Sandbox chatmail-metadata

These options are suggested by
`systemd-analyze security echobot.service`

.github/workflows/test-and-deploy.yaml

@@ -4,12 +4,17 @@ on:
   push:
     branches:
       - main
-      - staging-ci
+  pull_request:
+    paths-ignore:
+      - 'scripts/**'
 
 jobs:
   deploy:
     name: deploy on staging.testrun.org, and run tests
     runs-on: ubuntu-latest
+    concurrency:
+      group: staging-deploy
+      cancel-in-progress: true
     steps:
       - uses: actions/checkout@v3
 
@@ -19,44 +24,45 @@ jobs:
           echo "${{ secrets.STAGING_SSH_KEY }}" >> ~/.ssh/id_ed25519
           chmod 600 ~/.ssh/id_ed25519
           ssh-keyscan staging.testrun.org > ~/.ssh/known_hosts
-     #    rsync -avz root@staging.testrun.org:/var/lib/acme . || true
+          rsync -avz root@staging.testrun.org:/var/lib/acme . || true
-     #    rsync -avz root@staging.testrun.org:/var/lib/rspamd/dkim . || true
+          rsync -avz root@staging.testrun.org:/etc/dkimkeys . || true
 
-     #- name: rebuild staging.testrun.org to have a clean VPS
+      - name: rebuild staging.testrun.org to have a clean VPS
-     #  run: |
+        run: |
-     #      curl -X POST \
+            curl -X POST \
-     #      -H "Authorization: Bearer ${{ secrets.HETZNER_API_TOKEN }}" \
+            -H "Authorization: Bearer ${{ secrets.HETZNER_API_TOKEN }}" \
-     #      -H "Content-Type: application/json" \
+            -H "Content-Type: application/json" \
-     #      -d '{"image":"debian-12"}' \
+            -d '{"image":"debian-12"}' \
-     #      "https://api.hetzner.cloud/v1/servers/${{ secrets.STAGING_SERVER_ID }}/actions/rebuild"
+            "https://api.hetzner.cloud/v1/servers/${{ secrets.STAGING_SERVER_ID }}/actions/rebuild"
 
       - run: scripts/initenv.sh
 
       - name: append venv/bin to PATH
         run: echo venv/bin >>$GITHUB_PATH
 
+      - name: upload TLS cert after rebuilding
+        run: |
+          echo " --- wait until staging.testrun.org VPS is rebuilt --- "
+          rm ~/.ssh/known_hosts
+          while ! ssh -o ConnectTimeout=180 -o StrictHostKeyChecking=accept-new -v root@staging.testrun.org id -u ; do sleep 1 ; done
+          ssh -o StrictHostKeyChecking=accept-new -v root@staging.testrun.org id -u
+          rsync -avz acme/ root@staging.testrun.org:/var/lib/acme || true
+          rsync -avz dkimkeys/ root@staging.testrun.org:/etc/dkimkeys || true
+          ssh -o StrictHostKeyChecking=accept-new -v root@staging.testrun.org chown root:root -R /var/lib/acme
+
       - name: run formatting checks 
         run: cmdeploy fmt -v 
 
       - name: run deploy-chatmail offline tests 
         run: pytest --pyargs cmdeploy 
 
-     #- name: upload TLS cert after rebuilding
-     #  run: |
-     #    echo " --- wait until staging.testrun.org VPS is rebuilt --- "
-     #    rm ~/.ssh/known_hosts
-     #    while ! ssh -o ConnectTimeout=180 -o StrictHostKeyChecking=accept-new -v root@staging.testrun.org id -u ; do sleep 1 ; done
-     #    ssh -o StrictHostKeyChecking=accept-new -v root@staging.testrun.org id -u
-     #    rsync -avz acme root@staging.testrun.org:/var/lib/ || true
-     #    rsync -avz dkim root@staging.testrun.org:/var/lib/rspamd/ || true
-
       - run: cmdeploy init staging.testrun.org
 
       - run: cmdeploy run
 
       - name: set DNS entries
         run: |
-          #ssh -o StrictHostKeyChecking=accept-new -v root@staging.testrun.org chown _rspamd:_rspamd -R /var/lib/rspamd/dkim
+          ssh -o StrictHostKeyChecking=accept-new -v root@staging.testrun.org chown opendkim:opendkim -R /etc/dkimkeys
           cmdeploy dns --zonefile staging-generated.zone
           cat staging-generated.zone >> .github/workflows/staging.testrun.org-default.zone
           cat .github/workflows/staging.testrun.org-default.zone

CHANGELOG.md

@@ -1,8 +1,23 @@
 # Changelog for chatmail deployment 
 
-## unreleased
+## untagged 
 
-### Changes since March 15th, 2024
+- Run chatmail-metadata and doveauth as vmail
+  ([#261](https://github.com/deltachat/chatmail/pull/261))
+
+- Apply systemd restrictions to echobot
+  ([#259](https://github.com/deltachat/chatmail/pull/259))
+
+- re-enable running the CI in pull requests, but not concurrently 
+  ([#258](https://github.com/deltachat/chatmail/pull/258))
+
+
+## 1.1.0 - 2024-03-28
+
+### The changelog starts to record changes from March 15th, 2024 
+
+- Move systemd unit templates to cmdeploy package 
+  ([#255](https://github.com/deltachat/chatmail/pull/255))
 
 - Persist push tokens and support multiple device per address 
   ([#254](https://github.com/deltachat/chatmail/pull/254))

chatmaild/MANIFEST.in

@@ -1,4 +1,3 @@
-include src/chatmaild/*.f 
 include src/chatmaild/ini/*.ini.f
 include src/chatmaild/ini/*.ini
 include src/chatmaild/tests/mail-data/*

cmdeploy/src/cmdeploy/__init__.py

@@ -135,20 +135,6 @@ def _configure_opendkim(domain: str, dkim_selector: str = "dkim") -> bool:
     """Configures OpenDKIM"""
     need_restart = False
 
-    server.group(name="Create opendkim group", group="opendkim", system=True)
-    server.user(
-        name="Create opendkim user",
-        user="opendkim",
-        groups=["opendkim"],
-        system=True,
-    )
-    server.user(
-        name="Add postfix user to opendkim group for socket access",
-        user="postfix",
-        groups=["opendkim"],
-        system=True,
-    )
-
     main_config = files.template(
         src=importlib.resources.files(__package__).joinpath("opendkim/opendkim.conf"),
         dest="/etc/opendkim.conf",
@@ -476,9 +462,29 @@ def deploy_chatmail(config_path: Path) -> None:
 
     from .www import build_webpages
 
-    apt.update(name="apt update", cache_time=24 * 3600)
     server.group(name="Create vmail group", group="vmail", system=True)
     server.user(name="Create vmail user", user="vmail", group="vmail", system=True)
+    server.group(name="Create opendkim group", group="opendkim", system=True)
+    server.user(
+        name="Create opendkim user",
+        user="opendkim",
+        groups=["opendkim"],
+        system=True,
+    )
+    server.user(
+        name="Add postfix user to opendkim group for socket access",
+        user="postfix",
+        groups=["opendkim"],
+        system=True,
+    )
+
+    server.shell(
+        name="Fix file owner in /home/vmail",
+        commands=["test -d /home/vmail && chown -R vmail:vmail /home/vmail"],
+    )
+
+    apt.update(name="apt update", cache_time=24 * 3600)
+
     apt.packages(
         name="Install rsync",
         packages=["rsync"],
@@ -565,14 +571,9 @@ def deploy_chatmail(config_path: Path) -> None:
         restarted=mta_sts_need_restart,
     )
 
-    systemd.service(
+    # Dovecot should be started before Postfix
-        name="Start and enable Postfix",
+    # because it creates authentication socket
-        service="postfix.service",
+    # required by Postfix.
-        running=True,
-        enabled=True,
-        restarted=postfix_need_restart,
-    )
-
     systemd.service(
         name="Start and enable Dovecot",
         service="dovecot.service",
@@ -581,6 +582,14 @@ def deploy_chatmail(config_path: Path) -> None:
         restarted=dovecot_need_restart,
     )
 
+    systemd.service(
+        name="Start and enable Postfix",
+        service="postfix.service",
+        running=True,
+        enabled=True,
+        restarted=postfix_need_restart,
+    )
+
     systemd.service(
         name="Start and enable nginx",
         service="nginx.service",

cmdeploy/src/cmdeploy/service/chatmail-metadata.service.f

@@ -5,6 +5,43 @@ Description=Chatmail dict proxy for IMAP METADATA
 ExecStart={execpath} /run/dovecot/metadata.socket vmail /home/vmail/mail/{mail_domain}
 Restart=always
 RestartSec=30
+User=vmail
+
+# Make `systemd-analyze security` happy.
+CapabilityBoundingSet=
+LockPersonality=true
+MemoryDenyWriteExecute=true
+NoNewPrivileges=true
+PrivateDevices=true
+PrivateMounts=true
+PrivateTmp=true
+PrivateUsers=true
+ProtectClock=true
+ProtectControlGroups=true
+ProtectHostname=true
+ProtectKernelLogs=true
+ProtectKernelModules=true
+ProtectKernelTunables=true
+ProtectProc=noaccess
+ProtectSystem=strict
+RemoveIPC=true
+RestrictAddressFamilies=AF_UNIX
+RestrictNamespaces=true
+RestrictRealtime=true
+RestrictSUIDSGID=true
+SystemCallArchitectures=native
+SystemCallFilter=~@clock
+SystemCallFilter=~@cpu-emulation
+SystemCallFilter=~@debug
+SystemCallFilter=~@module
+SystemCallFilter=~@mount
+SystemCallFilter=~@obsolete
+SystemCallFilter=~@privileged
+SystemCallFilter=~@raw-io
+SystemCallFilter=~@reboot
+SystemCallFilter=~@resources
+SystemCallFilter=~@swap
+UMask=0077
 
 [Install]
 WantedBy=multi-user.target

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

@@ -5,6 +5,7 @@ Description=Chatmail dict authentication proxy for dovecot
 ExecStart={execpath} /run/dovecot/doveauth.socket vmail /home/vmail/passdb.sqlite {config_path}
 Restart=always
 RestartSec=30
+User=vmail
 
 [Install]
 WantedBy=multi-user.target

cmdeploy/src/cmdeploy/service/echobot.service.f

@@ -7,5 +7,44 @@ Environment="PATH={remote_venv_dir}:$PATH"
 Restart=always
 RestartSec=30
 
+# Apply security restrictions suggested by
+#   systemd-analyze security echobot.service
+CapabilityBoundingSet=
+LockPersonality=true
+MemoryDenyWriteExecute=true
+NoNewPrivileges=true
+PrivateDevices=true
+PrivateMounts=true
+PrivateTmp=true
+PrivateUsers=true
+ProtectClock=true
+ProtectControlGroups=true
+ProtectHostname=true
+ProtectKernelLogs=true
+ProtectKernelModules=true
+ProtectKernelTunables=true
+ProtectProc=noaccess
+
+# Should be "strict", but we currently write /accounts folder in a protected path
+ProtectSystem=full
+
+RemoveIPC=true
+RestrictAddressFamilies=AF_INET AF_INET6
+RestrictNamespaces=true
+RestrictRealtime=true
+RestrictSUIDSGID=true
+SystemCallArchitectures=native
+SystemCallFilter=~@clock
+SystemCallFilter=~@cpu-emulation
+SystemCallFilter=~@debug
+SystemCallFilter=~@module
+SystemCallFilter=~@mount
+SystemCallFilter=~@obsolete
+SystemCallFilter=~@raw-io
+SystemCallFilter=~@reboot
+SystemCallFilter=~@resources
+SystemCallFilter=~@swap
+UMask=0077
+
 [Install]
 WantedBy=multi-user.target