1 files changed, 123 insertions, 0 deletions
diff --git a/scripts/Dpkg/OpenPGP/Backend/Sequoia.pm b/scripts/Dpkg/OpenPGP/Backend/Sequoia.pm
new file mode 100644
index 0000000..5313393
--- /dev/null
+++ b/scripts/Dpkg/OpenPGP/Backend/Sequoia.pm
@@ -0,0 +1,123 @@
+# Copyright © 2021-2022 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::Sequoia;
+
+use strict;
+use warnings;
+
+our $VERSION = '0.01';
+
+use POSIX qw(:sys_wait_h);
+
+use Dpkg::ErrorHandling;
+use Dpkg::IPC;
+use Dpkg::OpenPGP::ErrorCodes;
+
+use parent qw(Dpkg::OpenPGP::Backend);
+
+sub DEFAULT_CMD {
+    return [ qw(sq) ];
+}
+
+sub _sq_exec
+{
+    my ($self, @exec) = @_;
+
+    my ($stdout, $stderr);
+    spawn(exec => [ $self->{cmd}, @exec ],
+          wait_child => 1, nocheck => 1, timeout => 10,
+          to_string => \$stdout, error_to_string => \$stderr);
+    if (WIFEXITED($?)) {
+        my $status = WEXITSTATUS($?);
+        print { *STDERR } "$stdout$stderr" if $status;
+        return $status;
+    } else {
+        subprocerr("$self->{cmd} @exec");
+    }
+}
+
+sub armor
+{
+    my ($self, $type, $in, $out) = @_;
+
+    return OPENPGP_MISSING_CMD unless $self->{cmd};
+
+    # We ignore the $type, and let "sq" handle this automatically.
+    my $rc = $self->_sq_exec(qw(armor --output), $out, $in);
+    return OPENPGP_BAD_DATA if $rc;
+    return OPENPGP_OK;
+}
+
+sub dearmor
+{
+    my ($self, $type, $in, $out) = @_;
+
+    return OPENPGP_MISSING_CMD unless $self->{cmd};
+
+    # We ignore the $type, and let "sq" handle this automatically.
+    my $rc = $self->_sq_exec(qw(dearmor --output), $out, $in);
+    return OPENPGP_BAD_DATA if $rc;
+    return OPENPGP_OK;
+}
+
+sub inline_verify
+{
+    my ($self, $inlinesigned, $data, @certs) = @_;
+
+    return OPENPGP_MISSING_CMD unless $self->{cmd};
+
+    my @opts;
+    push @opts, map { ('--signer-cert', $_) } @certs;
+    push @opts, '--output', $data if defined $data;
+
+    my $rc = $self->_sq_exec(qw(verify), @opts, $inlinesigned);
+    return OPENPGP_NO_SIG if $rc;
+    return OPENPGP_OK;
+}
+
+sub verify
+{
+    my ($self, $data, $sig, @certs) = @_;
+
+    return OPENPGP_MISSING_CMD unless $self->{cmd};
+
+    my @opts;
+    push @opts, map { ('--signer-cert', $_) } @certs;
+    push @opts, '--detached', $sig;
+
+    my $rc = $self->_sq_exec(qw(verify), @opts, $data);
+    return OPENPGP_NO_SIG if $rc;
+    return OPENPGP_OK;
+}
+
+sub inline_sign
+{
+    my ($self, $data, $inlinesigned, $key) = @_;
+
+    return OPENPGP_MISSING_CMD unless $self->{cmd};
+    return OPENPGP_NEEDS_KEYSTORE if $key->needs_keystore();
+
+    my @opts;
+    push @opts, '--cleartext-signature';
+    push @opts, '--signer-key', $key->handle;
+    push @opts, '--output', $inlinesigned;
+
+    my $rc = $self->_sq_exec('sign', @opts, $data);
+    return OPENPGP_KEY_CANNOT_SIGN if $rc;
+    return OPENPGP_OK;
+}
+
+1;