initial sabre upgrade (needs lots of work - to wit: authentication, redo the browser interface, and rework event export/import)

5 files changed, 657 insertions, 0 deletions

diff --git a/vendor/sabre/http/lib/Auth/AWS.php b/vendor/sabre/http/lib/Auth/AWS.php
new file mode 100644
index 000000000..5e176646a
--- /dev/null
+++ b/vendor/sabre/http/lib/Auth/AWS.php
@@ -0,0 +1,234 @@
+<?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;
+
+    }
+
+}
diff --git a/vendor/sabre/http/lib/Auth/AbstractAuth.php b/vendor/sabre/http/lib/Auth/AbstractAuth.php
new file mode 100644
index 000000000..ae45b3ee2
--- /dev/null
+++ b/vendor/sabre/http/lib/Auth/AbstractAuth.php
@@ -0,0 +1,73 @@
+<?php
+
+namespace Sabre\HTTP\Auth;
+
+use Sabre\HTTP\RequestInterface;
+use Sabre\HTTP\ResponseInterface;
+
+/**
+ * HTTP Authentication base class.
+ *
+ * This class provides some common functionality for the various base classes.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+abstract class AbstractAuth {
+
+    /**
+     * Authentication realm
+     *
+     * @var string
+     */
+    protected $realm;
+
+    /**
+     * Request object
+     *
+     * @var RequestInterface
+     */
+    protected $request;
+
+    /**
+     * Response object
+     *
+     * @var ResponseInterface
+     */
+    protected $response;
+
+    /**
+     * Creates the object
+     *
+     * @param string $realm
+     * @return void
+     */
+    function __construct($realm = 'SabreTooth', RequestInterface $request, ResponseInterface $response) {
+
+        $this->realm = $realm;
+        $this->request = $request;
+        $this->response = $response;
+
+    }
+
+    /**
+     * This method sends the needed HTTP header and statuscode (401) to force
+     * the user to login.
+     *
+     * @return void
+     */
+    abstract function requireLogin();
+
+    /**
+     * Returns the HTTP realm
+     *
+     * @return string
+     */
+    function getRealm() {
+
+        return $this->realm;
+
+    }
+
+}
diff --git a/vendor/sabre/http/lib/Auth/Basic.php b/vendor/sabre/http/lib/Auth/Basic.php
new file mode 100644
index 000000000..60633b957
--- /dev/null
+++ b/vendor/sabre/http/lib/Auth/Basic.php
@@ -0,0 +1,63 @@
+<?php
+
+namespace Sabre\HTTP\Auth;
+
+/**
+ * HTTP Basic authentication utility.
+ *
+ * This class helps you setup basic auth. The process is fairly simple:
+ *
+ * 1. Instantiate the class.
+ * 2. Call getCredentials (this will return null or a user/pass pair)
+ * 3. If you didn't get valid credentials, call 'requireLogin'
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Basic extends AbstractAuth {
+
+    /**
+     * This method returns a numeric array with a username and password as the
+     * only elements.
+     *
+     * If no credentials were found, this method returns null.
+     *
+     * @return null|array
+     */
+    function getCredentials() {
+
+        $auth = $this->request->getHeader('Authorization');
+
+        if (!$auth) {
+            return null;
+        }
+
+        if (strtolower(substr($auth, 0, 6)) !== 'basic ') {
+            return null;
+        }
+
+        $credentials = explode(':', base64_decode(substr($auth, 6)), 2);
+
+        if (2 !== count($credentials)) {
+            return null;
+        }
+
+        return $credentials;
+
+    }
+
+    /**
+     * This method sends the needed HTTP header and statuscode (401) to force
+     * the user to login.
+     *
+     * @return void
+     */
+    function requireLogin() {
+
+        $this->response->addHeader('WWW-Authenticate', 'Basic realm="' . $this->realm . '"');
+        $this->response->setStatus(401);
+
+    }
+
+}
diff --git a/vendor/sabre/http/lib/Auth/Bearer.php b/vendor/sabre/http/lib/Auth/Bearer.php
new file mode 100644
index 000000000..eefdf11ee
--- /dev/null
+++ b/vendor/sabre/http/lib/Auth/Bearer.php
@@ -0,0 +1,56 @@
+<?php
+
+namespace Sabre\HTTP\Auth;
+
+/**
+ * HTTP Bearer authentication utility.
+ *
+ * This class helps you setup bearer auth. The process is fairly simple:
+ *
+ * 1. Instantiate the class.
+ * 2. Call getToken (this will return null or a token as string)
+ * 3. If you didn't get a valid token, call 'requireLogin'
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author François Kooman (fkooman@tuxed.net)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Bearer extends AbstractAuth {
+
+    /**
+     * This method returns a string with an access token.
+     *
+     * If no token was found, this method returns null.
+     *
+     * @return null|string
+     */
+    function getToken() {
+
+        $auth = $this->request->getHeader('Authorization');
+
+        if (!$auth) {
+            return null;
+        }
+
+        if (strtolower(substr($auth, 0, 7)) !== 'bearer ') {
+            return null;
+        }
+
+        return substr($auth, 7);
+
+    }
+
+    /**
+     * This method sends the needed HTTP header and statuscode (401) to force
+     * authentication.
+     *
+     * @return void
+     */
+    function requireLogin() {
+
+        $this->response->addHeader('WWW-Authenticate', 'Bearer realm="' . $this->realm . '"');
+        $this->response->setStatus(401);
+
+    }
+
+}
diff --git a/vendor/sabre/http/lib/Auth/Digest.php b/vendor/sabre/http/lib/Auth/Digest.php
new file mode 100644
index 000000000..4b3f0746f
--- /dev/null
+++ b/vendor/sabre/http/lib/Auth/Digest.php
@@ -0,0 +1,231 @@
+<?php
+
+namespace Sabre\HTTP\Auth;
+
+use Sabre\HTTP\RequestInterface;
+use Sabre\HTTP\ResponseInterface;
+
+/**
+ * HTTP Digest Authentication handler
+ *
+ * Use this class for easy http digest authentication.
+ * Instructions:
+ *
+ *  1. Create the object
+ *  2. Call the setRealm() method with the realm you plan to use
+ *  3. Call the init method function.
+ *  4. Call the getUserName() function. This function may return null if no
+ *     authentication information was supplied. Based on the username you
+ *     should check your internal database for either the associated password,
+ *     or the so-called A1 hash of the digest.
+ *  5. Call either validatePassword() or validateA1(). This will return true
+ *     or false.
+ *  6. To make sure an authentication prompt is displayed, call the
+ *     requireLogin() method.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Digest extends AbstractAuth {
+
+    /**
+     * These constants are used in setQOP();
+     */
+    const QOP_AUTH = 1;
+    const QOP_AUTHINT = 2;
+
+    protected $nonce;
+    protected $opaque;
+    protected $digestParts;
+    protected $A1;
+    protected $qop = self::QOP_AUTH;
+
+    /**
+     * Initializes the object
+     */
+    function __construct($realm = 'SabreTooth', RequestInterface $request, ResponseInterface $response) {
+
+        $this->nonce = uniqid();
+        $this->opaque = md5($realm);
+        parent::__construct($realm, $request, $response);
+
+    }
+
+    /**
+     * Gathers all information from the headers
+     *
+     * This method needs to be called prior to anything else.
+     *
+     * @return void
+     */
+    function init() {
+
+        $digest = $this->getDigest();
+        $this->digestParts = $this->parseDigest($digest);
+
+    }
+
+    /**
+     * Sets the quality of protection value.
+     *
+     * Possible values are:
+     *   Sabre\HTTP\DigestAuth::QOP_AUTH
+     *   Sabre\HTTP\DigestAuth::QOP_AUTHINT
+     *
+     * Multiple values can be specified using logical OR.
+     *
+     * QOP_AUTHINT ensures integrity of the request body, but this is not
+     * supported by most HTTP clients. QOP_AUTHINT also requires the entire
+     * request body to be md5'ed, which can put strains on CPU and memory.
+     *
+     * @param int $qop
+     * @return void
+     */
+    function setQOP($qop) {
+
+        $this->qop = $qop;
+
+    }
+
+    /**
+     * Validates the user.
+     *
+     * The A1 parameter should be md5($username . ':' . $realm . ':' . $password);
+     *
+     * @param string $A1
+     * @return bool
+     */
+    function validateA1($A1) {
+
+        $this->A1 = $A1;
+        return $this->validate();
+
+    }
+
+    /**
+     * Validates authentication through a password. The actual password must be provided here.
+     * It is strongly recommended not store the password in plain-text and use validateA1 instead.
+     *
+     * @param string $password
+     * @return bool
+     */
+    function validatePassword($password) {
+
+        $this->A1 = md5($this->digestParts['username'] . ':' . $this->realm . ':' . $password);
+        return $this->validate();
+
+    }
+
+    /**
+     * Returns the username for the request
+     *
+     * @return string
+     */
+    function getUsername() {
+
+        return $this->digestParts['username'];
+
+    }
+
+    /**
+     * Validates the digest challenge
+     *
+     * @return bool
+     */
+    protected function validate() {
+
+        $A2 = $this->request->getMethod() . ':' . $this->digestParts['uri'];
+
+        if ($this->digestParts['qop'] == 'auth-int') {
+            // Making sure we support this qop value
+            if (!($this->qop & self::QOP_AUTHINT)) return false;
+            // We need to add an md5 of the entire request body to the A2 part of the hash
+            $body = $this->request->getBody($asString = true);
+            $this->request->setBody($body);
+            $A2 .= ':' . md5($body);
+        } else {
+
+            // We need to make sure we support this qop value
+            if (!($this->qop & self::QOP_AUTH)) return false;
+        }
+
+        $A2 = md5($A2);
+
+        $validResponse = md5("{$this->A1}:{$this->digestParts['nonce']}:{$this->digestParts['nc']}:{$this->digestParts['cnonce']}:{$this->digestParts['qop']}:{$A2}");
+
+        return $this->digestParts['response'] == $validResponse;
+
+
+    }
+
+    /**
+     * 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() {
+
+        $qop = '';
+        switch ($this->qop) {
+            case self::QOP_AUTH    :
+                $qop = 'auth';
+                break;
+            case self::QOP_AUTHINT :
+                $qop = 'auth-int';
+                break;
+            case self::QOP_AUTH | self::QOP_AUTHINT :
+                $qop = 'auth,auth-int';
+                break;
+        }
+
+        $this->response->addHeader('WWW-Authenticate', 'Digest realm="' . $this->realm . '",qop="' . $qop . '",nonce="' . $this->nonce . '",opaque="' . $this->opaque . '"');
+        $this->response->setStatus(401);
+
+    }
+
+
+    /**
+     * This method returns the full digest string.
+     *
+     * It should be compatibile with mod_php format and other webservers.
+     *
+     * If the header could not be found, null will be returned
+     *
+     * @return mixed
+     */
+    function getDigest() {
+
+        return $this->request->getHeader('Authorization');
+
+    }
+
+
+    /**
+     * Parses the different pieces of the digest string into an array.
+     *
+     * This method returns false if an incomplete digest was supplied
+     *
+     * @param string $digest
+     * @return mixed
+     */
+    protected function parseDigest($digest) {
+
+        // protect against missing data
+        $needed_parts = ['nonce' => 1, 'nc' => 1, 'cnonce' => 1, 'qop' => 1, 'username' => 1, 'uri' => 1, 'response' => 1];
+        $data = [];
+
+        preg_match_all('@(\w+)=(?:(?:")([^"]+)"|([^\s,$]+))@', $digest, $matches, PREG_SET_ORDER);
+
+        foreach ($matches as $m) {
+            $data[$m[1]] = $m[2] ? $m[2] : $m[3];
+            unset($needed_parts[$m[1]]);
+        }
+
+        return $needed_parts ? false : $data;
+
+    }
+
+}