1. Go to sslforfree.com --> Enter you domain. For example: corporatematching.org
2. Press Create Free SSL Certificate
3. Press Manual Verification button in the next page as shown below:
4. Press Manually Verify Domain button.
5. After reading and implementing all the instructions, Press Download SSL Certificate.
6. Press Download All Certificate Files button in the next webpage as following:
7. After downloading the Certificate file, locate the zip file: sslforfree.zip and extract them.
8. Convert certificate.crt to X.509 public key certificate using following command:
openssl x509 -inform PEM -in certificate.crt > public.pem
9. Convert private.key to RSA key:
openssl rsa -in ./private.key -text > private.pem
10. Go to https://console.cloud.google.com/appengine/settings/certificates for you Google App Engine Project.
11. Navigate to SSL Certificate tab and press Upload a new certificate button as shown below:
12. Finally, place the file generated/converted in step#8 and step#9 in the first text area and second text area as shown below:
13. You may sometimes see the error: The private key you've selected does not appear to be valid. Make sure to
delete everything above the line: -----BEGIN RSA PRIVATE KEY----- and it will work.
Good Luck!
