From d416cf146e09b465cdcdf664a4f47b91a49343d3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Zeutzheim?= <bjoern@zeutzheim-boppard.de>
Date: Fri, 29 Mar 2019 02:06:49 +0100
Subject: [PATCH] Add multi-domain mode to dns_acmedns This change allows
 adding multiple, comma separated pairs of username, password and subdomain
 for acme-dns, because acme-dns only supports 2 active TXT records.

---
 dnsapi/dns_acmedns.sh | 49 +++++++++++++++++++++++++++++++++++++++----
 1 file changed, 45 insertions(+), 4 deletions(-)

diff --git a/dnsapi/dns_acmedns.sh b/dnsapi/dns_acmedns.sh
index 9b3efa48..f3444c97 100644
--- a/dnsapi/dns_acmedns.sh
+++ b/dnsapi/dns_acmedns.sh
@@ -9,11 +9,11 @@
 dns_acmedns_add() {
   fulldomain=$1
   txtvalue=$2
-  _info "Using acme-dns"
   _debug fulldomain "$fulldomain"
   _debug txtvalue "$txtvalue"
 
   ACMEDNS_UPDATE_URL="${ACMEDNS_UPDATE_URL:-$(_readaccountconf_mutable ACMEDNS_UPDATE_URL)}"
+  ACMEDNS_DOMAINS="${ACMEDNS_DOMAINS:-$(_readaccountconf_mutable ACMEDNS_DOMAINS)}"
   ACMEDNS_USERNAME="${ACMEDNS_USERNAME:-$(_readaccountconf_mutable ACMEDNS_USERNAME)}"
   ACMEDNS_PASSWORD="${ACMEDNS_PASSWORD:-$(_readaccountconf_mutable ACMEDNS_PASSWORD)}"
   ACMEDNS_SUBDOMAIN="${ACMEDNS_SUBDOMAIN:-$(_readaccountconf_mutable ACMEDNS_SUBDOMAIN)}"
@@ -23,13 +23,54 @@ dns_acmedns_add() {
   fi
 
   _saveaccountconf_mutable ACMEDNS_UPDATE_URL "$ACMEDNS_UPDATE_URL"
+  _saveaccountconf_mutable ACMEDNS_DOMAINS "$ACMEDNS_DOMAINS"
   _saveaccountconf_mutable ACMEDNS_USERNAME "$ACMEDNS_USERNAME"
   _saveaccountconf_mutable ACMEDNS_PASSWORD "$ACMEDNS_PASSWORD"
   _saveaccountconf_mutable ACMEDNS_SUBDOMAIN "$ACMEDNS_SUBDOMAIN"
 
-  export _H1="X-Api-User: $ACMEDNS_USERNAME"
-  export _H2="X-Api-Key: $ACMEDNS_PASSWORD"
-  data="{\"subdomain\":\"$ACMEDNS_SUBDOMAIN\", \"txt\": \"$txtvalue\"}"
+  if [ ! -z "$ACMEDNS_DOMAINS" ]; then
+    _info "Using acme-dns (multi domain mode)"
+    # ensure trailing comma is present
+    ACMEDNS_DOMAINS="$ACMEDNS_DOMAINS,"
+    while true; do
+      # get next domain name
+      DOMAIN=$(cut -d ',' -f 1 <<< $ACMEDNS_DOMAINS)
+
+      # check if we reached the last entry
+      if [ -z "$DOMAIN" ]; then
+        _err "no matching acme-dns domain found"
+        return 1
+      fi
+
+      # check if domain name matches our current domain
+      if [[ "$fulldomain" = *"$DOMAIN" ]]; then
+        # if so, extract the correct username, password and subdomain
+        USERNAME=$(cut -d ',' -f 1 <<< $ACMEDNS_USERNAME)
+        PASSWORD=$(cut -d ',' -f 1 <<< $ACMEDNS_PASSWORD)
+        SUBDOMAIN=$(cut -d ',' -f 1 <<< $ACMEDNS_SUBDOMAIN)
+        break
+      fi
+      # take next record
+      ACMEDNS_DOMAINS=$(cut -d ',' -f 2- <<< $ACMEDNS_DOMAINS)
+      ACMEDNS_USERNAME=$(cut -d ',' -f 2- <<< $ACMEDNS_USERNAME)
+      ACMEDNS_PASSWORD=$(cut -d ',' -f 2- <<< $ACMEDNS_PASSWORD)
+      ACMEDNS_SUBDOMAIN=$(cut -d ',' -f 2- <<< $ACMEDNS_SUBDOMAIN)
+    done
+  else
+    _info "Using acme-dns"
+    USERNAME=$ACMEDNS_USERNAME
+    PASSWORD=$ACMEDNS_PASSWORD
+    SUBDOMAIN=$ACMEDNS_SUBDOMAIN
+  fi
+  
+  if [ -z "$USERNAME" ] | [ -z "$PASSWORD" ] | [ -z "$SUBDOMAIN" ]; then
+    _err "no matching acme-dns domain found"
+    return 1
+  fi
+
+  export _H1="X-Api-User: $USERNAME"
+  export _H2="X-Api-Key: $PASSWORD"
+  data="{\"subdomain\":\"$SUBDOMAIN\", \"txt\": \"$txtvalue\"}"
 
   _debug data "$data"
   response="$(_post "$data" "$ACMEDNS_UPDATE_URL" "" "POST")"