LDAPAuthenticator::authenticate() - Code Metrics - Inspection of "SS4 security changes and unit test fixes" - silverstripe/silverstripe-activedirectory - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#116)

by Franco

created 2017-09-03 01:40 UTC

LDAPAuthenticator::authenticate() C

↳ Parent: LDAPAuthenticator

Complexity

Conditions	13
Paths	32

Size

Total Lines	78
Code Lines	44

Duplication

Lines	28
Ratio	35.9 %

Importance

Changes

Metric	Value
dl	28
loc	78
rs	5.1663
c	0
b	0
f	0
cc	13
eloc	44
nc	32
nop	3

How to fix Long Method Complexity

<?php

namespace SilverStripe\ActiveDirectory\Authenticators;

use SilverStripe\ActiveDirectory\Services\LDAPService;
use SilverStripe\Control\Controller;
use SilverStripe\Control\Email\Email;
use SilverStripe\Control\HTTPRequest;
use SilverStripe\Control\Session;
use SilverStripe\Core\Config\Config;
use SilverStripe\Core\Injector\Injector;
use SilverStripe\ORM\ValidationResult;
use SilverStripe\Security\Authenticator;
use SilverStripe\Security\Member;
use SilverStripe\Security\MemberAuthenticator\LogoutHandler;
use SilverStripe\Security\MemberAuthenticator\MemberAuthenticator;

/**
 * Class LDAPAuthenticator
 *
 * Authenticate a user against LDAP, without the single sign-on component.
 *
 * See SAMLAuthenticator for further information.
 *
 * @package activedirectory
 */
class LDAPAuthenticator extends MemberAuthenticator
{
    /**
     * @var string
     */
    private $name = 'LDAP';


    /**
     * Set to 'yes' to indicate if this module should look up usernames in LDAP by matching the email addresses.
     *
     * CAVEAT #1: only set to 'yes' for systems that enforce email uniqueness.
     * Otherwise only the first LDAP user with matching email will be accessible.
     *
     * CAVEAT #2: this is untested for systems that use LDAP with principal style usernames (i.e. [email protected]).
     * The system will misunderstand emails for usernames with uncertain outcome.
     *
     * @var string 'no' or 'yes'
     */
    private static $allow_email_login = 'no';


    /**
     * Set to 'yes' to fallback login attempts to {@link $fallback_authenticator}.
     * This will occur if LDAP fails to authenticate the user.
     *
     * @var string 'no' or 'yes'
     */
    private static $fallback_authenticator = 'no';


    /**
     * The class of {@link Authenticator} to use as the fallback authenticator.
     *
     * @var string
     */
    private static $fallback_authenticator_class = MemberAuthenticator::class;


    /**
     * @return string
     */
    public static function get_name()
    {
        return Config::inst()->get(self::class, 'name');
    }

    /**
     * @param Controller $controller
     * @return LDAPLoginForm
     */
    public static function get_login_form(Controller $controller)
    {
        return LDAPLoginForm::create($controller, LDAPAuthenticator::class, 'LoginForm');
    }

    /**
     * Performs the login, but will also create and sync the Member record on-the-fly, if not found.
     *
     * @param array $data
     * @param HTTPRequest $request
     * @param ValidationResult|null $result
     * @return null|Member
     */
    public function authenticate(array $data, HTTPRequest $request, ValidationResult &$result = null)
    {
        if (is_null($result)) {
            $result = new ValidationResult();
        }
        /** @var LDAPService $service */
        $service = Injector::inst()->get(LDAPService::class);
        $login = trim($data['Login']);
        if (Email::is_valid_address($login)) {
            if (Config::inst()->get(self::class, 'allow_email_login') != 'yes') {
                $result->addError(
                    _t(
                        'LDAPAuthenticator.PLEASEUSEUSERNAME',
                        'Please enter your username instead of your email to log in.'
                    )
                );
                return null;
            }

            $username = $service->getUsernameByEmail($login);

            // No user found with this email.
            if (!$username) {
''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
                if (Config::inst()->get(self::class, 'fallback_authenticator') === 'yes') {
                    if ($fallbackMember = $this->fallbackAuthenticate($data, $request)) {
                        {
                            return $fallbackMember;
                        }
                    }
                }

                $result->addError(_t('LDAPAuthenticator.INVALIDCREDENTIALS', 'Invalid credentials'));
                return null;
            }
        } else {
            $username = $login;
        }
        $serviceAuthenticationResult = $service->authenticate($username, $data['Password']);
        $success = $serviceAuthenticationResult['success'] === true;
        if (!$success) {

            if (Config::inst()->get(self::class, 'fallback_authenticator') === 'yes') {
                $fallbackMember = $this->fallbackAuthenticate($data, $request);
                if ($fallbackMember) {
                    return $fallbackMember;
                }
            }

            $result->addError($serviceAuthenticationResult['message']);

            return null;
        }

        $data = $service->getUserByUsername($serviceAuthenticationResult['identity']);
        if (!$data) {

            $result->addError(
                _t(
                    'LDAPAuthenticator.PROBLEMFINDINGDATA',
                    'There was a problem retrieving your user data'
                )
            );
            return null;
        }

        // LDAPMemberExtension::memberLoggedIn() will update any other AD attributes mapped to Member fields
        $member = Member::get()->filter('GUID', $data['objectguid'])->limit(1)->first();
        if (!($member && $member->exists())) {

            $member = new Member();
            $member->GUID = $data['objectguid'];
        }

        // Update the users from LDAP so we are sure that the email is correct.
        // This will also write the Member record.
        $service->updateMemberFromLDAP($member);


        $request->getSession()->clear('BackURL');

        return $member;
    }

    /**
     * Try to authenticate using the fallback authenticator.
     *
     * @param array $data
     * @param HTTPRequest $request
     * @return null|Member
     */
    protected function fallbackAuthenticate($data, HTTPRequest $request)
    {
        $authenticatorClass = Config::inst()->get(self::class, 'fallback_authenticator_class');
        if ($authenticator = Injector::inst()->get($authenticatorClass)) {
            $result = call_user_func(
                [
                    $authenticator,
                    'authenticate'
                ],
                $data,
                $request
            );
            return $result;
        }
    }

    public function getLoginHandler($link)
    {
        return LDAPLoginHandler::create($link, $this);
    }

    public function supportedServices()
    {
        $result = Authenticator::LOGIN | Authenticator::LOGOUT | Authenticator::RESET_PASSWORD;

        if ((bool)LDAPService::config()->get('allow_password_change')) {
            $result |= Authenticator::CHANGE_PASSWORD;
        }
        return $result;
    }

    public function getLostPasswordHandler($link)
    {
        return LDAPLostPasswordHandler::create($link, $this);
    }
}


1		<?php
2
3		namespace SilverStripe\ActiveDirectory\Authenticators;
4
5		use SilverStripe\ActiveDirectory\Services\LDAPService;
6		use SilverStripe\Control\Controller;
7		use SilverStripe\Control\Email\Email;
8		use SilverStripe\Control\HTTPRequest;
9		use SilverStripe\Control\Session;
10		use SilverStripe\Core\Config\Config;
11		use SilverStripe\Core\Injector\Injector;
12		use SilverStripe\ORM\ValidationResult;
13		use SilverStripe\Security\Authenticator;
14		use SilverStripe\Security\Member;
15		use SilverStripe\Security\MemberAuthenticator\LogoutHandler;
16		use SilverStripe\Security\MemberAuthenticator\MemberAuthenticator;
17
18		/**
19		* Class LDAPAuthenticator
20		*
21		* Authenticate a user against LDAP, without the single sign-on component.
22		*
23		* See SAMLAuthenticator for further information.
24		*
25		* @package activedirectory
26		*/
27		class LDAPAuthenticator extends MemberAuthenticator
28		{
29		/**
30		* @var string
31		*/
32		private $name = 'LDAP';
		0 ignored issues – show Unused Code introduced 2016-03-22 20:04 UTC by Report Bug Copy Issue Report The property `$name` is not used and could be removed. This check marks private properties in classes that are never used. Those properties can be removed. Loading history...
33
34		/**
35		* Set to 'yes' to indicate if this module should look up usernames in LDAP by matching the email addresses.
36		*
37		* CAVEAT #1: only set to 'yes' for systems that enforce email uniqueness.
38		* Otherwise only the first LDAP user with matching email will be accessible.
39		*
40		* CAVEAT #2: this is untested for systems that use LDAP with principal style usernames (i.e. [email protected]).
41		* The system will misunderstand emails for usernames with uncertain outcome.
42		*
43		* @var string 'no' or 'yes'
44		*/
45		private static $allow_email_login = 'no';
		0 ignored issues – show Unused Code introduced 2016-03-22 20:04 UTC by Report Bug Copy Issue Report The property `$allow_email_login` is not used and could be removed. This check marks private properties in classes that are never used. Those properties can be removed. Loading history...
46
47		/**
48		* Set to 'yes' to fallback login attempts to {@link $fallback_authenticator}.
49		* This will occur if LDAP fails to authenticate the user.
50		*
51		* @var string 'no' or 'yes'
52		*/
53		private static $fallback_authenticator = 'no';
		0 ignored issues – show Unused Code introduced 2017-01-16 21:03 UTC by Report Bug Copy Issue Report The property `$fallback_authenticator` is not used and could be removed. This check marks private properties in classes that are never used. Those properties can be removed. Loading history...
54
55		/**
56		* The class of {@link Authenticator} to use as the fallback authenticator.
57		*
58		* @var string
59		*/
60		private static $fallback_authenticator_class = MemberAuthenticator::class;
		0 ignored issues – show Unused Code introduced 2017-04-11 01:05 UTC by Report Bug Copy Issue Report The property `$fallback_authenticator_class` is not used and could be removed. This check marks private properties in classes that are never used. Those properties can be removed. Loading history...
61
62		/**
63		* @return string
64		*/
65		public static function get_name()
66		{
67		return Config::inst()->get(self::class, 'name');
68		}
69
70		/**
71		* @param Controller $controller
72		* @return LDAPLoginForm
73		*/
74		public static function get_login_form(Controller $controller)
75		{
76		return LDAPLoginForm::create($controller, LDAPAuthenticator::class, 'LoginForm');
77		}
78
79		/**
80		* Performs the login, but will also create and sync the Member record on-the-fly, if not found.
81		*
82		* @param array $data
83		* @param HTTPRequest $request
84		* @param ValidationResult\|null $result
85		* @return null\|Member
86		*/
87		public function authenticate(array $data, HTTPRequest $request, ValidationResult &$result = null)
88		{
89		if (is_null($result)) {
90		$result = new ValidationResult();
91		}
92		/** @var LDAPService $service */
93		$service = Injector::inst()->get(LDAPService::class);
94		$login = trim($data['Login']);
95		if (Email::is_valid_address($login)) {
96		if (Config::inst()->get(self::class, 'allow_email_login') != 'yes') {
97		$result->addError(
98		_t(
99		'LDAPAuthenticator.PLEASEUSEUSERNAME',
100		'Please enter your username instead of your email to log in.'
101		)
102		);
103		return null;
104		}
105
106		$username = $service->getUsernameByEmail($login);
107
108		// No user found with this email.
109	View Code Duplication	if (!$username) {
		0 ignored issues – show Bug Best Practice introduced 2017-08-30 05:56 UTC by Report Bug Copy Issue Report The expression `$username` of type `null\|string` is loosely compared to `false`; this is ambiguous if the string can be empty. You might want to explicitly use `=== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `string` values, the empty string `''` is a special case, in particular the following results might be unexpected: '' == false // true '' == null // true 'ab' == false // false 'ab' == null // false // It is often better to use strict comparison '' === false // false '' === null // false Loading history... Duplication introduced 2017-01-16 21:03 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...
110		if (Config::inst()->get(self::class, 'fallback_authenticator') === 'yes') {
111		if ($fallbackMember = $this->fallbackAuthenticate($data, $request)) {
112		{
113		return $fallbackMember;
114		}
115		}
116		}
117
118		$result->addError(_t('LDAPAuthenticator.INVALIDCREDENTIALS', 'Invalid credentials'));
119		return null;
120		}
121		} else {
122		$username = $login;
123		}
124		$serviceAuthenticationResult = $service->authenticate($username, $data['Password']);
125		$success = $serviceAuthenticationResult['success'] === true;
126	View Code Duplication	if (!$success) {
		0 ignored issues – show Duplication introduced 2017-01-16 21:03 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...
127		if (Config::inst()->get(self::class, 'fallback_authenticator') === 'yes') {
128		$fallbackMember = $this->fallbackAuthenticate($data, $request);
129		if ($fallbackMember) {
130		return $fallbackMember;
131		}
132		}
133
134		$result->addError($serviceAuthenticationResult['message']);
135
136		return null;
137		}
138
139		$data = $service->getUserByUsername($serviceAuthenticationResult['identity']);
140		if (!$data) {
		0 ignored issues – show Bug Best Practice introduced 2017-08-30 05:56 UTC by Report Bug Copy Issue Report The expression `$data` of type `array` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
141		$result->addError(
142		_t(
143		'LDAPAuthenticator.PROBLEMFINDINGDATA',
144		'There was a problem retrieving your user data'
145		)
146		);
147		return null;
148		}
149
150		// LDAPMemberExtension::memberLoggedIn() will update any other AD attributes mapped to Member fields
151		$member = Member::get()->filter('GUID', $data['objectguid'])->limit(1)->first();
152	View Code Duplication	if (!($member && $member->exists())) {
		0 ignored issues – show Duplication introduced 2016-03-22 20:04 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...
153		$member = new Member();
154		$member->GUID = $data['objectguid'];
155		}
156
157		// Update the users from LDAP so we are sure that the email is correct.
158		// This will also write the Member record.
159		$service->updateMemberFromLDAP($member);
		0 ignored issues – show Compatibility introduced 2017-08-30 05:56 UTC by Report Bug Copy Issue Report `$member` of type `object<SilverStripe\ORM\DataObject>` is not a sub-type of `object<SilverStripe\Security\Member>`. It seems like you assume a child class of the class `SilverStripe\ORM\DataObject` to be always present. This check looks for parameters that are defined as one type in their type hint or doc comment but seem to be used as a narrower type, i.e an implementation of an interface or a subclass. Consider changing the type of the parameter or doing an instanceof check before assuming your parameter is of the expected type. Loading history...
160
161		$request->getSession()->clear('BackURL');
162
163		return $member;
164		}
165
166		/**
167		* Try to authenticate using the fallback authenticator.
168		*
169		* @param array $data
170		* @param HTTPRequest $request
171		* @return null\|Member
172		*/
173		protected function fallbackAuthenticate($data, HTTPRequest $request)
174		{
175		$authenticatorClass = Config::inst()->get(self::class, 'fallback_authenticator_class');
176		if ($authenticator = Injector::inst()->get($authenticatorClass)) {
177		$result = call_user_func(
178		[
179		$authenticator,
180		'authenticate'
181		],
182		$data,
183		$request
184		);
185		return $result;
186		}
187		}
188
189		public function getLoginHandler($link)
190		{
191		return LDAPLoginHandler::create($link, $this);
192		}
193
194		public function supportedServices()
195		{
196		$result = Authenticator::LOGIN \| Authenticator::LOGOUT \| Authenticator::RESET_PASSWORD;
197
198		if ((bool)LDAPService::config()->get('allow_password_change')) {
199		$result \|= Authenticator::CHANGE_PASSWORD;
200		}
201		return $result;
202		}
203
204		public function getLostPasswordHandler($link)
205		{
206		return LDAPLostPasswordHandler::create($link, $this);
207		}
208		}
209

silverstripe / silverstripe-activedirectory

Pull Request — master (#116)

LDAPAuthenticator::authenticate() C

Complexity

Size

Duplication

Importance

How to fix Long Method Complexity

Long Method

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