SDK/pluginCertificate.py

#!/usr/bin/env python3
#
# Copyright (C) 2023 Savoir-faire Linux Inc.
#
# Author: Xavier Jouslin de Noray <xavier.jouslindenoray@savoirfairelinux.com>
#
# 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 3 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 <http://www.gnu.org/licenses/>.
#
# Creates packaging targets for a distribution and architecture.
# This helps reduce the length of the top Makefile.
#
import os
import shutil
from OpenSSL import crypto
from typing import Dict
from zipfile import ZipFile
from msgpack import packb
from utils import read

from jplManipulation import JPLStructure
from certificate import Certificate


class PluginCertificate(Certificate):
    plugin: JPLStructure

    def __init__(self, key: crypto.PKey, cert: crypto.X509, plugin: JPLStructure, issuer_path: str = None):
        super().__init__(key, cert, issuer_path)
        self.plugin = plugin
        self.__temp_dir = './plugin/'

    @staticmethod
    def load(cert: Certificate, plugin_path: str) -> 'PluginCertificate':
        plugin = JPLStructure([plugin_path], is_merge=False)
        return PluginCertificate(cert.cert[0], cert.cert[1], plugin, cert.issuer_path)

    def sign(self) -> Dict[str, Dict[str, bytes]]:
        signatures = {}
        if not os.path.exists(self.__temp_dir):
            os.mkdir(self.__temp_dir)
        for path in self.plugin.paths:
            signatures[path] = {}
            with ZipFile(path, 'r') as zip_file:
                zip_file.extractall(self.__temp_dir)
            for root, _, files in os.walk(self.__temp_dir):
                for file in files:
                    if not root.endswith('/'):
                        root += '/'
                    abs_path = root + file
                    signatures[path][root.split(self.__temp_dir)[-1] + file] = super().sign(abs_path)[0]
        shutil.rmtree(self.__temp_dir)
        return signatures

    def save(self, path_2_file: str, signatures: Dict[str, Dict[str, bytes]]) -> None:
        for path  in self.plugin.paths:
            plugin_signatures = packb(signatures[path])
            with ZipFile(path, 'a') as file:
                file.writestr('signatures', plugin_signatures)
                file.writestr(
                                f'{self._cert.get_subject().CN}.crt',
                                crypto.dump_certificate(crypto.FILETYPE_PEM, self._cert) if self.issuer_path is None else read(f'{self.issuer_path}.crt', 'rb')
                            )
            with ZipFile(path, 'r') as zip_file:
                zip_file.extractall(self.__temp_dir)
            sign = super().sign(self.__temp_dir + 'signatures')
            with ZipFile(path, 'a') as file:
                file.writestr('signatures.sig', sign[0])
            shutil.copy(path, f'{path_2_file}.jpl')
        shutil.rmtree(self.__temp_dir)