fix: read account address from list_transports()

Delta Chat 2.63 stopped writing the legacy addr and mail_pw config keys.
Online tests that called get_config for those keys got None and crashed.

Read the address and password from list_transports() instead.

.github/workflows/ci.yaml

@@ -29,7 +29,7 @@ jobs:
           ref: ${{ github.event.pull_request.head.sha }}
           persist-credentials: false
       - name: download filtermail
-        run: curl -L https://github.com/chatmail/filtermail/releases/download/v0.7.4/filtermail-x86_64 -o /usr/local/bin/filtermail && chmod +x /usr/local/bin/filtermail
+        run: curl -L https://github.com/chatmail/filtermail/releases/download/v0.7.7/filtermail-x86_64 -o /usr/local/bin/filtermail && chmod +x /usr/local/bin/filtermail
       - name: run chatmaild tests 
         working-directory: chatmaild
         run: pipx run tox

CHANGELOG.md

@@ -1,5 +1,38 @@
 # Changelog for chatmail deployment
 
+## [1.13.0] - 2026-09-22
+
+### Bug Fixes
+
+- Actually use UTC time instead of just seemingly using it
+
+### Documentation
+
+- Describe Madmail v2 as a Rust chatmail relay
+
+### Features
+
+- Serve an APPVERSIONS.json index file to clients via IMAP metadata
+- *(mtail)* Deploy filtermail.mtail and gate mtail rule copy on mtail_address
+- *(mtail)* Validate programs during deploy
+- Move doveauth from dictproxy to lua/http
+- Distinguish AUTHENTICATION_FAILED/UNAVAILABLE login failures
+
+### Miscellaneous Tasks
+
+- Try to fix lack of RFC822 item support in madmail and make CI pass
+- Un-hardcode executable paths in some systemd service files
+- Follow the new mtail release source, upgrade 3.0.8 to 3.4.9
+- *(cmdeploy)* Refactor all pins into pins.py
+- *(doc)* Use sphinx roles for referencing repository files and dirs
+- update deltachat-android link to 2.59.1
+
+### Testing
+
+- Integrate lua testing into regular pytest run for push notifications
+- Cleanup and allow a repo-root level "pytest -n6" to succeed.
+- [**breaking**] Remove global registration of pytest plugins
+
 ## [1.12.0] - 2026-07-31
 
 ### Breaking Changes

RELEASE.md

@@ -1,12 +1,12 @@
 # Releasing a new version of chatmail relay
 
-For example, to release version 1.13.0 of chatmail relay, do the following steps.
+For example, to release version 1.14.0 of chatmail relay, do the following steps.
 
-1. Update the changelog: `git cliff --unreleased --tag 1.13.0 --prepend CHANGELOG.md` or `git cliff -u -t 1.13.0 -p CHANGELOG.md`.
+1. Update the changelog: `git cliff --unreleased --tag 1.14.0 --prepend CHANGELOG.md` or `git cliff -u -t 1.14.0 -p CHANGELOG.md`.
 
 2. Open the changelog in the editor, edit it if required.
 
-3. Commit the changes to the changelog with a commit message `chore(release): prepare for 1.9.0`.
+3. Commit the changes to the changelog with a commit message `chore(release): prepare for 1.14.0`.
 
 4. Open a PR with the new commit, merge it to main after review.
 

chatmaild/pyproject.toml

@@ -27,9 +27,6 @@ chatmail-quota-expire = "chatmaild.expire:quota_expire_main"
 chatmail-fsreport = "chatmaild.fsreport:main"
 lastlogin = "chatmaild.lastlogin:main"
 
-[project.entry-points.pytest11]
-"chatmaild.testplugin" = "chatmaild.tests.plugin"
-
 [tool.pytest.ini_options]
 addopts = "-v -ra --strict-markers"
 log_format = "%(asctime)s %(levelname)s %(message)s"

chatmaild/src/chatmaild/config.py

@@ -55,6 +55,7 @@ class Config:
         self.postfix_reinject_port_incoming = int(
             params.pop("postfix_reinject_port_incoming", "10026")
         )
+        self.doveauth_http_port = int(params.pop("doveauth_http_port", "10084"))
         self.mtail_address = params.pop("mtail_address", None)
         self.disable_ipv6 = params.pop("disable_ipv6", "false").lower() == "true"
         self.acme_email = params.pop("acme_email", "")

chatmaild/src/chatmaild/defaults/appversions.json

@@ -5,9 +5,9 @@
       "sources": [
         {
           "sourceId": "gplay",
-          "versionInteger": 757,
-          "versionString": "2.59.1",
-          "downloadUrl": "https://github.com/deltachat/deltachat-android/releases/download/v2.59.1/deltachat-gplay-release-2.59.1.apk"
+          "versionInteger": 758,
+          "versionString": "2.62.0",
+          "downloadUrl": "https://github.com/deltachat/deltachat-android/releases/download/v2.62.0/deltachat-gplay-release-2.62.0.apk"
         }
       ]
     }

chatmaild/src/chatmaild/doveauth.py

@@ -1,10 +1,17 @@
-import json
+"""Create chatmail addresses on first login.
+
+Dovecot only asks us about addresses it does not already find in the mailbox:
+the auth.lua we deploy with dovecot (cmdeploy/src/cmdeploy/dovecot/auth.lua.j2)
+verifies existing users itself against a mailbox password file,
+and HTTP-POSTs everything else to the /create endpoint implemented in this module.
+"""
+
 import logging
 import os
 import re
 import sys
-
-import filelock
+import threading
+from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
 
 try:
     import crypt_r
@@ -12,7 +19,6 @@ except ImportError:
     import crypt as crypt_r
 
 from .config import Config, read_config
-from .dictproxy import DictProxy
 from .migrate_db import migrate_from_db_to_maildir
 from .syslimits import has_sufficient_resources
 
@@ -64,109 +70,117 @@ def is_allowed_to_create(config: Config, user, cleartext_password) -> bool:
     return True
 
 
-def split_and_unescape(s):
-    """Split strings using double quote as a separator and backslash as escape character
-    into parts."""
-
-    out = ""
-    i = 0
-    while i < len(s):
-        c = s[i]
-        if c == "\\":
-            # Skip escape character.
-            i += 1
-
-            # This will raise IndexError if there is no character
-            # after escape character. This is expected
-            # as this is an invalid input.
-            out += s[i]
-        elif c == '"':
-            # Separator
-            yield out
-            out = ""
-        else:
-            out += c
-        i += 1
-    yield out
+def verify_password(stored, cleartext_password) -> bool:
+    if stored.startswith("{"):
+        stored = stored.split("}", 1)[1]
+    return crypt_r.crypt(cleartext_password, stored) == stored
 
 
-class AuthDictProxy(DictProxy):
+class DoveAuth:
     def __init__(self, config):
-        super().__init__()
         self.config = config
+        self.creation_lock = threading.Lock()
 
-    def handle_lookup(self, parts):
-        # Dovecot <2.3.17 has only one part,
-        # do not attempt to read any other parts for compatibility.
-        keyname = parts[0]
-
-        namespace, type, args = keyname.split("/", 2)
-        args = list(split_and_unescape(args))
-
+    def create_user(self, addr, cleartext_password) -> bool:
+        """Create the address, or verify the password if it exists already."""
         config = self.config
-        reply_command = "F"
-        res = ""
-        if namespace == "shared":
-            if type == "userdb":
-                user = args[0]
-                if user.endswith(f"@{config.mail_domain}"):
-                    res = self.lookup_userdb(user)
-                if res:
-                    reply_command = "O"
-                else:
-                    reply_command = "N"
-            elif type == "passdb":
-                user = args[1]
-                if user.endswith(f"@{config.mail_domain}"):
-                    res = self.lookup_passdb(user, cleartext_password=args[0])
-                if res:
-                    reply_command = "O"
-                else:
-                    reply_command = "N"
-        json_res = json.dumps(res) if res else ""
-        return f"{reply_command}{json_res}\n"
-
-    def handle_iterate(self, parts):
-        # example: I0\t0\tshared/userdb/
-        if parts[2] == "shared/userdb/":
-            result = "".join(
-                f"Oshared/userdb/{user}\t\n" for user in self.iter_userdb()
-            )
-            return f"{result}\n"
-
-    def iter_userdb(self) -> list:
-        """Get a list of all user addresses."""
-        return [x for x in os.listdir(self.config.mailboxes_dir) if "@" in x]
-
-    def lookup_userdb(self, addr):
-        return self.config.get_user(addr).get_userdb_dict()
-
-    def lookup_passdb(self, addr, cleartext_password):
-        user = self.config.get_user(addr)
-        userdata = user.get_userdb_dict()
-        if userdata:
-            return userdata
-        if not is_allowed_to_create(self.config, addr, cleartext_password):
-            return
-        if not has_sufficient_resources(self.config):
-            return
-
-        lock = filelock.FileLock(str(user.password_path) + ".lock", timeout=5)
-        with lock:
-            userdata = user.get_userdb_dict()
-            if userdata:
-                return userdata
+        if not addr.endswith(f"@{config.mail_domain}"):
+            logging.warning("address not in mail domain: %r", addr)
+            return False
+        try:
+            user = config.get_user(addr)
+        except ValueError:
+            logging.warning("invalid address: %r", addr)
+            return False
+        with self.creation_lock:
+            passhash = user.get_password_hash()
+            if passhash is not None:
+                # a concurrent first login may have just created the address
+                return verify_password(passhash, cleartext_password)
+            if not is_allowed_to_create(config, addr, cleartext_password):
+                return False
+            if not has_sufficient_resources(config):
+                return False
             user.set_password(encrypt_password(cleartext_password))
-            print(f"Created address: {addr}", file=sys.stderr)
-        return user.get_userdb_dict()
+        # mtail counts created_accounts off this exact line
+        print(f"Created address: {addr}", file=sys.stderr)
+        return True
+
+
+class CreateHandler(BaseHTTPRequestHandler):
+    """Answer POST /create requests from dovecot's auth.lua, body `addr\\tpassword`.
+
+    The body must be UTF-8 and only the first tab separates the fields,
+    so a password may itself contain tabs.
+    Any non-UTF8 or \\0 bytes in the body fail the request.
+
+    Addresses are ASCII: dovecot refuses any login name outside its
+    auth_username_chars before auth.lua ever sees it.
+
+    Dovecot hands auth.lua the exact password bytes the client sent;
+    decoding and re-encoding UTF-8 is byte-identical,
+    so dovecot's password_verify later recomputes the same hash crypt() stores here.
+    """
+
+    protocol_version = "HTTP/1.1"  # dovecot's HTTP client reuses connections
+
+    max_body_len = 512  # an address and a password
+
+    def do_POST(self):
+        if self.path != "/create":
+            self.reply(404)
+            return
+        length = self.body_length()
+        if length is None:
+            self.reply(400)
+            return
+        body = self.rfile.read(length)
+        try:
+            addr, _, password = body.decode("utf-8").partition("\t")
+        except UnicodeDecodeError:
+            self.reply(400)
+            return
+        if "\0" in addr or "\0" in password:
+            self.reply(400)
+            return
+        self.reply(200 if self.server.doveauth.create_user(addr, password) else 403)
+
+    def body_length(self):
+        try:
+            length = int(self.headers["Content-Length"])
+        except (TypeError, ValueError):
+            return None
+        return length if 0 <= length <= self.max_body_len else None
+
+    def reply(self, status):
+        self.send_response(status)
+        self.send_header("Content-Length", "0")
+        if status != 200:
+            # Just close on any failure, as body might not be fully read.
+            # It's anyway cheap to re-establish http localhost without TLS.
+            self.send_header("Connection", "close")
+        self.end_headers()
+
+    def log_message(self, format, *args):
+        # the per-request access log would only duplicate our own stderr lines
+        pass
+
+
+class DoveAuthServer(ThreadingHTTPServer):
+    # a burst of first-time logins (e.g. from CI) must not overflow
+    # the accept queue, see https://github.com/chatmail/relay/issues/436
+    request_queue_size = 1000
+
+    def __init__(self, config, port):
+        super().__init__(("127.0.0.1", port), CreateHandler)
+        self.doveauth = DoveAuth(config)
 
 
 def main():
-    socket, cfgpath = sys.argv[1:]
+    (cfgpath,) = sys.argv[1:]
     config = read_config(cfgpath)
 
     migrate_from_db_to_maildir(config)
 
-    dictproxy = AuthDictProxy(config=config)
-
-    dictproxy.serve_forever_from_socket(socket)
+    server = DoveAuthServer(config, config.doveauth_http_port)
+    server.serve_forever()

chatmaild/src/chatmaild/expire.py

@@ -259,7 +259,7 @@ def daily_expire_main(args=None):
     args = parser.parse_args(args)
 
     config = read_config(args.chatmail_ini)
-    now = datetime.utcnow().timestamp()
+    now = time.time()
     if args.days:
         now = now - 86400 * int(args.days)
 

chatmaild/src/chatmaild/fsreport.py

@@ -27,6 +27,7 @@ to also write legacy metrics.py style output (default: /var/www/html/metrics):
 
 import os
 import tempfile
+import time
 from argparse import ArgumentParser
 from datetime import datetime
 
@@ -264,7 +265,7 @@ def main(args=None):
 
     config = read_config(args.chatmail_ini)
 
-    now = datetime.utcnow().timestamp()
+    now = time.time()
     if args.days:
         now = now - 86400 * int(args.days)
 

chatmaild/src/chatmaild/tests/conftest.py

@@ -0,0 +1,3 @@
+"""Opt in to the chatmaild fixtures, which are not registered globally."""
+
+from chatmaild.tests.plugin import *  # noqa: F403

chatmaild/src/chatmaild/tests/test_delete_inactive_users.py

@@ -1,6 +1,6 @@
 import time
 
-from chatmaild.doveauth import AuthDictProxy
+from chatmaild.doveauth import DoveAuth
 from chatmaild.expire import daily_expire_main as main_expire
 
 
@@ -18,10 +18,10 @@ def test_login_timestamps(example_config):
 def test_delete_inactive_users(example_config):
     new = time.time()
     old = new - (example_config.delete_inactive_users_after * 86400) - 1
-    dictproxy = AuthDictProxy(example_config)
+    doveauth = DoveAuth(example_config)
 
     def create_user(addr, last_login):
-        dictproxy.lookup_passdb(addr, "q9mr3faue")
+        doveauth.create_user(addr, "q9mr3faue")
         user = example_config.get_user(addr)
         user.maildir.joinpath("cur").mkdir()
         user.maildir.joinpath("cur", "something").mkdir()

chatmaild/src/chatmaild/tests/test_doveauth.py

@@ -1,42 +1,37 @@
-import io
-import json
-import queue
+import http.client
 import threading
-import traceback
+from concurrent.futures import ThreadPoolExecutor
 
 import pytest
 
 import chatmaild.doveauth
 from chatmaild.doveauth import (
-    AuthDictProxy,
+    CreateHandler,
+    DoveAuth,
+    DoveAuthServer,
     is_allowed_to_create,
 )
 from chatmaild.newemail import create_newemail_dict
 
 
 @pytest.fixture
-def dictproxy(example_config):
-    return AuthDictProxy(config=example_config)
+def doveauth(example_config):
+    return DoveAuth(example_config)
 
 
-def test_basic(dictproxy, example_gencreds):
+def stored_hash(config, addr):
+    return config.get_user(addr).get_password_hash()
+
+
+def test_basic(doveauth, example_config, example_gencreds):
     addr, password = example_gencreds()
-    dictproxy.lookup_passdb(addr, password)
-    data = dictproxy.lookup_userdb(addr)
-    assert data
-    data2 = dictproxy.lookup_passdb(addr, password)
-    assert data == data2
+    assert doveauth.create_user(addr, password)
+    passhash = stored_hash(example_config, addr)
+    assert passhash.startswith("{SHA512-CRYPT}")
 
-
-def test_iterate_addresses(dictproxy):
-    addresses = []
-
-    for i in range(10):
-        addresses.append(f"asdf1234{i}@chat.example.org")
-        dictproxy.lookup_passdb(addresses[-1], "q9mr3faue")
-
-    res = dictproxy.iter_userdb()
-    assert set(res) == set(addresses)
+    # a second login verifies against the stored hash and rewrites nothing
+    assert doveauth.create_user(addr, password)
+    assert stored_hash(example_config, addr) == passhash
 
 
 def test_invalid_username_length(example_config):
@@ -53,75 +48,32 @@ def test_invalid_username_length(example_config):
     )
 
 
-def test_dont_overwrite_password_on_wrong_login(dictproxy):
-    """Test that logging in with a different password doesn't create a new user"""
-    res = dictproxy.lookup_passdb(
-        "newuser12@chat.example.org", "kajdlkajsldk12l3kj1983"
-    )
-    assert res["password"]
-    res2 = dictproxy.lookup_passdb("newuser12@chat.example.org", "kajdslqwe")
-    # this function always returns a password hash, which is actually compared by dovecot.
-    assert res["password"] == res2["password"]
+def test_dont_overwrite_password_on_wrong_login(doveauth, example_config):
+    addr = "newuser12@chat.example.org"
+    assert doveauth.create_user(addr, "kajdlkajsldk12l3kj1983")
+    passhash = stored_hash(example_config, addr)
+
+    assert not doveauth.create_user(addr, "kajdslqwe")
+    assert stored_hash(example_config, addr) == passhash
+
+    assert doveauth.create_user(addr, "kajdlkajsldk12l3kj1983")
+    assert stored_hash(example_config, addr) == passhash
 
 
-def test_nocreate_file(monkeypatch, tmpdir, dictproxy):
+def test_foreign_domain_is_refused(doveauth):
+    assert not doveauth.create_user("newuser12@evil.example.org", "qlwkejqlwe12")
+
+
+def test_nocreate_file(monkeypatch, tmpdir, doveauth, example_config):
     p = tmpdir.join("nocreate")
     p.write("")
     monkeypatch.setattr(chatmaild.doveauth, "NOCREATE_FILE", str(p))
-    dictproxy.lookup_passdb("newuser12@chat.example.org", "zequ0Aimuchoodaechik")
-    assert not dictproxy.lookup_userdb("newuser12@chat.example.org")
-
-
-def test_handle_dovecot_request(dictproxy):
-    transactions = {}
-    # Test that password can contain ", ', \ and /
-    msg = (
-        'Lshared/passdb/laksjdlaksjdlak\\\\sjdlk\\"12j\\\'3l1/k2j3123"'
-        "some42123@chat.example.org\tsome42123@chat.example.org"
-    )
-    res = dictproxy.handle_dovecot_request(msg, transactions)
-    assert res
-    assert res[0] == "O" and res.endswith("\n")
-    userdata = json.loads(res[1:].strip())
-    assert userdata["home"].endswith("chat.example.org/some42123@chat.example.org")
-    assert userdata["uid"] == userdata["gid"] == "vmail"
-    assert userdata["password"].startswith("{SHA512-CRYPT}")
-
-
-def test_handle_dovecot_protocol_hello_is_skipped(example_config, caplog):
-    dictproxy = AuthDictProxy(config=example_config)
-    rfile = io.BytesIO(b"H3\t2\t0\t\tauth\n")
-    wfile = io.BytesIO()
-    dictproxy.loop_forever(rfile, wfile)
-    assert wfile.getvalue() == b""
-    assert not caplog.messages
-
-
-def test_handle_dovecot_protocol_user_not_exists(example_config):
-    dictproxy = AuthDictProxy(config=example_config)
-    rfile = io.BytesIO(
-        b"H3\t2\t0\t\tauth\nLshared/userdb/foobar@chat.example.org\tfoobar@chat.example.org\n"
-    )
-    wfile = io.BytesIO()
-    dictproxy.loop_forever(rfile, wfile)
-    assert wfile.getvalue() == b"N\n"
-
-
-def test_handle_dovecot_protocol_iterate(example_config):
-    dictproxy = AuthDictProxy(config=example_config)
-    dictproxy.lookup_passdb("asdf00000@chat.example.org", "q9mr3faue")
-    dictproxy.lookup_passdb("asdf11111@chat.example.org", "q9mr3faue")
-    rfile = io.BytesIO(b"H3\t2\t0\t\tauth\nI0\t0\tshared/userdb/")
-    wfile = io.BytesIO()
-    dictproxy.loop_forever(rfile, wfile)
-    lines = wfile.getvalue().decode("ascii").split("\n")
-    assert "Oshared/userdb/asdf00000@chat.example.org\t" in lines
-    assert "Oshared/userdb/asdf11111@chat.example.org\t" in lines
-    assert not lines[2]
+    addr = "newuser12@chat.example.org"
+    assert not doveauth.create_user(addr, "zequ0Aimuchoodaechik")
+    assert stored_hash(example_config, addr) is None
 
 
 def test_invalid_localpart_characters(make_config):
-    """Test that is_allowed_to_create rejects localparts with invalid characters."""
     config = make_config("chat.example.org", {"username_min_length": "3"})
     password = "zequ0Aimuchoodaechik"
     domain = config.mail_domain
@@ -141,78 +93,150 @@ def test_invalid_localpart_characters(make_config):
     assert not is_allowed_to_create(config, f"ab@cdef@{domain}", password)
     assert not is_allowed_to_create(config, f"abc/def@{domain}", password)
     assert not is_allowed_to_create(config, f"abc\\def@{domain}", password)
+    assert not is_allowed_to_create(config, f"üser123@{domain}", password)
 
 
-def test_concurrent_creation_same_account(dictproxy):
-    """Test that concurrent creation of the same account doesn't corrupt password."""
+def test_concurrent_creation_same_account(doveauth, example_config, capsys):
     addr = "racetest1@chat.example.org"
     password = "zequ0Aimuchoodaechik"
-    num_threads = 10
-    results = queue.Queue()
 
-    def create():
-        try:
-            res = dictproxy.lookup_passdb(addr, password)
-            results.put(("ok", res))
-        except Exception:
-            results.put(("err", traceback.format_exc()))
-
-    threads = [threading.Thread(target=create, daemon=True) for _ in range(num_threads)]
-    for t in threads:
-        t.start()
-    for t in threads:
-        t.join(timeout=10)
-
-    passwords_seen = set()
-    for _ in range(num_threads):
-        status, res = results.get()
-        if status == "err":
-            pytest.fail(f"concurrent creation failed\n{res}")
-        passwords_seen.add(res["password"])
+    def create(_):
+        ok = doveauth.create_user(addr, password)
+        return ok, stored_hash(example_config, addr)
 
+    with ThreadPoolExecutor(10) as pool:
+        results = list(pool.map(create, range(10)))
+    assert all(ok for ok, _ in results)
     # all threads must see the same password hash
-    assert len(passwords_seen) == 1
-
-
-def test_50_concurrent_lookups_different_accounts(example_gencreds, dictproxy):
-    num_threads = 50
-    req_per_thread = 5
-    results = queue.Queue()
-
-    def lookup():
-        for i in range(req_per_thread):
-            addr, password = example_gencreds()
-            try:
-                dictproxy.lookup_passdb(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, 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}")
+    assert len({passhash for _, passhash in results}) == 1
+    assert capsys.readouterr().err.count("Created address:") == 1
 
 
 def test_insufficient_resources_block_creation_not_existing_logins(
-    dictproxy, example_gencreds, monkeypatch
+    doveauth, example_gencreds, monkeypatch
 ):
     addr, password = example_gencreds()
-    assert dictproxy.lookup_passdb(addr, password)
+    assert doveauth.create_user(addr, password)
 
     monkeypatch.setattr(
         chatmaild.doveauth, "has_sufficient_resources", lambda config: False
     )
     newaddr, newpassword = example_gencreds()
-    assert not dictproxy.lookup_passdb(newaddr, newpassword)
-    assert dictproxy.lookup_passdb(addr, password)
+    assert not doveauth.create_user(newaddr, newpassword)
+    assert doveauth.create_user(addr, password)
+
+
+class TestHttpPost:
+    @pytest.fixture
+    def doveauth_server(self, example_config):
+        server = DoveAuthServer(example_config, port=0)
+        threading.Thread(target=server.serve_forever, daemon=True).start()
+        yield f"127.0.0.1:{server.server_address[1]}"
+        server.shutdown()
+        server.server_close()
+
+    @pytest.fixture
+    def post(self, doveauth_server):
+        def post(path, data):
+            conn = http.client.HTTPConnection(doveauth_server, timeout=10)
+            try:
+                return self.post_on(conn, path, data).status
+            finally:
+                conn.close()
+
+        return post
+
+    @pytest.fixture
+    def connection(self, doveauth_server):
+        """One kept-alive connection, which is all dovecot's HTTP client opens."""
+        conn = http.client.HTTPConnection(doveauth_server, timeout=10)
+        yield conn
+        conn.close()
+
+    @staticmethod
+    def post_on(conn, path, data):
+        conn.request("POST", path, body=data)
+        resp = conn.getresponse()
+        resp.read()
+        return resp
+
+    def test_create_and_verify(self, post, example_config, example_gencreds):
+        addr, password = example_gencreds()
+        assert post("/create", f"{addr}\t{password}".encode()) == 200
+        assert stored_hash(example_config, addr).startswith("{SHA512-CRYPT}")
+
+        # second login with the same password verifies, a wrong one is refused
+        assert post("/create", f"{addr}\t{password}".encode()) == 200
+        assert post("/create", f"{addr}\twrong{password}".encode()) == 403
+
+    def test_password_special_chars_survive_transport(self, post, example_gencreds):
+        addr, _ = example_gencreds()
+        password = "laksjdlaksjdlak\\sjdlk\"12j'3l1/k2\tj3123"
+        body = f"{addr}\t{password}".encode()
+        assert post("/create", body) == 200
+        assert post("/create", body) == 200
+        assert post("/create", f"{addr}\totherpassword1".encode()) == 403
+
+    def test_password_must_be_utf8(self, post, example_gencreds):
+        addr, _ = example_gencreds()
+        assert post("/create", f"{addr}\tpässwort12".encode()) == 200
+        assert post("/create", addr.encode() + b"\tp\xe4sswort12") == 400
+
+    def test_nul_is_refused_before_crypt_sees_it(self, post, example_gencreds):
+        addr, _ = example_gencreds()
+        assert post("/create", f"{addr}\tpass\0word12".encode()) == 400
+        assert (
+            post("/create", "us\0er12345@chat.example.org\tlongenough1".encode()) == 400
+        )
+
+    def test_refused_creation(self, post, example_gencreds):
+        addr, _ = example_gencreds()
+        assert post("/create", f"{addr}\tshort".encode()) == 403
+        assert post("/create", b"not-an-address\tlongenoughpassword") == 403
+        body = "bürger123@chat.example.org\tlongenoughpw".encode()
+        assert post("/create", body) == 403
+        assert post("/create", b"") == 403
+
+    def test_body_length_limit(self, post, example_gencreds):
+        addr, _ = example_gencreds()
+        fill = CreateHandler.max_body_len - len(addr) - len("\t")
+        body = f"{addr}\t{'x' * fill}".encode()
+        assert len(body) == CreateHandler.max_body_len
+        assert post("/create", body) == 200
+
+        body = f"{addr}\t{'x' * (fill + 1)}".encode()
+        assert len(body) == CreateHandler.max_body_len + 1
+        assert post("/create", body) == 400
+
+    def test_connection_is_reused_across_200_replies(
+        self, connection, example_gencreds
+    ):
+        addr, password = example_gencreds()
+        body = f"{addr}\t{password}".encode()
+        # create, then verify the same password, on one connection
+        for _ in range(2):
+            resp = self.post_on(connection, "/create", body)
+            assert (resp.status, resp.will_close) == (200, False)
+
+    @pytest.mark.parametrize(
+        "path,data,status",
+        [
+            ("/other", b"not read", 404),
+            ("/create", b"x" * (CreateHandler.max_body_len + 1), 400),
+            ("/create", b"not-an-address\tlongenoughpassword", 403),
+        ],
+    )
+    def test_error_replies_close_the_connection(self, connection, path, data, status):
+        resp = self.post_on(connection, path, data)
+        assert (resp.status, resp.will_close) == (status, True)
+
+    @pytest.mark.parametrize("content_length", [None, "-1", "notanumber", "999999"])
+    def test_bad_content_length(self, connection, content_length):
+        # the fixture timeout turns a server that waits for the body into a failure
+        connection.putrequest("POST", "/create", skip_accept_encoding=True)
+        if content_length is not None:
+            connection.putheader("Content-Length", content_length)
+        connection.endheaders()
+        resp = connection.getresponse()
+        assert resp.status == 400
+        assert resp.will_close

chatmaild/src/chatmaild/tests/test_expire.py

@@ -3,7 +3,6 @@ import os
 import random
 import shutil
 import time
-from datetime import datetime
 from fnmatch import fnmatch
 from pathlib import Path
 
@@ -41,7 +40,7 @@ def fill_mbox(folderdir):
 
 
 def create_new_messages(basedir, relpaths, size=1000, days=0):
-    now = datetime.utcnow().timestamp()
+    now = time.time()
 
     for relpath in relpaths:
         msg_path = Path(basedir).joinpath(relpath)
@@ -112,9 +111,7 @@ def test_mbox_without_password(mbox1, example_config, capsys):
     mbox_rescan = MailboxStat(mbox1.basedir)
     assert mbox_rescan.last_login is None
 
-    exp = Expiry(
-        example_config, dry=False, now=datetime.now().timestamp(), verbose=False
-    )
+    exp = Expiry(example_config, dry=False, now=time.time(), verbose=False)
     exp.process_mailbox_stat(mbox_rescan)
     out, err = capsys.readouterr()
     assert "doesn't have last_login but isn't empty" in err
@@ -152,7 +149,7 @@ def test_report_mdir_filters_by_path(mbox1, example_config):
     """Test that Report with mdir='cur' only counts messages in cur/ subdirectory."""
     from chatmaild.fsreport import Report
 
-    now = datetime.utcnow().timestamp()
+    now = time.time()
 
     # Set password mtime to old enough so min_login_age check passes
     password = Path(mbox1.basedir).joinpath("password")

chatmaild/src/chatmaild/tests/test_lastlogin.py

@@ -1,6 +1,6 @@
 import time
 
-from chatmaild.doveauth import AuthDictProxy
+from chatmaild.doveauth import DoveAuth
 from chatmaild.lastlogin import (
     LastLoginDictProxy,
 )
@@ -9,8 +9,8 @@ from chatmaild.lastlogin import (
 def test_handle_dovecot_request_last_login(testaddr, example_config):
     dictproxy = LastLoginDictProxy(config=example_config)
 
-    authproxy = AuthDictProxy(config=example_config)
-    authproxy.lookup_passdb(testaddr, "1l2k3j1l2k3jl123")
+    doveauth = DoveAuth(example_config)
+    doveauth.create_user(testaddr, "1l2k3j1l2k3jl123")
 
     dictproxy_transactions = {}
 

chatmaild/src/chatmaild/tests/test_migrate_db.py

@@ -63,7 +63,7 @@ def test_migration(tmp_path, example_config, caplog):
         user = example_config.get_user(path.name)
         if last_login:
             assert user.get_last_login_timestamp() == last_login
-        assert password == user.get_userdb_dict()["password"]
+        assert password == user.get_password_hash()
 
     assert not all
     assert not example_config.passdb_path.exists()

chatmaild/src/chatmaild/tests/test_user.py

@@ -8,28 +8,23 @@ def test_login_timestamp(testaddr, example_config):
     assert user.get_last_login_timestamp() == 86400 * 2
 
 
-def test_get_user_dict_not_set(testaddr, example_config, caplog):
+def test_get_password_hash_not_set(testaddr, example_config, caplog):
     user = example_config.get_user(testaddr)
     assert not caplog.records
-    assert user.get_userdb_dict() == {}
+    assert user.get_password_hash() is None
     assert len(caplog.records) == 0
 
     user.set_password("")
-    assert user.get_userdb_dict() == {}
+    assert user.get_password_hash() is None
     assert len(caplog.records) == 1
 
 
-def test_get_user_dict(make_config, tmp_path):
+def test_get_password_hash(make_config, tmp_path):
     config = make_config("something.testrun.org")
-    addr = "user1@something.org"
-    user = config.get_user(addr)
+    user = config.get_user("user1@something.org")
     enc_password = "l1k2j31lk2j3l1k23j123"
     user.set_password(enc_password)
-    data = user.get_userdb_dict()
-    assert addr in str(data["home"])
-    assert data["uid"] == "vmail"
-    assert data["gid"] == "vmail"
-    assert data["password"] == enc_password
+    assert user.get_password_hash() == enc_password
 
 
 def test_no_mailboxes_dir(testaddr, example_config, tmp_path):

chatmaild/src/chatmaild/user.py

@@ -21,20 +21,17 @@ class User:
     def can_track(self):
         return "@" in self.addr
 
-    def get_userdb_dict(self):
-        """Return a non-empty dovecot 'userdb' style dict
-        if the user has an existing non-empty password"""
+    def get_password_hash(self):
         try:
-            pw = self.password_path.read_text()
+            passhash = self.password_path.read_text()
         except FileNotFoundError:
-            return {}
+            return None
 
-        if not pw:
+        if not passhash:
             logging.error(f"password is empty for: {self.addr}")
-            return {}
+            return None
 
-        home = str(self.maildir)
-        return dict(addr=self.addr, home=home, uid=self.uid, gid=self.gid, password=pw)
+        return passhash
 
     def is_incoming_cleartext_ok(self):
         return not self.enforce_E2EE_path.exists()

cmdeploy/pyproject.toml

@@ -19,6 +19,7 @@ dependencies = [
   "pytest-xdist", 
   "execnet",
   "imap_tools",
+  "jinja2",
   "lupa",
   "deltachat-rpc-client",
   "deltachat-rpc-server",
@@ -27,10 +28,6 @@ dependencies = [
 [project.scripts]
 cmdeploy = "cmdeploy.cmdeploy:main"
 
-[project.entry-points.pytest11]
-"chatmaild.testplugin" = "chatmaild.tests.plugin"
-"cmdeploy.testplugin" = "cmdeploy.tests.plugin"
-
 [tool.pytest.ini_options]
 addopts = "-v -ra --strict-markers"
 

cmdeploy/src/cmdeploy/__init__.py

@@ -0,0 +1 @@
+

cmdeploy/src/cmdeploy/dovecot/auth.conf

@@ -1,12 +0,0 @@
-uri = proxy:/run/doveauth/doveauth.socket:auth
-iterate_disable = no
-iterate_prefix = userdb/
-
-default_pass_scheme = plain
-# %E escapes characters " (double quote), ' (single quote) and \ (backslash) with \ (backslash).
-# See <https://doc.dovecot.org/2.3/configuration_manual/config_file/config_variables/#modifiers>
-# for documentation.
-#
-# We escape user-provided input and use double quote as a separator.
-password_key = passdb/%Ew"%Eu
-user_key = userdb/%Eu

cmdeploy/src/cmdeploy/dovecot/auth.lua.j2

@@ -0,0 +1,68 @@
+-- Existing addresses are served from the maildir directly.
+-- Unknown ones are offered to doveauth, which owns the creation policy.
+local mailboxes_dir = "{{ config.mailboxes_dir }}"
+local domain_suffix = "@{{ config.mail_domain }}"
+local create_url = "http://127.0.0.1:{{ config.doveauth_http_port }}/create"
+
+local http_client
+
+local function is_ours(user)
+  return user:sub(-#domain_suffix) == domain_suffix
+     and not user:find("/", 1, true)
+end
+
+local function password_hash(user)
+  local fh = io.open(mailboxes_dir .. "/" .. user .. "/password", "r")
+  if not fh then
+    return nil
+  end
+  local hash, rest = fh:read("l", "a")
+  fh:close()
+  if hash == nil or hash == "" or rest ~= "" then
+    return nil
+  end
+  return hash
+end
+
+local function userdb_fields(user)
+  return {home = mailboxes_dir .. "/" .. user, uid = "vmail", gid = "vmail"}
+end
+
+local function create(user, password)
+  local request = http_client:request({url = create_url, method = "POST"})
+  request:set_payload(user .. "\t" .. password)
+  return request:submit():status()
+end
+
+-- Entry points called by dovecot
+
+function script_init()
+  http_client = dovecot.http.client({request_timeout_msecs = 5000, max_attempts = 1})
+  return 0
+end
+
+function auth_userdb_lookup(req)
+  if not is_ours(req.user) or password_hash(req.user) == nil then
+    return dovecot.auth.USERDB_RESULT_USER_UNKNOWN, {}
+  end
+  return dovecot.auth.USERDB_RESULT_OK, userdb_fields(req.user)
+end
+
+function auth_password_verify(req, password)
+  if not is_ours(req.user) then
+    return dovecot.auth.PASSDB_RESULT_USER_UNKNOWN, {}
+  end
+  local hash = password_hash(req.user)
+  if hash == nil then
+    -- doveauth refuses with 4xx; dovecot reports its own failures as 9000 and up
+    local status = create(req.user, password)
+    if status >= 500 then
+      return dovecot.auth.PASSDB_RESULT_INTERNAL_FAILURE, {}
+    elseif status ~= 200 then
+      return dovecot.auth.PASSDB_RESULT_USER_UNKNOWN, {}
+    end
+  elseif req:password_verify(hash, password) ~= 1 then
+    return dovecot.auth.PASSDB_RESULT_PASSWORD_MISMATCH, {}
+  end
+  return dovecot.auth.PASSDB_RESULT_OK, userdb_fields(req.user)
+end

cmdeploy/src/cmdeploy/dovecot/deployer.py

@@ -31,7 +31,7 @@ class DovecotDeployer(Deployer):
         arch = host.get_fact(Arch)
         with blocked_service_startup():
             debs = []
-            for pkg in ("core", "imapd", "lmtpd"):
+            for pkg in ("core", "imapd", "lmtpd", "auth-lua"):
                 deb, changed = _download_dovecot_package(pkg, arch)
                 self.need_restart |= changed
                 if deb:
@@ -133,8 +133,12 @@ def _configure_dovecot(deployer, config: Config, debug: bool = False):
         config=config,
         debug=debug,
         disable_ipv6=config.disable_ipv6,
+        config_dir="/etc/dovecot",
+        dh_path="/usr/share/dovecot/dh.pem",
+        quota_expire_bin="/usr/local/lib/chatmaild/venv/bin/chatmail-quota-expire",
     )
-    deployer.put_file("dovecot/auth.conf", "/etc/dovecot/auth.conf")
+    deployer.put_template("dovecot/auth.lua.j2", "/etc/dovecot/auth.lua", config=config)
+    deployer.remove_file("/etc/dovecot/auth.conf")
     deployer.put_file(
         "dovecot/push_notification.lua", "/etc/dovecot/push_notification.lua"
     )

cmdeploy/src/cmdeploy/dovecot/dovecot.conf.j2

@@ -61,12 +61,12 @@ imap_capability = +XDELTAPUSH XCHATMAIL
 
 # Authentication for system users.
 passdb {
-  driver = dict
-  args = /etc/dovecot/auth.conf
+  driver = lua
+  args = file={{ config_dir }}/auth.lua blocking=yes
 }
 userdb {
-  driver = dict
-  args = /etc/dovecot/auth.conf
+  driver = lua
+  args = file={{ config_dir }}/auth.lua blocking=yes
 }
 ##
 ## Mailbox locations and namespaces
@@ -168,7 +168,7 @@ plugin {
 }
 
 service quota-warning {
-  executable = script /usr/local/lib/chatmaild/venv/bin/chatmail-quota-expire
+  executable = script {{ quota_expire_bin }}
   user = vmail
   unix_listener quota-warning {
      user = vmail
@@ -179,7 +179,7 @@ service quota-warning {
 # push_notification configuration
 plugin {
   # <https://doc.dovecot.org/2.3/configuration_manual/push_notification/#lua-lua>
-  push_notification_driver = lua:file=/etc/dovecot/push_notification.lua
+  push_notification_driver = lua:file={{ config_dir }}/push_notification.lua
 }
 
 service lmtp {
@@ -254,7 +254,7 @@ service anvil {
 ssl = required
 ssl_cert = <{{ config.tls_cert_path }}
 ssl_key = <{{ config.tls_key_path }}
-ssl_dh = </usr/share/dovecot/dh.pem
+ssl_dh = <{{ dh_path }}
 ssl_min_protocol = TLSv1.3
 ssl_prefer_server_ciphers = yes
 

cmdeploy/src/cmdeploy/nginx/deployer.py

@@ -55,6 +55,10 @@ def _configure_nginx(deployer, config: Config, debug: bool = False):
         "/etc/nginx/nginx.conf",
         config=config,
         disable_ipv6=config.disable_ipv6,
+        config_dir="/etc/nginx",
+        stream_module="modules/ngx_stream_module.so",
+        www_root="/var/www/html",
+        cgi_dir="/usr/lib/cgi-bin",
     )
 
     deployer.put_template(

cmdeploy/src/cmdeploy/nginx/nginx.conf.j2

@@ -1,4 +1,4 @@
-load_module modules/ngx_stream_module.so;
+{% if stream_module %}load_module {{ stream_module }};{% endif %}
 
 user www-data;
 worker_processes auto;
@@ -54,7 +54,7 @@ http {
 	# Do not emit nginx version on error pages.
 	server_tokens off;
 
-	include /etc/nginx/mime.types;
+	include {{ config_dir }}/mime.types;
 	default_type application/octet-stream;
 
 	ssl_protocols TLSv1.2 TLSv1.3;
@@ -68,13 +68,14 @@ http {
   
 		listen 127.0.0.1:8443 ssl default_server;
 
-		root /var/www/html;
+		root {{ www_root }};
 
 		index index.html index.htm;
 
 		server_name {{ config.mail_domain }} mta-sts.{{ config.mail_domain }};
 
 		location /mxdeliv {
+		    client_max_body_size {{ config.max_message_size }};
 		    proxy_pass http://127.0.0.1:{{ config.filtermail_http_port_incoming }};
 		}
 
@@ -96,8 +97,8 @@ http {
 {% endif %}
 
 			fastcgi_pass unix:/run/fcgiwrap.socket;
-			include /etc/nginx/fastcgi_params;
-			fastcgi_param SCRIPT_FILENAME /usr/lib/cgi-bin/newemail.py;
+			include {{ config_dir }}/fastcgi_params;
+			fastcgi_param SCRIPT_FILENAME {{ cgi_dir }}/newemail.py;
 		}
 
 		# Old URL for compatibility with e.g. printed QR codes.
@@ -114,8 +115,8 @@ http {
 {% endif %}
 
 			fastcgi_pass unix:/run/fcgiwrap.socket;
-			include /etc/nginx/fastcgi_params;
-			fastcgi_param SCRIPT_FILENAME /usr/lib/cgi-bin/newemail.py;
+			include {{ config_dir }}/fastcgi_params;
+			fastcgi_param SCRIPT_FILENAME {{ cgi_dir }}/newemail.py;
 		}
 
                 # Proxy to iroh-relay service.

cmdeploy/src/cmdeploy/opendkim/KeyTable

@@ -1 +1 @@
-{{ config.opendkim_selector }}._domainkey.{{ config.domain_name }} {{ config.domain_name }}:{{ config.opendkim_selector }}:/etc/dkimkeys/{{ config.opendkim_selector }}.private
+{{ config.opendkim_selector }}._domainkey.{{ config.domain_name }} {{ config.domain_name }}:{{ config.opendkim_selector }}:{{ keys_dir }}/{{ config.opendkim_selector }}.private

cmdeploy/src/cmdeploy/opendkim/deployer.py

@@ -30,6 +30,8 @@ class OpendkimDeployer(Deployer):
             "opendkim/opendkim.conf",
             "/etc/opendkim.conf",
             config={"domain_name": domain, "opendkim_selector": dkim_selector},
+            keys_dir="/etc/dkimkeys",
+            trust_anchor="/usr/share/dns/root.key",
         )
 
         self.remove_file("/etc/opendkim/screen.lua")
@@ -46,6 +48,7 @@ class OpendkimDeployer(Deployer):
             "/etc/dkimkeys/KeyTable",
             owner="opendkim",
             config={"domain_name": domain, "opendkim_selector": dkim_selector},
+            keys_dir="/etc/dkimkeys",
         )
 
         self.put_template(

cmdeploy/src/cmdeploy/opendkim/opendkim.conf

@@ -21,9 +21,9 @@ DNSTimeout          60
 # setup options can be found in /usr/share/doc/opendkim/README.opendkim.
 Domain			{{ config.domain_name }}
 Selector		{{ config.opendkim_selector }}
-KeyFile		  /etc/dkimkeys/{{ config.opendkim_selector }}.private
-KeyTable          /etc/dkimkeys/KeyTable
-SigningTable      refile:/etc/dkimkeys/SigningTable
+KeyFile		  {{ keys_dir }}/{{ config.opendkim_selector }}.private
+KeyTable          {{ keys_dir }}/KeyTable
+SigningTable      refile:{{ keys_dir }}/SigningTable
 
 # Sign Autocrypt header in addition to the default specified in RFC 6376.
 #
@@ -58,7 +58,7 @@ PidFile			/run/opendkim/opendkim.pid
 
 # The trust anchor enables DNSSEC. In Debian, the trust anchor file is provided
 # by the package dns-root-data.
-TrustAnchorFile		/usr/share/dns/root.key
+TrustAnchorFile		{{ trust_anchor }}
 
 # Sign messages when `-o milter_macro_daemon_name=ORIGINATING` is set.
 MTA ORIGINATING

cmdeploy/src/cmdeploy/pins.py

@@ -1,14 +1,14 @@
 """Versions, hashes, and download URLs for pre-built artifacts fetched during deploy."""
 
-FILTERMAIL_VERSION = "v0.7.4"
+FILTERMAIL_VERSION = "v0.7.7"
 FILTERMAIL_ARTIFACTS = {
     "x86_64": (
         f"https://github.com/chatmail/filtermail/releases/download/{FILTERMAIL_VERSION}/filtermail-x86_64",
-        "484cb8dff083134aefba9fce4a6b7ef4784a0f0e28e5108ecf8bb9e58a44fd2c",
+        "0691debf501f854f4e6a9dd6516f3a0ef03d95721a9b540309014bfe1a1f52b1",
     ),
     "aarch64": (
         f"https://github.com/chatmail/filtermail/releases/download/{FILTERMAIL_VERSION}/filtermail-aarch64",
-        "66aa0ca2ca9add7a12d92883d76f8786384092adfde24a3d3a1d0b1f30d23a9e",
+        "964f85df8b65b812666113f968cbfdd8da88ce16d218284deb359c1e2400d2da",
     ),
     "mtail": (
         f"https://raw.githubusercontent.com/chatmail/filtermail/{FILTERMAIL_VERSION}/contrib/filtermail.mtail",
@@ -36,6 +36,8 @@ DOVECOT_SHA256 = {
     ("imapd", "arm64"): "178fa877ddd5df9930e8308b518f4b07df10e759050725f8217a0c1fb3fd707f",
     ("lmtpd", "amd64"): "2f69ba5e35363de50962d42cccbfe4ed8495265044e244007d7ccddad77513ab",
     ("lmtpd", "arm64"): "89f52fb36524f5877a177dff4a713ba771fd3f91f22ed0af7238d495e143b38f",
+    ("auth-lua", "amd64"): "d724f37712faba52e177153114af1831e54da555c57c6474c05f96f176176ce4",
+    ("auth-lua", "arm64"): "7272768e20de148c35891d99cd60205acbe7e732b056caf0a83e8194d49136e6",
 }
 TURN_VERSION = "v0.4"
 TURN_ARTIFACTS = {

cmdeploy/src/cmdeploy/postfix/deployer.py

@@ -24,6 +24,8 @@ class PostfixDeployer(Deployer):
             "/etc/postfix/main.cf",
             config=config,
             disable_ipv6=config.disable_ipv6,
+            config_dir="/etc/postfix",
+            ca_path="/etc/ssl/certs",
         )
 
         self.put_template(
@@ -31,6 +33,7 @@ class PostfixDeployer(Deployer):
             "/etc/postfix/master.cf",
             debug=False,
             config=config,
+            config_dir="/etc/postfix",
         )
 
         self.put_file(

cmdeploy/src/cmdeploy/postfix/main.cf.j2

@@ -19,13 +19,13 @@ smtpd_tls_cert_file={{ config.tls_cert_path }}
 smtpd_tls_key_file={{ config.tls_key_path }}
 smtpd_tls_security_level=may
 
-smtp_tls_CApath=/etc/ssl/certs
+smtp_tls_CApath={{ ca_path }}
 smtp_tls_security_level=verify
 # Send SNI extension when connecting to other servers.
 # <https://www.postfix.org/postconf.5.html#smtp_tls_servername>
 smtp_tls_servername = hostname
 smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
-smtp_tls_policy_maps = regexp:/etc/postfix/smtp_tls_policy_map
+smtp_tls_policy_maps = regexp:{{ config_dir }}/smtp_tls_policy_map
 smtp_tls_protocols = >=TLSv1.2
 smtp_tls_mandatory_protocols = >=TLSv1.2
 
@@ -83,7 +83,7 @@ inet_protocols = ipv4
 inet_protocols = all
 {% endif %}
 
-lmtp_header_checks = regexp:/etc/postfix/lmtp_header_cleanup
+lmtp_header_checks = regexp:{{ config_dir }}/lmtp_header_cleanup
 
 # Do not apply header checks to MIME headers
 # and other headers that are actually part of the message body.
@@ -98,7 +98,7 @@ mua_sender_restrictions = reject_sender_login_mismatch, permit_sasl_authenticate
 mua_helo_restrictions = permit_mynetworks, reject_invalid_helo_hostname, reject_non_fqdn_helo_hostname, permit
 
 # 1:1 map MAIL FROM to SASL login name.
-smtpd_sender_login_maps = regexp:/etc/postfix/login_map
+smtpd_sender_login_maps = regexp:{{ config_dir }}/login_map
 
 # Do not lookup SMTP client hostnames to reduce delays
 # and avoid unnecessary DNS requests.

cmdeploy/src/cmdeploy/postfix/master.cf.j2

@@ -102,7 +102,7 @@ postlog   unix-dgram n  -       n       -       1       postlogd
 # to make sure the users
 # cannot send unprotected Subject.
 authclean unix  n       -       -       -       0       cleanup
-  -o header_checks=regexp:/etc/postfix/submission_header_cleanup
+  -o header_checks=regexp:{{ config_dir }}/submission_header_cleanup
 
 # Reducing `maxproc` here may result in a head of line blocking
 # when there are many messages sent to unreachable destinations

cmdeploy/src/cmdeploy/service/doveauth.service.f

@@ -1,12 +1,11 @@
 [Unit]
-Description=Chatmail dict authentication proxy for dovecot
+Description=Chatmail HTTP authentication service for dovecot
 
 [Service]
-ExecStart={execpath} /run/doveauth/doveauth.socket {config_path}
+ExecStart={execpath} {config_path}
 Restart=always
-RestartSec=30
+RestartSec=5
 User=vmail
-RuntimeDirectory=doveauth
 UMask=0077
 
 [Install]

cmdeploy/src/cmdeploy/tests/conftest.py

@@ -1,9 +1,11 @@
 """Run the lua scripts we ship under lupa, which bundles Lua 5.4 like dovecot."""
 
 import pytest
+from chatmaild.tests.plugin import *  # noqa: F403
 from lupa import lua54
 
 from cmdeploy.basedeploy import get_resource
+from cmdeploy.tests.plugin import *  # noqa: F403
 
 
 class Lua:

cmdeploy/src/cmdeploy/tests/online/test_0_login.py

@@ -91,7 +91,7 @@ def test_concurrent_logins_same_account(
 
 def test_no_vrfy(cmfactory, chatmail_config, maildomain):
     ac = cmfactory.get_online_account()
-    addr = ac.get_config("addr")
+    addr = ac.list_transports()[0]["addr"]
 
     s = smtplib.SMTP(maildomain)
     s.starttls()

cmdeploy/src/cmdeploy/tests/online/test_0_qr.py

@@ -20,17 +20,17 @@ def test_fastcgi_working(maildomain, chatmail_config):
 
 
 @pytest.mark.filterwarnings("ignore::urllib3.exceptions.InsecureRequestWarning")
-def test_newemail_configure(maildomain, rpc, chatmail_config):
+def test_newemail_configure(maildomain, cmrpc, chatmail_config):
     """Test configuring accounts by scanning a QR code works."""
     url = f"DCACCOUNT:https://{maildomain}/new"
     for i in range(3):
-        account_id = rpc.add_account()
+        account_id = cmrpc.add_account()
         if chatmail_config.tls_cert_mode == "self":
             # deltachat core's rustls rejects self-signed HTTPS certs during
             # set_config_from_qr, so fetch credentials via requests instead
             res = requests.post(f"https://{maildomain}/new", verify=False)
             data = res.json()
-            rpc.add_or_update_transport(account_id, {
+            cmrpc.add_or_update_transport(account_id, {
                 "addr": data["email"],
                 "password": data["password"],
                 "imapServer": maildomain,
@@ -38,4 +38,4 @@ def test_newemail_configure(maildomain, rpc, chatmail_config):
                 "certificateChecks": "acceptInvalidCertificates",
             })
         else:
-            rpc.add_transport_from_qr(account_id, url)
+            cmrpc.add_transport_from_qr(account_id, url)

cmdeploy/src/cmdeploy/tests/online/test_1_basic.py

@@ -5,6 +5,7 @@ import subprocess
 import time
 
 import pytest
+import requests
 from chatmaild.config import is_valid_ipv4
 
 from cmdeploy import remote
@@ -132,8 +133,8 @@ def test_use_two_chatmailservers(cmfactory, maildomain2):
     ac1 = cmfactory.get_online_account()
     ac2 = cmfactory.get_online_account(domain=maildomain2)
     cmfactory.get_accepted_chat(ac1, ac2)
-    domain1 = ac1.get_config("addr").split("@")[1]
-    domain2 = ac2.get_config("addr").split("@")[1]
+    domain1 = ac1.list_transports()[0]["addr"].split("@")[1]
+    domain2 = ac2.list_transports()[0]["addr"].split("@")[1]
     assert domain1 != domain2
 
 
@@ -326,3 +327,14 @@ def test_nginx_access_log_only_defined_once(sshdomain):
     assert len(access_logs) == 1, (
         f"expected 1 access_log, found {len(access_logs)}: {access_logs}"
     )
+
+
+@pytest.mark.filterwarnings("ignore::urllib3.exceptions.InsecureRequestWarning")
+def test_mxdeliv_respects_max_message_size(maildomain, chatmail_config):
+    url = f"https://{maildomain}/mxdeliv"
+    verify = chatmail_config.tls_cert_mode == "acme"
+    size = chatmail_config.max_message_size
+    res = requests.post(url, data=b"x" * size, verify=verify)
+    assert res.text == "500 Invalid DATA"
+    res = requests.post(url, data=b"x" * (size + 1), verify=verify)
+    assert res.status_code == 413

cmdeploy/src/cmdeploy/tests/online/test_2_deltachat.py

@@ -15,8 +15,10 @@ from cmdeploy.remote import rshell
 @pytest.fixture
 def imap_mailbox(cmfactory, ssl_context):
     (ac1,) = cmfactory.get_online_accounts(1)
-    user = ac1.get_config("addr")
-    password = ac1.get_config("mail_pw")
+    # Delta Chat 2.63 stopped writing the legacy addr and mail_pw config keys.
+    transport = ac1.list_transports()[0]
+    user = transport["addr"]
+    password = transport["password"]
     host = user.split("@")[1].strip("[").strip("]")
     mailbox = imap_tools.MailBox(host, ssl_context=ssl_context)
     mailbox.login(user, password)
@@ -88,7 +90,7 @@ class TestEndToEndDeltaChat:
         ac1, ac2 = cmfactory.get_online_accounts(2)
         chat = cmfactory.get_accepted_chat(ac1, ac2)
 
-        user = ac2.get_config("configured_addr")
+        user = ac2.list_transports()[0]["addr"]
 
         def parse_size_limit(limit: str) -> int:
             """Parse a size limit and return the number of bytes as integer.
@@ -190,9 +192,10 @@ def test_hide_senders_ip_address(cmfactory, ssl_context):
 
     chat.send_text("testing submission header cleanup")
     user2.wait_for_incoming_msg()
-    addr = user2.get_config("addr")
+    transport = user2.list_transports()[0]
+    addr = transport["addr"]
     host = addr.split("@")[1].strip("[").strip("]")
-    pw = user2.get_config("mail_pw")
+    pw = transport["password"]
     mailbox = imap_tools.MailBox(host, ssl_context=ssl_context)
     mailbox.login(addr, pw)
     msgs = list(mailbox.fetch(mark_seen=False))

cmdeploy/src/cmdeploy/tests/plugin.py

@@ -18,14 +18,8 @@ def format_mail_domain(raw_domain: str) -> str:
     return raw_domain
 
 
-conftestdir = Path(__file__).parent
-
-
 def pytest_configure(config):
     config._benchresults = {}
-    config.addinivalue_line(
-        "markers", "slow: mark test to require --slow option to run"
-    )
 
 
 def _get_chatmail_config():
@@ -377,8 +371,12 @@ class ChatmailACFactory:
 
 
 @pytest.fixture(scope="session")
-def rpc(tmp_path_factory):
-    """Start a deltachat-rpc-server process for the test session."""
+def cmrpc(tmp_path_factory):
+    """Start a deltachat-rpc-server process for the test session.
+
+    Not named "rpc": the deltachat-rpc-client pytest plugin registers a
+    function-scoped fixture under that name and would shadow this one.
+    """
 
     # NB: accounts_dir must NOT already exist as directory --
     # core-rust only creates accounts.toml if the dir doesn't exist yet.
@@ -390,10 +388,10 @@ def rpc(tmp_path_factory):
 
 
 @pytest.fixture
-def cmfactory(rpc, gencreds, maildomain, chatmail_config):
+def cmfactory(cmrpc, gencreds, maildomain, chatmail_config):
     """Return a ChatmailACFactory for creating online Delta Chat accounts."""
     return ChatmailACFactory(
-        rpc=rpc,
+        rpc=cmrpc,
         maildomain=maildomain,
         gencreds=gencreds,
         chatmail_config=chatmail_config,

cmdeploy/src/cmdeploy/tests/pytest.ini

@@ -1,2 +0,0 @@
-[pytest]
-addopts = -vrsx --strict-markers

cmdeploy/src/cmdeploy/tests/test_authlua.py

@@ -0,0 +1,216 @@
+"""Test auth.lua script against mocked dovecot auth API."""
+
+import jinja2
+import pytest
+from chatmaild.doveauth import encrypt_password, verify_password
+
+from cmdeploy.basedeploy import get_resource
+
+USER1 = "user12345@chat.example.org"
+USER2 = "newuser12@chat.example.org"
+OK, UNKNOWN, MISMATCH, INTERNAL = 1, -2, -3, -4
+
+DOVECOT_MOCKS = """
+create_status = 200
+
+dovecot = {
+  auth = {
+    PASSDB_RESULT_OK = OK,
+    PASSDB_RESULT_USER_UNKNOWN = UNKNOWN,
+    PASSDB_RESULT_PASSWORD_MISMATCH = MISMATCH,
+    PASSDB_RESULT_INTERNAL_FAILURE = INTERNAL,
+    USERDB_RESULT_OK = OK,
+    USERDB_RESULT_USER_UNKNOWN = UNKNOWN,
+  },
+  http = {
+    client = function(options)
+      client_options = options
+      return {request = function(_, options)
+        create_request = options
+        return {
+          set_payload = function(_, payload) create_payload = payload end,
+          submit = function()
+            return {status = function() return create_status end}
+          end,
+        }
+      end}
+    end,
+  },
+}
+"""
+
+
+def load_authlua(lua, config):
+    lua.g.OK, lua.g.UNKNOWN = OK, UNKNOWN
+    lua.g.MISMATCH, lua.g.INTERNAL = MISMATCH, INTERNAL
+    lua.rt.execute(DOVECOT_MOCKS)
+    template = jinja2.Template(get_resource("dovecot/auth.lua.j2").read_text())
+    lua.rt.execute(template.render(config=config))
+    assert lua.g.script_init() == 0
+    return lua
+
+
+@pytest.fixture
+def authlua(lua, example_config):
+    return load_authlua(lua, example_config)
+
+
+@pytest.fixture
+def request_for(lua):
+    def request_for(addr):
+        def password_verify(_self, hashed, plain):
+            return 1 if verify_password(hashed, plain) else 0
+
+        return lua.table(user=addr, password_verify=password_verify)
+
+    return request_for
+
+
+@pytest.fixture
+def create_user(example_config):
+    def create_user(addr, password):
+        example_config.get_user(addr).set_password(encrypt_password(password))
+
+    return create_user
+
+
+@pytest.fixture
+def write_password_file(example_config):
+    def write_password_file(addr, content):
+        maildir = example_config.mailboxes_dir / addr
+        maildir.mkdir(parents=True, exist_ok=True)
+        maildir.joinpath("password").write_text(content)
+
+    return write_password_file
+
+
+def test_http_client_uses_dovecot_setting_names(authlua):
+    """dovecot's lua http binding silently ignores keys it does not know."""
+    assert dict(authlua.g.client_options) == {
+        "request_timeout_msecs": 5000,
+        "max_attempts": 1,
+    }
+
+
+def test_existing_address_correct_password(authlua, request_for, create_user):
+    create_user(USER1, "correctgoose")
+    res, fields = authlua.g.auth_password_verify(request_for(USER1), "correctgoose")
+    assert res == OK
+    assert fields["uid"] == fields["gid"] == "vmail"
+    assert fields["home"].endswith(USER1)
+    assert authlua.g.create_payload is None
+
+
+def test_existing_address_wrong_password(authlua, request_for, create_user):
+    create_user(USER1, "correctgoose")
+    res, _ = authlua.g.auth_password_verify(request_for(USER1), "wronghorse")
+    assert res == MISMATCH
+
+
+def test_foreign_domain_is_refused_without_calling_out(
+    authlua, request_for, create_user
+):
+    create_user("user12345@evil.example.org", "correctgoose")
+    request = request_for("user12345@evil.example.org")
+    res, _ = authlua.g.auth_password_verify(request, "correctgoose")
+    assert res == UNKNOWN
+    assert authlua.g.auth_userdb_lookup(request)[0] == UNKNOWN
+    assert authlua.g.create_payload is None
+
+
+def test_name_shorter_than_the_domain_is_refused(authlua, request_for):
+    for name in ("x", "", "chat.example.org"):
+        res, _ = authlua.g.auth_password_verify(request_for(name), "correctgoose")
+        assert res == UNKNOWN
+        assert authlua.g.auth_userdb_lookup(request_for(name))[0] == UNKNOWN
+    assert authlua.g.create_payload is None
+
+
+def test_slash_in_username_is_refused(authlua, request_for):
+    request = request_for("../../etc/shadow@chat.example.org")
+    res, _ = authlua.g.auth_password_verify(request, "somepassword")
+    assert res == UNKNOWN
+    assert authlua.g.auth_userdb_lookup(request)[0] == UNKNOWN
+    assert authlua.g.create_payload is None
+
+
+def test_localpart_policy_is_left_to_doveauth(authlua, request_for):
+    authlua.g.create_status = 403
+    res, _ = authlua.g.auth_password_verify(request_for("@chat.example.org"), "somepw")
+    assert res == UNKNOWN
+    assert authlua.g.create_payload == "@chat.example.org\tsomepw"
+
+
+def test_unknown_address_is_created_via_endpoint(authlua, request_for):
+    res, fields = authlua.g.auth_password_verify(request_for(USER2), "brandnewpass")
+    assert res == OK
+    assert fields["home"].endswith(USER2)
+    assert authlua.g.create_payload == f"{USER2}\tbrandnewpass"
+    assert authlua.g.create_request["url"] == "http://127.0.0.1:10084/create"
+
+
+# doveauth refusing is the user's problem, doveauth failing is ours
+@pytest.mark.parametrize("status", [400, 403, 404])
+def test_creation_refused_by_doveauth_is_user_unknown(authlua, request_for, status):
+    authlua.g.create_status = status
+    res, _ = authlua.g.auth_password_verify(request_for(USER2), "brandnewpass")
+    assert res == UNKNOWN
+
+
+# 9003 is dovecot's own CONNECT_FAILED, what a stopped doveauth actually yields
+@pytest.mark.parametrize("status", [500, 502, 9003, 9005])
+def test_creation_that_doveauth_could_not_answer_is_internal_failure(
+    authlua, request_for, status
+):
+    authlua.g.create_status = status
+    res, _ = authlua.g.auth_password_verify(request_for(USER2), "brandnewpass")
+    assert res == INTERNAL
+
+
+def test_userdb_unknown_before_creation_ok_after(authlua, request_for, create_user):
+    request = request_for(USER1)
+    res, _ = authlua.g.auth_userdb_lookup(request)
+    assert res == UNKNOWN
+    # a userdb lookup must never create anything
+    assert authlua.g.create_payload is None
+
+    create_user(USER1, "correctgoose")
+    res, fields = authlua.g.auth_userdb_lookup(request)
+    assert res == OK
+    assert fields["home"].endswith(USER1)
+    assert fields["uid"] == fields["gid"] == "vmail"
+
+
+def test_empty_password_file_is_unknown(authlua, request_for, write_password_file):
+    write_password_file(USER1, "")
+    assert authlua.g.auth_userdb_lookup(request_for(USER1))[0] == UNKNOWN
+
+    write_password_file(USER1, "\n")
+    assert authlua.g.auth_userdb_lookup(request_for(USER1))[0] == UNKNOWN
+
+
+def test_password_file_format_checks(authlua, request_for, write_password_file):
+    write_password_file(USER1, encrypt_password("correctgoose") + "\n")
+    res, _ = authlua.g.auth_password_verify(request_for(USER1), "correctgoose")
+    assert res == OK
+    assert authlua.g.auth_userdb_lookup(request_for(USER1))[0] == OK
+
+    passhash = encrypt_password("correctgoose")
+    write_password_file(USER1, passhash + "\ntrailing junk")
+    authlua.g.create_status = 403
+    res, _ = authlua.g.auth_password_verify(request_for(USER1), "correctgoose")
+    assert res == UNKNOWN
+    assert authlua.g.auth_userdb_lookup(request_for(USER1))[0] == UNKNOWN
+
+
+def test_ipv4_relay_uses_bracketed_domain(lua, ipv4_config, request_for):
+    # mail_domain is "[1.3.3.7]" here, and is_ours must not read it as a pattern
+    authlua = load_authlua(lua, ipv4_config)
+    addr = f"user12345@{ipv4_config.mail_domain}"
+    ipv4_config.get_user(addr).set_password(encrypt_password("correctgoose"))
+
+    res, fields = authlua.g.auth_password_verify(request_for(addr), "correctgoose")
+    assert res == OK
+    assert fields["home"].endswith(addr)
+    assert authlua.g.auth_userdb_lookup(request_for(addr))[0] == OK
+    assert authlua.g.auth_userdb_lookup(request_for(USER1))[0] == UNKNOWN

cmdeploy/src/cmdeploy/tests/test_dovecot_deployer.py

@@ -136,6 +136,7 @@ def test_install_skips_dpkg_path_when_epoch_matched_packages_present(
                     "dovecot-core": [dovecot_deployer.DOVECOT_PACKAGE_VERSION],
                     "dovecot-imapd": [dovecot_deployer.DOVECOT_PACKAGE_VERSION],
                     "dovecot-lmtpd": [dovecot_deployer.DOVECOT_PACKAGE_VERSION],
+                    "dovecot-auth-lua": [dovecot_deployer.DOVECOT_PACKAGE_VERSION],
                 },
             ),
             (dovecot_deployer.Arch, "x86_64"),
@@ -180,9 +181,12 @@ def test_install_unsupported_arch_falls_back_to_apt(
     deployer.install()
 
     actual_pkgs = [c["packages"] for c in apt_calls]
-    assert actual_pkgs == [["dovecot-core"], ["dovecot-imapd"], ["dovecot-lmtpd"]], (
-        f"expected apt install of core/imapd/lmtpd, got {actual_pkgs}"
-    )
+    assert actual_pkgs == [
+        ["dovecot-core"],
+        ["dovecot-imapd"],
+        ["dovecot-lmtpd"],
+        ["dovecot-auth-lua"],
+    ], f"expected apt install of core/imapd/lmtpd/auth-lua, got {actual_pkgs}"
     assert track_shell == [], "should not run dpkg for unsupported arch"
     assert deployer.need_restart is True, (
         "need_restart should be True when apt installed a package"

doc/source/faq.rst

@@ -63,9 +63,17 @@ and run the following commands:
        scripts/initenv.sh
        scripts/cmdeploy run
 
-If you don't want the latest development version,
-but a specific tagged release like `1.10.0 <https://github.com/chatmail/relay/releases/tag/1.10.0>`_,
-run ``git pull origin 1.10.0`` instead.
+To upgrade to the latest tag,
+``cd`` into your local checkout of https://github.com/chatmail/relay/
+and run the following commands:
+
+   ::
+
+       git fetch --tags
+       latestTag=$(git describe --tags "$(git rev-list --tags --max-count=1)")
+       git checkout $latestTag
+       scripts/initenv.sh
+       scripts/cmdeploy run
 
 If you made local changes for your setup,
 they will be reapplied as long as they don't conflict with the upgrade.

doc/source/overview.rst

@@ -84,11 +84,12 @@ and only relaying OpenPGP end-to-end messages encrypted messages. A
 short overview of ``chatmaild`` services:
 
 -  :repofile:`doveauth <chatmaild/src/chatmaild/doveauth.py>`
-   implements create-on-login address semantics and is used by Dovecot
-   during IMAP login and by Postfix during SMTP/SUBMISSION login which
-   in turn uses `Dovecot SASL
-   <https://doc.dovecot.org/2.3/configuration_manual/authentication/dict/#complete-example-for-authenticating-via-a-unix-socket>`_
-   to authenticate logins.
+   implements create-on-login address semantics.
+   Dovecot authenticates IMAP logins, and Postfix SMTP/SUBMISSION logins through `Dovecot SASL
+   <https://doc.dovecot.org/2.3/configuration_manual/authentication/authentication_mechanisms/>`_,
+   from an :repofile:`auth.lua <cmdeploy/src/cmdeploy/dovecot/auth.lua.j2>` script
+   that reads the maildir directly. Only addresses which do not exist yet
+   are passed on to doveauth, which owns the creation policy.
 
 -  :repofile:`chatmail-metadata <chatmaild/src/chatmaild/metadata.py>`
    is contacted by a
@@ -155,7 +156,7 @@ Chatmail relay dependency diagram
         filtermail-outgoing --- |10025 reinject|postfix;
         filtermail-incoming --- |10026 reinject|postfix;
         postfix --- |milter opendkim.sock|OpenDKIM
-        dovecot --- |doveauth.socket|doveauth;
+        dovecot --- |10084 create|doveauth;
         dovecot --- |message delivery|maildir["maildir
         /home/vmail/.../user"];
         dovecot --- |lastlogin.socket|lastlogin;

scripts/initenv.sh

@@ -20,6 +20,10 @@ fi
 
 python3 -m venv --upgrade-deps venv
 
+# an editable install puts src/ on sys.path, so a leftover egg-info there is
+# found as a second distribution and keeps removed entry points registered
+rm -rf chatmaild/src/*.egg-info cmdeploy/src/*.egg-info
+
 venv/bin/pip install -e chatmaild 
 venv/bin/pip install -e cmdeploy
 venv/bin/pip install sphinx sphinxcontrib-mermaid sphinx-autobuild furo  # for building the docs