82 lines
2.8 KiB
PHP
82 lines
2.8 KiB
PHP
<?php
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require_once __DIR__ . '/../core/security.php';
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require_once __DIR__ . '/../core/logger.php';
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$pdo = require __DIR__ . '/../core/db.php';
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require_once __DIR__ . '/../models/Paste.php';
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require_once __DIR__ . '/../models/Analytics.php';
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$config = require __DIR__ . '/../config/config.php';
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$logger = new Logger('view');
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$analytics = new Analytics($pdo);
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$id = preg_replace('/[^a-f0-9]/i', '', $_GET['id'] ?? '');
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if ($id === '') {
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$logger->warning('View request with invalid or missing paste ID', ['raw_id' => $_GET['id'] ?? '']);
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$analytics->record('paste_not_found', null, ['reason' => 'invalid_id']);
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$errorCode = 404;
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$errorMessage = 'Invalid paste ID.';
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require __DIR__ . '/../../public/error.php';
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exit;
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}
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$paste = new Paste($pdo);
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$data = $paste->get($id);
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if (!$data) {
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$logger->info('Paste not found', ['id' => $id]);
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$analytics->record('paste_not_found', $id);
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$errorCode = 404;
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$errorMessage = 'Paste not found.';
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require __DIR__ . '/../../public/error.php';
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exit;
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}
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if ($data['expire_time'] !== null && time() > (int)$data['expire_time']) {
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$logger->info('Expired paste accessed', ['id' => $id, 'expired_at' => $data['expire_time']]);
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$analytics->record('paste_expired', $id, ['expired_at' => $data['expire_time']]);
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$errorCode = 410;
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$errorMessage = 'This paste has expired.';
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require __DIR__ . '/../../public/error.php';
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exit;
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}
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$needsPassword = (bool)$data['password_hash'];
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$wrongPassword = false;
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$decrypted = null;
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if ($needsPassword) {
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$submitted = $_POST['password'] ?? null;
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if ($submitted !== null) {
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if (password_verify($submitted, $data['password_hash'])) {
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$needsPassword = false;
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$logger->info('Paste unlocked successfully', ['id' => $id]);
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$analytics->record('paste_unlocked', $id);
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} else {
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$wrongPassword = true;
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$logger->warning('Failed password attempt for paste', ['id' => $id]);
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$analytics->record('paste_failed_password', $id);
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}
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} else {
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$analytics->record('paste_password_prompt', $id);
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}
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}
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if (!$needsPassword) {
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$decrypted = decryptText($data['encrypted_text'], $data['iv'], $config['app']['master_key']);
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if ($decrypted === false) {
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$logger->error('Decryption failed for paste', ['id' => $id]);
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$analytics->record('paste_decrypt_error', $id);
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$errorCode = 500;
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$errorMessage = 'Decryption failed. The paste may be corrupted.';
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require __DIR__ . '/../../public/error.php';
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exit;
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}
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$logger->info('Paste viewed', ['id' => $id, 'char_count' => mb_strlen($decrypted, 'UTF-8')]);
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$analytics->record('paste_viewed', $id, [
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'char_count' => mb_strlen($decrypted, 'UTF-8'),
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'has_expiry' => $data['expire_time'] !== null,
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]);
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}
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