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 11:54 UTC

LDAPAuthenticator::authenticate() D

↳ Parent: LDAPAuthenticator

Complexity

Conditions	15
Paths	36

Size

Total Lines	83
Code Lines	44

Duplication

Lines	4
Ratio	4.82 %

Importance

Changes

Metric	Value
dl	4
loc	83
rs	4.9121
c	0
b	0
f	0
cc	15
eloc	44
nc	36
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;
use Zend\Authentication\Result;

/**
 * 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)
    {
        $result = $result ?: ValidationResult::create();
        /** @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 (!$success) {
            /*
             * Try the fallback method if admin or it failed for anything other than invalid credentials
             * This is to avoid having an unhandled exception error thrown by PasswordEncryptor::create_for_algorithm()
             */
            if (Config::inst()->get(self::class, 'fallback_authenticator') === 'yes') {
                if (!in_array($serviceAuthenticationResult['code'], [Result::FAILURE_CREDENTIAL_INVALID])
                    || $username === 'admin'
                ) {
                    if ($fallbackMember = $this->fallbackAuthenticate($data, $request)) {
                        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, $data, false);


        $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)
    {
        // Set Email from Login
        if (array_key_exists('Login', $data) && !array_key_exists('Email', $data)) {
            $data['Email'] = $data['Login'];
        }
        $authenticatorClass = Config::inst()->get(self::class, 'fallback_authenticator_class');
        if ($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		use Zend\Authentication\Result;
18
19		/**
20		* Class LDAPAuthenticator
21		*
22		* Authenticate a user against LDAP, without the single sign-on component.
23		*
24		* See SAMLAuthenticator for further information.
25		*
26		* @package activedirectory
27		*/
28		class LDAPAuthenticator extends MemberAuthenticator
29		{
30		/**
31		* @var string
32		*/
33		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...
34
35		/**
36		* Set to 'yes' to indicate if this module should look up usernames in LDAP by matching the email addresses.
37		*
38		* CAVEAT #1: only set to 'yes' for systems that enforce email uniqueness.
39		* Otherwise only the first LDAP user with matching email will be accessible.
40		*
41		* CAVEAT #2: this is untested for systems that use LDAP with principal style usernames (i.e. [email protected]).
42		* The system will misunderstand emails for usernames with uncertain outcome.
43		*
44		* @var string 'no' or 'yes'
45		*/
46		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...
47
48		/**
49		* Set to 'yes' to fallback login attempts to {@link $fallback_authenticator}.
50		* This will occur if LDAP fails to authenticate the user.
51		*
52		* @var string 'no' or 'yes'
53		*/
54		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...
55
56		/**
57		* The class of {@link Authenticator} to use as the fallback authenticator.
58		*
59		* @var string
60		*/
61		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...
62
63		/**
64		* @return string
65		*/
66		public static function get_name()
67		{
68		return Config::inst()->get(self::class, 'name');
69		}
70
71		/**
72		* @param Controller $controller
73		* @return LDAPLoginForm
74		*/
75		public static function get_login_form(Controller $controller)
76		{
77		return LDAPLoginForm::create($controller, LDAPAuthenticator::class, 'LoginForm');
78		}
79
80		/**
81		* Performs the login, but will also create and sync the Member record on-the-fly, if not found.
82		*
83		* @param array $data
84		* @param HTTPRequest $request
85		* @param ValidationResult\|null $result
86		* @return null\|Member
87		*/
88		public function authenticate(array $data, HTTPRequest $request, ValidationResult &$result = null)
89		{
90		$result = $result ?: ValidationResult::create();
91		/** @var LDAPService $service */
92		$service = Injector::inst()->get(LDAPService::class);
93		$login = trim($data['Login']);
94		if (Email::is_valid_address($login)) {
95		if (Config::inst()->get(self::class, 'allow_email_login') != 'yes') {
96		$result->addError(
97		_t(
98		'LDAPAuthenticator.PLEASEUSEUSERNAME',
99		'Please enter your username instead of your email to log in.'
100		)
101		);
102		return null;
103		}
104		$username = $service->getUsernameByEmail($login);
105
106		// No user found with this email.
107		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...
108		if (Config::inst()->get(self::class, 'fallback_authenticator') === 'yes') {
109		if ($fallbackMember = $this->fallbackAuthenticate($data, $request)) {
110		{
111		return $fallbackMember;
112		}
113		}
114		}
115
116		$result->addError(_t('LDAPAuthenticator.INVALIDCREDENTIALS', 'Invalid credentials'));
117		return null;
118		}
119		} else {
120		$username = $login;
121		}
122
123		$serviceAuthenticationResult = $service->authenticate($username, $data['Password']);
124		$success = $serviceAuthenticationResult['success'] === true;
125
126		if (!$success) {
127		/*
128		* Try the fallback method if admin or it failed for anything other than invalid credentials
129		* This is to avoid having an unhandled exception error thrown by PasswordEncryptor::create_for_algorithm()
130		*/
131		if (Config::inst()->get(self::class, 'fallback_authenticator') === 'yes') {
132		if (!in_array($serviceAuthenticationResult['code'], [Result::FAILURE_CREDENTIAL_INVALID])
133		\|\| $username === 'admin'
134		) {
135		if ($fallbackMember = $this->fallbackAuthenticate($data, $request)) {
136		return $fallbackMember;
137		}
138		}
139		}
140
141		$result->addError($serviceAuthenticationResult['message']);
142
143		return null;
144		}
145		$data = $service->getUserByUsername($serviceAuthenticationResult['identity']);
146		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...
147		$result->addError(
148		_t(
149		'LDAPAuthenticator.PROBLEMFINDINGDATA',
150		'There was a problem retrieving your user data'
151		)
152		);
153		return null;
154		}
155
156		// LDAPMemberExtension::memberLoggedIn() will update any other AD attributes mapped to Member fields
157		$member = Member::get()->filter('GUID', $data['objectguid'])->limit(1)->first();
158	View Code Duplication	if (!($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...
159		$member = new Member();
160		$member->GUID = $data['objectguid'];
161		}
162
163		// Update the users from LDAP so we are sure that the email is correct.
164		// This will also write the Member record.
165		$service->updateMemberFromLDAP($member, $data, false);
		0 ignored issues – show Compatibility introduced 2017-09-03 11:56 UTC by Report Bug Copy Issue Report `$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...
166
167		$request->getSession()->clear('BackURL');
168
169		return $member;
170		}
171
172		/**
173		* Try to authenticate using the fallback authenticator.
174		*
175		* @param array $data
176		* @param HTTPRequest $request
177		* @return null\|Member
178		*/
179		protected function fallbackAuthenticate($data, HTTPRequest $request)
180		{
181		// Set Email from Login
182		if (array_key_exists('Login', $data) && !array_key_exists('Email', $data)) {
183		$data['Email'] = $data['Login'];
184		}
185		$authenticatorClass = Config::inst()->get(self::class, 'fallback_authenticator_class');
186		if ($authenticator = Injector::inst()->get($authenticatorClass)) {
187		$result = call_user_func(
188		[
189		$authenticator,
190		'authenticate'
191		],
192		$data,
193		$request
194		);
195		return $result;
196		}
197		}
198
199		public function getLoginHandler($link)
200		{
201		return LDAPLoginHandler::create($link, $this);
202		}
203
204		public function supportedServices()
205		{
206		$result = Authenticator::LOGIN \| Authenticator::LOGOUT \| Authenticator::RESET_PASSWORD;
207
208		if ((bool)LDAPService::config()->get('allow_password_change')) {
209		$result \|= Authenticator::CHANGE_PASSWORD;
210		}
211		return $result;
212		}
213
214		public function getLostPasswordHandler($link)
215		{
216		return LDAPLostPasswordHandler::create($link, $this);
217		}
218		}
219

silverstripe / silverstripe-activedirectory

Pull Request — master (#116)

LDAPAuthenticator::authenticate() D

Complexity

Size

Duplication

Importance

How to fix Long Method Complexity

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