PasswordVerify::extractAttributes() - Code Metrics - Inspection of "A new PasswordVerify.php that does hashing in php..." - simplesamlphp/simplesamlphp-module-sqlauth - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#6)

by Tim

created 2023-11-02 20:52 UTC

PasswordVerify::extractAttributes() B

↳ Parent: PasswordVerify

Complexity

Conditions	7
Paths	8

Size

Total Lines	28
Code Lines	14

Duplication

Lines	0
Ratio	0 %

Importance

Changes	2
Bugs	0	Features	0

Metric	Value
cc	7
eloc	14
c	2
b	0
f	0
nc	8
nop	2
dl	0
loc	28
rs	8.8333

<?php

declare(strict_types=1);

namespace SimpleSAML\Module\sqlauth\Auth\Source;

use Exception;
use PDO;
use PDOException;
use SimpleSAML\Assert\Assert;
use SimpleSAML\Error;
use SimpleSAML\Logger;
use SimpleSAML\Module\sqlauth\Auth\Source\SQL;

use function array_key_exists;
use function array_keys;
use function count;
use function implode;
use function in_array;
use function is_null;
use function password_verify;
use function sprintf;
use function strval;

/**
 * Simple SQL authentication source
 *
 * This class is very much like the SQL class. The major difference is that
 * instead of using SHA2 and other functions in the database we use the PHP
 * password_verify() function to allow for example PASSWORD_ARGON2ID to be used
 * for verification.
 *
 * While this class has a query parameter as the SQL class does the meaning
 * is different. The query for this class should return at least a column
 * called passwordhash containing the hashed password which was generated
 * for example using
 *    password_hash('hello', PASSWORD_ARGON2ID );
 *
 * Auth only passes if the PHP code below returns true.
 *   password_verify($password, row['passwordhash'] );
 *
 * Unlike the SQL class the username is the only parameter passed to the SQL query,
 * the query can not perform password checks, they are performed by the PHP code
 * in this class using password_verify().
 *
 * If there are other columns in the returned data they are assumed to be attributes
 * you would like to be returned through SAML.
 *
 * @package SimpleSAMLphp
 */

class PasswordVerify extends SQL
{
    /**
     * The column in the result set containing the passwordhash.
     */
    protected string $passwordhashcolumn = 'passwordhash';

    /**
     * Constructor for this authentication source.
     *
     * @param array $info  Information about this authentication source.
     * @param array $config  Configuration.
     */
    public function __construct(array $info, array $config)
    {
        // Call the parent constructor first, as required by the interface
        parent::__construct($info, $config);

        if (array_key_exists('passwordhashcolumn', $config)) {
            $this->passwordhashcolumn = $config['passwordhashcolumn'];
        }
    }


    /**
     * Extract SQL columns into SAML attribute array
     *
     * @param array  $data  Associative array from database in the format of PDO fetchAll
     * @param array  $forbiddenAttributes An array of attributes to never return
     * @return array  Associative array with the users attributes.
     */
    protected function extractAttributes(array $data, array $forbiddenAttributes = []): array
    {
        $attributes = [];
        foreach ($data as $row) {
            foreach ($row as $name => $value) {
                if ($value === null) {
                    continue;
                }
                if (in_array($name, $forbiddenAttributes)) {
                    continue;
                }

                $value = strval($value);

                if (!array_key_exists($name, $attributes)) {
                    $attributes[$name] = [];
                }

                if (in_array($value, $attributes[$name], true)) {
                    // Value already exists in attribute
                    continue;
                }

                $attributes[$name][] = $value;
            }
        }

        return $attributes;
    }


    /**
     * Attempt to log in using the given username and password.
     *
     * On a successful login, this function should return the users attributes. On failure,
     * it should throw an exception. If the error was caused by the user entering the wrong
     * username or password, a \SimpleSAML\Error\Error('WRONGUSERPASS') should be thrown.
     *
     * Note that both the username and the password are UTF-8 encoded.
     *
     * @param string $username  The username the user wrote.
     * @param string $password  The password the user wrote.
     * @return array  Associative array with the users attributes.
     */
    protected function login(string $username, string $password): array
    {
        $db = $this->connect();

        try {
            $sth = $db->prepare($this->query);
        } catch (PDOException $e) {
            throw new Exception(sprintf(
                'sqlauth:%s: - Failed to prepare query: %s',
                $this->authId,
                $e->getMessage(),
            ));
        }


        try {
            $sth->execute(['username' => $username]);
        } catch (PDOException $e) {
            throw new Exception(sprintf(
                'sqlauth:%s: - Failed to execute sql: %s query: %s',
                $this->authId,
                $this->query,
                $e->getMessage(),
            ));
        }

        try {
            $data = $sth->fetchAll(PDO::FETCH_ASSOC);
        } catch (PDOException $e) {
            throw new Exception(sprintf(
                'sqlauth:%s: - Failed to fetch result set: %s',
                $this->authId,
                $e->getMessage(),
            ));
        }

        Logger::info(sprintf(
            'sqlauth:%s : Got %d rows from database',
            $this->authId,
            count($data),
        ));

        if (count($data) === 0) {
            // No rows returned - invalid username/password
            Logger::error(sprintf(
                'sqlauth:%s: No rows in result set. Probably wrong username/password.',
                $this->authId,
            ));
            throw new Error\Error('WRONGUSERPASS');
        }

        /**
         * Sanity check, passwordhash must be in each resulting tuple and must have
         * the same value in every tuple.
         *
         * Note that $pwhash will contain the passwordhash value after this loop.
         */
        $pwhash = null;
        foreach ($data as $row) {
            if (
                !array_key_exists($this->passwordhashcolumn, $row)
                || is_null($row[$this->passwordhashcolumn])
            ) {
                Logger::error(sprintf(
                    'sqlauth:%s: column %s must be in every result tuple.',
                    $this->authId,
                    $this->passwordhashcolumn,
                ));
                throw new Error\Error('WRONGUSERPASS');
            }
            if ($pwhash) {
                if ($pwhash !== $row[$this->passwordhashcolumn]) {
                    Logger::error(sprintf(
                        'sqlauth:%s: column %s must be THE SAME in every result tuple.',
                        $this->authId,
                        $this->passwordhashcolumn,
                    ));
                    throw new Error\Error('WRONGUSERPASS');
                }
            }
            $pwhash = $row[$this->passwordhashcolumn];
        }
        /**
         * This should never happen as the count(data) test above would have already thrown.
         * But checking twice doesn't hurt.
         */
        if (is_null($pwhash)) {
            if ($pwhash !== $row[$this->passwordhashcolumn]) {

                Logger::error(sprintf(
                    'sqlauth:%s: column %s does not contain a password hash.',
                    $this->authId,
                    $this->passwordhashcolumn,
                ));
                throw new Error\Error('WRONGUSERPASS');
            }
        }

        /**
         * VERIFICATION!
         * Now to check if the password the user supplied is actually valid
         */
        if (!password_verify($password, $pwhash)) {
            Logger::error(sprintf('sqlauth:%s: password is incorrect.', $this->authId));
            throw new Error\Error('WRONGUSERPASS');
        }

        $attributes = $this->extractAttributes($data, [$this->passwordhashcolumn]);

        Logger::info(sprintf(
            'sqlauth:%s: Attributes: %s',
            $this->authId,
            implode(',', array_keys($attributes)),
        ));

        return $attributes;
    }
}


1			<?php
2
3			declare(strict_types=1);
4
5			namespace SimpleSAML\Module\sqlauth\Auth\Source;
6
7			use Exception;
8			use PDO;
9			use PDOException;
10			use SimpleSAML\Assert\Assert;
11			use SimpleSAML\Error;
12			use SimpleSAML\Logger;
13			use SimpleSAML\Module\sqlauth\Auth\Source\SQL;
14
15			use function array_key_exists;
16			use function array_keys;
17			use function count;
18			use function implode;
19			use function in_array;
20			use function is_null;
21			use function password_verify;
22			use function sprintf;
23			use function strval;
24
25			/**
26			* Simple SQL authentication source
27			*
28			* This class is very much like the SQL class. The major difference is that
29			* instead of using SHA2 and other functions in the database we use the PHP
30			* password_verify() function to allow for example PASSWORD_ARGON2ID to be used
31			* for verification.
32			*
33			* While this class has a query parameter as the SQL class does the meaning
34			* is different. The query for this class should return at least a column
35			* called passwordhash containing the hashed password which was generated
36			* for example using
37			* password_hash('hello', PASSWORD_ARGON2ID );
38			*
39			* Auth only passes if the PHP code below returns true.
40			* password_verify($password, row['passwordhash'] );
41			*
42			* Unlike the SQL class the username is the only parameter passed to the SQL query,
43			* the query can not perform password checks, they are performed by the PHP code
44			* in this class using password_verify().
45			*
46			* If there are other columns in the returned data they are assumed to be attributes
47			* you would like to be returned through SAML.
48			*
49			* @package SimpleSAMLphp
50			*/
51
52			class PasswordVerify extends SQL
53			{
54			/**
55			* The column in the result set containing the passwordhash.
56			*/
57			protected string $passwordhashcolumn = 'passwordhash';
58
59			/**
60			* Constructor for this authentication source.
61			*
62			* @param array $info Information about this authentication source.
63			* @param array $config Configuration.
64			*/
65			public function __construct(array $info, array $config)
66			{
67			// Call the parent constructor first, as required by the interface
68			parent::__construct($info, $config);
69
70			if (array_key_exists('passwordhashcolumn', $config)) {
71			$this->passwordhashcolumn = $config['passwordhashcolumn'];
72			}
73			}
74
75
76			/**
77			* Extract SQL columns into SAML attribute array
78			*
79			* @param array $data Associative array from database in the format of PDO fetchAll
80			* @param array $forbiddenAttributes An array of attributes to never return
81			* @return array Associative array with the users attributes.
82			*/
83			protected function extractAttributes(array $data, array $forbiddenAttributes = []): array
84			{
85			$attributes = [];
86			foreach ($data as $row) {
87			foreach ($row as $name => $value) {
88			if ($value === null) {
89			continue;
90			}
91			if (in_array($name, $forbiddenAttributes)) {
92			continue;
93			}
94
95			$value = strval($value);
96
97			if (!array_key_exists($name, $attributes)) {
98			$attributes[$name] = [];
99			}
100
101			if (in_array($value, $attributes[$name], true)) {
102			// Value already exists in attribute
103			continue;
104			}
105
106			$attributes[$name][] = $value;
107			}
108			}
109
110			return $attributes;
111			}
112
113
114			/**
115			* Attempt to log in using the given username and password.
116			*
117			* On a successful login, this function should return the users attributes. On failure,
118			* it should throw an exception. If the error was caused by the user entering the wrong
119			* username or password, a \SimpleSAML\Error\Error('WRONGUSERPASS') should be thrown.
120			*
121			* Note that both the username and the password are UTF-8 encoded.
122			*
123			* @param string $username The username the user wrote.
124			* @param string $password The password the user wrote.
125			* @return array Associative array with the users attributes.
126			*/
127			protected function login(string $username, string $password): array
128			{
129			$db = $this->connect();
130
131			try {
132			$sth = $db->prepare($this->query);
133			} catch (PDOException $e) {
134			throw new Exception(sprintf(
135			'sqlauth:%s: - Failed to prepare query: %s',
136			$this->authId,
137			$e->getMessage(),
138			));
139			}
140
141
142			try {
143			$sth->execute(['username' => $username]);
144			} catch (PDOException $e) {
145			throw new Exception(sprintf(
146			'sqlauth:%s: - Failed to execute sql: %s query: %s',
147			$this->authId,
148			$this->query,
149			$e->getMessage(),
150			));
151			}
152
153			try {
154			$data = $sth->fetchAll(PDO::FETCH_ASSOC);
155			} catch (PDOException $e) {
156			throw new Exception(sprintf(
157			'sqlauth:%s: - Failed to fetch result set: %s',
158			$this->authId,
159			$e->getMessage(),
160			));
161			}
162
163			Logger::info(sprintf(
164			'sqlauth:%s : Got %d rows from database',
165			$this->authId,
166			count($data),
167			));
168
169			if (count($data) === 0) {
170			// No rows returned - invalid username/password
171			Logger::error(sprintf(
172			'sqlauth:%s: No rows in result set. Probably wrong username/password.',
173			$this->authId,
174			));
175			throw new Error\Error('WRONGUSERPASS');
176			}
177
178			/**
179			* Sanity check, passwordhash must be in each resulting tuple and must have
180			* the same value in every tuple.
181			*
182			* Note that $pwhash will contain the passwordhash value after this loop.
183			*/
184			$pwhash = null;
185			foreach ($data as $row) {
186			if (
187			!array_key_exists($this->passwordhashcolumn, $row)
188			\|\| is_null($row[$this->passwordhashcolumn])
189			) {
190			Logger::error(sprintf(
191			'sqlauth:%s: column %s must be in every result tuple.',
192			$this->authId,
193			$this->passwordhashcolumn,
194			));
195			throw new Error\Error('WRONGUSERPASS');
196			}
197			if ($pwhash) {
198			if ($pwhash !== $row[$this->passwordhashcolumn]) {
199			Logger::error(sprintf(
200			'sqlauth:%s: column %s must be THE SAME in every result tuple.',
201			$this->authId,
202			$this->passwordhashcolumn,
203			));
204			throw new Error\Error('WRONGUSERPASS');
205			}
206			}
207			$pwhash = $row[$this->passwordhashcolumn];
208			}
209			/**
210			* This should never happen as the count(data) test above would have already thrown.
211			* But checking twice doesn't hurt.
212			*/
213			if (is_null($pwhash)) {
214			if ($pwhash !== $row[$this->passwordhashcolumn]) {
			0 ignored issues – show Comprehensibility Best Practice introduced 2023-06-28 23:47 UTC by Report Bug Copy Issue Report The variable `$row` seems to be defined by a `foreach` iteration on line `185`. Are you sure the iterator is never empty, otherwise this variable is not defined? Loading history...
215			Logger::error(sprintf(
216			'sqlauth:%s: column %s does not contain a password hash.',
217			$this->authId,
218			$this->passwordhashcolumn,
219			));
220			throw new Error\Error('WRONGUSERPASS');
221			}
222			}
223
224			/**
225			* VERIFICATION!
226			* Now to check if the password the user supplied is actually valid
227			*/
228			if (!password_verify($password, $pwhash)) {
229			Logger::error(sprintf('sqlauth:%s: password is incorrect.', $this->authId));
230			throw new Error\Error('WRONGUSERPASS');
231			}
232
233			$attributes = $this->extractAttributes($data, [$this->passwordhashcolumn]);
234
235			Logger::info(sprintf(
236			'sqlauth:%s: Attributes: %s',
237			$this->authId,
238			implode(',', array_keys($attributes)),
239			));
240
241			return $attributes;
242			}
243			}
244

simplesamlphp / simplesamlphp-module-sqlauth

Pull Request — master (#6)

PasswordVerify::extractAttributes() B

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