acme.sh/dnsapi/dns_wedos.sh

#!/usr/bin/env sh

# This script has been created at June 2020, based on knowledge base of wedos.com provider.
# It is intended to allow DNS-01 challenges for acme.sh using wedos's WAPI using XML.

# See WIKI page how to use it https://github.com/acmesh-official/acme.sh/wiki/dnsapi#117-use-wedos-dns-api

# Author Michal Tuma <mxtuma@gmail.com>
# For issues, please perform the action with --debug switch and report to https://github.com/acmesh-official/acme.sh/issues/3166

# MAIN WAPI ENDPOINT
WEDOS_WAPI_ENDPOINT="https://api.wedos.com/wapi/xml"
# WHEN SET TO ANYTHINK, THEN GENERATED XML WAPI REQUEST ADD TESTING SWITCH
TESTING_STAGE=

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

# Main implemented function for acme.sh.
# Function manages provided user informations, parse requested domain and subdomain name and create new TXT row with provided value.
# WEDOS WAPI Requests usage:
# - dns-domains-list : to retrieve a list of valid managed domains and check input $fulldomain
# - dns-row-add : to add new TXT row to a $fulldomain with $txtvalue set
# - dns-domain-commit : to commit added dns row
# Usage: add  _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
dns_wedos_add() {
  fulldomain=$1
  txtvalue=$2

  WEDOS_Username="${WEDOS_Username:-$(_readaccountconf_mutable WEDOS_Username)}"
  WEDOS_Wapipass="${WEDOS_Wapipass:-$(_readaccountconf_mutable WEDOS_Wapipass)}"
  WEDOS_Authtoken="${WEDOS_Authtoken:-$(_readaccountconf_mutable WEDOS_Authtoken)}"

  if [ "${WEDOS_Authtoken}" ]; then
    _debug "WEDOS Authtoken was already saved, using saved one"
    _saveaccountconf_mutable WEDOS_Authtoken "${WEDOS_Authtoken}"
  else
    if [ -z "${WEDOS_Username}" ] || [ -z "${WEDOS_Wapipass}" ]; then
      WEDOS_Username=""
      WEDOS_Wapipass=""
      _err "You didn't specify a WEDOS's username and wapi key yet."
      _err "Please type: export WEDOS_Username=<your user name to login to wedos web account>"
      _err "And: export WEDOS_Wapipass=<your WAPI passwords you setup using wedos web pages>"
      _err "After you export those variables, run the script again, the values will be saved for future"
      return 1
    fi

    #build WEDOS_Authtoken
    _debug "WEDOS Authtoken were not saved yet, building"
    WEDOS_Authtoken=$(printf '%s' "${WEDOS_Wapipass}" | _digest "sha1" "true" | head -c 40)
    _debug "WEDOS_Authtoken step 1, WAPI PASS sha1 sum: '${WEDOS_Authtoken}'"
    WEDOS_Authtoken="${WEDOS_Username}${WEDOS_Authtoken}"
    _debug "WEDOS_Authtoken step 2, username concat with token without hours: '${WEDOS_Authtoken}'"

    #save details

    _saveaccountconf_mutable WEDOS_Username "${WEDOS_Username}"
    _saveaccountconf_mutable WEDOS_Wapipass "${WEDOS_Wapipass}"
    _saveaccountconf_mutable WEDOS_Authtoken "${WEDOS_Authtoken}"
  fi

  if ! _get_root "${fulldomain}"; then
    _err "WEDOS Account do not contain primary domain to fullfill add of ${fulldomain}!"
    return 1
  fi

  _debug _sub_domain "${_sub_domain}"
  _debug _domain "${_domain}"

  if _wapi_row_add "${_domain}" "${_sub_domain}" "${txtvalue}" "300"; then
    _info "WEDOS WAPI: dns record added and dns changes were commited"
    return 0
  else
    _err "FAILED TO ADD DNS RECORD OR COMMIT DNS CHANGES"
    return 1
  fi
}

# Main implemented function for acme.sh
# This function verify provided domain if is managed by stored account, try to find TXT row for the domain and removes it if it is found.
# WEDOS WAPI Requests used:
# - dns-domains-list : to verify requested $fulldomain is managed and to parse what is subdomain from it
# - dns-rows-list : to verify if provided $txtvalue exists as TXT entry
# - dns-row-delete : to request deletion of TXT value
# - dns-domain-commit : to commit deletion
# Usage: rm _acme_challenge.www.domain.org  "e89fhwie73869yhe993e27d4hi"
dns_wedos_rm() {
  fulldomain=$1
  txtvalue=$2

  WEDOS_Username="${WEDOS_Username:-$(_readaccountconf_mutable WEDOS_Username)}"
  WEDOS_Wapipass="${WEDOS_Wapipass:-$(_readaccountconf_mutable WEDOS_Wapipass)}"
  WEDOS_Authtoken="${WEDOS_Authtoken:-$(_readaccountconf_mutable WEDOS_Authtoken)}"

  if [ "${WEDOS_Authtoken}" ]; then
    _debug "WEDOS Authtoken was already saved, using saved one"
    _saveaccountconf_mutable WEDOS_Authtoken "${WEDOS_Authtoken}"
  else
    if [ -z "${WEDOS_Username}" ] || [ -z "${WEDOS_Wapipass}" ]; then
      WEDOS_Username=""
      WEDOS_Wapipass=""
      _err "You didn't specify a WEDOS's username and wapi key yet."
      _err "Please type: export WEDOS_Username=<your user name to login to wedos web account>"
      _err "And: export WEDOS_Wapipass=<your WAPI passwords you setup using wedos web pages>"
      _err "After you export those variables, run the script again, the values will be saved for future"
      return 1
    fi

    #build WEDOS_Authtoken
    _debug "WEDOS Authtoken were not saved yet, building"
    WEDOS_Authtoken=$(printf '%s' "${WEDOS_Wapipass}" | sha1sum | head -c 40)
    _debug "WEDOS_Authtoken step 1, WAPI PASS sha1 sum: '${WEDOS_Authtoken}'"
    WEDOS_Authtoken="${WEDOS_Username}${WEDOS_Authtoken}"
    _debug "WEDOS_Authtoken step 2, username concat with token without hours: '${WEDOS_Authtoken}'"

    #save details

    _saveaccountconf_mutable WEDOS_Username "${WEDOS_Username}"
    _saveaccountconf_mutable WEDOS_Wapipass "${WEDOS_Wapipass}"
    _saveaccountconf_mutable WEDOS_Authtoken "${WEDOS_Authtoken}"
  fi

  if ! _get_root "${fulldomain}"; then
    _err "WEDOS Account do not contain primary domain to fullfill add of ${fulldomain}!"
    return 1
  fi

  _debug _sub_domain "${_sub_domain}"
  _debug _domain "${_domain}"

  if _wapi_find_row "${_domain}" "${_sub_domain}" "${txtvalue}"; then
    _info "WEDOS WAPI: dns record found with id '${_row_id}'"

    if _wapi_delete_row "${_domain}" "${_row_id}"; then
      _info "WEDOS WAPI: dns row were deleted and changes commited!"
      return 0
    fi
  fi

  _err "Requested dns row were not found or was imposible to delete it, do it manually"
  _err "Delete: ${fulldomain}"
  _err "Value: ${txtvalue}"
  return 1
}

####################  Private functions below ##################################

# Function _wapi_post(), only takes data, prepares auth token and provide result
# $1 - WAPI command string, like 'dns-domains-list'
# $2 - WAPI data for given command, is not required
# returns WAPI response if request were successfully delivered to WAPI endpoint
_wapi_post() {
  command=$1
  data=$2

  _debug "Command : ${command}"
  _debug "Data : ${data}"

  if [ -z "${command}" ]; then
    _err "No command were provided, implamantation error!"
    return 1
  fi

  # Prepare authentification token
  hour=$(TZ='Europe/Prague' date +%H)
  token=$(printf '%s' "${WEDOS_Authtoken}${hour}" | _digest "sha1" "true" | head -c 40)
  _debug "Authentification token is '${token}'"

  # Build xml request

  request="request=<?xml version=\"1.0\" encoding=\"UTF-8\"?>\
<request>\
  <user>${WEDOS_Username}</user>\
  <auth>${token}</auth>\
  <command>${command}</command>"

  if [ -z "${data}" ]; then
    echo "" 1>/dev/null
  else
    request="${request}${data}"
  fi

  if [ -z "$TESTING_STAGE" ]; then
    echo "" 1>/dev/null
  else
    request="${request}\
  <test>1</test>"
  fi

  request="${request}\
</request>"

  _debug "Request to WAPI is: ${request}"

  if ! response="$(_post "${request}" "$WEDOS_WAPI_ENDPOINT")"; then
    _err "Error contacting WEDOS WAPI with command ${command}"
    return 1
  fi

  _debug "Response : ${response}"
  _contains "${response}" "<code>1000</code>"

  return "$?"
}

# _get_root() function, for provided full domain, like _acme_challenge.www.example.com verify if WEDOS contains a primary active domain and found what is subdomain
# $1 - full domain to verify, ie _acme_challenge.www.example.com
# builds ${_domain} found at WEDOS, like example.com and ${_sub_domain} from provided full domain, like _acme_challenge.www
_get_root() {
  domain=$1

  if [ -z "${domain}" ]; then
    _err "Function _get_root was called without argument, implementation error!"
    return 1
  fi

  _debug "Get root for domain: ${domain}"

  _debug "Getting list of domains using WAPI ..."

  if ! _wapi_post "dns-domains-list"; then
    _err "Error on WAPI request for list of domains, response : ${response}"
    return 1
  else
    _debug "DNS list were successfully retrieved, response : ${response}"
  fi

  # In for each cycle, try parse the response to find primary active domains
  # For cycle description:
  # 1st	tr -d '\011\012\015' = remove all newlines and tab characters - whole XML became single line
  # 2nd sed "s/^.*<data>[ ]*//g" = remove all the xml data from the beggining of the XML - XML now start with the content of <data> element
  # 3rd sed "s/<\/data>.*$//g" = remove all the data after the data xml element - XML now contains only the content of data xml element
  # 4th sed "s/>[ ]*<\([^\/]\)/><\1/g" = remove all spaces between XML tag and XML start tag - XML now contains content of data xml element and is without spaces between end and start xml tags
  # 5th sed "s/<domain>//g" = remove all domain xml start tags - XML now contains only <name>...</name><type>...</type><status>...</status>  </domain>(next xml domain)
  # 6th sed "s/[ ]*<\/domain>/\n/g"= replace all "spaces</domain>" by new line - now we create multiple lines each should contain only <name>...</name><type>...</type><status>...</status>
  # 7th sed  -n "/<name>\([a-zA-Z0-9_\-\.]\+\)<\/name><type>primary<\/type><status>active<\/status>/p" = remove all non primary or non active domains lines
  # 8th sed "s/<name>\([a-zA-Z0-9_\-\.]\+\)<\/name><type>primary<\/type><status>active<\/status>/\1/g" = substitute for domain names only

  for xml_domain in $(echo "${response}" | tr -d '\011\012\015' | sed "s/^.*<data>[ ]*//g" | sed "s/<\/data>.*$//g" | sed "s/>[ ]*<\([^\/]\)/><\1/g" | sed "s/<domain>//g" | sed "s/[ ]*<\/domain>/\n/g" | sed -n "/<name>\([a-zA-Z0-9_\-\.]\+\)<\/name><type>primary<\/type><status>active<\/status>/p" | sed "s/<name>\([a-zA-Z0-9_\-\.]\+\)<\/name><type>primary<\/type><status>active<\/status>/\1/g"); do
    _debug "Found primary active domain: ${xml_domain}"
    if _endswith "${domain}" "${xml_domain}"; then
      length_difference=$(_math "${#domain} - ${#xml_domain}")
      possible_subdomain=$(echo "${domain}" | cut -c -"${length_difference}")
      if _endswith "${possible_subdomain}" "."; then
        length_difference=$(_math "${length_difference} - 1")
        _domain=${xml_domain}
        _sub_domain=$(echo "${possible_subdomain}" | cut -c -"${length_difference}")

        _info "Domain '${_domain}' was found at WEDOS account as primary, and subdomain is '${_sub_domain}'!"
        return 0
      fi
    fi
    _debug " ... found domain does not match required!"
  done

  return 1

}

# for provided domain, it commites all performed changes
_wapi_dns_commit() {
  domain=$1

  if [ -z "${domain}" ]; then
    _err "Invalid request to commit dns changes, domain is empty, implementation error!"
    return 1
  fi

  data="  <data>\
    <name>${domain}</name>\
  </data>"

  if ! _wapi_post "dns-domain-commit" "${data}"; then
    _err "Error on WAPI request to commit DNS changes, response : ${response}"
    _err "PLEASE USE WEB ACCESS TO CHECK IF CHANGES ARE REQUIRED TO COMMIT OR ROLLBACKED IMMEDIATELLY!"
    return 1
  else
    _debug "DNS CHANGES COMMITED, response : ${response}"
    _info "WEDOS DNS WAPI: Changes were commited to domain '${domain}'"
  fi

  return 0

}

# add one TXT dns row to a specified fomain
_wapi_row_add() {
  domain=$1
  sub_domain=$2
  value=$3
  ttl=$4

  if [ -z "${domain}" ] || [ -z "${sub_domain}" ] || [ -z "${value}" ] || [ -z "${ttl}" ]; then
    _err "Invalid request to add record, domain: '${domain}', sub_domain: '${sub_domain}', value: '${value}' and ttl: '${ttl}', on of required input were not provided, implementation error!"
    return 1
  fi

  # Prepare data for request to WAPI
  data="  <data>\
    <domain>${domain}</domain>\
    <name>${sub_domain}</name>\
    <ttl>${ttl}</ttl>\
    <type>TXT</type>\
    <rdata>${value}</rdata>\
    <auth_comment>Created using WAPI from acme.sh</auth_comment>\
  </data>"

  _debug "Adding row using WAPI ..."

  if ! _wapi_post "dns-row-add" "${data}"; then
    _err "Error on WAPI request to add new TXT row, response : ${response}"
    return 1
  else
    _debug "ROW ADDED, response : ${response}"
    _info "WEDOS DNS WAPI: Row to domain '${domain}' with name '${sub_domain}' were successfully added with value '${value}' and ttl set to ${ttl}"
  fi

  # Now we have to commit
  _wapi_dns_commit "${domain}"

  return "$?"

}

_wapi_find_row() {
  domain=$1
  sub_domain=$2
  value=$3

  if [ -z "${domain}" ] || [ -z "${sub_domain}" ] || [ -z "${value}" ]; then
    _err "Invalud request to finad a row, domain: '${domain}', sub_domain: '${sub_domain}' and value: '${value}', one of required input were not provided, implementation error!"
    return 1
  fi

  data="  <data>\
    <domain>${domain}</domain>\
  </data>"

  _debug "Searching rows using WAPI ..."

  if ! _wapi_post "dns-rows-list" "${data}"; then
    _err "Error on WAPI request to list domain rows, response : ${response}"
    return 1
  fi

  _debug "Domain rows found, response : ${response}"

  # Prepare sub domain regex which will be later used for search domain row
  # from _acme_challenge.sub it should be _acme_challenge\.sub

  sub_domain_regex=$(echo "${sub_domain}" | sed "s/\./\\\\./g")

  _debug "Subdomain regex '${sub_domain_regex}'"

  # In for each cycle loops over the domains rows, description:
  # 1st tr -d '\011\012\015' = delete all newlines and tab characters - XML became a single line
  # 2nd sed "s/^.*<data>[ ]*//g" = remove all from the beggining to the start of the content of the data xml element - XML is without unusefull beginning
  # 3rd sed "s/[ ]*<\/data>.*$//g" = remove the end of the xml starting with xml end tag data - XML contains only the content of data xml element and is trimmed
  # 4th sed "s/>[ ]*<\([^\/]\)/><\1/g" = remove all spaces between XML tag and XML start tag - XML now contains content of data xml element and is without spaces between end and start xml tags
  # 5th sed "s/<row>//g" = remove all row xml start tags - XML now contains rows xml element content and its end tag
  # 6th sed "s/[ ]*<\/row>/\n/g" = replace all "spaces</row>" by new line - now we create multiple lines each should contain only single row xml content
  # 7th sed  -n "/<name>${sub_domain_regex}<\/name>.*<rdtype>TXT<\/rdtype>/p" = remove all non TXT and non name matching row lines - now we have only xml lines with TXT rows matching requested values
  # 8th sed "s/^<ID>\([0-9]\+\)<\/ID>.*<rdata>\(.*\)<\/rdata>.*$/\1-\2/" = replace the whole lines to ID-value pairs
  # -- now there are only lines with ID-value but value might contain spaces (BAD FOR FOREACH LOOP) or special characters (BAD FOR REGEX MATCHING)
  # 9th grep "${value}" = match only a line containg searched value
  # 10th sed "s/^\([0-9]\+\).*$/\1/" = get only ID from the row

  for xml_row in $(echo "${response}" | tr -d '\011\012\015' | sed "s/^.*<data>[ ]*//g" | sed "s/[ ]*<\/data>.*$//g" | sed "s/>[ ]*<\([^\/]\)/><\1/g" | sed "s/<row>//g" | sed "s/[ ]*<\/row>/\n/g" | sed -n "/<name>${sub_domain_regex}<\/name>.*<rdtype>TXT<\/rdtype>/p" | sed "s/^<ID>\([0-9]\+\)<\/ID>.*<rdata>\(.*\)<\/rdata>.*$/\1-\2/" | grep "${value}" | sed "s/^\([0-9]\+\).*$/\1/"); do
    _row_id="${xml_row}"
    _info "WEDOS API: Found DNS row id ${_row_id} for domain ${domain}"
    return 0
  done

  _info "WEDOS API: No TXT row found for domain '${domain}' with name '${sub_domain}' and value '${value}'"

  return 1
}

_wapi_delete_row() {
  domain=$1
  row_id=$2

  if [ -z "${domain}" ] || [ -z "${row_id}" ]; then
    _err "Invalid request to delete domain dns row, domain: '${domain}' and row_id: '${row_id}', one of required input were not provided, implementation error!"
    return 1
  fi

  data="  <data>\
    <domain>${domain}</domain>
    <row_id>${row_id}</row_id>
</data>"

  _debug "Deleting dns row using WAPI ..."

  if ! _wapi_post "dns-row-delete" "${data}"; then
    _err "Error on WAPI request to delete dns row, response: ${response}"
    return 1
  fi

  _debug "DNS row were deleted, response: ${response}"

  _info "WEDOS API: Required dns domain row with row_id '${row_id}'  were correctly deleted at domain '${domain}'"

  # Now we have to commit changes
  _wapi_dns_commit "${domain}"

  return "$?"

}