From 07fa302d4380e9fa98720476becc8e1f83e1eb9a Mon Sep 17 00:00:00 2001
From: Joe Carstairs <me@joeac.net>
Date: Tue, 7 Jul 2026 09:10:34 +0100
Subject: tls.mk

---
 make/tls.mk | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 make/tls.mk

(limited to 'make/tls.mk')

diff --git a/make/tls.mk b/make/tls.mk
new file mode 100644
index 0000000..ff24604
--- /dev/null
+++ b/make/tls.mk
@@ -0,0 +1,81 @@
+installed_tls_crontabs = $(wildcard /etc/periodic/daily/tls-*.joeac.net)
+installed_tls_crontab_subdomains = $(installed_tls_crontabs:/etc/periodic/daily/tls-%.joeac.net=%)
+tls_crontab_subdomains_to_remove = $(filter-out $(SUBDOMAINS),$(installed_tls_crontab_subdomains))
+tls_crontabs_to_remove = $(tls_crontab_subdomains_to_remove:%=/etc/periodic/daily/tls-%.joeac.net)
+
+installed_tls_certs = $(wildcard /etc/letsencrypt/live/*.joeac.net)
+installed_tls_cert_subdomains = $(installed_tls_certs:/etc/letsencrypt/live/%.joeac.net=%)
+tls_cert_subdomains_to_delete = $(filter-out $(SUBDOMAINS),$(installed_tls_cert_subdomains))
+
+tls_crontab = /etc/periodic/daily/tls-$(SUBDOMAIN_$(module)).joeac.net
+tls_cert = /etc/letsencrypt/live/$(SUBDOMAIN_$(module)).joeac.net/fullchain.pem
+
+define install_tls_module_rule =
+.PHONY: install_tls_$(module)
+install_tls_module_$(module): $(if $(SUBDOMAIN_$(module)),$(tls_crontab) $(tls_cert))
+endef
+
+define reinstall_tls_module_rule =
+.PHONY: reinstall_tls_$(module)
+reinstall_tls_$(module): $(if $(SUBDOMAIN_$(module)),$(tls_crontab) renew_$(tls_cert))
+endef
+
+define uninstall_tls_module_rule =
+.PHONY: uninstall_tls_$(module)
+uninstall_tls_$(module): delete_cert_$(SUBDOMAIN_$(module)).joeac.net
+	$(if $(SUBDOMAIN_$(module)), \
+		sudo rm -f $(tls_crontab)
+	)
+endef
+
+define obtain_or_renew_cert_cmd =
+sudo certbot certonly
+	--nginx \
+	--cert-name $(SUBDOMAIN_$(module)) \
+	--domain $(subst @.,,$(SUBDOMAIN_$(module)).)joeac.net
+endef
+
+is_cert_expired = $(shell sudo certbot certificates --cert-name $(SUBDOMAIN_$(module)).joeac.net \
+	| grep "Expiry Date" | grep -E "(EXPIRED|REVOKED)")
+define cert_rule =
+$(tls_cert):
+	$(obtain_or_renew_cert_cmd)
+
+.PHONY: renew_$(tls_cert)
+renew_$(tls_cert):
+	$(if $(is_cert_expired),$(obtain_or_renew_cert_cmd))
+endef
+
+$(foreach module,$(ALL_MODULES), $(eval $(install_tls_module_rule)))
+$(foreach module,$(ALL_MODULES), $(eval $(reinstall_tls_module_rule)))
+$(foreach module,$(ALL_MODULES), $(eval $(uninstall_tls_module_rule)))
+$(foreach module,$(ALL_MODULES), $(eval $(cert_rule)))
+
+.PHONY: remove_/etc/periodic/daily/tls-%.joeac.net
+remove_/etc/periodic/daily/tls-%.joeac.net:
+	rm -f $(@:remove_%=%)
+
+.PHONY: delete_cert_%.joeac.net
+delete_cert_%.joeac.net:
+	sudo certbot delete --cert-name $(@:delete_cert_%=%)
+
+/etc/periodic/daily/tls-%joeac.net:
+	echo "#!/bin/sh" > crontab.tmp
+	echo "certbot renew --cert-name $(SUBDOMAIN_$(module)) --non-interactive" >> crontab.tmp
+	sudo mv crontab.tmp $@
+	sudo chmod +x $@
+
+.PHONY: reinstall_tls
+reinstall_tls: $(addprefix remove_,$(tls_crontabs_to_remove)) $(addprefix delete_cert_,$(tls_cert_subdomains_to_delete)) $(foreach subdomain,$(installed_tls_cert_subdomains),renew_$(tls_cert))
+
+.PHONY: uninstall_tls
+uninstall_tls: $(foreach module,$(ALL_MODULES),$(uninstall_tls_$(module)))
+
+.PHONY: install_certbot
+install_certbot: /usr/bin/certbot /usr/bin/python /usr/lib/$(shell ls /usr/bin | grep python[0-9]\\.)/certbot_nginx
+
+/usr/bin/certbot /usr/bin/python:
+	sudo apk add certbot
+
+/usr/lib/python%/certbot_nginx:
+	sudo apk add certbot-nginx
-- 
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