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-rw-r--r--includes/libs/Cookie.php291
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diff --git a/includes/libs/Cookie.php b/includes/libs/Cookie.php
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+<?php
+/**
+ * Cookie for HTTP requests.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup HTTP
+ */
+
+class Cookie {
+ protected $name;
+ protected $value;
+ protected $expires;
+ protected $path;
+ protected $domain;
+ protected $isSessionKey = true;
+ // TO IMPLEMENT protected $secure
+ // TO IMPLEMENT? protected $maxAge (add onto expires)
+ // TO IMPLEMENT? protected $version
+ // TO IMPLEMENT? protected $comment
+
+ function __construct( $name, $value, $attr ) {
+ $this->name = $name;
+ $this->set( $value, $attr );
+ }
+
+ /**
+ * Sets a cookie. Used before a request to set up any individual
+ * cookies. Used internally after a request to parse the
+ * Set-Cookie headers.
+ *
+ * @param string $value The value of the cookie
+ * @param array $attr Possible key/values:
+ * expires A date string
+ * path The path this cookie is used on
+ * domain Domain this cookie is used on
+ * @throws InvalidArgumentException
+ */
+ public function set( $value, $attr ) {
+ $this->value = $value;
+
+ if ( isset( $attr['expires'] ) ) {
+ $this->isSessionKey = false;
+ $this->expires = strtotime( $attr['expires'] );
+ }
+
+ if ( isset( $attr['path'] ) ) {
+ $this->path = $attr['path'];
+ } else {
+ $this->path = '/';
+ }
+
+ if ( isset( $attr['domain'] ) ) {
+ if ( self::validateCookieDomain( $attr['domain'] ) ) {
+ $this->domain = $attr['domain'];
+ }
+ } else {
+ throw new InvalidArgumentException( '$attr must contain a domain' );
+ }
+ }
+
+ /**
+ * Return the true if the cookie is valid is valid. Otherwise,
+ * false. The uses a method similar to IE cookie security
+ * described here:
+ * http://kuza55.blogspot.com/2008/02/understanding-cookie-security.html
+ * A better method might be to use a blacklist like
+ * http://publicsuffix.org/
+ *
+ * @todo fixme fails to detect 3-letter top-level domains
+ * @todo fixme fails to detect 2-letter top-level domains for single-domain use (probably
+ * not a big problem in practice, but there are test cases)
+ *
+ * @param string $domain The domain to validate
+ * @param string $originDomain (optional) the domain the cookie originates from
+ * @return bool
+ */
+ public static function validateCookieDomain( $domain, $originDomain = null ) {
+ $dc = explode( ".", $domain );
+
+ // Don't allow a trailing dot or addresses without a or just a leading dot
+ if ( substr( $domain, -1 ) == '.' ||
+ count( $dc ) <= 1 ||
+ count( $dc ) == 2 && $dc[0] === ''
+ ) {
+ return false;
+ }
+
+ // Only allow full, valid IP addresses
+ if ( preg_match( '/^[0-9.]+$/', $domain ) ) {
+ if ( count( $dc ) != 4 ) {
+ return false;
+ }
+
+ if ( ip2long( $domain ) === false ) {
+ return false;
+ }
+
+ if ( $originDomain == null || $originDomain == $domain ) {
+ return true;
+ }
+
+ }
+
+ // Don't allow cookies for "co.uk" or "gov.uk", etc, but allow "supermarket.uk"
+ if ( strrpos( $domain, "." ) - strlen( $domain ) == -3 ) {
+ if ( ( count( $dc ) == 2 && strlen( $dc[0] ) <= 2 )
+ || ( count( $dc ) == 3 && strlen( $dc[0] ) == "" && strlen( $dc[1] ) <= 2 ) ) {
+ return false;
+ }
+ if ( ( count( $dc ) == 2 || ( count( $dc ) == 3 && $dc[0] == '' ) )
+ && preg_match( '/(com|net|org|gov|edu)\...$/', $domain ) ) {
+ return false;
+ }
+ }
+
+ if ( $originDomain != null ) {
+ if ( substr( $domain, 0, 1 ) != '.' && $domain != $originDomain ) {
+ return false;
+ }
+
+ if ( substr( $domain, 0, 1 ) == '.'
+ && substr_compare(
+ $originDomain,
+ $domain,
+ -strlen( $domain ),
+ strlen( $domain ),
+ true
+ ) != 0
+ ) {
+ return false;
+ }
+ }
+
+ return true;
+ }
+
+ /**
+ * Serialize the cookie jar into a format useful for HTTP Request headers.
+ *
+ * @param string $path The path that will be used. Required.
+ * @param string $domain The domain that will be used. Required.
+ * @return string
+ */
+ public function serializeToHttpRequest( $path, $domain ) {
+ $ret = '';
+
+ if ( $this->canServeDomain( $domain )
+ && $this->canServePath( $path )
+ && $this->isUnExpired() ) {
+ $ret = $this->name . '=' . $this->value;
+ }
+
+ return $ret;
+ }
+
+ /**
+ * @param string $domain
+ * @return bool
+ */
+ protected function canServeDomain( $domain ) {
+ if ( $domain == $this->domain
+ || ( strlen( $domain ) > strlen( $this->domain )
+ && substr( $this->domain, 0, 1 ) == '.'
+ && substr_compare(
+ $domain,
+ $this->domain,
+ -strlen( $this->domain ),
+ strlen( $this->domain ),
+ true
+ ) == 0
+ )
+ ) {
+ return true;
+ }
+
+ return false;
+ }
+
+ /**
+ * @param string $path
+ * @return bool
+ */
+ protected function canServePath( $path ) {
+ return ( $this->path && substr_compare( $this->path, $path, 0, strlen( $this->path ) ) == 0 );
+ }
+
+ /**
+ * @return bool
+ */
+ protected function isUnExpired() {
+ return $this->isSessionKey || $this->expires > time();
+ }
+}
+
+class CookieJar {
+ private $cookie = array();
+
+ /**
+ * Set a cookie in the cookie jar. Make sure only one cookie per-name exists.
+ * @see Cookie::set()
+ * @param string $name
+ * @param string $value
+ * @param array $attr
+ */
+ public function setCookie( $name, $value, $attr ) {
+ /* cookies: case insensitive, so this should work.
+ * We'll still send the cookies back in the same case we got them, though.
+ */
+ $index = strtoupper( $name );
+
+ if ( isset( $this->cookie[$index] ) ) {
+ $this->cookie[$index]->set( $value, $attr );
+ } else {
+ $this->cookie[$index] = new Cookie( $name, $value, $attr );
+ }
+ }
+
+ /**
+ * @see Cookie::serializeToHttpRequest
+ * @param string $path
+ * @param string $domain
+ * @return string
+ */
+ public function serializeToHttpRequest( $path, $domain ) {
+ $cookies = array();
+
+ foreach ( $this->cookie as $c ) {
+ $serialized = $c->serializeToHttpRequest( $path, $domain );
+
+ if ( $serialized ) {
+ $cookies[] = $serialized;
+ }
+ }
+
+ return implode( '; ', $cookies );
+ }
+
+ /**
+ * Parse the content of an Set-Cookie HTTP Response header.
+ *
+ * @param string $cookie
+ * @param string $domain Cookie's domain
+ * @return null
+ */
+ public function parseCookieResponseHeader( $cookie, $domain ) {
+ $len = strlen( 'Set-Cookie:' );
+
+ if ( substr_compare( 'Set-Cookie:', $cookie, 0, $len, true ) === 0 ) {
+ $cookie = substr( $cookie, $len );
+ }
+
+ $bit = array_map( 'trim', explode( ';', $cookie ) );
+
+ if ( count( $bit ) >= 1 ) {
+ list( $name, $value ) = explode( '=', array_shift( $bit ), 2 );
+ $attr = array();
+
+ foreach ( $bit as $piece ) {
+ $parts = explode( '=', $piece );
+ if ( count( $parts ) > 1 ) {
+ $attr[strtolower( $parts[0] )] = $parts[1];
+ } else {
+ $attr[strtolower( $parts[0] )] = true;
+ }
+ }
+
+ if ( !isset( $attr['domain'] ) ) {
+ $attr['domain'] = $domain;
+ } elseif ( !Cookie::validateCookieDomain( $attr['domain'], $domain ) ) {
+ return null;
+ }
+
+ $this->setCookie( $name, $value, $attr );
+ }
+ }
+}
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