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<?php |
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declare(strict_types=1); |
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namespace SimpleSAML\Module\sqlauth\Auth\Source; |
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use SimpleSAML\Logger; |
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use SimpleSAML\Module\sqlauth\Auth\Source\SQL; |
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use function array_key_exists; |
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use function array_keys; |
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use function count; |
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use function implode; |
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use function is_null; |
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use function password_verify; |
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/** |
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* Simple SQL authentication source |
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* |
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* This class is very much like the SQL class. The major difference is that |
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* instead of using SHA2 and other functions in the database we use the PHP |
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* password_verify() function to allow for example PASSWORD_ARGON2ID to be used |
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* for verification. |
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* |
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* While this class has a query parameter as the SQL class does the meaning |
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* is different. The query for this class should return at least a column |
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* called passwordhash containing the hashed password which was generated |
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* for example using |
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* password_hash('hello', PASSWORD_ARGON2ID ); |
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* |
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* Auth only passes if the PHP code below returns true. |
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* password_verify($password, row['passwordhash'] ); |
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* |
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* Unlike the SQL class the username is the only parameter passed to the SQL query, |
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* the query can not perform password checks, they are performed by the PHP code |
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* in this class using password_verify(). |
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* |
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* If there are other columns in the returned data they are assumed to be attributes |
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* you would like to be returned through SAML. |
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* |
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* @package SimpleSAMLphp |
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*/ |
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class PasswordVerify extends SQL |
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{ |
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/** |
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* The column in the result set containing the passwordhash. |
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*/ |
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protected string $passwordhashcolumn = 'passwordhash'; |
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/** |
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* Constructor for this authentication source. |
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* |
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* @param array $info Information about this authentication source. |
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* @param array $config Configuration. |
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*/ |
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public function __construct(array $info, array $config) |
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{ |
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// Call the parent constructor first, as required by the interface |
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parent::__construct($info, $config); |
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if (array_key_exists('passwordhashcolumn', $config)) { |
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$this->passwordhashcolumn = $config['passwordhashcolumn']; |
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} |
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} |
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/** |
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* Attempt to log in using the given username and password. |
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* |
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* On a successful login, this function should return the users attributes. On failure, |
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* it should throw an exception. If the error was caused by the user entering the wrong |
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* username or password, a \SimpleSAML\Error\Error('WRONGUSERPASS') should be thrown. |
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* |
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* Note that both the username and the password are UTF-8 encoded. |
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* |
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* @param string $username The username the user wrote. |
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* @param string $password The password the user wrote. |
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* @return array Associative array with the users attributes. |
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*/ |
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protected function login(string $username, string $password): array |
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{ |
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$this->verifyUserNameWithRegex($username); |
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$db = $this->connect(); |
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$params = ['username' => $username]; |
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$attributes = []; |
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$numQueries = count($this->query); |
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for ($x = 0; $x < $numQueries; $x++) { |
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$data = $this->executeQuery($db, $this->query[$x], $params); |
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Logger::info('sqlauth:' . $this->authId . ': Got ' . count($data) . |
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' rows from database'); |
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if ($x === 0) { |
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if (count($data) === 0) { |
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// No rows returned - invalid username/password |
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Logger::error('sqlauth:' . $this->authId . |
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': No rows in result set. Probably wrong username/password.'); |
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throw new \SimpleSAML\Error\Error('WRONGUSERPASS'); |
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} |
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} |
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/** |
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* Sanity check, passwordhash must be in each resulting tuple and must have |
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* the same value in every tuple. |
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* |
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* Note that $pwhash will contain the passwordhash value after this loop. |
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*/ |
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$pwhash = null; |
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foreach ($data as $row) { |
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if ( |
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!array_key_exists($this->passwordhashcolumn, $row) |
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|| is_null($row[$this->passwordhashcolumn]) |
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) { |
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Logger::error('sqlauth:' . $this->authId . |
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': column ' . $this->passwordhashcolumn . ' must be in every result tuple.'); |
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throw new \SimpleSAML\Error\Error('WRONGUSERPASS'); |
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} |
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if ($pwhash) { |
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if ($pwhash != $row[$this->passwordhashcolumn]) { |
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Logger::error('sqlauth:' . $this->authId . |
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': column ' . $this->passwordhashcolumn . ' must be THE SAME in every result tuple.'); |
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throw new \SimpleSAML\Error\Error('WRONGUSERPASS'); |
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} |
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} |
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$pwhash = $row[$this->passwordhashcolumn]; |
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} |
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/** |
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* This should never happen as the count(data) test above would have already thrown. |
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* But checking twice doesn't hurt. |
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*/ |
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if (is_null($pwhash)) { |
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if ($pwhash != $row[$this->passwordhashcolumn]) { |
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Logger::error('sqlauth:' . $this->authId . |
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': column ' . $this->passwordhashcolumn . ' does not contain a password hash.'); |
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throw new \SimpleSAML\Error\Error('WRONGUSERPASS'); |
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} |
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} |
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/** |
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* VERIFICATION! |
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* Now to check if the password the user supplied is actually valid |
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*/ |
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if (!password_verify($password, $pwhash)) { |
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Logger::error('sqlauth:' . $this->authId . ': password is incorrect.'); |
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throw new \SimpleSAML\Error\Error('WRONGUSERPASS'); |
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} |
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$this->extractAttributes($attributes, $data, [$this->passwordhashcolumn]); |
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} |
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Logger::info('sqlauth:' . $this->authId . ': Attributes: ' . |
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implode(',', array_keys($attributes))); |
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return $attributes; |
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} |
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} |
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simplesamlphp /
simplesamlphp-module-sqlauth
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