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# Signature.pm
# - providing an object-oriented approach to GnuPG key signatures
#
# Copyright (C) 2000 Frank J. Tobin <ftobin@cpan.org>
#
# This module is free software; you can redistribute it and/or modify it
# under the same terms as Perl itself.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# $Id: Signature.pm,v 1.4 2001/08/21 13:31:50 ftobin Exp $
#
package GnuPG::Signature;
use Moo;
use MooX::late;
has [qw(
validity
algo_num
hex_id
user_id_string
date
date_string
expiration_date
expiration_date_string
sig_class
is_exportable
)] => (
isa => 'Any',
is => 'rw',
);
sub is_valid {
my $self = shift;
return $self->validity eq '!';
}
sub compare {
my ($self, $other) = @_;
my @compared_fields = qw(
validity
algo_num
hex_id
date
date_string
sig_class
is_exportable
);
foreach my $field ( @compared_fields ) {
return 0 unless $self->$field eq $other->$field;
}
# check for expiration if present?
return 0 unless (defined $self->expiration_date) == (defined $other->expiration_date);
if (defined $self->expiration_date) {
return 0 unless (($self->expiration_date == $other->expiration_date) ||
($self->expiration_date_string eq $other->expiration_date_string));
}
return 1;
}
1;
__END__
=head1 NAME
GnuPG::Signature - GnuPG Key Signature Objects
=head1 SYNOPSIS
# assumes a GnuPG::Key or GnuPG::UserID or GnuPG::UserAttribute object in $signed
my $signing_id = $signed->signatures->[0]->hex_id();
=head1 DESCRIPTION
GnuPG::Signature objects are generally not instantiated
on their own, but rather as part of GnuPG::Key objects.
They embody various aspects of a GnuPG signature on a key.
=head1 OBJECT METHODS
=over 4
=item new( I<%initialization_args> )
This methods creates a new object. The optional arguments are
initialization of data members.
=item is_valid()
Returns 1 if GnuPG was able to cryptographically verify the signature,
otherwise 0.
=item compare( I<$other> )
Returns non-zero only when this Signature is identical to the other
GnuPG::Signature.
=back
=head1 OBJECT DATA MEMBERS
=over 4
=item validity
A character indicating the cryptographic validity of the key. GnuPG
uses at least the following characters: "!" means valid, "-" means not
valid, "?" means unknown (e.g. if the supposed signing key is not
present in the local keyring), and "%" means an error occurred (e.g. a
non-supported algorithm). See the documentation for --check-sigs in
gpg(1).
=item algo_num
The number of the algorithm used for the signature.
=item hex_id
The hex id of the signing key.
=item user_id_string
The first user id string on the key that made the signature.
This may not be defined if the signing key is not on the local keyring.
=item sig_class
Signature class. This is the numeric value of the class of signature.
A table of possible classes of signatures and their numeric types can
be found at http://tools.ietf.org/html/rfc4880#section-5.2.1
=item is_exportable
returns 0 for local-only signatures, non-zero for exportable
signatures.
=item date_string
The formatted date the signature was performed on.
=item date
The date the signature was performed, represented as the number of
seconds since midnight 1970-01-01 UTC.
=item expiration_date_string
The formatted date the signature will expire (signatures without
expiration return undef).
=item expiration_date
The date the signature will expire, represented as the number of
seconds since midnight 1970-01-01 UTC (signatures without expiration
return undef)
=back
=head1 SEE ALSO
=cut
|
