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<?php
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/**
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* r53.class for managing Amazon AWS Route53 Resources
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*
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* This is a simplified version of r53.class for trivial "dynDNS" operations
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* that integrates well with pfSense. Based on the original r53.class by
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* Dan Myers at http://sourceforge.net/projects/php-r53/ .
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* Copyright (c) 2011, Dan Myers.
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* Parts copyright (c) 2008, Donovan Schonknecht.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* This is a modified BSD license (the third clause has been removed).
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* The BSD license may be found here:
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* http://www.opensource.org/licenses/bsd-license.php
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*
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* Amazon Route 53 is a trademark of Amazon.com, Inc. or its affiliates.
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*
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* Route53 is based on Donovan Schonknecht's Amazon S3 PHP class, found here:
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* http://undesigned.org.za/2007/10/22/amazon-s3-php-class
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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*/
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class Route53
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{
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protected $__accessKey; // AWS Access key
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protected $__secretKey; // AWS Secret key
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/**
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* Constructor
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*
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* @param string $accessKey Access key
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* @param string $secretKey Secret key
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* @return void
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*/
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public function __construct($accessKey = null, $secretKey = null) {
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if ($accessKey !== null && $secretKey !== null) {
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$this->setAuth($accessKey, $secretKey);
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}
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}
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/**
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* Set AWS access key and secret key
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*
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* @param string $accessKey Access key
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* @param string $secretKey Secret key
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* @return void
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*/
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public function setAuth($accessKey, $secretKey) {
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$this->__accessKey = $accessKey;
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$this->__secretKey = $secretKey;
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}
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/**
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* Return XML document for POST
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*
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* @param string $fqdn FQDN to set/update
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* @param string $ip IP to set for the FQDN
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* @param string $ttl TTL for the record
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* @return string XML document
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*/
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public function getRequestBody($fqdn, $ip, $ttl){
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$xmlreq = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>";
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$xmlreq .= "<ChangeResourceRecordSetsRequest xmlns=\"https://route53.amazonaws.com/doc/2013-04-01/\">";
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$xmlreq .= "<ChangeBatch><Changes><Change>";
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$xmlreq .= "<Action>UPSERT</Action>";
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$xmlreq .= "<ResourceRecordSet>";
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$xmlreq .= sprintf("<Name>%s</Name>", $fqdn);
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$xmlreq .= "<Type>A</Type>";
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$xmlreq .= sprintf("<TTL>%d</TTL>", $ttl);
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$xmlreq .= sprintf("<ResourceRecords><ResourceRecord><Value>%s</Value></ResourceRecord></ResourceRecords>", $ip);
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$xmlreq .= "</ResourceRecordSet>";
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$xmlreq .= "</Change></Changes></ChangeBatch>";
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$xmlreq .= "</ChangeResourceRecordSetsRequest>";
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return $xmlreq;
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}
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public function getRequestBodyV6($fqdn, $ip, $ttl){
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$xmlreq = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>";
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$xmlreq .= "<ChangeResourceRecordSetsRequest xmlns=\"https://route53.amazonaws.com/doc/2013-04-01/\">";
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$xmlreq .= "<ChangeBatch><Changes><Change>";
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$xmlreq .= "<Action>UPSERT</Action>";
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$xmlreq .= "<ResourceRecordSet>";
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$xmlreq .= sprintf("<Name>%s</Name>", $fqdn);
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$xmlreq .= "<Type>AAAA</Type>";
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$xmlreq .= sprintf("<TTL>%d</TTL>", $ttl);
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$xmlreq .= sprintf("<ResourceRecords><ResourceRecord><Value>%s</Value></ResourceRecord></ResourceRecords>", $ip);
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$xmlreq .= "</ResourceRecordSet>";
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$xmlreq .= "</Change></Changes></ChangeBatch>";
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$xmlreq .= "</ChangeResourceRecordSetsRequest>";
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return $xmlreq;
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}
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/**
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* Return API URL
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*
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* @param string $zoneid Amazon Zone ID
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* @return string URL
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*/
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public function getApiUrl($zoneid){
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return sprintf("https://route53.amazonaws.com/2013-04-01/hostedzone/%s/rrset", $zoneid);
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}
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/**
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* Return HTTP post headers
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*
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* @param string zoneId Amazon Zone
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* @param string regionId Amazon Region Code (e.g. us-east-1)
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* @param string requestBodySHA256 SHA256 hash of the request body
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* @return Array headers
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*/
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public function getHttpPostHeaders($zoneId, $regionId, $requestBodySHA256){
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$canonical_uri = sprintf("/2013-04-01/hostedzone/%s/rrset", $zoneId);
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$amz_date = sprintf("%sT%sZ", gmdate('Ymd'), gmdate('His'));
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$date_stamp = gmdate('Ymd');
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$canonical_headers = sprintf("content-type:%s\nhost:%s\nx-amz-date:%s\n",
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"text/xml", "route53.amazonaws.com", $amz_date);
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$signed_headers = "content-type;host;x-amz-date";
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$canonical_request = sprintf("%s\n%s\n\n%s\n%s\n%s",
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"POST", $canonical_uri, $canonical_headers, $signed_headers, $requestBodySHA256);
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$algorithm = "AWS4-HMAC-SHA256";
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$credential_scope = sprintf("%s/%s/%s/%s", $date_stamp, $regionId, "route53", "aws4_request");
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$string_to_sign = sprintf("%s\n%s\n%s\n%s",
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$algorithm, $amz_date, $credential_scope, hash("sha256", $canonical_request));
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$kSecret = sprintf("AWS4%s", $this->__secretKey);
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$kDate = hash_hmac("sha256", $date_stamp, $kSecret, true);
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$kRegion = hash_hmac("sha256", $regionId, $kDate, true);
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$kService = hash_hmac("sha256", "route53", $kRegion, true);
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$signing_key = hash_hmac("sha256","aws4_request", $kService, true);
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$signature = bin2hex(hash_hmac("sha256", $string_to_sign, $signing_key, true));
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$authorization_header = sprintf("%s Credential=%s/%s, SignedHeaders=%s, Signature=%s",
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$algorithm, $this->__accessKey, $credential_scope, $signed_headers, $signature);
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$httphead[] = "Content-Type: text/xml";
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$httphead[] = sprintf("X-Amz-Date: %s", $amz_date);
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$httphead[] = sprintf("Authorization: %s", $authorization_header);
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return $httphead;
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}
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}
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