detect old root cert and revoke/regen

Author: aptalca

README.md

@@ -331,6 +331,7 @@ Once registered you can define the dockerfile to use with `-f Dockerfile.aarch64
 
 ## Versions
 
+* **01.10.21:** - Check if the cert uses the old LE root cert, revoke and regenerate if necessary. [Here's more info](https://twitter.com/letsencrypt/status/1443621997288767491) on LE root cert expiration
 * **19.09.21:** - Add an optional header to opt out of Google FLoC in `ssl.conf`.
 * **17.09.21:** - Mark `SUBDOMAINS` var as optional.
 * **01.08.21:** - Add support for ionos dns validation.

readme-vars.yml

@@ -155,6 +155,7 @@ app_setup_nginx_reverse_proxy_block: ""
 
 # changelog
 changelogs:
+  - { date: "01.10.21:", desc: "Check if the cert uses the old LE root cert, revoke and regenerate if necessary. [Here's more info](https://twitter.com/letsencrypt/status/1443621997288767491) on LE root cert expiration" }
   - { date: "19.09.21:", desc: "Add an optional header to opt out of Google FLoC in `ssl.conf`." }
   - { date: "17.09.21:", desc: "Mark `SUBDOMAINS` var as optional." }
   - { date: "01.08.21:", desc: "Add support for ionos dns validation." }

root/etc/cont-init.d/50-config

@@ -312,6 +312,14 @@ else
     FILENAME="$DNSPLUGIN.ini"
 fi
 
+# Check if the cert is using the old LE root cert, revoke and regen if necessary
+if [ -f "/config/keys/letsencrypt/chain.pem" ] && ([ "${CERTPROVIDER}" == "letsencrypt" ] || [ "${CERTPROVIDER}" == "" ]) && ! openssl x509 -in /config/keys/letsencrypt/chain.pem -noout -issuer | grep -q "ISRG Root X"; then
+    echo "The cert seems to be using the old LE root cert, which is no longer valid. Deleting and revoking."
+    certbot revoke --non-interactive --cert-path /config/etc/letsencrypt/live/"$ORIGDOMAIN"/fullchain.pem --server $REV_ACMESERVER
+    rm -rf /config/etc/letsencrypt
+    mkdir -p /config/etc/letsencrypt
+fi
+
 # generating certs if necessary
 if [ ! -f "/config/keys/letsencrypt/fullchain.pem" ]; then
     if [ "$CERTPROVIDER" = "zerossl" ] && [ -n "$EMAIL" ]; then