Code Coverage |
||||||||||
Lines |
Functions and Methods |
Classes and Traits |
||||||||
| Total | |
0.00% |
0 / 167 |
|
0.00% |
0 / 9 |
CRAP | |
0.00% |
0 / 1 |
| vp_get_real_file_path | |
0.00% |
0 / 9 |
|
0.00% |
0 / 1 |
56 | |||
| vp_is_interesting_file | |
0.00% |
0 / 2 |
|
0.00% |
0 / 1 |
2 | |||
| split_file_to_php_html | |
0.00% |
0 / 4 |
|
0.00% |
0 / 1 |
6 | |||
| split_to_php_html | |
0.00% |
0 / 25 |
|
0.00% |
0 / 1 |
182 | |||
| add_text_to_parsed | |
0.00% |
0 / 16 |
|
0.00% |
0 / 1 |
56 | |||
| vp_scan_file | |
0.00% |
0 / 67 |
|
0.00% |
0 / 1 |
1260 | |||
| VP_FileScan | |
0.00% |
0 / 43 |
|
0.00% |
0 / 3 |
506 | |
0.00% |
0 / 1 |
| __construct | |
0.00% |
0 / 4 |
|
0.00% |
0 / 1 |
6 | |||
| get_files | |
0.00% |
0 / 8 |
|
0.00% |
0 / 1 |
12 | |||
| _scan_files | |
0.00% |
0 / 31 |
|
0.00% |
0 / 1 |
306 | |||
| 1 | <?php |
| 2 | // don't call the file directly |
| 3 | defined( 'ABSPATH' ) || die( 0 ); |
| 4 | |
| 5 | class VP_FileScan { |
| 6 | var $path; |
| 7 | var $last_dir = null; |
| 8 | var $offset = 0; |
| 9 | var $ignore_symlinks = false; |
| 10 | |
| 11 | function __construct( $path, $ignore_symlinks = false ) { |
| 12 | if ( is_dir( $path ) ) |
| 13 | $this->last_dir = $this->path = @realpath( $path ); |
| 14 | else |
| 15 | $this->last_dir = $this->path = dirname( @realpath( $path ) ); |
| 16 | $this->ignore_symlinks = $ignore_symlinks; |
| 17 | } |
| 18 | |
| 19 | function get_files( $limit = 100 ) { |
| 20 | $files = array(); |
| 21 | if ( is_dir( $this->last_dir ) ) { |
| 22 | $return = $this->_scan_files( $this->path, $files, $this->offset, $limit, $this->last_dir ); |
| 23 | $this->offset = $return[0]; |
| 24 | $this->last_dir = $return[1]; |
| 25 | if ( count( $files ) < $limit ) |
| 26 | $this->last_dir = false; |
| 27 | } |
| 28 | return $files; |
| 29 | } |
| 30 | |
| 31 | function _scan_files( $path, &$files, $offset, $limit, &$last_dir ) { |
| 32 | $_offset = 0; |
| 33 | if ( is_readable( $path ) && $handle = opendir( $path ) ) { |
| 34 | while( false !== ( $entry = readdir( $handle ) ) ) { |
| 35 | if ( '.' == $entry || '..' == $entry ) |
| 36 | continue; |
| 37 | |
| 38 | ++$_offset; |
| 39 | $full_entry = $path . DIRECTORY_SEPARATOR . $entry; |
| 40 | $next_item = ltrim( str_replace( $path, '', $last_dir ), DIRECTORY_SEPARATOR ); |
| 41 | $next = preg_split( '#(?<!\\\\)' . preg_quote( DIRECTORY_SEPARATOR, '#' ) . '#', $next_item, 2 ); |
| 42 | |
| 43 | // Skip if the next item is not found. |
| 44 | if ( !empty( $next[0] ) && $next[0] != $entry ) |
| 45 | continue; |
| 46 | if ( rtrim( $last_dir, DIRECTORY_SEPARATOR ) == rtrim( $path, DIRECTORY_SEPARATOR ) && $_offset < $offset ) |
| 47 | continue; |
| 48 | if ( $this->ignore_symlinks && is_link( $full_entry ) ) |
| 49 | continue; |
| 50 | |
| 51 | if ( rtrim( $last_dir, DIRECTORY_SEPARATOR ) == rtrim( $path, DIRECTORY_SEPARATOR ) ) { |
| 52 | // Reset last_dir and offset when we reached the previous last_dir value. |
| 53 | $last_dir = ''; |
| 54 | $offset = 0; |
| 55 | } |
| 56 | |
| 57 | if ( is_file( $full_entry ) ) { |
| 58 | if ( !vp_is_interesting_file( $full_entry ) ) |
| 59 | continue; |
| 60 | $_return_offset = $_offset; |
| 61 | $_return_dir = dirname( $full_entry ); |
| 62 | $files[] = $full_entry; |
| 63 | } elseif ( is_dir( $full_entry ) ) { |
| 64 | list( $_return_offset, $_return_dir ) = $this->_scan_files( $full_entry, $files, $offset, $limit, $last_dir ); |
| 65 | } |
| 66 | if ( count( $files ) >= $limit ) { |
| 67 | closedir( $handle ); |
| 68 | return array( $_return_offset ?? 0, $_return_dir ?? null ); |
| 69 | } |
| 70 | } |
| 71 | closedir( $handle ); |
| 72 | } |
| 73 | return array( $_offset, $path ); |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | function vp_get_real_file_path( $file_path, $tmp_file = false ) { |
| 78 | global $site, $site_id; |
| 79 | $site_id = !empty( $site->id ) ? $site->id : $site_id; |
| 80 | if ( !$tmp_file && !empty( $site_id ) && function_exists( 'determine_file_type_path' ) ) { |
| 81 | $path = determine_file_type_path( $file_path ); |
| 82 | $file = file_by_path( $site_id, $path ); |
| 83 | if ( !$file ) |
| 84 | return false; |
| 85 | return $file->get_unencrypted(); |
| 86 | } |
| 87 | return !empty( $tmp_file ) ? $tmp_file : $file_path; |
| 88 | } |
| 89 | |
| 90 | function vp_is_interesting_file($file) { |
| 91 | $scan_only_regex = apply_filters( 'scan_only_extension_regex', '#\.(ph(p3|p4|p5|p|tml)|html|js|htaccess)$#i' ); |
| 92 | return preg_match( $scan_only_regex, $file ); |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * Uses the PHP tokenizer to split a file into 3 arrays: PHP code with no comments, |
| 97 | * PHP code with comments, and HTML/JS code. Helper wrapper around split_to_php_html() |
| 98 | * |
| 99 | * @param string $file The file path to read and parse |
| 100 | * @return array An array with 3 arrays of lines |
| 101 | */ |
| 102 | function split_file_to_php_html( $file ) { |
| 103 | $source = @file_get_contents( $file ); |
| 104 | if ( $source === false ) { |
| 105 | $source = ''; |
| 106 | } |
| 107 | return split_to_php_html( $source ); |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * Uses the PHP tokenizer to split a string into 3 arrays: PHP code with no comments, |
| 112 | * PHP code with comments, and HTML/JS code. |
| 113 | * |
| 114 | * @param string $source The file path to read and parse. |
| 115 | * @return array An array with 3 arrays of lines |
| 116 | */ |
| 117 | function split_to_php_html( $source ) { |
| 118 | $tokens = @token_get_all( $source ); |
| 119 | |
| 120 | $ret = array( 'php' => array(), 'php-with-comments' => array(), 'html' => array() ); |
| 121 | $current_line = 0; |
| 122 | $mode = 'html'; // need to see an open tag to switch to PHP mode |
| 123 | |
| 124 | foreach ( $tokens as $token ) { |
| 125 | if ( ! is_array( $token ) ) { |
| 126 | // single character, can't switch our mode; just add it and continue |
| 127 | // if it's PHP, should go into both versions; mode 'php' will do that |
| 128 | add_text_to_parsed( $ret, $mode, $current_line, $token ); |
| 129 | $current_line += substr_count( $token, "\n" ); |
| 130 | } else { |
| 131 | // more complex tokens is the interesting case |
| 132 | list( $id, $text, $line ) = $token; |
| 133 | |
| 134 | if ( 'php' === $mode ) { |
| 135 | // we're in PHP code |
| 136 | |
| 137 | // might be a comment |
| 138 | if ( T_COMMENT === $id || T_DOC_COMMENT === $id ) { |
| 139 | // add it to the PHP with comments array only |
| 140 | add_text_to_parsed( $ret, 'php-with-comments', $current_line, $text ); |
| 141 | |
| 142 | // special case for lines like: " // comment\n": |
| 143 | // if we're adding a comment with a newline, and the 'php' array current line |
| 144 | // has no trailing newline, add one |
| 145 | if ( substr_count( $text, "\n" ) >= 1 && ! empty( $ret['php'][ $current_line ] ) && 0 === substr_count( $ret['php'][ $current_line ], "\n" ) ) { |
| 146 | $ret['php'][ $current_line ] .= "\n"; |
| 147 | } |
| 148 | |
| 149 | // make sure to count newlines in comments |
| 150 | $current_line += substr_count( $text, "\n" ); |
| 151 | continue; |
| 152 | } |
| 153 | |
| 154 | // otherwise add it to both the PHP array and the with comments array |
| 155 | add_text_to_parsed( $ret, $mode, $current_line, $text ); |
| 156 | |
| 157 | // then see if we're breaking out |
| 158 | if ( T_CLOSE_TAG === $id ) { |
| 159 | $mode = 'html'; |
| 160 | } |
| 161 | } else if ( 'html' === $mode ) { |
| 162 | // we're in HTML code |
| 163 | |
| 164 | // if we see an open tag, switch to PHP |
| 165 | if ( T_OPEN_TAG === $id || T_OPEN_TAG_WITH_ECHO === $id ) { |
| 166 | $mode = 'php'; |
| 167 | } |
| 168 | |
| 169 | // add to the HTML array (or PHP if it was an open tag) |
| 170 | // if it is PHP, this will add it to both arrays, which is what we want |
| 171 | add_text_to_parsed( $ret, $mode, $current_line, $text ); |
| 172 | } |
| 173 | $current_line += substr_count( $text, "\n" ); |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | return $ret; |
| 178 | } |
| 179 | |
| 180 | /** |
| 181 | * Helper function for split_file_to_php_html; adds a chunk of text to the arrays we'll return. |
| 182 | * |
| 183 | * @param array $parsed The array containing all the languages we'll return. |
| 184 | * @param string $prefix The prefix for the languages we want to add this text to. |
| 185 | * @param int $start_line_number The line number that this text goes on. |
| 186 | * @param string $all_text The text to add. |
| 187 | */ |
| 188 | function add_text_to_parsed( &$parsed, $prefix, $start_line_number, $all_text ) { |
| 189 | $line_number = $start_line_number; |
| 190 | |
| 191 | // whitespace tokens may span multiple lines; we need to split them up so that the indentation goes on the next line |
| 192 | $fragments = explode( "\n", $all_text ); |
| 193 | foreach ( $fragments as $i => $fragment ) { |
| 194 | // each line needs to end with a newline to match the behavior of file() |
| 195 | if ( $i < count( $fragments ) - 1 ) { |
| 196 | $text = $fragment . "\n"; |
| 197 | } else { |
| 198 | $text = $fragment; |
| 199 | } |
| 200 | |
| 201 | if ( '' === $text ) { |
| 202 | // check for the empty string explicitly, rather than using empty() |
| 203 | // otherwise things like a '0' token will get skipped, because PHP is stupid |
| 204 | continue; |
| 205 | } |
| 206 | |
| 207 | if ( ! isset( $parsed[ $prefix ][ $line_number ] ) ) { |
| 208 | $parsed[ $prefix ][ $line_number ] = ''; |
| 209 | } |
| 210 | $parsed[ $prefix ][ $line_number ] .= $text; |
| 211 | if ( 'php' == $prefix ) { |
| 212 | if ( ! isset( $parsed[ 'php-with-comments' ][ $line_number ] ) ) { |
| 213 | $parsed[ 'php-with-comments' ][ $line_number ] = ''; |
| 214 | } |
| 215 | $parsed[ 'php-with-comments' ][ $line_number ] .= $text; |
| 216 | } |
| 217 | |
| 218 | // the caller will also update their line number based on the number of \n characters in the text |
| 219 | ++$line_number; |
| 220 | } |
| 221 | } |
| 222 | /** |
| 223 | * Scans a file with the registered signatures. To report a security notice for a specified signature, all its regular |
| 224 | * expressions should result in a match. |
| 225 | * @param $file the filename to be scanned. |
| 226 | * @param null $tmp_file used if the file to be scanned doesn't exist or if the filename doesn't match vp_is_interesting_file(). |
| 227 | * @return array|bool false if no matched signature is found. A list of matched signatures otherwise. |
| 228 | */ |
| 229 | function vp_scan_file( $file, $tmp_file = null, $use_parser = false ) { |
| 230 | $real_file = vp_get_real_file_path( $file, $tmp_file ); |
| 231 | $file_size = file_exists( $real_file ) ? @filesize( $real_file ) : 0; |
| 232 | if ( !is_readable( $real_file ) || !$file_size || $file_size > apply_filters( 'scan_max_file_size', 3 * 1024 * 1024 ) ) { // don't scan empty or files larger than 3MB. |
| 233 | return false; |
| 234 | } |
| 235 | |
| 236 | $file_content = null; |
| 237 | $file_parsed = null; |
| 238 | $skip_file = apply_filters_ref_array( 'pre_scan_file', array ( false, $file, $real_file, &$file_content ) ); |
| 239 | if ( false !== $skip_file ) { // maybe detect malware without regular expressions. |
| 240 | return $skip_file; |
| 241 | } |
| 242 | |
| 243 | if ( !vp_is_interesting_file( $file ) ) { // only scan relevant files. |
| 244 | return false; |
| 245 | } |
| 246 | |
| 247 | if ( !isset( $GLOBALS['vp_signatures'] ) ) { |
| 248 | $GLOBALS['vp_signatures'] = array(); |
| 249 | } |
| 250 | |
| 251 | $found = array (); |
| 252 | foreach ( $GLOBALS['vp_signatures'] as $signature ) { |
| 253 | if ( !is_object( $signature ) || !isset( $signature->patterns ) ) { |
| 254 | continue; |
| 255 | } |
| 256 | // if there is no filename_regex, we assume it's the same of vp_is_interesting_file(). |
| 257 | if ( empty( $signature->filename_regex ) || preg_match( '#' . addcslashes( $signature->filename_regex, '#' ) . '#i', $file ) ) { |
| 258 | if ( null === $file_content || !is_array( $file_content ) ) { |
| 259 | $file_content = @file( $real_file ); |
| 260 | |
| 261 | if ( $file_content === false ) { |
| 262 | return false; |
| 263 | } |
| 264 | |
| 265 | if ( $use_parser ) { |
| 266 | $file_parsed = split_file_to_php_html( $real_file ); |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | $is_vulnerable = true; |
| 271 | |
| 272 | $code = $file_content; |
| 273 | |
| 274 | if ( $use_parser ) { |
| 275 | // use the language specified in the signature if it has one |
| 276 | if ( ! empty( $signature->target_language ) && array_key_exists( $signature->target_language, $file_parsed ) ) { |
| 277 | $code = $file_parsed[ $signature->target_language ]; |
| 278 | |
| 279 | |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | $matches = array(); |
| 284 | if ( ! empty( $signature->patterns ) ) { |
| 285 | foreach ( $signature->patterns as $pattern ) { |
| 286 | $match = preg_grep( '#' . addcslashes( $pattern, '#' ) . '#im', $code ); |
| 287 | if ( empty( $match ) ) { |
| 288 | $is_vulnerable = false; |
| 289 | break; |
| 290 | } |
| 291 | |
| 292 | $matches += $match; |
| 293 | } |
| 294 | } |
| 295 | |
| 296 | // convert the matched line to an array of details showing context around the lines |
| 297 | $lines = array(); |
| 298 | |
| 299 | $lines_parsed = array(); |
| 300 | |
| 301 | $line_indices_parsed = array(); |
| 302 | |
| 303 | if ( $use_parser ) { |
| 304 | $line_indices_parsed = array_keys( $code ); |
| 305 | } |
| 306 | |
| 307 | foreach ( $matches as $line => $text ) { |
| 308 | $lines = array_merge( $lines, range( $line - 1, $line + 1 ) ); |
| 309 | if ( $use_parser ) { |
| 310 | $idx = array_search( $line, $line_indices_parsed ); |
| 311 | |
| 312 | // we might be looking at the first or last line; for the non-parsed case, array_intersect_key |
| 313 | // handles this transparently below; for the parsed case, since we have another layer of |
| 314 | // indirection, we have to handle that case here |
| 315 | $idx_around = array(); |
| 316 | if ( isset( $line_indices_parsed[ $idx - 1 ] ) ) { |
| 317 | $idx_around[] = $line_indices_parsed[ $idx - 1 ]; |
| 318 | } |
| 319 | $idx_around[] = $line_indices_parsed[ $idx ]; |
| 320 | if ( isset( $line_indices_parsed[ $idx + 1 ] ) ) { |
| 321 | $idx_around[] = $line_indices_parsed[ $idx + 1 ]; |
| 322 | } |
| 323 | $lines_parsed = array_merge( $lines_parsed, $idx_around ); |
| 324 | } |
| 325 | } |
| 326 | |
| 327 | $details = array_intersect_key( $file_content, array_flip( $lines ) ); |
| 328 | |
| 329 | $details_parsed = array(); |
| 330 | |
| 331 | if ( $use_parser ) { |
| 332 | $details_parsed = array_intersect_key( $code, array_flip( $lines_parsed ) ); |
| 333 | } |
| 334 | |
| 335 | // provide both 'matches' and 'details', as some places want 'matches' |
| 336 | // this matches the old behavior, which would add 'details' to some items, without replacing 'matches' |
| 337 | $debug_data = array( 'matches' => $matches, 'details' => $details ); |
| 338 | if ( $use_parser ) { |
| 339 | $debug_data['details_parsed'] = $details_parsed; |
| 340 | } |
| 341 | |
| 342 | // Additional checking needed? |
| 343 | if ( method_exists( $signature, 'get_detailed_scanner' ) && $scanner = $signature->get_detailed_scanner() ) |
| 344 | $is_vulnerable = $scanner->scan( $is_vulnerable, $file, $real_file, $file_content, $debug_data ); |
| 345 | if ( $is_vulnerable ) { |
| 346 | $found[$signature->id] = $debug_data; |
| 347 | if ( isset( $signature->severity ) && $signature->severity > 8 ) // don't continue scanning |
| 348 | break; |
| 349 | } |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | return apply_filters_ref_array( 'post_scan_file', array ( $found, $file, $real_file, &$file_content ) ); |
| 354 | } |