274 lines
12 KiB
PHP
274 lines
12 KiB
PHP
<?php
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/**
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* PasswordResetManager
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*
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* Handles the full OTP-based password reset flow.
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* Reusable across:
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* - Profile page: "Forgot your current password?" (authenticated user)
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* - Login page: "Forgot password?" (unauthenticated user)
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*
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* Flow:
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* 1. requestOtp($user_id) — generate OTP, email it, store in session
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* 2. confirmReset($user_id, ...) — verify OTP, call PasswordManager::forceSet()
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*
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* HTTP handler methods for thin endpoint wrappers:
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* handleRequestOtp($user_id)
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* handleConfirmReset($user_id, $data)
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*
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* Session keys used (prefixed to avoid collision with login OTP):
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* reset_otp, reset_otp_time, reset_reference, reset_user_id
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*/
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class PasswordResetManager {
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private $pdo1;
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private $pdo2;
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private $include_url;
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private $SMTP;
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private $pinkey;
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/** OTP validity window in minutes — matches login OTP */
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const OTP_EXPIRY_MINUTES = 5;
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/**
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* @param PDO $pdo1 Main DB (user table)
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* @param PDO $pdo2 Company DB (smtp_setting table)
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* @param string $include_url Absolute server path to app root (for requires)
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* @param array $SMTP System default SMTP config from config.php
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* @param string $pinkey Encryption key from config.php
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*/
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public function __construct($pdo1, $pdo2, string $include_url, array $SMTP, string $pinkey) {
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$this->pdo1 = $pdo1;
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$this->pdo2 = $pdo2;
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$this->include_url = rtrim($include_url, '/');
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$this->SMTP = $SMTP;
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$this->pinkey = $pinkey;
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}
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// ─────────────────────────────────────────────────────────────
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// Public: request OTP
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// ─────────────────────────────────────────────────────────────
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/**
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* Generate OTP, send it to the user's registered email, store in session.
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*
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* @param int $user_id From session (profile) or looked-up by email/username (login)
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* @param int $company_id For SMTP fallback lookup
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* @return array ['masked_email' => string, 'reference' => string]
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*
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* @throws \RuntimeException if user not found or email missing
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* @throws \Exception if mailer fails (mailer calls exit internally)
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*/
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public function requestOtp(int $user_id, int $company_id = 0): array {
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// ── Fetch user ────────────────────────────────────────────
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$sth = $this->pdo1->prepare(
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'SELECT user_id, email, password FROM user WHERE user_id = :id LIMIT 1'
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);
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$sth->execute([':id' => $user_id]);
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$user = $sth->fetch(\PDO::FETCH_ASSOC);
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if (!$user || empty($user['email'])) {
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throw new \RuntimeException('No email address found for this account.');
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}
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// ── Generate OTP ──────────────────────────────────────────
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$otp_time = time();
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$otp = $this->generateOTP($user['password'], $otp_time);
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$reference_number = $this->numberToLetters((int) $this->generateOTP($otp, $otp_time));
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// ── Send email ────────────────────────────────────────────
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require_once $this->include_url . '/assets/utils/module/mailer.php';
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$mailer = new mailer(['pdo1' => $this->pdo1, 'pdo2' => $this->pdo2]);
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$mailer->send_email([
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'company_id' => $company_id,
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'smtp' => $this->SMTP,
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'subject' => 'Password Reset OTP — Reference: ' . $reference_number,
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'message' => implode("\n", [
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"Your password reset OTP is: {$otp}",
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"Reference number: {$reference_number}",
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"",
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"This OTP is valid for " . self::OTP_EXPIRY_MINUTES . " minutes.",
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"If you did not request this, please ignore this email.",
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]),
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'channel_name' => 'WMS Security',
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'to' => $user['email'],
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'key' => $this->pinkey,
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]);
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// ── Store in session ──────────────────────────────────────
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$_SESSION['reset_otp'] = $otp;
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$_SESSION['reset_otp_time'] = $otp_time;
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$_SESSION['reset_reference'] = $reference_number;
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$_SESSION['reset_user_id'] = $user_id;
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// ── Return masked email for UI display ────────────────────
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return [
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'masked_email' => $this->maskEmail($user['email']),
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'reference' => $reference_number,
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];
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}
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// ─────────────────────────────────────────────────────────────
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// Public: confirm reset
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// ─────────────────────────────────────────────────────────────
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/**
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* Verify OTP then force-set new password via PasswordManager.
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*
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* @param int $user_id
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* @param string $otp_input
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* @param string $new_password
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* @param string $confirm_password
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*
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* @throws \InvalidArgumentException OTP invalid/expired, passwords weak/mismatch
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* @throws \RuntimeException DB or session state error
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*/
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public function confirmReset(int $user_id, string $otp_input, string $new_password, string $confirm_password): void {
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// ── Validate session state ────────────────────────────────
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if (empty($_SESSION['reset_otp']) || empty($_SESSION['reset_otp_time'])) {
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throw new \InvalidArgumentException('No active reset request. Please request a new OTP.');
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}
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// ── Verify ownership ──────────────────────────────────────
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if ((int)$_SESSION['reset_user_id'] !== $user_id) {
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throw new \RuntimeException('Invalid reset request.');
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}
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// ── Check expiry ──────────────────────────────────────────
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$elapsed_minutes = (time() - (int)$_SESSION['reset_otp_time']) / 60;
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if ($elapsed_minutes > self::OTP_EXPIRY_MINUTES) {
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$this->clearSession();
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throw new \InvalidArgumentException('OTP has expired. Please request a new one.');
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}
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// ── Verify OTP value ──────────────────────────────────────
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if (trim($otp_input) !== $_SESSION['reset_otp']) {
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throw new \InvalidArgumentException('Incorrect OTP. Please try again.');
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}
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// ── Force-set password via PasswordManager ────────────────
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require_once $this->include_url . '/assets/utils/classes/PasswordManager.php';
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$pm = new PasswordManager($this->pdo1, $this->include_url);
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$pm->forceSet($user_id, $new_password, $confirm_password);
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// ── Clear full session on success ────────────────────────
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// Destroys the login session so the user must re-authenticate
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// with their new password. The OTP in db_auth would invalidate
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// naturally on next request anyway (hash changed), but clearing
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// here is immediate and explicit.
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$this->clearSession();
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session_destroy();
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}
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// ─────────────────────────────────────────────────────────────
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// Public: HTTP handlers (thin endpoint wrappers call these)
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// ─────────────────────────────────────────────────────────────
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/**
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* Handle AJAX request-OTP call and echo JSON.
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* Endpoint: setting/api/engine/request_reset_otp.php
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* login/api/engine/request_reset_otp.php
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*/
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public function handleRequestOtp(int $user_id, int $company_id = 0): void {
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try {
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$result = $this->requestOtp($user_id, $company_id);
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echo json_encode([
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'success' => 1,
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'masked_email' => $result['masked_email'],
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'reference' => $result['reference'],
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]);
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} catch (\RuntimeException $e) {
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error_log('[PasswordResetManager::handleRequestOtp] ' . $e->getMessage());
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http_response_code(500);
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echo json_encode(['success' => 0, 'message' => $e->getMessage()]);
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} catch (\Exception $e) {
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error_log('[PasswordResetManager::handleRequestOtp] ' . $e->getMessage());
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http_response_code(500);
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echo json_encode(['success' => 0, 'message' => 'Failed to send OTP. Please try again.']);
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}
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exit;
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}
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/**
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* Handle AJAX confirm-reset call and echo JSON.
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* Endpoint: setting/api/engine/reset_password_otp.php
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* login/api/engine/reset_password_otp.php
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*
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* Expected $data keys: otp, new_password, confirm_password
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*/
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public function handleConfirmReset(int $user_id, array $data): void {
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try {
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$this->confirmReset(
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$user_id,
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$data['otp'] ?? '',
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$data['new_password'] ?? '',
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$data['confirm_password'] ?? ''
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);
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echo json_encode(['success' => 1, 'message' => 'Password reset successfully.']);
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} catch (\InvalidArgumentException $e) {
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http_response_code(400);
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echo json_encode(['success' => 0, 'message' => $e->getMessage()]);
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} catch (\Exception $e) {
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error_log('[PasswordResetManager::handleConfirmReset] ' . $e->getMessage());
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http_response_code(500);
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echo json_encode(['success' => 0, 'message' => 'Failed to reset password. Please try again.']);
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}
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exit;
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}
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// ─────────────────────────────────────────────────────────────
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// Private helpers
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// ─────────────────────────────────────────────────────────────
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private function generateOTP(string $secret_key, int $otp_time, int $time_step = 180, int $length = 6): string {
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$counter = floor($otp_time / $time_step);
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$data = pack('NN', 0, $counter);
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$hash = hash_hmac('sha1', $data, $secret_key, true);
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$offset = ord(substr($hash, -1)) & 0x0F;
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$value = unpack('N', substr($hash, $offset, 4));
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$otp = ($value[1] & 0x7FFFFFFF) % pow(10, $length);
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return str_pad(strval($otp), $length, '0', STR_PAD_LEFT);
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}
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private function numberToLetters(int $num): string {
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$result = '';
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while ($num > 0) {
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$mod = ($num - 1) % 26;
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$result = chr(65 + $mod) . $result;
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$num = intval(($num - $mod) / 26);
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}
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return str_pad($result, 6, 'A', STR_PAD_LEFT);
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}
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private function maskEmail(string $email): string {
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$at = strpos($email, '@');
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return substr($email, 0, 2)
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. str_repeat('*', max(1, $at - 2))
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. substr($email, $at);
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}
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private function clearSession(): void {
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unset(
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$_SESSION['reset_otp'],
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$_SESSION['reset_otp_time'],
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$_SESSION['reset_reference'],
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$_SESSION['reset_user_id']
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);
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}
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} |