Export P7b file with all the certificate chain into CER file

Question

I have p7b file provided by Thwate.When I am trying to export the certificate in the cer file using the below command, the certificate chain is not included.
Please suggest

Answer 1

The only problem is that any additional certificates in resulted file will not be recognized, as tools don't expect more than one certificate per PEM/DER encoded file. Even openssl itself. Try

openssl x509 -outform DER -in certificate.cer | openssl x509 -inform DER -outform PEM

and see for yourself.