How to Get the Intermediate and Root Certificate from Existed Domain Valid Certificate?

Overview

If you only a domain valid certificate like the following figure. And you don't know where to get the intermediate and root certificate to make the full chain certificate. You can refer to this guide, here, we introduce a method.

Procedure

1 - Export the intermediate and root certificate from the existed Domain Valid Certificate.

Find the Certification Path from the by open the Domain Valid Certificate file, and click the tab "Certification Path".

You will see the top is the root cert, between root and domain valid cert is intermediate cert. The root and domain valid cert only exist 1 file. The intermediate can have 1, 2, 3 or more files which depends on the different cert provider.

 

2 - Export the intermediate cert.

Open the Domain Valid Certificate file, click the tab "Certification Path", choose the intermediate cert.

For example "R3" in the following figure:

Open the cert file, go to Details tab, click Copy to File

Choose "Base-64 encoded X.509(.CER)"

 

 

Finally, you will get the file.

 

3 - Repeat step 2 to get root cert file or other intermediate file.