diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml new file mode 100644 index 0000000..8b5b6b7 --- /dev/null +++ b/.github/workflows/CI.yml @@ -0,0 +1,60 @@ +# This file is part of OPC-UA Log Fetcher. +# +# Copyright (C) 2023 Airbus CyberSecurity SAS +# +# OPC-UA Log Fetcher 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. +# +# OPC-UA Log Fetcher 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 +# OPC-UA Log Fetcher. If not, see . + +name: CI + +on: + push: + +jobs: + docker_build: + runs-on: ubuntu-latest + permissions: + contents: write + steps: + - name: Checkout + uses: actions/checkout@v4 + - name: Install poetry + run: pip install poetry + - name: Get version number + id: get-version + run: echo "version=$(poetry version -s)" >> $GITHUB_OUTPUT + - name: Build Wheel + run: poetry build -f wheel -o docker + - name: Build docker + uses: docker/build-push-action@v5 + with: + context: docker + build-args: MODULE_VERSION=${{ steps.get-version.outputs.version }} + tags: opc-ua-log-fetcher:${{ steps.get-version.outputs.version }} + load: true + - name: Save results + run: docker save opc-ua-log-fetcher:${{ steps.get-version.outputs.version }} | gzip > opc-ua-log-fetcher-${{ steps.get-version.outputs.version }}.docker.tar.gz + - name: Prepare release + run: zip opc-ua-log-fetcher-${{ steps.get-version.outputs.version }}.docker.zip COPYING LICENSE opc-ua-log-fetcher-${{ steps.get-version.outputs.version }}.docker.tar.gz + - name: Save as artifact + uses: actions/upload-artifact@v4 + with: + name: opc-ua-log-fetcher + path: opc-ua-log-fetcher-${{ steps.get-version.outputs.version }}.docker.zip + if-no-files-found: error + - name: Release + if: startsWith(github.ref, 'refs/tags/') + uses: softprops/action-gh-release@v1 + with: + files: opc-ua-log-fetcher-${{ steps.get-version.outputs.version }}.docker.zip + fail_on_unmatched_files: true diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..b229f88 --- /dev/null +++ b/.gitignore @@ -0,0 +1,5 @@ +venv/ +.idea +__pycache__/ +dist/ +.vscode/ diff --git a/CHANGELOG.md b/CHANGELOG.md new file mode 100644 index 0000000..a9959b3 --- /dev/null +++ b/CHANGELOG.md @@ -0,0 +1,10 @@ +# Changelog + +All notable changes to this project will be documented in this file. + +The format is loosely based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), +and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). + +## [1.0.0](https://source.cs-clab.net/cyber4de/opc-ua-module/-/tags/1.0.0) +## Features +* Initial Release diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/COPYING @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + 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 . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..7262050 --- /dev/null +++ b/LICENSE @@ -0,0 +1,16 @@ +OPC-UA Log Fetcher + +Copyright (C) 2023 Airbus CyberSecurity SAS + +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 . diff --git a/README.md b/README.md new file mode 100644 index 0000000..6485dc5 --- /dev/null +++ b/README.md @@ -0,0 +1,105 @@ +# OPC-UA Log Fetcher + +## License + +OPC-UA Log Fetcher + +Copyright (C) 2023 Airbus CyberSecurity SAS + +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 . + +### Third-party software usage + +This program uses the following software to run: + +| Software | Version | Copyright | License | +|-|-|-|-| +| opcua-asyncio (asyncua) | ^1.0.0 | 2023 FreeOpcUa | LGPL-3.0-or-later | +| rfc5424-logging-handler | ^1.4.3 | 2017 Joris Beckers | BSD-3-Clause | + + +## Command cheatsheet + +This project requires poetry (https://python-poetry.org/docs/#installing-with-the-official-installer). + +### Install dependencies +``` +poetry install +``` + +### Set the VERSION number variable +``` +VERSION=$(poetry version --short) && echo ${VERSION} +``` + +### Build + +Build the python package: +``` +poetry build +``` +The package will be in directory `dist`. +Then build the docker: +``` +docker build --file docker/Dockerfile --tag opc-ua-log-fetcher:${VERSION} . +``` + +#### Archive the docker image +``` +docker save opc-ua-log-fetcher:${VERSION} | gzip > opc-ua-log-fetcher-${VERSION}.docker.tar.gz +``` + +To import the image: +``` +docker load --input opc-ua-log-fetcher-${VERSION}.docker.tar.gz +``` + +### Execute +First start your server. + +To execute the fetcher: +``` +docker run --rm --network host --volume /dev/log:/dev/log opc-ua-log-fetcher:${VERSION} +``` + +To execute the script with poetry: +``` +poetry run opc-ua-listen +poetry run opc-ua-listen --help +``` + +#### Security + +1. no security at all + ``` + poetry run opc-ua-listen + ``` +2. username authentication, no security + ``` + poetry run opc-ua-listen --url opc.tcp://username@localhost:4840/freeopcua/server/ + ``` +3. no authentication/security-policy SignAndEncrypt + ``` + poetry run opc-ua-listen --private-key ./poc/certificates/peer-private-key-example-1.pem --certificate ./poc/certificates/peer-certificate-example-1.der --server-certificate ./poc/certificates/server-certificate-example.der + ``` +4. username authentication, certificates checks and encryption + ``` + poetry run opc-ua-listen --url opc.tcp://username@localhost:4840/freeopcua/server/ --private-key ./poc/certificates/peer-private-key-example-1.pem --certificate ./poc/certificates/peer-certificate-example-1.der --server-certificate ./poc/certificates/server-certificate-example.der + ``` + +### Publish a new version + +``` +git tag -s ${VERSION} -m "Release ${VERSION}" +git push origin --tags +``` diff --git a/docker/Dockerfile b/docker/Dockerfile new file mode 100644 index 0000000..94a3c42 --- /dev/null +++ b/docker/Dockerfile @@ -0,0 +1,26 @@ +# This file is part of OPC-UA Log Fetcher. +# +# Copyright (C) 2023 Airbus CyberSecurity SAS +# +# OPC-UA Log Fetcher is free software: you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by the Free +# Software Foundation, either version 3 of the License, or (at your option) any +# later version. +# +# OPC-UA Log Fetcher is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more +# details. +# +# You should have received a copy of the GNU General Public License along with +# OPC-UA Log Fetcher. If not, see . + +FROM python:3-alpine + +ARG MODULE_VERSION +COPY opc_ua_module-${MODULE_VERSION}-py3-none-any.whl opc_ua_module-${MODULE_VERSION}-py3-none-any.whl +RUN pip install opc_ua_module-${MODULE_VERSION}-py3-none-any.whl && rm opc_ua_module-${MODULE_VERSION}-py3-none-any.whl + +HEALTHCHECK CMD [ `netstat | grep ESTABLISHED | wc -l` -eq 2 ] + +ENTRYPOINT ["opc-ua-listen"] diff --git a/poetry.lock b/poetry.lock new file mode 100644 index 0000000..b38e80e --- /dev/null +++ b/poetry.lock @@ -0,0 +1,249 @@ +# This file is automatically @generated by Poetry 1.6.1 and should not be changed by hand. + +[[package]] +name = "aiofiles" +version = "23.2.1" +description = "File support for asyncio." +optional = false +python-versions = ">=3.7" +files = [ + {file = "aiofiles-23.2.1-py3-none-any.whl", hash = "sha256:19297512c647d4b27a2cf7c34caa7e405c0d60b5560618a29a9fe027b18b0107"}, + {file = "aiofiles-23.2.1.tar.gz", hash = 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Fetcher 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. +# +# OPC-UA Log Fetcher 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 +# OPC-UA Log Fetcher. If not, see . diff --git a/src/opc_ua_module/alarm_capture.py b/src/opc_ua_module/alarm_capture.py new file mode 100644 index 0000000..7fc61cd --- /dev/null +++ b/src/opc_ua_module/alarm_capture.py @@ -0,0 +1,78 @@ +# This file is part of OPC-UA Log Fetcher. +# +# Copyright (C) 2023 Airbus CyberSecurity SAS +# +# OPC-UA Log Fetcher 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. +# +# OPC-UA Log Fetcher 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 +# OPC-UA Log Fetcher. If not, see . + +import asyncio +import time +from asyncua import Client +from asyncua.ua import ObjectIds +from opc_ua_module.alarm_handler import AlarmHandler +from asyncua.crypto.security_policies import SecurityPolicyBasic256Sha256 + + +class AlarmCapture: + + def __init__(self, url, syslog_address, output_socket_tcp, certificate, private_key, server_certificate): + self._client = Client(url=url) + self._alarm_handler = AlarmHandler(syslog_address, url, output_socket_tcp) + self._certificate = certificate + self._private_key = private_key + self._server_certificate = server_certificate + + async def _set_security(self): + if not self._private_key: + return + if not self._certificate: + return + if not self._server_certificate: + return + await self._client.set_security( + SecurityPolicyBasic256Sha256, + self._certificate, + self._private_key, + server_certificate=self._server_certificate + ) + + async def _connect(self): + while True: + try: + await self._client.connect() + return + except OSError as e: + print(f'Connection to server failed with with exception: \'{e}\'') + wait_duration = 10 + print(f'Trying again in {wait_duration} seconds...') + time.sleep(wait_duration) + + async def _capture(self): + await self._set_security() + await self._connect() + try: + subscription = await self._client.create_subscription(1000, self._alarm_handler) + handle = await subscription.subscribe_alarms_and_conditions(self._client.nodes.server, + ObjectIds.AlarmConditionType) + + try: + while True: + await asyncio.sleep(100) + # note: the finally is necessary in case of Keyboard interrupt + finally: + await subscription.unsubscribe(handle) + finally: + await self._client.disconnect() + + def capture(self): + asyncio.run(self._capture()) diff --git a/src/opc_ua_module/alarm_handler.py b/src/opc_ua_module/alarm_handler.py new file mode 100644 index 0000000..7472ad8 --- /dev/null +++ b/src/opc_ua_module/alarm_handler.py @@ -0,0 +1,46 @@ +# This file is part of OPC-UA Log Fetcher. +# +# Copyright (C) 2023 Airbus CyberSecurity SAS +# +# OPC-UA Log Fetcher 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. +# +# OPC-UA Log Fetcher 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 +# OPC-UA Log Fetcher. If not, see . + +import logging +from rfc5424logging import LOG_LOCAL0, Rfc5424SysLogHandler, Rfc5424SysLogAdapter +import socket +from urllib.parse import urlparse + + +class AlarmHandler: + + def __init__(self, syslog_server_address, opc_server_url: str, output_socket_tcp): + logger = logging.getLogger('opc-ua-listen') + logger.setLevel(logging.INFO) + socket_type = socket.SOCK_DGRAM + self._opc_server_hostname = self._format_opc_server_hostname(opc_server_url) + if output_socket_tcp: + socket_type = socket.SOCK_STREAM + handler = Rfc5424SysLogHandler(address=syslog_server_address, socktype=socket_type, facility=LOG_LOCAL0, msg_as_utf8=False) + handler.append_nul = False + logger.addHandler(handler) + self._logger_adapter = Rfc5424SysLogAdapter(logger) + + def event_notification(self, event): + content = repr(event) + # append_nul and terminating \n are necessary for rsyslog to correctly interpret messages when they are sent over TCP + # see issue CYB-59 and https://docs.python.org/3/library/logging.handlers.html#logging.handlers.SysLogHandler.emit + self._logger_adapter.info(f'{content}', hostname=self._opc_server_hostname, appname='OPC-UA', procid='-', msgid="alarm_event") + + def _format_opc_server_hostname(self, opc_server_url: str) -> str: + parsed_url = urlparse(opc_server_url) + return parsed_url.hostname diff --git a/src/opc_ua_module/main.py b/src/opc_ua_module/main.py new file mode 100644 index 0000000..4cb52e7 --- /dev/null +++ b/src/opc_ua_module/main.py @@ -0,0 +1,62 @@ +# This file is part of OPC-UA Log Fetcher. +# +# Copyright (C) 2023 Airbus CyberSecurity SAS +# +# OPC-UA Log Fetcher 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. +# +# OPC-UA Log Fetcher 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 +# OPC-UA Log Fetcher. If not, see . + +from argparse import ArgumentParser +from opc_ua_module.alarm_capture import AlarmCapture +import sys + +_DEFAULT_SERVER_URL = 'opc.tcp://localhost:4840' +_DEFAULT_SYSLOG_ADDRESS = '/dev/log' + + +class Main: + + def __init__(self): + self._parser = ArgumentParser(description='Airbus OPC UA Alarm listener') + self._parser.add_argument('-u', '--url', default=_DEFAULT_SERVER_URL, + help=f'URL of the OPC UA server to connect to. Default to {_DEFAULT_SERVER_URL}') + self._parser.add_argument('-o', '--output', default=_DEFAULT_SYSLOG_ADDRESS, + help=f'Address of the syslog output. Either host:port, or a path. Default to {_DEFAULT_SYSLOG_ADDRESS}') + self._parser.add_argument('--tcp-output', action='store_true', help='Choose syslog socket to be tcp rather than defaut udp') + self._parser.add_argument('--private-key', help='Path to the private key (.pem)') + self._parser.add_argument('--certificate', help='Path to the certificate (.der)') + self._parser.add_argument('--server-certificate', help='Path to the server certificate (.der)') + + def _parse_syslog_output(self, output): + if ':' not in output: + return output + [host, port] = output.split(':', 1) + return (host, int(port)) + + def run(self, arguments): + try: + arguments = self._parser.parse_args(arguments[1:]) + syslog_address = self._parse_syslog_output(arguments.output) + client = AlarmCapture(arguments.url, syslog_address, arguments.tcp_output, + arguments.certificate, arguments.private_key, arguments.server_certificate) + client.capture() + except KeyboardInterrupt: + pass + # TODO error cases to handle + # ConnectionRefusedError here!!!!! when the server url is incorrect + # Value error on --output 'localhost:toto' + # OSError Bad file descriptor error on --output '/toto' + + +def run(): + main = Main() + main.run(sys.argv)