From 0fb206fe15107ca80a9199a0efec4e4a006ebb44 Mon Sep 17 00:00:00 2001
From: Philippe Kueck <bqobccy6ejnq2bqvmebqiwqha4cs4@protected32.unixadm.org>
Date: Wed, 26 Oct 2016 11:52:26 +0200
Subject: [PATCH] add nsupdate script for dns-01

---
 dnsapi/dns_nsupdate.sh | 94 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100755 dnsapi/dns_nsupdate.sh

diff --git a/dnsapi/dns_nsupdate.sh b/dnsapi/dns_nsupdate.sh
new file mode 100755
index 0000000..fd16c56
--- /dev/null
+++ b/dnsapi/dns_nsupdate.sh
@@ -0,0 +1,94 @@
+#!/usr/bin/env bash
+
+
+########  Public functions #####################
+
+#Usage: dns_nsupdate_add   _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
+dns_nsupdate_add() {
+  fulldomain=$1
+  txtvalue=$2
+  _checkKeyFile || return 1
+  NSUPDATE_SERVER=${NSUPDATE_SERVER:-localhost}
+  # save the dns server and key to the account conf file.
+  _saveaccountconf NSUPDATE_SERVER "${NSUPDATE_SERVER}"
+  _saveaccountconf NSUPDATE_KEY "${NSUPDATE_KEY}"
+  tmp=$(mktemp --tmpdir acme_nsupdate.XXXXXX)
+  cat > ${tmp} <<EOF
+server ${NSUPDATE_SERVER}
+update add ${fulldomain}. 60 in txt "${txtvalue}"
+send
+EOF
+  _info "adding ${fulldomain}. 60 in txt \"${txtvalue}\""
+  nsupdate -k ${NSUPDATE_KEY} ${tmp}
+  if [ $? -ne 0 ]; then
+    _err "error updating domain, see ${tmp} for details"
+    return 1
+  fi
+  rm -f ${tmp}
+  
+  return 0
+}
+
+#Usage: dns_nsupdate_rm   _acme-challenge.www.domain.com
+dns_nsupdate_rm() {
+  fulldomain=$1
+  _checkKeyFile || return 1
+  NSUPDATE_SERVER=${NSUPDATE_SERVER:-localhost}
+  tmp=$(mktemp --tmpdir acme_nsupdate.XXXXXX)
+  cat > ${tmp} <<EOF
+server ${NSUPDATE_SERVER}
+update delete ${fulldomain}. txt
+send
+EOF
+  _info "removing ${fulldomain}. txt"
+  nsupdate -k ${NSUPDATE_KEY} ${tmp}
+  if [ $? -ne 0 ]; then
+    _err "error updating domain, see ${tmp} for details"
+    return 1
+  fi
+  rm -f ${tmp}
+
+  return 0
+}
+
+
+####################  Private functions bellow ##################################
+
+_checkKeyFile() {
+  if [ -z "${NSUPDATE_KEY}" ]; then
+    _err "you must specify a path to the nsupdate key file"
+    return 1
+  fi
+  if [ ! -r "${NSUPDATE_KEY}" ]; then
+    _err "key ${NSUPDATE_KEY} is unreadable"
+    return 1
+  fi
+}
+
+_info() {
+  if [ -z "$2" ] ; then
+    echo "[$(date)] $1"
+  else
+    echo "[$(date)] $1='$2'"
+  fi
+}
+
+_err() {
+  _info "$@" >&2
+  return 1
+}
+
+_debug() {
+  if [ -z "$DEBUG" ] ; then
+    return
+  fi
+  _err "$@"
+  return 0
+}
+
+_debug2() {
+  if [ "$DEBUG" ] && [ "$DEBUG" -ge "2" ] ; then
+    _debug "$@"
+  fi
+  return
+}