VS Was Unable To Determine Code Access Security (CAS) Permissions
May 2, 2009
This program is a small ADOX database with a single data entry Form. Originally written in VB 2005, it was copied into the VB 2008 Project folder. Opening the file in the IDE, it went through the Conversion process, nevertheless, because of the following error detailed below, the program will not accept any changes.
Error List: Warning 1 Unable to find manifest signing certificate in the certificate store. AppointmentsMissed (<the project's name) Under Security in the project's Properties Window these suggestions are made: Visual Studio was unable to determine the Code Access Security (CAS) permissions that are applicable to your project. The most likely cause is that your project references a strongly-named assembly that defines custom permissions, but that is not properly installed in the global assembly cache (GAC).
To correct this, try the following: 1. Ensure that any custom permissions defining assemblies referenced by your project have been properly installed to the GAC. If any of these assemblies have been rebuilt or have had their version numbers modified, you must install the new assemblies in the GAC. 2. Restart Visual Studio.
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Apr 25, 2011
In my managed VB.NET code, I am able to write a file out to my desktop. Although, the statically referenced unmanaged code is unable to. I have hunted all over MSDN to find out how I can elevate the security permissions for this library method, but am unableto find anything.I declare the method as...Declare Sub WriteFile Lib "DataLog.dll" (ByVal fileName As String)Although, it throws an exception due to being forbidden from writing to the desktop. Is there an attribute
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Jul 27, 2010
I am getting the following error message when I try to call this program from a shared drive on our network;
System.Security.SecurityException: System.Security.Permissions.SecurityPermission
at EMAILVB.EmialVB.EmailVB_Load(Object sender, EventArgs e)
[code]....
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Nov 9, 2009
i am getting the error "System.security.permissions.securitypermission" when running the VB application in another machine. i have put the .exe file in the common path and i ran it my machine and it is working fine, but when i tried to run it in the different machine i am getting the error. Can anyone help me out in fixing this error.
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Dec 10, 2010
One of my application is taking a lot of time on Windows 7 compared to XP. What application basically does is it creates some PDF files reads the content and emits on a form and then deletes the files. I ran ANT profiler on both XP and Win 7, and i could notice some differences. On win 7 some CAS related methods are widely called and those method calls were missing on XP.. Is this the reason ? If someone has faced similar issues,
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Jul 11, 2011
I work on a vb.net winforms app where we currently are using simple roles for security. We enable/disable specific controls based on if the current user has the required role. We are to the point where this is no longer granular enough.Our application is based on different physical locations we call sites. A user might have permission to do something (for example, edit a site's configuration) at one site but not another. Therefore, we now need to lookup permissions based on current user AND current site. Also, a certain user's permissions may be very specific to themselves ie. no other user's permissions are exactly the same as another user's. Therefore we need a security model that's more permissions based rather than role based.
What's the best way to design a new permissions model that can meet these requirements? I want to make sure that it's easy to implement the checking in the code (I don't want a million if statements sprinkled in our SetUIPermissions methods) and we don't want to have to update every user (400+ and counting) each time we add a new permission. Because of this last requirement I think we need to keep the idea of roles but possibly add/remove exceptions for particular permissions for specific users
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Jul 14, 2008
I recently did a clean install of Windows 7 Home Premium and a reinstall of Visual Studio Professional 2008. I can't find the Framework Configuration anywhere. I have looked on the Start Menu and in the Control Panel and in Administrative tools. I need to find it so I can fully trust the network where my projects are located.
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Jul 8, 2010
I'm working with a vb.net 2005 project that i converted from vb 6.0 last year. It's working fine in windows xp, but on vista and windows 7 i get an error saying 'Insufficient security permissions to set the system time.' Can you think of any way to replicate this error on windows xp? I'm trying to get a windows 7 box setup at work but I was wondering if there was anything I could try with xp in the meantime.
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Sep 10, 2009
I have some sorce codes on my comp. and i am employing a few s/w guys for coding at my office i would like to know what type of security softwares / hardware i should install so that the employees do not copy my source codes and i would like to give them access to net but not to attach my source code. i have searched on net ...but as i lack the basics of this i am asking the favour from all u experts. most of the search has sent me to the links for antivirus or antispyware....and like wise.
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Mar 11, 2010
Assume a .NET class library code that, for example, writes to the Windows registry. Then this code has problem to run over internet, because default Internet policy does not give access to write to the registry.By adding a RequestMinimum statement in the assembly we can specify that the code requires permission to write to write to the registry. This will not alter the fact that the code does not have the permission, but will stop the assembly from loading; the runtime will throw a System.Security.Policy.PolicyException and identify the permission that is required.Do you now any other examples of using evidence, security policy and permissions (the key elements of code-access security) to prevent an assembly from loading on a web server?
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Sep 8, 2010
I wrote a custom assembly for SSRS that returns a jpeg for the background image in a textbox on the report.I followed all instructions on msdn in regards to security but i still receive the same error.
Below is my config information
<pre lang="x-xml"><PermissionSetclass="NamedPermissionSet"
version="1"
name="Barcode">
[code].....
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Apr 15, 2010
I am not sure about the semantic of "ApplicationDirectory" membership condition. I am trying to use it in the .NET Framework 2.0 configuration tool. The tool's explanation to it is as below:
The Application Directory membership condition is true for all assemblies in the same directory or in a child directory of the running application. Assemblies that meet this membership condition will be granted the permissions associated with this code group.All the other membership conditions such as strong name, hash, allow me to input some criterias, only the Application Directory has not. So how to use it?
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Jun 8, 2009
I am trying to create a function that will return a pen(System.Drawing.Pen to be exact) that will have a random color and width. I thought that something like this should do the trick:
Public Function random_pen() As Pen
Dim clr As Color = Color.FromArgb(255, random_rgb_color_gen, random_rgb_color_gen, random_rgb_color_gen)
Dim pn As Pen = Pens.PeachPuff 'just a random color else i get a null exception...
pn.Color = clr ' the error is here
[Code].....
However when the code is run i get an Argument Exception with the error message:"System.ArgumentException was unhandled Message="Changes cannot be made to Pen because permissions are not valid.""
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Dec 29, 2009
I am exploring ways of implementing access control permissions in a VB 2008 Windows Application.This is an application for a non-profit where users would log in and depending on their group membership (ie. warehouse, accounting, etc.) some forms would be available while others are not. (eg Warehouse cannot view donor info) Additionally some groups can view information but not alter (add, delete, edit) information.groups who are denied permissions would not be able to open certain windows forms. The question is what is an efficient method of creating this permission structure and how would it be implemented in the application?
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Nov 23, 2010
My software uses a Microsoft Access .mdb file and text files for data storage. The program works great when debugging but when I install the program with Windows installer, the program gives as exception message that access is denied to read the mdb and the text files. What should I do?
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Mar 11, 2010
I have an application that is writing a comma separated values file. How would I go about altering the permissions of that file from .NET - for example to give read-only permissions to a particular active directory group?
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Jun 9, 2011
Below is the part code I currently use to write to a file,
Try
Using sWriter As New IO.StreamWriter("C:Tmp.txt", False)
sWriter.Write(m_Buffer.ToString) : sWriter.Flush()
End Using
Return True
Catch ex As IOException
End Try
But some time this results in error
Access to the path 'C:Tmp.txt' is denied
My question is, Is there a safe way of detecting File access permissions, without handling exceptions, I mean if I can some how check before opening a file for any filehandle opened for it.
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Aug 6, 2011
I am building a permissions system in vb.net against the normal Windows Server file system. Have not decided on the best method, but is there a way to get access to some kind of internal GUID that Windows might store for a folder. If I just store the path for security, then it quickly becomes very hard to update a database storing path information to get security information. If a folder had some kind of internal GUID structure that would be great. Is this available?
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Feb 27, 2009
I have some code that queries all the printers on our print server and returns a list. I need this code to work so please don't reply with comments asking why I am using it when you can simply type \Server to list the printers (I know this, but need the code to work as part of a larger application). When running the following code on an IT PC with admin rights, it works. When running on a restricted user PC, it doesn't. How can I add permissions in code to elevate the EXE to 'run as administrator'? [Code]
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Jan 17, 2011
I've been struggling with this problem in VB.net for a while: whenever I try to access the My Documents, My video's or simular in Windows 7, I get an access denied error. The program that uses this code is a file-backup application, so it's important it can access everything. The app has admin rights, using this line:requestedExecutionLevel level="requireAdministrator" uiAccess="false" />
To confirm, I also get a nice UAC popup when starting.The app accesses the files twice. Once to calculate the file size, and once to actually copy the files. Here is the file-size calculation code (that I found online:) Function GetFolderSize(ByVal DirPath As String, ByVal includeSubFolders As Boolean) As Long
[Code]...
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Apr 30, 2010
I've been struggling for hours now to get some working code to list the share permissions of a remote share. I've got WMI code which uses win32_share which lists the shares and path and it works great. I"m now trying to add in a routine to get the share permissions as well.
I've searched just about every site for some sample code and can only find some C# (I think) code.
[Code]...
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Aug 30, 2010
How to use this code on security installation?
Public Function GetHDSerial() As String
Dim disk As New ManagementObject(_
"Win32_LogicalDisk.DeviceID=""C:""")
[CODE]...
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Apr 27, 2011
I have an ASP.Net portal like application with multiple roles. I have placed the subpages of that role in its own directory adding a web config with an authorization allowing only that role. I have css and javascript in the root directory that can not get access inside the protected role folders. How can I allow these folders css/js to have access to all roles. Sorry if this is easy question I have searched but I am rather new to ASP.NET
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Nov 23, 2011
I have a file accdb with password, now, i want to connect it and a project in VB 2010
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Dec 8, 2011
I am creating an application that will compile code at runtime and then execute that code. My worry is this: Someone might make a malicious script, that deletes files for example. Is there an option in VB.NET that prevents Kill statements and other file operations from executing? Maybe a kind of 'security' feature? If not, is there another approach that I should take?
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Mar 5, 2012
We are in the process of upgrading to WIN7 support and finding issues with the existing impersonant security model we previously used. So i am looking for suggestions before we hit the code.Application ABC.exe is running on a PC with restricted permissions
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Mar 31, 2012
I made a password protected program, but I wanted to make a reset password via security code. I made this, but it will not work for some reason. It seems like it'll work for the first time, but then when you try to set the password, it stills shows that the password is there and when I go into the reset password form and do it again, but then it say its incorrect.
[Code]...
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Jan 11, 2010
Trying to read key "HKLMSOFTWAREPoliciesMicrosoftWindowsWindowsU pdateAU" value "AUOptions" and get the following : A first chance exception of type 'System.Security.SecurityException' occurred in mscorlib.dll Error occurs in ReadRegistry key SOFTWAREPoliciesMicrosoftWindowsWindowsUpdate AU : Requested registry access is not allowed. This occurs in my vb.net application when application is run under an account called OPER in the USERS group. The application :
1/is on my PC's hard drive, its not a web app or on a network share
2/is launched via a desktop click
3/ has a manifest specifying executionlevel "AsInvoker"
It does not occur when the Application is run as an Administrator. It does not occur if I read the value with a non .NET program when logged in as OPER whch makes me think it is a .NET problem not a registry permissions problem. Examining "Effective Permissions" shows that my OPER login has query value permission.I need the application to be able to read the key like the non .NET application while running at USERS level.
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Apr 7, 2009
I've got this program I'm working on in VisStudio2008. Basically, it accepts a password and executes an Access 2003 database using the Access 2003 runtime. I've got the thing looking up a password and all is good, but there's one problem those annoying Access 2003 and higher warnings about unsafe macros. Does anyone know a way to make sure those don't show up when the program starts?My client has a database that someone else wrote for her. She's not at a point where she could have it rewritten (believe me, I've tried to talk her into that). So I have to stay in Access but it's not very professional to have those warnings come up.
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Apr 3, 2012
I need some help in the creation of a program to generate a security code based on the current date. I need to create something that first multiplies the MMDDYY (ie X=MM * DD * YY) then also adds the MMDDYY then finds the remainder and then multiplies but a specified number. I would like to create a small program that sits in the system tray with this code displayed. The code will always need to be 6 characters, so I might need to pad it with zeros. It has been years since I took basic VB, and I am really rusty.
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