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<?php
namespace SimpleSAML\Module\authcrypt\Auth\Source;
use SimpleSAML\Logger;
use SimpleSAML\Utils\Attributes;
use SimpleSAML\Utils\Crypto;
/**
* 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 Hash extends \SimpleSAML\Module\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 $config Configuration.
*
* @throws Exception in case of a configuration error.
*/
public function __construct($info, $config)
{
assert(is_array($info));
assert(is_array($config));
// Call the parent constructor first, as required by the interface
parent::__construct($info, $config);
$this->users = [];
// Validate and parse our configuration
foreach ($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 {
$attributes = Attributes::normalizeAttributesArray($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 $password The password the user wrote.
*
* @return array Associative array with the users attributes.
*
* @throws \SimpleSAML\Error\Error if authentication fails.
*/
protected function login($username, $password)
{
assert(is_string($username));
assert(is_string($password));
foreach ($this->users as $userpass => $attrs) {
$matches = explode(':', $userpass, 2);
if ($matches[0] === $username) {
if (Crypto::pwValid($matches[1], $password)) {
return $attrs;
} else {
Logger::debug('Incorrect password "'.$password.'" for user '.$username);
}
}
}
throw new \SimpleSAML\Error\Error('WRONGUSERPASS');
}
}
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