(User)            clsNetEnCrypt.Encrypt(FilePath, EncryptedFilePath)            'Remove the Unencrypted file  

How to Serialize System.Security.Cryptography objects?



I'm creating a solution for a multi-webserver farm that basically receives and stores files for remote users.  The files arrive at our load balancer in small, HTTPS encrypted chunks that can be anywhere from 1k to >1024k in size, and typically represent a fraction of the overall file being received.

After all the chunks have been received, but before storing the file, we create a sha1 hash of the file just sent in by the user.  If it already matches the hash of something in storage, we merely store a pointer to the originally stored file, instead of storing another copy.

(For reasons outside the scope of this discussion, the client is incapable of computing the hash on its own, and must sent the file to the server).


The Problem:

The "chunk-storage" infrastructure is sufficiently distributed that a given stream of chunks can be processed on any number of web servers.  The same is true of the ASP Session variable, which is stored on a SQL cluster in the farm, so any web server can pick up where a prior server's session left off.

The SHA1 computation, however, currently runs after receiving the last chunk of data, which creates an unnecessary I/O spike and delay in deciding whether or not to commit the file to storage or use a pointer:  The whole file is retrieved from stor



hello i have the following problem

i have upload my content to hosting server but i get the following error

Security Exception

Description: The application attempted to perform an operation not allowed by the security policy.  To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.

Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

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:

[SecurityException: Request for the permission of typ

System.Security.SecurityException: Request for the permission of type 'System.Web.AspNetHostingPerm


Good Day all,

Having an issue with an outside user accessing my IIS7 box. I do not have this problem when running the website from my host machine. I found this post: Http://forums.asp.net/t/1371394.aspx. I assure you that this is not a solution because I am not storing any of my files on a network share. 

What do you think my approach should be. 

I already have read rights to IIS user to my BIN folder. 

Thanks for the help. 

The type 'System.Data.Linq.DataContext' is defined in an assembly that is not referenced. You must



This is frustrating, and I don't know how to solve it.

I have a strange problem. I am adding a LinqDatasource object, and set the context:

        protected void LinqDataSource_ContextCreating(object sender, LinqDataSourceContextEventArgs e)
            e.ObjectInstance = new KaruselaDataContext(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);

Then I get this error:
The type 'System.Data.Linq.DataContext' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Data.Linq, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089'.


On web.config I already have this:
<add assembly="System.Data.Linq, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>

NOTE: The datacontext is in a different project (DLL proect) where I added a refernce to System.Data.Linq.

is there another way adding a refernce to a web project? or only though teh web.config?


Cloud Security: Crypto Services and Data Security in Windows Azure


Many early adopters cloud platforms have questions about security. We review some of the cryptography services and providers in Windows Azure along with some security implications for applications in the cloud.

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Exchange 2000 WSS: Web Storage System Improves Exchange Data Accessibility


The Web Storage System (WSS) in Exchange 2000 is a Web-accessible database that stores any type of data such as e-mail, contacts, appointments, threaded discussions, and multimedia files, and renders the data in HTML in any browser. WSS is based on Internet standards, therefore data can be accessed through URLs, an Exchange OLE DB provider, drive mapping, XML, and Web Documenting and Versioning (WebDAV). This article discusses the WSS schema and how to extend the default schema for custom data. A sample application that uses a custom schema and a custom form to display WSS data is available for download.

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