Security :: Change .Net App To TRUST=MEDIUM On Shared Server?
Mar 5, 2010
I've developed a dot net website that runs fine on my localhost. When I upload it to my ISP on a shared hosted site, I receive the following: "Required permissions cannot be acquired." I've been informed that I need to change my website to medium trust. Can someone get me started in the right direction on how this is done? When I add <trust level="Medium" originUrl="" /> to the web.config it won't BUILD on my local host and when I add it to the web.config on the shared site, it gives me"This configuration section cannot be used at this path. This happens when the site administrator has locked access to this section using <location allowOverride="false"> from an inherited configuration file."
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Dec 3, 2010
On my PC everything is all rigth but on the webserver I get an error: 'OrderBy' is not a member of 'System.Array', maybe due to the trust level. Is there I way to bypass this or I have to resign myself to it?
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Aug 24, 2010
I am trying to use SqlCacheDependency in my web site.I got in touch with my hosting compnay and they said that they support cache but they set the trust level to medium and what I try to do needs full trust level whihch they cannot provide for me.
can someone show me a way or a code samples that use SqlCacheDependency with medium level trust?
the broker is enabled in the hosting sql server
this code raise the error that the hosting providers said that they cannot support in medium level:
System.Data.SqlClient.SqlDependency.Start(ConfigurationManager.ConnectionStrings("myConnectionString").ConnectionString)
I have the tables needed in my developer SQL server , but I don't know how or if I can set it in the hosting SQL server db
and this is my code to get the data from cache or from DB that works on my developer station:
If Cache("allitems") Is Nothing Then
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Jul 7, 2010
I download a webchart.dll file and used it in my application. Everything went right on my local machine. But issue came when i uploaded the file on the server. I am getting trust level medium issue. The assesmbly doesnot run on medium trust level. How can i run assembly in medium trust level.
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Jan 13, 2010
I have an unsigned custom assembly, that has been deployed to the bin folder of my website. Trying to access a page that explicitly serializes a list using LOSFormatter produces the following exception:
System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
at System.Security.CodeAccessSecurityEngine.SpecialDemand(PermissionType whatPermission, StackCrawlMark& stackMark) at System.Security.CodeAccessPermission.DemandInternal(PermissionType permissionType) at System.Runtime.Serialization.Formatters.Binary.ObjectWriter.Serialize(Object
graph, Header[] inHeaders, __BinaryWriter serWriter, Boolean fCheck) at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize(Stream serializationStream, Object graph, Header[] headers, Boolean fCheck) at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize(Stream
serializationStream, Object graph) at System.Web.UI.ObjectStateFormatter.SerializeValue(SerializerBinaryWriter writer, Object value) The action that failed was: Demand The type of the first permission that failed was: System.Security.Permissions.SecurityPermission
The Zone of the assembly that failed was: MyComputer --- End of inner exception stack trace --- at
System.Web.UI.ObjectStateFormatter.SerializeValue(SerializerBinaryWriter writer, Object value) at System.Web.UI.ObjectStateFormatter.Serialize(Stream outputStream,
Object stateGraph) at System.Web.UI.ObjectStateFormatter.Serialize(Object stateGraph) at System.Web.UI.LosFormatter.SerializeInternal(TextWriter output, Object value) at System.Web.UI.LosFormatter.Serialize(TextWriter output, Object value) at Imbibe.DNN.Controls.CollectionEditorControl`2.SaveViewState()
at System.Web.UI.Control.SaveViewStateRecursive() at System.Web.UI.Control.SaveViewStateRecursive() at System.Web.UI.Control.SaveViewStateRecursive()
I contacted my Hosting provider, and this was the reply:
This error is coming because your DLL Imbibe.DNN is developed in Full trust. We don't support full trust on shared server. You need to re-compile it again under medium trust. Now, what I am not aware of any option for compiling an assembly for medium trust. Can anybody here please desrible, how do I compile an assembly specifically for medium trust? I added the AllowPartiallyTrustedCallers attribute to the assembly manifest, but it did not resolve the problem.
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Feb 22, 2010
We just moved our site (still in development) to a new hosting company, on a medium trust shared environment. We setup the databases, aspnet_users tables etc, but now our page that handles new people signing up doesn't work. It contains a simple standard <asp:CreateUserWizard> control. However, this page is not working since the move (the rest of our pages are working). We get this compiler error:
Request for ConfigurationPermission failed while attempting to access configuration section 'system.web/machineKey'. To allow all callers to access the data for this section, set section attribute 'requirePermission' equal 'false' in the configuration file where this section is declared.
Apparently the hosting company is using the default medium trust .NET settings. We have no idea how to get around this since we've always developed on full trust dedicated server environments. Is it simply a fact that the <asp:CreateUserWizard> control does not work in medium trust, or is there a way?
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Jan 8, 2010
i wrote all my code on my computer so i had a high trust level, after ftping my site and database to godaddy.com i realized they have a medium level trust enviroment.... i called the tech support and they said they were sorry but they couldnt change it for me... heres my code. any idea how to get it to work in medium level trust? I am trying to create a new directory where all of a users upload goes. The folder is created dynamically when the upload page loads.
string username = User.Identity.Name;
string UpPath;
UpPath = "~\Users\UserUploads\" + username + "\";
if (!Directory.Exists(UpPath))
{
Directory.CreateDirectory("~\Users\UserUploads\" + username + "\");
}
how to get this working in medium level security?
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Jan 27, 2010
Presently i am working on bulk Sms module in Asp.net.In this i am using a window Api "WinINet"
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Nov 21, 2010
I'm working on a project in ASP.Net, and it requires reading/writing to files on my server. I'm hosted at GoDaddy, and they swear they've got me at Medium Trust. When I try to read or write files that are in my own domain, I get Security Exceptions. I've tried multiple ways of opening/saving the files and they all return security errors. Here's the most recent error and offending line of code (I didn't save them all, they're all pretty much the same thing):
Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.MediaPermission, WindowsBase, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' failed.
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Feb 10, 2010
The website is on a shared hosting server with the trust levels set to medium.
I am sending an e-mail from the website (to confirm a booking) and need to attach a PDF doc (directions) with the mail.
The server is rejecting the mail because of the trust level.
My code line for the attachment is:
//mail.Attachments.Add(new System.Net.Mail.Attachment("c:/Domains/booking.proteafarm.co.za/images/DirectionsToProteaFarmMontagu.pdf"));
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Feb 11, 2011
I have to host a wcf service in a medium trust environment.I want to know which bindings are supported while hosting WCF services in medium trust. There is a MSDN article
http://msdn.microsoft.com/en-us/library/bb412171.aspx which talks about partial trust. I am not sure is it the same as medium trust.
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Jul 17, 2015
Web hosting provider has set the .net trust level as Medium. so report viewer & crystal reports are not working. it required full trust.so is it possible to execute the reports in medium trust? and how?
ReportDoc.Load(Server.MapPath("~/Reports/Proposal.rpt"));
DataTable dt = cm.DisplayUserInfo("select * from tblProposal_Master where proposal_id='000006'").Tables[0];
ReportDoc.SetDataSource(dt);
CRV.ReportSource = ReportDoc;
CRV.DataBind();
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Feb 3, 2010
Im running an ASP.NET MVC application hosted with Mosso, there are telling me that they cannot enable DTC because they run everything in medium trust.So when executing code that references: TransactionScope I get the following error. The transaction manager has disabled its support for remote/network transactions. (Exception from HRESULT: 0x8004D024)
Is there anyway to get around this?
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Sep 4, 2010
what Medium Trust level is ?And what does it mean :
"More and more ASP.NET hosting providers are enforcing a Medium Trust Policy on their servers.Therefore it is important to make your website work (as much as possible) in environments where medium trust is enforced."
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Apr 23, 2010
I am using GhostScript to generate some thumbnails of PDF pages in an ASP.NET application. I have it wrapped in this library called GhostScriptSharp that just uses DllImport to call methods in the GhostScript DLL.It looks like this wont work on a medium trust hosting environment, either because of the fact that it is calling unmanaged code, or that it looks like the library is creating files all over the place (outside my virtual directory). I ran Process Monitor and saw it trying to Read, QueryNameInformationFile, CreateFile and QueryStandardInformationFile in places like:
C:WINDOWSsystem32HalftoneDefault
or
C:gsgs8.63libHalftoneDefault
or
C:gsfontHalftoneDefault
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Jan 22, 2010
I am trying to get a simple prototype using ASP.NET S#arp-architecture (Sharp architecture) to run on a shared hosting site. This site runs in medium trust, which appears to give problems with this framework. At first I went off on a wild goose chase with the mySQL.data.dll, but the latest version already supports partially trusted callers. The only way I found up until now is this blogpost, which basically describes re-compiling everything from the ground up, starting with the various Castle components. Is this the only way to get this to work, and more importantly, does this actually work?
I have had some good experiences with S#arp-architecture, and since I only have a few days to build this prototype, I figured S#arp-architecture would be a good match. So, my options are to stick with SA, or on the other end of the spectrum to hand-roll an MVC/NH/mySQL application.
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Sep 1, 2010
I'm following this document in order to run my website in a medium trust environment. My web app uses OleDb, so I need to give it permission in medium trust. I've done everything that is in that article and it's still not working In my web_mediumtrust.config I've added the following security class:
<SecurityClass Name="OleDbPermission" Description="System.Data.OleDb.OleDbPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
And the following permission set:
<PermissionSet class="NamedPermissionSet" version="1" Name="ASP.Net">
<IPermission class="OleDbPermission" version="1" Unrestricted="true" />
</PermissionSet> [code].....
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Oct 7, 2010
I'm building an ASP.NET MVC site where I want to use OpenSTV to conduct polls. To run results through OpenSTV, I'd have to run the executable. Is that allowed from a medium-trust ASP.NET application?
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Jan 17, 2011
I need to generate PDF reports on a server where full trust apps cannot run.(i cannot use PdfSharp and MigraDoc because of security exceptions when i say
PdfDocumentRenderer renderer = new PdfDocumentRenderer(true, PdfSharp.Pdf.PdfFontEmbedding.Always);
renderer.Document = doc;
renderer.RenderDocument(); // <<< ex here
renderer.PdfDocument.Save(filePath);
Message: Request for the permission of type 'System.Security.Permissions.SecurityPermission, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.so i need to
have asp.net c# pdf generator that runs on Medium Trust or Low trust OR be able to pass values from asp.net c# to any php pdf generator.I am trying itextsharp-5.0.5,
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Dec 21, 2010
Together with Ben (@BuildStarted), we've been building the RazorEngine project, which is designed to allow you compile and parse arbitrary templates outside of ASP.NET MVC. The project has had a couple of releases for a while now, and the feedback has been greatBut, we have encountered an issue: Medium trust.
Because we are using the CSharpCodeProvider to compile the Razor-generated classes (to load into the current AppDomain for execution), we encounter a SecurityException when trying to invoke it, due to the LinkDemand enforced on it. When a normal ASP.NET page is compiled (regardless of trust level), it does so through a BuildProvider which is normally GAC'd, and thus is implicity granted the appropriate permissions to compile. Hence ASP.NET WebForms works as standard in Medium trust.
Our code does not, and we need to target scenarios where our built library won't be deployed to the GAC and is running in Medium trust. So we considered building a BuildProvider specifically for it and defer compilation to the ASP.NET build system, but this seems overly complex and disjointed, and the provider itself requires both a mapping through a file extension, and a virtual path (which may or may not resolve to a physical file - think VirtualPathProvider). It all seems overkill, just to get the project working in Medium trust; not just that, but purely for ASP.NET projects as our engine also works outside of ASP.NETSo my question is this, does anyone know of any techniques or technologies for compiling C# code in a Medium trust environment?
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Nov 30, 2010
Is it possible to get session cookie name in medium trust level? The code below works in full trust, but throws a security exception in medium trust level.
string sessionCookieName = ((SessionStateSection)WebConfigurationManager.GetSection("system.web/sessionState")).CookieName;
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Jan 11, 2011
I want to ask that which methods/classes are allowed in Medium Trust.For example, whether these methods are allowed?
GetProperties,
GetMethods,
Activator.CreateInstance,
Assembly.Version,
AssemblyName.Namez
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May 27, 2010
I need to load an xML file from the bin folder in ASP.NET (MVC, not that it would count). I can't get the bin folder path nor load the file otherwise.. I need to feed the following method :
using(var file = System.IO.File.OpenRead(/* something */))
{
}
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Mar 8, 2010
I'm trying to get the entity framework working in medium trust. I've tried splitting the files and using a separate assembly but I seem to have one problem after another.I moved the EDMX to a separate assembly, which causes a single .dll to be outpit to the sites /Bin directory. I'm referencing this as below from web.config.
<add name="ApplicationDB" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|Application.mdf;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient" /> [code]...
Whenever I try to access one of the entity classes, I get an ArgumentException: 'An item with the same key has already been added.' It's critical this works with medium trust, but I seem to be running out of options.
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Apr 11, 2010
I'm doing shared hosting with GoDaddy and I developed a sample ASP.NET MVC app using Castle Windsor and unfortunately, it didn't work in a medium trust setting. Specifically, I got this error: "[SecurityException: That assembly does not allow partially trusted callers"... etc. GoDaddy is sadly not flexible in their trust policy.
I'm not tied to Windsor and would like to try another one that will work under Medium Trust. I'd actually like to use NInject, but I've read people having mixed success. The only one I've read that works with no problem is Microsoft's Unity.My question is, does NInject work in medium trust? If not, what are my options?
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