dnsapi: add deSEC.io api support

Signed-off-by: James Qian <sotux82@gmail.com>

dnsapi/dns_desec.sh

@@ -0,0 +1,204 @@
+#!/usr/bin/env sh
+#
+# deSEC.io Domain API
+#
+# Author: Zheng Qian
+#
+# deSEC API doc
+# https://desec.readthedocs.io/en/latest/
+
+REST_API="https://desec.io/api/v1/domains"
+
+########  Public functions #####################
+
+#Usage: dns_desec_add   _acme-challenge.foobar.dedyn.io   "d41d8cd98f00b204e9800998ecf8427e"
+dns_desec_add() {
+  fulldomain=$1
+  txtvalue=$2
+  _info "Using desec.io api"
+  _debug fulldomain "$fulldomain"
+  _debug txtvalue "$txtvalue"
+
+  DEDYN_TOKEN="${DEDYN_TOKEN:-$(_readaccountconf_mutable DEDYN_TOKEN)}"
+  DEDYN_NAME="${DEDYN_NAME:-$(_readaccountconf_mutable DEDYN_NAME)}"
+
+  if [ -z "$DEDYN_TOKEN" ] || [ -z "$DEDYN_NAME" ]; then
+    DEDYN_TOKEN=""
+    DEDYN_NAME=""
+    _err "You don't specify DEDYN_TOKEN and DEDYN_NAME yet."
+    _err "Please create you key and try again."
+    _err "e.g."
+    _err "export DEDYN_TOKEN=d41d8cd98f00b204e9800998ecf8427e"
+    _err "export DEDYN_NAME=foobar.dedyn.io"
+    return 1
+  fi
+  #save the api token and name to the account conf file.
+  _saveaccountconf_mutable DEDYN_TOKEN "$DEDYN_TOKEN"
+  _saveaccountconf_mutable DEDYN_NAME "$DEDYN_NAME"
+
+  _debug "First detect the root zone"
+  if ! _get_root "$fulldomain" "$REST_API/"; then
+    _err "invalid domain"
+    return 1
+  fi
+  _debug _sub_domain "$_sub_domain"
+  _debug _domain "$_domain"
+
+  # Get existing TXT record
+  _debug "Getting txt records"
+  txtvalues="\"\\\"$txtvalue\\\"\""
+  _desec_rest GET "$REST_API/$DEDYN_NAME/rrsets/$_sub_domain/TXT/"
+
+  if [ "$_code" = "200" ]; then
+    oldtxtvalues="$(echo "$response" | _egrep_o "\"records\":\\[\"\\S*\"\\]" | cut -d : -f 2 | tr -d "[]\\\\\"" | sed "s/,/ /g")"
+    _debug "existing TXT found"
+    _debug oldtxtvalues "$oldtxtvalues"
+    if [ -n "$oldtxtvalues" ]; then
+      for oldtxtvalue in $oldtxtvalues; do
+        txtvalues="$txtvalues, \"\\\"$oldtxtvalue\\\"\""
+      done
+    fi
+  fi
+  _debug txtvalues "$txtvalues"
+  _info "Adding record"
+  body="[{\"subname\":\"$_sub_domain\", \"type\":\"TXT\", \"records\":[$txtvalues], \"ttl\":60}]"
+
+  if _desec_rest PUT "$REST_API/$DEDYN_NAME/rrsets/" "$body"; then
+    if _contains "$response" "$txtvalue"; then
+      _info "Added, OK"
+      return 0
+    else
+      _err "Add txt record error."
+      return 1
+    fi
+  fi
+
+  _err "Add txt record error."
+  return 1
+}
+
+#Usage: fulldomain txtvalue
+#Remove the txt record after validation.
+dns_desec_rm() {
+  fulldomain=$1
+  txtvalue=$2
+  _info "Using desec.io api"
+  _debug fulldomain "$fulldomain"
+  _debug txtvalue "$txtvalue"
+
+  DEDYN_TOKEN="${DEDYN_TOKEN:-$(_readaccountconf_mutable DEDYN_TOKEN)}"
+  DEDYN_NAME="${DEDYN_NAME:-$(_readaccountconf_mutable DEDYN_NAME)}"
+
+  if [ -z "$DEDYN_TOKEN" ] || [ -z "$DEDYN_NAME" ]; then
+    DEDYN_TOKEN=""
+    DEDYN_NAME=""
+    _err "You don't specify DEDYN_TOKEN and DEDYN_NAME yet."
+    _err "Please create you key and try again."
+    _err "e.g."
+    _err "export DEDYN_TOKEN=d41d8cd98f00b204e9800998ecf8427e"
+    _err "export DEDYN_NAME=foobar.dedyn.io"
+    return 1
+  fi
+
+  _debug "First detect the root zone"
+  if ! _get_root "$fulldomain" "$REST_API/"; then
+    _err "invalid domain"
+    return 1
+  fi
+
+  _debug _sub_domain "$_sub_domain"
+  _debug _domain "$_domain"
+
+  # Get existing TXT record
+  _debug "Getting txt records"
+  txtvalues=""
+  _desec_rest GET "$REST_API/$DEDYN_NAME/rrsets/$_sub_domain/TXT/"
+
+  if [ "$_code" = "200" ]; then
+    oldtxtvalues="$(echo "$response" | _egrep_o "\"records\":\\[\"\\S*\"\\]" | cut -d : -f 2 | tr -d "[]\\\\\"" | sed "s/,/ /g")"
+    _debug "existing TXT found"
+    _debug oldtxtvalues "$oldtxtvalues"
+    if [ -n "$oldtxtvalues" ]; then
+      for oldtxtvalue in $oldtxtvalues; do
+        if [ "$txtvalue" != "$oldtxtvalue" ]; then
+          txtvalues="$txtvalues, \"\\\"$oldtxtvalue\\\"\""
+        fi
+      done
+    fi
+  fi
+  txtvalues="$(echo "$txtvalues" | cut -c3-)"
+  _debug txtvalues "$txtvalues"
+
+  _info "Deleting record"
+  body="[{\"subname\":\"$_sub_domain\", \"type\":\"TXT\", \"records\":[$txtvalues], \"ttl\":60}]"
+  _desec_rest PUT "$REST_API/$DEDYN_NAME/rrsets/" "$body"
+  if [ "$_code" = "200" ]; then
+    _info "Deleted, OK"
+    return 0
+  fi
+
+  _err "Delete txt record error."
+  return 1
+}
+
+####################  Private functions below ##################################
+
+_desec_rest() {
+  m="$1"
+  ep="$2"
+  data="$3"
+
+  export _H1="Authorization: Token $DEDYN_TOKEN"
+  export _H2="Accept: application/json"
+  export _H3="Content-Type: application/json"
+
+  if [ "$m" != "GET" ]; then
+    _secure_debug2 data "$data"
+    response="$(_post "$data" "$ep" "" "$m")"
+  else
+    response="$(_get "$ep")"
+  fi
+  _ret="$?"
+  _code="$(grep "^HTTP" "$HTTP_HEADER" | _tail_n 1 | cut -d " " -f 2 | tr -d "\\r\\n")"
+  _debug "http response code $_code"
+  _secure_debug2 response "$response"
+  if [ "$_ret" != "0" ]; then
+    _err "error $ep"
+    return 1
+  fi
+
+  response="$(printf "%s" "$response" | _normalizeJson)"
+  return 0
+}
+
+#_acme-challenge.www.domain.com
+#returns
+# _sub_domain=_acme-challenge.www
+# _domain=domain.com
+_get_root() {
+  domain="$1"
+  ep="$2"
+  i=2
+  p=1
+  while true; do
+    h=$(printf "%s" "$domain" | cut -d . -f $i-100)
+    _debug h "$h"
+    if [ -z "$h" ]; then
+      #not valid
+      return 1
+    fi
+
+    if ! _desec_rest GET "$ep"; then
+      return 1
+    fi
+
+    if _contains "$response" "\"name\":\"$h\"" >/dev/null; then
+      _sub_domain=$(printf "%s" "$domain" | cut -d . -f 1-$p)
+      _domain=$h
+      return 0
+    fi
+    p=$i
+    i=$(_math "$i" + 1)
+  done
+  return 1
+}