Determining if a pdf file has a digital signature in c without verifying the signature Ask Question. Asked 4 years, 1 month ago. Active 2 months ago. Viewed 2k times. Is there any way to check if a PDF file has a digital signature? Improve this question. Community Bot 1 1 1 silver badge. Hong Nguyen Hong Nguyen 3 3 silver badges 14 14 bronze badges.
What signature format do you use? With PDF you should go to the reserved bytes to the signature. For big files I would recommend to use a detached signature file — pedrofb. Indeed, the question is too broad at the moment. You could even have your own file format with a signature in a particular place. 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.
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. 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. SignCode for. Net 1. Net Framework managed interface. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Hi Nattawat, Thank you for posting on Microsoft Community. Method 1: To run the application without a valid digital signature follow the steps below: Right click on the program or file that you are unable to access and click on Properties. Click on Unblock and run the application to check if the issue is resolved.
Method 2: To unblock the files that do not have valid digital signature and to load them on the PC, follow the steps below: Open Internet Explorer and click on Tools options located at the top right corner of the web page. Select Internet options and click on Advanced tab. Locate Allow Software to run or install even if the signatures is invalid under Security category and check the box. Click on Apply and Ok to make changes.
Close the Internet Explorer and check if the changes are effective. Viewed 18k times. Start ; process. ReadToEnd ; return output. Improve this question. You may think that it's picky to worry about a few hundred milliseconds, but that adds up if you are checking thousands of files. The reason it's slow is probably not because you're verifying the signature, the reason it's slow is because you're spawning a new process for every file.
Get a digital signature library that is native to C , for example Bouncy Castle. Add a comment. Active Oldest Votes. ObjectModel; using System. Automation; using System. CreateRunspace runspaceConfiguration ; runspace. CreatePipeline ; pipeline. Invoke ; runspace. Improve this answer. Make sure to add the System. Automation reference to your project.
Works fine, even with PowerShell 3. If you want to do this for. Mike Zboray Mike Zboray
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