| 'use strict'; |
| |
| // adapted from http://code.google.com/p/plist/source/browse/trunk/src/com/dd/plist/BinaryPropertyListParser.java |
| |
| var fs = require('fs'); |
| var bigInt = require("big-integer"); |
| var debug = false; |
| |
| exports.maxObjectSize = 100 * 1000 * 1000; // 100Meg |
| exports.maxObjectCount = 32768; |
| |
| // EPOCH = new SimpleDateFormat("yyyy MM dd zzz").parse("2001 01 01 GMT").getTime(); |
| // ...but that's annoying in a static initializer because it can throw exceptions, ick. |
| // So we just hardcode the correct value. |
| var EPOCH = 978307200000; |
| |
| // UID object definition |
| var UID = exports.UID = function(id) { |
| this.UID = id; |
| } |
| |
| var parseFile = exports.parseFile = function (fileNameOrBuffer, callback) { |
| function tryParseBuffer(buffer) { |
| var err = null; |
| var result; |
| try { |
| result = parseBuffer(buffer); |
| } catch (ex) { |
| err = ex; |
| } |
| callback(err, result); |
| } |
| |
| if (Buffer.isBuffer(fileNameOrBuffer)) { |
| return tryParseBuffer(fileNameOrBuffer); |
| } else { |
| fs.readFile(fileNameOrBuffer, function (err, data) { |
| if (err) { return callback(err); } |
| tryParseBuffer(data); |
| }); |
| } |
| }; |
| |
| var parseBuffer = exports.parseBuffer = function (buffer) { |
| var result = {}; |
| |
| // check header |
| var header = buffer.slice(0, 'bplist'.length).toString('utf8'); |
| if (header !== 'bplist') { |
| throw new Error("Invalid binary plist. Expected 'bplist' at offset 0."); |
| } |
| |
| // Handle trailer, last 32 bytes of the file |
| var trailer = buffer.slice(buffer.length - 32, buffer.length); |
| // 6 null bytes (index 0 to 5) |
| var offsetSize = trailer.readUInt8(6); |
| if (debug) { |
| console.log("offsetSize: " + offsetSize); |
| } |
| var objectRefSize = trailer.readUInt8(7); |
| if (debug) { |
| console.log("objectRefSize: " + objectRefSize); |
| } |
| var numObjects = readUInt64BE(trailer, 8); |
| if (debug) { |
| console.log("numObjects: " + numObjects); |
| } |
| var topObject = readUInt64BE(trailer, 16); |
| if (debug) { |
| console.log("topObject: " + topObject); |
| } |
| var offsetTableOffset = readUInt64BE(trailer, 24); |
| if (debug) { |
| console.log("offsetTableOffset: " + offsetTableOffset); |
| } |
| |
| if (numObjects > exports.maxObjectCount) { |
| throw new Error("maxObjectCount exceeded"); |
| } |
| |
| // Handle offset table |
| var offsetTable = []; |
| |
| for (var i = 0; i < numObjects; i++) { |
| var offsetBytes = buffer.slice(offsetTableOffset + i * offsetSize, offsetTableOffset + (i + 1) * offsetSize); |
| offsetTable[i] = readUInt(offsetBytes, 0); |
| if (debug) { |
| console.log("Offset for Object #" + i + " is " + offsetTable[i] + " [" + offsetTable[i].toString(16) + "]"); |
| } |
| } |
| |
| // Parses an object inside the currently parsed binary property list. |
| // For the format specification check |
| // <a href="http://www.opensource.apple.com/source/CF/CF-635/CFBinaryPList.c"> |
| // Apple's binary property list parser implementation</a>. |
| function parseObject(tableOffset) { |
| var offset = offsetTable[tableOffset]; |
| var type = buffer[offset]; |
| var objType = (type & 0xF0) >> 4; //First 4 bits |
| var objInfo = (type & 0x0F); //Second 4 bits |
| switch (objType) { |
| case 0x0: |
| return parseSimple(); |
| case 0x1: |
| return parseInteger(); |
| case 0x8: |
| return parseUID(); |
| case 0x2: |
| return parseReal(); |
| case 0x3: |
| return parseDate(); |
| case 0x4: |
| return parseData(); |
| case 0x5: // ASCII |
| return parsePlistString(); |
| case 0x6: // UTF-16 |
| return parsePlistString(true); |
| case 0xA: |
| return parseArray(); |
| case 0xD: |
| return parseDictionary(); |
| default: |
| throw new Error("Unhandled type 0x" + objType.toString(16)); |
| } |
| |
| function parseSimple() { |
| //Simple |
| switch (objInfo) { |
| case 0x0: // null |
| return null; |
| case 0x8: // false |
| return false; |
| case 0x9: // true |
| return true; |
| case 0xF: // filler byte |
| return null; |
| default: |
| throw new Error("Unhandled simple type 0x" + objType.toString(16)); |
| } |
| } |
| |
| function bufferToHexString(buffer) { |
| var str = ''; |
| var i; |
| for (i = 0; i < buffer.length; i++) { |
| if (buffer[i] != 0x00) { |
| break; |
| } |
| } |
| for (; i < buffer.length; i++) { |
| var part = '00' + buffer[i].toString(16); |
| str += part.substr(part.length - 2); |
| } |
| return str; |
| } |
| |
| function parseInteger() { |
| var length = Math.pow(2, objInfo); |
| if (length > 4) { |
| var data = buffer.slice(offset + 1, offset + 1 + length); |
| var str = bufferToHexString(data); |
| return bigInt(str, 16); |
| } if (length < exports.maxObjectSize) { |
| return readUInt(buffer.slice(offset + 1, offset + 1 + length)); |
| } else { |
| throw new Error("To little heap space available! Wanted to read " + length + " bytes, but only " + exports.maxObjectSize + " are available."); |
| } |
| } |
| |
| function parseUID() { |
| var length = objInfo + 1; |
| if (length < exports.maxObjectSize) { |
| return new UID(readUInt(buffer.slice(offset + 1, offset + 1 + length))); |
| } else { |
| throw new Error("To little heap space available! Wanted to read " + length + " bytes, but only " + exports.maxObjectSize + " are available."); |
| } |
| } |
| |
| function parseReal() { |
| var length = Math.pow(2, objInfo); |
| if (length < exports.maxObjectSize) { |
| var realBuffer = buffer.slice(offset + 1, offset + 1 + length); |
| if (length === 4) { |
| return realBuffer.readFloatBE(0); |
| } |
| else if (length === 8) { |
| return realBuffer.readDoubleBE(0); |
| } |
| } else { |
| throw new Error("To little heap space available! Wanted to read " + length + " bytes, but only " + exports.maxObjectSize + " are available."); |
| } |
| } |
| |
| function parseDate() { |
| if (objInfo != 0x3) { |
| console.error("Unknown date type :" + objInfo + ". Parsing anyway..."); |
| } |
| var dateBuffer = buffer.slice(offset + 1, offset + 9); |
| return new Date(EPOCH + (1000 * dateBuffer.readDoubleBE(0))); |
| } |
| |
| function parseData() { |
| var dataoffset = 1; |
| var length = objInfo; |
| if (objInfo == 0xF) { |
| var int_type = buffer[offset + 1]; |
| var intType = (int_type & 0xF0) / 0x10; |
| if (intType != 0x1) { |
| console.error("0x4: UNEXPECTED LENGTH-INT TYPE! " + intType); |
| } |
| var intInfo = int_type & 0x0F; |
| var intLength = Math.pow(2, intInfo); |
| dataoffset = 2 + intLength; |
| if (intLength < 3) { |
| length = readUInt(buffer.slice(offset + 2, offset + 2 + intLength)); |
| } else { |
| length = readUInt(buffer.slice(offset + 2, offset + 2 + intLength)); |
| } |
| } |
| if (length < exports.maxObjectSize) { |
| return buffer.slice(offset + dataoffset, offset + dataoffset + length); |
| } else { |
| throw new Error("To little heap space available! Wanted to read " + length + " bytes, but only " + exports.maxObjectSize + " are available."); |
| } |
| } |
| |
| function parsePlistString (isUtf16) { |
| isUtf16 = isUtf16 || 0; |
| var enc = "utf8"; |
| var length = objInfo; |
| var stroffset = 1; |
| if (objInfo == 0xF) { |
| var int_type = buffer[offset + 1]; |
| var intType = (int_type & 0xF0) / 0x10; |
| if (intType != 0x1) { |
| console.err("UNEXPECTED LENGTH-INT TYPE! " + intType); |
| } |
| var intInfo = int_type & 0x0F; |
| var intLength = Math.pow(2, intInfo); |
| var stroffset = 2 + intLength; |
| if (intLength < 3) { |
| length = readUInt(buffer.slice(offset + 2, offset + 2 + intLength)); |
| } else { |
| length = readUInt(buffer.slice(offset + 2, offset + 2 + intLength)); |
| } |
| } |
| // length is String length -> to get byte length multiply by 2, as 1 character takes 2 bytes in UTF-16 |
| length *= (isUtf16 + 1); |
| if (length < exports.maxObjectSize) { |
| var plistString = new Buffer(buffer.slice(offset + stroffset, offset + stroffset + length)); |
| if (isUtf16) { |
| plistString = swapBytes(plistString); |
| enc = "ucs2"; |
| } |
| return plistString.toString(enc); |
| } else { |
| throw new Error("To little heap space available! Wanted to read " + length + " bytes, but only " + exports.maxObjectSize + " are available."); |
| } |
| } |
| |
| function parseArray() { |
| var length = objInfo; |
| var arrayoffset = 1; |
| if (objInfo == 0xF) { |
| var int_type = buffer[offset + 1]; |
| var intType = (int_type & 0xF0) / 0x10; |
| if (intType != 0x1) { |
| console.error("0xa: UNEXPECTED LENGTH-INT TYPE! " + intType); |
| } |
| var intInfo = int_type & 0x0F; |
| var intLength = Math.pow(2, intInfo); |
| arrayoffset = 2 + intLength; |
| if (intLength < 3) { |
| length = readUInt(buffer.slice(offset + 2, offset + 2 + intLength)); |
| } else { |
| length = readUInt(buffer.slice(offset + 2, offset + 2 + intLength)); |
| } |
| } |
| if (length * objectRefSize > exports.maxObjectSize) { |
| throw new Error("To little heap space available!"); |
| } |
| var array = []; |
| for (var i = 0; i < length; i++) { |
| var objRef = readUInt(buffer.slice(offset + arrayoffset + i * objectRefSize, offset + arrayoffset + (i + 1) * objectRefSize)); |
| array[i] = parseObject(objRef); |
| } |
| return array; |
| } |
| |
| function parseDictionary() { |
| var length = objInfo; |
| var dictoffset = 1; |
| if (objInfo == 0xF) { |
| var int_type = buffer[offset + 1]; |
| var intType = (int_type & 0xF0) / 0x10; |
| if (intType != 0x1) { |
| console.error("0xD: UNEXPECTED LENGTH-INT TYPE! " + intType); |
| } |
| var intInfo = int_type & 0x0F; |
| var intLength = Math.pow(2, intInfo); |
| dictoffset = 2 + intLength; |
| if (intLength < 3) { |
| length = readUInt(buffer.slice(offset + 2, offset + 2 + intLength)); |
| } else { |
| length = readUInt(buffer.slice(offset + 2, offset + 2 + intLength)); |
| } |
| } |
| if (length * 2 * objectRefSize > exports.maxObjectSize) { |
| throw new Error("To little heap space available!"); |
| } |
| if (debug) { |
| console.log("Parsing dictionary #" + tableOffset); |
| } |
| var dict = {}; |
| for (var i = 0; i < length; i++) { |
| var keyRef = readUInt(buffer.slice(offset + dictoffset + i * objectRefSize, offset + dictoffset + (i + 1) * objectRefSize)); |
| var valRef = readUInt(buffer.slice(offset + dictoffset + (length * objectRefSize) + i * objectRefSize, offset + dictoffset + (length * objectRefSize) + (i + 1) * objectRefSize)); |
| var key = parseObject(keyRef); |
| var val = parseObject(valRef); |
| if (debug) { |
| console.log(" DICT #" + tableOffset + ": Mapped " + key + " to " + val); |
| } |
| dict[key] = val; |
| } |
| return dict; |
| } |
| } |
| |
| return [ parseObject(topObject) ]; |
| }; |
| |
| function readUInt(buffer, start) { |
| start = start || 0; |
| |
| var l = 0; |
| for (var i = start; i < buffer.length; i++) { |
| l <<= 8; |
| l |= buffer[i] & 0xFF; |
| } |
| return l; |
| } |
| |
| // we're just going to toss the high order bits because javascript doesn't have 64-bit ints |
| function readUInt64BE(buffer, start) { |
| var data = buffer.slice(start, start + 8); |
| return data.readUInt32BE(4, 8); |
| } |
| |
| function swapBytes(buffer) { |
| var len = buffer.length; |
| for (var i = 0; i < len; i += 2) { |
| var a = buffer[i]; |
| buffer[i] = buffer[i+1]; |
| buffer[i+1] = a; |
| } |
| return buffer; |
| } |