NullSecurityToken::getValue() - Code Metrics - Inspection of "API Apply SilverStripe\Security namespace" - silverstripe/silverstripe-framework - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#5741)

by Damian

created 2016-07-06 23:33 UTC

NullSecurityToken::getValue() A

↳ Parent: NullSecurityToken

Complexity

Conditions	1
Paths	1

Size

Total Lines	3
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	1
eloc	2
c	1
b	0
f	0
nc	1
nop	0
dl	0
loc	3
rs	10

<?php

namespace SilverStripe\Security;

use FieldList;
use Object;
use SS_HTTPRequest;
use TemplateGlobalProvider;
use Session;
use HiddenField;
use Controller;

/**
 * @package framework
 * @subpackage security
 */

/**
 * Cross Site Request Forgery (CSRF) protection for the {@link Form} class and other GET links.
 * Can be used globally (through {@link SecurityToken::inst()})
 * or on a form-by-form basis {@link Form->getSecurityToken()}.
 *
 * <b>Usage in forms</b>
 *
 * This protective measure is automatically turned on for all new {@link Form} instances,
 * and can be globally disabled through {@link disable()}.
 *
 * <b>Usage in custom controller actions</b>
 *
 * <code>
 * class MyController extends Controller {
 * 	function mygetaction($request) {
 * 		if(!SecurityToken::inst()->checkRequest($request)) return $this->httpError(400);
 *
 * 		// valid action logic ...
 * 	}
 * }
 * </code>
 *
 * @todo Make token name form specific for additional forgery protection.
 */
class SecurityToken extends Object implements TemplateGlobalProvider {

	/**
	 * @var String
	 */
	protected static $default_name = 'SecurityID';

	/**
	 * @var SecurityToken
	 */
	protected static $inst = null;

	/**
	 * @var boolean
	 */
	protected static $enabled = true;

	/**
	 * @var String $name
	 */
	protected $name = null;

	/**
	 * @param $name
	 */
	public function __construct($name = null) {
		$this->name = ($name) ? $name : self::get_default_name();
		parent::__construct();
	}

	/**
	 * Gets a global token (or creates one if it doesnt exist already).
	 *
	 * @return SecurityToken
	 */
	public static function inst() {
		if(!self::$inst) self::$inst = new SecurityToken();

		return self::$inst;
	}

	/**
	 * Globally disable the token (override with {@link NullSecurityToken})
	 * implementation. Note: Does not apply for
	 */
	public static function disable() {
		self::$enabled = false;
		self::$inst = new NullSecurityToken();
	}

	/**
	 * Globally enable tokens that have been previously disabled through {@link disable}.
	 */
	public static function enable() {
		self::$enabled = true;
		self::$inst = new SecurityToken();
	}

	/**
	 * @return boolean
	 */
	public static function is_enabled() {
		return self::$enabled;
	}

	/**
	 * @return String
	 */
	public static function get_default_name() {
		return self::$default_name;
	}

	/**
	 * Returns the value of an the global SecurityToken in the current session
	 * @return int
	 */
	public static function getSecurityID() {
		$token = SecurityToken::inst();
<?php

class Certificate {
    const TRIPLEDES_CBC = 'ASDFGHJKL';

    private $key;

    public function __construct()
    {
        $this->key = Certificate::TRIPLEDES_CBC;
    }
}
		return $token->getValue();
	}

	/**
	 * @param string $name
	 * @return string
	 */
	public function setName($name) {
		$val = $this->getValue();
		$this->name = $name;
		$this->setValue($val);
	}

	/**
	 * @return String
	 */
	public function getName() {
		return $this->name;
	}

	/**
	 * @return String
	 */
	public function getValue() {
		$value = Session::get($this->getName());

		// only regenerate if the token isn't already set in the session
		if(!$value) {
			$value = $this->generate();
			$this->setValue($value);
		}

		return $value;
	}

	/**
	 * @param String $val
	 */
	public function setValue($val) {
		Session::set($this->getName(), $val);
	}

	/**
	 * Reset the token to a new value.
	 */
	public function reset() {
		$this->setValue($this->generate());
	}

	/**
	 * Checks for an existing CSRF token in the current users session.
	 * This check is automatically performed in {@link Form->httpSubmission()}
	 * if a form has security tokens enabled.
	 * This direct check is mainly used for URL actions on {@link FormField} that are not routed
	 * through {@link Form->httpSubmission()}.
	 *
	 * Typically you'll want to check {@link Form->securityTokenEnabled()} before calling this method.
	 *
	 * @param String $compare
	 * @return Boolean
	 */
	public function check($compare) {
		return ($compare && $this->getValue() && $compare == $this->getValue());
	}

	/**
	 * See {@link check()}.
	 *
	 * @param SS_HTTPRequest $request
	 * @return bool
	 */
	public function checkRequest($request) {
		$token = $this->getRequestToken($request);
		return $this->check($token);
	}

	/**
	 * Get security token from request
	 *
	 * @param SS_HTTPREquest $request
	 * @return string
	 */
	protected function getRequestToken($request) {
		$name = $this->getName();
		$header = 'X-' . ucwords(strtolower($name));
		if($token = $request->getHeader($header)) {
			return $token;
		}

		// Get from request var
		return $request->requestVar($name);
	}

	/**
	 * Note: Doesn't call {@link FormField->setForm()}
	 * on the returned {@link HiddenField}, you'll need to take
	 * care of this yourself.
	 *
	 * @param FieldList $fieldset
	 * @return HiddenField|false
	 */
	public function updateFieldSet(&$fieldset) {
		if(!$fieldset->fieldByName($this->getName())) {
			$field = new HiddenField($this->getName(), null, $this->getValue());
			$fieldset->push($field);
			return $field;
		} else {
			return false;
		}
	}

	/**
	 * @param String $url
	 * @return String
	 */
	public function addToUrl($url) {
		return Controller::join_links($url, sprintf('?%s=%s', $this->getName(), $this->getValue()));
	}

	/**
	 * You can't disable an existing instance, it will need to be overwritten like this:
	 * <code>
	 * $old = SecurityToken::inst(); // isEnabled() returns true
	 * SecurityToken::disable();
	 * $new = SecurityToken::inst(); // isEnabled() returns false
	 * </code>
	 *
	 * @return boolean
	 */
	public function isEnabled() {
		return !($this instanceof NullSecurityToken);
	}

	/**
	 * @uses RandomGenerator
	 *
	 * @return String
	 */
	protected function generate() {
		$generator = new RandomGenerator();
		return $generator->randomToken('sha1');
	}

	public static function get_template_global_variables() {
		return array(
			'getSecurityID',
			'SecurityID' => 'getSecurityID'
		);
	}
}

/**
 * Specialized subclass for disabled security tokens - always returns
 * TRUE for token checks. Use through {@link SecurityToken::disable()}.
 */
class NullSecurityToken extends SecurityToken {

	/**
	 * @param String
	 * @return boolean
	 */
	public function check($compare) {
		return true;
	}

	/**
	 * @param SS_HTTPRequest $request
	 * @return Boolean
	 */
	public function checkRequest($request) {
		return true;
	}

	/**
	 * @param FieldList $fieldset
	 * @return false
	 */
	public function updateFieldSet(&$fieldset) {
		// Remove, in case it was added beforehand
		$fieldset->removeByName($this->getName());

		return false;
	}

	/**
	 * @param String $url
	 * @return String
	 */
	public function addToUrl($url) {
		return $url;
	}

	/**
	 * @return String
	 */
	public function getValue() {
		return null;
	}

	/**
	 * @param String $val
	 */
	public function setValue($val) {
		// no-op
	}

	/**
	 * @return String
	 */
	public function generate() {
		return null;
	}
}


1			<?php
2
3			namespace SilverStripe\Security;
4
5			use FieldList;
6			use Object;
7			use SS_HTTPRequest;
8			use TemplateGlobalProvider;
9			use Session;
10			use HiddenField;
11			use Controller;
12
13			/**
14			* @package framework
15			* @subpackage security
16			*/
17
18			/**
19			* Cross Site Request Forgery (CSRF) protection for the {@link Form} class and other GET links.
20			* Can be used globally (through {@link SecurityToken::inst()})
21			* or on a form-by-form basis {@link Form->getSecurityToken()}.
22			*
23			* <b>Usage in forms</b>
24			*
25			* This protective measure is automatically turned on for all new {@link Form} instances,
26			* and can be globally disabled through {@link disable()}.
27			*
28			* <b>Usage in custom controller actions</b>
29			*
30			* <code>
31			* class MyController extends Controller {
32			* function mygetaction($request) {
33			* if(!SecurityToken::inst()->checkRequest($request)) return $this->httpError(400);
34			*
35			* // valid action logic ...
36			* }
37			* }
38			* </code>
39			*
40			* @todo Make token name form specific for additional forgery protection.
41			*/
42			class SecurityToken extends Object implements TemplateGlobalProvider {
43
44			/**
45			* @var String
46			*/
47			protected static $default_name = 'SecurityID';
48
49			/**
50			* @var SecurityToken
51			*/
52			protected static $inst = null;
53
54			/**
55			* @var boolean
56			*/
57			protected static $enabled = true;
58
59			/**
60			* @var String $name
61			*/
62			protected $name = null;
63
64			/**
65			* @param $name
66			*/
67			public function __construct($name = null) {
68			$this->name = ($name) ? $name : self::get_default_name();
69			parent::__construct();
70			}
71
72			/**
73			* Gets a global token (or creates one if it doesnt exist already).
74			*
75			* @return SecurityToken
76			*/
77			public static function inst() {
78			if(!self::$inst) self::$inst = new SecurityToken();
79
80			return self::$inst;
81			}
82
83			/**
84			* Globally disable the token (override with {@link NullSecurityToken})
85			* implementation. Note: Does not apply for
86			*/
87			public static function disable() {
88			self::$enabled = false;
89			self::$inst = new NullSecurityToken();
90			}
91
92			/**
93			* Globally enable tokens that have been previously disabled through {@link disable}.
94			*/
95			public static function enable() {
96			self::$enabled = true;
97			self::$inst = new SecurityToken();
98			}
99
100			/**
101			* @return boolean
102			*/
103			public static function is_enabled() {
104			return self::$enabled;
105			}
106
107			/**
108			* @return String
109			*/
110			public static function get_default_name() {
111			return self::$default_name;
112			}
113
114			/**
115			* Returns the value of an the global SecurityToken in the current session
116			* @return int
117			*/
118			public static function getSecurityID() {
119			$token = SecurityToken::inst();
			0 ignored issues – show Coding Style introduced 2016-06-29 00:25 UTC by Report Bug Copy Issue Report As per coding style, `self` should be used for accessing local static members. This check looks for accesses to local static members using the fully qualified name instead of `self::`. <?php class Certificate { const TRIPLEDES_CBC = 'ASDFGHJKL'; private $key; public function __construct() { $this->key = Certificate::TRIPLEDES_CBC; } } While this is perfectly valid, the fully qualified name of `Certificate::TRIPLEDES_CBC` could just as well be replaced by `self::TRIPLEDES_CBC`. Referencing local members with `self::` assured the access will still work when the class is renamed, makes it perfectly clear that the member is in fact local and will usually be shorter. Loading history...
120			return $token->getValue();
121			}
122
123			/**
124			* @param string $name
125			* @return string
126			*/
127			public function setName($name) {
128			$val = $this->getValue();
129			$this->name = $name;
130			$this->setValue($val);
131			}
132
133			/**
134			* @return String
135			*/
136			public function getName() {
137			return $this->name;
138			}
139
140			/**
141			* @return String
142			*/
143			public function getValue() {
144			$value = Session::get($this->getName());
145
146			// only regenerate if the token isn't already set in the session
147			if(!$value) {
148			$value = $this->generate();
149			$this->setValue($value);
150			}
151
152			return $value;
153			}
154
155			/**
156			* @param String $val
157			*/
158			public function setValue($val) {
159			Session::set($this->getName(), $val);
160			}
161
162			/**
163			* Reset the token to a new value.
164			*/
165			public function reset() {
166			$this->setValue($this->generate());
167			}
168
169			/**
170			* Checks for an existing CSRF token in the current users session.
171			* This check is automatically performed in {@link Form->httpSubmission()}
172			* if a form has security tokens enabled.
173			* This direct check is mainly used for URL actions on {@link FormField} that are not routed
174			* through {@link Form->httpSubmission()}.
175			*
176			* Typically you'll want to check {@link Form->securityTokenEnabled()} before calling this method.
177			*
178			* @param String $compare
179			* @return Boolean
180			*/
181			public function check($compare) {
182			return ($compare && $this->getValue() && $compare == $this->getValue());
183			}
184
185			/**
186			* See {@link check()}.
187			*
188			* @param SS_HTTPRequest $request
189			* @return bool
190			*/
191			public function checkRequest($request) {
192			$token = $this->getRequestToken($request);
193			return $this->check($token);
194			}
195
196			/**
197			* Get security token from request
198			*
199			* @param SS_HTTPREquest $request
200			* @return string
201			*/
202			protected function getRequestToken($request) {
203			$name = $this->getName();
204			$header = 'X-' . ucwords(strtolower($name));
205			if($token = $request->getHeader($header)) {
206			return $token;
207			}
208
209			// Get from request var
210			return $request->requestVar($name);
211			}
212
213			/**
214			* Note: Doesn't call {@link FormField->setForm()}
215			* on the returned {@link HiddenField}, you'll need to take
216			* care of this yourself.
217			*
218			* @param FieldList $fieldset
219			* @return HiddenField\|false
220			*/
221			public function updateFieldSet(&$fieldset) {
222			if(!$fieldset->fieldByName($this->getName())) {
223			$field = new HiddenField($this->getName(), null, $this->getValue());
224			$fieldset->push($field);
225			return $field;
226			} else {
227			return false;
228			}
229			}
230
231			/**
232			* @param String $url
233			* @return String
234			*/
235			public function addToUrl($url) {
236			return Controller::join_links($url, sprintf('?%s=%s', $this->getName(), $this->getValue()));
237			}
238
239			/**
240			* You can't disable an existing instance, it will need to be overwritten like this:
241			* <code>
242			* $old = SecurityToken::inst(); // isEnabled() returns true
243			* SecurityToken::disable();
244			* $new = SecurityToken::inst(); // isEnabled() returns false
245			* </code>
246			*
247			* @return boolean
248			*/
249			public function isEnabled() {
250			return !($this instanceof NullSecurityToken);
251			}
252
253			/**
254			* @uses RandomGenerator
255			*
256			* @return String
257			*/
258			protected function generate() {
259			$generator = new RandomGenerator();
260			return $generator->randomToken('sha1');
261			}
262
263			public static function get_template_global_variables() {
264			return array(
265			'getSecurityID',
266			'SecurityID' => 'getSecurityID'
267			);
268			}
269			}
270
271			/**
272			* Specialized subclass for disabled security tokens - always returns
273			* TRUE for token checks. Use through {@link SecurityToken::disable()}.
274			*/
275			class NullSecurityToken extends SecurityToken {
276
277			/**
278			* @param String
279			* @return boolean
280			*/
281			public function check($compare) {
282			return true;
283			}
284
285			/**
286			* @param SS_HTTPRequest $request
287			* @return Boolean
288			*/
289			public function checkRequest($request) {
290			return true;
291			}
292
293			/**
294			* @param FieldList $fieldset
295			* @return false
296			*/
297			public function updateFieldSet(&$fieldset) {
298			// Remove, in case it was added beforehand
299			$fieldset->removeByName($this->getName());
300
301			return false;
302			}
303
304			/**
305			* @param String $url
306			* @return String
307			*/
308			public function addToUrl($url) {
309			return $url;
310			}
311
312			/**
313			* @return String
314			*/
315			public function getValue() {
316			return null;
317			}
318
319			/**
320			* @param String $val
321			*/
322			public function setValue($val) {
323			// no-op
324			}
325
326			/**
327			* @return String
328			*/
329			public function generate() {
330			return null;
331			}
332			}
333

silverstripe / silverstripe-framework

Pull Request — master (#5741)

NullSecurityToken::getValue() A

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