System.Security.Permissions.FileIOPermission When Using MEF To Load Dll's
Jul 16, 2010
I am trying to load some dll's into a MEF DirectoryCatalog within an ASP.NET MVC application:
var catalog = new DirectoryCatalog(HttpRuntime.BinDirectory, "Toptable.Mobile.*.dll");
When I run the app through the Cassini web server (i.e. F5) everything runs fine however when hosted in IIS(7) I get the following exception:
[code]....
The .NET trust levels for the application are set to "Full" both for the site and globally and I have set the trust level in web.config (system.web/trust) to Full.
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Jun 3, 2010
I am using Itext sharp to create a pdf. I am adding an image and I keep getting this error
Request for the permission of type 'System.Security.Permissions.FileIOPermission, mscorlib, ersion=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
it is this bit of code that is causing this
[Code]....
If i comment this out, the PDF builds and no errors are thrown (there is just no image)
I don't understand cause I am am trying to do is read a file.
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Feb 22, 2011
Here is my code
[Code]....
"fileUpload" is the FileUpload ASP.NET control. The SaveAs method writes the user uploaded file to a specified location on the server. IT WORKS. That tells me that the ASP.NET process has the proper write permission to write to the file.The next line uses an assembly called PdfSharp which you can use to open PDF files and manipulate them. In this case, the line simply opens up the user uploaded file. That is where the error occurs. WTH?
It works on my production machine. It does not work on my local machine. It USED TO. It was never a problem before.So why would it be fine to WRITE to the server, but trying to open a file give an error? Makes no sense. Googling yields a suggestion to put <trust level="Full" originUrl="" /> under <system.web> in web.config. It does not work.
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Nov 22, 2010
It's a ?/$%/$%"!$ mess ... My webpage contains a winform user control. That user control send text to LPT1.It acts like an ActiveX. I set my website (on localmachine) as a trust one in IE and set all properties for ActiveX under security tab. The user control is showed under IE but I got a System.Security.Permissions.SecurityPermission when execute it.When I sign my control, IE can't display it ! I registered the dll in the .Net Framework Configuration tool
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Apr 6, 2010
when i run my application i got this error like...
Description: An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Security.Policy.PolicyException: Required permissions cannot be acquired.
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Oct 13, 2010
There appears to be a recent issue with how CreateDirectory resolves FileIOPermission that is causing issues on our server.
Reading through some similar posts on the issue there is a lot of misinformation being given out, so I am hoping to get some kind of clarification.
Given the following setup:
1. Windows Server 2003 SP2 running IIS6 with latest version of .NET Framework 3.5 SP1 fully patched
2. A web site created under IIS6 running under Medium Trust and with the Network Service user being given Full Control over the virtual directory.
3. Running System.IO.Directory.CreateDirectory with the following code:
System.IO.Directory.CreateDirectory(Server.MapPath("~/testfolder"))
4. Fails with:
[Code]....
It appears CreateDirectory is breaking the permissions somehow, as the medium trust rules are as follows:
<IPermission version="1" Read="$AppDir$" Write="$AppDir$" Append="$AppDir$" PathDiscovery="$AppDir$"/>
These rules all point to being able to create directories within the virtual directory/application folder. In fact I am certain this has worked in the past, but recently has stopped working.
Note that this is not an NTFS permissions issue, files can be written,read and deleted in the virtual directory, only CreateDirectory is restricted somehow.
So what is going on, has a recent security update changed this functionality so that Medium Trust no longer has the ability to create directories?
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Oct 14, 2010
There seems to be an issue with the "Trust" level when executing within a "Cloud" environment. In order for the following app to work it needs a trust level of at least "Medium." This web app is developed using VB.NET 3.5, and Visual Studio 2008. The app works perfectly on my local sever but when deployed/published to the "Cloud" it returns the error: System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. I have added all 4 required values, ConsumerKey, ConsumerSecret, OAuthToken, and OAuthTokenSecret to the web.config file in the "appSettings" section of the "configuration"
[Code]....
If found that by going to [URL] and signing into the account that is using the application, then go to the "Settings" page, go to the bottom of the page and click on the "API" menu option. Once the API page appears you will clik on the button "2", Register An App. On the right side on the new page, you will see a button "View Your Applications." If you have previously registered your app, click this button, If not fill out the appliction for a new app. Now at the View your Applications page, select the app you want to get the authorization keys for where is says "Edit Details". Now click on the button to the right that says, "Application Detail." Here you will find your Consumer Key and your Consumer Secret Key. On the right side of this page you will see the menu option "My Access Token", click it and you will find your oauth_token and your oauth_token_secret keys! Not that you have all the keys, put them in the "appSettings" section of the web.config file. Add "Dim twConn As New TwitterVB2.TwitterAPI" at the top of the page.
I then created a subroutine where I pass in the Tweet:
[Code]....
This code works great in an enviornment that allows at least a "Medium" trust level. However it appears that many of the "new" hosting envrionments such as "Cloud Hosting" and others do not allow this trust level automatically!However if the trust level is less than "Medium" on your host you will likely receive the error message: "Twitter Returned: Request for the permission of type 'System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed." If anyone has found a fix for this "Trust Level"
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Oct 21, 2010
I am running Windows Server 2008, ASP.NET 3.5, IIS7 i wonder if it's IIS7 problem, or .NET Framework or even security updates problem suddenly all websites do not work, and from event viewer there're two errors
Exception: System.TypeLoadException
Message: Could not load type 'System.Security.Authentication.ExtendedProtection.ChannelBinding' from assembly 'System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
StackTrace: at System.Web.Hosting.IIS7WorkerRequest.Dispose()
at System.Web.Hosting.PipelineRuntime.DisposeHandlerPrivate(HttpContext context)
at System.Web.HttpRuntime.FinishRequestNotification(IIS7WorkerRequest wr, HttpContext context, RequestNotificationStatus& status)
at System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context)
at System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr managedHttpContext, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags)
at System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr managedHttpContext, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags)
Faulting application w3wp.exe, version 7.0.6002.18005, time stamp 0x49e023cf, faulting module kernel32.dll, version 6.0.6002.18005, time stamp 0x49e037dd
it's on SP2 already
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Feb 11, 2010
I am doing some testing and want to find out best practice for creating a new user to assign to an appPool. I know that the default ASPNET account, on IIS 6.0, is very low permissions. For experienced folks, what are the bare permissions required to grant this new user? Yes, I am aware that various NTFS rights are required for different operations, such as reading outside of the application path, writing to the NTFS share, etc. I am just looking at a base install.
Dino Esposito wrote in Chapter 15 of Programming Microsoft ASP.NET 2.0 - Core Reference that the following directories would need the respective permissions:
.NET framework root - read/list Temporary ASP.NET folders - full GAC - read Windows System32 - access/read App root - access/read Web site root - scanWhat else would I need to set up beyond this base configuration as far as rights are concerned? If anyone does this regularly, do you have a script to do this automatically?
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Oct 11, 2010
i have installed ajax control kit successfully and all controls already came in toolbar tab named "Ajax Control toolkit"But when i try to design any page using with ajax control toolkit, follow error is coming:
Could not load type 'System.Web.UI.ScriptReferenceBase' from assembly 'System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.TypeLoadException: Could not load type 'System.Web.UI.ScriptReferenceBase' from assembly 'System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.
Source Error:[Code]....
Stack Trace: [Code]....
[TypeLoadException: Could not load type 'System.Web.UI.ScriptReferenceBase' from assembly 'System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.]
AjaxControlToolkit.ToolkitScriptManager.OnResolveScriptReference(ScriptReferenceEventArgs e) in [code]...
I am using VIsual Studio 2008 , framework 3.5 but i don't know why in error information version is showing 2.0
i install tool kit according 3.5 framework.also note, framework built-in ajax tags i can use fine and they work properly.
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Dec 15, 2010
i have installed ajaxtoolkit 3.5 but when i debug i am getting this error Could not load type 'System.Web.UI.ScriptReferenceBase' from assembly 'System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' even i have changed my tags to
<asp:ToolkitScriptManager
ID="ToolkitScriptManager1"
EnablePartialRendering="true"
runat="server"></asp:ToolkitScriptManager>
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Sep 13, 2010
I've got a routine that tries to import files from an import directory, spitting them out to an Error directory if the import fails. The Error directory is shared and users have access permissions to delete files in there, so they can try to fix the problems and then move the files off to the import directory again. I use File.Move to move the files to the Error directory and this is working fine, apart from the permissions - it seems to revert to a default set of permissions, rather than the directory's one, and so the users can't remove the files - how can I reset the permissions on the file to those of their containing directory? I've tried poking around with SetAccessControl and SetAccessRuleProtection but I don't seem to be having any luck?
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Mar 4, 2010
I am having trouble running a commercial ASP.NET application on a client machine. On most client machines this runs as intended, but for one machine I am getting a security exception as follows: Server Error in '/ElasSelfService' Application. Required permissions cannot be acquired. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Security.Policy.PolicyException: Required permissions cannot be acquired. 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:
[PolicyException: Required permissions cannot be acquired.]
System.Security.SecurityManager.ResolvePolicy(Evidence evidence, PermissionSet reqdPset, PermissionSet optPset, PermissionSet denyPset, PermissionSet& denied, Boolean checkExecutionPermission) +7602199
System.Security.SecurityManager.ResolvePolicy(Evidence evidence, PermissionSet reqdPset, PermissionSet optPset, PermissionSet denyPset, PermissionSet& denied, Int32& securitySpecialFlags, Boolean checkExecutionPermission) +57
[FileLoadException: Could not load file or assembly 'Infragistics2.WebUI.UltraWebListbar.v8.3, Version=8.3.20083.1009, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb' or one of its dependencies. Failed to grant minimum permission requests. (Exception from
HRESULT: 0x80131417)]
System.Reflection.Assembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) +0
System.Reflection.Assembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) +43
System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +127
System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +142
System.Reflection.Assembly.Load(String assemblyString) +28
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +46
[ConfigurationErrorsException: Could not load file or assembly 'Infragistics2.WebUI.UltraWebListbar.v8.3, Version=8.3.20083.1009, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb' or one of its dependencies. Failed to grant minimum permission requests. (Exception
from HRESULT: 0x80131417)]
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +613
System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory() +203
System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo ai) +105
System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection compConfig) +178
System.Web.Compilation.BuildProvidersCompiler..ctor(VirtualPath configPath, Boolean supportLocalization, String outputAssemblyName) +54
System.Web.Compilation.BuildManager.CompileWebFile(VirtualPath virtualPath) +229
System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile) +261
System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile) +101
System.Web.Compilation.BuildManager.GetVirtualPathObjectFactory(VirtualPath virtualPath, HttpContext context, Boolean allowCrossApp, Boolean noAssert) +126
System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(VirtualPath virtualPath, Type requiredBaseType, HttpContext context, Boolean allowCrossApp, Boolean noAssert) +62
System.Web.UI.PageHandlerFactory.GetHandlerHelper(HttpContext context, String requestType, VirtualPath virtualPath, String physicalPath) +33
System.Web.UI.PageHandlerFactory.System.Web.IHttpHandlerFactory2.GetHandler(HttpContext context, String requestType, VirtualPath virtualPath, String physicalPath) +40
System.Web.HttpApplication.MapHttpHandler(HttpContext context, String requestType, VirtualPath path, String pathTranslated, Boolean useAppConfig) +160
System.Web.MapHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +93
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155
The website has a separate application pool defined for it running under the Network Service account. I have checked the settings for the virtual directory for the application but nothing seems wrong. I have tried defining the trust level in web.config to full trust but this does not fix the issue. I have looked into defining the trust level for the application through the machine.config file but I am unsure of how to proceed with this.
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Dec 27, 2010
We use a build tool, TeamCity to do our builds. I have a directory locally with javascript files that works fine, but when its built and pushed to our test server and I try to get to any files in the directory I get: 401 - Unauthorized: Access is denied due to invalid credentials.
I've changed permissions several time on the server (2008/IIS 7) and still the problem persists. I have other directories that have javascripts and when I put the path into the browser for them I get the source.
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Oct 5, 2010
I'm developing a managed module for IIS7. Assembly with my code is placed in GAC and worked fine within 2.0 pipeline. But with .NET 4.0 pipeline (and Medium Trust Level chosen) there are no permissions to read registry and code is unable to read/write
"C:Program Files<Folder>MyAppConfig.file"
Is there any way to grant my assembly with proper permissions to do this?
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May 3, 2010
how can we set grant or dynie access or permissions to folder by programming c# in asp.net?
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Mar 31, 2010
I have a file on the disk and I want to give Full Control Permission to all the users of that computer.
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Jan 16, 2011
I want to remove execution permission for one folder in the site.
For example:-
I uploaded files to one folder called "Downloads" .
so, user can download those file just browsing "http://localhost/downloads/uploadfile.wmv". But problem is once user uploaded ASPX page (default.aspx). then user can browse like this http://localhost/downloads/default.aspx". In that, if he wrote so code for removing files..!. So, I don't want to run the script in this folder, I just want to show that file as text output.
Note:- This I can handle by using my own code to display files(ASPX, ashx and ....). But, I want to allow the user to access directly to that file.
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Feb 8, 2011
I am developing a web application using asp.net 4.0, vb.net 4.0 and Sql-Server 2005 as backend. I want to implement read only or read/write permissions for a particular logged in user. Ex : I have a Purchase order page, now I want to assign only view permissions to a particular user and read/write permissions to another user. what would be the best way to do it ? Use authentication and authorization provided by .Net or implement custom authentication and authorization ?
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Nov 12, 2010
I have a web site that is using windows authentication. 'Enable anonymous access' is unchecked. It works when I call it through Visual Studio but when I put the site on the server I get the following error:
Unable to cast object of type 'System.Security.Principal.GenericPrincipal' to type 'System.Web.Security.RolePrincipal'.
Here is the offending line:
System.Security.Principal.GenericPrincipal genericPrincipal = (System.Security.Principal.GenericPrincipal)HttpContext.Current.User;
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Jun 18, 2010
I wrote an asp.net application that I'm trying to run on a godaddy domain I bought. I need to read a file in a folder that I did not give read access to so that your average user cannot see in the informaion in that folder. I assumed that the asp.net program would have the same credentials as myself because server-side code. Turns out I am wrong. When I go to use the asp.net application it throws an access denied error saying that the ASP.NET user account has to be given permissions to access the folder.
After talking to two different tech support people at godaddy I've come to the realization that they are either dumb or lazy (or a combo of the two).I came across some code that you can put into the web.config file that would allow the asp.net application to impersonate a user, which would work great to use myself as the impersonated user. However it seems that godaddy cannot give me the name of the server that my domain is on (that's understandable) so I don't know what to put in the identity tag to get this to work.
Here is the code I found:
[Code]....
(of course I filled in the username and password with the correct info)
When I went to use it again it threw this error:
System.Web.HttpException: The current identity (PHX3username) does not have write access to 'C:WindowsMicrosoft.NETFrameworkv2.0.50727Temporary ASP.NET Files'.
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Feb 7, 2011
Environment: Windows 2008 R2 x64 [IIS7.5]
irectoryInfo("D:MySecretFolder")
I get thrown the following error.
'System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed
Application pool is using NetworkService account as its identity and I have given that account full rights on that folder.
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Jul 12, 2010
in my web project i got an error that i couldnt find any solution. the error says: System.Security.SecurityException: Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. when i work in local there were no problem i put files to our server and i changed the database also. when i work in server in web application in Default.aspx i can connect db and get values without any problem using my DataLibrary
BUT the problem in my web service i also use my DataLibrary in webservice but when i try to run a method in web service it gives me the error which is : System.Security.SecurityException: Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
my new db connection is
strConnectionString = "Data Source=OURSERVERNAME\SQLEXPRESS;Initial Catalog=DoveTR;Persist Security Info=True;User ID=sa;Password=123456789;Pooling=True";
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Jun 21, 2010
I got the error
System.Security.SecurityException: Request failed.
when i use project dll in my code.
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Jul 8, 2010
I purchased a new computer and put all my development software on. Now when I load an asp.net 2.0 project I get the following error:-
Code:
Error3E:RPPResolve-ITASPDotNET2.0HansooKwanDirections.aspx: ASP.NET runtime error: Could not load file or assembly 'System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified. (E:RPPResolve-ITASPDotNET2.0HansooKwanweb.config line 44)E:RPPResolve-ITASPDotNET2.0HansooKwanDirections.aspx11E:...HansooKwan
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