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<?php
/**
* Authentication source for username & hashed password.
*
* This class is an authentication source which stores all username/hashes in an array,
* and authenticates users against this array.
*
* @author Dyonisius Visser, TERENA.
* @package simpleSAMLphp
*/
class sspmod_authcrypt_Auth_Source_Hash extends sspmod_core_Auth_UserPassBase {
/**
* Our users, stored in an associative array. The key of the array is "<username>:<passwordhash>",
* while the value of each element is a new array with the attributes for each user.
*/
private $users;
/**
* Constructor for this authentication source.
*
* @param array $info Information about this authentication source.
* @param array $config Configuration.
*/
public function __construct($info, $config) {
assert('is_array($info)');
assert('is_array($config)');
/* Call the parent constructor first, as required by the interface. */
parent::__construct($info, $config);
$this->users = array();
/* Validate and parse our configuration. */
foreach ($config as $userpass => $attributes) {
if (!is_string($userpass)) {
throw new Exception('Invalid <username>:<passwordhash> for authentication source ' .
$this->authId . ': ' . $userpass);
}
$userpass = explode(':', $userpass, 2);
if (count($userpass) !== 2) {
throw new Exception('Invalid <username>:<passwordhash> for authentication source ' .
$this->authId . ': ' . $userpass[0]);
}
$username = $userpass[0];
$passwordhash = $userpass[1];
try {
$attributes = SimpleSAML\Utils\Arrays::normalizeAttributesArray($attributes);
} catch(Exception $e) {
throw new Exception('Invalid attributes for user ' . $username .
' in authentication source ' . $this->authId . ': ' .
$e->getMessage());
}
$this->users[$username . ':' . $passwordhash] = $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.
*
* The username is UTF-8 encoded, and the hash is base64 encoded.
*
* @param string $username The username the user wrote.
* @param string $password The password the user wrote.
* @return array Associative array with the users attributes.
*/
protected function login($username, $password) {
assert('is_string($username)');
assert('is_string($password)');
foreach($this->users as $userpass=>$attrs) {
$matches = explode(':', $userpass, 2);
if ($matches[0] === $username) {
if(SimpleSAML\Utils\Crypto::pwValid($matches[1], $password)) {
return $this->users[$userpass];
} else {
SimpleSAML_Logger::debug('Incorrect password "' . $password . '" for user '. $username);
}
}
}
throw new SimpleSAML_Error_Error('WRONGUSERPASS');
}
}
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