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-rw-r--r--scripts/Dpkg/OpenPGP/Backend.pm127
1 files changed, 127 insertions, 0 deletions
diff --git a/scripts/Dpkg/OpenPGP/Backend.pm b/scripts/Dpkg/OpenPGP/Backend.pm
new file mode 100644
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+++ b/scripts/Dpkg/OpenPGP/Backend.pm
@@ -0,0 +1,127 @@
+# 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;