tegwick
d4585eb542
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Assistant: claude-code Assistant-Model: opus Assistant-Process: 252470@bnt-lap001 Assistant-Session: ad628c8f-4be2-4979-94c9-76c7ed6f8241
83 lines
4.4 KiB
Bash
83 lines
4.4 KiB
Bash
#!/bin/sh
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# mx : Postfix -> pipe -> mas-gateway -> capture (JSONL evidence) -> ticket service
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# statute : static /.well-known/mas only (the only thing exposed over HTTPS)
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set -e
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DOMAIN="${MAS_DOMAIN:-mas.coulomb.social}"
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STATUTE_DIR="/app/examples/statute/$DOMAIN"
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if [ "$1" = "statute" ]; then
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exec python3 /app/examples/statute/serve.py "$STATUTE_DIR" --host 0.0.0.0 --port 8080
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fi
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cat > /usr/local/bin/mas-gateway <<SH
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#!/bin/sh
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exec env PYTHONPATH=/app python3 -m mas_gateway.main "\$@"
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SH
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chmod +x /usr/local/bin/mas-gateway
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# Not an open relay: no relay_domains, mynetworks is loopback only, so the
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# only accepted recipients are @$DOMAIN, all delivered to the mas pipe.
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# Stock reject_unauth_destination refuses any local-part containing '!' or '%'
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# (treated as sender-specified routing), which kills every P2 address, and an
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# access-map result is ignored for such routed addresses unless
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# allow_untrusted_routing=yes (safe here: relay_domains is empty). So relay control is an
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# explicit regexp whose match runs the `permit` restriction (not OK) for
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# anything ending in @$DOMAIN; everything else falls through to `reject`
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# (Postfix refuses to start smtpd without a reject-class entry in the list).
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# With swap_bangpath/percent_hack off and local_transport=mas, those
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# addresses can only reach the mas pipe.
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DOMAIN_RE=$(printf '%s' "$DOMAIN" | sed 's/\./\\./g')
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printf '/@%s$/ permit\n' "$DOMAIN_RE" > /etc/postfix/mas_rcpt.regexp
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postconf -e \
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"maillog_file=/dev/stdout" "myhostname=$DOMAIN" "mydomain=$DOMAIN" \
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"mydestination=$DOMAIN" "relay_domains=" "mynetworks=127.0.0.0/8" \
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"smtpd_relay_restrictions=permit_mynetworks,check_recipient_access regexp:/etc/postfix/mas_rcpt.regexp,reject" \
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"local_transport=mas" "local_recipient_maps=" "mas_destination_recipient_limit=1" \
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"recipient_delimiter=+" "swap_bangpath=no" "allow_percent_hack=no" \
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"allow_untrusted_routing=yes" \
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"disable_vrfy_command=yes" "smtpd_helo_required=yes" "smtpd_recipient_limit=20" \
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"message_size_limit=10240000" "smtpd_banner=\$myhostname ESMTP MAS live test" \
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"smtpd_tls_security_level=may" \
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"smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem" \
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"smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key" \
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"inet_protocols=ipv4" "compatibility_level=3.6"
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# start-fg does not populate the chroot (no resolv.conf), so DNS fails inside
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# it: client rDNS shows "unknown" and a relayhost would not resolve. The
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# container already isolates Postfix, so run the daemons unchrooted.
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postconf -F '*/*/chroot = n'
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# Outbound replies (reply test). Port 25 out is blocked on railiance01, so
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# replies go through an authenticated submission relay, and only when its
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# credentials are mounted. Only loopback (the ticket service) may relay.
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# Without a relay all non-local mail fails fast instead of queueing.
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SMTP_ARG=""
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if [ -n "$MAS_RELAY" ] && [ -s /etc/mas-relay/username ]; then
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printf '%s %s:%s\n' "$MAS_RELAY" "$(cat /etc/mas-relay/username)" \
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"$(cat /etc/mas-relay/password)" > /etc/postfix/sasl_passwd
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chmod 600 /etc/postfix/sasl_passwd && postmap /etc/postfix/sasl_passwd
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postconf -e "relayhost=$MAS_RELAY" "smtp_sasl_auth_enable=yes" \
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"smtp_sasl_password_maps=hash:/etc/postfix/sasl_passwd" \
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"smtp_sasl_security_options=noanonymous" "smtp_tls_security_level=secure" \
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"smtp_tls_CApath=/etc/ssl/certs"
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# Postfix's own bounces (null sender) never use the relay, so the ticket
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# service cap below really bounds everything sent through TEM.
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postconf -e "sender_dependent_default_transport_maps=inline:{<>=discard:}" \
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"empty_address_default_transport_maps_lookup_key=<>"
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SMTP_ARG="--smtp 127.0.0.1:25 --max-sent ${MAS_MAX_SENT:-300}"
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else
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postconf -e "default_transport=error:5.7.1 outbound mail disabled"
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fi
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cat >> /etc/postfix/master.cf <<CF
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mas unix - n n - - pipe
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flags=Rq user=mas argv=/usr/local/bin/mas-gateway
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--statute $STATUTE_DIR/.well-known/mas
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pipe --app-url http://127.0.0.1:8024/mas-events --recipient \${recipient}
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CF
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mkdir -p /var/lib/mas && chown mas /var/lib/mas
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# Replies are only recorded in the outbox unless a relay is configured above.
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su -s /bin/sh mas -c "python3 /app/examples/ticket_service/ticket_service.py \
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--db /var/lib/mas/tickets.sqlite3 --listen 127.0.0.1:8025 $SMTP_ARG" &
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su -s /bin/sh mas -c "python3 /app/capture.py http://127.0.0.1:8025/mas-events \
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/var/lib/mas/events.jsonl 127.0.0.1" &
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exec postfix start-fg
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