How to use a self signed certificate to publish messages on azure event grid namespace mqtt broker

Question

Hi,

I am trying to implement the the publish and subscribe functionality in a C# application, where I want to use a self signed certificate to authenticate the client, and then publish some data to the mqtt broker which can be received to all the subscribers.

To create the self signed certificate I used the openssl commands, which generated the root and intermediate certificates and the private key in pem format. I used the intermediate certificate to generate the thumbprint. the thumbprint is added in azure.

I am following this article - event-grid/mqtt-publish-and-subscribe-portal, instead of the MQTTX application I want to use a .NET app.

I am trying to create a c# application that can use the event grid namespace and the self signed certificates to authenticate and publish some dummy data.

Please provide some sample code that I can use to perform the publish operations. Or any article/documentation that can be helpful. Because the code that I am using is having lot of issues.

Thanks.

Answer 1

Hello @Satyam Chauhan,

welcome to this moderated Azure community forum.

I wrote a blog post where I used the Step CLI tool to generate the certificates.

There is a sample C# application in that blog post, based on the Microsoft Sample library.

An alternative C# application can be found in this blog post.

Can you first try this out?

If this is working, you can try out Open SSL.

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