AuthMeReloaded/samples/website_integration/sha256/integration.php
2016-02-19 19:14:12 +01:00

68 lines
2.6 KiB
PHP

<?php
/*****************************************************************************
* AuthMe website integration logic for SHA256 *
* -------------------------------- *
* Check with authme_check_password() whether the received username and *
* password match the AuthMe MySQL database. Don't forget to adjust the *
* database info in authme_get_hash(). *
* *
* Source: https://github.com/AuthMe-Team/AuthMeReloaded/ *
*****************************************************************************/
/**
* Entry point function to check supplied credentials against the AuthMe database.
*
* @param string $username the username
* @param string $password the password
* @return bool true iff the data is correct, false otherwise
*/
function authme_check_password($username, $password) {
if (is_scalar($username) && is_scalar($password)) {
$hash = authme_get_hash($username);
if ($hash) {
return authme_check_hash($password, $hash);
}
}
return false;
}
/**
* Retrieves the hash associated with the given user from the database.
*
* @param string $username the username whose hash should be retrieved
* @return string|null the hash, or null if unavailable (e.g. username doesn't exist)
*/
function authme_get_hash($username) {
// Add here your database host, username, password and database name
$mysqli = new mysqli('HOST', 'USER', 'PWD', 'DB');
$authme_table = 'authme';
if (mysqli_connect_error()) {
printf('Could not connect to AuthMe database. Errno: %d, error: "%s"',
mysqli_connect_errno(), mysqli_connect_error());
} else {
$stmt = $mysqli->prepare("SELECT password FROM $authme_table WHERE username = ?");
$stmt->bind_param('s', $username);
$stmt->execute();
$stmt->bind_result($password);
if ($stmt->fetch()) {
return $password;
}
}
return null;
}
/**
* Checks the given clear-text password against the hash.
*
* @param string $password the clear-text password to check
* @param string $hash the hash to check the password against
* @return bool true iff the password matches the hash, false otherwise
*/
function authme_check_hash($password, $hash) {
// $SHA$salt$hash, where hash := sha256(sha256(password) . salt)
$parts = explode('$', $hash);
return count($parts) === 4
&& $parts[3] === hash('sha256', hash('sha256', $password) . $parts[2]);
}