| 1 |
<?php |
| 2 |
|
| 3 |
namespace BitCode\BitForm\Core\Util; |
| 4 |
|
| 5 |
use BitCode\BitForm\Admin\Form\Helpers; |
| 6 |
use BitCode\BitForm\Core\Form\FormManager; |
| 7 |
use BitCode\BitForm\enshrined\svgSanitize\Sanitizer; |
| 8 |
|
| 9 |
if (!defined('ABSPATH')) { |
| 10 |
exit; |
| 11 |
} |
| 12 |
final class FileHandler |
| 13 |
{ |
| 14 |
public function rmrf($dir) |
| 15 |
{ |
| 16 |
$fs = self::initWpFilesystem(); |
| 17 |
if ($fs && $fs->exists($dir)) { |
| 18 |
$fs->delete($dir, true); |
| 19 |
} |
| 20 |
} |
| 21 |
|
| 22 |
public function cpyr($source, $destination) |
| 23 |
{ |
| 24 |
if (is_dir($source)) { |
| 25 |
wp_mkdir_p($destination); |
| 26 |
// chmod($destination, 0744); |
| 27 |
$objects = scandir($source); |
| 28 |
foreach ($objects as $object) { |
| 29 |
if ('.' !== $object && '..' !== $object) { |
| 30 |
if (is_dir($source . DIRECTORY_SEPARATOR . $object) && !is_link($source . DIRECTORY_SEPARATOR . $object)) { |
| 31 |
cpyr($source . DIRECTORY_SEPARATOR . $object, $destination . DIRECTORY_SEPARATOR . $object); |
| 32 |
} elseif (is_file($source . DIRECTORY_SEPARATOR . $object)) { |
| 33 |
copy($source . DIRECTORY_SEPARATOR . $object, $destination . DIRECTORY_SEPARATOR . $object); |
| 34 |
// chmod($destination. DIRECTORY_SEPARATOR .$object, 0644); |
| 35 |
} else { |
| 36 |
symlink($source . DIRECTORY_SEPARATOR . $object, $destination . DIRECTORY_SEPARATOR . $object); |
| 37 |
} |
| 38 |
} |
| 39 |
} |
| 40 |
} else { |
| 41 |
copy($source, $destination); |
| 42 |
} |
| 43 |
} |
| 44 |
|
| 45 |
public function moveUploadedFiles($file_details, $form_id, $entry_id) |
| 46 |
{ |
| 47 |
require_once ABSPATH . 'wp-admin/includes/file.php'; |
| 48 |
|
| 49 |
$file_upoalded = []; |
| 50 |
$_upload_dir = self::getEntriesFileUploadDir($form_id, $entry_id); |
| 51 |
$_upload_url = self::getEntriesFileUploadURL($form_id, $entry_id); |
| 52 |
$this::createIndexFile($_upload_dir); |
| 53 |
|
| 54 |
$upload_dir_filter = function ($uploads) use ($_upload_dir, $_upload_url) { |
| 55 |
$uploads['path'] = $_upload_dir; |
| 56 |
$uploads['url'] = $_upload_url; |
| 57 |
$uploads['subdir'] = ''; |
| 58 |
$uploads['basedir'] = dirname($_upload_dir); |
| 59 |
$uploads['baseurl'] = dirname($_upload_url); |
| 60 |
return $uploads; |
| 61 |
}; |
| 62 |
|
| 63 |
if (is_array($file_details['name'])) { |
| 64 |
foreach ($file_details['name'] as $key => $value) { |
| 65 |
if (!empty($value)) { |
| 66 |
$fileNameCount = 1; |
| 67 |
$file_upoalded[$key] = sanitize_file_name($value); |
| 68 |
while (file_exists($_upload_dir . DIRECTORY_SEPARATOR . $file_upoalded[$key])) { |
| 69 |
$fileNameWithSeparator = BITFORMS_BF_SEPARATOR . $fileNameCount; |
| 70 |
$file_upoalded[$key] = sanitize_file_name(preg_replace('/(.[a-z A-Z 0-9]+)$/', "{$fileNameWithSeparator}$1", $value)); |
| 71 |
$fileNameCount = $fileNameCount + 1; |
| 72 |
if (11 === $fileNameCount) { |
| 73 |
break; |
| 74 |
} |
| 75 |
} |
| 76 |
$file = [ |
| 77 |
'name' => $file_upoalded[$key], |
| 78 |
'type' => $file_details['type'][$key] ?? '', |
| 79 |
'tmp_name' => $file_details['tmp_name'][$key], |
| 80 |
'error' => $file_details['error'][$key] ?? 0, |
| 81 |
'size' => $file_details['size'][$key] ?? 0, |
| 82 |
]; |
| 83 |
add_filter('upload_dir', $upload_dir_filter); |
| 84 |
$upload_result = wp_handle_upload($file, ['test_form' => false]); |
| 85 |
remove_filter('upload_dir', $upload_dir_filter); |
| 86 |
if (isset($upload_result['error'])) { |
| 87 |
unset($file_upoalded[$key]); |
| 88 |
} else { |
| 89 |
$file_upoalded[$key] = basename($upload_result['file']); |
| 90 |
} |
| 91 |
} |
| 92 |
} |
| 93 |
} else { |
| 94 |
if (!empty($file_details['name'])) { |
| 95 |
$fileNameCount = 1; |
| 96 |
$file_upoalded[0] = sanitize_file_name($file_details['name']); |
| 97 |
while (file_exists($_upload_dir . DIRECTORY_SEPARATOR . $file_upoalded[0])) { |
| 98 |
$fileNameWithSeparator = BITFORMS_BF_SEPARATOR . $fileNameCount; |
| 99 |
$file_upoalded[0] = sanitize_file_name(preg_replace('/(.[a-z A-Z 0-9]+)$/', "{$fileNameWithSeparator}$1", $file_details['name'])); |
| 100 |
$fileNameCount = $fileNameCount + 1; |
| 101 |
if (11 === $fileNameCount) { |
| 102 |
break; |
| 103 |
} |
| 104 |
} |
| 105 |
$file = [ |
| 106 |
'name' => $file_upoalded[0], |
| 107 |
'type' => $file_details['type'] ?? '', |
| 108 |
'tmp_name' => $file_details['tmp_name'], |
| 109 |
'error' => $file_details['error'] ?? 0, |
| 110 |
'size' => $file_details['size'] ?? 0, |
| 111 |
]; |
| 112 |
add_filter('upload_dir', $upload_dir_filter); |
| 113 |
$upload_result = wp_handle_upload($file, ['test_form' => false]); |
| 114 |
remove_filter('upload_dir', $upload_dir_filter); |
| 115 |
if (isset($upload_result['error'])) { |
| 116 |
unset($file_upoalded[0]); |
| 117 |
} else { |
| 118 |
$file_upoalded[0] = basename($upload_result['file']); |
| 119 |
} |
| 120 |
} |
| 121 |
} |
| 122 |
return $file_upoalded; |
| 123 |
} |
| 124 |
|
| 125 |
public static function isSafeFileName($name) |
| 126 |
{ |
| 127 |
if (!is_string($name)) { |
| 128 |
return false; |
| 129 |
} |
| 130 |
|
| 131 |
$trimmed = trim($name); |
| 132 |
if ('' === $trimmed) { |
| 133 |
return false; |
| 134 |
} |
| 135 |
|
| 136 |
$baseName = basename($trimmed); |
| 137 |
if ('' === $baseName || $baseName !== $trimmed || 'index.php' === $baseName) { |
| 138 |
return false; |
| 139 |
} |
| 140 |
|
| 141 |
return sanitize_file_name($trimmed) === $trimmed; |
| 142 |
} |
| 143 |
|
| 144 |
public function deleteFiles($form_id, $entry_id, $files) |
| 145 |
{ |
| 146 |
$_upload_dir = self::getEntriesFileUploadDir($form_id, $entry_id); |
| 147 |
$resolvedBitformsUploadDir = realpath(BITFORMS_UPLOAD_DIR); |
| 148 |
$resolvedUploadDir = realpath($_upload_dir); |
| 149 |
if (false === $resolvedBitformsUploadDir || false === $resolvedUploadDir) { |
| 150 |
return; |
| 151 |
} |
| 152 |
|
| 153 |
$bitformsUploadDirPrefix = trailingslashit(wp_normalize_path($resolvedBitformsUploadDir)); |
| 154 |
$uploadDirPrefix = trailingslashit(wp_normalize_path($resolvedUploadDir)); |
| 155 |
if (0 !== strpos($uploadDirPrefix, $bitformsUploadDirPrefix)) { |
| 156 |
return; |
| 157 |
} |
| 158 |
|
| 159 |
foreach ((array) $files as $name) { |
| 160 |
if (!self::isSafeFileName($name)) { |
| 161 |
continue; |
| 162 |
} |
| 163 |
|
| 164 |
$candidatePath = $resolvedUploadDir . DIRECTORY_SEPARATOR . $name; |
| 165 |
$resolvedPath = realpath($candidatePath); |
| 166 |
if (false === $resolvedPath || !is_file($resolvedPath)) { |
| 167 |
continue; |
| 168 |
} |
| 169 |
|
| 170 |
$normalizedPath = wp_normalize_path($resolvedPath); |
| 171 |
if (0 !== strpos($normalizedPath, $uploadDirPrefix)) { |
| 172 |
continue; |
| 173 |
} |
| 174 |
|
| 175 |
wp_delete_file($resolvedPath); |
| 176 |
} |
| 177 |
} |
| 178 |
|
| 179 |
public static function getFileUploadError($code) |
| 180 |
{ |
| 181 |
$errors = [ |
| 182 |
0 => __('Unknown upload error', 'bit-form'), |
| 183 |
1 => __('The uploaded file exceeds the upload_max_filesize directive in php.ini.', 'bit-form'), |
| 184 |
2 => __('The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form.', 'bit-form'), |
| 185 |
3 => __('The uploaded file was only partially uploaded.', 'bit-form'), |
| 186 |
4 => __('No file was uploaded.', 'bit-form'), |
| 187 |
6 => __('Missing a temporary folder.', 'bit-form'), |
| 188 |
7 => __('Failed to write file to disk.', 'bit-form'), |
| 189 |
8 => __('A PHP extension stopped the file upload.', 'bit-form'), |
| 190 |
]; |
| 191 |
return $errors[$code]; |
| 192 |
} |
| 193 |
|
| 194 |
public static function fileCopy($tmpdir, $destinationDir, $file) |
| 195 |
{ |
| 196 |
$tmpBase = realpath($tmpdir); |
| 197 |
$destBase = realpath($destinationDir); |
| 198 |
if (false === $tmpBase || false === $destBase) { |
| 199 |
Log::debug_log([ |
| 200 |
'message' => 'FileHandler::fileCopy base path invalid', |
| 201 |
'tmpdir' => $tmpdir, |
| 202 |
'destinationDir' => $destinationDir, |
| 203 |
]); |
| 204 |
return; |
| 205 |
} |
| 206 |
|
| 207 |
$safeFile = is_string($file) ? trim($file) : ''; |
| 208 |
if ('' === $safeFile) { |
| 209 |
return; |
| 210 |
} |
| 211 |
|
| 212 |
$candidate = $tmpBase . DIRECTORY_SEPARATOR . $safeFile; |
| 213 |
$resolved = realpath($candidate); |
| 214 |
if (false === $resolved || 0 !== strpos($resolved, $tmpBase . DIRECTORY_SEPARATOR)) { |
| 215 |
Log::debug_log([ |
| 216 |
'message' => 'FileHandler::fileCopy blocked path traversal', |
| 217 |
'file' => $file, |
| 218 |
'resolved' => $resolved, |
| 219 |
'tmpBase' => $tmpBase, |
| 220 |
]); |
| 221 |
return; |
| 222 |
} |
| 223 |
if (!is_readable($resolved)) { |
| 224 |
return; |
| 225 |
} |
| 226 |
|
| 227 |
$newFile = $destBase . DIRECTORY_SEPARATOR . basename($resolved); |
| 228 |
copy($resolved, $newFile); |
| 229 |
} |
| 230 |
|
| 231 |
public static function tempDirToUploadDir($submitted_data, $fields, $formId, $entryID) |
| 232 |
{ |
| 233 |
$upload_dir = wp_upload_dir(); |
| 234 |
$tempDir = $upload_dir['basedir'] . '/bitforms/temp'; |
| 235 |
$destinationDir = self::getEntriesFileUploadDir($formId, $entryID) . DIRECTORY_SEPARATOR; |
| 236 |
self::createIndexFile($destinationDir); |
| 237 |
|
| 238 |
foreach ($submitted_data as $key => $data) { |
| 239 |
if (isset($fields[$key]) && 'advanced-file-up' === $fields[$key]['type']) { |
| 240 |
$files = $data; |
| 241 |
$fldData = $submitted_data[$key]; |
| 242 |
$files = explode(',', $fldData); |
| 243 |
if (is_array($files) && count($files) > 0) { |
| 244 |
foreach ($files as $file) { |
| 245 |
self::fileCopy($tempDir, $destinationDir, trim($file)); |
| 246 |
} |
| 247 |
} else { |
| 248 |
self::fileCopy($tempDir, $destinationDir, trim($files)); |
| 249 |
} |
| 250 |
if (!empty($files)) { |
| 251 |
$submitted_data[$key] = $files; |
| 252 |
} |
| 253 |
} |
| 254 |
} |
| 255 |
$tempBase = realpath($tempDir); |
| 256 |
if (false !== $tempBase) { |
| 257 |
$tmpFiles = glob($tempBase . DIRECTORY_SEPARATOR . '*'); |
| 258 |
foreach ((array) $tmpFiles as $tmpFile) { |
| 259 |
$resolved = realpath($tmpFile); |
| 260 |
if (false !== $resolved && 0 === strpos($resolved, $tempBase . DIRECTORY_SEPARATOR)) { |
| 261 |
wp_delete_file($resolved); |
| 262 |
} |
| 263 |
} |
| 264 |
} |
| 265 |
|
| 266 |
return $submitted_data; |
| 267 |
} |
| 268 |
|
| 269 |
private function getByteSizeByUnit($sizeString) |
| 270 |
{ |
| 271 |
// split 2MB into 2 and MB |
| 272 |
$size = preg_replace('/[^0-9\.]/', '', $sizeString); |
| 273 |
$unit = preg_replace('/[^a-zA-Z]/', '', $sizeString); |
| 274 |
$unit = strtolower($unit); |
| 275 |
if ('kb' === $unit) { |
| 276 |
return $size * 1024; |
| 277 |
} elseif ('mb' === $unit) { |
| 278 |
return $size * 1024 * 1024; |
| 279 |
} elseif ('gb' === $unit) { |
| 280 |
return $size * 1024 * 1024 * 1024; |
| 281 |
} else { |
| 282 |
return $size; |
| 283 |
} |
| 284 |
} |
| 285 |
|
| 286 |
public function validation($field_key, $file_details, $form_id) |
| 287 |
{ |
| 288 |
if (!function_exists('wp_check_filetype_and_ext')) { |
| 289 |
require_once ABSPATH . 'wp-admin/includes/file.php'; |
| 290 |
} |
| 291 |
|
| 292 |
$formManager = FormManager::getInstance($form_id); |
| 293 |
$form_contents = $formManager->getFormContent(); |
| 294 |
$field_content_details = $form_contents->fields; |
| 295 |
$fieldDetail = $field_content_details->{$field_key}; |
| 296 |
$fieldType = $fieldDetail->typ; |
| 297 |
$maxSizeDetails = []; |
| 298 |
$allowFileTypes = []; |
| 299 |
$maxSize = null; |
| 300 |
if ('file-up' === $fieldType) { |
| 301 |
$allowFileTypes = !empty($fieldDetail->config->allowedFileType) ? $fieldDetail->config->allowedFileType : []; |
| 302 |
if (!empty($fieldDetail->config->allowMaxSize)) { |
| 303 |
if (!empty($fieldDetail->config->maxSize)) { |
| 304 |
$maxSizeDetails['maxSize'] = $fieldDetail->config->maxSize . $fieldDetail->config->sizeUnit; |
| 305 |
} |
| 306 |
if (!empty($fieldDetail->config->isItTotalMax)) { |
| 307 |
$maxSizeDetails['maxTotalFileSize'] = $fieldDetail->config->maxSize . $fieldDetail->config->sizeUnit; |
| 308 |
} |
| 309 |
} |
| 310 |
if (!empty($allowFileTypes)) { |
| 311 |
$allowFileTypes = explode(',', $allowFileTypes); |
| 312 |
} |
| 313 |
} elseif ('advanced-file-up' === $fieldType) { |
| 314 |
$allowFileTypes = !empty($fieldDetail->config->allowFileTypeValidation) ? $fieldDetail->config->acceptedFileTypes : []; |
| 315 |
if (!empty($fieldDetail->config->allowFileSizeValidation)) { |
| 316 |
if (!empty($fieldDetail->config->maxFileSize)) { |
| 317 |
$maxSizeDetails['maxSize'] = $fieldDetail->config->maxFileSize; |
| 318 |
} |
| 319 |
if (!empty($fieldDetail->config->maxTotalFileSize)) { |
| 320 |
$maxSizeDetails['maxTotalFileSize'] = $fieldDetail->config->maxTotalFileSize; |
| 321 |
} |
| 322 |
} |
| 323 |
} |
| 324 |
if (!empty($maxSizeDetails['maxSize'])) { |
| 325 |
$maxSize = $this->getByteSizeByUnit($maxSizeDetails['maxSize']); |
| 326 |
} |
| 327 |
$maxTotalFileSize = null; |
| 328 |
if (!empty($maxSizeDetails['maxTotalFileSize'])) { |
| 329 |
$maxTotalFileSize = $this->getByteSizeByUnit($maxSizeDetails['maxTotalFileSize']); |
| 330 |
} |
| 331 |
|
| 332 |
if ($formManager->isRepeatedField($field_key)) { |
| 333 |
foreach ($file_details['name'] as $rowIndex => $file) { |
| 334 |
if (!empty($file)) { |
| 335 |
$fileDetails = [ |
| 336 |
'name' => $file, |
| 337 |
'type' => $file_details['type'][$rowIndex], |
| 338 |
'tmp_name' => $file_details['tmp_name'][$rowIndex], |
| 339 |
'error' => $file_details['error'][$rowIndex], |
| 340 |
'size' => $file_details['size'][$rowIndex], |
| 341 |
]; |
| 342 |
$validateState = $this->validateFileInfo($fieldType, $fileDetails, $allowFileTypes, $maxSize, $maxTotalFileSize); |
| 343 |
if (!empty($validateState) && !empty($validateState['message'])) { |
| 344 |
return $validateState; |
| 345 |
} |
| 346 |
} |
| 347 |
} |
| 348 |
} else { |
| 349 |
return $this->validateFileInfo($fieldType, $file_details, $allowFileTypes, $maxSize, $maxTotalFileSize); |
| 350 |
} |
| 351 |
return []; |
| 352 |
} |
| 353 |
|
| 354 |
private function validateFileInfo($fieldType, $file_details, $allowFileTypes, $maxSize, $maxTotalFileSize) |
| 355 |
{ |
| 356 |
$errorMessage = [ |
| 357 |
'message' => '', |
| 358 |
'error_type' => '', |
| 359 |
]; |
| 360 |
if (is_array($file_details['name'])) { |
| 361 |
$totalSize = 0; |
| 362 |
foreach ($file_details['name'] as $key => $file) { |
| 363 |
if (!empty($file)) { |
| 364 |
$fileInfo = [ |
| 365 |
'name' => $file, |
| 366 |
'type' => $file_details['type'][$key], |
| 367 |
'tmp_name' => $file_details['tmp_name'][$key], |
| 368 |
'error' => $file_details['error'][$key], |
| 369 |
'size' => $file_details['size'][$key], |
| 370 |
]; |
| 371 |
$totalSize += $fileInfo['size']; |
| 372 |
$validateState = $this->validateSingleFile($fieldType, $fileInfo, $allowFileTypes, $maxSize); |
| 373 |
if (!empty($validateState)) { |
| 374 |
return $validateState; |
| 375 |
} |
| 376 |
} |
| 377 |
} |
| 378 |
if (isset($maxTotalFileSize) && !is_null($maxTotalFileSize) && $totalSize > $maxTotalFileSize) { |
| 379 |
$errorMessage['message'] = __('Total File size is too large', 'bit-form'); |
| 380 |
$errorMessage['error_type'] = 'file_size_error'; |
| 381 |
return $errorMessage; |
| 382 |
} |
| 383 |
} else { |
| 384 |
$validateState = $this->validateSingleFile($fieldType, $file_details, $allowFileTypes, $maxSize); |
| 385 |
if (!empty($validateState)) { |
| 386 |
return $validateState; |
| 387 |
} |
| 388 |
} |
| 389 |
|
| 390 |
return $errorMessage; |
| 391 |
} |
| 392 |
|
| 393 |
private function validateSingleFile($fieldType, &$file, $allowTypes, $maxSize = null) |
| 394 |
{ |
| 395 |
// 0) Basic sanity & transport integrity |
| 396 |
if (!is_array($file) || empty($file['tmp_name'])) { |
| 397 |
// return ['message' => __('No file uploaded.', 'bit-form'), 'error_type' => 'file_missing']; |
| 398 |
return null; |
| 399 |
} |
| 400 |
if (!isset($file['error']) || UPLOAD_ERR_OK !== (int)$file['error']) { |
| 401 |
return ['message' => __('Upload failed', 'bit-form'), 'error_type' => 'file_upload_error']; |
| 402 |
} |
| 403 |
if (!is_uploaded_file($file['tmp_name'])) { |
| 404 |
return ['message' => __('Untrusted upload source', 'bit-form'), 'error_type' => 'file_upload_error']; |
| 405 |
} |
| 406 |
if (!is_file($file['tmp_name']) || !is_readable($file['tmp_name'])) { |
| 407 |
return ['message' => __('Temporary file not accessible', 'bit-form'), 'error_type' => 'file_upload_error']; |
| 408 |
} |
| 409 |
|
| 410 |
$fileName = sanitize_file_name((string)($file['name'] ?? '')); |
| 411 |
if ('' === $fileName) { |
| 412 |
return ['message' => __('Empty filename', 'bit-form'), 'error_type' => 'file_type_error']; |
| 413 |
} |
| 414 |
|
| 415 |
// 1) Enforce max size (header + actual) |
| 416 |
$onDiskSize = @filesize($file['tmp_name']); |
| 417 |
if (false === $onDiskSize) { |
| 418 |
return ['message' => __('Cannot read file size', 'bit-form'), 'error_type' => 'file_upload_error']; |
| 419 |
} |
| 420 |
if (!empty($maxSize) && $onDiskSize > $maxSize) { |
| 421 |
return ['message' => __('File size is too large', 'bit-form'), 'error_type' => 'file_size_error']; |
| 422 |
} |
| 423 |
|
| 424 |
// 2) Determine ext + MIME using WP + finfo |
| 425 |
$wpCheck = wp_check_filetype_and_ext($file['tmp_name'], $fileName); // ['ext'=>'jpg','type'=>'image/jpeg'] |
| 426 |
$fileExtension = strtolower((string)(empty($wpCheck['ext']) ? pathinfo($fileName, PATHINFO_EXTENSION) : $wpCheck['ext'])); |
| 427 |
$wpExt = strtolower((string)(empty($wpCheck['ext']) ? $fileExtension : $wpCheck['ext'])); |
| 428 |
$wpType = strtolower((string)($wpCheck['type'] ?? '')); |
| 429 |
$fi = function_exists('finfo_open') ? @finfo_open(FILEINFO_MIME_TYPE) : false; |
| 430 |
$detectedMime = $fi ? @finfo_file($fi, $file['tmp_name']) : false; |
| 431 |
if ($fi) { |
| 432 |
@finfo_close($fi); |
| 433 |
} |
| 434 |
if (!$detectedMime && function_exists('mime_content_type')) { |
| 435 |
$detectedMime = @mime_content_type($file['tmp_name']); |
| 436 |
} |
| 437 |
if (!$detectedMime) { |
| 438 |
$detectedMime = '' !== $wpType ? $wpType : 'application/octet-stream'; |
| 439 |
} |
| 440 |
$detectedMime = strtolower(trim($detectedMime)); |
| 441 |
|
| 442 |
// Hard-block risky types regardless |
| 443 |
// 3) Block obvious executable types regardless of allow list |
| 444 |
$disallowedMimes = apply_filters('bitform_filter_upload_disallowed_mimes', [ |
| 445 |
'application/x-php', |
| 446 |
'text/x-php', |
| 447 |
'application/x-msdownload', |
| 448 |
'application/x-msdos-program', |
| 449 |
'application/x-sh', |
| 450 |
'application/x-csh', |
| 451 |
'text/x-shellscript', |
| 452 |
'application/java-archive' |
| 453 |
]); |
| 454 |
$denyExt = apply_filters('bitform_filter_upload_denied_extensions', ['php', 'phtml', 'phar', 'htaccess', 'html', 'js', 'exe', 'sh', 'bat', 'cmd']); |
| 455 |
if (in_array($detectedMime, $disallowedMimes, true) || in_array($fileExtension, $denyExt, true)) { |
| 456 |
return ['message' => __('This file type is not allowed', 'bit-form'), 'error_type' => 'file_type_error']; |
| 457 |
} |
| 458 |
|
| 459 |
// 4) Normalize allowlist: support both extensions (.jpg or jpg) and MIME types |
| 460 |
// --- ALLOWLIST NORMALIZATION (extensions + MIME) --- |
| 461 |
$normalizedAllow = array_values(array_unique(array_map(static function ($t) { |
| 462 |
return strtolower(trim((string)$t)); |
| 463 |
}, (array)$allowTypes))); |
| 464 |
|
| 465 |
$allowExts = []; |
| 466 |
$allowMimes = []; |
| 467 |
foreach ($normalizedAllow as $t) { |
| 468 |
if ('' === $t) { |
| 469 |
continue; |
| 470 |
} |
| 471 |
if (false !== strpos($t, '/')) { |
| 472 |
// looks like a MIME |
| 473 |
$allowMimes[] = $t; |
| 474 |
} else { |
| 475 |
// extension: may include leading dot; normalize without dot |
| 476 |
$allowExts[] = ltrim($t, '.'); |
| 477 |
} |
| 478 |
} |
| 479 |
|
| 480 |
$allowExts = array_values(array_unique($allowExts)); |
| 481 |
$allowMimes = array_values(array_unique($allowMimes)); |
| 482 |
|
| 483 |
$hasAllowlist = (!empty($allowExts) || !empty($allowMimes)); |
| 484 |
$extMatch = in_array($fileExtension, $allowExts, true); |
| 485 |
$mimeMatch = in_array($detectedMime, $allowMimes, true); |
| 486 |
|
| 487 |
// 5) Require BOTH a legit WP mapping AND a match to the allowlist |
| 488 |
$wpOk = ('' !== $wpExt && '' !== $wpType); |
| 489 |
|
| 490 |
if ($hasAllowlist) { |
| 491 |
if (!($extMatch || $mimeMatch)) { |
| 492 |
return ['message' => __('File type is not allowed', 'bit-form'), 'error_type' => 'file_type_error']; |
| 493 |
} |
| 494 |
} else { |
| 495 |
if (!$wpOk) { |
| 496 |
return ['message' => __('File type is not allowed', 'bit-form'), 'error_type' => 'file_type_error']; |
| 497 |
} |
| 498 |
} |
| 499 |
|
| 500 |
// 5) Special SVG handling (by MIME, not just extension) |
| 501 |
if ('svg' === $fileExtension || 'image/svg+xml' === $detectedMime || 'image/svg+xml' === $wpType) { |
| 502 |
if ('image/svg+xml' !== $detectedMime) { |
| 503 |
return ['message' => __('Invalid SVG', 'bit-form'), 'error_type' => 'file_type_error']; |
| 504 |
} |
| 505 |
|
| 506 |
$dirty = file_get_contents($file['tmp_name']); |
| 507 |
$svg_sanitizer = new Sanitizer(); |
| 508 |
$clean = $svg_sanitizer->sanitize($dirty); |
| 509 |
if (false === $clean) { |
| 510 |
return ['message' => __('SVG file is not valid', 'bit-form'), 'error_type' => 'file_type_error']; |
| 511 |
} |
| 512 |
file_put_contents($file['tmp_name'], $clean, LOCK_EX); |
| 513 |
// Re-check size post-sanitize |
| 514 |
if (!empty($maxSize) && filesize($file['tmp_name']) > $maxSize) { |
| 515 |
return ['message' => __('File size is too large after sanitation', 'bit-form'), 'error_type' => 'file_size_error']; |
| 516 |
} |
| 517 |
} |
| 518 |
|
| 519 |
if ('pdf' === $fileExtension || 'application/pdf' === $detectedMime || 'application/pdf' === $wpType) { |
| 520 |
$blockedList = [ |
| 521 |
'/\/JS\b/', |
| 522 |
'/\/JavaScript\b/', |
| 523 |
'/eval\(/i', |
| 524 |
'/app\.alert/i', |
| 525 |
'/console\.log\b/i', |
| 526 |
'/document\.write\b/i', |
| 527 |
|
| 528 |
'/\/GoToR\b/i', |
| 529 |
'/\/Launch\b/i', |
| 530 |
|
| 531 |
'/\/EmbeddedFile\b/i', |
| 532 |
'/\/EmbeddedFiles\b/i', |
| 533 |
'/\/Filespec\b/i', |
| 534 |
'/\/FileAttachment\b/i', |
| 535 |
|
| 536 |
'/\/SubmitForm\b/i', |
| 537 |
'/\/ResetForm\b/i', |
| 538 |
'/\/ImportData\b/i', |
| 539 |
|
| 540 |
'/\/RichMedia\b/i', |
| 541 |
]; |
| 542 |
|
| 543 |
$pdfContent = file_get_contents($file['tmp_name']); |
| 544 |
foreach ($blockedList as $blockedKeyWrd) { |
| 545 |
if (preg_match($blockedKeyWrd, $pdfContent)) { |
| 546 |
return ['message' => __('Invalid file', 'bit-form'), 'error_type' => 'file_type_error']; |
| 547 |
} |
| 548 |
} |
| 549 |
} |
| 550 |
|
| 551 |
// --- Allow developer to make a final decision override (optional) --- |
| 552 |
$final = apply_filters('bitform_filter_upload_allow_file', true, [ |
| 553 |
'file_name' => $fileName, |
| 554 |
'extension' => $fileExtension, |
| 555 |
'detected_mime' => $detectedMime, |
| 556 |
'wp_ext' => $wpExt, |
| 557 |
'wp_type' => $wpType, |
| 558 |
'allow_exts' => $allowExts, |
| 559 |
'allow_mimes' => $allowMimes, |
| 560 |
'has_allowlist' => $hasAllowlist, |
| 561 |
]); |
| 562 |
if (true !== $final) { |
| 563 |
// If a dev returns a WP_Error, you could extract message/type; here we just block. |
| 564 |
return ['message' => __('File not allowed by policy', 'bit-form'), 'error_type' => 'file_policy_block']; |
| 565 |
} |
| 566 |
return null; // success |
| 567 |
} |
| 568 |
|
| 569 |
public static function deleteIsFileExists($path) |
| 570 |
{ |
| 571 |
if (file_exists($path)) { |
| 572 |
wp_delete_file($path); |
| 573 |
} |
| 574 |
} |
| 575 |
|
| 576 |
public static function getEntriesFileUploadDir($form_id, $entry_id) |
| 577 |
{ |
| 578 |
$uploadDir = rtrim(BITFORMS_UPLOAD_DIR, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR . $form_id . DIRECTORY_SEPARATOR; |
| 579 |
$encrypted_directoryId = Helpers::getEncryptedEntryId($entry_id); |
| 580 |
$encryptedDirectory = $uploadDir . $encrypted_directoryId; |
| 581 |
if (is_dir($encryptedDirectory)) { |
| 582 |
return $encryptedDirectory; |
| 583 |
} |
| 584 |
$oldEntriesFileUploadDir = Helpers::getOldEntriesFileUploadDir($uploadDir, $entry_id); |
| 585 |
if (!empty($oldEntriesFileUploadDir) && is_dir($oldEntriesFileUploadDir)) { |
| 586 |
return $oldEntriesFileUploadDir; |
| 587 |
} |
| 588 |
return $encryptedDirectory; |
| 589 |
} |
| 590 |
|
| 591 |
private static function replaceDocumentRoot($path) |
| 592 |
{ |
| 593 |
$uploadDir = wp_upload_dir(); |
| 594 |
$basedir = wp_normalize_path(rtrim($uploadDir['basedir'], '/\\')); |
| 595 |
$baseurl = rtrim($uploadDir['baseurl'], '/'); |
| 596 |
$normalPath = wp_normalize_path($path); |
| 597 |
|
| 598 |
if (0 === strpos($normalPath, $basedir . '/') || $normalPath === $basedir) { |
| 599 |
return $baseurl . substr($normalPath, strlen($basedir)); |
| 600 |
} |
| 601 |
|
| 602 |
// Fallback: path outside uploads dir — strip ABSPATH and prepend home URL. |
| 603 |
return home_url(ltrim(str_replace(wp_normalize_path(ABSPATH), '', $normalPath), '/')); |
| 604 |
} |
| 605 |
|
| 606 |
public static function getEntriesFileUploadURL($form_id, $entry_id) |
| 607 |
{ |
| 608 |
$documentRoot = self::getEntriesFileUploadDir($form_id, $entry_id); |
| 609 |
$url = self::replaceDocumentRoot($documentRoot); |
| 610 |
return $url; |
| 611 |
} |
| 612 |
|
| 613 |
public static function createIndexFile($directory) |
| 614 |
{ |
| 615 |
if (wp_mkdir_p($directory)) { |
| 616 |
$indexFilePath = rtrim($directory, '/') . '/index.php'; |
| 617 |
if (!file_exists($indexFilePath)) { |
| 618 |
try { |
| 619 |
if (false === self::writeFile($indexFilePath, "<?php\n// No direct access allowed.")) { |
| 620 |
throw new \Exception("Failed to create index.php in $directory"); |
| 621 |
} |
| 622 |
} catch (\Exception $e) { |
| 623 |
Log::debug_log('File creation Failed:' . $e->getMessage()); // Log the error for debugging |
| 624 |
} |
| 625 |
} |
| 626 |
} |
| 627 |
return false; |
| 628 |
} |
| 629 |
|
| 630 |
/** |
| 631 |
* Initialise and return the WP_Filesystem abstraction layer. |
| 632 |
* |
| 633 |
* @return WP_Filesystem_Base|false |
| 634 |
*/ |
| 635 |
private static function initWpFilesystem() |
| 636 |
{ |
| 637 |
global $wp_filesystem; |
| 638 |
if (empty($wp_filesystem)) { |
| 639 |
require_once ABSPATH . 'wp-admin/includes/file.php'; |
| 640 |
WP_Filesystem(); |
| 641 |
} |
| 642 |
return $wp_filesystem; |
| 643 |
} |
| 644 |
|
| 645 |
/** |
| 646 |
* Write (overwrite) content to a file using WP_Filesystem. |
| 647 |
* |
| 648 |
* @param string $filePath Absolute path to the file. |
| 649 |
* @param string $content Content to write. |
| 650 |
* @return bool True on success, false on failure. |
| 651 |
*/ |
| 652 |
public static function writeFile($filePath, $content) |
| 653 |
{ |
| 654 |
$fs = self::initWpFilesystem(); |
| 655 |
if ($fs) { |
| 656 |
return $fs->put_contents($filePath, $content, FS_CHMOD_FILE); |
| 657 |
} |
| 658 |
// Fallback: file_put_contents is acceptable when WP_Filesystem is unavailable. |
| 659 |
return false !== file_put_contents($filePath, $content); |
| 660 |
} |
| 661 |
|
| 662 |
/** |
| 663 |
* Append content to a file using WP_Filesystem. |
| 664 |
* WP_Filesystem has no native append; we read + concatenate + write. |
| 665 |
* |
| 666 |
* @param string $filePath Absolute path to the file. |
| 667 |
* @param string $content Content to append. |
| 668 |
* @return bool True on success, false on failure. |
| 669 |
*/ |
| 670 |
public static function appendFile($filePath, $content) |
| 671 |
{ |
| 672 |
$fs = self::initWpFilesystem(); |
| 673 |
if ($fs) { |
| 674 |
$existing = $fs->exists($filePath) ? (string) $fs->get_contents($filePath) : ''; |
| 675 |
return $fs->put_contents($filePath, $existing . $content, FS_CHMOD_FILE); |
| 676 |
} |
| 677 |
// Fallback: file_put_contents is acceptable when WP_Filesystem is unavailable. |
| 678 |
return false !== file_put_contents($filePath, $content, FILE_APPEND | LOCK_EX); |
| 679 |
} |
| 680 |
|
| 681 |
/** |
| 682 |
* Read and return the full content of a file using WP_Filesystem. |
| 683 |
* |
| 684 |
* @param string $filePath Absolute path to the file. |
| 685 |
* @return string File contents, or empty string if unreadable. |
| 686 |
*/ |
| 687 |
public static function readFile($filePath) |
| 688 |
{ |
| 689 |
$fs = self::initWpFilesystem(); |
| 690 |
if ($fs && $fs->exists($filePath)) { |
| 691 |
$content = $fs->get_contents($filePath); |
| 692 |
return false !== $content ? $content : ''; |
| 693 |
} |
| 694 |
// Fallback. |
| 695 |
if (file_exists($filePath)) { |
| 696 |
$content = file_get_contents($filePath); |
| 697 |
return false !== $content ? $content : ''; |
| 698 |
} |
| 699 |
return ''; |
| 700 |
} |
| 701 |
|
| 702 |
public static function processRepeaterAttachment($repeaterKey, $fileKey, $fieldValue, $basePath, &$attachments) |
| 703 |
{ |
| 704 |
if (!isset($fieldValue[$repeaterKey]) || !is_array($fieldValue[$repeaterKey])) { |
| 705 |
return; |
| 706 |
} |
| 707 |
|
| 708 |
foreach ($fieldValue[$repeaterKey] as $repeaterRow) { |
| 709 |
if (!isset($repeaterRow[$fileKey]) || empty($repeaterRow[$fileKey])) { |
| 710 |
continue; |
| 711 |
} |
| 712 |
|
| 713 |
$fileValue = $repeaterRow[$fileKey]; |
| 714 |
self::addAttachmentFiles($fileValue, $basePath, $attachments); |
| 715 |
} |
| 716 |
} |
| 717 |
|
| 718 |
public static function processRegularAttachment($fileKey, $fieldValue, $basePath, &$attachments) |
| 719 |
{ |
| 720 |
if (!isset($fieldValue[$fileKey]) || empty($fieldValue[$fileKey])) { |
| 721 |
return; |
| 722 |
} |
| 723 |
|
| 724 |
$fileValue = $fieldValue[$fileKey]; |
| 725 |
self::addAttachmentFiles($fileValue, $basePath, $attachments); |
| 726 |
} |
| 727 |
|
| 728 |
private static function addAttachmentFiles($fileValue, $basePath, &$attachments) |
| 729 |
{ |
| 730 |
$baseResolved = realpath($basePath); |
| 731 |
if (false === $baseResolved) { |
| 732 |
Log::debug_log([ |
| 733 |
'message' => 'FileHandler::addAttachmentFiles base path invalid', |
| 734 |
'basePath' => $basePath, |
| 735 |
]); |
| 736 |
return; |
| 737 |
} |
| 738 |
|
| 739 |
$addFile = static function ($candidate) use ($baseResolved, &$attachments) { |
| 740 |
$safeFile = is_string($candidate) ? trim($candidate) : ''; |
| 741 |
if ('' === $safeFile) { |
| 742 |
return; |
| 743 |
} |
| 744 |
$path = $baseResolved . DIRECTORY_SEPARATOR . $safeFile; |
| 745 |
$resolved = realpath($path); |
| 746 |
if (false === $resolved || 0 !== strpos($resolved, $baseResolved . DIRECTORY_SEPARATOR)) { |
| 747 |
Log::debug_log([ |
| 748 |
'message' => 'FileHandler::addAttachmentFiles blocked path traversal', |
| 749 |
'file' => $candidate, |
| 750 |
'resolved' => $resolved, |
| 751 |
'baseResolved' => $baseResolved, |
| 752 |
]); |
| 753 |
return; |
| 754 |
} |
| 755 |
if (is_readable($resolved)) { |
| 756 |
$attachments[] = $resolved; |
| 757 |
} |
| 758 |
}; |
| 759 |
|
| 760 |
if (is_array($fileValue)) { |
| 761 |
foreach ($fileValue as $singleFile) { |
| 762 |
$addFile($singleFile); |
| 763 |
} |
| 764 |
return; |
| 765 |
} |
| 766 |
|
| 767 |
$addFile($fileValue); |
| 768 |
} |
| 769 |
|
| 770 |
/** |
| 771 |
* Return file type by checking with mime type |
| 772 |
* @param string $mime |
| 773 |
* @return string |
| 774 |
*/ |
| 775 |
public static function getFileTypeByMime(string $mime) |
| 776 |
{ |
| 777 |
$mime = strtolower($mime); |
| 778 |
|
| 779 |
if (preg_match('/^image\//', $mime)) { |
| 780 |
return 'image'; |
| 781 |
} |
| 782 |
|
| 783 |
$compressed = [ |
| 784 |
'application/zip', |
| 785 |
'application/x-rar-compressed', |
| 786 |
'application/x-7z-compressed', |
| 787 |
'application/gzip', |
| 788 |
'application/x-tar', |
| 789 |
'application/x-gtar', |
| 790 |
'application/x-bzip2', |
| 791 |
'application/x-archive', |
| 792 |
'application/vnd.debian.binary-package', |
| 793 |
]; |
| 794 |
if (in_array($mime, $compressed, true)) { |
| 795 |
return 'compressed'; |
| 796 |
} |
| 797 |
|
| 798 |
$presentation = [ |
| 799 |
'application/vnd.ms-powerpoint', |
| 800 |
'application/vnd.openxmlformats-officedocument.presentationml.presentation', |
| 801 |
'application/vnd.oasis.opendocument.presentation', |
| 802 |
'application/vnd.apple.keynote', |
| 803 |
]; |
| 804 |
if (in_array($mime, $presentation, true)) { |
| 805 |
return 'presentation'; |
| 806 |
} |
| 807 |
|
| 808 |
$document = [ |
| 809 |
'application/pdf', |
| 810 |
'application/msword', |
| 811 |
'application/vnd.openxmlformats-officedocument.wordprocessingml.document', |
| 812 |
'application/rtf', |
| 813 |
'text/plain', |
| 814 |
'application/vnd.oasis.opendocument.text', |
| 815 |
'application/x-tex', |
| 816 |
'text/rtf', |
| 817 |
]; |
| 818 |
if (in_array($mime, $document, true)) { |
| 819 |
return 'document'; |
| 820 |
} |
| 821 |
|
| 822 |
$data = [ |
| 823 |
'text/csv', |
| 824 |
'application/xml', |
| 825 |
'text/xml', |
| 826 |
'application/sql', |
| 827 |
'application/vnd.ms-excel', |
| 828 |
'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', |
| 829 |
'application/x-sqlite3', |
| 830 |
'application/octet-stream', // generic binary (could be db files) |
| 831 |
]; |
| 832 |
if (in_array($mime, $data, true)) { |
| 833 |
return 'data'; |
| 834 |
} |
| 835 |
|
| 836 |
if (preg_match('/^audio\//', $mime)) { |
| 837 |
return 'audio'; |
| 838 |
} |
| 839 |
|
| 840 |
if (preg_match('/^video\//', $mime)) { |
| 841 |
return 'video'; |
| 842 |
} |
| 843 |
|
| 844 |
return 'other'; |
| 845 |
} |
| 846 |
|
| 847 |
/** |
| 848 |
* Return file type by checking with extension |
| 849 |
* @param string $extension |
| 850 |
* @return string |
| 851 |
*/ |
| 852 |
public static function getFileTypeByExtension($extension) |
| 853 |
{ |
| 854 |
switch (strtolower($extension)) { |
| 855 |
case 'xbm': |
| 856 |
case 'tif': |
| 857 |
case 'pjp': |
| 858 |
case 'pjpeg': |
| 859 |
case 'svgz': |
| 860 |
case 'jpg': |
| 861 |
case 'jpeg': |
| 862 |
case 'ico': |
| 863 |
case 'tiff': |
| 864 |
case 'gif': |
| 865 |
case 'svg': |
| 866 |
case 'bmp': |
| 867 |
case 'png': |
| 868 |
case 'jfif': |
| 869 |
case 'webp': |
| 870 |
return 'image'; |
| 871 |
|
| 872 |
case '7z': |
| 873 |
case 'arj': |
| 874 |
case 'deb': |
| 875 |
case 'pkg': |
| 876 |
case 'rar': |
| 877 |
case 'rpm': |
| 878 |
case 'gz': |
| 879 |
case 'z': |
| 880 |
case 'zip': |
| 881 |
return 'compressed'; |
| 882 |
|
| 883 |
case 'key': |
| 884 |
case 'odp': |
| 885 |
case 'pps': |
| 886 |
case 'ppt': |
| 887 |
case 'pptx': |
| 888 |
return 'presentation'; |
| 889 |
|
| 890 |
case '_rf_': |
| 891 |
case 'doc': |
| 892 |
case 'docx': |
| 893 |
case 'odt': |
| 894 |
case 'pdf': |
| 895 |
case 'rtf': |
| 896 |
case 'tex': |
| 897 |
case 'txt': |
| 898 |
case 'wks': |
| 899 |
case 'wps': |
| 900 |
case 'wpd': |
| 901 |
return 'document'; |
| 902 |
|
| 903 |
case 'csv': |
| 904 |
case 'dat': |
| 905 |
case 'db': |
| 906 |
case 'dbf': |
| 907 |
case 'log': |
| 908 |
case 'mdb': |
| 909 |
case 'sav': |
| 910 |
case 'sql': |
| 911 |
case 'tar': |
| 912 |
case 'sqlite': |
| 913 |
case 'xml': |
| 914 |
return 'data'; |
| 915 |
|
| 916 |
case 'opus': |
| 917 |
case 'flac': |
| 918 |
case 'webm': |
| 919 |
case 'weba': |
| 920 |
case 'wav': |
| 921 |
case 'ogg': |
| 922 |
case 'm4a': |
| 923 |
case 'mp3': |
| 924 |
case 'oga': |
| 925 |
case 'mid': |
| 926 |
case 'amr': |
| 927 |
case 'aiff': |
| 928 |
case 'wma': |
| 929 |
case 'au': |
| 930 |
case 'acc': |
| 931 |
case 'wpl': |
| 932 |
return 'audio'; |
| 933 |
|
| 934 |
case 'ogm': |
| 935 |
case 'wmv': |
| 936 |
case 'mpg': |
| 937 |
case 'ogv': |
| 938 |
case 'mov': |
| 939 |
case 'asx': |
| 940 |
case 'mpeg': |
| 941 |
case 'mp4': |
| 942 |
case 'm4v': |
| 943 |
case 'avi': |
| 944 |
case '3gp': |
| 945 |
case 'flv': |
| 946 |
case 'mkv': |
| 947 |
case 'swf': |
| 948 |
return 'video'; |
| 949 |
default: |
| 950 |
return 'other'; |
| 951 |
} |
| 952 |
} |
| 953 |
} |
| 954 |
|
