How to Export and Download Server Certificates from Google Chrome

To get the full chain (Root, CA, Server) in .cer format, you will need to download each certificate separately and then combine them if necessary.

Here’s how you can get each certificate:

Step 1: Get the Server Certificate

1. Open Chrome and Navigate to the Website: Go to https://smppcenter.com.
2. Click on the Padlock Icon: In the address bar, click on the padlock icon to the left of the URL.
3. View Certificate: Click on “Connection is secure” (or similar wording), then click on “Certificate” to open the certificate information.
4. Details Tab: In the Certificate window, go to the “Details” tab.
5. Copy to File: Click the “Copy to File…” button to open the Certificate Export Wizard.
6. Export the Certificate:
   • Click “Next.”
   • Choose “DER encoded binary .CER”.
   • Click “Next.”
   • Choose a location to save the file and provide a name for the server certificate file.
   • Click “Finish” to complete the export.

Step 2: Get the Intermediate CA Certificate

1. View Certificate Chain: In the same Certificate window, go to the “Certification Path” tab.
2. Select Intermediate CA: Select the intermediate CA certificate in the chain.
3. View Details: Click the “View Certificate” button to open the intermediate CA certificate details.
4. Export Intermediate CA Certificate:
   • Go to the “Details” tab.
   • Click “Copy to File…” to open the Certificate Export Wizard.
   • Follow the same steps as above to export the intermediate CA certificate.

Step 3: Get the Root Certificate

1. View Certificate Chain: In the “Certification Path” tab, select the root certificate.
2. View Details: Click the “View Certificate” button to open the root certificate details.
3. Export Root Certificate:
   • Go to the “Details” tab.
   • Click “Copy to File…” to open the Certificate Export Wizard.
   • Follow the same steps as above to export the root certificate.

Step 4: Combine Certificates (Optional)

If needed, you can combine the server, intermediate, and root certificates into a single file.

cat server.cer intermediate.cer root.cer > combined.cer

Summary

1. Server Certificate: Export using the detailed steps above.
2. Intermediate CA Certificate: Export from the “Certification Path” tab.
3. Root Certificate: Export from the “Certification Path” tab.
4. Combine Certificates (if needed) into a single .cer file using a text editor or command line.

By following these steps, you will have the full certificate chain (Root, CA, Server) in .cer format.