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#!/usr/bin/env sh
# shellcheck disable=SC2034
dns_duckdns_info='DuckDNS.org
Site: www.DuckDNS.org
Docs: github.com/acmesh-official/acme.sh/wiki/dnsapi#dns_duckdns
Options:
DuckDNS_Token API Token
Author: RaidenII
'
DuckDNS_API="https://www.duckdns.org/update"
######## Public functions ######################
#Usage: dns_duckdns_add _acme-challenge.domain.duckdns.org "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
dns_duckdns_add() {
fulldomain=$1
txtvalue=$2
DuckDNS_Token="${DuckDNS_Token:-$(_readaccountconf_mutable DuckDNS_Token)}"
if [ -z "$DuckDNS_Token" ]; then
_err "You must export variable: 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_mutable DuckDNS_Token "$DuckDNS_Token"
# Unfortunately, DuckDNS does not seems to support lookup domain through API
# So I assume your credentials (which are your domain and token) are correct
# If something goes wrong, we will get a KO response from DuckDNS
if ! _duckdns_get_domain; then
return 1
fi
# Now add the TXT record to DuckDNS
_info "Trying to add TXT record"
if _duckdns_rest GET "domains=$_duckdns_domain&token=$DuckDNS_Token&txt=$txtvalue"; then
if [ "$response" = "OK" ]; then
_info "TXT record has been successfully added to your DuckDNS domain."
_info "Note that all subdomains under this domain uses the same TXT record."
return 0
else
_err "Errors happened during adding the TXT record, response=$response"
return 1
fi
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=$2
DuckDNS_Token="${DuckDNS_Token:-$(_readaccountconf_mutable DuckDNS_Token)}"
if [ -z "$DuckDNS_Token" ]; then
_err "You must export variable: DuckDNS_Token"
_err "The token for your DuckDNS account is necessary."
_err "You can look it up in your DuckDNS account."
return 1
fi
if ! _duckdns_get_domain; then
return 1
fi
# Now remove the TXT record from DuckDNS
_info "Trying to remove TXT record"
if _duckdns_rest GET "domains=$_duckdns_domain&token=$DuckDNS_Token&txt=&clear=true"; then
if [ "$response" = "OK" ]; then
_info "TXT record has been successfully removed from your DuckDNS domain."
return 0
else
_err "Errors happened during removing the TXT record, response=$response"
return 1
fi
else
_err "Errors happened during removing the TXT record."
return 1
fi
}
#################### Private functions below ##################################
# fulldomain may be 'domain.duckdns.org' (if using --domain-alias) or '_acme-challenge.domain.duckdns.org'
# either way, return 'domain'. (duckdns does not allow further subdomains and restricts domains to [a-z0-9-].)
_duckdns_get_domain() {
# We'll extract the domain/username from full domain
_duckdns_domain="$(printf "%s" "$fulldomain" | _lower_case | _egrep_o '^(_acme-challenge\.)?([a-z0-9-]+\.)+duckdns\.org' | sed -n 's/^\([^.]\{1,\}\.\)*\([a-z0-9-]\{1,\}\)\.duckdns\.org$/\2/p;')"
if [ -z "$_duckdns_domain" ]; then
_err "Error extracting the domain."
return 1
fi
return 0
}
#Usage: method URI
_duckdns_rest() {
method=$1
param="$2"
_debug param "$param"
url="$DuckDNS_API?$param"
if [ -n "$DEBUG" ] && [ "$DEBUG" -gt 0 ]; then
url="$url&verbose=true"
fi
_debug url "$url"
# DuckDNS uses GET to update domain info
if [ "$method" = "GET" ]; then
response="$(_get "$url")"
_debug2 response "$response"
if [ -n "$DEBUG" ] && [ "$DEBUG" -gt 0 ] && _contains "$response" "UPDATED" && _contains "$response" "OK"; then
response="OK"
fi
else
_err "Unsupported method"
return 1
fi
return 0
}
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