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I am writing an assembly information application to be used in our software build process and am trying to read the digital signature information from a signed .Net assembly.
I want to do in my C# code what Windows Explorer can do by right-clicking a signed assembly and selecting the "Digital Signatures" tab and then clicking the Details button. e.g.
Has anyone got an idea how to do this programmatically in C#? I am currently using the Mono Cecil library to get the rest of the information from the assembly. Your help will be most appreciated.
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To detect whether the assembly file is signed or not, right click on the file and click the 'Properties' from the context menu. If you see a 'Digital Signatures' tab in the properties window, that means, the file is signed by a digital signature (as shown below).
Open the properties sheet for the . dll from Windows Explorer. If a tab "Digital Signatures" is shown, it's a signed assembly. If the tab is missing, it's unsigned.
When a signer electronically signs a document, the signature is created using the signer's private key, which is always securely kept by the signer. The mathematical algorithm acts as a cypher, creating data matching the signed document, called a hash, and encrypting that data.
The Mono project provides source code for both signcode and chktrust that you can re-use inside your own application (open source, MIT X11 licensed).
Both use Mono.Security.dll assembly (which works under Windows, not just Linux and OSX) and include a quite complete Authenticode support.
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