Comments on: Determine if a Loaded .NET Assembly is Signed

By: Tof

Tof — Tue, 25 Nov 2008 13:33:06 +0000

Hi,
I am stepping in a bit late, but the signer name can be found in the Issuer property of the X509 certificate.
And the certificate has a ValidFrom and ValidTo properties. I’m not sure this is what you’re looking for as a timestamp.
Anyway, you can also retrieve an Assembly object from a file (wihtout using a type) with the Assembly.LoadFile() method.
Regards

By: MAEN

MAEN — Thu, 17 Apr 2008 14:20:33 +0000

but the its not my dll its ididnt write the class
i have a DLL on my machine
C:myDLL.dll
and i want to know if its signd
and if it was signed i want to know the
“signer name ” and the “time stamp”

i wrote this code and it works fine
but
the “cert ” has alot of data
in it but i cant find
“signer name ” and the “time stamp”

//====================================

public bool signed(string filename)
{
X509Certificate cert = null;

try
{
cert = X509Certificate.CreateFromSignedFile(filename);
}
catch (CryptographicException e)
{
return false;
}
return true;

}
//========================

sorry man for all these questions but i cant find any thing about “time stamp” and “signer name”

and thanx a lot

By: timm

timm — Thu, 17 Apr 2008 12:45:44 +0000

MyType is any type that’s defined in the assembly you are trying to check for digital signature.

So if your assembly has defined a Person class:

public class Person { … }

Then using the example in the article, you would access the assembly by:

Assembly asm = Assembly.GetAssembly( typeof( Person ) );

By: maen

maen — Thu, 17 Apr 2008 06:38:40 +0000

i want to get the path for the dll and then check if it has digital signature then get the signer name and the time stamp value,

bool sigend( string dll_path)
{

}

By: maen

maen — Thu, 17 Apr 2008 06:24:49 +0000

i dont know what does “typeof( MyType )” mean
could you plz give me an example
and thank you again

By: timm

timm — Wed, 16 Apr 2008 13:12:39 +0000

The C# code to determine if an assembly has a digital signature is in the article above.

By: MAEN

MAEN — Wed, 16 Apr 2008 05:53:00 +0000

thank you man sorry i didnot clarify my question i want to know how to do that programmatically
(ie get dll path and know if it has digital signature tab , rightclick–> properties–>digital signature)

By: timm

timm — Tue, 15 Apr 2008 13:26:18 +0000

In Visual Studio:
1. Select the project.
2. Click menu item “Project > Properties”.
3. Click the “Signing” tab.
4. If the “Sign the assembly” checkbox is checked, then the assembly has a digital signature.

By: maen

maen — Tue, 15 Apr 2008 07:28:54 +0000

how can i know if an assembly has a digital signature
tab in the properties i tried to use FileVersionInfo,