APIAuthentication::tryDigestAuthentication() - Code Metrics - Inspection of "Merge pull request #147 from michalsn/patch/patch-..." - ci-bonfire/Sprint - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — develop ( ce69c9...06e1bf )

by Lonnie

created 2016-01-10 03:22 UTC

APIAuthentication::tryDigestAuthentication() D

↳ Parent: APIAuthentication

Complexity

Conditions	13
Paths	207

Size

Total Lines	84
Code Lines	39

Duplication

Lines	20
Ratio	23.81 %

Importance

Changes	2
Bugs	0	Features	1

Metric	Value
c	2
b	0
f	1
dl	20
loc	84
rs	4.5364
cc	13
eloc	39
nc	207
nop	0

How to fix Long Method Complexity

<?php namespace Myth\Api\Auth;
/**
 * Sprint
 *
 * A set of power tools to enhance the CodeIgniter framework and provide consistent workflow.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission 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.
 *
 * @package     Sprint
 * @author      Lonnie Ezell
 * @copyright   Copyright 2014-2015, New Myth Media, LLC (http://newmythmedia.com)
 * @license     http://opensource.org/licenses/MIT  (MIT)
 * @link        http://sprintphp.com
 * @since       Version 1.0
 */

use Myth\Auth\LocalAuthentication;
use Myth\Events;

/**
 * Class APIAuthentication
 * 
 * @package Myth\Api\Auth
 */
class APIAuthentication extends LocalAuthentication {

	protected $logged_in = false;

	protected $realm = 'WallyWorld';

	protected $email = null;

	//--------------------------------------------------------------------

	public function __construct($ci=null)
	{
		parent::__construct($ci);

		$this->ci->config->load('api');
		$this->ci->lang->load('api');

		// Has the IP address been blacklisted?
		if (config_item('auth.ip_blacklist_enabled'))
		{
			$this->checkIPBlacklist();
		}

		// Do we need to do whitelisting?
		if (config_item('auth.ip_whitelist_enabled'))
		{
			$this->checkIPWhitelist();
		}
	}

	//--------------------------------------------------------------------

	/**
	 * Sets the realm used by the authentication. The system truly only
	 * supports a single realm across the entire application, but this
	 * allows it to be set by the controller.
	 *
	 * @param $realm
	 *
	 * @return $this
	 */
	public function setRealm($realm)
	{
	    $this->realm = $realm;
		return $this;
	}

	//--------------------------------------------------------------------

	/**
	 * Checks to see if someone is authorized via HTTP Basic Authentication.
	 *
	 * @return bool
	 */
	public function tryBasicAuthentication()
	{
		$username = null;
		$password = null;

		// mod_php
		if ($this->ci->input->server('PHP_AUTH_USER')) {
			$username = $this->ci->input->server('PHP_AUTH_USER');
			$password = $this->ci->input->server('PHP_AUTH_PW');
		}

		// most other servers
		elseif ($this->ci->input->server('HTTP_AUTHENTICATION')) {
			if (strpos(strtolower($this->ci->input->server('HTTP_AUTHENTICATION')), 'basic') === 0) {
				list($username, $password) = explode(':', base64_decode(substr($this->ci->input->server('HTTP_AUTHORIZATION'), 6)));
			}
		}

		// If credentials weren't provided, we can't do anything
		// so request authorization by the client.
		if (empty($username) || empty($password))
		{
			$this->ci->output->set_header('WWW-Authenticate: Basic realm="'. config_item('api.realm') .'"');
			return false;
		}

		$data = [
			config_item('api.auth_field') => $username,
			'password'  => $password
		];

		// Set email for later throttling check
		if (config_item('api.auth_field') === 'email')
		{
			$this->email = $username;
		}

	    $user = $this->validate($data, true);

		$this->user = $user;

		return $user;
	}

	//--------------------------------------------------------------------

	/**
	 * Checks to see if someone is authorized via HTTP Digest Authentication.
	 *
	 * NOTE: This requires that a new field, 'digest_key', be added to the user's
	 * table and, during new user creation, or password reset, that the digest_key
	 * be calculated as md5({username}:{realm}:{password})
	 *
	 * References:
	 *  - http://www.faqs.org/rfcs/rfc2617.html
	 *  - http://www.sitepoint.com/understanding-http-digest-access-authentication/
	 */
	public function tryDigestAuthentication()
	{
		$digest_string = '';

		// We need to test which server authentication variable to use
		// because the PHP ISAPI module in IIS acts different from CGI
		if ($this->ci->input->server('PHP_AUTH_DIGEST'))
		{
			$digest_string = $this->ci->input->server('PHP_AUTH_DIGEST');
		}
		elseif ($this->ci->input->server('HTTP_AUTHORIZATION'))
		{
			$digest_string = $this->ci->input->server('HTTP_AUTHORIZATION');
		}

		$nonce = md5(uniqid());
		$opaque = md5(uniqid());

		// No digest string? Then you're done. Go home.
		if (empty($digest_string))
		{
			$this->ci->output->set_header( sprintf('WWW-Authenticate: Digest realm="%s", nonce="%s", opaque="%s"', config_item('api.realm'), $nonce, $opaque) );
			return false;
		}

		// Grab the parts from the digest string.
		// They will be provided as an array of the parts: username, nonce, uri, nc, cnonce, qop, response
		$matches = [];
		preg_match_all('@(username|nonce|uri|nc|cnonce|qop|response)=[\'"]?([^\'",]+)@', $digest_string, $matches);
		$digest = (empty($matches[1]) || empty($matches[2])) ? array() : array_combine($matches[1], $matches[2]);

		if (! array_key_exists('username', $digest))
		{
			$this->ci->output->set_header( sprintf('WWW-Authenticate: Digest realm="%s", nonce="%s", opaque="%s"', config_item('api.realm'), $nonce, $opaque) );
			return false;
		}

		// Set email for later throttling check
		if (config_item('api.auth_field') === 'email')
		{
			$this->email = $digest['username'];
		}

		// Grab the user that corresponds to that "username"
		// exact field determined in the api config file - api.auth_field setting.
		$user = $this->user_model->as_array()->find_by( config_item('api.auth_field'), $digest['username'] );
		if (!  $user)

		{
			$this->ci->output->set_header( sprintf('WWW-Authenticate: Digest realm="%s", nonce="%s", opaque="%s"', config_item('api.realm'), $nonce, $opaque) );
			// If an email is used, log the attempt
            if (config_item('api.auth_field') === 'email')
            {
                $this->ci->login_model->recordLoginAttempt($digest['username']);
            }
			return false;
		}

		// Calc the correct response
		$A1 = $user['digest_key'];

		if ($digest['qop'] == 'auth')
		{
			$A2 = md5( strtoupper( $_SERVER['REQUEST_METHOD'] ) .':'. $digest['uri'] );
		} else {
			$body = file_get_contents('php://input');
			$A2 = md5( strtoupper( $_SERVER['REQUEST_METHOD'] ) .':'. $digest['uri'] .':'. md5($body) );
		}
		$valid_response = md5($A1 .':'. $digest['nonce'].':'. $digest['nc'] .':'. $digest['cnonce'] .':'. $digest['qop'] .':'. $A2);

		if ($digest['response'] != $valid_response)
		{
			$this->ci->output->set_header( sprintf('WWW-Authenticate: Digest realm="%s", nonce="%s", opaque="%s"', config_item('api.realm'), $nonce, $opaque) );
			// If an email is used, log the attempt
            if (config_item('api.auth_field') === 'email')
            {
                $this->ci->login_model->recordLoginAttempt($digest['username']);
            }
			return false;
		}

		$this->user = $user;

		return $user;
	}

	//--------------------------------------------------------------------

	/**
	 * Attempts to log a user into the API via the configured 'api.auth_type'
	 * config variable in config/api.php.
	 *
	 * NOTE: Since this is intended for API use, it is a STATELESS implementation
	 * and does not support remember me functionality.
	 *
	 * This basically replaces the login() method due to the way the AuthTrait
	 * works.
	 *
	 * @return bool
	 */
	public function viaRemember()
	{
		$user = false;

		switch (config_item('api.auth_type'))
		{
			case 'basic':
				$user = $this->tryBasicAuthentication();
				break;
			case 'digest':
				$user = $this->tryDigestAuthentication();
				break;
		}

		// If the user is throttled due to too many invalid logins
		// or the system is under attack, kick them back.
		// We need to test for this after validation because we
		// don't want it to affect a valid login.

		if ($this->email)
		{
			// If throttling time is above zero, we can't allow
			// logins now.
			if ($time = (int)$this->isThrottled($this->email) > 0)
			{
				$this->error = sprintf(lang('api.throttled'), $time);
				return false;
			}

			$this->email = null;
		}

		if (! $user)
		{
			$this->user = null;
			return $user;
		}

		$this->loginUser($user);

		Events::trigger('didLogin', [$user]);

		return true;
	}

	//--------------------------------------------------------------------

	//--------------------------------------------------------------------
	// Protected Methods
	//--------------------------------------------------------------------

	/**
	 * Checks the client's IP address against any IP addresses specified
	 * in the api config file. If any are found, the client is refused
	 * access immediately.
	 */
	public function checkIPBlacklist()
	{
	    $blacklist = explode(',', config_item('api.ip_blacklist'));

		array_walk($blacklist, function (&$item, $key) {
			$item = trim($item);
		});

		if (in_array($this->ci->input->ip_address(), $blacklist))
		{
			throw new \Exception( lang('api.ip_denied'), 401);
		}

		return true;
	}
	
	//--------------------------------------------------------------------

	/**
	 * Checks the client's IP address against any IP addresses specified
	 * in the api config file. If the client is not accessing the site
	 * from one of those addresses then their access is denied.
	 */
	public function checkIPWhitelist()
	{
		$whitelist = explode(',', config_item('api.ip_whitelist'));

		array_push($whitelist, '127.0.0.1', '0.0.0.0');

		array_walk($whitelist, function (&$item, $key) {
			$item = trim($item);
		});

		if (! in_array($this->ci->input->ip_address(), $whitelist))
		{
			throw new \Exception( lang('api.ip_denied'), 401);
		}

		return true;
	}

	//--------------------------------------------------------------------

	/**
	 * Handles the nitty gritty of actually logging our user into the system.
	 * Does NOT perform the authentication, just sets the system up so that
	 * it knows we're here.
	 *
	 * @param $user
	 */
	protected function loginUser($user)
	{
		// Save the user for later access
		$this->user = $user;

		// Clear our login attempts
		$this->ci->login_model->purgeLoginAttempts($user['email']);

		// We'll give a 20% chance to need to do a purge since we
		// don't need to purge THAT often, it's just a maintenance issue.
		// to keep the table from getting out of control.
		if (mt_rand(1, 100) < 20)
		{
			$this->ci->login_model->purgeOldRememberTokens();
		}
	}

	//--------------------------------------------------------------------
	
	//--------------------------------------------------------------------
	// UNUSED METHOD OVERRIDES
	//--------------------------------------------------------------------

	/**
	 * Attempt to log a user into the system.
	 *
	 * $credentials is an array of key/value pairs needed to log the user in.
	 * This is often email/password, or username/password.
	 *
	 * NOTE: Since this is intended for API use, it is a STATELESS implementation
	 * and does not support remember me functionality.
	 *
	 * Valid credentials:
	 *  - username
	 *  - email
	 *  - realm
	 *
	 * @param $credentials
	 * @param bool $remember
	 *
	 * @return bool|mixed|void
	 */
	public function login($credentials, $remember=false)
	{
		throw new \BadMethodCallException( lang('api.unused_method') );
	}

	//--------------------------------------------------------------------

	/**
	 * Logs a user out and removes all session information.
	 *
	 * NOTE: Since this is intended for API use, it is a STATELESS implementation
	 * and does not support remember me functionality.
	 *
	 * @return mixed
	 */
	public function logout()
	{
		throw new \BadMethodCallException( lang('api.unused_method') );
	}

	//--------------------------------------------------------------------

	/**
	 * Checks whether a user is logged in or not.
	 *
	 * @return bool
	 */
	public function isLoggedIn()
	{
		return $this->logged_in;
	}

	//--------------------------------------------------------------------

}


1		<?php namespace Myth\Api\Auth;
2		/**
3		* Sprint
4		*
5		* A set of power tools to enhance the CodeIgniter framework and provide consistent workflow.
6		*
7		* Permission is hereby granted, free of charge, to any person obtaining a copy
8		* of this software and associated documentation files (the "Software"), to deal
9		* in the Software without restriction, including without limitation the rights
10		* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11		* copies of the Software, and to permit persons to whom the Software is
12		* furnished to do so, subject to the following conditions:
13		*
14		* The above copyright notice and this permission notice shall be included in
15		* all copies or substantial portions of the Software.
16		*
17		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18		* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19		* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20		* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21		* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22		* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23		* THE SOFTWARE.
24		*
25		* @package Sprint
26		* @author Lonnie Ezell
27		* @copyright Copyright 2014-2015, New Myth Media, LLC (http://newmythmedia.com)
28		* @license http://opensource.org/licenses/MIT (MIT)
29		* @link http://sprintphp.com
30		* @since Version 1.0
31		*/
32
33		use Myth\Auth\LocalAuthentication;
34		use Myth\Events;
35
36		/**
37		* Class APIAuthentication
38		*
39		* @package Myth\Api\Auth
40		*/
41		class APIAuthentication extends LocalAuthentication {
42
43		protected $logged_in = false;
44
45		protected $realm = 'WallyWorld';
46
47		protected $email = null;
48
49		//--------------------------------------------------------------------
50
51		public function __construct($ci=null)
52		{
53		parent::__construct($ci);
54
55		$this->ci->config->load('api');
56		$this->ci->lang->load('api');
57
58		// Has the IP address been blacklisted?
59		if (config_item('auth.ip_blacklist_enabled'))
60		{
61		$this->checkIPBlacklist();
62		}
63
64		// Do we need to do whitelisting?
65		if (config_item('auth.ip_whitelist_enabled'))
66		{
67		$this->checkIPWhitelist();
68		}
69		}
70
71		//--------------------------------------------------------------------
72
73		/**
74		* Sets the realm used by the authentication. The system truly only
75		* supports a single realm across the entire application, but this
76		* allows it to be set by the controller.
77		*
78		* @param $realm
79		*
80		* @return $this
81		*/
82		public function setRealm($realm)
83		{
84		$this->realm = $realm;
85		return $this;
86		}
87
88		//--------------------------------------------------------------------
89
90		/**
91		* Checks to see if someone is authorized via HTTP Basic Authentication.
92		*
93		* @return bool
94		*/
95		public function tryBasicAuthentication()
96		{
97		$username = null;
98		$password = null;
99
100		// mod_php
101		if ($this->ci->input->server('PHP_AUTH_USER')) {
102		$username = $this->ci->input->server('PHP_AUTH_USER');
103		$password = $this->ci->input->server('PHP_AUTH_PW');
104		}
105
106		// most other servers
107		elseif ($this->ci->input->server('HTTP_AUTHENTICATION')) {
108		if (strpos(strtolower($this->ci->input->server('HTTP_AUTHENTICATION')), 'basic') === 0) {
109		list($username, $password) = explode(':', base64_decode(substr($this->ci->input->server('HTTP_AUTHORIZATION'), 6)));
110		}
111		}
112
113		// If credentials weren't provided, we can't do anything
114		// so request authorization by the client.
115		if (empty($username) \|\| empty($password))
116		{
117		$this->ci->output->set_header('WWW-Authenticate: Basic realm="'. config_item('api.realm') .'"');
118		return false;
119		}
120
121		$data = [
122		config_item('api.auth_field') => $username,
123		'password' => $password
124		];
125
126		// Set email for later throttling check
127		if (config_item('api.auth_field') === 'email')
128		{
129		$this->email = $username;
130		}
131
132		$user = $this->validate($data, true);
133
134		$this->user = $user;
135
136		return $user;
137		}
138
139		//--------------------------------------------------------------------
140
141		/**
142		* Checks to see if someone is authorized via HTTP Digest Authentication.
143		*
144		* NOTE: This requires that a new field, 'digest_key', be added to the user's
145		* table and, during new user creation, or password reset, that the digest_key
146		* be calculated as md5({username}:{realm}:{password})
147		*
148		* References:
149		* - http://www.faqs.org/rfcs/rfc2617.html
150		* - http://www.sitepoint.com/understanding-http-digest-access-authentication/
151		*/
152		public function tryDigestAuthentication()
153		{
154		$digest_string = '';
155
156		// We need to test which server authentication variable to use
157		// because the PHP ISAPI module in IIS acts different from CGI
158		if ($this->ci->input->server('PHP_AUTH_DIGEST'))
159		{
160		$digest_string = $this->ci->input->server('PHP_AUTH_DIGEST');
161		}
162		elseif ($this->ci->input->server('HTTP_AUTHORIZATION'))
163		{
164		$digest_string = $this->ci->input->server('HTTP_AUTHORIZATION');
165		}
166
167		$nonce = md5(uniqid());
168		$opaque = md5(uniqid());
169
170		// No digest string? Then you're done. Go home.
171		if (empty($digest_string))
172		{
173		$this->ci->output->set_header( sprintf('WWW-Authenticate: Digest realm="%s", nonce="%s", opaque="%s"', config_item('api.realm'), $nonce, $opaque) );
174		return false;
175		}
176
177		// Grab the parts from the digest string.
178		// They will be provided as an array of the parts: username, nonce, uri, nc, cnonce, qop, response
179		$matches = [];
180		preg_match_all('@(username\|nonce\|uri\|nc\|cnonce\|qop\|response)=[\'"]?([^\'",]+)@', $digest_string, $matches);
181		$digest = (empty($matches[1]) \|\| empty($matches[2])) ? array() : array_combine($matches[1], $matches[2]);
182
183		if (! array_key_exists('username', $digest))
184		{
185		$this->ci->output->set_header( sprintf('WWW-Authenticate: Digest realm="%s", nonce="%s", opaque="%s"', config_item('api.realm'), $nonce, $opaque) );
186		return false;
187		}
188
189		// Set email for later throttling check
190		if (config_item('api.auth_field') === 'email')
191		{
192		$this->email = $digest['username'];
193		}
194
195		// Grab the user that corresponds to that "username"
196		// exact field determined in the api config file - api.auth_field setting.
197		$user = $this->user_model->as_array()->find_by( config_item('api.auth_field'), $digest['username'] );
198	View Code Duplication	if (! $user)
		0 ignored issues – show Duplication introduced 2016-01-07 21:46 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
199		{
200		$this->ci->output->set_header( sprintf('WWW-Authenticate: Digest realm="%s", nonce="%s", opaque="%s"', config_item('api.realm'), $nonce, $opaque) );
201		// If an email is used, log the attempt
202		if (config_item('api.auth_field') === 'email')
203		{
204		$this->ci->login_model->recordLoginAttempt($digest['username']);
205		}
206		return false;
207		}
208
209		// Calc the correct response
210		$A1 = $user['digest_key'];
211
212		if ($digest['qop'] == 'auth')
213		{
214		$A2 = md5( strtoupper( $_SERVER['REQUEST_METHOD'] ) .':'. $digest['uri'] );
215		} else {
216		$body = file_get_contents('php://input');
217		$A2 = md5( strtoupper( $_SERVER['REQUEST_METHOD'] ) .':'. $digest['uri'] .':'. md5($body) );
218		}
219		$valid_response = md5($A1 .':'. $digest['nonce'].':'. $digest['nc'] .':'. $digest['cnonce'] .':'. $digest['qop'] .':'. $A2);
220
221	View Code Duplication	if ($digest['response'] != $valid_response)
222		{
223		$this->ci->output->set_header( sprintf('WWW-Authenticate: Digest realm="%s", nonce="%s", opaque="%s"', config_item('api.realm'), $nonce, $opaque) );
224		// If an email is used, log the attempt
225		if (config_item('api.auth_field') === 'email')
226		{
227		$this->ci->login_model->recordLoginAttempt($digest['username']);
228		}
229		return false;
230		}
231
232		$this->user = $user;
233
234		return $user;
235		}
236
237		//--------------------------------------------------------------------
238
239		/**
240		* Attempts to log a user into the API via the configured 'api.auth_type'
241		* config variable in config/api.php.
242		*
243		* NOTE: Since this is intended for API use, it is a STATELESS implementation
244		* and does not support remember me functionality.
245		*
246		* This basically replaces the login() method due to the way the AuthTrait
247		* works.
248		*
249		* @return bool
250		*/
251		public function viaRemember()
252		{
253		$user = false;
254
255		switch (config_item('api.auth_type'))
256		{
257		case 'basic':
258		$user = $this->tryBasicAuthentication();
259		break;
260		case 'digest':
261		$user = $this->tryDigestAuthentication();
262		break;
263		}
264
265		// If the user is throttled due to too many invalid logins
266		// or the system is under attack, kick them back.
267		// We need to test for this after validation because we
268		// don't want it to affect a valid login.
269
270		if ($this->email)
271		{
272		// If throttling time is above zero, we can't allow
273		// logins now.
274		if ($time = (int)$this->isThrottled($this->email) > 0)
275		{
276		$this->error = sprintf(lang('api.throttled'), $time);
277		return false;
278		}
279
280		$this->email = null;
281		}
282
283		if (! $user)
284		{
285		$this->user = null;
286		return $user;
287		}
288
289		$this->loginUser($user);
290
291		Events::trigger('didLogin', [$user]);
292
293		return true;
294		}
295
296		//--------------------------------------------------------------------
297
298		//--------------------------------------------------------------------
299		// Protected Methods
300		//--------------------------------------------------------------------
301
302		/**
303		* Checks the client's IP address against any IP addresses specified
304		* in the api config file. If any are found, the client is refused
305		* access immediately.
306		*/
307	View Code Duplication	public function checkIPBlacklist()
308		{
309		$blacklist = explode(',', config_item('api.ip_blacklist'));
310
311		array_walk($blacklist, function (&$item, $key) {
312		$item = trim($item);
313		});
314
315		if (in_array($this->ci->input->ip_address(), $blacklist))
316		{
317		throw new \Exception( lang('api.ip_denied'), 401);
318		}
319
320		return true;
321		}
322
323		//--------------------------------------------------------------------
324
325		/**
326		* Checks the client's IP address against any IP addresses specified
327		* in the api config file. If the client is not accessing the site
328		* from one of those addresses then their access is denied.
329		*/
330	View Code Duplication	public function checkIPWhitelist()
331		{
332		$whitelist = explode(',', config_item('api.ip_whitelist'));
333
334		array_push($whitelist, '127.0.0.1', '0.0.0.0');
335
336		array_walk($whitelist, function (&$item, $key) {
337		$item = trim($item);
338		});
339
340		if (! in_array($this->ci->input->ip_address(), $whitelist))
341		{
342		throw new \Exception( lang('api.ip_denied'), 401);
343		}
344
345		return true;
346		}
347
348		//--------------------------------------------------------------------
349
350		/**
351		* Handles the nitty gritty of actually logging our user into the system.
352		* Does NOT perform the authentication, just sets the system up so that
353		* it knows we're here.
354		*
355		* @param $user
356		*/
357		protected function loginUser($user)
358		{
359		// Save the user for later access
360		$this->user = $user;
361
362		// Clear our login attempts
363		$this->ci->login_model->purgeLoginAttempts($user['email']);
364
365		// We'll give a 20% chance to need to do a purge since we
366		// don't need to purge THAT often, it's just a maintenance issue.
367		// to keep the table from getting out of control.
368		if (mt_rand(1, 100) < 20)
369		{
370		$this->ci->login_model->purgeOldRememberTokens();
371		}
372		}
373
374		//--------------------------------------------------------------------
375
376		//--------------------------------------------------------------------
377		// UNUSED METHOD OVERRIDES
378		//--------------------------------------------------------------------
379
380		/**
381		* Attempt to log a user into the system.
382		*
383		* $credentials is an array of key/value pairs needed to log the user in.
384		* This is often email/password, or username/password.
385		*
386		* NOTE: Since this is intended for API use, it is a STATELESS implementation
387		* and does not support remember me functionality.
388		*
389		* Valid credentials:
390		* - username
391		* - email
392		* - realm
393		*
394		* @param $credentials
395		* @param bool $remember
396		*
397		* @return bool\|mixed\|void
398		*/
399		public function login($credentials, $remember=false)
400		{
401		throw new \BadMethodCallException( lang('api.unused_method') );
402		}
403
404		//--------------------------------------------------------------------
405
406		/**
407		* Logs a user out and removes all session information.
408		*
409		* NOTE: Since this is intended for API use, it is a STATELESS implementation
410		* and does not support remember me functionality.
411		*
412		* @return mixed
413		*/
414		public function logout()
415		{
416		throw new \BadMethodCallException( lang('api.unused_method') );
417		}
418
419		//--------------------------------------------------------------------
420
421		/**
422		* Checks whether a user is logged in or not.
423		*
424		* @return bool
425		*/
426		public function isLoggedIn()
427		{
428		return $this->logged_in;
429		}
430
431		//--------------------------------------------------------------------
432
433		}
434

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