acme.sh/dnsapi/dns_duckdns.sh

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#!/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
}