Security hardening: invited user onboarding flow (C1–N7)
This commit is contained in:
Thanakorn S
@@ -12,15 +12,17 @@
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* Full flow:
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* 1. Session guard — rejects if 'invited_user_id' is missing.
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* 2. CSRF check.
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* 3. Re-validate token against DB (expiry + status='pending' + license='user').
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* 4. Validate and sanitise input fields.
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* 5. Username format and uniqueness check.
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* 6. Password match and strength check.
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* 7. Hash password.
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* 3. Validate and sanitise input fields (before acquiring DB locks).
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* 4. Username format check.
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* 5. Password match and strength check.
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* 6. Hash password.
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* 7. BEGIN TRANSACTION — SELECT FOR UPDATE to atomically re-validate token
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* (expiry + status='pending' + license='user').
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* 8. UPDATE user: name, surname, username, password, status='active',
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* verify_token=NULL, verify_expires_at=NULL.
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* 9. UPDATE company_map_user: invite_token=NULL.
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* 10. Return { success: 1 }.
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* verify_token=NULL, verify_expires_at=NULL. Catches SQLSTATE 23000
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* (duplicate username). Checks rowCount()=1.
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* 9. UPDATE company_map_user: invite_token=NULL, invite_expires_at=NULL.
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* 10. COMMIT. Return { success: 1 }.
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*/
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require_once '../../../session.php';
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@@ -58,43 +60,26 @@ $data = json_decode($_POST['json'] ?? '{}', true) ?: [];
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try {
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// ── Step 3: Re-validate token ─────────────────────────────────────────────
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$sth = $pdo1->prepare(
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"SELECT user_id FROM user
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WHERE user_id = :uid
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AND verify_token = :token
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AND status = 'pending'
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AND license = 'user'
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AND verify_expires_at > NOW()
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LIMIT 1"
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);
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$sth->execute([':uid' => $user_id, ':token' => $token]);
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if (!$sth->fetchColumn()) {
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$answer['message'] = 'Invitation has expired or already been used. Please request a new invitation.';
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http_response_code(403);
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exit(json_encode($answer));
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}
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// ── Step 4: Sanitise and validate input ───────────────────────────────────
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$name = trim($data['name'] ?? '');
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$surname = trim($data['surname'] ?? '');
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// Done before the transaction so validation errors don't acquire DB locks.
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$name = trim($data['name'] ?? '');
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$surname = trim($data['surname'] ?? '');
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$username = strtolower(trim($data['username'] ?? ''));
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$password = $data['password'] ?? '';
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$confirm = $data['confirm_password'] ?? '';
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$password = $data['password'] ?? '';
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$confirm = $data['confirm_password'] ?? '';
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if (!$name || !$surname || !$username || !$password || !$confirm) {
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throw new Exception('All fields are required.');
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}
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// ── Step 5: Username format and uniqueness ────────────────────────────────
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if (!preg_match('/^[a-z0-9_]+$/', $username)) {
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throw new Exception('Username may only contain lowercase letters, numbers and underscores.');
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// ── Step 5: Username format, length, and reserved names ──────────────────
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if (!preg_match('/^[a-z0-9_]{3,32}$/', $username)) {
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throw new Exception('Username must be 3–32 characters and may only contain lowercase letters, numbers and underscores.');
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}
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$sth = $pdo1->prepare("SELECT user_id FROM user WHERE username = :u AND user_id != :uid LIMIT 1");
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$sth->execute([':u' => $username, ':uid' => $user_id]);
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if ($sth->fetchColumn()) {
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throw new Exception('Username is already taken. Please choose another.');
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$reserved = ['admin', 'owner', 'support', 'root', 'system', 'superuser', 'administrator'];
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if (in_array($username, $reserved, true)) {
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throw new Exception('That username is reserved. Please choose another.');
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}
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// ── Step 6: Password match and strength ───────────────────────────────────
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@@ -109,32 +94,77 @@ try {
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throw new Exception('Password is too weak. ' . $msg);
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}
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// ── Step 7–8: Hash and activate account ──────────────────────────────────
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$hashed = password_hash($password, PASSWORD_BCRYPT);
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$pdo1->prepare(
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// ── Steps 3 + 7–9: Atomic token re-validation and activation ─────────────
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// SELECT FOR UPDATE locks the row so a concurrent resendInvite or removeUser
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// cannot mutate the token between our check and the UPDATE.
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$pdo1->beginTransaction();
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$sth = $pdo1->prepare(
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"SELECT user_id FROM user
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WHERE user_id = :uid
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AND verify_token = :token
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AND status = 'pending'
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AND license = 'user'
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AND verify_expires_at > NOW()
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LIMIT 1
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FOR UPDATE"
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);
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$sth->execute([':uid' => $user_id, ':token' => $token]);
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if (!$sth->fetchColumn()) {
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$pdo1->rollBack();
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$answer['message'] = 'Invitation has expired or already been used. Please request a new invitation.';
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http_response_code(403);
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exit(json_encode($answer));
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}
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// ── Step 7–8: Activate account ────────────────────────────────────────────
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$stmt = $pdo1->prepare(
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"UPDATE user
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SET name = :name,
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surname = :surname,
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username = :username,
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password = :password,
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status = 'active',
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verify_token = NULL,
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verify_expires_at = NULL
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SET name = :name,
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surname = :surname,
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username = :username,
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password = :password,
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status = 'active',
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verify_token = NULL,
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verify_expires_at = NULL
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WHERE user_id = :uid"
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)->execute([
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':name' => $name,
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':surname' => $surname,
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':username' => $username,
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':password' => $hashed,
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':uid' => $user_id,
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]);
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);
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try {
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$stmt->execute([
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':name' => $name,
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':surname' => $surname,
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':username' => $username,
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':password' => $hashed,
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':uid' => $user_id,
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]);
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} catch (PDOException $e) {
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$pdo1->rollBack();
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// SQLSTATE 23000 = unique constraint violation (duplicate username)
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if ($e->getCode() === '23000') {
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throw new Exception('Username is already taken. Please choose another.');
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}
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throw $e;
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}
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if ($stmt->rowCount() !== 1) {
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$pdo1->rollBack();
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$answer['message'] = 'Invitation is no longer valid.';
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http_response_code(403);
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exit(json_encode($answer));
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}
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// ── Step 9: Clear invite token from company_map_user ─────────────────────
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$pdo1->prepare(
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"UPDATE company_map_user SET invite_token = NULL WHERE user_id = :uid"
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"UPDATE company_map_user
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SET invite_token = NULL, invite_expires_at = NULL
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WHERE user_id = :uid"
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)->execute([':uid' => $user_id]);
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$pdo1->commit();
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// ── Step 10: Clear session invite keys ────────────────────────────────────
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unset($_SESSION['invited_user_id'], $_SESSION['invited_token']);
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@@ -142,6 +172,7 @@ try {
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$answer['message'] = 'Account setup complete.';
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} catch (Exception $e) {
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if ($pdo1->inTransaction()) $pdo1->rollBack();
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$answer['message'] = $e->getMessage();
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http_response_code(400);
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}
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