Drop in script for CertBot's --manual-auth-hook switch for DNS Hosted at NearlyFreeSpeech.com
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#!/bin/bash | |
API_KEY="##NFS-API-KEY##" | |
LOGIN="##NFS-USER##" | |
updatedns() { | |
OLDDATA=`dig @${NAMESERVER} -t txt +noall +answer ${DNSRECORD}.${CERTBOT_DOMAIN} | awk '{gsub("\"",""); print $5}'` | |
for FUNCTION in removeRR addRR ; do | |
echo "Running ${FUNCTION}" | |
TIMESTAMP=$(date +%s) | |
SALT=$(tr -dc 'a-zA-Z0-9' < /dev/urandom | head -c 16) | |
REQUEST_URI="/dns/${BASEDOMAIN}/$FUNCTION" | |
if [ ${FUNCTION} == "addRR" ] ; then | |
BODY="name=${DNSRECORD}&data=${CERTBOT_VALIDATION}&ttl=300&type=TXT" | |
else | |
BODY="name=${DNSRECORD}&data=${OLDDATA}&type=TXT" | |
fi | |
BODY_HASH=$(printf "%s" "${BODY}" | sha1sum | awk '{print $1}') | |
HASH_STRING=$(printf "%s" "${LOGIN};${TIMESTAMP};${SALT};${API_KEY};${REQUEST_URI};${BODY_HASH}") | |
HASH=$(printf "%s" "${HASH_STRING}" | sha1sum | awk '{print $1}') | |
curl -s -X POST -H "X-NFSN-Authentication: ${LOGIN};${TIMESTAMP};${SALT};${HASH}" \ | |
-d "${BODY}" "https://api.nearlyfreespeech.net${REQUEST_URI}" | |
done | |
} | |
if [ -z ${CERTBOT_DOMAIN} ] || [ -z ${CERTBOT_VALIDATION} ] ; then | |
echo "Missing Parameters from CertBot" | |
exit 1 | |
fi | |
BASEDOMAIN=`echo ${CERTBOT_DOMAIN} | awk -F. '{OFS="."; print $(NF-1),$(NF)}'` | |
SUBDOMAIN=`echo ${CERTBOT_DOMAIN} | sed -e 's/'${BASEDOMAIN}'//' -e 's/\.$//'` | |
if [ -z ${SUBDOMAIN} ] ; then | |
DNSRECORD="_acme-challenge" | |
else | |
DNSRECORD="_acme-challenge.${SUBDOMAIN}" | |
fi | |
NAMESERVER=`dig -t ns +noall +answer ${BASEDOMAIN} | awk 'NR==1{print $5}'` | |
updatedns | |
echo "Testing Validation Record" | |
TRY=0 | |
while [ $TRY -ne 12 ] ; do | |
CURRENT_DATA=`dig @${NAMESERVER} -t txt +noall +answer ${DNSRECORD}.${BASEDOMAIN} | awk '{gsub("\"",""); print $5}'` | |
if [ ! -z ${CURRENT_DATA} ] ; then | |
if [ ${CURRENT_DATA} == ${CERTBOT_VALIDATION} ] ; then | |
echo Succeeded: ${CERTBOT_DOMAIN} | |
exit 0 | |
fi | |
fi | |
let TRY=$TRY+1 | |
sleep 5 | |
done | |
echo Domain: ${CERTBOT_DOMAIN} | |
echo "Validation Timed Out" | |
exit 1 |
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