policyd-rate-limit-1.2.0/0000755000175000017500000000000014472611355015472 5ustar adezorziadezorzipolicyd-rate-limit-1.2.0/.coveragerc0000644000175000017500000000043514472611355017615 0ustar adezorziadezorzi[run] branch = True source = policyd_rate_limit policyd-rate-limit omit = policyd_rate_limit/tests/* [report] exclude_lines = pragma: no cover def __repr__ def __unicode__ def __str__ raise AssertionError raise NotImplementedError if six.PY3: policyd-rate-limit-1.2.0/.github/0000755000175000017500000000000014472611355017032 5ustar adezorziadezorzipolicyd-rate-limit-1.2.0/.github/workflows/0000755000175000017500000000000014472611355021067 5ustar adezorziadezorzipolicyd-rate-limit-1.2.0/.github/workflows/github-actions.yml0000644000175000017500000000333014472611355024531 0ustar adezorziadezorziname: policyd-rate-limit run-name: ${{ github.actor }} is running policyd-rate-limit CI tests on: [push] jobs: flake8: runs-on: ubuntu-latest container: image: python:bookworm steps: - uses: actions/checkout@v3 - run: pip install tox - run: apt-get update && apt-get install -y --no-install-recommends sudo - run: useradd --uid 1000 testuser && mkdir -p /home/testuser && chown testuser -R . /home/testuser - run: sudo -u testuser tox -e flake8 check_rst: runs-on: ubuntu-latest container: image: python:bookworm steps: - uses: actions/checkout@v3 - run: pip install tox - run: apt-get update && apt-get install -y --no-install-recommends sudo - run: useradd --uid 1000 testuser && mkdir -p /home/testuser && chown testuser -R . /home/testuser - run: sudo -u testuser tox -e check_rst tests: runs-on: ubuntu-latest container: image: python:bookworm steps: - uses: actions/checkout@v3 - run: pip install tox - run: apt-get update && apt-get install -y --no-install-recommends sudo - run: useradd --uid 1000 testuser && mkdir -p /home/testuser && chown testuser -R . /home/testuser - run: sudo -u testuser tox -e py3 coverage: runs-on: ubuntu-latest container: image: python:bookworm steps: - uses: actions/checkout@v3 - run: pip install tox - run: apt-get update && apt-get install -y --no-install-recommends sudo - run: useradd --uid 1000 testuser && mkdir -p /home/testuser && chown testuser -R . /home/testuser - run: sudo --preserve-env=COVERAGE_TOKEN -u testuser tox -e coverage env: COVERAGE_TOKEN: ${{ secrets.COVERAGE_TOKEN }} policyd-rate-limit-1.2.0/.gitignore0000644000175000017500000000014514472611355017462 0ustar adezorziadezorzi*.pyc *.egg-info *~ build/ dist/ test_venv .coverage .tox/ coverage.xml htmlcov/ tox_logs/ .cache/ policyd-rate-limit-1.2.0/.gitlab-ci.yml0000644000175000017500000000113714472611355020130 0ustar adezorziadezorzibefore_script: - pip install tox setuptools flake8: image: "python:3" cache: key: flake8 paths: - .tox/flake8 script: - tox -e flake8 check_rst: image: "python:3" cache: key: check_rst paths: - .tox/check_rst script: - tox -e check_rst py34: image: "python:3.4" cache: key: py34 paths: - .tox/py34 script: - tox -e py34 py35: image: "python:3.5" cache: key: py35 paths: - .tox/py35 script: - tox -e py35 coverage: image: "python:3" cache: key: coverage paths: - .tox/coverage script: - tox -e coverage policyd-rate-limit-1.2.0/.update_coverage0000755000175000017500000000231614472611355020635 0ustar adezorziadezorzi#!/bin/bash BASEDIR="$1" PROJECT_NAME="$2" TITLE="Coverage report of $PROJECT_NAME" # build by gitlab CI if [ -n "$CI_BUILD_REF_NAME" ]; then BRANCH="$CI_BUILD_REF_NAME" TITLE="$TITLE, $BRANCH branch" # build by travis elif [ -n "$TRAVIS_BRANCH" ]; then # if this a pull request ? if [[ "$TRAVIS_PULL_REQUEST" != "false" ]]; then BRANCH="pull-request-$TRAVIS_PULL_REQUEST" TITLE="$TITLE, pull request n°$BRANCH" else BRANCH="$TRAVIS_BRANCH" TITLE="$TITLE, $BRANCH branch" fi else BRANCH="$(git rev-parse --abbrev-ref HEAD)" TITLE="$TITLE, $BRANCH branch" fi if [[ "$BRANCH" = "HEAD" ]] || [ -z "$BRANCH" ]; then echo "bad branch name '$BRANCH', ignoring it" exit 0 fi VENV="$(mktemp -d)" HTMLREPORT="$(mktemp -d)" virtualenv "$VENV" "$VENV/bin/pip" install coverage "$VENV/bin/coverage" html --title "$TITLE" --directory "$HTMLREPORT" rm -rf "$VENV" cd "$HTMLREPORT"; tar czf "$BASEDIR/coverage.tar.gz" ./ cd "$BASEDIR" rm -rf "$HTMLREPORT" curl https://badges.genua.fr/coverage/ \ -F "secret=$COVERAGE_TOKEN" \ -F "tar=@$BASEDIR/coverage.tar.gz" \ -F "project=$PROJECT_NAME" \ -F "branch=$BRANCH" rm "$BASEDIR/coverage.tar.gz" policyd-rate-limit-1.2.0/LICENSE0000644000175000017500000010451414472611355016504 0ustar adezorziadezorzi GNU GENERAL PUBLIC LICENSE Version 3, 29 June 2007 Copyright (C) 2007 Free Software Foundation, Inc. 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But first, please read . policyd-rate-limit-1.2.0/MANIFEST.in0000644000175000017500000000040014472611355017222 0ustar adezorziadezorziinclude LICENSE include README.rst include Makefile include init/policyd-rate-limit.service include init/policyd-rate-limit include docs/policyd-rate-limit.8.rst include docs/policyd-rate-limit.yaml.5.rst include policyd_rate_limit/policyd-rate-limit.yaml policyd-rate-limit-1.2.0/Makefile0000644000175000017500000000473014472611355017136 0ustar adezorziadezorzi.PHONY: clean build install dist uninstall VERSION=`python3 setup.py -V` WHL_FILES := $(wildcard dist/*.whl) WHL_ASC := $(WHL_FILES:=.asc) DIST_FILE := $(wildcard dist/*.tar.gz) DIST_ASC := $(DIST_FILE:=.asc) build: python3 setup.py build install: dist pip3 -V [ ! -f /etc/policyd-rate-limit.yaml ] && cp -n policyd_rate_limit/policyd-rate-limit.yaml /etc/ || true cp -n init/policyd-rate-limit /etc/init.d cp -n init/policyd-rate-limit.service /etc/systemd/system/ || true cp -n init/policyd-rate-limit-clean.service /etc/systemd/system/policyd-rate-limit-clean.service cp -n init/policyd-rate-limit-clean.timer /etc/systemd/system/policyd-rate-limit-clean.timer pip3 install policyd-rate-limit --no-cache-dir -U --force-reinstall --no-deps --no-binary :all -f ./dist/policyd-rate-limit-${VERSION}.tar.gz systemctl daemon-reload systemctl enable policyd-rate-limit-clean.timer systemctl start policyd-rate-limit-clean.timer uninstall: pip3 uninstall policyd-rate-limit || true reinstall: uninstall install purge: uninstall rm -f /etc/policyd-rate-limit.conf /etc/policyd-rate-limit.yaml rm -f /etc/init.d/policyd-rate-limit /etc/systemd/system/policyd-rate-limit.service rm -f /etc/systemd/system/policyd-rate-limit-clean.service /etc/systemd/system/policyd-rate-limit-clean.timer rm -rf /var/lib/policyd-rate-limit/ clean_pyc: find ./ -name '*.pyc' -delete find ./ -name __pycache__ -delete clean_build: rm -rf build policyd_rate_limit.egg-info dist clean_coverage: rm -rf htmlcov .coverage coverage.xml clean_tox: rm -rf .tox tox_logs clean_test_venv: rm -rf test_venv clean: clean_pyc clean_build clean_coverage find ./ -name '*~' -delete clean_all: clean clean_tox clean_test_venv man_files: mkdir -p build/man/ rst2man docs/policyd-rate-limit.8.rst | sed 's/)(/(/g' > build/man/policyd-rate-limit.8 rst2man docs/policyd-rate-limit.yaml.5.rst | sed 's/)(/(/g' > build/man/policyd-rate-limit.yaml.5 dist: python3 setup.py sdist test_venv/bin/python: python3 -m venv test_venv test_venv/bin/pip3 install -U -r requirements-dev.txt test_venv: test_venv/bin/python coverage: clean_coverage test_venv export PATH=test_venv/bin/:$$PATH; echo $$PATH; pytest test_venv/bin/coverage html test_venv/bin/coverage report sign_release: $(WHL_ASC) $(DIST_ASC) dist/%.asc: gpg --detach-sign -a $(@:.asc=) test_venv/bin/twine: test_venv test_venv/bin/pip install twine publish_pypi_release: test_venv test_venv/bin/twine dist sign_release test_venv/bin/twine upload --sign dist/* policyd-rate-limit-1.2.0/README.rst0000644000175000017500000002214214472611355017162 0ustar adezorziadezorziPolicyd rate limit ================== |github_action| |coverage| |github_version| |pypi_version| |license| Postfix policyd server allowing to limit the number of mails accepted by postfix over several time periods, by sasl usernames and/or ip addresses. Installation ------------ First, create the user that will run the daemon:: adduser --system --group --home /run/policyd-rate-limit --no-create-home policyd-rate-limit Since version 0.6.0, the configuration file is written using the yaml, so you need the following package: * `pyyaml `_ (``sudo apt-get install python3-yaml`` on debian like systems) Depending of the backend storage you planning to use, you may need to install additional packages. (The default settings use the sqlite3 bakends and do not need extra packages). * `mysqldb `_ (``sudo apt-get install python3-mysqldb`` on debian like systems) for the mysql backend. * `psycopg2 `_ (``sudo apt-get install python3-psycopg2`` on debian like systems) fot the postgresql backend Install with pip:: sudo pip3 install policyd-rate-limit or from source code:: sudo make install This will install the ``policyd_rate_limit`` module, the ``policyd-rate-limit`` binary, copy the default config to ``/etc/policyd-rate-limit.conf`` if the file do not exists, copy an init script to ``/etc/init.d/policyd-rate-limit`` and an unit file to ``/etc/systemd/system/policyd-rate-limit.service``. After the installation, you may need to run ``sudo systemctl daemon-reload`` for make the unit file visible by systemd. You should run ``policyd-rate-limit --clean`` on a regular basis to delete old records from the database. It could be wise to put it in a daily cron, for example:: 0 0 * * * policyd-rate-limit /usr/local/bin/policyd-rate-limit --clean >/dev/null Options of the ``policyd-rate-limit`` binary -------------------------------------------- * ``-h``, ``--help``: show the help message and exit * ``--clean``: clean old records from the database * ``--get-config PARAMETER_NAME`` return the value of a config parameter * ``--file CONFIG_PATH``, ``-f CONFIG_PATH``: path to a config file Settings -------- If the option ``--file`` is not specified, ``policyd-rate-limit`` try to read its configuration from the following path and choose the first existing file: * ~/.config/policyd-rate-limit.conf * ~/.config/policyd-rate-limit.yaml * /etc/policyd-rate-limit.conf * /etc/policyd-rate-limit.yaml The ``.conf`` are the old configuration format. It was a python module and should not be used. The ``.yaml`` are the new configuration format using the YAML syntax. * ``debug``: make ``policyd-rate-limit`` output logs to stderr. The default is ``True``. * ``user``: The user ``policyd-rate-limit`` will use to drop privileges. The default is ``"policyd-rate-limit"``. * ``group``: The group ``policyd-rate-limit`` will use to drop privileges. The defaut is ``"policyd-rate-limit"``. * ``pidfile``: path where the program will try to write its pid to. The default is ``"/var/run/policyd-rate-limit/policyd-rate-limit.pid"``. ``policyd-rate-limit`` will try to create the parent directory and chown it if it do not exists. * ``mysql_config``: The config to connect to a mysql server * ``pgsql_config``: The config to connect to a postgresql server * ``sqlite_config``: The config to connect to a sqlite3 database. * ``backend``: Which data backend to use. Possible values are ``0`` for sqlite3, ``1`` for mysql and ``2`` for postgresql. The default is ``0``, use the sqlite3 backend. * ``SOCKET``: The socket to bind to. Can be a path to an unix socket or a couple [ip, port]. The default is ``"/var/spool/postfix/ratelimit/policy"``. ``policyd-rate-limit`` will try to create the parent directory and chown it if it do not exists. * ``socket_permission``: Permissions on the unix socket (if unix socket used). The default is ``0o666``. * ``limits``: A list of couple [number of emails, number of seconds]. If one of the element of the list is exeeded (more than 'number of emails' on 'number of seconds' for an ip address or an sasl username), postfix will return a temporary failure. * ``limits_by_id``: A dictionary of id -> limit list (see limits). Used to override limits and use custom limits for a particular id. Use an empty list for no limits for a particular id. Ids are sasl usernames or ip addresses. The default is ``{}``. * ``limit_by_sasl``: Apply limits by sasl usernames. The default is ``True``. * ``limit_by_sender``: Apply limits by sender addresses if sasl username is not found. The defaut is ``False``. * ``limit_by_ip``: Apply limits by ip addresses if sasl username and sender address are not found. The default is ``False``. * ``limited_networks``: A list of ip networks in cidr notation on which limits are applied. An empty list is equal to ``limit_by_ip = False``, put ``"0.0.0.0/0"`` and ``::/0`` for every ip addresses. * ``success_action``: If not limits are reach, which action postfix should do. The default is ``"dunno"``. See http://www.postfix.org/access.5.html for possible actions. * ``fail_action``: If a limit is reach, which action postfix should do. The default is ``"defer_if_permit Rate limit reach, retry later"``. * ``db_error_action`` : If we are unable to to contect the database backend, which action postfix should do. The default is ``"dunno"``. See http://www.postfix.org/access.5.html for possible actions. See http://www.postfix.org/access.5.html for possible actions. * ``config_file``: This parameter is automatically set to the path of the configuration file currently in use. You can call it conjunction with **--get-config** to known which configuration file is used. * ``report``: if ``True``, send a report to ``report_to`` about users reaching limits each time --clean is called. The default is ``False``. * ``report_from``: From who to send emails reports. It must be defined when ``report`` is ``True``. * ``report_to``: Address to send emails reports to. It must be defined when ``report`` is ``True``. It can be a single email address or a list of email adresses. * ``report_subject``: Subject of the report email. The default is ``"policyd-rate-limit report"``. * ``report_limits``: List of number of seconds from the limits list for which you want to be reported. The default is ``[86400]``. * ``report_only_if_needed``: Only send a report if some users have reach a reported limit. The default is ``True``. * ``smtp_server``: The smtp server to use to send emails ``["host", port]``. The default is ``["localhost", 25]``. * ``smtp_starttls``: Should we use starttls to send mails ? (you should set this to ``True`` if you use ``smtp_credentials``). The default is ``False``. * ``smtp_credentials``: Should we use credentials to connect to smtp_server ? if yes set ``["user", "password"]``, else ``null``. The default is ``null``. * ``count_mode``: How sent mail are counted * ``0``: each RCPT TO are counted individualy. This is the how it was done historically. If set to 0, the postfix check_policy_service must be set in smtpd_recipient_restrictions. This is deprecated and should not be used anymore * ``1``: recipient are counted in the DATA stage. The postfix parameter check_policy_service must be defined in smtpd_data_restrictions. This is the new default. * ``2``: Number of submited mails a counted, not recipients. The postfix parameter check_policy_service must be defined in smtpd_data_restrictions. This means that if a use send a single mail with 100 recipient, it's count for 1 in the quota instead of 100. Postfix settings ---------------- For postfix 3.0 and later I recommend using the example below. It ensure that if policyd-rate-limit become unavailable for any reason, postfix will ignore it and keep accepting mail as if the rule was not here. I find it nice has in my opinion, policyd-rate-limit is a "non-critical" policy service. /etc/postfix/main.cf:: smtpd_data_restrictions = ..., check_policy_service { unix:ratelimit/policy, default_action=DUNNO }, ... On previous postfix versions, you must use: /etc/postfix/main.cf:: smtpd_data_restrictions = ..., check_policy_service unix:ratelimit/policy, ... .. |github_action| image:: https://github.com/nitmir/policyd-rate-limit/actions/workflows/github-actions.yml/badge.svg?branch=master :target: https://github.com/nitmir/policyd-rate-limit/actions/workflows/github-actions.yml .. |coverage| image:: https://badges.genua.fr/coverage/badge/policyd-rate-limit/master.svg :target: https://badges.genua.fr/coverage/policyd-rate-limit/ .. |pypi_version| image:: https://badges.genua.fr/pypi/v/policyd-rate-limit.svg :target: https://pypi.python.org/pypi/policyd-rate-limit .. |github_version| image:: https://badges.genua.fr/github/tag/nitmir/policyd-rate-limit.svg?label=github :target: https://github.com/nitmir/policyd-rate-limit/releases/latest .. |license| image:: https://badges.genua.fr/pypi/l/policyd-rate-limit.svg :target: https://www.gnu.org/licenses/gpl-3.0.html policyd-rate-limit-1.2.0/docs/0000755000175000017500000000000014472611355016422 5ustar adezorziadezorzipolicyd-rate-limit-1.2.0/docs/policyd-rate-limit.8.rst0000644000175000017500000000642014472611355023034 0ustar adezorziadezorzi================== policyd-rate-limit ================== ------------------------------- rate limiter SMTP policy daemon ------------------------------- :Author: Valentin Samir :Date: 2016-08-04 :Copyright: GPL-3 :Version: 3.8 :title_upper: policyd-rate-limit :Manual section: 8 :Manual group: policyd-rate-limit Synopsis ======== **policyd-rate-limit** [**-h**] [**--clean**] [**--get-config** *configname*] [**--file** *configpath*] Description =========== **policyd-rate-limit**)(8) is a SMTP policy daemon written in **python3**)(1) for **postfix**)(1). It keep track of the number of mails sent by sasl usernames and/or ip addresses over time sliding window. A configurable action (see **access**)(5)) is done then a user and/or ip address exceeds one or more configurable limits. Setup ===== For example, for postfix 3.0 and later, you can set in postfix **/etc/postfix/main.cf** configuration file:: smtpd_data_restrictions = ..., check_policy_service { unix:ratelimit/policy, default_action=DUNNO }, ... Postfix will ask policyd-rate-limit what to do on mail reception (success or fail action) and will accept mail if policyd-rate-limit become unavailable. On previous postfix versions, you must use:: smtpd_data_restrictions = ..., check_policy_service unix:ratelimit/policy, ... Options ======= **-h**, **--help** show this help message and exit **--clean** clean old records from the database **--get-config** *configname* return the value of the *configname* configuration parameter. You can get a value in a dictionary by using a dotted notation. For instance, for getting the key KEY in the dictionary DICT, you should use DICT.KEY for *configname*. You can call the configuration parameter *config_file* to known which configuration file is used. **-f**, **--file** path to a policyd-rate-limit configuration file Logging ======= Logging is output to stderr and redirected to **syslog**)(3) by systemd. Logs are produced only if the **debug** configuration parameter is set to True. Configuration ============= If the option **--file** is not specified, **policyd-rate-limit**)(8) try to read its configuration from the following path and choose the first existing file:: ~/.config/policyd-rate-limit.conf ~/.config/policyd-rate-limit.yaml /etc/policyd-rate-limit.conf /etc/policyd-rate-limit.yaml The .conf are the old configuration format. It was a python module and should not be used. The .yaml are the new configuration format using the YAML syntax. See YAML(3pm) for an overview of the format. See **policyd-rate-limit.yaml**)(5) for possible settings. Exit values =========== **0** Normal exit. **1** Only return then the option **--get-config** is used. Configuration parameter not found. **2** User or group set in the configuration file do not exists. **3** Another instance is already running **4** The configuration parameter SOCKET is malformed **5** Configuration file not found **6** Some error was raised during runtime **8** Error during cleaning See also ======== | **policyd-rate-limit.yaml**)(5): policyd-rate-limit configuration file | **master**)(5), Postfix master.cf file syntax | **access**)(5), Postfix SMTP access control table policyd-rate-limit-1.2.0/docs/policyd-rate-limit.yaml.5.rst0000644000175000017500000001342014472611355023770 0ustar adezorziadezorzi======================= policyd-rate-limit.yaml ======================= ------------------------------------------- policyd-rate-limit configuration parameters ------------------------------------------- :Author: Valentin Samir :Date: 2016-08-04 :Copyright: GPL-3 :Version: 3.8 :title_upper: policyd-rate-limit.yaml :Manual section: 5 :Manual group: policyd-rate-limit Description =========== **policyd-rate-limit**)(8) was using a **python**)(1) style configuration file and not use a **yaml**)(3pm) file which is reads on startup. .conf files are the old python format confguration files and .yaml the new ones. Old style configuration files are deprecated and should not be used. If the **--file** option if not set, it searches for configuration files on the following paths:: ~/.config/policyd-rate-limit.conf ~/.config/policyd-rate-limit.yaml /etc/policyd-rate-limit.conf /etc/policyd-rate-limit.yaml and exits if not found. Settings ======== **debug** Make policyd-rate-limit output logs to stderr. The default is True. **user** The user policyd-rate-limit will use to drop privileges. The default is "policyd-rate-limit". **group** The group policyd-rate-limit will use to drop privileges. The default is "policyd-rate-limit". **pidfile** path where the program will try to write its pid to. The default is "/var/run/policyd-rate-limit/policyd-rate-limit.pid". policyd-rate-limit will try to create the parent directory and chown it if it do not exists. **mysql_config** The configuration to connect to a mysql server. It should be a dictionary of parameters to give to the MySQLdb.connect function. See the python3-mysqldb documentations. **pgsql_config** The configuration to connect to a postgresql server. It should be a dictionary of parameters to give to the psycopg2.connect function. See the python3-psycopg2 documentations. **sqlite_config** The configuration to connect to a sqlite3 database. It should be a dictionary of parameters to give to the sqlite3.connect function. See the python3 documentations. **backend** Which data backend to use. Possible values are 0 for sqlite3, 1 for mysql and 2 for postgresql. The default is 0, use the sqlite3 backend. **SOCKET** The socket to bind to. Can be a path to an unix socket or a couple [ip, port]. The default is "/var/spool/postfix/ratelimit/policy". policyd-rate-limit will try to create the parent directory and chown it if it do not exists. **socket_permission** Permissions on the unix socket (if unix socket used). The default is 0o666. **limits** A list of couple [number of emails, number of seconds]. If one of the element of the list is exceeded (more than 'number of emails' on 'number of seconds' for an ip address or an sasl username), postfix will return a temporary failure. **limits_by_id** A dictionary of id -> limit list (see limits). Used to override limits and use custom limits for a particular id. Use an empty list for no limits for a particular id. Ids are sasl usernames or ip addresses. The default is {}. **limit_by_sasl** Apply limits by sasl usernames. The default is True. **limit_by_sender** Apply limits by sender addresses if sasl username is not found. The defaut is ``False``. **limit_by_ip** Apply limits by ip addresses if sasl username is not found. The default is False. **limited_networks** A list of ip networks in cidr notation on which limits are applied. An empty list is equal to limit_by_ip = False, put "0.0.0.0/0" and ::/0 for every ip addresses. **success_action** If no limits are reach, which action postfix should do. The default is "dunno". See **access**)(5) for possible actions. **fail_action** If a limit is reach, which action postfix should do. The default is "defer_if_permit Rate limit reach, retry later". See **access**)(5) for possible actions. **db_error_action** If we are unable to to contect the database backend, which action postfix should do. The default is "dunno". See **access**)(5) for possible actions. **config_file** This parameter is automatically set to the path of the configuration file currently in use. You can call it in conjunction with **--get-config** to known which configuration file is used. **report** if True, send a report to **report_to** about users reaching limits each time --clean is called. The default is False. **report_from** From who to send emails reports. It must be defined when **report** is True. **report_to** Address to send emails reports to. It must be defined when **report** is True. It can be a single email address or a list of email adresses. **report_subject** Subject of the report email. The default is "policyd-rate-limit report". **report_limits** List of number of seconds from the limits list for which you want to be reported. The default is [86400]. **report_only_if_needed** Only send a report if some users have reach a reported limit. The default is True. **smtp_server** The smtp server to use to send emails ["host", port]. The default is ["localhost", 25]. **smtp_starttls** Should we use starttls to send mails ? (you should set this to True if you use **smtp_credentials**). The default is False. **smtp_credentials** Should we use credentials to connect to smtp_server ? if yes set ["user", "password"], else null. The default is null. **count_mode** How sent mail are counted. Set to **0**, each RCPT TO are counted individualy. This is the how it was done historically. If set to 0, the postfix check_policy_service must be set in smtpd_recipient_restrictions. This is deprecated and should not be used anymore. Set to **1** recipient are counted in the DATA stage. The postfix parameter check_policy_service must be defined in smtpd_data_restrictions. This is the new default. See also ======== | **policyd-rate-limit**)(8) policyd-rate-limit-1.2.0/init/0000755000175000017500000000000014472611355016435 5ustar adezorziadezorzipolicyd-rate-limit-1.2.0/init/policyd-rate-limit0000755000175000017500000000344414472611355022100 0ustar adezorziadezorzi#!/bin/sh ### BEGIN INIT INFO # Provides: policyd-rate-limit # Required-Start: $remote_fs $network $syslog # Required-Stop: $remote_fs $network $syslog # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: Postfix policyd rate limiter ### END INIT INFO # This program is distributed in the hope that it will be useful, but WITHOUT # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS # FOR A PARTICULAR PURPOSE. See the GNU General Public License version 3 for # more details. # # You should have received a copy of the GNU General Public License version 3 # along with this program; if not, write to the Free Software Foundation, Inc., 51 # Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. # # (c) 2015 Valentin Samir DAEMON="/usr/local/bin/policyd-rate-limit" NAME="policyd-rate-limit" DESC="Postfix policyd rate limiter" PID="$($DAEMON --get-config pidfile)" [ -x $DAEMON ] || exit 0 . /lib/lsb/init-functions stoped(){ if [ -f $PID ]; then pid=`cat $PID` if ps -p $pid >/dev/null; then return 1 fi fi return 0 } start(){ if stoped; then log_daemon_msg "Starting $DESC" "$NAME" /sbin/start-stop-daemon --start --pidfile $PID -b --exec $DAEMON log_end_msg $? else log_action_msg "Already running: $NAME" fi } stop(){ if stoped; then log_action_msg "Not running: $NAME" else log_daemon_msg "Stopping $DESC" "$NAME" /sbin/start-stop-daemon --stop --pidfile $PID --retry 30 log_end_msg $? fi } status(){ status_of_proc -p "$PID" "$DAEMON" "$NAME" } case $1 in start) start ;; stop) stop ;; restart) stop && start ;; force-reload) stop && start ;; status) status ;; *) echo "Usage: $0 {start|stop|restart|force-reload|status}" >&2 exit 1 ;; esac exit $? policyd-rate-limit-1.2.0/init/policyd-rate-limit-clean.service0000644000175000017500000000040414472611355024605 0ustar adezorziadezorzi[Unit] Description=Postfix policyd rate limiter - clean database After=syslog.target [Service] Type=oneshot ExecStart=/usr/local/bin/policyd-rate-limit --clean KillSignal=SIGINT StandardOutput=syslog StandardError=syslog [Install] WantedBy=multi-user.target policyd-rate-limit-1.2.0/init/policyd-rate-limit-clean.timer0000644000175000017500000000020714472611355024266 0ustar adezorziadezorzi[Unit] Description=Clean policyd rate limit database daily [Timer] OnCalendar=daily Persistent=true [Install] WantedBy=timers.target policyd-rate-limit-1.2.0/init/policyd-rate-limit.service0000644000175000017500000000035214472611355023527 0ustar adezorziadezorzi[Unit] Description=Postfix policyd rate limiter After=syslog.target [Service] Type=simple ExecStart=/usr/local/bin/policyd-rate-limit KillSignal=SIGINT StandardOutput=syslog StandardError=syslog [Install] WantedBy=multi-user.target policyd-rate-limit-1.2.0/policyd-rate-limit0000755000175000017500000001262114472611355021132 0ustar adezorziadezorzi#!/usr/bin/env python3 # -*- coding: utf-8 -*- # 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 version 3 for # more details. # # You should have received a copy of the GNU General Public License version 3 # along with this program; if not, write to the Free Software Foundation, Inc., 51 # Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. # # (c) 2015-2016 Valentin Samir import os import sys import argparse import signal from policyd_rate_limit.policyd import Policyd from policyd_rate_limit import utils from policyd_rate_limit.utils import config if __name__ == "__main__": # pragma: no branch parser = argparse.ArgumentParser() parser.add_argument("--clean", help="clean old records from the database", action="store_true") parser.add_argument( "--get-config", help="return the value of a config parameter", metavar='PARAMETER_NAME' ) parser.add_argument("--file", '-f', help="path to a config file", metavar='CONFIG_PATH') args = parser.parse_args() try: if args.file: config.setup(args.file) else: config.setup() except ValueError as error: sys.stderr.write("%s\n" % error) sys.exit(5) # if policyd-rate-limit was lauch by root, try creating piddir, socket dir and if used # sqlite3 database dir then, drop privileges if os.getuid() == 0: try: utils.make_directories() utils.drop_privileges() # if user/group from config do not exists, a ValueError is raised and we exit. except ValueError as error: sys.stderr.write("%s\n" % error) # continue running if asking for the value of a config param if not args.get_config: sys.exit(2) # ask for the value of a config param, print it and exit if args.get_config: try: sys.stdout.write(str(utils.get_config(args.get_config))) except (AttributeError): sys.stderr.write("%s not found\n" % args.get_config) sys.exit(1) # else we gonna need the database so we initialize it else: # do not lauch the daemon if no config file is found if not config.config_file: sys.exit(5) # we try to initialize the database. try: utils.database_init() # If initialization fail, lauch policyd-rate-limit anyway, we will try to initialize it # later, the database is maybe just not available right now. except Exception as error: sys.stderr.write("Fail to initialize database: %s\n" % error) # if database cleaning requested, remove old records and exit if args.clean: try: utils.clean() except ValueError as error: sys.stderr.write("%s\n" % error) sys.exit(8) # else we gonna lauch the policyd daemon else: # we check if policyd-rate-limit is not already running by lookig at config.pidfile try: # read the pid from pidfile (on clean exit policyd-rate-limit remote its pid file # so if it exists either policyd-rate-limit is already running or has crashed) if os.path.isfile(config.pidfile): with open(config.pidfile) as f: pid = int(f.read().strip()) try: # should raise OSError(3) if not process found and success if found os.kill(pid, 0) # no exception raised so the pid in pidfile is still running, we display a # error message and exit. sys.stderr.write( ( "policyd-rate-limit seems to be already running according to " "the pid in the file %s. Exiting.\n" ) % config.pidfile ) sys.exit(3) except OSError as error: # No such process if error.errno != 3: # pragma: no cover (should not happen) raise # unable to read the pid from pidfile, so we continue except (ValueError, OSError): pass try: # we try to write our pid. On failure a ValueError is raised utils.write_pidfile() try: p = Policyd() try: p.socket() except (ValueError, OSError) as error: sys.stderr.write("%s\n" % error) sys.exit(4) try: # exit upon SIGUSR1 reception. Used for coverage computation signal.signal(signal.SIGUSR1, utils.exit_signal_handler) p.run() except (KeyboardInterrupt, utils.Exit): pass finally: p.close_socket() finally: utils.remove_pidfile() except Exception as error: sys.stderr.write("%s\n" % error) sys.exit(6) policyd-rate-limit-1.2.0/policyd_rate_limit/0000755000175000017500000000000014472611355021346 5ustar adezorziadezorzipolicyd-rate-limit-1.2.0/policyd_rate_limit/__init__.py0000644000175000017500000000076514472611355023467 0ustar adezorziadezorzi# 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 version 3 for # more details. # # You should have received a copy of the GNU General Public License version 3 # along with this program; if not, write to the Free Software Foundation, Inc., 51 # Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. # # (c) 2015 Valentin Samir policyd-rate-limit-1.2.0/policyd_rate_limit/config.py0000644000175000017500000000553614472611355023176 0ustar adezorziadezorzi# 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 version 3 for # more details. # # You should have received a copy of the GNU General Public License version 3 # along with this program; if not, write to the Free Software Foundation, Inc., 51 # Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. # # (c) 2015-2016 Valentin Samir from policyd_rate_limit.const import SQLITE_DB, MYSQL_DB, PGSQL_DB # noqa: F401 debug = True user = "policyd-rate-limit" group = "policyd-rate-limit" pidfile = "/var/run/policyd-rate-limit/policyd-rate-limit.pid" mysql_config = { "user": "username", "passwd": "*****", "db": "database", "host": "localhost", "charset": 'utf8', } sqlite_config = { "database": "/var/lib/policyd-rate-limit/db.sqlite3", } pgsql_config = { "database": "database", "user": "username", "password": "*****", "host": "localhost", } backend = SQLITE_DB # SOCKET=("127.0.0.1", 8552) SOCKET = "/var/spool/postfix/ratelimit/policy" socket_permission = 0o666 # list of (number of mails, number of seconds) limits = [ (10, 60), # limit to 10 mails by minutes (150, 86400), # limits to 150 mails by days ] # dict of id -> limit list. Used to override limits and use custom limits for # a particular id. Use an empty list for no limits for a particular id. # ids are sasl usernames or ip addresses limits_by_id = {} limit_by_sasl = True limit_by_sender = False limit_by_ip = False limited_networks = [] # actions return to postfix, see http://www.postfix.org/access.5.html for a list of actions. success_action = "dunno" fail_action = "defer_if_permit Rate limit reach, retry later" # action to return to postfix when we are unable to contect the database backend db_error_action = "dunno" # if True, send a report to report_email about users reaching limits each time --clean is called report = False # from who to send emails reports report_from = None # address to send emails reports to. It can be a single email or a list of emails report_to = None # subject of the report email report_subject = "policyd-rate-limit report" # add number of seconds from the limits list for which you want to be reported report_limits = [86400] # only send a report if some users have reach a reported limit report_only_if_needed = True # The smtp server to use to send emails (host, port) smtp_server = ("localhost", 25) # Should we use starttls (you should set this to True if you use smtp_credentials) smtp_starttls = False # Should we use credentials to connect to smtp_server ? if yes set ("user", "password"), else None smtp_credentials = None # The time in seconds before an unused socket gets closed delay_to_close = 300 # count mode. 0 for RCPT, 1 for DATA count_mode = 0 policyd-rate-limit-1.2.0/policyd_rate_limit/const.py0000644000175000017500000000103514472611355023045 0ustar adezorziadezorzi# 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 version 3 for # more details. # # You should have received a copy of the GNU General Public License version 3 # along with this program; if not, write to the Free Software Foundation, Inc., 51 # Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. # # (c) 2015 Valentin Samir SQLITE_DB = 0 MYSQL_DB = 1 PGSQL_DB = 2 policyd-rate-limit-1.2.0/policyd_rate_limit/policyd-rate-limit.conf0000644000175000017500000000427214472611355025732 0ustar adezorziadezorzifrom policyd_rate_limit.const import SQLITE_DB, MYSQL_DB, PGSQL_DB debug = False user = "policyd-rate-limit" group = "policyd-rate-limit" pidfile = "/var/run/policyd-rate-limit/policyd-rate-limit.pid" mysql_config = { "user": "username", "passwd": "*****", "db": "database", "host": "localhost", "charset": 'utf8', } sqlite_config = { "database": "/var/lib/policyd-rate-limit/db.sqlite3", } pgsql_config = { "database": "database", "user": "username", "password": "*****", "host": "localhost", } backend = SQLITE_DB # SOCKET=("127.0.0.1", 8552) SOCKET = "/var/spool/postfix/ratelimit/policy" socket_permission = 0o666 # list of (number of mails, number of seconds) limits = [ (10, 60), # limit to 10 mails by minutes (150, 86400), # limits to 150 mails by days ] # dict of id -> limit list. Used to override limits and use custom limits for # a particular id. Use an empty list for no limits for a particular id. # ids are sasl usernames or ip addresses limits_by_id = {} limit_by_sasl = True limit_by_ip = False limited_networks = [] # actions return to postfix, see http://www.postfix.org/access.5.html for a list of actions. success_action = "dunno" fail_action = "defer_if_permit Rate limit reach, retry later" # action to return to postfix when we are unable to contect the database backend db_error_action = "dunno" # if True, send a report to report_email about users reaching limits each time --clean is called report = False # from who to send emails reports report_from = None # address to send emails reports to. It can be a single email or a list of emails report_to = None # subject of the report email report_subject = "policyd-rate-limit report" # add number of seconds from the limits list for which you want to be reported report_limits = [86400] # only send a report if some users have reach a reported limit report_only_if_needed = True # The smtp server to use to send emails (host, port) smtp_server = ("localhost", 25) # Should we use starttls (you should set this to True if you use smtp_credentials) smtp_starttls = False # Should we use credentials to connect to smtp_server ? if yes set ("user", "password"), else None smtp_credentials = None policyd-rate-limit-1.2.0/policyd_rate_limit/policyd-rate-limit.yaml0000644000175000017500000001134714472611355025750 0ustar adezorziadezorzi# Make policyd-rate-limit output logs to stderr debug: True # The user policyd-rate-limit will use to drop privileges. user: "policyd-rate-limit" # The group policyd-rate-limit will use to drop privileges. group: "policyd-rate-limit" # path where the program will try to write its pid to. pidfile: "/var/run/policyd-rate-limit/policyd-rate-limit.pid" # The config to connect to a mysql server. mysql_config: user: "username" passwd: "*****" db: "database" host: "localhost" charset: 'utf8' # The config to connect to a sqlite3 database. sqlite_config: database: "/var/lib/policyd-rate-limit/db.sqlite3" # The config to connect to a postgresql server. pgsql_config: database: "database" user: "username" password: "*****" host: "localhost" # Which data backend to use. Possible values are 0 for sqlite3, 1 for mysql and 2 for postgresql. backend: 0 # The socket to bind to. Can be a path to an unix socket or a couple [ip, port]. # SOCKET: ["127.0.0.1", 8552] SOCKET: "/var/spool/postfix/ratelimit/policy" # Permissions on the unix socket (if unix socket used). socket_permission: 0666 # A list of couple [number of emails, number of seconds]. If one of the element of the list is # exeeded (more than 'number of emails' on 'number of seconds' for an ip address or an sasl # username), postfix will return a temporary failure. limits: - [10, 60] # limit to 10 mails by minutes - [150, 86400] # limits to 150 mails by days # dict of id -> limit list. Used to override limits and use custom limits for # a particular id. Use an empty list for no limits for a particular id. # ids are sasl usernames or ip addresses # limits_by_id: # foo: [] # 192.168.0.254: # - [1000, 86400] # limits to 1000 mails by days # 2a01:240:fe3d:4:219:bbff:fe3c:4f76: [] limits_by_id: {} # Use custom rate limit for every user, if you have sql backend for your mail server. # There is a `rate_limit` table which has id -> limits_by_id-like strings for custom limits. # You should set for your users a rate_limit id to map users <-> rate_limits tables. # sql_limits_by_id: "SELECT `limits` FROM `rate_limits` WHERE `id` IN (SELECT `rate_limit` FROM `virtual_users` WHERE `email`=%s)" # sql_limits_by_id: "" # Apply limits by sasl usernames. limit_by_sasl: True # If no sasl username is found, or limit by sasl usernames disabled, # apply limits by sender addresses. limit_by_sender: False # If sasl username and sender address not found or disabled, apply limits by ip addresses. limit_by_ip: False # A list of ip networks in cidr notation on which limits are applied. An empty list is equal # to limit_by_ip: False, put "0.0.0.0/0" and "::/0" for every ip addresses. limited_networks: [] # If no limits are reach, which action postfix should do. # see http://www.postfix.org/access.5.html for a list of actions. success_action: "dunno" # If a limit is reach, which action postfix should do. # see http://www.postfix.org/access.5.html for a list of actions. fail_action: "defer_if_permit Rate limit reach, retry later" # If we are unable to to contect the database backend, which action postfix should do. # see http://www.postfix.org/access.5.html for a list of actions. db_error_action: "dunno" # If True, send a report to report_to about users reaching limits each time --clean is called report: False # from who to send emails reports. Must be defined if report: True report_from: null # Address to send emails reports to. Must be defined if report: True # If can be a single email address: # report_to: foo@example.com # or a list of email addresses: # report_to: # - foo@example.com # - bar@example.com report_to: null # Subject of the report email report_subject: "policyd-rate-limit report" # List of number of seconds from the limits list for which you want to be reported. report_limits: [86400] # Only send a report if some users have reach a reported limit. # Otherwise, empty reports may be sent. report_only_if_needed: True # The smtp server to use to send emails [host, port] smtp_server: ["localhost", 25] # Should we use starttls (you should set this to True if you use smtp_credentials) smtp_starttls: False # Should we use credentials to connect to smtp_server ? if yes set ["user", "password"], else null smtp_credentials: null # The time in seconds before an unused socket gets closed delay_to_close: 300 # How sent mail are counted: # * 0 each RCPT TO are counted individualy. This is the how it was done historically. If set to 0, # the postfix check_policy_service must be set in smtpd_recipient_restrictions. # This is deprecated and should not be used anymore # * 1 recipient are counted in the DATA stage. The postfix parameter check_policy_service must be # defined in smtpd_data_restrictions. # This is the new default. count_mode: 1 policyd-rate-limit-1.2.0/policyd_rate_limit/policyd.py0000644000175000017500000004073114472611355023370 0ustar adezorziadezorzi# 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 version 3 for # more details. # # You should have received a copy of the GNU General Public License version 3 # along with this program; if not, write to the Free Software Foundation, Inc., 51 # Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. # # (c) 2015-2016 Valentin Samir import os import sys import socket import time import select import traceback import ast from policyd_rate_limit import utils from policyd_rate_limit.utils import config class Pass(Exception): pass class PolicydError(Exception): pass class PolicydConnectionClosed(PolicydError): pass class Policyd(object): """The policy server class""" socket_data_read = {} socket_data_write = {} last_used = {} last_deprecation_warning = 0 def socket(self): """initialize the socket from the config parameters""" # if socket is a string assume it is the path to an unix socket if isinstance(config.SOCKET, str): try: os.remove(config.SOCKET) except OSError: if os.path.exists(config.SOCKET): # pragma: no cover (should not happen) raise sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) # else asume its a tuple (bind_ip, bind_port) elif ':' in config.SOCKET[0]: # assume ipv6 bind addresse sock = socket.socket(socket.AF_INET6, socket.SOCK_STREAM) elif '.' in config.SOCKET[0]: # assume ipv4 bind addresse sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) else: raise ValueError("bad socket %s" % (config.SOCKET,)) sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) self.sock = sock def close_socket(self): """close the socket depending of the config parameters""" self.sock.close() # if socket was an unix socket, delete it after closing. if isinstance(config.SOCKET, str): try: os.remove(config.SOCKET) except OSError as error: # pragma: no cover (should not happen) sys.stderr.write("%s\n" % error) sys.stderr.flush() def close_connection(self, connection): """close a connection and clean read/write dict""" # Clean up the connection try: del self.socket_data_read[connection] except KeyError: pass try: del self.socket_data_write[connection] except KeyError: pass connection.close() def close_write_conn(self, connection): """Removes a socket from the write dict""" try: del self.socket_data_write[connection] except KeyError: if config.debug: sys.stderr.write( ( "Hmmm, a socket actually used to write a little " "time ago wasn\'t in socket_data_write. Weird.\n" ) ) def run(self): """The main server loop""" try: sock = self.sock sock.bind(config.SOCKET) if isinstance(config.SOCKET, str): os.chmod(config.SOCKET, config.socket_permission) sock.listen(5) self.socket_data_read[sock] = [] if config.debug: sys.stderr.write('waiting for connections\n') sys.stderr.flush() while True: # wait for a socket to read to or to write to (rlist, wlist, _) = select.select( self.socket_data_read.keys(), self.socket_data_write.keys(), [] ) for socket in rlist: # if the socket is the main socket, there is a new connection to accept if socket == sock: connection, client_address = sock.accept() if config.debug: sys.stderr.write('connection from %s\n' % (client_address,)) sys.stderr.flush() self.socket_data_read[connection] = [] # Updates the last_sed time for the socket. self.last_used[connection] = time.time() # else there is data to read on a client socket else: self.read(socket) for socket in wlist: try: data = self.socket_data_write[socket] sent = socket.send(data) data_not_sent = data[sent:] if data_not_sent: self.socket_data_write[socket] = data_not_sent else: self.close_write_conn(socket) # Socket has been used, let's update its last_used time. self.last_used[socket] = time.time() # the socket has been closed during read except KeyError: pass # Closes unused socket for a long time. __to_rm = [] for (socket, last_used) in self.last_used.items(): if socket == sock: continue if time.time() - last_used > config.delay_to_close: self.close_connection(socket) __to_rm.append(socket) for socket in __to_rm: self.last_used.pop(socket) except (KeyboardInterrupt, utils.Exit): for socket in list(self.socket_data_read.keys()): if socket != self.sock: self.close_connection(sock) raise def read(self, connection): """Called then a connection is ready for reads""" try: # get the current buffer of the connection buffer = self.socket_data_read[connection] # read data data = connection.recv(1024).decode('UTF-8') if not data: raise PolicydConnectionClosed() if config.debug: sys.stderr.write(data) sys.stderr.flush() # accumulate it in buffer buffer.append(data) # if data len too short to determine if we are on an empty line, we # concatene datas in buffer if len(data) < 2: data = u"".join(buffer) buffer = [data] # We reach on empty line so the client has finish to send and wait for a response if data[-2:] == "\n\n": data = u"".join(buffer) request = {} # read data are like one key=value per line for line in data.split("\n"): line = line.strip() try: key, value = line.split(u"=", 1) if value: request[key] = value # if value is empty, ignore it except ValueError: pass # process the collected data in the action method self.action(connection, request) else: self.socket_data_read[connection] = buffer # Socket has been used, let's update its last_used time. self.last_used[connection] = time.time() except (KeyboardInterrupt, utils.Exit): self.close_connection(connection) raise except PolicydConnectionClosed: if config.debug: sys.stderr.write("Connection closed\n") sys.stderr.flush() self.close_connection(connection) except Exception: traceback.print_exc() sys.stderr.flush() self.close_connection(connection) def action(self, connection, request): """Called then the client has sent an empty line""" id = None # By default, we do not block emails action = config.success_action try: if not config.database_is_initialized: utils.database_init() with utils.cursor() as cur: try: # only care if the protocol states is RCTP or DATA. # If the policy delegation in postfix # configuration is in smtpd_recipient_restrictions as said in the doc, # possible states are RCPT and VRFY. # If in smtpd_data_restrictions only DATA is possible. if 'protocol_state' not in request: sys.stderr.write("Attribute 'protocol_state' not defined\n") sys.stderr.flush() raise Pass() if config.count_mode not in {0, 1, 2}: sys.stderr.write("Settings 'count_mode' bad value %r\n" % ( config.count_mode, )) sys.stderr.flush() raise Pass() if config.count_mode == 0 and request['protocol_state'].upper() != "RCPT": if config.debug: sys.stderr.write( "Ignoring 'protocol_state' %r\n" % ( request['protocol_state'].upper(), ) ) sys.stderr.flush() raise Pass() if config.count_mode in {1, 2} and request['protocol_state'].upper() != "DATA": if config.debug: sys.stderr.write( "Ignoring 'protocol_state' %r\n" % ( request['protocol_state'].upper(), ) ) sys.stderr.flush() raise Pass() if config.count_mode == 0: if config.debug or time.time() - self.last_deprecation_warning > 60: sys.stderr.write( "WARNING: the 'count_mode' parameter is set to 0. " "This is DEPRECATED. 'count_mode' should be set to 1 and postfix" " config edited as stated in the README or " "policyd-rate-limit.yaml(5)\n" ) sys.stderr.flush() self.last_deprecation_warning = time.time() # if user is authenticated, we filter by sasl username if config.limit_by_sasl and u'sasl_username' in request: id = request[u'sasl_username'] # else, if activated, we filter by sender elif config.limit_by_sender and u'sender' in request: id = request[u'sender'] # else, if activated, we filter by ip source addresse elif ( config.limit_by_ip and u'client_address' in request and utils.is_ip_limited(request[u'client_address']) ): id = request[u'client_address'] # if the client neither send us client ip adresse nor sasl username, jump # to the next section else: raise Pass() if request['protocol_state'].upper() == "RCPT": recipient_count = 1 elif request['protocol_state'].upper() == "DATA": if config.count_mode == 1: recipient_count = max(int(request["recipient_count"]), 1) else: recipient_count = 1 # Custom limits per ID via SQL custom_limits = config.limits_by_id if config.sql_limits_by_id != "": try: cur.execute(config.sql_limits_by_id, [id]) custom_limits[id] = ast.literal_eval(cur.fetchone()[0]) except TypeError: custom_limits = config.limits_by_id if config.debug: sys.stderr.write(u"There is no limit rate in SQL for: %s\n" % (id)) sys.stderr.flush() if config.debug: sys.stderr.write(u"Custom limit(s): %s\n" % custom_limits) sys.stderr.flush() # Here we are limiting against sasl username, sender or source ip addresses. # for each limit periods, we count the number of mails already send. # if the a limit is reach, we change action to fail (deny the mail). for mail_nb, delta in custom_limits.get(id, config.limits): cur.execute( ( "SELECT SUM(recipient_count) FROM mail_count " "WHERE id = %s AND date >= %s" ) % ((config.format_str,)*2), (id, int(time.time() - delta)) ) nb = cur.fetchone()[0] or 0 if config.debug: sys.stderr.write( "%03d/%03d hit since %ss\n" % ( nb + recipient_count, mail_nb, delta ) ) sys.stderr.flush() if nb + recipient_count > mail_nb: action = config.fail_action if config.report and delta in config.report_limits: utils.hit(cur, delta, id) raise Pass() except Pass: pass # If action is a success, record in the database that a new mail has just been sent if action == config.success_action and id is not None: if config.debug: sys.stderr.write(u"insert id %s\n" % id) sys.stderr.flush() cur.execute( "INSERT INTO mail_count VALUES (%s, %s, %s, %s, %s)" % ( (config.format_str,)*5 ), ( id, int(time.time()), recipient_count, request.get("instance", "empty"), request['protocol_state'] ) ) # If action is a failure and using legacy mode, remove previous # recorded event for this mail in the # database. The mail has not been sent, we should not count any recipient if ( config.count_mode == 0 and action == config.fail_action and request['protocol_state'].upper() == "RCPT" and request.get("instance") ): cur.execute( "DELETE FROM mail_count WHERE instance = %s AND protocol_state = %s" % ( (config.format_str,)*2 ), (request["instance"], request['protocol_state']) ) except utils.cursor.backend_module.Error as error: utils.cursor.del_db() action = config.db_error_action sys.stderr.write("Database error: %r\n" % error) data = u"action=%s\n\n" % action if config.debug: sys.stderr.write(data) sys.stderr.flush() # return the result to the client self.socket_data_write[connection] = data.encode('UTF-8') # Wipe the read buffer (otherwise it'll be added up for eternity) self.socket_data_read[connection].clear() # Socket has been used, let's update its last_used time. self.last_used[connection] = time.time() policyd-rate-limit-1.2.0/policyd_rate_limit/tests/0000755000175000017500000000000014472611355022510 5ustar adezorziadezorzipolicyd-rate-limit-1.2.0/policyd_rate_limit/tests/__init__.py0000644000175000017500000000076514472611355024631 0ustar adezorziadezorzi# 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 version 3 for # more details. # # You should have received a copy of the GNU General Public License version 3 # along with this program; if not, write to the Free Software Foundation, Inc., 51 # Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. # # (c) 2015 Valentin Samir policyd-rate-limit-1.2.0/policyd_rate_limit/tests/test_daemon.py0000644000175000017500000003452414472611355025374 0ustar adezorziadezorzi# 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 version 3 for # more details. # # You should have received a copy of the GNU General Public License version 3 # along with this program; if not, write to the Free Software Foundation, Inc., 51 # Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. # # (c) 2016 Valentin Samir import os import tempfile from unittest import TestCase from policyd_rate_limit.tests import utils as test_utils class DaemonTestCase(TestCase): def setUp(self): self.base_config = dict( SOCKET=tempfile.mktemp('.sock'), sqlite_config={"database": tempfile.mktemp('.sqlite3')}, pidfile=tempfile.mktemp('.pid'), limit_by_sasl=True, limit_by_ip=True, limited_networks=["192.168.0.0/16", "ffee::/64"], debug=True, report=True, report_limits=[60, 86400], user="root", group="root", count_mode=0, ) def tearDown(self): if os.path.isfile(self.base_config["sqlite_config"]["database"]): os.remove(self.base_config["sqlite_config"]["database"]) def test_main_unix_socket(self): with test_utils.lauch(self.base_config) as cfg: self.base_test(cfg) def test_main_afinet_socket(self): self.base_config["SOCKET"] = ["127.0.0.1", 27184] with test_utils.lauch(self.base_config) as cfg: self.base_test(cfg) # travis CI/Github Action has no IPv6 support # def test_main_afinet6_socket(self): # self.base_config["SOCKET"] = ["::1", 27184] # with test_utils.lauch(self.base_config) as cfg: # self.base_test(cfg) def test_no_debug_no_report(self): self.base_config["debug"] = False self.base_config["report"] = False with test_utils.lauch(self.base_config) as cfg: self.base_test(cfg) def test_limit(self): with test_utils.lauch(self.base_config) as cfg: for i in range(10): data = test_utils.send_policyd_request(cfg["SOCKET"], sasl_username="test") self.assertEqual(data.strip(), b"action=dunno") # the eleventh counted requests should fail data = test_utils.send_policyd_request(cfg["SOCKET"], sasl_username="test") self.assertEqual(data.strip(), b"action=defer_if_permit Rate limit reach, retry later") def test_limit_batch(self): with test_utils.lauch(self.base_config) as cfg: # Send a batch of mails for i in range(10): data = test_utils.send_policyd_request( cfg["SOCKET"], sasl_username="test", instance="test" ) self.assertEqual(data.strip(), b"action=dunno") # the eleventh counted requests should fail and the 10 previous should be discard data = test_utils.send_policyd_request( cfg["SOCKET"], sasl_username="test", instance="test" ) self.assertEqual(data.strip(), b"action=defer_if_permit Rate limit reach, retry later") # The limit should have be reverted (cf instance) for i in range(10): data = test_utils.send_policyd_request(cfg["SOCKET"], sasl_username="test") self.assertEqual(data.strip(), b"action=dunno") # the eleventh counted requests should fail data = test_utils.send_policyd_request(cfg["SOCKET"], sasl_username="test") self.assertEqual(data.strip(), b"action=defer_if_permit Rate limit reach, retry later") def test_limit_batch2(self): self.base_config["count_mode"] = 1 with test_utils.lauch(self.base_config) as cfg: # Send a batch of mails data = test_utils.send_policyd_request( cfg["SOCKET"], sasl_username="test", protocol_state="DATA", recipient_count=11 ) self.assertEqual(data.strip(), b"action=defer_if_permit Rate limit reach, retry later") # The limit should have be reverted (cf instance) data = test_utils.send_policyd_request( cfg["SOCKET"], sasl_username="test", protocol_state="DATA", recipient_count=10 ) self.assertEqual(data.strip(), b"action=dunno") # the eleventh counted requests should fail data = test_utils.send_policyd_request( cfg["SOCKET"], sasl_username="test", protocol_state="DATA", recipient_count=1 ) self.assertEqual(data.strip(), b"action=defer_if_permit Rate limit reach, retry later") def test_limit_batch3(self): self.base_config["count_mode"] = 2 with test_utils.lauch(self.base_config) as cfg: for _ in range(10): # a single mail with many recipients data = test_utils.send_policyd_request( cfg["SOCKET"], sasl_username="test", protocol_state="DATA", recipient_count=100 ) # it should be accepted self.assertEqual(data.strip(), b"action=dunno") # The 11th mail should be denied data = test_utils.send_policyd_request( cfg["SOCKET"], sasl_username="test", protocol_state="DATA", recipient_count=1 ) self.assertEqual(data.strip(), b"action=defer_if_permit Rate limit reach, retry later") def test_slow_connection(self): with test_utils.lauch(self.base_config) as cfg: with test_utils.sock(cfg["SOCKET"]) as s: msg = test_utils.postfix_request(sasl_username="test") i = 0 s.send(msg[i:10]) i += 10 # run another request before the previous one is ended data = test_utils.send_policyd_request(cfg["SOCKET"], sasl_username="test") self.assertEqual(data.strip(), b"action=dunno") s.send(msg[i:1]) i += 1 data = test_utils.send_policyd_request(cfg["SOCKET"], sasl_username="test") self.assertEqual(data.strip(), b"action=dunno") s.send(msg[i:]) datal = [] datal.append(s.recv(2)) # run another request before the previous one is ended data = test_utils.send_policyd_request(cfg["SOCKET"], sasl_username="test") self.assertEqual(data.strip(), b"action=dunno") datal.append(s.recv(1024)) data = b"".join(datal) self.assertEqual(data.strip(), b"action=dunno") def test_database_unavailable(self): # create the database with open(self.base_config["sqlite_config"]["database"], 'a'): pass # make it unavailable os.chmod(self.base_config["sqlite_config"]["database"], 0) # lauch policyd-rate-limit with the database navailable with test_utils.lauch(self.base_config) as cfg: # as long as the database is unavailable, all response should be dunno for i in range(20): data = test_utils.send_policyd_request(cfg["SOCKET"], sasl_username="test") self.assertEqual(data.strip(), b"action=dunno") # make the database available, it should be initialized upon the next request os.chmod(self.base_config["sqlite_config"]["database"], 0o644) # these requests should be counted for i in range(10): data = test_utils.send_policyd_request(cfg["SOCKET"], sasl_username="test") self.assertEqual(data.strip(), b"action=dunno") # the eleventh counted requests should fail data = test_utils.send_policyd_request(cfg["SOCKET"], sasl_username="test") self.assertEqual(data.strip(), b"action=defer_if_permit Rate limit reach, retry later") def test_bad_config(self): self.base_config["backend"] = 1000 with test_utils.lauch(self.base_config, get_process=True) as p: self.assertEqual(p.wait(timeout=10), 5) def test_get_config(self): with test_utils.lauch( self.base_config, get_process=True, options=["--get-config", "pidfile"] ) as p: self.assertEqual(p.wait(timeout=10), 0) self.assertEqual(p.stdout.read(), self.base_config["pidfile"].encode()) with test_utils.lauch( self.base_config, get_process=True, options=["--get-config", "sqlite_config.database"] ) as p: self.assertEqual(p.wait(timeout=10), 0) self.assertEqual( p.stdout.read(), self.base_config["sqlite_config"]["database"].encode() ) with test_utils.lauch( self.base_config, get_process=True, options=["--get-config", "foo"] ) as p: self.assertEqual(p.wait(timeout=10), 1) with test_utils.lauch( None, get_process=True, options=["--get-config", "pidfile"] ) as p: self.assertEqual(p.wait(timeout=10), 0) self.assertEqual( p.stdout.read(), b'/var/run/policyd-rate-limit/policyd-rate-limit.pid' ) def test_no_config_file_found(self): with test_utils.lauch(None, get_process=True) as p: self.assertEqual(p.wait(timeout=10), 5) def test_already_running(self): with test_utils.lauch(self.base_config, no_coverage=True, get_process=True) as p1: pid = p1.pid with test_utils.lauch(self.base_config, get_process=True) as p2: self.assertEqual(p2.wait(), 3) with open(self.base_config["pidfile"], 'w') as f: f.write("%s" % pid) try: with test_utils.lauch(self.base_config, get_process=True) as p: pass self.assertEqual(p.wait(timeout=10), 0) with open(self.base_config["pidfile"], 'w') as f: f.write("foo") with test_utils.lauch(self.base_config, get_process=True) as p: pass self.assertEqual(p.wait(timeout=10), 0) with open(self.base_config["pidfile"], 'w') as f: f.write("") os.chmod(self.base_config["pidfile"], 0) with test_utils.lauch(self.base_config, get_process=True) as p: self.assertEqual(p.wait(timeout=10), 6) finally: try: os.remove(self.base_config["pidfile"]) except OSError: pass def test_bad_socket_bind_address(self): self.base_config["SOCKET"] = ["toto", 1234] with test_utils.lauch(self.base_config, get_process=True, no_wait=True) as p: self.assertEqual(p.wait(timeout=10), 4) self.base_config["SOCKET"] = ["192.168::1", 1234] with test_utils.lauch(self.base_config, get_process=True, no_wait=True) as p: self.assertEqual(p.wait(timeout=10), 6) def test_clean(self): self.base_config["report_to"] = "foo@example.com" with test_utils.lauch(self.base_config, options=["--clean"], get_process=True) as p: self.assertEqual(p.wait(timeout=10), 0) self.base_config["report_only_if_needed"] = False self.base_config["smtp_server"] = "localhost" with test_utils.lauch(self.base_config, options=["--clean"], get_process=True) as p: self.assertEqual(p.wait(timeout=10), 8) def test_limits_by_id(self): self.base_config["limits_by_id"] = {'foo': [[2, 60]], 'bar': []} with test_utils.lauch(self.base_config) as cfg: self.base_test(cfg) for i in range(20): data = test_utils.send_policyd_request(cfg["SOCKET"], sasl_username="bar") self.assertEqual(data.strip(), b"action=dunno") for i in range(2): data = test_utils.send_policyd_request(cfg["SOCKET"], sasl_username="foo") self.assertEqual(data.strip(), b"action=dunno") data = test_utils.send_policyd_request(cfg["SOCKET"], sasl_username="foo") self.assertEqual(data.strip(), b"action=defer_if_permit Rate limit reach, retry later") def base_test(self, cfg): # test limit by sasl username for i in range(10): data = test_utils.send_policyd_request(cfg["SOCKET"], sasl_username="test") self.assertEqual(data.strip(), b"action=dunno") data = test_utils.send_policyd_request(cfg["SOCKET"], sasl_username="test") self.assertEqual(data.strip(), b"action=defer_if_permit Rate limit reach, retry later") # test limit by ip for i in range(10): data = test_utils.send_policyd_request(cfg["SOCKET"], client_address="192.168.0.1") self.assertEqual(data.strip(), b"action=dunno") data = test_utils.send_policyd_request(cfg["SOCKET"], client_address="192.168.0.1") self.assertEqual(data.strip(), b"action=defer_if_permit Rate limit reach, retry later") # test limit by ip in ipv6 for i in range(10): data = test_utils.send_policyd_request(cfg["SOCKET"], client_address="ffee::1") self.assertEqual(data.strip(), b"action=dunno") data = test_utils.send_policyd_request(cfg["SOCKET"], client_address="ffee::1") self.assertEqual(data.strip(), b"action=defer_if_permit Rate limit reach, retry later") # test limit by ip not limited for i in range(10): data = test_utils.send_policyd_request(cfg["SOCKET"], client_address="10.0.0.1") self.assertEqual(data.strip(), b"action=dunno") data = test_utils.send_policyd_request(cfg["SOCKET"], client_address="10.0.0.1") self.assertEqual(data.strip(), b"action=dunno") # test with bad protocol state for i in range(10): data = test_utils.send_policyd_request( cfg["SOCKET"], sasl_username="test", protocol_state="VRFY" ) self.assertEqual(data.strip(), b"action=dunno") data = test_utils.send_policyd_request( cfg["SOCKET"], sasl_username="test", protocol_state="VRFY" ) self.assertEqual(data.strip(), b"action=dunno") policyd-rate-limit-1.2.0/policyd_rate_limit/tests/utils.py0000644000175000017500000001423614472611355024230 0ustar adezorziadezorzi# 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 version 3 for # more details. # # You should have received a copy of the GNU General Public License version 3 # along with this program; if not, write to the Free Software Foundation, Inc., 51 # Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. # # (c) 2015-2016 Valentin Samir import os import sys import socket import yaml import tempfile import subprocess import time import string import random from contextlib import contextmanager POSTFIX_TEMPLATE = """request=smtpd_access_policy protocol_state=%(protocol_state)s protocol_name=ESMTP client_address=%(client_address)s client_name=mail.example.com reverse_client_name=mail.example.com helo_name=mail.example.com sender=bar@example.com recipient=foo@example.com recipient_count=%(recipient_count)s queue_id= instance=%(instance)s size=0 etrn_domain= stress= sasl_method= sasl_username=%(sasl_username)s sasl_sender= ccert_subject= ccert_issuer= ccert_fingerprint= ccert_pubkey_fingerprint= encryption_protocol=TLSv1.2 encryption_cipher=ECDHE-RSA-AES256-GCM-SHA384 encryption_keysize=256 """ def postfix_request( sasl_username="", client_address="127.0.0.1", protocol_state="RCPT", instance=None, recipient_count=None, ): if instance is None: letters = string.ascii_letters + string.digits + '.' instance = ''.join(random.choice(letters) for _ in range(16)) if recipient_count is None: if protocol_state == "DATA": recipient_count = 1 else: recipient_count = 0 return (POSTFIX_TEMPLATE % { "sasl_username": sasl_username, "client_address": client_address, "protocol_state": protocol_state, "instance": instance, "recipient_count": recipient_count, }).encode("utf-8") @contextmanager def sock(addr): if isinstance(addr, list): addr = tuple(addr) if isinstance(addr, str): s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) elif '.' in addr[0]: s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) elif ':' in addr[0]: s = socket.socket(socket.AF_INET6, socket.SOCK_STREAM) else: raise ValueError(addr) try: s.connect(addr) yield s finally: s.close() def send_policyd_request( addr, sasl_username="", client_address="127.0.0.1", protocol_state="RCPT", instance=None, recipient_count=None, ): with sock(addr) as s: s.send( postfix_request( sasl_username, client_address, protocol_state, instance, recipient_count ) ) data = s.recv(1024) return data def test_socket(addr): with sock(addr): return True def gen_config(new_config): default_config = os.path.abspath( os.path.join(os.path.dirname(__file__), '..', 'policyd-rate-limit.yaml') ) with open(default_config) as f: config = yaml.load(f, Loader=yaml.SafeLoader) config.update(new_config) cfg_path = tempfile.mktemp('.yaml') with open(cfg_path, 'w') as f: yaml.dump(config, f) return cfg_path def search_path(binary): for path in os.environ["PATH"].split(os.pathsep): path = path.strip('"\'') bin_path = os.path.join(path, binary) if os.path.isfile(bin_path): return bin_path break else: return False def launch_instance(new_config, options=None, no_coverage=False): if new_config: cfg_path = gen_config(new_config) else: cfg_path = None bin_path = os.path.abspath( os.path.join(os.path.dirname(__file__), '..', '..', 'policyd-rate-limit') ) # if bin_path do not exists, search in the PATH if not os.path.isfile(bin_path): bin_path = search_path('policyd-rate-limit') if bin_path: sys.stderr.write("Using %s\n" % bin_path) else: raise RuntimeError("The binary policyd-rate-limit was not found, impossible to test it") if no_coverage: cmd = [] else: coverage_path = search_path('coverage') if coverage_path: cmd = ["coverage", "run"] if launch_instance.i > 0: cmd.append("-a") else: cmd = [] sys.stderr.write("The coverage binary was not found, not computing coverage\n") cmd.append(bin_path) if new_config: cmd.extend(["--file", cfg_path]) if options is not None: cmd.extend(options) p = subprocess.Popen(cmd, stdout=subprocess.PIPE) launch_instance.i += 1 return (p, cfg_path) launch_instance.i = 0 @contextmanager def lauch(new_config, get_process=False, options=None, no_coverage=False, no_wait=False): (p, cfg_path) = launch_instance(new_config, options=options, no_coverage=no_coverage) try: if cfg_path: with open(cfg_path) as f: cfg = yaml.load(f, Loader=yaml.SafeLoader) if not no_wait: time.sleep(0.01) for i in range(100): try: test_socket(cfg["SOCKET"]) break except (ConnectionRefusedError, FileNotFoundError): time.sleep(0.01) else: cfg = None if get_process: yield p else: yield cfg finally: p.stdout.close() try: os.kill(p.pid, 10) try: p.wait(timeout=1) except subprocess.TimeoutExpired: p.kill() p.wait(timeout=1) except OSError as error: if error.errno != 3: # No such process raise if cfg_path: os.remove(cfg_path) def test(**new_config): def wraps(funct): def f(*args, **kwargs): with lauch(new_config) as cfg: kwargs["cfg"] = cfg ret = funct(*args, **kwargs) return ret return f return wraps policyd-rate-limit-1.2.0/policyd_rate_limit/utils.py0000644000175000017500000005253714472611355023074 0ustar adezorziadezorzi# 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 version 3 for # more details. # # You should have received a copy of the GNU General Public License version 3 # along with this program; if not, write to the Free Software Foundation, Inc., 51 # Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. # # (c) 2015-2016 Valentin Samir # -*- mode: python; coding: utf-8 -*- import os import sys import threading import collections import ipaddress import time import imp import pwd import grp import warnings import smtplib import yaml from email.mime.text import MIMEText from email.mime.multipart import MIMEMultipart from policyd_rate_limit.const import SQLITE_DB, MYSQL_DB, PGSQL_DB from policyd_rate_limit import config as default_config def ip_network(ip_str): try: return ipaddress.IPv4Network(ip_str) except ipaddress.AddressValueError: return ipaddress.IPv6Network(ip_str) class Exit(Exception): pass class Config(object): """Act as a config module, missing parameters fallbacks to default_config""" _config = None config_file = None database_is_initialized = False def __init__(self, config_file=None): if config_file is None: # search for config files in the following locations config_files = [ # will be deprecated in favor of .yaml file os.path.expanduser("~/.config/policyd-rate-limit.conf"), os.path.expanduser("~/.config/policyd-rate-limit.yaml"), # will be deprecated in favor of .yaml file "/etc/policyd-rate-limit.conf", "/etc/policyd-rate-limit.yaml", ] else: config_files = [config_file] for config_file in config_files: if os.path.isfile(config_file): try: # compatibility with old config style in a python module if config_file.endswith(".conf"): # pragma: no cover (deprecated) self._config = imp.load_source('config', config_file) warnings.warn( ( "New configuration use a .yaml file. " "Please migrate to it and delete you .conf file" ), stacklevel=3 ) cache_file = imp.cache_from_source(config_file) # remove the config pyc file try: os.remove(cache_file) except OSError: pass # remove the __pycache__ dir of the config pyc file if empty try: os.rmdir(os.path.dirname(cache_file)) except OSError: pass # new config file use yaml else: with open(config_file) as f: self._config = yaml.load(f, Loader=yaml.SafeLoader) self.config_file = config_file break except PermissionError: pass # if not config file found, raise en error else: sys.stderr.write( "No config file found or bad permissions, searched for %s\n" % ( ", ".join(config_files), ) ) try: # pragma: no cover (deprecated) self.limited_networks = [ip_network(net) for net in self.limited_netword] warnings.warn( ( "The limited_netword config parameter is deprecated, please use " "limited_networks instead." ), stacklevel=3 ) except AttributeError: self.limited_networks = [ip_network(net) for net in self.limited_networks] def __getattr__(self, name): try: if self.config_file.endswith(".yaml"): ret = self._config[name] else: # pragma: no cover (deprecated) ret = getattr(self._config, name) # If an parameter is not defined in the config file, return its default value. except (AttributeError, KeyError): ret = getattr(default_config, name) if name == "SOCKET": if isinstance(ret, list): ret = tuple(ret) return ret class LazyConfig(object): """A lazy proxy to the Config class allowing to import config before it is initialized""" _config = None format_str = None def __getattr__(self, name): if self._config is None: raise RuntimeError("config is not initialized") return getattr(self._config, name) def setup(self, config_file=None): """initialize the config""" global cursor # initialize config self._config = Config(config_file) # make the cursor class function of the configured backend if config.backend == SQLITE_DB: cursor = make_cursor("sqlite_cursor", config.backend, config.sqlite_config) self.format_str = "?" elif config.backend == MYSQL_DB: cursor = make_cursor("mysql_cursor", config.backend, config.mysql_config) self.format_str = "%s" elif config.backend == PGSQL_DB: cursor = make_cursor("pgsql_cursor", config.backend, config.pgsql_config) self.format_str = "%s" else: raise ValueError("backend %s unknown" % config.backend) def make_directories(): """Create directory for pid and socket and chown if needed""" try: uid = pwd.getpwnam(config.user).pw_uid except KeyError: raise ValueError("User %s in config do not exists" % config.user) try: gid = grp.getgrnam(config.group).gr_gid except KeyError: raise ValueError("Group %s in config do not exists" % config.group) pid_dir = os.path.dirname(config.pidfile) if not os.path.exists(pid_dir): os.mkdir(pid_dir) if not os.listdir(pid_dir): os.chmod(pid_dir, 0o755) os.chown(pid_dir, uid, gid) if isinstance(config.SOCKET, str): socket_dir = os.path.dirname(config.SOCKET) if not os.path.exists(socket_dir): os.mkdir(socket_dir) if not os.listdir(socket_dir): os.chown(socket_dir, uid, gid) if config.backend == SQLITE_DB: try: db_dir = os.path.dirname(config.sqlite_config["database"]) if not os.path.exists(db_dir): os.mkdir(db_dir) if not os.listdir(db_dir): os.chmod(db_dir, 0o700) os.chown(db_dir, uid, gid) except KeyError: pass def drop_privileges(): """If current running use is root, drop privileges to user and group set in the config""" if os.getuid() != 0: # We're not root so, like, whatever dude return # Get the uid/gid from the name running_uid = pwd.getpwnam(config.user).pw_uid running_gid = grp.getgrnam(config.group).gr_gid # Remove group privileges os.setgroups([]) # Try setting the new uid/gid os.setgid(running_gid) os.setuid(running_uid) # Ensure a very conservative umask os.umask(0o077) def make_cursor(name, backend, config): """Create a cursor class usable as a context manager, binding to the backend selected""" if backend == MYSQL_DB: try: import MySQLdb except ImportError: raise ValueError( "You need to install the python3 module MySQLdb to use the mysql backend" ) methods = { '_db': collections.defaultdict(lambda: MySQLdb.connect(**config)), 'backend': MYSQL_DB, 'backend_module': MySQLdb, } elif backend == SQLITE_DB: import sqlite3 methods = { '_db': collections.defaultdict(lambda: sqlite3.connect(**config)), 'backend': SQLITE_DB, 'backend_module': sqlite3, } elif backend == PGSQL_DB: try: import psycopg2 except ImportError: raise ValueError( "You need to install the python3 module psycopg2 to use the postgresql backend" ) methods = { '_db': collections.defaultdict(lambda: psycopg2.connect(**config)), 'backend': PGSQL_DB, 'backend_module': psycopg2, } else: raise RuntimeError("backend %s unknown" % backend) newclass = type(name, (_cursor,), methods) return newclass class _cursor(object): """cursor template class""" backend = None backend_module = None @classmethod def get_db(cls): return cls._db[threading.current_thread()] @classmethod def set_db(cls, value): cls._db[threading.current_thread()] = value @classmethod def del_db(cls): try: cls._db[threading.current_thread()].close() except Exception: pass try: del cls._db[threading.current_thread()] except KeyError: pass def __enter__(self): self.cur = self.get_db().cursor() if self.backend in [MYSQL_DB, PGSQL_DB]: try: if self.backend == MYSQL_DB: self.cur.execute("DO 0") else: self.cur.execute("SELECT 0") self.cur.fetchone() except self.backend_module.Error as error: # SQL server has gone away, probably a timeout, try to reconnect # else, query on the returned cursor will raise on exception if error.args[0] in [2002, 2003, 2006, 2013, 8000, 8001, 8003, 8004, 8006]: self.del_db() self.cur.close() self.cur = self.get_db().cursor() return self.cur def __exit__(self, exc_type, exc_value, traceback): self.cur.close() self.get_db().commit() def is_ip_limited(ip): """Check if ``ip`` is part of a network of ``config.limited_networks``""" try: ip = ipaddress.IPv4Address(ip) except ipaddress.AddressValueError: ip = ipaddress.IPv6Address(ip) for net in config.limited_networks: if ip in net: return True return False def print_fw(msg, length, filler=' ', align_left=True): msg = "%s" % msg if len(msg) > length: raise ValueError("%r must not be longer than %s" % (msg, length)) if align_left: return "%s%s" % (msg, filler * (length - len(msg))) else: return "%s%s" % (filler * (length - len(msg)), msg) def clean(): """Delete old records from the database""" max_delta = 0 for nb, delta in config.limits: max_delta = max(max_delta, delta) # remove old record older than 2*max_delta expired = int(time.time() - max_delta - max_delta) report_text = "" with cursor() as cur: cur.execute("DELETE FROM mail_count WHERE date <= %s" % config.format_str, (expired,)) print("%d records deleted" % cur.rowcount) # if report is True, generate a mail report if config.report and config.report_to: report_text = gen_report(cur) if config.report: # The mail report has been successfully send, flush limit_report cur.execute("DELETE FROM limit_report") # send report if len(report_text) != 0: send_report(report_text) try: if config.backend == PGSQL_DB: # setting autocommit to True disable the transations. This is needed to run VACUUM cursor.get_db().autocommit = True with cursor() as cur: if config.backend == PGSQL_DB: cur.execute("VACUUM ANALYZE") elif config.backend == SQLITE_DB: cur.execute("VACUUM") elif config.backend == MYSQL_DB: if config.report: cur.execute("OPTIMIZE TABLE mail_count, limit_report") else: cur.execute("OPTIMIZE TABLE mail_count") finally: if config.backend == PGSQL_DB: cursor.get_db().autocommit = False def gen_report(cur): cur.execute("SELECT id, delta, hit FROM limit_report") # list to sort ids by hits report = list(cur.fetchall()) text = [] if not config.report_only_if_needed or report: if report: text = ["Below is the table of users who hit a limit since the last cleanup:", ""] # dist to groups deltas by ids report_d = collections.defaultdict(list) max_d = {'id': 2, 'delta': 5, 'hit': 3} for (id, delta, hit) in report: report_d[id].append((delta, hit)) max_d['id'] = max(max_d['id'], len(id)) max_d['delta'] = max(max_d['delta'], len(str(delta)) + 1) max_d['hit'] = max(max_d['hit'], len(str(hit))) # sort by hits report.sort(key=lambda x: x[2]) # table header text.append( "|%s|%s|%s|" % ( print_fw("id", max_d['id']), print_fw("delta", max_d['delta']), print_fw("hit", max_d['hit']) ) ) # table header/data separation text.append( "|%s+%s+%s|" % ( print_fw("", max_d['id'], filler='-'), print_fw("", max_d['delta'], filler='-'), print_fw("", max_d['hit'], filler='-') ) ) for (id, _, _) in report: # sort by delta report_d[id].sort() for (delta, hit) in report_d[id]: # add a table row text.append( "|%s|%s|%s|" % ( print_fw(id, max_d['id'], align_left=False), print_fw("%ss" % delta, max_d['delta'], align_left=False), print_fw(hit, max_d['hit'], align_left=False) ) ) else: text = ["No user hit a limit since the last cleanup"] text.extend(["", "-- ", "policyd-rate-limit"]) return text def send_report(text): # check that smtp_server is wekk formated if isinstance(config.smtp_server, (list, tuple)): if len(config.smtp_server) >= 2: server = smtplib.SMTP(config.smtp_server[0], config.smtp_server[1]) elif len(config.smtp_server) == 1: server = smtplib.SMTP(config.smtp_server[0], 25) else: raise ValueError("bad smtp_server should be a tuple (server_adress, port)") else: raise ValueError("bad smtp_server should be a tuple (server_adress, port)") try: # should we use starttls ? if config.smtp_starttls: server.starttls() # should we use credentials ? if config.smtp_credentials: if ( isinstance(config.smtp_credentials, (list, tuple)) and len(config.smtp_credentials) >= 2 ): server.login(config.smtp_credentials[0], config.smtp_credentials[1]) else: ValueError("bad smtp_credentials should be a tuple (login, password)") if not isinstance(config.report_to, list): report_to = [config.report_to] else: report_to = config.report_to for rcpt in report_to: # Start building the mail report msg = MIMEMultipart() msg['Subject'] = config.report_subject or "" msg['From'] = config.report_from or "" msg['To'] = rcpt msg.attach(MIMEText("\n".join(text), 'plain')) server.sendmail(config.report_from or "", rcpt, msg.as_string()) finally: print('report is sent') server.quit() def database_init(): """Initialize database (create the table and index)""" with cursor() as cur: query = """CREATE TABLE IF NOT EXISTS mail_count ( id varchar(40) NOT NULL, date bigint NOT NULL, recipient_count int DEFAULT 1, instance varchar(40) NOT NULL, protocol_state varchar(10) NOT NULL );""" if config.backend == MYSQL_DB: query_limits = """CREATE TABLE IF NOT EXISTS rate_limits ( id int NOT NULL AUTO_INCREMENT, limits varchar(255) NOT NULL, PRIMARY KEY (id) );""" else: query_limits = """CREATE TABLE IF NOT EXISTS rate_limits ( id int NOT NULL, limits varchar(255) NOT NULL, PRIMARY KEY (id) );""" # if report is enable, also create the table for storing report datas query_report = """CREATE TABLE IF NOT EXISTS limit_report ( id varchar(40) NOT NULL, delta int NOT NULL, hit int NOT NULL DEFAULT 0 );""" # Test the table version try: cur.execute("SELECT recipient_count FROM mail_count") except cursor.backend_module.Error as error: # If the table mail_count exists but the new column # recipient_count does not, drop the table (it only # contains temporary data). It will be recreated below. if ( (cursor.backend == MYSQL_DB and error.args[0] == 1054) or ( cursor.backend == SQLITE_DB and error.args[0] == 'no such column: recipient_count' ) or ( cursor.backend == PGSQL_DB and isinstance(error, cursor.backend_module.errors.UndefinedColumn) ) ): cursor.get_db().commit() cur.execute("DROP TABLE mail_count") # Mysql table 'mail_count' doesn't exist elif cursor.backend == MYSQL_DB and error.args[0] == 1146: cursor.get_db().commit() elif cursor.backend == SQLITE_DB and error.args[0] == 'no such table: mail_count': cursor.get_db().commit() elif ( cursor.backend == PGSQL_DB and isinstance(error, cursor.backend_module.errors.UndefinedTable) ): cursor.get_db().commit() else: raise # Create the table if needed try: if cursor.backend == MYSQL_DB: # ignore possible warnings about the table already existing warnings.filterwarnings('ignore', category=cursor.backend_module.Warning) cur.execute(query) if config.report: cur.execute(query_report) if config.sql_limits_by_id and config.backend in [MYSQL_DB, PGSQL_DB]: cur.execute(query_limits) finally: warnings.resetwarnings() try: cur.execute('CREATE INDEX %s mail_count_index ON mail_count(id, date)' % ( "" if cursor.backend == 1 else "IF NOT EXISTS" )) except cursor.backend_module.Error as error: # Duplicate key name for the mysql backend if error.args[0] not in [1061]: raise # if report is enable, create and unique index on (id, delta) if config.report: try: cur.execute( 'CREATE UNIQUE INDEX %s limit_report_index ON limit_report(id, delta)' % ( "" if cursor.backend == 1 else "IF NOT EXISTS" ) ) except cursor.backend_module.Error as error: # Duplicate key name for the mysql backend if error.args[0] not in [1061]: raise config.database_is_initialized = True def hit(cur, delta, id): # if no row is updated, (id, delta) do not exists and insert cur.execute( "UPDATE limit_report SET hit=hit+1 WHERE id = %s and delta = %s" % ( (config.format_str,)*2 ), (id, delta) ) if cur.rowcount <= 0: cur.execute( "INSERT INTO limit_report (id, delta, hit) VALUES (%s, %s, 1)" % ( (config.format_str,)*2 ), (id, delta) ) def write_pidfile(): """write current pid file to ``config.pidfile``""" try: with open(config.pidfile, 'w') as f: f.write("%s" % os.getpid()) except PermissionError as error: raise ValueError("Unable to write pid file, %s." % error) def remove_pidfile(): """Try to remove ``config.pidfile``""" try: os.remove(config.pidfile) except OSError: pass def get_config(dotted_string): """ Return the config parameter designated by ``dotted_string``. Dots are used as separator between dict and key. """ params = dotted_string.split('.') obj = getattr(config, params[0]) for param in params[1:]: obj = obj[param] return obj def exit_signal_handler(signal, frame): """SIGUSR1 signal handler. Cause the program to exit gracefully. Used for coverage computation""" raise Exit() config = LazyConfig() policyd-rate-limit-1.2.0/pytest.ini0000644000175000017500000000014314472611355017521 0ustar adezorziadezorzi[pytest] testpaths = policyd_rate_limit/tests/ norecursedirs = .* build dist docs python_paths = . policyd-rate-limit-1.2.0/requirements-dev.txt0000644000175000017500000000005214472611355021527 0ustar adezorziadezorzipyyaml pytest pytest-pythonpath coverage policyd-rate-limit-1.2.0/setup.cfg0000644000175000017500000000014514472611355017313 0ustar adezorziadezorzi[metadata] description-file = README.rst [egg_info] tag_build = tag_date = 0 tag_svn_revision = 0 policyd-rate-limit-1.2.0/setup.py0000755000175000017500000000436614472611355017220 0ustar adezorziadezorzi#!/usr/bin/env python3 from setuptools import setup import os DESC = """Postfix rate limit policy server implemented in Python3.""" with open(os.path.join(os.path.dirname(__file__), 'README.rst')) as readme: README = readme.read() data_files = [] def add_data_file(dir, file, check_dir=False, mkdir=False): path = os.path.join(dir, os.path.basename(file)) if not os.path.isfile(path): if not check_dir or mkdir or os.path.isdir(dir): if mkdir: try: os.mkdir(dir) except OSError: pass data_files.append((dir, [file])) # if install as root populate /etc if os.getuid() == 0: add_data_file("/etc", 'policyd_rate_limit/policyd-rate-limit.yaml') add_data_file('/etc/init.d', 'init/policyd-rate-limit') add_data_file( "/etc/systemd/system", 'init/policyd-rate-limit.service', check_dir=True ) # else use user .config dir else: conf_dir = os.path.expanduser("~/.config/") add_data_file(conf_dir, 'policyd_rate_limit/policyd-rate-limit.yaml', mkdir=True) setup( name='policyd-rate-limit', version='1.2.0', description=DESC, long_description=README, author='Valentin Samir', author_email='valentin.samir@crans.org', license='GPLv3', url='https://github.com/nitmir/policyd-rate-limit', download_url="https://github.com/nitmir/policyd-rate-limit/releases/latest", packages=['policyd_rate_limit', 'policyd_rate_limit.tests'], package_data={ 'policyd_rate_limit': [ 'policyd-rate-limit.conf', 'policyd-rate-limit.yaml', ] }, keywords=['Postfix', 'rate', 'limit', 'email'], scripts=['policyd-rate-limit'], data_files=data_files, classifiers=[ 'Environment :: No Input/Output (Daemon)', 'Intended Audience :: Developers', 'License :: OSI Approved :: GNU General Public License v3 (GPLv3)', 'Operating System :: POSIX', 'Programming Language :: Python', 'Programming Language :: Python :: 3', 'Topic :: Communications :: Email :: Mail Transport Agents', 'Topic :: Communications :: Email :: Filters', ], install_requires=["PyYAML >= 3.11"], zip_safe=False, ) policyd-rate-limit-1.2.0/tox.ini0000644000175000017500000000201614472611355017004 0ustar adezorziadezorzi[tox] envlist= flake8, check_rst, py3 [flake8] max-line-length=100 [base] deps = -r{toxinidir}/requirements-dev.txt [testenv] commands= py.test -rw {posargs:policyd_rate_limit/tests/} coverage report [testenv:flake8] basepython=python3 deps=flake8 skip_install=True commands= flake8 {toxinidir}/policyd_rate_limit {toxinidir}/policyd-rate-limit [testenv:check_rst] basepython=python3 deps= docutils Pygments skip_install=True commands= rst2html.py --strict {toxinidir}/README.rst /dev/null [testenv:py3] basepython=python3 deps = {[base]deps} [testenv:py39] basepython=python3.9 deps = {[base]deps} [testenv:coverage] basepython=python3 passenv= COVERAGE_TOKEN CI_BUILD_REF_NAME TRAVIS_BRANCH TRAVIS_PULL_REQUEST deps={[base]deps} skip_install=True commands= py.test -rw {posargs:policyd_rate_limit/tests/} coverage report coverage html {toxinidir}/.update_coverage "{toxinidir}" "policyd-rate-limit" allowlist_externals= {toxinidir}/.update_coverage