dnsapi/dns_pdns.sh

   1 #!/usr/bin/env sh
   2
   3 #PowerDNS Emdedded API
   4 #https://doc.powerdns.com/md/httpapi/api_spec/
   5 #
   6 #PDNS_Url="http://ns.example.com:8081"
   7 #PDNS_ServerId="localhost"
   8 #PDNS_Token="0123456789ABCDEF"
   9 #PDNS_Ttl=60
  10
  11 DEFAULT_PDNS_TTL=60
  12
  13 ########  Public functions #####################
  14 #Usage: add _acme-challenge.www.domain.com "123456789ABCDEF0000000000000000000000000000000000000"
  15 dns_pdns_add() {
  16   fulldomain=$1
  17   txtvalue=$2
  18
  19   if [ -z "$PDNS_Url" ]; then
  20     _err "You don't specify PowerDNS address."
  21     _err "Please set PDNS_Url and try again."
  22     return 1
  23   fi
  24
  25   if [ -z "$PDNS_ServerId" ]; then
  26     _err "You don't specify PowerDNS server id."
  27     _err "Please set you PDNS_ServerId and try again."
  28     return 1
  29   fi
  30
  31   if [ -z "$PDNS_Token" ]; then
  32     _err "You don't specify PowerDNS token."
  33     _err "Please create you PDNS_Token and try again."
  34     return 1
  35   fi
  36
  37   if [ -z "$PDNS_Ttl" ]; then
  38     PDNS_Ttl=$DEFAULT_PDNS_TTL
  39   fi
  40
  41   #save the api addr and key to the account conf file.
  42   _saveaccountconf PDNS_Url "$PDNS_Url"
  43   _saveaccountconf PDNS_ServerId "$PDNS_ServerId"
  44   _saveaccountconf PDNS_Token "$PDNS_Token"
  45
  46   if [ "$PDNS_Ttl" != "$DEFAULT_PDNS_TTL" ]; then
  47     _saveaccountconf PDNS_Ttl "$PDNS_Ttl"
  48   fi
  49
  50   _debug "First detect the root zone"
  51   if ! _get_root $fulldomain; then
  52     _err "invalid domain"
  53     return 1
  54   fi
  55   _debug _domain "$_domain"
  56
  57   if ! set_record "$_domain" "$fulldomain" "$txtvalue"; then
  58     return 1
  59   fi
  60
  61   return 0
  62 }
  63
  64 #fulldomain
  65 dns_pdns_rm() {
  66   fulldomain=$1
  67
  68 }
  69
  70 set_record() {
  71   _info "Adding record"
  72   root=$1
  73   full=$2
  74   txtvalue=$3
  75
  76   if ! _pdns_rest "PATCH" "/api/v1/servers/$PDNS_ServerId/zones/$root." "{\"rrsets\": [{\"name\": \"$full.\", \"changetype\": \"REPLACE\", \"type\": \"TXT\", \"ttl\": $PDNS_Ttl, \"records\": [{\"name\": \"$full.\", \"type\": \"TXT\", \"content\": \"\\\"$txtvalue\\\"\", \"disabled\": false, \"ttl\": $PDNS_Ttl}]}]}"; then
  77     _err "Set txt record error."
  78     return 1
  79   fi
  80   if ! _pdns_rest "PUT" "/api/v1/servers/$PDNS_ServerId/zones/$root./notify"; then
  81     _err "Notify servers error."
  82     return 1
  83   fi
  84   return 0
  85 }
  86
  87 ####################  Private functions bellow ##################################
  88 #_acme-challenge.www.domain.com
  89 #returns
  90 # _domain=domain.com
  91 _get_root() {
  92   domain=$1
  93   i=1
  94   p=1
  95
  96   if _pdns_rest "GET" "/api/v1/servers/$PDNS_ServerId/zones"; then
  97     _zones_response=$response
  98   fi
  99
 100   while [ '1' ]; do
 101     h=$(printf $domain | cut -d . -f $i-100)
 102     if [ -z "$h" ]; then
 103       return 1
 104     fi
 105
 106     if printf "$_zones_response" | grep "\"name\": \"$h.\"" >/dev/null; then
 107       _domain=$h
 108       return 0
 109     fi
 110
 111     p=$i
 112     i=$(expr $i + 1)
 113   done
 114   _debug "$domain not found"
 115   return 1
 116 }
 117
 118 _pdns_rest() {
 119   method=$1
 120   ep=$2
 121   data=$3
 122
 123   _H1="X-API-Key: $PDNS_Token"
 124
 125   if [ ! "$method" = "GET" ]; then
 126     _debug data "$data"
 127     response="$(_post "$data" "$PDNS_Url$ep" "" "$method")"
 128   else
 129     response="$(_get "$PDNS_Url$ep")"
 130   fi
 131
 132   if [ "$?" != "0" ]; then
 133     _err "error $ep"
 134     return 1
 135   fi
 136   _debug2 response "$response"
 137
 138   return 0
 139 }