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<?php namespace ApkParser; use ApkParser\Exceptions\XmlParserException; class XmlParser { const END_DOC_TAG = 0x101; const START_TAG = 0x102; const END_TAG = 0x103; const TEXT_TAG = 0x104; const RES_STRING_POOL_TYPE = 0x1; const RES_XML_START_ELEMENT_TYPE = 0x102; const RES_XML_RESOURCE_MAP_TYPE = 0x180; private $xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n"; private $bytes = array(); private $ready = false; public static $indent_spaces = ""; private $xmlObject = NULL; public function __construct(Stream $apkStream) { $this->bytes = $apkStream->getByteArray(); } public static function decompressFile($file, $destination = NULL) { if (!is_file($file)) { throw new \Exception("{$file} is not a regular file"); } $parser = new self(new Stream(fopen($file, 'rd'))); file_put_contents($destination === NULL ? $file : $destination, $parser->getXmlString()); } public function decompress() { $headerSize = $this->littleEndianShort($this->bytes, 1 * 2); $dataSize = $this->littleEndianWord($this->bytes, 2 * 2); $off = $headerSize; $resIdsOffset = -1; $resIdsCount = 0; while ($off < $dataSize - 8) { $chunkType = $this->littleEndianShort($this->bytes, $off + 0 * 2); $chunkHeaderSize = $this->littleEndianShort($this->bytes, $off + 1 * 2); $chunkSize = $this->littleEndianWord($this->bytes, $off + 2 * 2); if ($off + $chunkSize > $dataSize) { break; } if ($chunkType == self::RES_STRING_POOL_TYPE) { $numbStrings = $this->littleEndianWord($this->bytes, $off + 8); $sitOff = $off + $chunkHeaderSize; $stOff = $sitOff + $numbStrings * 4; } else { if ($chunkType == self::RES_XML_RESOURCE_MAP_TYPE) { $resIdsOffset = $off + $chunkHeaderSize; $resIdsCount = ($chunkSize - $chunkHeaderSize) / 4; } else { if ($chunkType == self::RES_XML_START_ELEMENT_TYPE) { break; } } } $off += $chunkSize; } $indentCount = 0; $startTagLineNo = -2; while ($off < count($this->bytes)) { $currentTag = $this->littleEndianShort($this->bytes, $off); $lineNo = $this->littleEndianWord($this->bytes, $off + 2 * 4); $nameNsSi = $this->littleEndianWord($this->bytes, $off + 4 * 4); $nameSi = $this->littleEndianWord($this->bytes, $off + 5 * 4); switch ($currentTag) { case self::START_TAG: $tagSix = $this->littleEndianWord($this->bytes, $off + 6 * 4); $numbAttrs = $this->littleEndianWord($this->bytes, $off + 7 * 4); $off += 9 * 4; $tagName = $this->compXmlString($this->bytes, $sitOff, $stOff, $nameSi); $startTagLineNo = $lineNo; $attr_string = ""; for ($ii = 0; $ii < $numbAttrs; $ii++) { $attrNameNsSi = $this->littleEndianWord($this->bytes, $off); $attrNameSi = $this->littleEndianWord($this->bytes, $off + 1 * 4); $attrValueSi = $this->littleEndianWord($this->bytes, $off + 2 * 4); $attrFlags = $this->littleEndianWord($this->bytes, $off + 3 * 4); $attrResId = $this->littleEndianWord($this->bytes, $off + 4 * 4); $off += 5 * 4; $attrName = $this->compXmlString($this->bytes, $sitOff, $stOff, $attrNameSi); $attrNameResID = $this->littleEndianWord($this->bytes, $resIdsOffset + $attrNameSi * 4); if (empty($attrName)) { $attrName = $this->getResourceNameFromID($attrNameResID); } if ($attrValueSi != 0xffffffff && $attrValueSi != -1) { $attrValue = $this->compXmlString($this->bytes, $sitOff, $stOff, $attrValueSi); } else { $attrValue = "0x" . dechex($attrResId); } $attr_string .= " " . $attrName . "=\"" . $attrValue . "\""; } $this->appendXmlIndent($indentCount, "<" . $tagName . $attr_string . ">"); $indentCount++; break; case self::END_TAG: $indentCount--; $off += 6 * 4; $tagName = $this->compXmlString($this->bytes, $sitOff, $stOff, $nameSi); $this->appendXmlIndent($indentCount, "</" . $tagName . ">"); break; case self::END_DOC_TAG: $this->ready = true; break 2; break; case self::TEXT_TAG: $sentinal = -1; while ($off < count($this->bytes)) { $curr = $this->littleEndianWord($this->bytes, $off); $off += 4; if ($off > count($this->bytes)) { throw new \Exception("Sentinal not found before end of file"); } if ($curr == $sentinal && $sentinal == -1) { $sentinal = 0; } else { if ($curr == $sentinal) { break; } } } break; default: throw new \Exception("Unrecognized tag code '" . dechex($currentTag) . "' at offset " . $off); break; } } } public function compXmlString($xml, $sitOff, $stOff, $str_index) { if ($str_index < 0) { return null; } $strOff = $stOff + $this->littleEndianWord($xml, $sitOff + $str_index * 4); return $this->compXmlStringAt($xml, $strOff); } public function appendXmlIndent($indent, $str) { $this->appendXml(substr(self::$indent_spaces, 0, min($indent * 2, strlen(self::$indent_spaces))) . $str); } public function appendXml($str) { $this->xml .= $str . "\r\n"; } public function compXmlStringAt($arr, $string_offset) { $strlen = $arr[$string_offset + 1] << 8 & 0xff00 | $arr[$string_offset] & 0xff; $string_offset += 2; $string = ""; $strEnd = $string_offset + $strlen * 2; if (function_exists("mb_convert_encoding")) { for ($i = $string_offset; $i < $strEnd; $i++) { $string .= chr($arr[$i]); } $string = mb_convert_encoding($string, "UTF-8", "UTF-16LE"); } else { for ($i = $string_offset; $i < $strEnd; $i += 2) { $string .= chr($arr[$i]); } } return $string; } public function littleEndianWord($arr, $off) { $signShifAmount = PHP_INT_SIZE - 4 << 3; return ($arr[$off + 3] << 24 & 0xff000000 | $arr[$off + 2] << 16 & 0xff0000 | $arr[$off + 1] << 8 & 0xff00 | $arr[$off] & 0xff) << $signShifAmount >> $signShifAmount; } public function littleEndianShort($arr, $off) { $signShifAmount = PHP_INT_SIZE - 2 << 3; return ($arr[$off + 1] << 8 & 0xff00 | $arr[$off] & 0xff) << $signShifAmount >> $signShifAmount; } public function output() {