From fa98d72f3a87cf438ba16cccccf61fc268c517df Mon Sep 17 00:00:00 2001 From: RaidenII Date: Tue, 27 Jun 2017 09:21:39 -0400 Subject: [PATCH] Added preliminary support for DuckDNS TXT record API, a free Dynamic DNS provider --- dnsapi/dns_duckdns.sh | 93 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 93 insertions(+) create mode 100755 dnsapi/dns_duckdns.sh diff --git a/dnsapi/dns_duckdns.sh b/dnsapi/dns_duckdns.sh new file mode 100755 index 00000000..dc0d49ca --- /dev/null +++ b/dnsapi/dns_duckdns.sh @@ -0,0 +1,93 @@ +#!/usr/bin/env sh + +#Created by RaidenII, to use DuckDNS's API to add/remove text records +#06/27/2017 + +# Currently only support single domain access + +# DuckDNS uses StartSSL as their cert provider +# Seems not supported natively on Linux +# So I fall back to HTTP for API +DuckDNS_API="http://www.duckdns.org/update" + +######## Public functions ##################### + +#Usage: dns_duckdns_add _acme-challenge.domain.duckdns.org "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs" +dns_duckdns_add() { + fulldomain=$1 + txtvalue=$2 + + # We'll extract the domain/username from full domain + IFS='.' read -r -a fqdn <<< "$fulldomain" + DuckDNS_domain="${fqdn[-3]}" + + if [ -z "$DuckDNS_domain" ]; then + _err "Error extracting the domain." + return 1 + fi + + if [ -z "$DuckDNS_token" ]; then + DuckDNS_token="" + _err "The token for your DuckDNS account is necessary." + _err "You can look it up in your DuckDNS account." + return 1 + fi + + # Now save the credentials. + _saveaccountconf DuckDNS_domain "$DuckDNS_domain" + _saveaccountconf DuckDNS_token "$DuckDNS_token" + + # Unfortunately, DuckDNS does not seems to support lookup domain through API + # So I assume your credentials (which are your domain and token) are correct + # If something goes wrong, we will get a KO response from DuckDNS + + # Now add the TXT record to DuckDNS + _info "Trying to add TXT record" + if _duckdns_rest GET "domains=$DuckDNS_domain&token=$DuckDNS_token&txt=$txtvalue" && [ $response == "OK" ]; then + _info "TXT record has been successfully added to your DuckDNS domain." + _info "Note that all subdomains under this domain uses the same TXT record." + return 0 + else + _err "Errors happened during adding the TXT record." + return 1 + fi +} + +#Usage: fulldomain txtvalue +#Remove the txt record after validation. +dns_duckdns_rm() { + fulldomain=$1 + txtvalue=$2 + + # Now remove the TXT record from DuckDNS + _info "Trying to from TXT record" + if _duckdns_rest GET "domains=$DuckDNS_domain&token=$DuckDNS_token&txt=''&clear=true" && [ $response == "OK" ]; then + _info "TXT record has been successfully removed from your DuckDNS domain." + return 0 + else + _err "Errors happened during removing the TXT record." + return 1 + fi +} + +#################### Private functions below ################################## + +#Usage: method URI data +_duckdns_rest() { + method=$1 + param="$2" + _debug param "$param" + url="$DuckDNS_API?$param" + _debug url "$url" + + # DuckDNS uses GET to update domain info + if [ $method == "GET" ]; then + response="$(_get "$url")" + else + _err "Unsupported method" + return 1 + fi + + _debug response "$response" + return 0 +}