From 4bf1f579f51d7343c1b643f7bb357ba9e48d0cd6 Mon Sep 17 00:00:00 2001
From: Jesai Langenbach <j.langenbach@kdz-ws.net>
Date: Thu, 12 Sep 2019 16:28:57 +0200
Subject: [PATCH] Add OPNsense Bind API Support

---
 dnsapi/dns_opnsense.sh | 262 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 262 insertions(+)
 create mode 100755 dnsapi/dns_opnsense.sh

diff --git a/dnsapi/dns_opnsense.sh b/dnsapi/dns_opnsense.sh
new file mode 100755
index 00000000..aa123541
--- /dev/null
+++ b/dnsapi/dns_opnsense.sh
@@ -0,0 +1,262 @@
+#!/usr/bin/env sh
+
+#OPNsense Bind API
+#https://docs.opnsense.org/development/api.html
+#
+#OPNs_Host="opnsense.example.com"
+#OPNs_Port="443"
+#OPNs_Key="qocfU9RSbt8vTIBcnW8bPqCrpfAHMDvj5OzadE7Str+rbjyCyk7u6yMrSCHtBXabgDDXx/dY0POUp7ZA"
+#OPNs_Token="pZEQ+3ce8dDlfBBdg3N8EpqpF5I1MhFqdxX06le6Gl8YzyQvYCfCzNaFX9O9+IOSyAs7X71fwdRiZ+Lv"
+#OPNs_Api_Insecure=1     # Set 1 for insecure and 0 for secure -> difference is whether ssl cert is checked for validity (0) or whether it is just accepted (1)
+
+########  Public functions #####################
+#Usage: add _acme-challenge.www.domain.com "123456789ABCDEF0000000000000000000000000000000000000"
+#fulldomain
+#txtvalue
+dns_opnsense_add() {
+  fulldomain=$1
+  txtvalue=$2
+
+  _opns_check_auth || return 1
+
+  if ! set_record "$fulldomain" "$txtvalue"; then
+    return 1
+  fi
+
+  return 0
+}
+
+#fulldomain
+dns_opnsense_rm() {
+  fulldomain=$1
+  txtvalue=$2
+
+  _opns_check_auth || return 1
+
+  if ! rm_record "$fulldomain" "$txtvalue"; then
+    return 1
+  fi
+
+  return 0
+}
+
+set_record() {
+  _info "Adding record"
+  fulldomain=$1
+  new_challenge=$2
+
+  _debug "Detect root zone"
+  if ! _get_root "$fulldomain"; then
+    _err "invalid domain"
+    return 1
+  fi
+  _debug _domain "$_domain"
+  _debug _host "$_host"
+  _debug _domainid "$_domainid"
+  _return_str=""
+  _record_string=""
+  _build_record_string "$_domainid" "$_host" "$new_challenge"
+  _uuid=""
+  if _existingchallenge "$_domain" "$_host" "$new_challenge"; then
+    # Update
+    if _opns_rest "POST" "/record/setRecord/${_uuid}" "$_record_string"; then
+      _return_str="$response"
+    else
+      return 1
+    fi
+
+  else
+    #create
+    if _opns_rest "POST" "/record/addRecord" "$_record_string"; then
+      _return_str="$response"
+    else
+      return 1
+    fi
+  fi
+
+  if echo "$_return_str" | _egrep_o  "\"result\":\"saved\"" >/dev/null
+  then
+    _opns_rest "POST" "/service/reconfigure" "{}"
+    _debug "Record created"
+  else
+    _err "Error createing record $_record_string"
+    return 1
+  fi
+
+  return 0
+}
+
+rm_record() {
+  _info "Remove record"
+  fulldomain=$1
+  new_challenge="$2"
+
+  _debug "Detect root zone"
+  if ! _get_root "$fulldomain"; then
+    _err "invalid domain"
+    return 1
+  fi
+
+  _debug _domain "$_domain"
+  _debug _host "$_host"
+  _debug _domainid "$_domainid"
+  _uuid=""
+  if _existingchallenge "$_domain" "$_host" "$new_challenge"; then
+    # Delete
+    if _opns_rest "POST" "/record/delRecord/${_uuid}"  "\{\}"; then
+      if echo "$_return_str" | _egrep_o "result":"deleted" >/dev/null; then
+        _opns_rest "POST" "/service/reconfigure" "{}"
+        _debug "Record deleted"
+      else
+        _err "Error delteting record $fulldomain"
+        return 1
+      fi
+    else
+        _err "Error delteting record $fulldomain"
+        return 1
+    fi
+  else
+    _info "Record not found, nothing to remove"
+  fi
+
+  return 0
+}
+
+####################  Private functions below ##################################
+#_acme-challenge.www.domain.com
+#returns
+# _domainid=domid
+ #_domain=domain.com
+_get_root() {
+  domain=$1
+  i=2
+  p=1
+  if _opns_rest "GET" "/domain/get"; then
+    _domain_response="$response"
+  else
+    return 1
+  fi
+
+  while true; do
+    h=$(printf "%s" "$domain" | cut -d . -f $i-100)
+    if [ -z "$h" ]; then
+      #not valid
+      return 1
+    fi
+    _debug h "$h"
+    id=$(echo $_domain_response| _egrep_o "\"[^\"]*\":{\"enabled\":\"1\",\"type\":{\"master\":{\"value\":\"master\",\"selected\":1},\"slave\":{\"value\":\"slave\",\"selected\":0}},\"masterip\":\"[^\"]*\",\"domainname\":\"${h}\"" | cut -d ':'  -f 1  | cut -d '"' -f 2 )
+
+    if [ -n "$id" ];then
+      _debug id "$id"
+      _host=$(printf "%s" "$domain" | cut -d . -f 1-$p)
+      _domain="${h}"
+      _domainid="${id}"
+      return 0
+    fi
+    p=$i
+    i=$(_math $i + 1)
+  done
+  _debug "$domain not found"
+
+  return 1
+}
+
+_opns_rest() {
+  method=$1
+  ep=$2
+  data=$3
+  #Percent encode user and token
+  key=$(echo $OPNs_Key | tr -d "\n\r" | _url_encode )
+  token=$(echo $OPNs_Token| tr -d "\n\r" | _url_encode )
+
+  opnsense_url="https://${key}:${token}@${OPNs_Host}:${OPNs_Port}/api/bind${ep}"
+  export _H1="Content-Type: application/json"
+  if [ ! "$method" = "GET" ]; then
+    _debug data "$data"
+    export _H1="Content-Type: application/json"
+    response="$(_post "$data" "$opnsense_url" "" "$method")"
+  else
+    export _H1=""
+    response="$(_get "$opnsense_url")"
+  fi
+
+  if [ "$?" != "0" ]; then
+    _err "error $ep"
+    return 1
+  fi
+  _debug2 response "$response"
+
+  return 0
+}
+
+_build_record_string() {
+  _record_string="{\"record\":{\"enabled\":\"1\",\"domain\":\"$1\",\"name\":\"$2\",\"type\":\"TXT\",\"value\":\"$3\"}}"
+}
+
+_existingchallenge() {
+  if _opns_rest "GET" "/record/searchRecord"; then
+    _record_response="$response"
+  else
+    return 1
+  fi
+  _uuid=""
+  _uuid=$( echo $_record_response| _egrep_o "\"uuid\":\"[^\"]*\",\"enabled\":\"[01]\",\"domain\":\"$1\",\"name\":\"$2\",\"type\":\"TXT\",\"value\":\"$3\"" | cut -d ':'  -f 2  | cut -d '"' -f 2 )
+
+  if [ -n "$_uuid" ];then
+    _debug uuid "$_uuid"
+    return 0
+  fi
+  _debug "${2}.$1{1} record not found"
+
+  return 1
+}
+
+_opns_check_auth() {
+  OPNs_Host="${OPNs_Host:-$(_readaccountconf_mutable OPNs_Host)}"
+  OPNs_Port="${OPNs_Port:-$(_readaccountconf_mutable OPNs_Port)}"
+  OPNs_Key="${OPNs_Key:-$(_readaccountconf_mutable OPNs_Key)}"
+  OPNs_Token="${OPNs_Token:-$(_readaccountconf_mutable OPNs_Token)}"
+  OPNs_Api_Insecure="${OPNs_Api_Insecure:-$(_readaccountconf_mutable OPNs_Api_Insecure)}"
+
+  if [ -z "$OPNs_Host" ]; then
+    OPNs_Host="localhost"
+    _err "You don't specify OPNsense address."
+  fi
+
+  if [ -z "$OPNs_Port" ]; then
+    OPNs_Port="443"
+    _err "You don't specify OPNsense Port."
+  fi
+
+  if [ -z "$OPNs_Api_Insecure" ]; then
+    OPNs_Api_Insecure="0"
+  fi
+
+  if [ -z "$OPNs_Key" ]; then
+    OPNs_Key=""
+    _err "You don't specify OPNsense api key id."
+    _err "Please set you OPNs_Key and try again."
+    return 1
+  fi
+
+  if [ -z "$OPNs_Token" ]; then
+    OPNs_Token=""
+    _err "You don't specify OPNsense token."
+    _err "Please create you OPNs_Token and try again."
+    return 1
+  fi
+
+  #save the api addr and key to the account conf file.
+  _saveaccountconf_mutable OPNs_Host "$OPNs_Host"
+  _saveaccountconf_mutable OPNs_Port "$OPNs_Port"
+  _saveaccountconf_mutable OPNs_Key "$OPNs_Key"
+  _saveaccountconf_mutable OPNs_Token "$OPNs_Token"
+  _saveaccountconf_mutable OPNs_Api_Insecure "$OPNs_Api_Insecure"
+  export HTTPS_INSECURE="${OPNs_Api_Insecure}"
+
+  if ! _opns_rest "GET" "/general/get";then
+    _err "Can't Access OPNsense"
+    return 1
+  fi
+  return 0
+}