Custom Assembly Security

Oct 3, 2007

Hello Everyone,

When I run my report from report manager, I get the following error message

Failed to load expression host assembly. Details: Request for the permission of type 'System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

My report uses a custom assembly. I have already done the following

1. copied the assembly in the "reportserverin" and the "common 7privateassemblies" area
2. Made the following entry in the rssrvpolicy.config

<CodeGroup
class="UnionCodeGroup"
version="1"
PermissionSetName="FullTrust"
Name="RSUtil.TranslationHelper"
Description="Translation Helper Utility">
<IMembershipCondition
class="UrlMembershipCondition"
version="1"
Url="C:Program FilesMicrosoft SQL ServerMSSQL.5Reporting ServicesReportServerinAMOTest.dll"
/>
</CodeGroup>


3. Added the following line to my assemblyinfo.cs file

[assembly: AllowPartiallyTrustedCallers]

regards,
Abhishek.

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Oct 14, 2005

Hello there I have trying to figure out for days how to enable FullTrust for my Reporting Services security extension.

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Feb 26, 2008



Hi,

I'm trying to do something rather weird, but I really need it. I'm trying to launch a SSIS package from a report

I built a custom assembly with one method that loads a package from file and then executes it. The assembly works fine.

I added the custom assembly to the report properties, instantiated the class in the assembly (the method is not static), called the method from the report (a textbox renders the string return value from the method).

I added the


Code Snippet[assembly: System.Security.AllowPartiallyTrustedCallers]
attribute to the AssemblyInfo.cs file

Created the strong name for the assembly.

Got the PublicKeyBlob with ILDASM, used it to add a new CodeGroup with the "StrongNameMembershipCondition" in the policy configuration files of ReportDesigner (RSPreviewPolicy.config), ReportServer (rssrvpolicy.config) and ReportManager (rsmgrpolicy.config).

Copied the dll in the bin folders of ReportServer and Visual Studio PrivateAssemblies.


I keep getting the awfull #Error message on the report when viewing it from ReportManager or ReportServer (in preview mode in VisualStudio all is well because security is not applied to user code).


I tried debugging:
- created a solution with two subprojects, one is the report, the other one is the assembly
- marked the report as the Startup Item
I get a SecurityException in debug and debuglocal modes when I try to instantiate a SSIS package.



Code SnippetPackage = new Package();

While digging in the exception call stack, it turns out I lack a permission for accessing unmanaged code (the source assembly of the exception is mscorlib). Also in the ouput window, while starting debugging i see a lot of SystemArgument exceptions in mscorlib.

I am perfectly aware that in order to be able to launch a SSIS package from code I referenced Microsoft.SqlServer.DtsRuntimeWrap.dll, so in desperation I added another CodeGroup in the aforementioned config files for this dll (StrongNameMembershipCondition) and copied the assembly in the deployment folders.


1: I would really like to know how to get the whole thing working. I find rather strange that even though I set the FullTrust

PermissionSet for my assembly (and the Microsoft.SqlServer.DtsRuntimeWrap assembly) I keep getting security exceptions.

While exploring the web for help I saw I need to assert all individual permissions for every restricted resource I'm accessing in the custom assembly, problem is I don't know exactly which ones I'm accessing and, being new to .NET security, I don't know how.

Surely I need to assert a file IO permission to load the package from file, a sqlclientpermission if I am accessing SqlServer in the package, and perhaps a unmanagedcode permission, given the the exception I described earlier (perhaps the Microsoft.SqlServer.DtsRuntimeWrap assembly is not managed code or is accessing some other unmanaged assembly).

Again, I wouldn't know how.

...and last

2: I tried modifying the assembly to only load a string from a file.. I had some problems with security but I got it working once, but I haven't figured out how exactly 'cause when fiddling around to understand things, I lost the working configuration. Really stupid, I know....
While testing this version of the assembly I followed an advice I found on some blog and restarted IIS and Reporting Services system service..

Is this always necessary after modifying the assembly source ? Do I need to restart every time both IIS AND Reporting Services

I would really appreciate every bit of help or advice anyone has to offer.

Thanks in advance.

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Hello experts,

I need some help please.
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I get the error: "Could not load file or assembly .....The system cannot find the file specified."
After red the threads I tried to use gacutil.exe to add my assembly to the cache.
This action fails with the error:€? Failure adding Assembly to cache. Attempt to install an assembly without a strong name.€?
After that I tried to build a strong name through the follow execute:
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What made me wrong?
Is there an easier workaround?
Have someone a good Idea could help me?

Hope to hear you soon.

Best regards,
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Hi,

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For example, maybe I could return from the call a Dataset and bind it as a DataSource which then can be bound to a Table, or maybe a array of string.

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Hi there

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Am I missing something?

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I have developed a custom assembly to render a signature from an array of bytes in an SSRS Image control. The assembly works perfectly in the designer. It is strong-named and has the AllowPartiallyTrustedCallers attribute applied to it; I have deployed the assembly to the "%SQL SERVER%MSSQL.3Reporting ServicesReportServerin" folder; given it fulltrust permissions in the rssrvpolcy.config file; made sure that the NTFS file security is correct; and the assembly just doesn't appear to be called. The assembly doesn't execute when I use the "F5" popup preview mode on my development machine, either.

I don't get any error messages in the report, I just don't get any image output, either. The rest of the report elements render correctly. Of course, the SSRS log files are useless. Enabling the Verbose trace switch doesn't yield any useful information, I don't think, except that in the lines pertaining to running my signature-enabled report there are no mentions of even attempting to use my custom assembly.

I have attempted to enable object access auditing (both success and failure) to determine if my assembly is even being accessed by SSRS and there are no audit messages in the Security Event log.


Can anyone offer any other troubleshooting suggestions?

Thanks,
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Msg 10300, Level 16, State 2, Line 6

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Mar 25, 2008

I have a custom assembly that I'm trying to use with my resport in Reporting Services in SQL Server 2008.
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- I added <Assembly: AllowPartiallyTrustedCallers()> attribute to the assembly
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- I went in .net 2.0 Framework configuration and made the assembly fully trusted
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Hi,

I use vs2005 and ssrs 2005.
I have an assembly like

namespace PackageCode

{


public static class Class1

{

public static string GetRequired(bool Split, string Id_StockItem, string InventoryUpdateQuery, string TotalRequired)

{


string outText = "";

return "Test"

...........

I did the
reportViewer.LocalReport.AddTrustedCodeModuleInCurrentAppDomain
(€?PackageCode, Version=1.0.0.0, Culture=neutral, PublicKeyToken=6d1c15bd232054a1€?);
part in my code.

I also added the
[assembly: System.Security.AllowPartiallyTrustedCallers]
too.

I published the assembly to GAC.

I added the dll as reference in rdlc file.
And I get this error when I try to enter this code under a textbox


=PackageCode.Class1.GetRequired(CBOOL(Fields!Split.Value),CSTR(Fields!StockItem),.....)

GetRequired is underlined with a red error line which says "unrecognized identifer" when I mouseover onto it.
And when I run the report I get #Error in that textbox.

I dont have a reporting server.I get the data from a dataset.
What to do now ?
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namespace Calculations

{

public class calcPercentage

{

public static decimal Percentage(decimal decValueOne, decimal decValueTwo)

{

decimal decPercentage = 0;

if (decValueOne == 0 || decValueTwo == 0)

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decPercentage = 0;

}

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{

decPercentage = (decValueOne - decValueTwo) / decValueOne;

}

return decPercentage;

}

}

}

Then in my textbox I put:

=Calculations.CalcPercentage.Percentage(SUM(Fields!PreviousYTDExpenseAmount.Value, "Template_OutputData_Sales"), SUM(Fields!PreviousYTDExpenseAmount.Value, "Template_OutputData_CGS"))



I referenced the assembly and added it to C:Program FilesMicrosoft Visual Studio 8Common7IDEPrivateAssemblies and I still get that error message so I do not know what the problem is.



The line where the exception occurs happens here:

byte[] bytes = MyReport.rvOutput.LocalReport.Render("PDF", null, out mimeType, out encoding, out extension, out streamids, out warnings);





Thanks so much for you help! If you have any suggestions about my next error...i'm all ears!

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I designed dll file to get data from sql server, i am calling the dll from ssrs 2005
in preview , everything is ok but after deploying and put the dll file in C:Program FilesMicrosoft SQL ServerMSSQL.3Reporting ServicesReportServerin and add this to rssrvpolicy.config

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I'm at a complete loss now as to why my deployment cannot run this code. As far as debugging goes, Visual Studio is not located on the reporting server, nor is it an option to have it put there. I've been able to run the code with the web service lines commented out, but as soon as I put even the webservice.Credentials = CredentialCache.DefaultCredentials in I'm greeted with the nice and calming #Error.

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Aug 10, 2007

We have a custom assembly that worked fine with SSRS 2000. Now that we have upgraded to SQL 2005 we get an "Access is denied" error when attempting to deploy reports that reference this assembly. I could swear that when we first attempted it it worked. We decided to make a minor change to the assembly code and that's when the problem started, even though I've since reverted back to the original code to make certain that the minor change wasn't the issue. The assembly is in the proper folder - C:Program FilesMicrosoft SQL ServerMSSQL.2Reporting ServicesReportServerin - and the reports are referencing the current version. I've searched high and low on the web for an answer but have found nothing even remotely helpful. All this code does is return a string...it's not doing anything that should require any additional security; and even then I doubt if there would be a problem when deploying.


The full text of the error is:
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Mar 7, 2006

Hi all,

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The scenario is that:
A text box into my report require a function contained into MyCustom.dll. This code do read information from MyCustom.dll.config.

This file contains:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<connectionStrings>
<add name="IS2009cfg" connectionString="data source=servernameinstancename;initial catalog=dbname;user id=xx;password=yy;" />
</connectionStrings>
<appSettings>
<add key="DefaultHeaderLogo" value="This is a test" />
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Using
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Also using
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copy "...mydeveloplocation...inDebugMyCustom.dll" "C:Program FilesMicrosoft Visual Studio 8Common7IDEPrivateAssembliesMyCustom.dll"
copy "...mydeveloplocation...inDebugMyCustom.dll.config" "C:Program FilesMicrosoft Visual Studio 8Common7IDEPrivateAssembliesMyCustom.dll.config"
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Many thank's in advance

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Turin - Italy





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Mar 25, 2008



We use reporting services to report on our SQL 2005.

I wanted to have a function that translates a filter (parameter) in one RDL from IDs to Names to be able to show a summary of what the user selected when he executed the report.

Instead of writing this function in the .Code, I said great, lets use custom assemblies.


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Hi there.

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In A1 there is a bit of code which uses the Assembly.Load() method, so load another assembly and use instances of class found in that external assembly. However, when I run the managed stored proc in A1 that uses Assembly.Load() I get the error:

Could not load file or assembly 'A1, Version=1.0.0.0, Culture=neutral,PublicKeyToken='????' or one of its dependencies. The system cannot find the file specified.

(note: for security I've changed some of the above line).

So I changed the Assembly.Load() to use

System.Data,Version=2.0.0.0,Culture=neutral,PublicKeyToken=b77a5c561934e089

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I am using the QRCode4CS class [URL] .... to generate QR codes.

I can use the following code to successfully return a bitmap image to a picturebox in a Windows Form Application.

public class CreateQRCodeClass
{
public static Image CreateQRCodeImage(string inputString)
{
QRCode4CS.QRCode qrcode = new QRCode4CS.QRCode(new QRCode4CS.Options(inputString));
qrcode.Make();
[Code] ....

In trying to adapt the same code (below) to display a QR code in an SSRS report I get the error "There is an error on line 1 of custom code: [BC30311] Value of type 'System.Drawing.Image' cannot be converted to '1-dimensional array of Byte.'

Here is the custom code I am using.

Public Function QRCode(ByVal RetailerId As String) as Byte()
Return QRCode4CSCreateQRCode.CreateQRCodeClass.CreateQRCodeImage(RetailerId)
End Function

Here is the revised custom assembly.

public class CreateQRCodeClass
{
public static byte[] CreateQRCodeImage(string inputString)
{
QRCode4CS.QRCode qrcode = new QRCode4CS.QRCode(new QRCode4CS.Options(inputString));
qrcode.Make();
Image canvas = new Bitmap(86, 86);

[Code] ....

What data type can I successfully return to SSRS to display the image?

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.NET Permissions Error in Reporting Services when not using a custom assembly:
I need help resolving a permissions error I€™m taking in a SQL RS 2005 report.
I have a report that that is includes the following code fragment in Report Properties -> Code:
Function rtf2text(ByVal rtf As String) As String
Dim rtfcontrol As New System.Windows.Forms.RichTextBox
Try
rtfcontrol.Rtf = rtf
Return rtfcontrol.Text
Catch ex as Exception
Return ex.Message
End Try
End Function
I reference the .NET System.Windows.Forms DLL under Report Properties -> References -> References, Assembly Name (heading):
System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
I have a text box with the following expression:
=code.rtf2text(First(Fields!EndingQuoteComment.Value, "QuoteHeader"))
And I€™ve verified, by removing the code.rtf2text command that is populated with the following:
{
tf1ansiansicpg1252deff0deflang1033{fonttbl{f0fromanfprq2fcharset0 Times New Roman;}{f1fnilfcharset0 Arial;}} viewkind4uc1pardif0fs32 ** Ending Quote Comments **par 0i0f1fs17par }
When I run the preview in Visual Studio is correctly strips the RTF and displays just €œ** Ending Quote Comments **€?. When I €˜RUN€™ locally or deploy to a SQL RS 2005 Server and run the report I take the following error:
Request for the permission of type 'System.Security.Permissions.UIPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
I€™ve tried everything that I can think of on the server to make this work.
I finally put together a Win 2003 box with SQL 2005, IIS, and RS 2005 running on it in a virtual machine to be 100% sure I had a standard clean install and deployed the report and I€™m getting the same error.
Below I€™ve included a basic standalone RDL file that demonstrates my issue. I get the error referenced above when I deploy the RDL below. Any ideas or suggestions are greatly appreciated?

<?xml version="1.0" encoding="utf-8"?>
<Report xmlns="http://schemas.microsoft.com/sqlserver/reporting/2005/01/reportdefinition" xmlns:rd="http://schemas.microsoft.com/SQLServer/reporting/reportdesigner">
<BottomMargin>0.25in</BottomMargin>
<RightMargin>0.25in</RightMargin>
<PageWidth>7.75in</PageWidth>
<rdrawGrid>true</rdrawGrid>
<InteractiveWidth>7.75in</InteractiveWidth>
<rdnapToGrid>true</rdnapToGrid>
<Body>
<ReportItems>
<Textbox Name="textbox21">
<Left>0.25in</Left>
<Top>0.25in</Top>
<rdefaultName>textbox21</rdefaultName>
<Width>6.375in</Width>
<Style>
<PaddingLeft>2pt</PaddingLeft>
<PaddingBottom>2pt</PaddingBottom>
<FontSize>7.5pt</FontSize>
<PaddingRight>2pt</PaddingRight>
<PaddingTop>2pt</PaddingTop>
</Style>
<CanGrow>true</CanGrow>
<Height>1.375in</Height>
<Value>=code.rtf2text("{
tf1ansiansicpg1252deff0deflang1033{fonttbl{f0fromanfprq2fcharset0 Times New Roman;}{f1fnilfcharset0 Arial;}} viewkind4uc1pardif0fs32 ** Ending Quote Comments **par 0i0f1fs17par } ")</Value>
</Textbox>
</ReportItems>
<Height>5.25in</Height>
</Body>
<rd:ReportID>8804486c-882f-493c-8dfb-b2f778a24b21</rd:ReportID>
<LeftMargin>0.25in</LeftMargin>
<CodeModules>
<CodeModule>System.Windows.Forms, Version=2.0.50727.42, Culture=neutral, PublicKeyToken=b77a5c561934e089</CodeModule>
</CodeModules>
<Code>Function rtf2text(ByVal rtf As String) As String
Dim rtfcontrol As New System.Windows.Forms.RichTextBox
Try
rtfcontrol.Rtf = rtf
Return rtfcontrol.Text
Catch ex as Exception
Return ex.Message
End Try
End Function </Code>
<Width>7.25in</Width>
<InteractiveHeight>10in</InteractiveHeight>
<Language>en-US</Language>
<TopMargin>0.25in</TopMargin>
<PageHeight>10in</PageHeight>
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Jan 4, 2008

I have successfully compiled & deployed the custom security extension. Currently I am having some runtime error when using the added Membership.Data.dll for authentication & authorization.

Membership.Data.dll
* signed with a strong name key
* [assembly: AllowPartiallyTrustedCallers] is added
* it uses Microsoft.Practices.EnterpriseLibrary.Data.dll for database connection

I have also added connectionstring to web.config(s) under ReportManager and ReportServer.


Here is the exception:

System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.Security.SecurityException: That assembly does not allow partially trusted callers. at System.Security.CodeAccessSecurityEngine.ThrowSecurityException(Assembly asm, PermissionSet granted, PermissionSet refused, RuntimeMethodHandle rmh, SecurityAction action, Object demand, IPermission permThatFailed) at Membership.Data.DataProvider.Acquire(String DatabaseName) at Microsoft.Samples.ReportingServices.CustomSecurity.AuthenticationUtilities.VerifyPassword(String suppliedUserName, String suppliedPassword) in C:Program FilesMicrosoft SQL Server90SamplesReporting ServicesExtension SamplesFormsAuthentication SamplecsFormsAuthenticationAuthenticationUtilities.cs:line 116 at Microsoft.Samples.ReportingServices.CustomSecurity.AuthenticationExtension.LogonUser(String userName, String password, String authority) in C:Program FilesMicrosoft SQL Server90SamplesReporting ServicesExtension SamplesFormsAuthentication SamplecsFormsAuthenticationAuthenticationExtension.cs:line 70 at Microsoft.ReportingServices.WebServer.RSCustomAuthentication.LogonUser(String userName, String password, String authority) at Microsoft.ReportingServices.WebServer.ReportingService2005Impl.LogonUser(String userName, String password, String authority) at Microsoft.ReportingServices.WebServer.ReportingService2005.LogonUser(String userName, String password, String authority) The action that failed was: LinkDemand The assembly or AppDomain that failed was: Membership.Data, Version=1.0.0.0, Culture=neutral, PublicKeyToken=<key>The method that caused the failure was: Microsoft.Practices.EnterpriseLibrary.Data.Database CreateDatabase(System.String) The Zone of the assembly that failed was: MyComputer The Url of the assembly that failed was: file:///c:/Program Files/Microsoft SQL Server/MSSQL.4/Reporting Services/ReportServer/bin/Membership.Data.DLL --- End of inner exception stack trace ---

Any ideas? I assume that Microsoft.Practices.EnterpriseLibrary.Data.dll is in GAC so i shouldn't have to worry about [AllowPartiallyTrustedCallers]

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Reporting Services :: Could Not Load File Or Assembly Error On Adding Custom Libraries In SSRS Reports

Sep 21, 2015

I have created a custom library(CodeLibrary) which internally references the dlls Microsoft.TeamFoundation.Client and Microsoft.TeamFoundation.WorkItemTracking.Client.

I added this custom Dll codelibrary.dll to my SSRS report. and the expression of one of the field as 

=codelibrary.codefunction.GetValue(1000)  
codefunction is the class and GetValue is the method.

When I preview the report, I get the error "Error while loading code module:

'CodeLibrary,Version=1.0.0.0,Culture=neutral,PublicKeyToken=null'. Could not load file or assembly 'CodeLibrary,Version1.0.0.0, Culture=neutral,PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified."

I am using VS2013, I have placed the custom library DLL in the path

C:Program FilesMicrosoft Visual Studio 12.0Common7IDEPrivateAssemblies

I have tested the custom library with a WPF application and it works fine.

I am not able to figure out what is causing this error.

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ALTER ASSEMBLY Error Msg 6509 An Error Occurred While Gathering Metadata From Assembly ‘&&<Assembly Name&&>’ With HRESULT 0x1.

Feb 22, 2008

I work with February CTP of SqlServer 2008.
I have an Assembly with several UDTs inside. Version of assembly is 1.0.*
I use CREATE ASSEMBLY statement to register this assembly, and it runs without any errors. Then I rebuild CLR solution without doing any changes in source code. In that case the only difference between new and old assemblies is version (difference in fourth part of version).
Then I try to update assembly in SqlServer. I use
ALTER ASSEMBLY <name>
FROM <path>
WITH PERMISSION_SET = UNSAFE, UNCHECKED DATA
statement for this. Statement runs with error:
Msg 6509An error occurred while gathering metadata from assembly €˜<Assembly name>€™ with HRESULT 0x1.
I found the list of condition for ALTER ASSEMBLY in MSDN:
ALTER ASSEMBLY statement cannot be used to change the following:
· The signatures of CLR functions, aggregate functions, stored procedures, and triggers in an instance of SQL Server that reference the assembly. ALTER ASSEMBLY fails when SQL Server cannot rebind .NET Framework database objects in SQL Server with the new version of the assembly.
· The signatures of methods in the assembly that are called from other assemblies.
· The list of assemblies that depend on the assembly, as referenced in the DependentList property of the assembly.
· The indexability of a method, unless there are no indexes or persisted computed columns depending on that method, either directly or indirectly.
· The FillRow method name attribute for CLR table-valued functions.
· The Accumulate and Terminate method signature for user-defined aggregates.
· System assemblies.
· Assembly ownership. Use ALTER AUTHORIZATION (Transact-SQL) instead.
Additionally, for assemblies that implement user-defined types, ALTER ASSEMBLY can be used for making only the following changes:
· Modifying public methods of the user-defined type class, as long as signatures or attributes are not changed.
· Adding new public methods.
· Modifying private methods in any way.

But I haven€™t done any changes in source code, so new version of assembly satisfies all this conditions.
What could be the reason for such behavior?
P.S. I€™ve got the same error, if I add or change any method in assembly before rebuilding.

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More Custom Security Questions

Jun 25, 2007

Still working on custom security
Since I can't get a name of file (path) from within CheckAccess method it becomes somewhat useless. Is there a way to maybe overload GetPermissions or Policies methods? Or maybe CreateReport method so that I can include some custom code there? Is there an example of something like that?

I wish the catalog tree was transparent to Authentication extension, I don't see a point in acl for a custom extension, all I want is names and I can build on top of that. Something along the lines -




Code Snippet

public bool CheckAccess(...file...)
{
string[] permissions ;
permissions = server.GetPermissions(file);
...
Maybe I am missing something simple and I can tie everything to a security descriptor but I don't see how I can if there is no information such as name, date, modified by name and so on. All we get is principal name which is not very useful since I don't use built-in security names.

Thanks

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