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authorredmatrix <git@macgirvin.com>2016-05-10 17:26:44 -0700
committerredmatrix <git@macgirvin.com>2016-05-10 17:26:44 -0700
commit0b02a6d123b2014705998c94ddf3d460948d3eac (patch)
tree78ff2cab9944a4f5ab3f80ec93cbe1120de90bb2 /vendor/sabre/http/lib/Auth/AWS.php
parent40b5b6e9d2da7ab65c8b4d38cdceac83a4d78deb (diff)
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initial sabre upgrade (needs lots of work - to wit: authentication, redo the browser interface, and rework event export/import)
Diffstat (limited to 'vendor/sabre/http/lib/Auth/AWS.php')
-rw-r--r--vendor/sabre/http/lib/Auth/AWS.php234
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diff --git a/vendor/sabre/http/lib/Auth/AWS.php b/vendor/sabre/http/lib/Auth/AWS.php
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+++ b/vendor/sabre/http/lib/Auth/AWS.php
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+<?php
+
+namespace Sabre\HTTP\Auth;
+
+use Sabre\HTTP\Util;
+
+/**
+ * HTTP AWS Authentication handler
+ *
+ * Use this class to leverage amazon's AWS authentication header
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class AWS extends AbstractAuth {
+
+ /**
+ * The signature supplied by the HTTP client
+ *
+ * @var string
+ */
+ private $signature = null;
+
+ /**
+ * The accesskey supplied by the HTTP client
+ *
+ * @var string
+ */
+ private $accessKey = null;
+
+ /**
+ * An error code, if any
+ *
+ * This value will be filled with one of the ERR_* constants
+ *
+ * @var int
+ */
+ public $errorCode = 0;
+
+ const ERR_NOAWSHEADER = 1;
+ const ERR_MD5CHECKSUMWRONG = 2;
+ const ERR_INVALIDDATEFORMAT = 3;
+ const ERR_REQUESTTIMESKEWED = 4;
+ const ERR_INVALIDSIGNATURE = 5;
+
+ /**
+ * Gathers all information from the headers
+ *
+ * This method needs to be called prior to anything else.
+ *
+ * @return bool
+ */
+ function init() {
+
+ $authHeader = $this->request->getHeader('Authorization');
+ $authHeader = explode(' ', $authHeader);
+
+ if ($authHeader[0] != 'AWS' || !isset($authHeader[1])) {
+ $this->errorCode = self::ERR_NOAWSHEADER;
+ return false;
+ }
+
+ list($this->accessKey, $this->signature) = explode(':', $authHeader[1]);
+
+ return true;
+
+ }
+
+ /**
+ * Returns the username for the request
+ *
+ * @return string
+ */
+ function getAccessKey() {
+
+ return $this->accessKey;
+
+ }
+
+ /**
+ * Validates the signature based on the secretKey
+ *
+ * @param string $secretKey
+ * @return bool
+ */
+ function validate($secretKey) {
+
+ $contentMD5 = $this->request->getHeader('Content-MD5');
+
+ if ($contentMD5) {
+ // We need to validate the integrity of the request
+ $body = $this->request->getBody();
+ $this->request->setBody($body);
+
+ if ($contentMD5 != base64_encode(md5($body, true))) {
+ // content-md5 header did not match md5 signature of body
+ $this->errorCode = self::ERR_MD5CHECKSUMWRONG;
+ return false;
+ }
+
+ }
+
+ if (!$requestDate = $this->request->getHeader('x-amz-date'))
+ $requestDate = $this->request->getHeader('Date');
+
+ if (!$this->validateRFC2616Date($requestDate))
+ return false;
+
+ $amzHeaders = $this->getAmzHeaders();
+
+ $signature = base64_encode(
+ $this->hmacsha1($secretKey,
+ $this->request->getMethod() . "\n" .
+ $contentMD5 . "\n" .
+ $this->request->getHeader('Content-type') . "\n" .
+ $requestDate . "\n" .
+ $amzHeaders .
+ $this->request->getUrl()
+ )
+ );
+
+ if ($this->signature != $signature) {
+
+ $this->errorCode = self::ERR_INVALIDSIGNATURE;
+ return false;
+
+ }
+
+ return true;
+
+ }
+
+
+ /**
+ * Returns an HTTP 401 header, forcing login
+ *
+ * This should be called when username and password are incorrect, or not supplied at all
+ *
+ * @return void
+ */
+ function requireLogin() {
+
+ $this->response->addHeader('WWW-Authenticate', 'AWS');
+ $this->response->setStatus(401);
+
+ }
+
+ /**
+ * Makes sure the supplied value is a valid RFC2616 date.
+ *
+ * If we would just use strtotime to get a valid timestamp, we have no way of checking if a
+ * user just supplied the word 'now' for the date header.
+ *
+ * This function also makes sure the Date header is within 15 minutes of the operating
+ * system date, to prevent replay attacks.
+ *
+ * @param string $dateHeader
+ * @return bool
+ */
+ protected function validateRFC2616Date($dateHeader) {
+
+ $date = Util::parseHTTPDate($dateHeader);
+
+ // Unknown format
+ if (!$date) {
+ $this->errorCode = self::ERR_INVALIDDATEFORMAT;
+ return false;
+ }
+
+ $min = new \DateTime('-15 minutes');
+ $max = new \DateTime('+15 minutes');
+
+ // We allow 15 minutes around the current date/time
+ if ($date > $max || $date < $min) {
+ $this->errorCode = self::ERR_REQUESTTIMESKEWED;
+ return false;
+ }
+
+ return $date;
+
+ }
+
+ /**
+ * Returns a list of AMZ headers
+ *
+ * @return string
+ */
+ protected function getAmzHeaders() {
+
+ $amzHeaders = [];
+ $headers = $this->request->getHeaders();
+ foreach ($headers as $headerName => $headerValue) {
+ if (strpos(strtolower($headerName), 'x-amz-') === 0) {
+ $amzHeaders[strtolower($headerName)] = str_replace(["\r\n"], [' '], $headerValue[0]) . "\n";
+ }
+ }
+ ksort($amzHeaders);
+
+ $headerStr = '';
+ foreach ($amzHeaders as $h => $v) {
+ $headerStr .= $h . ':' . $v;
+ }
+
+ return $headerStr;
+
+ }
+
+ /**
+ * Generates an HMAC-SHA1 signature
+ *
+ * @param string $key
+ * @param string $message
+ * @return string
+ */
+ private function hmacsha1($key, $message) {
+
+ if (function_exists('hash_hmac')) {
+ return hash_hmac('sha1', $message, $key, true);
+ }
+
+ $blocksize = 64;
+ if (strlen($key) > $blocksize) {
+ $key = pack('H*', sha1($key));
+ }
+ $key = str_pad($key, $blocksize, chr(0x00));
+ $ipad = str_repeat(chr(0x36), $blocksize);
+ $opad = str_repeat(chr(0x5c), $blocksize);
+ $hmac = pack('H*', sha1(($key ^ $opad) . pack('H*', sha1(($key ^ $ipad) . $message))));
+ return $hmac;
+
+ }
+
+}