100 lines
3.3 KiB
PHP
100 lines
3.3 KiB
PHP
<?php
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function aws_signed_request($region, $params, $public_key, $private_key)
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{
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/*
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Copyright (c) 2009 Ulrich Mierendorff
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*/
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/*
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Parameters:
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$region - the Amazon(r) region (ca,com,co.uk,de,fr,jp)
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$params - an array of parameters, eg. array("Operation"=>"ItemLookup",
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"ItemId"=>"B000X9FLKM", "ResponseGroup"=>"Small")
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$public_key - your "Access Key ID"
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$private_key - your "Secret Access Key"
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*/
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// some paramters
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$method = "GET";
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$host = "ecs.amazonaws.".$region;
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$uri = "/onca/xml";
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// additional parameters
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$params["Service"] = "AWSECommerceService";
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$params["AWSAccessKeyId"] = $public_key;
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// GMT timestamp
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$params["Timestamp"] = gmdate("Y-m-d\TH:i:s\Z");
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// API version
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$params["Version"] = "2009-03-31";
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// sort the parameters
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ksort($params);
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// create the canonicalized query
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$canonicalized_query = array();
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foreach ($params as $param=>$value)
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{
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$param = str_replace("%7E", "~", rawurlencode($param));
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$value = str_replace("%7E", "~", rawurlencode($value));
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$canonicalized_query[] = $param."=".$value;
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}
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$canonicalized_query = implode("&", $canonicalized_query);
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// create the string to sign
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$string_to_sign = $method."\n".$host."\n".$uri."\n".$canonicalized_query;
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// calculate HMAC with SHA256 and base64-encoding
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$signature = base64_encode(hash_hmac("sha256", $string_to_sign, $private_key, True));
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// encode the signature for the request
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$signature = str_replace("%7E", "~", rawurlencode($signature));
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// create request
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$request = "http://".$host.$uri."?".$canonicalized_query."&Signature=".$signature;
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// do request
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if (extension_loaded('curl')) {
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$curl = curl_init($request);
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curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
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$response = curl_exec($curl);
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} else {
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$response = file_get_contents($request);
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}
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if ($response === False)
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{
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return False;
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}
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else
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{
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// parse XML
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$pxml = simplexml_load_string($response);
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if ($pxml === False)
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{
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return False; // no xml
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}
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else
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{
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return $pxml;
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}
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}
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}
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