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# 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/>.
=encoding utf8
=head1 NAME
Dpkg::OpenPGP::Backend::SOP - OpenPGP backend for SOP
=head1 DESCRIPTION
This module provides a class that implements the OpenPGP backend
for the Stateless OpenPGP Command-Line Interface, as described in
L<https://datatracker.ietf.org/doc/draft-dkg-openpgp-stateless-cli/>.
B<Note>: This is a private module, its API can change at any time.
=cut
package Dpkg::OpenPGP::Backend::SOP 0.01;
use v5.36;
use POSIX qw(:sys_wait_h);
use Dpkg::ErrorHandling;
use Dpkg::IPC;
use Dpkg::OpenPGP::ErrorCodes;
use parent qw(Dpkg::OpenPGP::Backend);
# - Once "hop" implements the new SOP draft, add as alternative.
# Ref: https://salsa.debian.org/clint/hopenpgp-tools/-/issues/4
# - Once the SOP MR !23 is finalized and merged, implement a way to select
# whether the SOP instance supports the expected draft.
# Ref: https://gitlab.com/dkg/openpgp-stateless-cli/-/merge_requests/23
# - Once the SOP issue #42 is resolved we can perhaps remove the alternative
# dependencies and commands to check?
# Ref: https://gitlab.com/dkg/openpgp-stateless-cli/-/issues/42
sub DEFAULT_CMDV {
return [ qw(sqopv rsopv sopv) ];
}
sub DEFAULT_CMD {
return [ qw(sqop rsop gosop pgpainless-cli) ];
}
sub _sop_exec
{
my ($self, %sop) = @_;
my $cmd;
if ($sop{verify}) {
$cmd = $self->{cmdv} || $self->{cmd};
} else {
$cmd = $self->{cmd};
}
return OPENPGP_MISSING_CMD unless $cmd;
$sop{out} //= '/dev/null';
my $stderr;
spawn(
exec => [ $cmd, @{$sop{args}} ],
wait_child => 1,
no_check => 1,
timeout => 10,
from_file => $sop{in},
to_file => $sop{out},
error_to_string => \$stderr,
);
if (WIFEXITED($?)) {
my $status = WEXITSTATUS($?);
print { *STDERR } "$stderr" if $status;
return $status;
} else {
subprocerr("$cmd @{$sop{args}}");
}
}
# XXX: We cannot use the SOP armor/dearmor interfaces, because concatenated
# ASCII Armor is not a well supported construct, and not all SOP
# implementations support. But we still need to handle this given the
# data we are managing. Remove these implementations for now and use
# the generic parent implementations. Once we can guarantee that our
# data has been sanitized, then we could switch back to use pure SOP
# interfaces.
sub inline_verify
{
my ($self, $inlinesigned, $data, @certs) = @_;
return OPENPGP_MISSING_KEYRINGS if @certs == 0;
return $self->_sop_exec(
args => [ 'inline-verify', @certs ],
verify => 1,
in => $inlinesigned,
out => $data,
);
}
sub verify
{
my ($self, $data, $sig, @certs) = @_;
return OPENPGP_MISSING_KEYRINGS if @certs == 0;
return $self->_sop_exec(
args => [ 'verify', $sig, @certs ],
verify => 1,
in => $data,
);
}
sub inline_sign
{
my ($self, $data, $inlinesigned, $key) = @_;
return OPENPGP_NEEDS_KEYSTORE if $key->needs_keystore();
return $self->_sop_exec(
args => [ qw(inline-sign --as clearsigned --), $key->handle ],
in => $data,
out => $inlinesigned,
);
}
=head1 CHANGES
=head2 Version 0.xx
This is a private module.
=cut
1;
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