feature gpg

Feature: gpg

Feature adds GnuPG (The Universal Crypto Engine) and public keys to the image to verify image signatures.

https://www.gnupg.org/software/index.html

Parameters

• GPG_PUBKEYS -- List of files with public gpg keys.
• GPG_PROG -- The name of the gpg utility. This may be necessary if gpg is gpg-1.x and not gpg-2.x or higher.