Skymail DNS provider for acme.sh DNS API

dns_skymail.sh

#!/usr/bin/env sh

#
#SKYMAIL_Token="sdfsdfsdfljlbjkljlkjsdfoiwje"
#

#SKYMAIL_Email="xxxx"
#SKYMAIL_Password="xxxx"
#SKYMAIL_Secret="xxxx"

SKYMAIL_Api="https://api.skymail.net.br/v1"

########  Public functions #####################

#Usage: add  _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
dns_skymail_add() {
  fulldomain=$1
  txtvalue=$2

  SKYMAIL_Token="${SKYMAIL_Token:-$(_readaccountconf_mutable SKYMAIL_Token)}"
  SKYMAIL_Email="${SKYMAIL_Email:-$(_readaccountconf_mutable SKYMAIL_Email)}"
  SKYMAIL_Password="${SKYMAIL_Password:-$(_readaccountconf_mutable SKYMAIL_Password)}"
  SKYMAIL_Secret="${SKYMAIL_Secret:-$(_readaccountconf_mutable SKYMAIL_Secret)}"

  if [ -z "$SKYMAIL_Token" ]; then
    if [ -z "$SKYMAIL_Email" ] || [ -z "$SKYMAIL_Password" ] || [ -z "$SKYMAIL_Secret" ]; then
      SKYMAIL_Email=""
      SKYMAIL_Password=""
      SKYMAIL_Secret=""
      _err "You didn't specify a Skymail email, password and secret key yet."
      _err "You can get yours from here https://skymail.docs.apiary.io/introduction/acesso."
      return 1
    fi

    if ! _contains "$SKYMAIL_Email" "@"; then
      _err "It seems that the SKYMAIL_Email=$SKYMAIL_Email is not a valid email address."
      _err "Please check and retry."
      return 1
    fi

    _get_skymail_token

    _clearaccountconf_mutable SKYMAIL_Email
    _clearaccountconf_mutable SKYMAIL_Password
    _clearaccountconf_mutable SKYMAIL_Secret
  fi

  _saveaccountconf_mutable SKYMAIL_Token "$SKYMAIL_Token"

  _debug "First detect the root zone"

  if ! _get_root "$fulldomain"; then
    _err "invalid domain"
    return 1
  fi
  _debug _sub_domain "$_sub_domain"
  _debug _domain "$_domain"

  _debug "Getting txt records"
  _skymail_rest GET "dns/$_domain/entry?filters[type]=TXT&filters[name]=$fulldomain"


  if ! echo "$response" | tr -d " " | grep \"success\":true >/dev/null; then
    _err "Error"
    return 1
  fi

  # For wildcard cert, the main root domain and the wildcard domain have the same txt subdomain name, so
  # we can not use updating anymore.
  #  count=$(printf "%s\n" "$response" | _egrep_o "\"count\":[^,]*" | cut -d : -f 2)
  #  _debug count "$count"
  #  if [ "$count" = "0" ]; then
  _info "Adding record"
  if _skymail_rest POST "dns/$_domain/entry" "{\"type\":\"TXT\",\"name\":\"$fulldomain\",\"value\":\"$txtvalue\",\"ttl\":120}"; then
    if _contains "$response" "$txtvalue"; then
      _info "Added, OK"
      return 0
    elif _contains "$response" "The dns entry already exists"; then
      _info "Already exists, OK"
      return 0
    else
      _err "Add txt record error."
      return 1
    fi
  fi
  _err "Add txt record error."
  return 1

}

#fulldomain txtvalue
dns_skymail_rm() {
  fulldomain=$1
  txtvalue=$2

  SKYMAIL_Token="${SKYMAIL_Token:-$(_readaccountconf_mutable SKYMAIL_Token)}"
  SKYMAIL_Email="${SKYMAIL_Email:-$(_readaccountconf_mutable SKYMAIL_Email)}"
  SKYMAIL_Password="${SKYMAIL_Password:-$(_readaccountconf_mutable SKYMAIL_Password)}"
  SKYMAIL_Secret="${SKYMAIL_Secret:-$(_readaccountconf_mutable SKYMAIL_Secret)}"

  _debug "First detect the root zone"
  if ! _get_root "$fulldomain"; then
    _err "invalid domain"
    return 1
  fi
  _debug _sub_domain "$_sub_domain"
  _debug _domain "$_domain"

  _debug "Getting txt records"
  _skymail_rest GET "dns/$_domain/entry?filters[type]=TXT&filters[name]=$fulldomain&filters[value]=$txtvalue"

  if ! echo "$response" | tr -d " " | grep \"success\":true >/dev/null; then
    _err "Error: $response"
    return 1
  fi

  count=$(echo "$response" | _egrep_o "\"count\": *[0-9]*" | cut -d : -f 2 | tr -d " ")
  _debug count "$count"
  if [ "$count" = "0" ]; then
    _info "Don't need to remove."
  else
    record_id=$(echo "$response" | _egrep_o "\"id\": *[0-9]*" | cut -d : -f 2 | tr -d \" | _head_n 1 | tr -d " ")
    _debug "record_id" "$record_id"
    if [ -z "$record_id" ]; then
      _err "Can not get record id to remove."
      return 1
    fi
    if ! _skymail_rest DELETE "dns/$_domain/entry/$record_id"; then
      _err "Delete record error."
      return 1
    fi
    echo "$response" | tr -d " " | grep \"success\":true >/dev/null
  fi

}

####################  Private functions below ##################################
#_acme-challenge.www.domain.com
#returns
# _sub_domain=_acme-challenge.www
# _domain=domain.com
_get_root() {
  domain=$1
  i=1
  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 ! _skymail_rest GET "dns?filters[name]=$h"; then
      return 1
    fi

    if _contains "$response" "\"name\":\"$h\""; then
      _domain=$(echo "$response" | _egrep_o "\"name\": *\"[^\"]*\"" | cut -d : -f 2 | tr -d \" | _head_n 1 | tr -d " ")
      if [ "$_domain" ]; then
        _sub_domain=$(printf "%s" "$domain" | cut -d . -f 1-$p)
        _domain=$h
        return 0
      fi
      return 1
    fi
    p=$i
    i=$(_math "$i" + 1)
  done
  return 1
}

_skymail_rest() {
  m=$1
  ep="$2"
  data="$3"
  _debug "$ep"

  token_trimmed=$(echo "$SKYMAIL_Token" | tr -d '"')

  export _H1="Content-Type: application/json"
  export _H2="Authorization: Bearer $token_trimmed"

  if [ "$m" != "GET" ]; then
    _debug data "$data"
    response="$(_post "$data" "$SKYMAIL_Api/$ep" "" "$m")"
  else
    response="$(_get "$SKYMAIL_Api/$ep")"
  fi

  if [ "$?" != "0" ]; then
    _err "error $ep"
    return 1
  fi
  _debug2 response "$response"
  return 0
}

_get_skymail_token() {
  decoded_secret=$(echo -n $SKYMAIL_Secret | base64 -d)
  jti=$(_post "username=$SKYMAIL_Email&password=$SKYMAIL_Password" "$SKYMAIL_Api/auth/login" "" "POST" | _egrep_o '\{"jti":"[^"]*"\}')
  encoded_header=$(echo -n '{"alg":"HS256","typ":"JWT"}' | base64 | tr '+/' '-_' | tr -d '=')
  encoded_payload=$(echo -n "$jti" | base64 | tr '+/' '-_' | tr -d '=')
  signature=$(echo -n "$encoded_header.$encoded_payload" | openssl dgst -sha256 -hmac "$decoded_secret" -binary | base64 | tr '+/' '-_' | tr -d '=')

  SKYMAIL_Token="$encoded_header.$encoded_payload.$signature"
  _debug "Generated JWT token: $SKYMAIL_Token"

  return 0
}