Issues in FacebookSignedRequestFromInputHelper.php (master) - Issues in master - facebook/facebook-php-sdk-v4 - Measure and Improve Code Quality continuously with Scrutinizer

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Cross-Site Scripting

Cross-Site Scripting enables an attacker to inject code into the response of a web-request that is viewed by other users. It can for example be used to bypass access controls, or even to take over other users' accounts.

File Exposure

File Exposure allows an attacker to gain access to local files that he should not be able to access. These files can for example include database credentials, or other configuration files.

File Manipulation

File Manipulation enables an attacker to write custom data to files. This potentially leads to injection of arbitrary code on the server.

Object Injection

Object Injection enables an attacker to inject an object into PHP code, and can lead to arbitrary code execution, file exposure, or file manipulation attacks.

Code Injection

Code Injection enables an attacker to execute arbitrary code on the server.

Response Splitting

Response Splitting can be used to send arbitrary responses.

File Inclusion

File Inclusion enables an attacker to inject custom files into PHP's file loading mechanism, either explicitly passed to include, or for example via PHP's auto-loading mechanism.

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Command Injection enables an attacker to inject a shell command that is execute with the privileges of the web-server. This can be used to expose sensitive data, or gain access of your server.

SQL Injection

SQL Injection enables an attacker to execute arbitrary SQL code on your database server gaining access to user data, or manipulating user data.

XPath Injection

XPath Injection enables an attacker to modify the parts of XML document that are read. If that XML document is for example used for authentication, this can lead to further vulnerabilities similar to SQL Injection.

LDAP Injection

LDAP Injection enables an attacker to inject LDAP statements potentially granting permission to run unauthorized queries, or modify content inside the LDAP tree.

Header Injection

Other Vulnerability

This category comprises other attack vectors such as manipulating the PHP runtime, loading custom extensions, freezing the runtime, or similar.

Regex Injection

Regex Injection enables an attacker to execute arbitrary code in your PHP process.

XML Injection

XML Injection enables an attacker to read files on your local filesystem including configuration files, or can be abused to freeze your web-server process.

Variable Injection

Variable Injection enables an attacker to overwrite program variables with custom data, and can lead to further vulnerabilities.

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Helpers/FacebookSignedRequestFromInputHelper.php (2 issues)

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Coding Style 2

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Minor 2

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<?php
/**
 * Copyright 2016 Facebook, Inc.
 *
 * You are hereby granted a non-exclusive, worldwide, royalty-free license to
 * use, copy, modify, and distribute this software in source code or binary
 * form for use in connection with the web services and APIs provided by
 * Facebook.
 *
 * As with any software that integrates with the Facebook platform, your use
 * of this software is subject to the Facebook Developer Principles and
 * Policies [http://developers.facebook.com/policy/]. This copyright notice
 * shall be included in all copies or substantial portions of the software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 */
namespace Facebook\Helpers;

use Facebook\Facebook;
use Facebook\FacebookApp;
use Facebook\FacebookClient;
use Facebook\SignedRequest;
use Facebook\Authentication\AccessToken;
use Facebook\Authentication\OAuth2Client;

/**
 * Class FacebookSignedRequestFromInputHelper
 *
 * @package Facebook
 */
abstract class FacebookSignedRequestFromInputHelper
{
    /**
     * @var SignedRequest|null The SignedRequest entity.
     */
    protected $signedRequest;

    /**
     * @var FacebookApp The FacebookApp entity.
     */
    protected $app;

    /**
     * @var OAuth2Client The OAuth 2.0 client service.
     */
    protected $oAuth2Client;

    /**
     * Initialize the helper and process available signed request data.
     *
     * @param FacebookApp    $app          The FacebookApp entity.
     * @param FacebookClient $client       The client to make HTTP requests.
     * @param string|null    $graphVersion The version of Graph to use.
     */
    public function __construct(FacebookApp $app, FacebookClient $client, $graphVersion = null)
    {
        $this->app = $app;
        $graphVersion = $graphVersion ?: Facebook::DEFAULT_GRAPH_VERSION;
        $this->oAuth2Client = new OAuth2Client($this->app, $client, $graphVersion);

        $this->instantiateSignedRequest();
    }

    /**
     * Instantiates a new SignedRequest entity.
     *
     * @param string|null
     */
    public function instantiateSignedRequest($rawSignedRequest = null)
    {
        $rawSignedRequest = $rawSignedRequest ?: $this->getRawSignedRequest();

        if (!$rawSignedRequest) {
            return;
        }

        $this->signedRequest = new SignedRequest($this->app, $rawSignedRequest);
    }

    /**
     * Returns an AccessToken entity from the signed request.
     *
     * @return AccessToken|null
     *
     * @throws \Facebook\Exceptions\FacebookSDKException
     */
    public function getAccessToken()
    {
        if ($this->signedRequest && $this->signedRequest->hasOAuthData()) {
            $code = $this->signedRequest->get('code');
            $accessToken = $this->signedRequest->get('oauth_token');

            if ($code && !$accessToken) {
                return $this->oAuth2Client->getAccessTokenFromCode($code);
            }

            $expiresAt = $this->signedRequest->get('expires', 0);

            return new AccessToken($accessToken, $expiresAt);
        }

        return null;
    }

    /**
     * Returns the SignedRequest entity.
     *
     * @return SignedRequest|null
     */
    public function getSignedRequest()
    {
        return $this->signedRequest;
    }

    /**
     * Returns the user_id if available.
     *
     * @return string|null
     */
    public function getUserId()
    {
        return $this->signedRequest ? $this->signedRequest->getUserId() : null;
    }

    /**
     * Get raw signed request from input.
     *
     * @return string|null
     */
    abstract public function getRawSignedRequest();

    /**
     * Get raw signed request from POST input.
     *
     * @return string|null
     */
    public function getRawSignedRequestFromPost()
// Bad
class Router
{
    public function generate($path)
    {
        return $_SERVER['HOST'].$path;
    }
}

// Better
class Router
{
    private $host;

    public function __construct($host)
    {
        $this->host = $host;
    }

    public function generate($path)
    {
        return $this->host.$path;
    }
}

class Controller
{
    public function myAction(Request $request)
    {
        // Instead of
        $page = isset($_GET['page']) ? intval($_GET['page']) : 1;

        // Better (assuming you use the Symfony2 request)
        $page = $request->query->get('page', 1);
    }
}
    {
        if (isset($_POST['signed_request'])) {
            return $_POST['signed_request'];
        }

        return null;
    }

    /**
     * Get raw signed request from cookie set from the Javascript SDK.
     *
     * @return string|null
     */
    public function getRawSignedRequestFromCookie()
// Bad
class Router
{
    public function generate($path)
    {
        return $_SERVER['HOST'].$path;
    }
}

// Better
class Router
{
    private $host;

    public function __construct($host)
    {
        $this->host = $host;
    }

    public function generate($path)
    {
        return $this->host.$path;
    }
}

class Controller
{
    public function myAction(Request $request)
    {
        // Instead of
        $page = isset($_GET['page']) ? intval($_GET['page']) : 1;

        // Better (assuming you use the Symfony2 request)
        $page = $request->query->get('page', 1);
    }
}
    {
        if (isset($_COOKIE['fbsr_' . $this->app->getId()])) {
            return $_COOKIE['fbsr_' . $this->app->getId()];
        }

        return null;
    }
}


1			<?php
2			/**
3			* Copyright 2016 Facebook, Inc.
4			*
5			* You are hereby granted a non-exclusive, worldwide, royalty-free license to
6			* use, copy, modify, and distribute this software in source code or binary
7			* form for use in connection with the web services and APIs provided by
8			* Facebook.
9			*
10			* As with any software that integrates with the Facebook platform, your use
11			* of this software is subject to the Facebook Developer Principles and
12			* Policies [http://developers.facebook.com/policy/]. This copyright notice
13			* shall be included in all copies or substantial portions of the software.
14			*
15			* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16			* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17			* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18			* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19			* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20			* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21			* DEALINGS IN THE SOFTWARE.
22			*
23			*/
24			namespace Facebook\Helpers;
25
26			use Facebook\Facebook;
27			use Facebook\FacebookApp;
28			use Facebook\FacebookClient;
29			use Facebook\SignedRequest;
30			use Facebook\Authentication\AccessToken;
31			use Facebook\Authentication\OAuth2Client;
32
33			/**
34			* Class FacebookSignedRequestFromInputHelper
35			*
36			* @package Facebook
37			*/
38			abstract class FacebookSignedRequestFromInputHelper
39			{
40			/**
41			* @var SignedRequest\|null The SignedRequest entity.
42			*/
43			protected $signedRequest;
44
45			/**
46			* @var FacebookApp The FacebookApp entity.
47			*/
48			protected $app;
49
50			/**
51			* @var OAuth2Client The OAuth 2.0 client service.
52			*/
53			protected $oAuth2Client;
54
55			/**
56			* Initialize the helper and process available signed request data.
57			*
58			* @param FacebookApp $app The FacebookApp entity.
59			* @param FacebookClient $client The client to make HTTP requests.
60			* @param string\|null $graphVersion The version of Graph to use.
61			*/
62			public function __construct(FacebookApp $app, FacebookClient $client, $graphVersion = null)
63			{
64			$this->app = $app;
65			$graphVersion = $graphVersion ?: Facebook::DEFAULT_GRAPH_VERSION;
66			$this->oAuth2Client = new OAuth2Client($this->app, $client, $graphVersion);
67
68			$this->instantiateSignedRequest();
69			}
70
71			/**
72			* Instantiates a new SignedRequest entity.
73			*
74			* @param string\|null
75			*/
76			public function instantiateSignedRequest($rawSignedRequest = null)
77			{
78			$rawSignedRequest = $rawSignedRequest ?: $this->getRawSignedRequest();
79
80			if (!$rawSignedRequest) {
81			return;
82			}
83
84			$this->signedRequest = new SignedRequest($this->app, $rawSignedRequest);
85			}
86
87			/**
88			* Returns an AccessToken entity from the signed request.
89			*
90			* @return AccessToken\|null
91			*
92			* @throws \Facebook\Exceptions\FacebookSDKException
93			*/
94			public function getAccessToken()
95			{
96			if ($this->signedRequest && $this->signedRequest->hasOAuthData()) {
97			$code = $this->signedRequest->get('code');
98			$accessToken = $this->signedRequest->get('oauth_token');
99
100			if ($code && !$accessToken) {
101			return $this->oAuth2Client->getAccessTokenFromCode($code);
102			}
103
104			$expiresAt = $this->signedRequest->get('expires', 0);
105
106			return new AccessToken($accessToken, $expiresAt);
107			}
108
109			return null;
110			}
111
112			/**
113			* Returns the SignedRequest entity.
114			*
115			* @return SignedRequest\|null
116			*/
117			public function getSignedRequest()
118			{
119			return $this->signedRequest;
120			}
121
122			/**
123			* Returns the user_id if available.
124			*
125			* @return string\|null
126			*/
127			public function getUserId()
128			{
129			return $this->signedRequest ? $this->signedRequest->getUserId() : null;
130			}
131
132			/**
133			* Get raw signed request from input.
134			*
135			* @return string\|null
136			*/
137			abstract public function getRawSignedRequest();
138
139			/**
140			* Get raw signed request from POST input.
141			*
142			* @return string\|null
143			*/
144			public function getRawSignedRequestFromPost()
			0 ignored issues – show Coding Style introduced 2015-12-04 22:06 UTC by Report Bug Copy Issue Report Show Similar Issues like this `getRawSignedRequestFromPost` uses the super-global variable `$_POST` which is generally not recommended. Instead of super-globals, we recommend to explicitly inject the dependencies of your class. This makes your code less dependent on global state and it becomes generally more testable: // Bad class Router { public function generate($path) { return $_SERVER['HOST'].$path; } } // Better class Router { private $host; public function __construct($host) { $this->host = $host; } public function generate($path) { return $this->host.$path; } } class Controller { public function myAction(Request $request) { // Instead of $page = isset($_GET['page']) ? intval($_GET['page']) : 1; // Better (assuming you use the Symfony2 request) $page = $request->query->get('page', 1); } } Loading history...
145			{
146			if (isset($_POST['signed_request'])) {
147			return $_POST['signed_request'];
148			}
149
150			return null;
151			}
152
153			/**
154			* Get raw signed request from cookie set from the Javascript SDK.
155			*
156			* @return string\|null
157			*/
158			public function getRawSignedRequestFromCookie()
			0 ignored issues – show Coding Style introduced 2015-12-04 22:06 UTC by Report Bug Copy Issue Report Show Similar Issues like this `getRawSignedRequestFromCookie` uses the super-global variable `$_COOKIE` which is generally not recommended. Instead of super-globals, we recommend to explicitly inject the dependencies of your class. This makes your code less dependent on global state and it becomes generally more testable: // Bad class Router { public function generate($path) { return $_SERVER['HOST'].$path; } } // Better class Router { private $host; public function __construct($host) { $this->host = $host; } public function generate($path) { return $this->host.$path; } } class Controller { public function myAction(Request $request) { // Instead of $page = isset($_GET['page']) ? intval($_GET['page']) : 1; // Better (assuming you use the Symfony2 request) $page = $request->query->get('page', 1); } } Loading history...
159			{
160			if (isset($_COOKIE['fbsr_' . $this->app->getId()])) {
161			return $_COOKIE['fbsr_' . $this->app->getId()];
162			}
163
164			return null;
165			}
166			}
167

facebook / facebook-php-sdk-v4

Issues (175)

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Helpers/FacebookSignedRequestFromInputHelper.php (2 issues)

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