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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
# Due to the fact that DuckDNS uses StartSSL as cert provider, --insecure must be used with acme.sh
DuckDNS_API="https://www.duckdns.org/update"
API_Params="domains=$DuckDNS_Domain&token=$DuckDNS_Token"
######## Public functions #####################
#Usage: dns_duckdns_add _acme-challenge.domain.duckdns.org "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
dns_duckdns_add() {
fulldomain=$1
txtvalue=$2
# We'll extract the domain/username from full domain
DuckDNS_Domain=$(echo "$fulldomain" | _lower_case | _egrep_o '.[^.]*.duckdns.org' | cut -d . -f 2)
if [ -z "$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 "$DuckDNS_Token"
# Unfortunately, DuckDNS does not seems to support lookup domain through API
# So I assume your credentials (which are your domain and token) are correct
# If something goes wrong, we will get a KO response from DuckDNS
# Now add the TXT record to DuckDNS
_info "Trying to add TXT record"
if _duckdns_rest GET "$API_Params&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=$2
# Now remove the TXT record from DuckDNS
_info "Trying to remove TXT record"
if _duckdns_rest GET "$API_Params&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
_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
_debug2 response "$response"
return 0
}