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# Copyright © 2017, 2022 Guillem Jover <guillem@debian.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# 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. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
package Dpkg::OpenPGP::Backend;
use strict;
use warnings;
our $VERSION = '0.01';
use List::Util qw(first);
use Dpkg::Path qw(find_command);
use Dpkg::OpenPGP::ErrorCodes;
sub DEFAULT_CMDV {
return [];
}
sub DEFAULT_CMDSTORE {
return [];
}
sub DEFAULT_CMD {
return [];
}
sub _detect_cmd {
my ($cmd, $default) = @_;
if (! defined $cmd || $cmd eq 'auto') {
return first { find_command($_) } @{$default};
} else {
return find_command($cmd);
}
}
sub new {
my ($this, %opts) = @_;
my $class = ref($this) || $this;
my $self = {
strict_verify => $opts{strict_verify} // 1,
};
bless $self, $class;
$self->{cmdv} = _detect_cmd($opts{cmdv}, $self->DEFAULT_CMDV());
$self->{cmdstore} = _detect_cmd($opts{cmdstore}, $self->DEFAULT_CMDSTORE());
$self->{cmd} = _detect_cmd($opts{cmd}, $self->DEFAULT_CMD());
return $self;
}
sub has_backend_cmd {
my $self = shift;
return defined $self->{cmd};
}
sub has_verify_cmd {
my $self = shift;
return defined $self->{cmd};
}
sub has_keystore {
my $self = shift;
return 0;
}
sub can_use_key {
my ($self, $key) = @_;
return $self->has_keystore() if $key->needs_keystore();
return 1;
}
sub get_trusted_keyrings {
my $self = shift;
return ();
}
sub armor {
my ($self, $type, $in, $out) = @_;
return OPENPGP_UNSUPPORTED_SUBCMD;
}
sub dearmor {
my ($self, $type, $in, $out) = @_;
return OPENPGP_UNSUPPORTED_SUBCMD;
}
sub inline_verify {
my ($self, $inlinesigned, $data, @certs) = @_;
return OPENPGP_UNSUPPORTED_SUBCMD;
}
sub verify {
my ($self, $data, $sig, @certs) = @_;
return OPENPGP_UNSUPPORTED_SUBCMD;
}
sub inline_sign {
my ($self, $data, $inlinesigned, $key) = @_;
return OPENPGP_UNSUPPORTED_SUBCMD;
}
1;
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