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AccountHub/lib/login.php

511 lines
17 KiB
PHP

<?php
/**
* Authentication and account functions
*/
use Base32\Base32;
use OTPHP\TOTP;
use LdapTools\LdapManager;
use LdapTools\Object\LdapObjectType;
$ldap = new LdapManager($ldap_config);
////////////////////////////////////////////////////////////////////////////////
// Account handling //
////////////////////////////////////////////////////////////////////////////////
/**
* Add a user to the system. /!\ Assumes input is OK /!\
* @param string $username Username, saved in lowercase.
* @param string $password Password, will be hashed before saving.
* @param string $realname User's real legal name
* @param string $email User's email address.
* @param string $phone1 Phone number #1
* @param string $phone2 Phone number #2
* @param string $type Account type
* @return int The new user's ID number in the database.
*/
function adduser($username, $password, $realname, $email = null, $phone1 = "", $phone2 = "", $type) {
global $database;
$database->insert('accounts', [
'username' => strtolower($username),
'password' => (is_null($password) ? null : encryptPassword($password)),
'realname' => $realname,
'email' => $email,
'phone1' => $phone1,
'phone2' => $phone2,
'acctstatus' => 1,
'accttype' => $type
]);
//var_dump($database->error());
return $database->id();
}
/**
* Change the password for the current user.
* @global $database $database
* @global LdapManager $ldap
* @param string $old The current password
* @param string $new The new password
* @param string $new2 New password again
* @param [string] $error If the function returns false, this will have an array
* with a message ID from `lang/messages.php` and (depending on the message) an
* extra string for that message.
* @return boolean true if the password is changed, else false
*/
function change_password($old, $new, $new2, &$error) {
global $database, $ldap;
// make sure the new password isn't the same as the current one
if ($old == $new) {
$error = ["passwords_same"];
return false;
}
// Make sure the new passwords are the same
if ($new != $new2) {
$error = ["new_password_mismatch"];
return false;
}
// check the current password
$login_ok = authenticate_user($_SESSION['username'], $old, $errmsg, $errcode);
// Allow login if the error is due to expired password
if (!$login_ok && ($errcode == LdapTools\Connection\ADResponseCodes::ACCOUNT_PASSWORD_EXPIRED || $errcode == LdapTools\Connection\ADResponseCodes::ACCOUNT_PASSWORD_MUST_CHANGE)) {
$login_ok = true;
}
if ($login_ok) {
// Check the new password and make sure it's not stupid
require_once __DIR__ . "/worst_passwords.php";
$passrank = checkWorst500List($new);
if ($passrank !== FALSE) {
$error = ["password_500", $passrank];
return false;
}
if (strlen($new) < MIN_PASSWORD_LENGTH) {
$error = ["weak_password"];
return false;
}
// Figure out how to change the password, then do it
$acctloc = account_location($_SESSION['username']);
if ($acctloc == "LOCAL") {
$database->update('accounts', ['password' => encryptPassword($VARS['newpass'])], ['uid' => $_SESSION['uid']]);
$_SESSION['password'] = $VARS['newpass'];
insertAuthLog(3, $_SESSION['uid']);
return true;
} else if ($acctloc == "LDAP") {
try {
$repository = $ldap->getRepository(LdapObjectType::USER);
$user = $repository->findOneByUsername($_SESSION['username']);
$user->setPassword($VARS['newpass']);
$user->setpasswordMustChange(false);
$ldap->persist($user);
insertAuthLog(3, $_SESSION['uid']);
$_SESSION['password'] = $VARS['newpass'];
return true;
} catch (\Exception $e) {
// Stupid password complexity BS error
if (strpos($e->getMessage(), "DSID-031A11E5") !== FALSE) {
$error = ["password_complexity"];
return false;
}
$error = ["ldap_error", $e->getMessage()];
return false;
}
}
$error = ["account_state_error"];
return false;
}
$error = ["old_password_mismatch"];
return false;
}
/**
* Get where a user's account actually is.
* @param string $username
* @return string "LDAP", "LOCAL", "LDAP_ONLY", or "NONE".
*/
function account_location($username) {
global $database;
$username = strtolower($username);
$user_exists = user_exists_local($username);
if (!$user_exists && !LDAP_ENABLED) {
return false;
}
if ($user_exists) {
$userinfo = $database->select('accounts', ['password'], ['username' => $username])[0];
// if password empty, it's an LDAP user
if (is_empty($userinfo['password']) && LDAP_ENABLED) {
return "LDAP";
} else if (is_empty($userinfo['password']) && !LDAP_ENABLED) {
return "NONE";
} else {
return "LOCAL";
}
} else {
if (user_exists_ldap($username)) {
return "LDAP_ONLY";
} else {
return "NONE";
}
}
}
/**
* Checks the given credentials against the database.
* @param string $username
* @param string $password
* @return boolean True if OK, else false
*/
function authenticate_user($username, $password, &$errormsg, &$errorcode) {
global $database;
global $ldap;
$username = strtolower($username);
if (is_empty($username) || is_empty($password)) {
return false;
}
$loc = account_location($username, $password);
switch ($loc) {
case "LOCAL":
$hash = $database->select('accounts', ['password'], ['username' => $username, "LIMIT" => 1])[0]['password'];
return (comparePassword($password, $hash));
case "LDAP":
return authenticate_user_ldap($username, $password, $errormsg, $errorcode) === TRUE;
case "LDAP_ONLY":
// Authenticate with LDAP and create database account
try {
if (authenticate_user_ldap($username, $password, $errormsg, $errorcode) === TRUE) {
$user = $ldap->getRepository('user')->findOneByUsername($username);
adduser($user->getUsername(), null, $user->getName(), ($user->hasEmailAddress() ? $user->getEmailAddress() : null), "", "", 2);
return true;
}
return false;
} catch (Exception $e) {
$errormsg = $e->getMessage();
return false;
}
default:
return false;
}
}
function user_exists($username) {
return account_location($username) !== "NONE";
}
/**
* Check if a username exists in the local database.
* @param String $username
*/
function user_exists_local($username) {
global $database;
$username = strtolower($username);
return $database->has('accounts', ['username' => $username, "LIMIT" => QUERY_LIMIT]);
}
/**
* Get the account status: NORMAL, TERMINATED, LOCKED_OR_DISABLED,
* CHANGE_PASSWORD, ALERT_ON_ACCESS, or OTHER
* @global $database $database
* @param string $username
* @param string $password
* @return string
*/
function get_account_status($username, &$error) {
global $database;
$username = strtolower($username);
$loc = account_location($username);
if ($loc == "LOCAL") {
$statuscode = $database->select('accounts', [
'[>]acctstatus' => [
'acctstatus' => 'statusid'
]
], [
'accounts.acctstatus',
'acctstatus.statuscode'
], [
'username' => $username,
"LIMIT" => 1
]
)[0]['statuscode'];
return $statuscode;
} else if ($loc == "LDAP" || $loc == "LDAP_ONLY") {
return get_account_status_ldap($username, $error);
} else {
// account isn't setup properly
return "OTHER";
}
}
/**
* Check if the given username has the given permission (or admin access)
* @global $database $database
* @param string $username
* @param string $permcode
* @return boolean TRUE if the user has the permission (or admin access), else FALSE
*/
function account_has_permission($username, $permcode) {
global $database;
return $database->has('assigned_permissions', [
'[>]accounts' => [
'uid' => 'uid'
],
'[>]permissions' => [
'permid' => 'permid'
]
], ['AND' => ['OR' => ['permcode' => $permcode, 'permcode' => 'ADMIN'], 'username' => $username]]) === TRUE;
}
////////////////////////////////////////////////////////////////////////////////
// Login handling //
////////////////////////////////////////////////////////////////////////////////
/**
* Setup $_SESSION values to log in a user
* @param string $username
*/
function doLoginUser($username, $password) {
global $database;
$username = strtolower($username);
$userinfo = $database->select('accounts', ['email', 'uid', 'realname'], ['username' => $username])[0];
$_SESSION['username'] = $username;
$_SESSION['uid'] = $userinfo['uid'];
$_SESSION['email'] = $userinfo['email'];
$_SESSION['realname'] = $userinfo['realname'];
$_SESSION['password'] = $password; // needed for accessing data in other apps
$_SESSION['loggedin'] = true;
}
/**
* Send an alert email to the system admin
*
* Used when an account with the status ALERT_ON_ACCESS logs in
* @param String $username the account username
*/
function sendLoginAlertEmail($username) {
// TODO: add email code
}
function insertAuthLog($type, $uid = null, $data = "") {
global $database;
// find IP address
$ip = "";
if (isset($_SERVER["HTTP_CF_CONNECTING_IP"])) {
$ip = $_SERVER["HTTP_CF_CONNECTING_IP"];
} else if (isset($_SERVER["HTTP_CLIENT_IP"])) {
$ip = $_SERVER["HTTP_CLIENT_IP"];
} else if (isset($_SERVER["HTTP_X_FORWARDED_FOR"])) {
$ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
} else if (isset($_SERVER["HTTP_X_FORWARDED"])) {
$ip = $_SERVER["HTTP_X_FORWARDED"];
} else if (isset($_SERVER["HTTP_FORWARDED_FOR"])) {
$ip = $_SERVER["HTTP_FORWARDED_FOR"];
} else if (isset($_SERVER["HTTP_FORWARDED"])) {
$ip = $_SERVER["HTTP_FORWARDED"];
} else if (isset($_SERVER["REMOTE_ADDR"])) {
$ip = $_SERVER["REMOTE_ADDR"];
} else {
$ip = "NOT FOUND";
}
$database->insert("authlog", ['logtime' => date("Y-m-d H:i:s"), 'logtype' => $type, 'uid' => $uid, 'ip' => $ip, 'otherdata' => $data]);
}
function verifyReCaptcha($response) {
try {
$client = new GuzzleHttp\Client();
$response = $client
->request('POST', "https://www.google.com/recaptcha/api/siteverify", [
'form_params' => [
'secret' => RECAPTCHA_SECRET_KEY,
'response' => $response
]
]);
if ($response->getStatusCode() != 200) {
return false;
}
$resp = json_decode($response->getBody(), TRUE);
if ($resp['success'] === true) {
return true;
} else {
return false;
}
} catch (Exception $e) {
return false;
}
}
////////////////////////////////////////////////////////////////////////////////
// LDAP handling //
////////////////////////////////////////////////////////////////////////////////
/**
* Checks the given credentials against the LDAP server.
* @param string $username
* @param string $password
* @return mixed True if OK, else false or the error code from the server
*/
function authenticate_user_ldap($username, $password, &$errormsg, &$errorcode) {
global $ldap;
if (is_empty($username) || is_empty($password)) {
return false;
}
$username = strtolower($username);
try {
$msg = "";
$code = 0;
if ($ldap->authenticate($username, $password, $msg, $code) === TRUE) {
$errormsg = $msg;
$errorcode = $code;
return true;
} else {
$errormsg = $msg;
$errorcode = $code;
return $msg;
}
} catch (Exception $e) {
$errormsg = $e->getMessage();
return $e->getMessage();
}
}
/**
* Check if a username exists on the LDAP server.
* @global type $ldap_config
* @param type $username
* @return boolean true if yes, else false
*/
function user_exists_ldap($username) {
global $ldap;
try {
$username = strtolower($username);
$lqb = $ldap->buildLdapQuery();
$result = $lqb->fromUsers()
->where(['username' => $username])
->getLdapQuery()
->getResult();
if (count($result) > 0) {
return true;
}
return false;
} catch (Exception $e) {
return false;
}
}
function get_account_status_ldap($username, &$error) {
global $ldap;
try {
$username = strtolower($username);
$normal = $ldap->buildLdapQuery()
->fromUsers()
->where(['enabled' => true, 'passwordMustChange' => false, 'locked' => false, 'disabled' => false, 'username' => $username])
->getLdapQuery()
->getResult();
if (count($normal) == 1) {
return "NORMAL";
}
$disabled = $ldap->buildLdapQuery()
->fromUsers()
->where(['disabled' => true, 'username' => $username])
->getLdapQuery()
->getResult();
$locked = $ldap->buildLdapQuery()
->fromUsers()
->where(['locked' => true, 'username' => $username])
->getLdapQuery()
->getResult();
if (count($disabled) == 1 || count($locked) == 1) {
return "LOCKED_OR_DISABLED";
}
$passwordExpired = $ldap->buildLdapQuery()
->fromUsers()
->where(['passwordMustChange' => true, 'username' => $username])
->getLdapQuery()
->getResult();
if (count($passwordExpired) == 1) {
return "CHANGE_PASSWORD";
}
$other = $ldap->buildLdapQuery()
->fromUsers()
->where(['username' => $username])
->getLdapQuery()
->getResult();
if (count($other) == 0) {
return false;
} else {
return "OTHER";
}
} catch (Exception $e) {
$error = $e->getMessage();
return false;
}
}
////////////////////////////////////////////////////////////////////////////////
// 2-factor authentication //
////////////////////////////////////////////////////////////////////////////////
/**
* Check if a user has TOTP setup
* @global $database $database
* @param string $username
* @return boolean true if TOTP secret exists, else false
*/
function userHasTOTP($username) {
global $database;
$username = strtolower($username);
$secret = $database->select('accounts', 'authsecret', ['username' => $username])[0];
if (is_empty($secret)) {
return false;
}
return true;
}
/**
* Generate a TOTP secret for the given user.
* @param string $username
* @return string OTP provisioning URI (for generating a QR code)
*/
function newTOTP($username) {
global $database;
$username = strtolower($username);
$secret = random_bytes(20);
$encoded_secret = Base32::encode($secret);
$userdata = $database->select('accounts', ['email', 'authsecret', 'realname'], ['username' => $username])[0];
$totp = new TOTP((is_null($userdata['email']) ? $userdata['realname'] : $userdata['email']), $encoded_secret);
$totp->setIssuer(SYSTEM_NAME);
return $totp->getProvisioningUri();
}
/**
* Save a TOTP secret for the user.
* @global $database $database
* @param string $username
* @param string $secret
*/
function saveTOTP($username, $secret) {
global $database;
$username = strtolower($username);
$database->update('accounts', ['authsecret' => $secret], ['username' => $username]);
}
/**
* Verify a TOTP multiauth code
* @global $database
* @param string $username
* @param int $code
* @return boolean true if it's legit, else false
*/
function verifyTOTP($username, $code) {
global $database;
$username = strtolower($username);
$userdata = $database->select('accounts', ['email', 'authsecret'], ['username' => $username])[0];
if (is_empty($userdata['authsecret'])) {
return false;
}
$totp = new TOTP(null, $userdata['authsecret']);
return $totp->verify($code);
}