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<?php |
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|
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namespace FluentSupport\App\Hooks\Handlers; |
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|
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use FluentSupport\App\Models\Attachment; |
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use FluentSupport\App\Models\Ticket; |
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use FluentSupport\App\Services\EmailClaimService; |
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use FluentSupport\App\Services\Helper; |
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use FluentSupport\Framework\Support\Arr; |
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|
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/** |
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* Public ticket, attachment and email-claim pages. |
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*/ |
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class ExternalPages |
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{ |
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public function route() |
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{ |
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// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- REQUEST_METHOD is server-controlled, sanitized for comparison only |
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$requestMethod = isset($_SERVER['REQUEST_METHOD']) ? sanitize_text_field(wp_unslash($_SERVER['REQUEST_METHOD'])) : ''; |
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if ($requestMethod !== 'GET') { |
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wp_die(esc_html__('Invalid request method', 'fluent-support'), esc_html__('Method Not Allowed', 'fluent-support'), ['response' => 405]); |
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} |
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|
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$this->checkRateLimit(); |
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// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Public endpoint uses hash validation instead of nonces |
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if (!isset($_REQUEST['fs_view'])) { |
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wp_die(esc_html__('Missing required parameter', 'fluent-support'), esc_html__('Bad Request', 'fluent-support'), ['response' => 400]); |
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} |
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|
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// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Public endpoint uses hash validation instead of nonces |
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$route = isset($_REQUEST['fs_view']) ? sanitize_text_field(wp_unslash($_REQUEST['fs_view'])) : ''; |
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|
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if (empty($route)) { |
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wp_die(esc_html__('Missing required parameter', 'fluent-support'), esc_html__('Bad Request', 'fluent-support'), ['response' => 400]); |
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} |
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|
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$methodMaps = [ |
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'ticket' => 'handleTicketView', |
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'email_claim' => 'handleEmailClaim' |
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]; |
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|
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if (isset($methodMaps[$route])) { |
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$this->verifyPublicEndpointSecurity($route); |
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$this->{$methodMaps[$route]}(); |
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} else { |
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wp_die(esc_html__('Invalid route', 'fluent-support'), esc_html__('Not Found', 'fluent-support'), ['response' => 404]); |
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} |
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} |
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|
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/** |
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* Request or confirm moving the support address to the WP account's email. |
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* |
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* `fs_claim_action=send` sends mail, so it needs a nonce. `fs_claim=<token>` is |
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* the signed link from that mail and still requires the requesting account. |
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* |
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* @return void |
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*/ |
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public function handleEmailClaim() |
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{ |
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$baseUrl = Helper::getPortalBaseUrl(); |
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|
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if (!$baseUrl) { |
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wp_die(esc_html__('Invalid route', 'fluent-support'), esc_html__('Not Found', 'fluent-support'), ['response' => 404]); |
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} |
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|
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// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- routing only; the send branch verifies a nonce and the confirm branch verifies a signature |
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$action = isset($_GET['fs_claim_action']) ? sanitize_text_field(wp_unslash($_GET['fs_claim_action'])) : ''; |
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|
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if ($action === 'send') { |
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$this->handleEmailClaimRequest(); |
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} |
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|
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// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- the token is a signed secret delivered to the address being claimed |
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$token = isset($_GET['fs_claim']) ? sanitize_text_field(wp_unslash($_GET['fs_claim'])) : ''; |
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|
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if (!$token) { |
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$this->redirectToPortal('invalid'); |
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} |
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|
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if (!get_current_user_id()) { |
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// The mailbox alone isn't enough proof, so require login too. |
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$returnUrl = add_query_arg([ |
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'fs_view' => 'email_claim', |
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'fs_claim' => $token |
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], $baseUrl); |
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|
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wp_safe_redirect(wp_login_url($returnUrl)); |
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exit; |
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} |
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|
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$resolved = EmailClaimService::resolveClaim($token); |
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|
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if ($resolved['status'] !== 'ok') { |
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$this->redirectToPortal($resolved['status']); |
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} |
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|
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EmailClaimService::apply($resolved['customer'], $resolved['email']); |
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|
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$this->redirectToPortal('confirmed'); |
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} |
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|
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/** |
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* @return void |
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*/ |
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protected function handleEmailClaimRequest() |
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{ |
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if (!get_current_user_id()) { |
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$this->redirectToPortal('invalid'); |
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} |
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|
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$nonce = isset($_GET['_wpnonce']) ? sanitize_text_field(wp_unslash($_GET['_wpnonce'])) : ''; |
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|
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if (!wp_verify_nonce($nonce, 'fs_email_claim_send')) { |
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$this->redirectToPortal('invalid'); |
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} |
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|
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$divergence = EmailClaimService::getDivergence(); |
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|
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if (!$divergence) { |
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$this->redirectToPortal('nothing_to_do'); |
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} |
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|
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$error = EmailClaimService::issue($divergence); |
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|
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$this->redirectToPortal($error ?: 'sent'); |
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} |
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|
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/** |
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* @param string $status |
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* @return void |
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*/ |
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protected function redirectToPortal($status) |
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{ |
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wp_safe_redirect(add_query_arg('fs_claim_result', $status, Helper::getPortalBaseUrl())); |
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exit; |
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} |
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|
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public function handleTicketView() |
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{ |
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if (!Helper::isPublicSignedTicketEnabled()) { |
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$this->handleInvalidTicket(); |
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} else { |
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$this->handleValidTicket(); |
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} |
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} |
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|
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/** |
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* Serve an attachment by its `fst_file` hash and signature. |
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* |
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* @return void |
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* @since 3.2.0 |
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*/ |
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public function view_attachment() |
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{ |
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// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- REQUEST_METHOD is server-controlled, sanitized for comparison only |
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$requestMethod = isset($_SERVER['REQUEST_METHOD']) ? sanitize_text_field(wp_unslash($_SERVER['REQUEST_METHOD'])) : ''; |
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if ($requestMethod !== 'GET') { |
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wp_die(esc_html__('Invalid request method', 'fluent-support'), esc_html__('Method Not Allowed', 'fluent-support'), ['response' => 405]); |
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} |
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|
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$this->checkRateLimit(); |
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|
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// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Public endpoint uses signature validation instead of nonces |
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if (!isset($_REQUEST['fst_file'])) { |
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wp_die(esc_html__('Missing required parameter', 'fluent-support'), esc_html__('Bad Request', 'fluent-support'), ['response' => 400]); |
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} |
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|
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// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Public endpoint uses signature validation instead of nonces |
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$attachmentHash = isset($_REQUEST['fst_file']) ? sanitize_text_field(wp_unslash($_REQUEST['fst_file'])) : ''; |
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|
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if (empty($attachmentHash)) { |
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wp_die(esc_html__('Invalid attachment hash.', 'fluent-support'), esc_html__('Bad Request', 'fluent-support'), ['response' => 400]); |
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} |
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|
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$attachment = $this->getAttachmentByHash($attachmentHash); |
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|
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if (!$attachment) { |
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wp_die(esc_html__('Invalid attachment hash.', 'fluent-support'), esc_html__('Not Found', 'fluent-support'), ['response' => 404]); |
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} |
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|
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// Inline (pasted) images skip the signature because they are already embedded in emails. |
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if ($attachment->status !== 'inline' && !$this->validateAttachmentSignature($attachment)) { |
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$dieMessage = esc_html__('Sorry, Your secure sign is invalid, Please reload the previous page and get new signed url', 'fluent-support'); |
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wp_die(esc_html($dieMessage), esc_html__('Forbidden', 'fluent-support'), ['response' => 403]); |
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} |
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|
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if ('local' !== $attachment->driver) { |
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$fileUrl = apply_filters('fluent_support/external_attachment_url', $attachment->full_url, $attachment); |
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if (!empty($fileUrl)) { |
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$this->redirectToExternalAttachment($fileUrl); |
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} else { |
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die('File could not be found'); |
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} |
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} |
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|
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if (!file_exists($attachment->file_path)) { |
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die('File could not be found'); |
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} |
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$this->serveLocalAttachment($attachment); |
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} |
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|
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private function getAttachmentByHash($attachmentHash) |
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{ |
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return Attachment::where('file_hash', $attachmentHash)->first(); |
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} |
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|
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private function validateAttachmentSignature($attachment) |
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{ |
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// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Public endpoint uses signature validation instead of nonces |
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if (!isset($_REQUEST['secure_sign'])) { |
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return false; |
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} |
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|
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// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Public endpoint uses signature validation instead of nonces |
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$secureSign = isset($_REQUEST['secure_sign']) ? sanitize_text_field(wp_unslash($_REQUEST['secure_sign'])) : ''; |
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|
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if (empty($secureSign)) { |
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return false; |
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} |
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|
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// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Public endpoint uses signature validation instead of nonces |
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$expires = isset($_REQUEST['expires']) ? sanitize_text_field(wp_unslash($_REQUEST['expires'])) : ''; |
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|
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if ($expires === '') { |
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// Legacy URL signed for the current UTC hour only. |
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return hash_equals(Attachment::legacySignature($attachment->id, gmdate('YmdH')), $secureSign); |
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} |
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|
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if (!ctype_digit($expires) || (int) $expires < time()) { |
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return false; |
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} |
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|
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return hash_equals(Attachment::signature($attachment->id, (int) $expires), $secureSign); |
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} |
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|
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private function handleInvalidTicket() |
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{ |
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// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Public endpoint uses hash validation instead of nonces |
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if (!isset($_REQUEST['ticket_id'])) { |
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wp_die(esc_html__('Missing ticket ID parameter', 'fluent-support'), esc_html__('Bad Request', 'fluent-support'), ['response' => 400]); |
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} |
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|
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// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Public endpoint uses hash validation instead of nonces |
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$ticketId = isset($_REQUEST['ticket_id']) ? absint($_REQUEST['ticket_id']) : 0; |
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|
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if ($ticketId <= 0) { |
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wp_die(esc_html__('Invalid ticket ID', 'fluent-support'), esc_html__('Bad Request', 'fluent-support'), ['response' => 400]); |
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} |
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|
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$ticket = Ticket::wherePublicIdentifier($ticketId)->first(); |
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|
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if (!$ticket) { |
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$this->showInvalidPortalMessage(); |
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} else { |
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$this->redirectToTicketView($ticket); |
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} |
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} |
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|
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private function handleValidTicket() |
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{ |
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// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Public endpoint uses hash validation instead of nonces |
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if (!isset($_REQUEST['support_hash']) || !isset($_REQUEST['ticket_id'])) { |
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wp_die(esc_html__('Missing required parameters', 'fluent-support'), esc_html__('Bad Request', 'fluent-support'), ['response' => 400]); |
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} |
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|
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// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Public endpoint uses hash validation instead of nonces |
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$ticketHash = isset($_REQUEST['support_hash']) ? sanitize_text_field(wp_unslash($_REQUEST['support_hash'])) : ''; |
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// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Public endpoint uses hash validation instead of nonces |
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$ticketId = isset($_REQUEST['ticket_id']) ? absint($_REQUEST['ticket_id']) : 0; |
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|
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if (empty($ticketHash) || !preg_match('/^[a-zA-Z0-9]+$/', $ticketHash)) { |
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wp_die(esc_html__('Invalid ticket hash format', 'fluent-support'), esc_html__('Bad Request', 'fluent-support'), ['response' => 400]); |
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} |
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|
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if ($ticketId <= 0) { |
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wp_die(esc_html__('Invalid ticket ID', 'fluent-support'), esc_html__('Bad Request', 'fluent-support'), ['response' => 400]); |
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} |
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|
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$ticket = Ticket::where('hash', $ticketHash) |
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->wherePublicIdentifier($ticketId) |
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->first(); |
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|
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if (!$ticket) { |
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$this->showInvalidPortalMessage(); |
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} elseif (get_current_user_id()) { |
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$this->redirectToTicketView($ticket); |
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} |
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// Logged-out visitors stay on the signed URL; the portal app reads the hash from it. |
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} |
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|
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private function showInvalidPortalMessage() |
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{ |
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echo '<h3 style="text-align: center; margin: 50px 0;">' . esc_html__('Invalid Support Portal URL', 'fluent-support') . '</h3>'; |
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die(); |
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} |
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|
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private function redirectToTicketView($ticket) |
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{ |
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$redirectUrl = Helper::getTicketViewUrl($ticket); |
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$this->redirectToExternalAttachment($redirectUrl); |
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} |
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|
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private function redirectToExternalAttachment($redirectUrl) |
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{ |
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// Not wp_safe_redirect: remote attachments (Drive, Dropbox) live on other hosts. |
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wp_redirect($redirectUrl, 307); |
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exit(); |
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} |
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|
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private function serveLocalAttachment($attachment) |
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{ |
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$file_path = realpath($attachment->file_path); |
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$uploads = wp_upload_dir(); |
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$uploads_dir = realpath($uploads['basedir']); |
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|
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if (!$file_path || !$uploads_dir || strpos($file_path, $uploads_dir) !== 0 || !file_exists($file_path)) { |
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wp_die(esc_html__('File not found or access denied', 'fluent-support'), 403); |
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return; |
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} |
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|
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ob_get_clean(); |
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$original_user_agent = ini_get('user_agent'); |
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// phpcs:ignore WordPress.PHP.IniSet.Risky -- Temporary change for file serving, restored immediately after |
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ini_set('user_agent', 'Fluent Support/' . FLUENT_SUPPORT_VERSION . '; ' . esc_url(get_bloginfo('url'))); |
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|
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header("Content-Type: " . esc_attr($attachment->file_type)); |
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header("Content-Disposition: inline; filename=\"" . esc_attr($attachment->title) . "\""); |
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|
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// phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_readfile -- Direct file serving required for attachment download |
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readfile($file_path); |
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|
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// phpcs:ignore WordPress.PHP.IniSet.Risky -- Restoring original value |
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ini_set('user_agent', $original_user_agent); |
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die(); |
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} |
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|
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private function verifyPublicEndpointSecurity($route) |
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{ |
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switch ($route) { |
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case 'ticket': |
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// support_hash is only required when signed ticket links are enabled. |
| 342 |
// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Public endpoint uses hash validation instead of nonces |
| 343 |
if (!isset($_REQUEST['ticket_id'])) { |
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wp_die(esc_html__('Missing ticket ID parameter', 'fluent-support'), esc_html__('Bad Request', 'fluent-support'), ['response' => 400]); |
| 345 |
} |
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break; |
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|
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default: |
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break; |
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} |
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} |
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|
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/** |
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* 30 requests per minute per IP on the public endpoints. |
| 355 |
*/ |
| 356 |
private function checkRateLimit() |
| 357 |
{ |
| 358 |
$ip = Helper::getIp(); |
| 359 |
$transient_key = 'fs_rate_limit_' . wp_hash($ip); |
| 360 |
$requests = get_transient($transient_key); |
| 361 |
|
| 362 |
if ($requests === false) { |
| 363 |
set_transient($transient_key, 1, 60); |
| 364 |
} else { |
| 365 |
$requests++; |
| 366 |
if ($requests > 30) { |
| 367 |
wp_die(esc_html__('Rate limit exceeded. Please try again later.', 'fluent-support'), esc_html__('Too Many Requests', 'fluent-support'), ['response' => 429]); |
| 368 |
} |
| 369 |
set_transient($transient_key, $requests, 60); |
| 370 |
} |
| 371 |
} |
| 372 |
} |
| 373 |
|
