I'm trying to validate a XAdES signature with a SignatureTimeStamp-element (which is a base64-encoded block). The Java-Lib xades4j basically does the validation for me. However, I'd like to manually inspect the timestamp (especially when validation fails). With inspect I mean to show the contents like the used certificates, their validity, the timestamp, etc.
What tool can I use? Does openssl do the trick? Can you give me an example of how to use it?