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#!/usr/bin/env bash
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# Need to add your API key below or set as env variable
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apikey=${DYNU_API_KEY:-''}
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# This script adds a token to dynu.com DNS for the ACME challenge
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# usage dns_add_dynu "domain name" "token"
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# return codes are;
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# 0 - success
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# 1 - error in input
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# 2 - error within internal processing
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# 3 - error in result ( domain not found in dynu.com etc)
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fulldomain="${1}"
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token="${2}"
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API='https://api.dynu.com/v2/dns'
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# Check initial parameters
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if [[ -z "$fulldomain" ]]; then
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echo "DNS script requires full domain name as first parameter"
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exit 1
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fi
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if [[ -z "$token" ]]; then
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echo "DNS script requires challenge token as second parameter"
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exit 1
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fi
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curl_params=( -H "accept: application/json" -H "API-Key: $apikey" -H 'Content-Type: application/json' )
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# Get domain id
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# curl -X GET https://api.dynu.com/v2/dns/getroot/ubuntu-getssl.freeddns.org
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resp=$(curl --silent "${curl_params[@]}" -X GET "$API/getroot/${fulldomain}")
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# Match domain id
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re="\"id\":([^,]*),\"domainName\":\"${fulldomain}\""
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if [[ "$resp" =~ $re ]]; then
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domain_id="${BASH_REMATCH[1]}"
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fi
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if [[ -z "$domain_id" ]]; then
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echo 'Domain name not found on your Dynu account'
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exit 3
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fi
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# Check for existing _acme-challenge TXT record
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# curl -X GET "https://api.dynu.com/v2/dns/record/_acme-challenge.ubuntu-getssl.freeddns.org?recordType=TXT"
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resp=$(curl --silent "${curl_params[@]}" -X GET "${API}/record/_acme-challenge.${fulldomain}?recordType=TXT")
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re="\"id\":([^,]*)"
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if [[ "$resp" =~ $re ]]; then
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record_id="${BASH_REMATCH[1]}"
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fi
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if [[ -z "$record_id" ]]; then
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# Add new TXT challenge record
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resp=$(curl --silent \
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"${curl_params[@]}" \
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-X POST "${API}/${domain_id}/record" \
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--data "{\"nodeName\":\"_acme-challenge\",\"recordType\":\"TXT\",\"state\":\"true\",\"textData\":\"$token\"}")
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else
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# Update existing record
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# curl -X POST https://api.dynu.com/v2/dns/9329328/record/7082063 -d "{\"nodeName\":\"_acme-challenge\",\"recordType\":\"TXT\",\"state\":\"true\",\"textData\":\"Test2\"}"
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resp=$(curl --silent \
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"${curl_params[@]}" \
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-X POST "${API}/${domain_id}/record/${record_id}" \
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--data "{\"nodeName\":\"_acme-challenge\",\"recordType\":\"TXT\",\"state\":\"true\",\"textData\":\"$token\"}")
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fi
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# If adding record failed (exception:) then print error message
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if [[ "$resp" != *"\"statusCode\":200"* ]]; then
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echo "Error: DNS challenge not added: unknown error - ${resp}"
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exit 3
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fi
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