| AdditiveExpr (‘+’ | ‘-’) MultiplicativeExpr | MultiplicativeExpr
| LocationPath | FilterExpr (‘/’ | ‘//’) RelativeLocationPath
For full_name, verifies the certificate chain is valid, the digests match the signatures signatures created by the signer depending on the policy settings.
If key is given it is used to validate the signing certificate.
A list of file names contained in this gem
Raises an exception if a security policy that verifies data is active. Old format gems cannot be verified as signed.
Is the tar entry empty?
Close the tar file