pfSense

<?php

include_once("r53.class");

function log_error($l){

	printf("LOG: %s\n", $l);

	return true;

}

main:

# Pass this your public and private keys

$r53 = new Route53("PUBKEY","PRIVKEY");

$apiurl = $r53->getApiUrl("ZONEID");

$xmlreq = $r53->getRequestBody("domain.example.com", "8.8.8.8", "3600");

log_error(sprintf("XMLHASH:%s",  hash("sha256",$xmlreq)));

$httphead = $r53->getHttpPostHeaders("ZONEID", "us-east-1", hash("sha256",$xmlreq));

if(true){

	log_error(sprintf("Sending reuquest to: %s", $apiurl));

	foreach($httphead as $hv){

		log_error(sprintf("Header: %s", $hv));

	}

	log_error(sprintf("XMLPOST: %s", $xmlreq));

}

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $apiurl);

curl_setopt($ch, CURLOPT_HTTPHEADER, $httphead);

curl_setopt($ch, CURLOPT_POSTFIELDS, $xmlreq);

print curl_exec($ch);

print "\n";

curl_close($ch);

?>