Accessing a client certificate pfx file in Azure

Birna Rún Karlsdóttir 0

I am doing a web app that is deployed in Azure. I am trying to access a client certificate (a pfx file) that i can access when running on localhost but when running on azure it does not seem to be found. Do you have any tips for me on how I can access the file? With some google-ing I have set up a blob container in a storage account that my localhost can access but not through azure.

Greg Leonardo 85 Reputation points MVP

2023-05-09T12:07:37.85+00:00

General a local cert is a self signed dev cert and azure app services require a CA based cert that covers a custom domain. However, the cert is less important than the connection, you can’t use a localhost cert in azure as it will need to be looked up by the domains assigned. App services by default have a wildcard cert for *.azurewebsite.net.

Did you assign a custom domain? If yes, you can gen a cert with OpenSSL for that url to test, if not just use the default URL as it is already secure.
Birna Rún Karlsdóttir 0 Reputation points

2023-05-09T12:32:52.7533333+00:00

Okay I see. Thank you for the response.
So could the cert be just for use in localhost?
I am using a cert that I get from elsewhere that is a .pfx file. Will I need another certificate to use in Azure. Am I understanding you correctly?
Greg Leonardo 85 Reputation points MVP

2023-05-09T12:37:11.8066667+00:00

Yes, to cover the domain you are using. If you are using azurewebsite.net is already has a cert. Domains and certs go hand and hand. IDEs like VSCode and Visual Studio create a localhost dev cert for local dev secure testing.

Share via

Accessing a client certificate pfx file in Azure

Your answer