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Author SHA1 Message Date
link2xt
ee739e4956 Add scripts/generate-dns-zone.sh 2023-10-24 21:21:43 +00:00
52 changed files with 259 additions and 3349 deletions

5
.gitignore vendored
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@@ -3,11 +3,6 @@ __pycache__/
*.py[cod]
*$py.class
*.swp
www/privacy.html*
www/index.html*
www/info.html*
*qr-*.png
# C extensions
*.so

121
README.md
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@@ -1,96 +1,26 @@
# Chat Mail server configuration
<img width="800px" src="www/src/collage-top.png"/>
# Chatmail instances optimized for Delta Chat apps
This repository helps to setup a ready-to-use chatmail instance
This repository setups a ready-to-go chatmail instance
comprised of a minimal setup of the battle-tested
[postfix smtp](https://www.postfix.org) and [dovecot imap](https://www.dovecot.org) services.
[postfix smtp server](https://www.postfix.org) and [dovecot imap server](https://www.dovecot.org).
The setup is designed and optimized for providing chatmail accounts
for use by [Delta Chat apps](https://delta.chat).
## Getting started
Chatmail accounts are automatically created by a first login,
after which the initially specified password is required for using them.
## Getting Started deploying your own chatmail instance
1. Prepare your local (presumably Linux) system:
1. prepare your local system:
scripts/init.sh
2. Setup a domain with `A` and `AAAA` records for your chatmail server.
2. setup a domain with `A` and `AAAA` records for your chatmail server
3. Set environment variable to the chatmail domain you want to setup:
3. set environment variable to the chatmail domain you want to setup:
export CHATMAIL_DOMAIN=c1.testrun.org # replace with your host
4. Fill in privacy contact data into the `chatmail.ini` file
5. Deploy the chat mail instance to your chatmail server:
4. run the deploy of the chat mail instance:
scripts/deploy.sh
This script remotely sets up packages and configures the chatmail provider.
6. Run `scripts/generate-dns-zone.sh` and
transfer the generated DNS records at your DNS provider
### Home page and getting started for users
The `deploy.sh` script deploys
- a default `index.html` along with a QR code that users can click to
create accounts on your chatmail provider,
- a default `info.html` that is linked from the home page,
- a default `policy.html` that is linked from the home page.
All files are generated by the according markdown `.md` file in the `www` directory.
### Refining the web pages
The `scripts/webdev.sh` script supports live development of the chatmail web presence:
```
scripts/init.sh # to locally initialize python virtual environments etc.
scripts/webdev.sh
```
- uses the `www/src/page-layout.html` file for producing html documents
from `www/src/*.md` files.
- continously builds the web presence reading files from `www/src` directory
and generating html files and copying assets to the `www/build` directory.
- Starts a browser window automatically where you can "refresh" as needed.
Note that this script is not needed for running `scripts/deploy.sh"
which deploys the whole chatmail setup remotely.
The code that generates the web pages is identical
which means that `webdev.sh` gives a pretty good preview.
### Ports
Postfix listens on ports 25 (smtp) and 587 (submission) and 465 (submissions).
Dovecot listens on ports 143(imap) and 993 (imaps).
Delta Chat will, however, discover all ports and configurations
automatically by reading the `autoconfig.xml` file from the chatmail instance.
## Emergency Commands to disable automatic account creation
If you need to stop account creation,
e.g. because some script is wildly creating accounts, run:
touch /etc/chatmail-nocreate
While this file is present, account creation will be blocked.
5. run `scripts/generate-dns-zone.sh` and create the generated DNS records at your DNS provider
## Running tests and benchmarks (offline and online)
@@ -105,27 +35,28 @@ While this file is present, account creation will be blocked.
scripts/bench.sh
## Running tests (offline and online)
## Development Background for chatmail instances
```
## Dovecot/Postfix configuration
This repository drives the development of "chatmail instances",
comprised of minimal setups of
### Ports
- [postfix smtp server](https://www.postfix.org)
- [dovecot imap server](https://www.dovecot.org)
Postfix listens on ports 25 (smtp) and 587 (submission) and 465 (submissions).
Dovecot listens on ports 143(imap) and 993 (imaps).
as well as two custom services that are integrated with these two:
## DNS
- `chatmaild/src/chatmaild/doveauth.py` implements
create-on-login account creation semantics and is used
by Dovecot during login authentication and by Postfix
which in turn uses [Dovecot SASL](https://doc.dovecot.org/configuration_manual/authentication/dict/#complete-example-for-authenticating-via-a-unix-socket)
to authenticate users
to send mails for them.
- `chatmaild/src/chatmaild/filtermail.py` prevents
unencrypted e-mail from leaving the chatmail instance
and is integrated into postfix's outbound mail pipelines.
For DKIM you must add a DNS entry as found in /etc/opendkim/selector.txt on your chatmail instance.
The above `scripts/deploy.sh` prints out the DKIM selector and DNS entry you
need to setup with your DNS provider.
## Emergency Commands
If you need to stop account creation,
e.g. because some script is wildly creating accounts,
just run `touch /tmp/nocreate`.
You can remove the file
as soon as the attacker was banned
by different means.

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@@ -1,32 +0,0 @@
[params]
# how many mails a user can send out per minute
max_user_send_per_minute = 60
# list of e-mail recipients for which to accept outbound un-encrypted mails
passthrough_recipients = privacy@testrun.org xstore@testrun.org
# where the filtermail SMTP service listens
filtermail_smtp_port = 10080
# to which port to re-inject messages after they passed filtermail
postfix_reinject_port = 10025
[privacy:testrun]
# the settings in this section are only applied
# if the instantiated mail domain shell-matches the 'domain' setting
domain = *.testrun.org
privacy_postal =
Merlinux GmbH, Represented by the managing director H. Krekel,
Reichgrafen Str. 20, 79102 Freiburg, Germany
privacy_mail = delta-privacy@merlinux.eu
privacy_pdo =
Prof. Dr. Fabian Schmieder, lexICT UG (limited), Ostfeldstr. 49, 30559 Hannover.
You can contact him at *delta-privacy@merlinux.eu* (Keyword: DPO)
privacy_supervisor =
State Commissioner for Data Protection and Freedom of Information of
Baden-Württemberg in 70173 Stuttgart, Germany.

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@@ -4,21 +4,17 @@ build-backend = "setuptools.build_meta"
[project]
name = "chatmaild"
version = "0.2"
version = "0.1"
dependencies = [
"aiosmtpd",
"iniconfig",
"aiosmtpd"
]
[project.scripts]
doveauth = "chatmaild.doveauth:main"
doveauth-dictproxy = "chatmaild.dictproxy:main"
filtermail = "chatmaild.filtermail:main"
[tool.pytest.ini_options]
addopts = "-v -ra --strict-markers"
log_format = "%(asctime)s %(levelname)s %(message)s"
log_date_format = "%Y-%m-%d %H:%M:%S"
log_level = "INFO"
[tool.tox]
legacy_tox_ini = """

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@@ -1,41 +0,0 @@
from pathlib import Path
from fnmatch import fnmatch
import iniconfig
system_mailname_path = Path("/etc/mailname")
def read_config(inipath, mailname=None):
if mailname is None:
with open(system_mailname_path) as f:
mailname = f.read().strip()
ini = iniconfig.IniConfig(inipath)
privacy = {}
for section in ini:
if section.name.startswith("privacy:"):
domain = section["domain"]
if fnmatch(mailname, domain):
privacy = section
break
return Config(inipath, mailname, privacy, params=ini.sections["params"])
class Config:
def __init__(self, inipath, mailname, privacy, params):
self._inipath = inipath
self.mailname = mailname
self.privacy_postal = privacy.get("privacy_postal")
self.privacy_mail = privacy.get("privacy_mail")
self.privacy_pdo = privacy.get("privacy_pdo")
self.privacy_supervisor = privacy.get("privacy_supervisor")
self.max_user_send_per_minute = int(params["max_user_send_per_minute"])
self.filtermail_smtp_port = int(params["filtermail_smtp_port"])
self.postfix_reinject_port = int(params["postfix_reinject_port"])
self.passthrough_recipients = params["passthrough_recipients"].split()
def _getbytefile(self):
return open(self._inipath, "rb")

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@@ -33,6 +33,13 @@ class Connection:
def cursor(self):
return self._sqlconn.cursor()
def create_user(self, addr: str, password: str):
"""Create a row in the users table."""
self.execute("PRAGMA foreign_keys=on")
q = """INSERT INTO users (addr, password, last_login)
VALUES (?, ?, ?)"""
self.execute(q, (addr, password, int(time.time())))
def get_user(self, addr: str) -> {}:
"""Get a row from the users table."""
q = "SELECT addr, password, last_login from users WHERE addr = ?"

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@@ -1,6 +1,5 @@
import logging
import os
import time
import sys
import json
import crypt
@@ -22,29 +21,15 @@ def encrypt_password(password: str):
return "{SHA512-CRYPT}" + passhash
def is_allowed_to_create(user, cleartext_password) -> bool:
"""Return True if user and password are admissable."""
def create_user(db, user, password):
if os.path.exists(NOCREATE_FILE):
logging.warning(f"blocked account creation because {NOCREATE_FILE!r} exists.")
return False
if len(cleartext_password) < 9:
logging.warning("Password needs to be at least 9 characters long")
return False
parts = user.split("@")
if len(parts) != 2:
logging.warning(f"user {user!r} is not a proper e-mail address")
return False
localpart, domain = parts
if domain == "nine.testrun.org":
# nine.testrun.org policy, username has to be exactly nine chars
if len(localpart) != 9:
logging.warning(f"localpart {localpart!r} has not exactly nine chars")
return False
return True
logging.warning(
f"Didn't create account: {NOCREATE_FILE} exists. Delete the file to enable account creation."
)
return
with db.write_transaction() as conn:
conn.create_user(user, password)
return dict(home=f"/home/vmail/{user}", uid="vmail", gid="vmail", password=password)
def get_user_data(db, user):
@@ -60,34 +45,16 @@ def lookup_userdb(db, user):
return get_user_data(db, user)
def lookup_passdb(db, user, cleartext_password):
with db.write_transaction() as conn:
userdata = conn.get_user(user)
if userdata:
# Update last login time.
conn.execute(
"UPDATE users SET last_login=? WHERE addr=?", (int(time.time()), user)
)
userdata["uid"] = "vmail"
userdata["gid"] = "vmail"
return userdata
if not is_allowed_to_create(user, cleartext_password):
return
encrypted_password = encrypt_password(cleartext_password)
q = """INSERT INTO users (addr, password, last_login)
VALUES (?, ?, ?)"""
conn.execute(q, (user, encrypted_password, int(time.time())))
return dict(
home=f"/home/vmail/{user}",
uid="vmail",
gid="vmail",
password=encrypted_password,
)
def lookup_passdb(db, user, password):
userdata = get_user_data(db, user)
if not userdata:
return create_user(db, user, encrypt_password(password))
userdata["password"] = userdata["password"].strip()
return userdata
def handle_dovecot_request(msg, db, mail_domain):
print(f"received msg: {msg!r}", file=sys.stderr)
short_command = msg[0]
if short_command == "L": # LOOKUP
parts = msg[1:].split("\t")
@@ -105,18 +72,19 @@ def handle_dovecot_request(msg, db, mail_domain):
reply_command = "N"
elif type == "passdb":
if user.endswith(f"@{mail_domain}"):
res = lookup_passdb(db, user, cleartext_password=args[0])
res = lookup_passdb(db, user, password=args[0])
if res:
reply_command = "O"
else:
reply_command = "N"
print(f"res: {res!r}", file=sys.stderr)
json_res = json.dumps(res) if res else ""
return f"{reply_command}{json_res}\n"
return None
class ThreadedUnixStreamServer(ThreadingMixIn, UnixStreamServer):
request_queue_size = 100
pass
def main():
@@ -128,20 +96,15 @@ def main():
class Handler(StreamRequestHandler):
def handle(self):
try:
while True:
msg = self.rfile.readline().strip().decode()
if not msg:
break
res = handle_dovecot_request(msg, db, mail_domain)
if res:
self.wfile.write(res.encode("ascii"))
self.wfile.flush()
else:
logging.warn("request had no answer: %r", msg)
except Exception:
logging.exception("Exception in the handler")
raise
while True:
msg = self.rfile.readline().strip().decode()
if not msg:
break
res = handle_dovecot_request(msg, db, mail_domain)
if res:
print(f"sending result: {res!r}", file=sys.stderr)
self.wfile.write(res.encode("ascii"))
self.wfile.flush()
try:
os.unlink(socket)

View File

@@ -2,7 +2,7 @@
Description=Dict authentication proxy for dovecot
[Service]
ExecStart={execpath} /run/dovecot/doveauth.socket vmail /home/vmail/passdb.sqlite
ExecStart=/usr/local/bin/doveauth-dictproxy /run/dovecot/doveauth.socket vmail /home/vmail/passdb.sqlite
Restart=always
RestartSec=30

View File

@@ -11,8 +11,6 @@ from aiosmtpd.smtp import SMTP
from aiosmtpd.controller import Controller
from smtplib import SMTP as SMTPClient
from .config import read_config
def check_encrypted(message):
"""Check that the message is an OpenPGP-encrypted message."""
@@ -64,21 +62,19 @@ def check_mdn(message, envelope):
return True
async def asyncmain_beforequeue(config):
port = config.filtermail_smtp_port
Controller(BeforeQueueHandler(config), hostname="127.0.0.1", port=port).start()
class SMTPController(Controller):
def factory(self):
return SMTP(self.handler, **self.SMTP_kwargs)
class BeforeQueueHandler:
def __init__(self, config):
self.config = config
def __init__(self):
self.send_rate_limiter = SendRateLimiter()
async def handle_MAIL(self, server, session, envelope, address, mail_options):
logging.info(f"handle_MAIL from {address}")
envelope.mail_from = address
max_sent = self.config.max_user_send_per_minute
if not self.send_rate_limiter.is_sending_allowed(address, max_sent):
if not self.send_rate_limiter.is_sending_allowed(address):
return f"450 4.7.1: Too much mail from {address}"
parts = envelope.mail_from.split("@")
@@ -89,58 +85,62 @@ class BeforeQueueHandler:
async def handle_DATA(self, server, session, envelope):
logging.info("handle_DATA before-queue")
error = self.check_DATA(envelope)
error = check_DATA(envelope)
if error:
return error
logging.info("re-injecting the mail that passed checks")
client = SMTPClient("localhost", self.config.postfix_reinject_port)
client = SMTPClient("localhost", "10025")
client.sendmail(envelope.mail_from, envelope.rcpt_tos, envelope.content)
return "250 OK"
def check_DATA(self, envelope):
"""the central filtering function for e-mails."""
logging.info(f"Processing DATA message from {envelope.mail_from}")
message = BytesParser(policy=policy.default).parsebytes(envelope.content)
mail_encrypted = check_encrypted(message)
async def asyncmain_beforequeue(port):
Controller(BeforeQueueHandler(), hostname="127.0.0.1", port=port).start()
_, from_addr = parseaddr(message.get("from").strip())
logging.info(f"mime-from: {from_addr} envelope-from: {envelope.mail_from!r}")
if envelope.mail_from.lower() != from_addr.lower():
return f"500 Invalid FROM <{from_addr!r}> for <{envelope.mail_from!r}>"
if not mail_encrypted and check_mdn(message, envelope):
return
def check_DATA(envelope):
"""the central filtering function for e-mails."""
logging.info(f"Processing DATA message from {envelope.mail_from}")
passthrough_recipients = self.config.passthrough_recipients
envelope_from_domain = from_addr.split("@").pop()
for recipient in envelope.rcpt_tos:
if envelope.mail_from == recipient:
# Always allow sending emails to self.
continue
if recipient in passthrough_recipients:
continue
res = recipient.split("@")
if len(res) != 2:
return f"500 Invalid address <{recipient}>"
_recipient_addr, recipient_domain = res
message = BytesParser(policy=policy.default).parsebytes(envelope.content)
mail_encrypted = check_encrypted(message)
is_outgoing = recipient_domain != envelope_from_domain
if is_outgoing and not mail_encrypted:
is_securejoin = message.get("secure-join") in ["vc-request", "vg-request"]
if not is_securejoin:
return f"500 Invalid unencrypted mail to <{recipient}>"
_, from_addr = parseaddr(message.get("from").strip())
logging.info(f"mime-from: {from_addr} envelope-from: {envelope.mail_from!r}")
if envelope.mail_from.lower() != from_addr.lower():
return f"500 Invalid FROM <{from_addr!r}> for <{envelope.mail_from!r}>"
if not mail_encrypted and check_mdn(message, envelope):
return
envelope_from_domain = from_addr.split("@").pop()
for recipient in envelope.rcpt_tos:
if envelope.mail_from == recipient:
# Always allow sending emails to self.
continue
res = recipient.split("@")
if len(res) != 2:
return f"500 Invalid address <{recipient}>"
_recipient_addr, recipient_domain = res
is_outgoing = recipient_domain != envelope_from_domain
if is_outgoing and not mail_encrypted:
is_securejoin = message.get("secure-join") in ["vc-request", "vg-request"]
if not is_securejoin:
return f"500 Invalid unencrypted mail to <{recipient}>"
class SendRateLimiter:
MAX_USER_SEND_PER_MINUTE = 80
def __init__(self):
self.addr2timestamps = {}
def is_sending_allowed(self, mail_from, max_send_per_minute):
def is_sending_allowed(self, mail_from):
last = self.addr2timestamps.setdefault(mail_from, [])
now = time.time()
last[:] = [ts for ts in last if ts >= (now - 60)]
if len(last) <= max_send_per_minute:
if len(last) <= self.MAX_USER_SEND_PER_MINUTE:
last.append(now)
return True
return False
@@ -149,10 +149,9 @@ class SendRateLimiter:
def main():
args = sys.argv[1:]
assert len(args) == 1
config = read_config(args[0])
logging.basicConfig(level=logging.WARN)
logging.basicConfig(level=logging.INFO)
loop = asyncio.new_event_loop()
asyncio.set_event_loop(loop)
task = asyncmain_beforequeue(config)
task = asyncmain_beforequeue(port=int(args[0]))
loop.create_task(task)
loop.run_forever()

View File

@@ -2,7 +2,7 @@
Description=Chatmail Postfix BeforeQeue filter
[Service]
ExecStart={execpath} {config_path}
ExecStart=/usr/local/bin/filtermail 10080
Restart=always
RestartSec=30

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@@ -1,28 +0,0 @@
#!/usr/bin/python3
""" CGI script for creating new accounts. """
import json
import random
mailname_path = "/etc/mailname"
def create_newemail_dict(domain):
alphanumeric = "abcdefghijklmnopqrstuvwxyz1234567890"
user = "".join(random.choices(alphanumeric, k=9))
password = "".join(random.choices(alphanumeric, k=12))
return dict(email=f"{user}@{domain}", password=f"{password}")
def print_new_account():
domain = open(mailname_path).read().strip()
creds = create_newemail_dict(domain=domain)
print("Content-Type: application/json")
print("")
print(json.dumps(creds))
if __name__ == "__main__":
print_new_account()

View File

@@ -7,9 +7,6 @@ name = "deploy-chatmail"
version = "0.1"
dependencies = [
"pyinfra",
"pillow",
"qrcode",
"markdown",
]
[tool.pytest.ini_options]

View File

@@ -1,117 +1,62 @@
"""
Chat Mail pyinfra deploy.
"""
import sys
import importlib.resources
import subprocess
import shutil
import io
from pathlib import Path
from pyinfra import host
from pyinfra.operations import apt, files, server, systemd, pip
from pyinfra.operations import apt, files, server, systemd
from pyinfra.facts.files import File
from pyinfra.facts.systemd import SystemdEnabled
from .acmetool import deploy_acmetool
import chatmaild.filtermail
from chatmaild.config import read_config
def _build_chatmaild(dist_dir) -> None:
dist_dir = Path(dist_dir).resolve()
if dist_dir.exists():
shutil.rmtree(dist_dir)
dist_dir.mkdir()
subprocess.check_output(
[sys.executable, "-m", "build", "-n"]
+ ["--sdist", "chatmaild", "--outdir", str(dist_dir)]
def _install_chatmaild() -> None:
chatmaild_filename = "chatmaild-0.1.tar.gz"
chatmaild_path = importlib.resources.files(__package__).joinpath(
f"../../../dist/{chatmaild_filename}"
)
entries = list(dist_dir.iterdir())
assert len(entries) == 1
return entries[0]
def remove_legacy_artifacts():
# disable legacy doveauth-dictproxy.service
if host.get_fact(SystemdEnabled).get("doveauth-dictproxy.service"):
systemd.service(
name="Disable legacy doveauth-dictproxy.service",
service="doveauth-dictproxy.service",
running=False,
enabled=False,
)
def _install_remote_venv_with_chatmaild(config) -> None:
remove_legacy_artifacts()
dist_file = _build_chatmaild(dist_dir=Path("chatmaild/dist"))
remote_base_dir = "/usr/local/lib/chatmaild"
remote_dist_file = f"{remote_base_dir}/dist/{dist_file.name}"
remote_venv_dir = f"{remote_base_dir}/venv"
remote_chatmail_inipath = f"{remote_base_dir}/chatmail.ini"
root_owned = dict(user="root", group="root", mode="644")
apt.packages(
name="apt install python3-virtualenv",
packages=["python3-virtualenv"],
)
files.put(
name="Upload chatmaild source package",
src=dist_file.open("rb"),
dest=remote_dist_file,
create_remote_dir=True,
**root_owned,
)
files.put(
name=f"Upload {remote_chatmail_inipath}",
src=config._getbytefile(),
dest=remote_chatmail_inipath,
**root_owned,
)
pip.virtualenv(
name=f"chatmaild virtualenv {remote_venv_dir}",
path=remote_venv_dir,
always_copy=True,
)
server.shell(
name=f"forced pip-install {dist_file.name}",
commands=[
f"{remote_venv_dir}/bin/pip install --force-reinstall {remote_dist_file}"
],
)
# install systemd units
for fn in (
"doveauth",
"filtermail",
):
params = dict(
execpath=f"{remote_venv_dir}/bin/{fn}",
config_path=remote_chatmail_inipath,
)
source_path = importlib.resources.files("chatmaild").joinpath(f"{fn}.service.f")
content = source_path.read_text().format(**params).encode()
remote_path = f"/tmp/{chatmaild_filename}"
if Path(str(chatmaild_path)).exists():
files.put(
name=f"Upload {fn}.service",
src=io.BytesIO(content),
dest=f"/etc/systemd/system/{fn}.service",
**root_owned,
name="Upload chatmaild source package",
src=chatmaild_path.open("rb"),
dest=remote_path,
)
systemd.service(
name=f"Setup {fn} service",
service=f"{fn}.service",
running=True,
enabled=True,
restarted=True,
daemon_reload=True,
apt.packages(
name="apt install python3-aiosmtpd",
packages=["python3-aiosmtpd", "python3-pip"],
)
# --no-deps because aiosmtplib is installed with `apt`.
server.shell(
name="install chatmaild with pip",
commands=[f"pip install --break-system-packages {remote_path}"],
)
for fn in (
"doveauth-dictproxy",
"filtermail",
):
files.put(
name=f"Upload {fn}.service",
src=importlib.resources.files("chatmaild")
.joinpath(f"{fn}.service")
.open("rb"),
dest=f"/etc/systemd/system/{fn}.service",
user="root",
group="root",
mode="644",
)
systemd.service(
name=f"Setup {fn} service",
service=f"{fn}.service",
running=True,
enabled=True,
restarted=True,
daemon_reload=True,
)
def _configure_opendkim(domain: str, dkim_selector: str) -> bool:
"""Configures OpenDKIM"""
@@ -178,45 +123,7 @@ def _configure_opendkim(domain: str, dkim_selector: str) -> bool:
return need_restart
def _install_mta_sts_daemon() -> bool:
need_restart = False
config = files.put(
name="upload postfix-mta-sts-resolver config",
src=importlib.resources.files(__package__).joinpath(
"postfix/mta-sts-daemon.yml"
),
dest="/etc/mta-sts-daemon.yml",
user="root",
group="root",
mode="644",
)
need_restart |= config.changed
server.shell(
name="install postfix-mta-sts-resolver with pip",
commands=[
"python3 -m venv /usr/local/lib/postfix-mta-sts-resolver",
"/usr/local/lib/postfix-mta-sts-resolver/bin/pip install postfix-mta-sts-resolver",
],
)
systemd_unit = files.put(
name="upload mta-sts-daemon systemd unit",
src=importlib.resources.files(__package__).joinpath(
"postfix/mta-sts-daemon.service"
),
dest="/etc/systemd/system/mta-sts-daemon.service",
user="root",
group="root",
mode="644",
)
need_restart |= systemd_unit.changed
return need_restart
def _configure_postfix(config: chatmaild.config.Config, debug: bool = False) -> bool:
def _configure_postfix(domain: str, debug: bool = False) -> bool:
"""Configures Postfix SMTP server."""
need_restart = False
@@ -226,7 +133,7 @@ def _configure_postfix(config: chatmaild.config.Config, debug: bool = False) ->
user="root",
group="root",
mode="644",
config=config,
config={"domain_name": domain},
)
need_restart |= main_config.changed
@@ -237,7 +144,6 @@ def _configure_postfix(config: chatmaild.config.Config, debug: bool = False) ->
group="root",
mode="644",
debug=debug,
config=config,
)
need_restart |= master_config.changed
@@ -277,17 +183,6 @@ def _configure_dovecot(mail_server: str, debug: bool = False) -> bool:
mode="644",
)
# as per https://doc.dovecot.org/configuration_manual/os/
# it is recommended to set the following inotify limits
for name in ("max_user_instances", "max_user_watches"):
key = f"fs.inotify.{name}"
server.sysctl(
name=f"Change {key}",
key=key,
value=65535,
persist=True,
)
return need_restart
@@ -296,7 +191,7 @@ def _configure_nginx(domain: str, debug: bool = False) -> bool:
need_restart = False
main_config = files.template(
src=importlib.resources.files(__package__).joinpath("nginx/nginx.conf.j2"),
src=importlib.resources.files(__package__).joinpath("nginx.conf.j2"),
dest="/etc/nginx/nginx.conf",
user="root",
group="root",
@@ -306,7 +201,7 @@ def _configure_nginx(domain: str, debug: bool = False) -> bool:
need_restart |= main_config.changed
autoconfig = files.template(
src=importlib.resources.files(__package__).joinpath("nginx/autoconfig.xml.j2"),
src=importlib.resources.files(__package__).joinpath("autoconfig.xml.j2"),
dest="/var/www/html/.well-known/autoconfig/mail/config-v1.1.xml",
user="root",
group="root",
@@ -315,50 +210,9 @@ def _configure_nginx(domain: str, debug: bool = False) -> bool:
)
need_restart |= autoconfig.changed
mta_sts_config = files.template(
src=importlib.resources.files(__package__).joinpath("nginx/mta-sts.txt.j2"),
dest="/var/www/html/.well-known/mta-sts.txt",
user="root",
group="root",
mode="644",
config={"domain_name": domain},
)
need_restart |= mta_sts_config.changed
# install CGI newemail script
#
cgi_dir = "/usr/lib/cgi-bin"
files.directory(
name=f"Ensure {cgi_dir} exists",
path=cgi_dir,
user="root",
group="root",
)
files.put(
name="Upload cgi newemail.py script",
src=importlib.resources.files("chatmaild").joinpath("newemail.py").open("rb"),
dest=f"{cgi_dir}/newemail.py",
user="root",
group="root",
mode="755",
)
return need_restart
def check_config(config):
mailname = config.mailname
if mailname != "testrun.org" and not mailname.endswith(".testrun.org"):
blocked_words = "merlinux schmieder testrun.org".split()
for value in config.__dict__.values():
if any(x in value for x in blocked_words):
raise ValueError(
f"please set your own privacy contacts/addresses in {config._inipath}"
)
return config
def deploy_chatmail(mail_domain: str, mail_server: str, dkim_selector: str) -> None:
"""Deploy a chat-mail instance.
@@ -366,7 +220,6 @@ def deploy_chatmail(mail_domain: str, mail_server: str, dkim_selector: str) -> N
:param mail_server: the DNS name under which your mail server is reachable
:param dkim_selector:
"""
from .www import build_webpages
apt.update(name="apt update", cache_time=24 * 3600)
server.group(name="Create vmail group", group="vmail", system=True)
@@ -381,7 +234,7 @@ def deploy_chatmail(mail_domain: str, mail_server: str, dkim_selector: str) -> N
)
# Deploy acmetool to have TLS certificates.
deploy_acmetool(nginx_hook=True, domains=[mail_server, f"mta-sts.{mail_server}"])
deploy_acmetool(nginx_hook=True, domains=[mail_server])
apt.packages(
name="Install Postfix",
@@ -406,28 +259,11 @@ def deploy_chatmail(mail_domain: str, mail_server: str, dkim_selector: str) -> N
packages=["nginx"],
)
apt.packages(
name="Install fcgiwrap",
packages=["fcgiwrap"],
)
pkg_root = importlib.resources.files(__package__)
chatmail_ini = pkg_root.joinpath("../../../chatmail.ini").resolve()
config = read_config(chatmail_ini, mailname=mail_domain)
check_config(config)
www_path = pkg_root.joinpath("../../../www").resolve()
build_dir = www_path.joinpath("build")
src_dir = www_path.joinpath("src")
build_webpages(src_dir, build_dir, config)
files.rsync(f"{build_dir}/", "/var/www/html", flags=["-avz"])
_install_remote_venv_with_chatmaild(config)
_install_chatmaild()
debug = False
dovecot_need_restart = _configure_dovecot(mail_server, debug=debug)
postfix_need_restart = _configure_postfix(config, debug=debug)
postfix_need_restart = _configure_postfix(mail_domain, debug=debug)
opendkim_need_restart = _configure_opendkim(mail_domain, dkim_selector)
mta_sts_need_restart = _install_mta_sts_daemon()
nginx_need_restart = _configure_nginx(mail_domain)
systemd.service(
@@ -438,15 +274,6 @@ def deploy_chatmail(mail_domain: str, mail_server: str, dkim_selector: str) -> N
restarted=opendkim_need_restart,
)
systemd.service(
name="Start and enable MTA-STS daemon",
service="mta-sts-daemon.service",
daemon_reload=True,
running=True,
enabled=True,
restarted=mta_sts_need_restart,
)
systemd.service(
name="Start and enable Postfix",
service="postfix.service",

View File

@@ -46,7 +46,8 @@ def deploy_acmetool(nginx_hook=False, email="", domains=[]):
mode="644",
)
server.shell(
name=f"Request certificate for: { ', '.join(domains) }",
commands=[f"acmetool want { ' '.join(domains)}"],
)
for domain in domains:
server.shell(
name=f"Request certificate for {domain}",
commands=[f"acmetool want {domain}"],
)

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View File

@@ -19,7 +19,7 @@ mail_plugins = quota
# these are the capabilities Delta Chat cares about actually
# so let's keep the network overhead per login small
# https://github.com/deltachat/deltachat-core-rust/blob/master/src/imap/capabilities.rs
imap_capability = IMAP4rev1 IDLE MOVE QUOTA CONDSTORE NOTIFY
imap_capability = IMAP4rev1 IDLE MOVE QUOTA CONDSTORE
# Authentication for system users.
@@ -118,24 +118,6 @@ service auth-worker {
user = vmail
}
service imap-login {
# High-security mode.
# Each process serves a single connection and exits afterwards.
# This is the default, but we set it explicitly to be sure.
# See <https://doc.dovecot.org/admin_manual/login_processes/#high-security-mode> for details.
service_count = 1
# Inrease the number of simultaneous connections.
#
# As of Dovecot 2.3.19.1 the default is 100 processes.
# Combined with `service_count = 1` it means only 100 connections
# can be handled simultaneously.
process_limit = 10000
# Avoid startup latency for new connections.
process_min_avail = 10
}
ssl = required
ssl_cert = </var/lib/acme/live/{{ config.hostname }}/fullchain
ssl_key = </var/lib/acme/live/{{ config.hostname }}/privkey

View File

@@ -1,87 +0,0 @@
import importlib
import qrcode
import os
from PIL import ImageFont, ImageDraw, Image
import io
def gen_qr_png_data(maildomain):
url = f"DCACCOUNT:https://{maildomain}/cgi-bin/newemail.py"
image = gen_qr(maildomain, url)
temp = io.BytesIO()
image.save(temp, format="png")
temp.seek(0)
return temp
def gen_qr(maildomain, url):
# taken and modified from
# https://github.com/deltachat/mailadm/blob/master/src/mailadm/gen_qr.py
# info = f"{maildomain} invite code"
info = ""
# load QR code
qr = qrcode.QRCode(
version=1,
error_correction=qrcode.constants.ERROR_CORRECT_H,
box_size=1,
border=1,
)
qr.add_data(url)
qr.make(fit=True)
qr_img = qr.make_image(fill_color="black", back_color="white")
# paint all elements
ttf_path = str(
importlib.resources.files(__package__).joinpath("data/opensans-regular.ttf")
)
logo_red_path = str(
importlib.resources.files(__package__).joinpath("data/delta-chat-bw.png")
)
assert os.path.exists(ttf_path), ttf_path
font_size = 16
font = ImageFont.truetype(font=ttf_path, size=font_size)
num_lines = ((info).count("\n") + 1) if info else 0
size = width = 384
qr_padding = 6
text_height = font_size * num_lines
height = size + text_height
image = Image.new("RGBA", (width, height), "white")
qr_final_size = width - (qr_padding * 2)
if num_lines:
draw = ImageDraw.Draw(image)
# draw text
if hasattr(font, "getsize"):
info_pos = (width - font.getsize(info.strip())[0]) // 2
else:
info_pos = (width - font.getbbox(info.strip())[3]) // 2
draw.multiline_text(
(info_pos, size - qr_padding // 2),
info,
font=font,
fill="black",
align="right",
)
# paste QR code
image.paste(
qr_img.resize((qr_final_size, qr_final_size), resample=Image.NEAREST),
(qr_padding, qr_padding),
)
# background delta logo
logo2_img = Image.open(logo_red_path)
logo2_width = int(size / 6)
logo2 = logo2_img.resize((logo2_width, logo2_width), resample=Image.NEAREST)
pos = int((size / 2) - (logo2_width / 2))
image.paste(logo2, (pos, pos), mask=logo2)
return image

View File

@@ -26,6 +26,8 @@ http {
gzip on;
server {
listen 80 default_server;
listen [::]:80 default_server;
listen 443 ssl default_server;
listen [::]:443 ssl default_server;
@@ -40,16 +42,6 @@ http {
# as directory, then fall back to displaying a 404.
try_files $uri $uri/ =404;
}
# add cgi-bin support
include /usr/share/doc/fcgiwrap/examples/nginx.conf;
}
server {
listen 80 default_server;
listen [::]:80 default_server;
server_name _;
return 301 https://$host$request_uri;
}
}

View File

@@ -1,4 +0,0 @@
version: STSv1
mode: enforce
mx: {{ config.domain_name }}
max_age: 2419200

View File

@@ -20,7 +20,7 @@ Domain {{ config.domain_name }}
Selector {{ config.opendkim_selector }}
KeyFile /etc/dkimkeys/{{ config.opendkim_selector }}.private
KeyTable /etc/dkimkeys/KeyTable
SigningTable refile:/etc/dkimkeys/SigningTable
SigningTable /etc/dkimkeys/SigningTable
# In Debian, opendkim runs as user "opendkim". A umask of 007 is required when
# using a local socket with MTAs that access the socket as a non-privileged

View File

@@ -1,4 +1,4 @@
myorigin = {{ config.mailname }}
myorigin = {{ config.domain_name }}
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
biff = no
@@ -16,17 +16,16 @@ readme_directory = no
compatibility_level = 2
# TLS parameters
smtpd_tls_cert_file=/var/lib/acme/live/{{ config.mailname }}/fullchain
smtpd_tls_key_file=/var/lib/acme/live/{{ config.mailname }}/privkey
smtpd_tls_cert_file=/var/lib/acme/live/{{ config.domain_name }}/fullchain
smtpd_tls_key_file=/var/lib/acme/live/{{ config.domain_name }}/privkey
smtpd_tls_security_level=may
smtp_tls_CApath=/etc/ssl/certs
smtp_tls_security_level=may
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtp_tls_policy_maps = socketmap:inet:127.0.0.1:8461:postfix
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
myhostname = {{ config.mailname }}
myhostname = {{ config.domain_name }}
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
@@ -45,7 +44,7 @@ inet_interfaces = all
inet_protocols = all
virtual_transport = lmtp:unix:private/dovecot-lmtp
virtual_mailbox_domains = {{ config.mailname }}
virtual_mailbox_domains = {{ config.domain_name }}
smtpd_milters = unix:opendkim/opendkim.sock
non_smtpd_milters = $smtpd_milters

View File

@@ -32,8 +32,7 @@ submission inet n - y - - smtpd
-o smtpd_recipient_restrictions=
-o smtpd_relay_restrictions=permit_sasl_authenticated,reject
-o milter_macro_daemon_name=ORIGINATING
-o smtpd_client_connection_count_limit=1000
-o smtpd_proxy_filter=127.0.0.1:{{ config.filtermail_smtp_port }}
-o smtpd_proxy_filter=127.0.0.1:10080
smtps inet n - y - - smtpd
-o syslog_name=postfix/smtps
-o smtpd_tls_wrappermode=yes
@@ -47,9 +46,8 @@ smtps inet n - y - - smtpd
-o smtpd_sender_restrictions=$mua_sender_restrictions
-o smtpd_recipient_restrictions=
-o smtpd_relay_restrictions=permit_sasl_authenticated,reject
-o smtpd_client_connection_count_limit=1000
-o milter_macro_daemon_name=ORIGINATING
-o smtpd_proxy_filter=127.0.0.1:{{ config.filtermail_smtp_port }}
-o smtpd_proxy_filter=127.0.0.1:10080
#628 inet n - y - - qmqpd
pickup unix n - y 60 1 pickup
cleanup unix n - y - 0 cleanup
@@ -78,5 +76,5 @@ scache unix - - y - 1 scache
postlog unix-dgram n - n - 1 postlogd
filter unix - n n - - lmtp
# Local SMTP server for reinjecting filered mail.
localhost:{{ config.postfix_reinject_port }} inet n - n - 10 smtpd
localhost:10025 inet n - n - 10 smtpd
-o syslog_name=postfix/reinject

View File

@@ -1,10 +0,0 @@
[Unit]
Description=Postfix MTA-STS resolver daemon
[Service]
ExecStart=/usr/local/lib/postfix-mta-sts-resolver/bin/mta-sts-daemon
Restart=always
RestartSec=30
[Install]
WantedBy=multi-user.target

View File

@@ -1,13 +0,0 @@
host: 127.0.0.1
port: 8461
reuse_port: true
shutdown_timeout: 20
cache:
type: internal
options:
cache_size: 10000
proactive_policy_fetching:
enabled: true
default_zone:
strict_testing: false
timeout: 4

View File

@@ -1,110 +0,0 @@
import importlib.resources
import webbrowser
import hashlib
import time
import traceback
import markdown
from jinja2 import Template
from .genqr import gen_qr_png_data
from chatmaild.config import read_config
def snapshot_dir_stats(somedir):
d = {}
for path in somedir.iterdir():
if path.is_file() and path.name[0] != "." and path.suffix != ".swp":
mtime = path.stat().st_mtime
hash = hashlib.md5(path.read_bytes()).hexdigest()
d[path] = (mtime, hash)
return d
def prepare_template(source):
assert source.exists(), source
render_vars = {}
render_vars["pagename"] = "home" if source.stem == "index" else source.stem
render_vars["markdown_html"] = markdown.markdown(source.read_text())
page_layout = source.with_name("page-layout.html").read_text()
return render_vars, page_layout
def build_webpages(src_dir, build_dir, config):
try:
_build_webpages(src_dir, build_dir, config)
except Exception:
print(traceback.format_exc())
def _build_webpages(src_dir, build_dir, config):
mail_domain = config.mailname
assert src_dir.exists(), src_dir
if not build_dir.exists():
build_dir.mkdir()
qr_path = build_dir.joinpath(f"qr-chatmail-invite-{mail_domain}.png")
qr_path.write_bytes(gen_qr_png_data(mail_domain).read())
for path in src_dir.iterdir():
if path.suffix == ".md":
render_vars, content = prepare_template(path)
target = build_dir.joinpath(path.stem + ".html")
# recursive jinja2 rendering
while 1:
new = Template(content).render(config=config, **render_vars)
if new == content:
break
content = new
with target.open("w") as f:
f.write(content)
elif path.name != "page-layout.html":
target = build_dir.joinpath(path.name)
target.write_bytes(path.read_bytes())
return build_dir
def main():
chatmail_domain = "example.testrun.org"
path = importlib.resources.files(__package__)
reporoot = path.joinpath("../../../").resolve()
inipath = reporoot.joinpath("chatmail.ini")
config = read_config(inipath, mailname=chatmail_domain)
config["webdev"] = True
www_path = reporoot.joinpath("www")
src_path = www_path.joinpath("src")
stats = None
build_dir = www_path.joinpath("build")
src_dir = www_path.joinpath("src")
index_path = build_dir.joinpath("index.html")
# start web page generation, open a browser and wait for changes
build_webpages(src_dir, build_dir, config)
webbrowser.open(str(index_path))
stats = snapshot_dir_stats(src_path)
print(f"\nOpened URL: file://{index_path.resolve()}\n")
print(f"watching {src_path} directory for changes")
changenum = 0
for count in range(0, 1000000):
newstats = snapshot_dir_stats(src_path)
if newstats == stats and count % 60 != 0:
count += 1
time.sleep(1.0)
continue
for key in newstats:
if stats[key] != newstats[key]:
print(f"*** CHANGED: {key}")
changenum += 1
stats = newstats
build_webpages(src_dir, build_dir, config)
print(f"[{changenum}] regenerated web pages at: {index_path}")
print(f"URL: file://{index_path.resolve()}\n\n")
count = 0
if __name__ == "__main__":
main()

View File

@@ -1,4 +1,4 @@
#!/bin/bash
set -e
venv/bin/pytest tests/online/benchmark.py -vrx
online-tests/venv/bin/pytest online-tests/benchmark.py -vrx

View File

@@ -4,5 +4,12 @@ echo -----------------------------------------
echo deploying to $CHATMAIL_DOMAIN
echo -----------------------------------------
echo WARNING: in five seconds deploy to $CHATMAIL_DOMAIN starts
sleep 5
venv/bin/python3 -m build -n --sdist chatmaild --outdir dist
venv/bin/pyinfra --ssh-user root "$CHATMAIL_DOMAIN" \
deploy-chatmail/src/deploy_chatmail/deploy.py
rm -r dist/

View File

@@ -15,9 +15,6 @@ _submission._tcp.$CHATMAIL_DOMAIN. SRV 0 1 587 $CHATMAIL_DOMAIN.
_submissions._tcp.$CHATMAIL_DOMAIN. SRV 0 1 465 $CHATMAIL_DOMAIN.
_imap._tcp.$CHATMAIL_DOMAIN. SRV 0 1 143 $CHATMAIL_DOMAIN.
_imaps._tcp.$CHATMAIL_DOMAIN. SRV 0 1 993 $CHATMAIL_DOMAIN.
$CHATMAIL_DOMAIN. IN CAA 128 issue "letsencrypt.org;accounturi=$ACME_ACCOUNT_URL"
_mta-sts.$CHATMAIL_DOMAIN. IN TXT "v=STSv1; id=$(date -u '+%Y%m%d%H%M')"
mta-sts.$CHATMAIL_DOMAIN. IN CNAME $CHATMAIL_DOMAIN.
_smtp._tls.$CHATMAIL_DOMAIN. IN TXT "v=TLSRPTv1;rua=mailto:$EMAIL"
$CHATMAIL_DOMAIN. IN CAA 0 issue "letsencrypt.org; accounturi=$ACME_ACCOUNT_URL"
EOF
$SSH opendkim-genzone -F | sed 's/^;.*$//;/^$/d'

View File

@@ -3,6 +3,6 @@ set -e
python3 -m venv venv
pip=venv/bin/pip
$pip install pyinfra pytest build 'setuptools>=68' tox
$pip install pyinfra pytest build 'setuptools>=68' tox deltachat
$pip install -e deploy-chatmail
$pip install -e chatmaild

View File

@@ -1,4 +1,4 @@
#!/bin/bash
venv/bin/tox -c chatmaild
venv/bin/tox -c deploy-chatmail
venv/bin/pytest tests/online -rs -vrx --durations=5 $@
venv/bin/pytest tests/online -vrx --durations=5 $@

View File

@@ -1,9 +0,0 @@
#!/usr/bin/env bash
echo -----------------------------------------
echo starting local webdev
echo -----------------------------------------
venv/bin/python3 -m deploy_chatmail.www

View File

@@ -1,88 +0,0 @@
from chatmaild.config import read_config
import chatmaild.config
def test_read_config_without_mailname(tmp_path, create_ini, monkeypatch):
mailname_path = tmp_path.joinpath("mailname")
mailname_path.write_text("something.example.org")
monkeypatch.setattr(chatmaild.config, "system_mailname_path", mailname_path)
inipath = create_ini(
"""
[params]
max_user_send_per_minute = 40
filtermail_smtp_port = 9875
postfix_reinject_port = 9999
passthrough_recipients =
"""
)
config = read_config(inipath)
assert config.mailname == "something.example.org"
def test_read_config_without_privacy_policy(tmp_path, create_ini):
inipath = create_ini(
"""
[params]
max_user_send_per_minute = 40
filtermail_smtp_port = 9875
postfix_reinject_port = 9999
passthrough_recipients =
[privacy:testrun]
domain = *.example.org
"""
)
config = read_config(inipath, "something.example.org")
assert config.mailname == "something.example.org"
assert config.max_user_send_per_minute == 40
assert config.filtermail_smtp_port == 9875
assert config.postfix_reinject_port == 9999
assert config.passthrough_recipients == []
assert not config.privacy_postal
assert not config.privacy_mail
assert not config.privacy_pdo
assert not config.privacy_supervisor
def test_read_config(create_ini):
inipath = create_ini(
"""
[params]
max_user_send_per_minute = 40
filtermail_smtp_port = 10080
postfix_reinject_port = 10025
passthrough_recipients = x@example.org y@example.org
[privacy:testrun]
domain = *.testrun.org
privacy_postal =
Postal Ltd
privacy_mail = privacy@merlinux.eu
privacy_pdo =
Postal PDO
You can contact him at *delta-privacy@merlinux.eu* (Keyword: DPO)
privacy_supervisor =
line1
line2 with space
"""
)
config = read_config(inipath, "something.testrun.org")
assert config.mailname == "something.testrun.org"
assert config.filtermail_smtp_port == 10080
assert config.postfix_reinject_port == 10025
assert config.passthrough_recipients == ["x@example.org", "y@example.org"]
assert config.privacy_postal == "Postal Ltd"
assert config.privacy_mail == "privacy@merlinux.eu"
lines = config.privacy_pdo.split("\n")
assert lines[0] == "Postal PDO"
assert lines[1].startswith("You can ")
lines = config.privacy_supervisor.split("\n")
assert lines[0] == "line1"
assert lines[1] == "line2 with space"

View File

@@ -0,0 +1,53 @@
import os
import pytest
import chatmaild.dictproxy
from chatmaild.dictproxy import get_user_data, lookup_passdb
from chatmaild.database import Database, DBError
@pytest.fixture()
def db(tmpdir):
db_path = tmpdir / "passdb.sqlite"
print("database path:", db_path)
return Database(db_path)
def test_basic(db):
chatmaild.dictproxy.NOCREATE_FILE = "/tmp/nocreate"
if os.path.exists(chatmaild.dictproxy.NOCREATE_FILE):
os.remove(chatmaild.dictproxy.NOCREATE_FILE)
lookup_passdb(db, "link2xt@c1.testrun.org", "asdf")
data = get_user_data(db, "link2xt@c1.testrun.org")
assert data
def test_dont_overwrite_password_on_wrong_login(db):
"""Test that logging in with a different password doesn't create a new user"""
res = lookup_passdb(db, "newuser1@something.org", "kajdlkajsldk12l3kj1983")
assert res["password"]
res2 = lookup_passdb(db, "newuser1@something.org", "kajdlqweqwe")
# this function always returns a password hash, which is actually compared by dovecot.
assert res["password"] == res2["password"]
def test_nocreate_file(db):
chatmaild.dictproxy.NOCREATE_FILE = "/tmp/nocreate"
with open(chatmaild.dictproxy.NOCREATE_FILE, "w+") as f:
f.write("")
assert os.path.exists(chatmaild.dictproxy.NOCREATE_FILE)
lookup_passdb(db, "newuser1@something.org", "kajdlqweqwe")
assert not get_user_data(db, "newuser1@something.org")
os.remove(chatmaild.dictproxy.NOCREATE_FILE)
def test_db_version(db):
assert db.get_schema_version() == 1
def test_too_high_db_version(db):
with db.write_transaction() as conn:
conn.execute("PRAGMA user_version=%s;" % (999,))
with pytest.raises(DBError):
db.ensure_tables()

View File

@@ -1,89 +0,0 @@
import json
import pytest
import threading
import queue
import traceback
import chatmaild.doveauth
from chatmaild.doveauth import get_user_data, lookup_passdb, handle_dovecot_request
from chatmaild.database import DBError
def test_basic(db):
lookup_passdb(db, "link2xt@c1.testrun.org", "Pieg9aeToe3eghuthe5u")
data = get_user_data(db, "link2xt@c1.testrun.org")
assert data
data2 = lookup_passdb(db, "link2xt@c1.testrun.org", "Pieg9aeToe3eghuthe5u")
assert data == data2
def test_dont_overwrite_password_on_wrong_login(db):
"""Test that logging in with a different password doesn't create a new user"""
res = lookup_passdb(db, "newuser1@something.org", "kajdlkajsldk12l3kj1983")
assert res["password"]
res2 = lookup_passdb(db, "newuser1@something.org", "kajdlqweqwe")
# this function always returns a password hash, which is actually compared by dovecot.
assert res["password"] == res2["password"]
def test_nocreate_file(db, monkeypatch, tmpdir):
p = tmpdir.join("nocreate")
p.write("")
monkeypatch.setattr(chatmaild.doveauth, "NOCREATE_FILE", str(p))
lookup_passdb(db, "newuser1@something.org", "zequ0Aimuchoodaechik")
assert not get_user_data(db, "newuser1@something.org")
def test_db_version(db):
assert db.get_schema_version() == 1
def test_too_high_db_version(db):
with db.write_transaction() as conn:
conn.execute("PRAGMA user_version=%s;" % (999,))
with pytest.raises(DBError):
db.ensure_tables()
def test_handle_dovecot_request(db):
msg = (
"Lshared/passdb/laksjdlaksjdlaksjdlk12j3l1k2j3123/"
"some42@c3.testrun.org\tsome42@c3.testrun.org"
)
res = handle_dovecot_request(msg, db, "c3.testrun.org")
assert res
assert res[0] == "O" and res.endswith("\n")
userdata = json.loads(res[1:].strip())
assert userdata["home"] == "/home/vmail/some42@c3.testrun.org"
assert userdata["uid"] == userdata["gid"] == "vmail"
assert userdata["password"].startswith("{SHA512-CRYPT}")
def test_100_concurrent_lookups_different_accounts(db, gencreds):
num_threads = 100
req_per_thread = 5
results = queue.Queue()
def lookup(db):
for i in range(req_per_thread):
addr, password = gencreds()
try:
lookup_passdb(db, addr, password)
except Exception:
results.put(traceback.format_exc())
else:
results.put(None)
threads = []
for i in range(num_threads):
thread = threading.Thread(target=lookup, args=(db,), daemon=True)
threads.append(thread)
print(f"created {num_threads} threads, starting them and waiting for results")
for thread in threads:
thread.start()
for i in range(num_threads * req_per_thread):
res = results.get()
if res is not None:
pytest.fail(f"concurrent lookup failed\n{res}")

View File

@@ -1,12 +1,4 @@
from chatmaild.filtermail import (
check_encrypted,
BeforeQueueHandler,
SendRateLimiter,
check_mdn,
)
from chatmaild.config import read_config
from chatmaild.filtermail import check_encrypted, check_DATA, SendRateLimiter, check_mdn
import pytest
@@ -16,25 +8,18 @@ def maildomain():
return "chatmail.example.org"
@pytest.fixture
def handler(create_ini, maildomain):
config = read_config(create_ini(), maildomain)
return BeforeQueueHandler(config)
def test_reject_forged_from(maildata, gencreds, handler):
def test_reject_forged_from(maildata, gencreds):
class env:
mail_from = gencreds()[0]
rcpt_tos = [gencreds()[0]]
# test that the filter lets good mail through
env.content = maildata("plain.eml", from_addr=env.mail_from).as_bytes()
assert not handler.check_DATA(envelope=env)
assert not check_DATA(envelope=env)
# test that the filter rejects forged mail
env.content = maildata("plain.eml", from_addr="forged@c3.testrun.org").as_bytes()
error = handler.check_DATA(envelope=env)
error = check_DATA(envelope=env)
assert "500" in error
@@ -56,7 +41,7 @@ def test_filtermail_encryption_detection(maildata):
assert not check_encrypted(msg)
def test_filtermail_is_mdn(maildata, gencreds, handler):
def test_filtermail_is_mdn(maildata, gencreds):
from_addr = gencreds()[0]
to_addr = gencreds()[0] + ".other"
msg = maildata("mdn.eml", from_addr, to_addr)
@@ -68,8 +53,7 @@ def test_filtermail_is_mdn(maildata, gencreds, handler):
assert check_mdn(msg, env)
print(msg.as_string())
assert not handler.check_DATA(env)
assert not check_DATA(env)
def test_filtermail_to_multiple_recipients_no_mdn(maildata, gencreds):
@@ -89,35 +73,10 @@ def test_filtermail_to_multiple_recipients_no_mdn(maildata, gencreds):
def test_send_rate_limiter():
limiter = SendRateLimiter()
for i in range(100):
if limiter.is_sending_allowed("some@example.org", 10):
if i <= 10:
if limiter.is_sending_allowed("some@example.org"):
if i <= SendRateLimiter.MAX_USER_SEND_PER_MINUTE:
continue
pytest.fail("limiter didn't work")
else:
assert i == 11
assert i == SendRateLimiter.MAX_USER_SEND_PER_MINUTE + 1
break
def test_excempt_privacy(maildata, gencreds, handler):
from_addr = gencreds()[0]
to_addr = "privacy@testrun.org"
false_to = "privacy@tstrn.org"
false_to2 = "prvcy@testrun.org"
assert to_addr in handler.config.passthrough_recipients
msg = maildata("plain.eml", from_addr, to_addr)
class env:
mail_from = from_addr
rcpt_tos = [to_addr]
content = msg.as_bytes()
# assert that None/no error is returned
assert not handler.check_DATA(envelope=env)
class env2:
mail_from = from_addr
rcpt_tos = [to_addr, false_to, false_to2]
content = msg.as_bytes()
assert "500" in handler.check_DATA(envelope=env2)

View File

@@ -1,29 +0,0 @@
import json
import chatmaild
from chatmaild.newemail import create_newemail_dict, print_new_account
def test_create_newemail_dict():
ac1 = create_newemail_dict(domain="example.org")
assert "@" in ac1["email"]
assert len(ac1["password"]) >= 10
ac2 = create_newemail_dict(domain="example.org")
assert ac1["email"] != ac2["email"]
assert ac1["password"] != ac2["password"]
def test_print_new_account(capsys, monkeypatch, maildomain, tmpdir):
p = tmpdir.join("mailname")
p.write(maildomain)
monkeypatch.setattr(chatmaild.newemail, "mailname_path", str(p))
print_new_account()
out, err = capsys.readouterr()
lines = out.split("\n")
assert lines[0] == "Content-Type: application/json"
assert not lines[1]
dic = json.loads(lines[2])
assert dic["email"].endswith(f"@{maildomain}")
assert len(dic["password"]) >= 10

View File

@@ -3,18 +3,15 @@ import io
import time
import random
import subprocess
import textwrap
import imaplib
import smtplib
import importlib.resources
import itertools
from email.parser import BytesParser
from email import policy
from pathlib import Path
from math import ceil
import pytest
from chatmaild.database import Database
conftestdir = Path(__file__).parent
@@ -39,14 +36,6 @@ def pytest_runtest_setup(item):
pytest.skip("skipping slow test, use --slow to run")
@pytest.fixture
def inipath():
dpath = importlib.resources.files("chatmaild")
inipath = dpath.joinpath("../../../chatmail.ini").resolve()
assert inipath.exists()
return inipath
@pytest.fixture
def maildomain():
domain = os.environ.get("CHATMAIL_DOMAIN")
@@ -82,7 +71,7 @@ def pytest_report_header():
@pytest.fixture
def benchmark(request):
def bench(func, num, name=None, reportfunc=None):
def bench(func, num, name=None):
if name is None:
name = func.__name__
durations = []
@@ -91,7 +80,7 @@ def benchmark(request):
func()
durations.append(time.time() - now)
durations.sort()
request.config._benchresults[name] = (reportfunc, durations)
request.config._benchresults[name] = durations
return bench
@@ -112,9 +101,7 @@ def pytest_terminal_summary(terminalreporter):
headers = f"{'benchmark name': <30} " + fcol(float_names)
tr.write_line(headers)
tr.write_line("-" * len(headers))
summary_lines = []
for name, (reportfunc, durations) in results.items():
for name, durations in results.items():
measures = [
sorted(durations)[len(durations) // 2],
min(durations),
@@ -123,16 +110,6 @@ def pytest_terminal_summary(terminalreporter):
line = f"{name: <30} "
line += fcol(f"{float: 2.2f}" for float in measures)
tr.write_line(line)
vmedian, vmin, vmax = measures
if reportfunc:
for line in reportfunc(vmin=vmin, vmedian=vmedian, vmax=vmax):
summary_lines.append(line)
if summary_lines:
tr.write_line("")
tr.section("benchmark summary measures")
for line in summary_lines:
tr.write_line(line)
@pytest.fixture
@@ -140,16 +117,6 @@ def imap(maildomain):
return ImapConn(maildomain)
@pytest.fixture
def make_imap_connection(maildomain):
def make_imap_connection():
conn = ImapConn(maildomain)
conn.connect()
return conn
return make_imap_connection
class ImapConn:
AuthError = imaplib.IMAP4.error
logcmd = "journalctl -f -u dovecot"
@@ -190,16 +157,6 @@ def smtp(maildomain):
return SmtpConn(maildomain)
@pytest.fixture
def make_smtp_connection(maildomain):
def make_smtp_connection():
conn = SmtpConn(maildomain)
conn.connect()
return conn
return make_smtp_connection
class SmtpConn:
AuthError = smtplib.SMTPAuthenticationError
logcmd = "journalctl -f -t postfix/smtpd -t postfix/smtp -t postfix/lmtp"
@@ -238,20 +195,13 @@ def gencreds(maildomain):
num = next(count)
alphanumeric = "abcdefghijklmnopqrstuvwxyz1234567890"
user = "".join(random.choices(alphanumeric, k=10))
user = f"ac{num}_{user}"[:9]
password = "".join(random.choices(alphanumeric, k=12))
user = f"ac{num}_{user}"
password = "".join(random.choices(alphanumeric, k=10))
yield f"{user}@{domain}", f"{password}"
return lambda domain=None: next(gen(domain))
@pytest.fixture()
def db(tmpdir):
db_path = tmpdir / "passdb.sqlite"
print("database path:", db_path)
return Database(db_path)
#
# Delta Chat testplugin re-use
# use the cmfactory fixture to get chatmail instance accounts
@@ -288,13 +238,11 @@ class ChatmailTestProcess:
@pytest.fixture
def cmfactory(request, gencreds, tmpdir, maildomain):
def cmfactory(request, gencreds, tmpdir, data, maildomain):
# cloned from deltachat.testplugin.amfactory
pytest.importorskip("deltachat")
from deltachat.testplugin import ACFactory
data = request.getfixturevalue("data")
testproc = ChatmailTestProcess(request.config, maildomain, gencreds)
am = ACFactory(request=request, tmpdir=tmpdir, testprocess=testproc, data=data)
@@ -324,7 +272,7 @@ class Remote:
self.sshdomain = sshdomain
def iter_output(self, logcmd=""):
getjournal = "journalctl -f" if not logcmd else logcmd
getjournal = f"journalctl -f" if not logcmd else logcmd
self.popen = subprocess.Popen(
["ssh", f"root@{self.sshdomain}", getjournal],
stdout=subprocess.PIPE,
@@ -338,18 +286,6 @@ class Remote:
break
@pytest.fixture
def lp(request):
class LP:
def sec(self, msg):
print(f"---- {msg} ----")
def indent(self, msg):
print(f" {msg}")
return LP()
@pytest.fixture
def maildata(request, gencreds):
datadir = conftestdir.joinpath("mail-data")
@@ -412,16 +348,3 @@ class CMUser:
imap.login(self.addr, self.password)
self._imap = imap
return self._imap
@pytest.fixture
def create_ini(tmp_path, inipath):
def create_ini_func(source=None):
if source is None:
source = inipath.read_text()
p = tmp_path.joinpath("chatmail.ini")
assert not p.exists(), p
p.write_text(textwrap.dedent(source))
return p
return create_ini_func

View File

@@ -1,6 +1,5 @@
import pytest
import threading
import queue
import smtplib
def test_login_basic_functioning(imap_or_smtp, gencreds, lp):
@@ -24,11 +23,6 @@ def test_login_basic_functioning(imap_or_smtp, gencreds, lp):
with pytest.raises(imap_or_smtp.AuthError):
imap_or_smtp.login(user, password + "wrong")
lp.sec("creating users with a short password is not allowed")
user, _password = gencreds()
with pytest.raises(imap_or_smtp.AuthError):
imap_or_smtp.login(user, "admin")
def test_login_same_password(imap_or_smtp, gencreds):
"""Test two different users logging in with the same password
@@ -41,30 +35,3 @@ def test_login_same_password(imap_or_smtp, gencreds):
imap_or_smtp.login(user1, password1)
imap_or_smtp.connect()
imap_or_smtp.login(user2, password1)
def test_concurrent_logins_same_account(
make_imap_connection, make_smtp_connection, gencreds
):
"""Test concurrent smtp and imap logins
and check remote server succeeds on each connection.
"""
user1, password1 = gencreds()
login_results = queue.Queue()
def login_smtp_imap(smtp, imap):
try:
imap.login(user1, password1)
except Exception:
login_results.put(False)
else:
login_results.put(True)
conns = [(make_smtp_connection(), make_imap_connection()) for i in range(10)]
for args in conns:
thread = threading.Thread(target=login_smtp_imap, args=args, daemon=True)
thread.start()
for _ in conns:
assert login_results.get()

View File

@@ -1,6 +0,0 @@
from deploy_chatmail.genqr import gen_qr_png_data
def test_gen_qr_png_data(maildomain):
data = gen_qr_png_data(maildomain)
assert data

View File

@@ -54,7 +54,7 @@ def test_exceed_rate_limit(cmsetup, gencreds, maildata):
try:
user1.smtp.sendmail(user1.addr, [user2.addr], mail)
except smtplib.SMTPException as e:
if i < 60:
if i < 80:
pytest.fail(f"rate limit was exceeded too early with msg {i}")
outcome = e.recipients[user2.addr]
assert outcome[0] == 450

View File

@@ -91,7 +91,7 @@ class TestEndToEndDeltaChat:
lp.sec("setup encrypted comms between ac1 and ac2 on different instances")
qr = ac1.get_setup_contact_qr()
ac2.qr_setup_contact(qr)
ch = ac2.qr_setup_contact(qr)
msg = ac2.wait_next_incoming_message()
assert "verified" in msg.text

View File

@@ -1,48 +0,0 @@
import textwrap
import importlib.resources
from deploy_chatmail.www import build_webpages
from chatmaild.config import read_config
def make_config(create_ini, domain="example.org"):
inipath = create_ini(
textwrap.dedent(
f"""\
[params]
max_user_send_per_minute = 60
filtermail_smtp_port = 10080
postfix_reinject_port = 10025
passthrough_recipients =
[privacy:{domain}]
domain = example.org
privacy_postal =
address-line1
address-line2
privacy_mail = privacy@{domain}
privacy_pdo =
address-line3
"""
)
)
return read_config(inipath, domain)
def test_build_webpages(tmp_path, create_ini):
pkgroot = importlib.resources.files("deploy_chatmail")
src_dir = pkgroot.joinpath("../../../www/src").resolve()
assert src_dir.exists(), src_dir
config = make_config(create_ini, "example.org")
build_dir = tmp_path.joinpath("build")
build_webpages(src_dir, build_dir, config)
def test_get_settings(tmp_path, create_ini):
config = make_config(create_ini, "example.org")
assert config.privacy_postal == "address-line1\naddress-line2"
assert config.privacy_mail == "privacy@example.org"
assert config.privacy_pdo == "address-line3"
assert config.mailname == "example.org"

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@@ -1,19 +0,0 @@
<img width="800px" src="collage-top.png"/>
## Dear [Delta Chat](https://get.delta.chat) users and newcomers,
Welcome to instant, interoperable and [privacy-preserving](privacy.html) messaging :)
👉 **Tap** or scan this QR code to get a random `@{{config.mail_domain}}` e-mail address
<a href="DCACCOUNT:https://{{ config.mail_domain }}/cgi-bin/newemail.py">
<img width=300 style="float: none;" src="qr-chatmail-invite-{{config.mail_domain}}.png" /></a>
🐣 **Choose** your Avatar and Name
💬 **Start** chatting with any Delta Chat contacts using [QR invite codes](https://delta.chat/en/help#howtoe2ee)
## ⚡ Note: this is an experimental service ⚡

View File

@@ -1,39 +0,0 @@
<img width="800px" src="collage-info.png"/>
## More information
### Choosing a chatmail address instead of using a random one
In the Delta Chat account setup
you may tap `LOG INTO YOUR E-MAIL ACCOUNT`
and fill the two fields like this:
- `Address`: invent a word with *exactly* nine characters
and append `@{{config.mail_domain}}` to it.
- `Password`: invent at least 9 characters.
If the e-mail address is not yet taken, you'll get that account.
The first login sets your password.
### Rate and storage limits
- Un-encrypted messages are blocked to recipients outside
{{config.mail_domain}} but setting up contact via [QR invite codes](https://delta.chat/en/help#howtoe2ee)
allows your messages to pass freely to any outside recipients.
- You may send up to 60 messages per minute
- Messages are unconditionally removed 40 days after arriving on the server
- You can store up to [100MB messages on the server](https://delta.chat/en/help#what-happens-if-i-turn-on-delete-old-messages-from-server)
### Who are the operators? Which software is running?
This chatmail provider is run by a small voluntary group of devs and sysadmins,
who [publically develop chatmail provider setups](https://github.com/deltachat/chatmail).
Chatmail setups aim to be very low-maintenance, resource efficient and
interoperable with any other standards-compliant e-mail service.

View File

@@ -1,20 +0,0 @@
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
{% if config.webdev %}
<meta http-equiv="refresh" content="3">
{% endif %}
<title>{{ config.mail_domain }} {{ pagename }}</title>
<link rel="stylesheet" href="./water.css">
</head>
<body>
{{ markdown_html }}
<footer>
<a href="index.html">home</a> |
<a href="info.html">more info</a> |
<a href="privacy.html">privacy</a> |
<a href="https://github.com/deltachat/chatmail">-> public development </a>
</footer>
</body>
</html>

View File

@@ -1,321 +0,0 @@
<img width="800px" src="collage-privacy.png"/>
# Privacy Policy for {{ config.mail_domain }}
We want to show you in a fair and transparent way
what personal data is processed by us.
We follow a strict privacy-by-design approach
and try to avoid processing your data in the first place,
but as you may know,
the internet,
and in particular sending e-mail messages,
does not work without data.
Still,
it's only fair that you know at all times
what personal data is processed
when you use our service.
If you have any remaining questions about data protection, please contact us.
## 1. Name and contact information
Responsible for the processing of your personal data is:
```
{{ config.privacy_postal }}
```
E-mail: {{ config.privacy_mail }}
We have appointed a data protection officer:
```
{{ config.privacy_pdo }}
```
## 2. Processing when using chat e-mail services
We provide e-mail services optimized for the use from [Delta Chat](https://delta.chat) apps
and process only the data necessary
for the setup and technical execution of the e-mail dispatch.
The purpose of the processing is to
read, write, manage, delete, send, and receive emails.
For this purpose,
we operate server-side software
that enables us to send and receive e-mail messages.
Allowing the use of the e-mail service,
we process the following data and details:
- Outgoing and incoming messages (SMTP) are stored for transit
on behalf of their users until the message can be delivered.
- E-Mail-Messages are stored for the recipient and made accessible via IMAP protocols,
until explicitly deleted by the user or until a fixed time period is exceeded,
(*usually 4-8 weeks*).
- IMAP and SMTP protocols are password protected with unique credentials for each account.
- Users can retrieve or delete all stored messages
without intervention from the operators using standard IMAP client tools.
### 3.1 Account setup
Creating an account happens in one of two ways on our mail servers:
- with a QR invitation token
which is scanned using the DeltaChat app
and then the account is created.
- by letting Delta Chat otherwise create an account
and register it with a {{ config.mail_domain }} mail server.
In either case, we process the newly created email address.
No phone numbers,
other email addresses,
or other identifiable data
is currently required.
The legal basis for the processing is
Art. 6 (1) lit. b GDPR,
as you have a usage contract with us
by using our services.
## 3.2 Processing of E-Mail-Messages
In addition,
we will process data
to keep the server infrastructure operational
for purposes of e-mail dispatch
and abuse prevention.
- Therefore,
it is necessary to process the content and/or metadata
(e.g., headers of the email as well as smtp chatter)
of E-Mail-Messages in transit.
- We will keep logs of messages in transit for a limited time.
These logs are used to debug delivery problems and software bugs.
In addition,
we process data to protect the systems from excessive use.
Therefore, limits are enforced:
- rate limits
- storage limits
- message size limits
- any other limit neccessary for the whole server to function in a healthy way
and to prevent abuse.
The processing and use of the above permissions
are performed to provide the service.
The data processing is necessary for the use of our services,
therefore the legal basis of the processing is
Art. 6 (1) lit. b GDPR,
as you have a usage contract with us
by using our services.
The legal basis for the data processing
for the purposes of security and abuse prevention is
Art. 6 (1) lit. f GDPR.
Our legitimate interest results
from the aforementioned purposes.
We will not use the collected data
for the purpose of drawing conclusions
about your person.
## 3. Processing when using our Website
When you visit our website,
the browser used on your end device
automatically sends information to the server of our website.
This information is temporarily stored in a so-called log file.
The following information is collected and stored
until it is automatically deleted
(*usually 7 days*):
- used type of browser,
- used operating system,
- access date and time as well as
- country of origin and IP address,
- the requested file name or HTTP resource,
- the amount of data transferred,
- the access status (file transferred, file not found, etc.) and
- the page from which the file was requested.
This website is hosted by an external service provider (hoster).
The personal data collected on this website is stored
on the hoster's servers.
Our hoster will process your data
only to the extent necessary to fulfill its obligations
to perform under our instructions.
In order to ensure data protection-compliant processing,
we have concluded a data processing agreement with our hoster.
The aforementioned data is processed by us for the following purposes:
- Ensuring a reliable connection setup of the website,
- ensuring a convenient use of our website,
- checking and ensuring system security and stability, and
- for other administrative purposes.
The legal basis for the data processing is
Art. 6 (1) lit. f GDPR.
Our legitimate interest results
from the aforementioned purposes of data collection.
We will not use the collected data
for the purpose of drawing conclusions about your person.
## 4. Transfer of Data
Your personal data
will not be transferred to third parties
for purposes other than those listed below:
a) you have given your express consent
in accordance with Art. 6 para. 1 sentence 1 lit. a GDPR,
b) the disclosure is necessary for the assertion, exercise or defence of legal claims
pursuant to Art. 6 (1) sentence 1 lit. f GDPR
and there is no reason to assume that you have
an overriding interest worthy of protection
in the non-disclosure of your data,
c) in the event that there is a legal obligation to disclose your data
pursuant to Art. 6 para. 1 sentence 1 lit. c GDPR,
as well as
d) this is legally permissible and necessary
in accordance with Art. 6 Para. 1 S. 1 lit. b GDPR
for the processing of contractual relationships with you,
e) this is carried out by a service provider
acting on our behalf and on our exclusive instructions,
whom we have carefully selected (Art. 28 (1) GDPR)
and with whom we have concluded a corresponding contract on commissioned processing (Art. 28 (3) GDPR),
which obliges our contractor,
among other things,
to implement appropriate security measures
and grants us comprehensive control powers.
## 5. Rights of the data subject
The rights arise from Articles 12 to 23 GDPR.
Since no personal data is stored on our servers,
even in encrypted form,
there is no need to provide information
on these or possible objections.
A deletion can be made
directly in the Delta Chat email messenger.
a) request information about your personal data processed by us
in accordance with Art. 15 GDPR.
In particular,
you can request information about the processing purposes,
the category of personal data,
the categories of recipients to whom your data have been or will be disclosed,
the planned storage period,
the existence of a right to rectification, erasure, restriction of processing or objection,
the existence of a right of complaint,
the origin of your data if it has not been collected by us,
as well as the existence of automated decision-making including profiling
and, if applicable,
meaningful information about its details;
b) in accordance with Art. 16 of the GDPR,
immediately request the correction
of inaccurate or incomplete personal data stored by us;
c) pursuant to Article 17 of the GDPR,
to request the erasure of your personal data stored by us,
unless the processing is necessary
for the exercise of the right to freedom of expression and information,
for compliance with a legal obligation,
for reasons of public interest,
or for the establishment, exercise or defence of legal claims;
d) pursuant to Art. 18 GDPR,
to request the restriction of the processing of your personal data,
insofar as the accuracy of the data is disputed by you,
the processing is unlawful,
but you object to its erasure
and we no longer require the data,
but you need it for the assertion, exercise or defence of legal claims
or you have objected to the processing pursuant to Art. 21 GDPR;
e) pursuant to Art. 20 GDPR,
to receive your personal data that you have provided to us
in a structured, common and machine-readable format
or to request that it be transferred to another controller;
f) in accordance with Art. 7 (3) of the GDPR,
to revoke your consent given to us at any time.
This has the consequence that we may no longer continue the data processing
based on this consent in the future; and
g) complain to a supervisory authority
in accordance with Article 77 of the GDPR.
As a rule,
you can contact the supervisory authority of your usual place of residence
or workplace
or our registered office for this purpose.
The supervisory authority responsible for our place of business
is the `{{ config.privacy_supervisor }}`.
If you have any questions or complaints, please feel free to contact us by email:
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### 5.1 Right to object
If your personal data is processed on the basis of our legitimate interests
in accordance with Art. 6 (1) lit. f GDPR,
you have the right to object to the processing of your personal data
in accordance with Art. 21 GDPR,
provided that there are grounds for this based on your particular situation
or the objection is directed against direct advertising.
In the latter case,
you have a general right of objection,
which will be implemented by us
without specifying a particular situation.
If you wish to exercise your right of objection,
simply send an e-mail to: {{ config.privacy_mail }}
### 5.2 Right to withdraw
If your personal data is processed on the basis of your consent
in accordance with Art. 6 (1) lit. a GDPR
(e.g. via the mailing list),
you can withdraw your consent at any time
and without any disadvantages.
As a result,
we may no longer continue the data processing
that was based on this consent for the future.
However,
the withdrawal of your consent
does not affect the lawfulness of the processing
carried out on the basis of the consent until the withdrawal.
If you wish to make use of your right of withdrawal,
simply send an e-mail to: {{ config.privacy_mail }}
## 6. Validity of this privacy policy
This data protection declaration is valid
as of *December 2023*.
Due to the further development of our service and offers
or due to changed legal or official requirements,
it may become necessary to revise this data protection declaration from time to time.

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