GnuPG::UserAttribute - GnuPG User Attribute Objects

       No  useful information about the embedded attributes is provided yet.  It would be nice to be able to get
       ahold of the raw JPEG material.

       GnuPG::UserAttribute objects are generally not instantiated on their own, but rather as part of
       GnuPG::PublicKey or GnuPG::SecretKey objects.

       GnuPG::UserAttribute - GnuPG User Attribute Objects

       validity
           A scalar holding the value GnuPG reports for the calculated validity of the binding between this User
           Attribute packet and its associated primary key.  See GnuPG's DETAILS file for details.

       subpacket_count
           A  scalar  holding  the  number of attribute subpackets.  This is usually 1, as most UATs seen in the
           wild contain a single image in JPEG format.

       subpacket_total_size
           A scalar holding the total byte count of all attribute subpackets.

       signatures
           A list of GnuPG::Signature objects embodying the signatures on this user attribute.

       revocations
           A list of revocations associated with this User Attribute, stored as GnuPG::Signature objects  (since
           revocations are a type of certification as well).

       new( %initialization_args )
           This methods creates a new object.  The optional arguments are initialization of data members;

       GnuPG::Signature,

perl v5.40.1                                       2025-03-14                          GnuPG::UserAttribute(3pm)

         # assumes a GnuPG::PublicKey object in $publickey
         my $jpgs_size = $publickey->user_attributes->[0]->subpacket_total_size();