flex-maven-tools/flex-sdk-converter/retrievers/download/src/main/java/org/apache/flex/utilities/converter/retrievers/download/utils/DmgExtractor.java - flex-utilities - Git at Google

 package org.apache.flex.utilities.converter.retrievers.download.utils;

 import org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream;
 import org.apache.commons.io.input.NullInputStream;
 import org.apache.flex.utilities.converter.retrievers.download.utils.utils.*;
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
 import org.w3c.dom.NodeList;
 import org.xml.sax.SAXException;

 import javax.xml.bind.DatatypeConverter;
 import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;
 import javax.xml.parsers.ParserConfigurationException;
 import javax.xml.transform.OutputKeys;
 import javax.xml.transform.Transformer;
 import javax.xml.transform.TransformerFactory;
 import javax.xml.transform.dom.DOMSource;
 import javax.xml.transform.stream.StreamResult;
 import javax.xml.xpath.XPath;
 import javax.xml.xpath.XPathConstants;
 import javax.xml.xpath.XPathExpressionException;
 import javax.xml.xpath.XPathFactory;
 import java.io.*;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;

 /**
  * Tool to read and unpack a dmg image. Based upon the format description at:
  * http://newosxbook.com/DMG.html
  *
  * HFSleuth> fs flashplayer_20_sa_debug.dmg
  * KOLY header found at 14457517:
  *         UDIF version 4, Header Size: 512
  *         Flags:1
  *         Rsrc fork: None
  *         Data fork: from 0, spanning 14444891 bytes
  *         XML plist: from 14444891, spanning 12626 bytes (to 14457517)
  *         Segment #: 1, Count: 1
  *         Segment UUID: 8a7e1df1-6648ad9f-78cb06a4-2c5be967
  *         Running Data fork offset 0
  *         Sectors: 70816
  * Apple_HFS detected
  * Found Terminator in last block. Good
  * decompression done - Writing to /tmp/decompressed.dmg..
  * processBTree: Node kind 0, 0 records - should be kind 1, 3 records - but it isn't!
  * node is 0
  * RC was 0
  *
  * Created by christoferdutz on 24.02.16.
  */
 public class DmgExtractor {

     // Hex for "koly", which are the DMG magic bytes.
     private static final byte[] DMG_TRAILER_MAGIC_BYTES = {0x6B, 0x6F, 0x6C, 0x79};

     public File extract(File inputFile) {
         try {
             // Try to find the DMG trailer.
             // (A header containing the metadata, but located at the end)
             DmgTrailer dmgTrailer = findDmgTrailer(inputFile);
             if(dmgTrailer != null) {
                 float sizeInMegabytes = dmgTrailer.getDataForkLength() / (1024 * 1024);
                 System.out.println(" - Preparing to extract " + sizeInMegabytes + " MB");

                 // Read the property-list Xml document in the DMG file.
                 List<DmgPropertyListMishBlock> mishBlocks = getPropertyList(inputFile, dmgTrailer);

                 byte[] buffer = new byte[1024];
                 int blockCounter = 0;
                 for(DmgPropertyListMishBlock mishBlock : mishBlocks) {
                     System.out.println("   - Processing block: " + blockCounter + " - " + mishBlock.getBlockName());
                     int chunkCounter = 0;
                     for(DmgBlockChunkEntry blockChunkEntry : mishBlock.getBlockChunkEntries()) {
                         System.out.println("     - Processing chunk: " + chunkCounter + " - " + blockChunkEntry.toString());
                         FileInputStream fis = new FileInputStream(inputFile);

                         try {
                             // Position the read head at the beginning of this entry.
                             fis.skip(mishBlock.getDataOffset() + blockChunkEntry.getCompressedOffset());

                             // Depending on the chunk entry type, process the input data.
                             InputStream is = null;
                             switch (blockChunkEntry.getEntryType()) {
                                 case 0x00000000:
                                     //entryTypeName = "Zero-Fill";
                                     is = new NullInputStream(blockChunkEntry.getCompressedLength());
                                     break;
                                 case 0x00000001:
                                     //entryTypeName = "UDRW/UDRO - RAW or NULL compression (uncompressed)";
                                     is = fis;
                                     break;
                                 case 0x00000002:
                                     //entryTypeName = "Ignored/unknown";
                                     // TODO: Implement
                                     break;
                                 case 0x80000004:
                                     //entryTypeName = "UDCO - Apple Data Compression (ADC)";
                                     // TODO: Implement
                                     break;
                                 case 0x80000005:
                                     //entryTypeName = "UDZO - zLib data compression";
                                     // TODO: Implement
                                     break;
                                 case 0x80000006:
                                     //entryTypeName = "UDBZ - bz2lib data compression";
                                     is = new BZip2CompressorInputStream(fis);
                                     break;
                                 case 0x7ffffffe:
                                     //entryTypeName = "No blocks - Comment: +beg and +end";
                                     // TODO: Implement
                                 default:
                             }

                             if (is != null) {
                                 // Read the data into a byte-buffer.
                                 ByteArrayOutputStream baos = new ByteArrayOutputStream();
                                 int n;
                                 while ((n = is.read(buffer)) != -1) {
                                     baos.write(buffer, 0, n);
                                 }

                                 System.out.println("        - Number of sectors: " + blockChunkEntry.getSectorCount() +
                                         " sector size: " + (baos.size() / blockChunkEntry.getSectorCount()));

                                 ByteArrayInputStream bis = new ByteArrayInputStream(baos.toByteArray());
                                 DataInputStream dis = new DataInputStream(bis);
                                 // Depending on the type, process the data in the buffer.
                                 if (mishBlock.getBlockName().contains("Driver Descriptor Map")) {
                                     DriverDescriptorMap driverDescriptorMap = new DriverDescriptorMap(dis);
                                     System.out.println("        - " + driverDescriptorMap.toString());
                                 }
                                 if (mishBlock.getBlockName().contains("Apple_partition_map")) {
                                     List<ApplePartitionMap> partitionMaps =
                                             new ArrayList<ApplePartitionMap>((int) blockChunkEntry.getSectorCount());
                                     for(int i = 0; i < blockChunkEntry.getSectorCount(); i++) {
                                         try {
                                             ApplePartitionMap partitionMap = new ApplePartitionMap(dis);
                                             System.out.println("        - Partition " + i + " - " +
                                                     partitionMap.getTypeOfPartition() + " - " +
                                                     partitionMap.toString());
                                             partitionMaps.add(partitionMap);
                                         } catch(Exception e) {
                                             break;
                                         }
                                     }
                                 }
                                 // See: https://en.wikipedia.org/wiki/Hierarchical_File_System
                                 else if (mishBlock.getBlockName().contains("Apple_HFS")) {
                                     // Block 0 and 1 contain the boot blocks (each 512 bytes)
                                     // We need to skip these.
                                     // TODO: Eventually implement.
                                     dis.skipBytes(1024);
                                     System.out.println("        - Skipped boot block (0 and 1)");
                                     // Block 2 contains the master directory block
                                     // TODO: Actually this could also be a normal HFS volume ...
                                     IHFSVolumeHeader iHfsVolumeHeader = HFSVolumeFactory.readHfsVolumeHeader(dis);
                                     System.out.println("        - " + iHfsVolumeHeader.toString());
                                     // In the old HFS format the third block contains the volume
                                     // bitmap, in HFS+ this is located as a normal file in the volume.
                                     if(iHfsVolumeHeader instanceof HFSVolumeHeader) {
                                         HFSVolumeHeader hfsVolumeHeader = (HFSVolumeHeader) iHfsVolumeHeader;
                                         // Block 3 contains the volume bitmap
                                         // (one bit represents the usage of one block)
                                         // https://en.wikipedia.org/wiki/Hierarchical_File_System
                                         /*int volumeBitmapSize = hfsVolumeHeader.getTotalBlocks() / 8;
                                         byte[] volumeBitmap = new byte[volumeBitmapSize];
                                         dis.read(volumeBitmap);
                                         System.out.println(volumeBitmap);*/
                                     }
                                     else if(iHfsVolumeHeader instanceof HFSPlusVolumeHeader) {
                                         HFSPlusVolumeHeader hfsPlusVolumeHeader =
                                                 (HFSPlusVolumeHeader) iHfsVolumeHeader;
                                         // https://en.wikipedia.org/wiki/HFS_Plus
                                         // http://pages.cs.wisc.edu/~legault/miniproj-736.pdf
                                     }
                                 }
                                 chunkCounter++;
                             }
                         } catch(IOException ioe) {
                             ioe.printStackTrace();
                         } finally {
                             try {
                                 fis.close();
                             } catch(IOException e) {
                                 // Ignore
                             }
                         }
                     }
                     blockCounter++;
                 }
             }
         } catch (IOException e) {
             e.printStackTrace();
         } catch (ParserConfigurationException e) {
             e.printStackTrace();
         } catch (SAXException e) {
             e.printStackTrace();
         } catch (XPathExpressionException e) {
             e.printStackTrace();
         }
         return null;
     }

     private DmgTrailer findDmgTrailer(File inputFile) throws IOException {
         long startTime = new Date().getTime();

         RandomAccessFile raf = new RandomAccessFile(inputFile, "r");
         // The size of the DMG trailer is 512 bytes. As it's located at the
         // end of the file there is no use starting to search for it from the
         // beginning. So we read a block that's slightly bigger than the
         // trailer and search for the magic words in this block.
         long curBlockStartPosition = raf.length() - 600;
         long dmgTrailerPosition = -1;
         do {
             // Position the read "head".
             raf.seek(curBlockStartPosition);

             // Read a block of 600 bytes.
             byte[] curBlock = new byte[600];
             raf.read(curBlock);

             // Scan the current block for the magic bytes.
             int curMagicWordPosition = 0;
             for (int curBlockPosition = 0; curBlockPosition < 600; curBlockPosition++) {
                 if (curBlock[curBlockPosition] == DMG_TRAILER_MAGIC_BYTES[curMagicWordPosition]) {
                     curMagicWordPosition++;
                 } else {
                     curMagicWordPosition = 0;
                 }
                 if (curMagicWordPosition == 4) {
                     // We are just comparing the last byte of the magic word
                     // so we only have to go back 3 bytes.
                     dmgTrailerPosition = curBlockStartPosition + (long) curBlockPosition - 3;
                     break;
                 }
             }

             // If we were in the first block, quit searching.
             if(curBlockStartPosition == 0) {
                 break;
             }
             // We shift the search box back, but keep 4 bytes of overlap
             // just in case the magic word was at the boundary of the block.
             // This way we will be able to read it in the next pass.
             curBlockStartPosition = Math.max(0, curBlockStartPosition - 596);
         } while(dmgTrailerPosition == -1);
         long endTime = new Date().getTime();
         System.out.println("Found DMG trailer at position " + dmgTrailerPosition + " in " + (endTime - startTime) + "ms");

         // Read and parse the trailer data.
         if(dmgTrailerPosition != -1) {
             raf.seek(dmgTrailerPosition);
             byte[] dmgTrailerData = new byte[512];
             raf.read(dmgTrailerData);
             return new DmgTrailer(dmgTrailerData);
         }

         return null;
     }

     private List<DmgPropertyListMishBlock> getPropertyList(File inputFile, DmgTrailer dmgTrailer) throws IOException,
             ParserConfigurationException, SAXException, XPathExpressionException {
         // Read the block of bytes containing the property list data.
         byte[] propertyListData = new byte[(int) dmgTrailer.getXmlLength()];
         RandomAccessFile raf = new RandomAccessFile(inputFile, "r");
         raf.seek(dmgTrailer.getXmlOffset());
         raf.read(propertyListData);

         // Parse the xml document data.
         DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
         factory.setNamespaceAware(true);
         DocumentBuilder builder = factory.newDocumentBuilder();
         Document propertyListDoc = builder.parse(new ByteArrayInputStream(propertyListData));

         try {
             TransformerFactory tf = TransformerFactory.newInstance();
             Transformer transformer = tf.newTransformer();
             transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "no");
             transformer.setOutputProperty(OutputKeys.METHOD, "xml");
             transformer.setOutputProperty(OutputKeys.INDENT, "yes");
             transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
             transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");

             transformer.transform(new DOMSource(propertyListDoc),
                     new StreamResult(new OutputStreamWriter(System.out, "UTF-8")));
         } catch(Exception e) {
             // Ignore ...
         }

         List<DmgPropertyListMishBlock> mishBlocks = new ArrayList<DmgPropertyListMishBlock>();
         XPath xPath = XPathFactory.newInstance().newXPath();
         NodeList nodes = (NodeList) xPath.evaluate("//array/dict[key='CFName']/data",
                 propertyListDoc.getDocumentElement(), XPathConstants.NODESET);
         for (int i = 0; i < nodes.getLength(); ++i) {
             Element dataElement = (Element) nodes.item(i);
             Element nameElement = (Element) dataElement.getPreviousSibling().getPreviousSibling()
                     .getPreviousSibling().getPreviousSibling();
             byte[] dataBlock = DatatypeConverter.parseBase64Binary(dataElement.getTextContent());
             DmgPropertyListMishBlock mishBlock = new DmgPropertyListMishBlock(nameElement.getTextContent(), dataBlock);
             mishBlocks.add(mishBlock);
         }
         return mishBlocks;
     }

     public static void main(String[] args) throws Exception {
         File input = new File("/Users/christoferdutz/Downloads/flashplayer_20_sa_debug.dmg");
         DmgExtractor dmgExtractor = new DmgExtractor();
         dmgExtractor.extract(input);
     }

     public static String getStringFromZeroTerminatedByteArray(byte[] data) {
         int i;
         for (i = 0; i < data.length && data[i] != 0; i++) { }
         return new String(data, 0, i);
     }

 }
	package org.apache.flex.utilities.converter.retrievers.download.utils;

	import org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream;
	import org.apache.commons.io.input.NullInputStream;
	import org.apache.flex.utilities.converter.retrievers.download.utils.utils.*;
	import org.w3c.dom.Document;
	import org.w3c.dom.Element;
	import org.w3c.dom.NodeList;
	import org.xml.sax.SAXException;

	import javax.xml.bind.DatatypeConverter;
	import javax.xml.parsers.DocumentBuilder;
	import javax.xml.parsers.DocumentBuilderFactory;
	import javax.xml.parsers.ParserConfigurationException;
	import javax.xml.transform.OutputKeys;
	import javax.xml.transform.Transformer;
	import javax.xml.transform.TransformerFactory;
	import javax.xml.transform.dom.DOMSource;
	import javax.xml.transform.stream.StreamResult;
	import javax.xml.xpath.XPath;
	import javax.xml.xpath.XPathConstants;
	import javax.xml.xpath.XPathExpressionException;
	import javax.xml.xpath.XPathFactory;
	import java.io.*;
	import java.util.ArrayList;
	import java.util.Date;
	import java.util.List;

	/**
	* Tool to read and unpack a dmg image. Based upon the format description at:
	* http://newosxbook.com/DMG.html
	*
	* HFSleuth> fs flashplayer_20_sa_debug.dmg
	* KOLY header found at 14457517:
	* UDIF version 4, Header Size: 512
	* Flags:1
	* Rsrc fork: None
	* Data fork: from 0, spanning 14444891 bytes
	* XML plist: from 14444891, spanning 12626 bytes (to 14457517)
	* Segment #: 1, Count: 1
	* Segment UUID: 8a7e1df1-6648ad9f-78cb06a4-2c5be967
	* Running Data fork offset 0
	* Sectors: 70816
	* Apple_HFS detected
	* Found Terminator in last block. Good
	* decompression done - Writing to /tmp/decompressed.dmg..
	* processBTree: Node kind 0, 0 records - should be kind 1, 3 records - but it isn't!
	* node is 0
	* RC was 0
	*
	* Created by christoferdutz on 24.02.16.
	*/
	public class DmgExtractor {

	// Hex for "koly", which are the DMG magic bytes.
	private static final byte[] DMG_TRAILER_MAGIC_BYTES = {0x6B, 0x6F, 0x6C, 0x79};

	public File extract(File inputFile) {
	try {
	// Try to find the DMG trailer.
	// (A header containing the metadata, but located at the end)
	DmgTrailer dmgTrailer = findDmgTrailer(inputFile);
	if(dmgTrailer != null) {
	float sizeInMegabytes = dmgTrailer.getDataForkLength() / (1024 * 1024);
	System.out.println(" - Preparing to extract " + sizeInMegabytes + " MB");

	// Read the property-list Xml document in the DMG file.
	List<DmgPropertyListMishBlock> mishBlocks = getPropertyList(inputFile, dmgTrailer);

	byte[] buffer = new byte[1024];
	int blockCounter = 0;
	for(DmgPropertyListMishBlock mishBlock : mishBlocks) {
	System.out.println(" - Processing block: " + blockCounter + " - " + mishBlock.getBlockName());
	int chunkCounter = 0;
	for(DmgBlockChunkEntry blockChunkEntry : mishBlock.getBlockChunkEntries()) {
	System.out.println(" - Processing chunk: " + chunkCounter + " - " + blockChunkEntry.toString());
	FileInputStream fis = new FileInputStream(inputFile);

	try {
	// Position the read head at the beginning of this entry.
	fis.skip(mishBlock.getDataOffset() + blockChunkEntry.getCompressedOffset());

	// Depending on the chunk entry type, process the input data.
	InputStream is = null;
	switch (blockChunkEntry.getEntryType()) {
	case 0x00000000:
	//entryTypeName = "Zero-Fill";
	is = new NullInputStream(blockChunkEntry.getCompressedLength());
	break;
	case 0x00000001:
	//entryTypeName = "UDRW/UDRO - RAW or NULL compression (uncompressed)";
	is = fis;
	break;
	case 0x00000002:
	//entryTypeName = "Ignored/unknown";
	// TODO: Implement
	break;
	case 0x80000004:
	//entryTypeName = "UDCO - Apple Data Compression (ADC)";
	// TODO: Implement
	break;
	case 0x80000005:
	//entryTypeName = "UDZO - zLib data compression";
	// TODO: Implement
	break;
	case 0x80000006:
	//entryTypeName = "UDBZ - bz2lib data compression";
	is = new BZip2CompressorInputStream(fis);
	break;
	case 0x7ffffffe:
	//entryTypeName = "No blocks - Comment: +beg and +end";
	// TODO: Implement
	default:
	}

	if (is != null) {
	// Read the data into a byte-buffer.
	ByteArrayOutputStream baos = new ByteArrayOutputStream();
	int n;
	while ((n = is.read(buffer)) != -1) {
	baos.write(buffer, 0, n);
	}

	System.out.println(" - Number of sectors: " + blockChunkEntry.getSectorCount() +
	" sector size: " + (baos.size() / blockChunkEntry.getSectorCount()));

	ByteArrayInputStream bis = new ByteArrayInputStream(baos.toByteArray());
	DataInputStream dis = new DataInputStream(bis);
	// Depending on the type, process the data in the buffer.
	if (mishBlock.getBlockName().contains("Driver Descriptor Map")) {
	DriverDescriptorMap driverDescriptorMap = new DriverDescriptorMap(dis);
	System.out.println(" - " + driverDescriptorMap.toString());
	}
	if (mishBlock.getBlockName().contains("Apple_partition_map")) {
	List<ApplePartitionMap> partitionMaps =
	new ArrayList<ApplePartitionMap>((int) blockChunkEntry.getSectorCount());
	for(int i = 0; i < blockChunkEntry.getSectorCount(); i++) {
	try {
	ApplePartitionMap partitionMap = new ApplePartitionMap(dis);
	System.out.println(" - Partition " + i + " - " +
	partitionMap.getTypeOfPartition() + " - " +
	partitionMap.toString());
	partitionMaps.add(partitionMap);
	} catch(Exception e) {
	break;
	}
	}
	}
	// See: https://en.wikipedia.org/wiki/Hierarchical_File_System
	else if (mishBlock.getBlockName().contains("Apple_HFS")) {
	// Block 0 and 1 contain the boot blocks (each 512 bytes)
	// We need to skip these.
	// TODO: Eventually implement.
	dis.skipBytes(1024);
	System.out.println(" - Skipped boot block (0 and 1)");
	// Block 2 contains the master directory block
	// TODO: Actually this could also be a normal HFS volume ...
	IHFSVolumeHeader iHfsVolumeHeader = HFSVolumeFactory.readHfsVolumeHeader(dis);
	System.out.println(" - " + iHfsVolumeHeader.toString());
	// In the old HFS format the third block contains the volume
	// bitmap, in HFS+ this is located as a normal file in the volume.
	if(iHfsVolumeHeader instanceof HFSVolumeHeader) {
	HFSVolumeHeader hfsVolumeHeader = (HFSVolumeHeader) iHfsVolumeHeader;
	// Block 3 contains the volume bitmap
	// (one bit represents the usage of one block)
	// https://en.wikipedia.org/wiki/Hierarchical_File_System
	/*int volumeBitmapSize = hfsVolumeHeader.getTotalBlocks() / 8;
	byte[] volumeBitmap = new byte[volumeBitmapSize];
	dis.read(volumeBitmap);
	System.out.println(volumeBitmap);*/
	}
	else if(iHfsVolumeHeader instanceof HFSPlusVolumeHeader) {
	HFSPlusVolumeHeader hfsPlusVolumeHeader =
	(HFSPlusVolumeHeader) iHfsVolumeHeader;
	// https://en.wikipedia.org/wiki/HFS_Plus
	// http://pages.cs.wisc.edu/~legault/miniproj-736.pdf
	}
	}
	chunkCounter++;
	}
	} catch(IOException ioe) {
	ioe.printStackTrace();
	} finally {
	try {
	fis.close();
	} catch(IOException e) {
	// Ignore
	}
	}
	}
	blockCounter++;
	}
	}
	} catch (IOException e) {
	e.printStackTrace();
	} catch (ParserConfigurationException e) {
	e.printStackTrace();
	} catch (SAXException e) {
	e.printStackTrace();
	} catch (XPathExpressionException e) {
	e.printStackTrace();
	}
	return null;
	}

	private DmgTrailer findDmgTrailer(File inputFile) throws IOException {
	long startTime = new Date().getTime();

	RandomAccessFile raf = new RandomAccessFile(inputFile, "r");
	// The size of the DMG trailer is 512 bytes. As it's located at the
	// end of the file there is no use starting to search for it from the
	// beginning. So we read a block that's slightly bigger than the
	// trailer and search for the magic words in this block.
	long curBlockStartPosition = raf.length() - 600;
	long dmgTrailerPosition = -1;
	do {
	// Position the read "head".
	raf.seek(curBlockStartPosition);

	// Read a block of 600 bytes.
	byte[] curBlock = new byte[600];
	raf.read(curBlock);

	// Scan the current block for the magic bytes.
	int curMagicWordPosition = 0;
	for (int curBlockPosition = 0; curBlockPosition < 600; curBlockPosition++) {
	if (curBlock[curBlockPosition] == DMG_TRAILER_MAGIC_BYTES[curMagicWordPosition]) {
	curMagicWordPosition++;
	} else {
	curMagicWordPosition = 0;
	}
	if (curMagicWordPosition == 4) {
	// We are just comparing the last byte of the magic word
	// so we only have to go back 3 bytes.
	dmgTrailerPosition = curBlockStartPosition + (long) curBlockPosition - 3;
	break;
	}
	}

	// If we were in the first block, quit searching.
	if(curBlockStartPosition == 0) {
	break;
	}
	// We shift the search box back, but keep 4 bytes of overlap
	// just in case the magic word was at the boundary of the block.
	// This way we will be able to read it in the next pass.
	curBlockStartPosition = Math.max(0, curBlockStartPosition - 596);
	} while(dmgTrailerPosition == -1);
	long endTime = new Date().getTime();
	System.out.println("Found DMG trailer at position " + dmgTrailerPosition + " in " + (endTime - startTime) + "ms");

	// Read and parse the trailer data.
	if(dmgTrailerPosition != -1) {
	raf.seek(dmgTrailerPosition);
	byte[] dmgTrailerData = new byte[512];
	raf.read(dmgTrailerData);
	return new DmgTrailer(dmgTrailerData);
	}

	return null;
	}

	private List<DmgPropertyListMishBlock> getPropertyList(File inputFile, DmgTrailer dmgTrailer) throws IOException,
	ParserConfigurationException, SAXException, XPathExpressionException {
	// Read the block of bytes containing the property list data.
	byte[] propertyListData = new byte[(int) dmgTrailer.getXmlLength()];
	RandomAccessFile raf = new RandomAccessFile(inputFile, "r");
	raf.seek(dmgTrailer.getXmlOffset());
	raf.read(propertyListData);

	// Parse the xml document data.
	DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
	factory.setNamespaceAware(true);
	DocumentBuilder builder = factory.newDocumentBuilder();
	Document propertyListDoc = builder.parse(new ByteArrayInputStream(propertyListData));

	try {
	TransformerFactory tf = TransformerFactory.newInstance();
	Transformer transformer = tf.newTransformer();
	transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "no");
	transformer.setOutputProperty(OutputKeys.METHOD, "xml");
	transformer.setOutputProperty(OutputKeys.INDENT, "yes");
	transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
	transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");

	transformer.transform(new DOMSource(propertyListDoc),
	new StreamResult(new OutputStreamWriter(System.out, "UTF-8")));
	} catch(Exception e) {
	// Ignore ...
	}

	List<DmgPropertyListMishBlock> mishBlocks = new ArrayList<DmgPropertyListMishBlock>();
	XPath xPath = XPathFactory.newInstance().newXPath();
	NodeList nodes = (NodeList) xPath.evaluate("//array/dict[key='CFName']/data",
	propertyListDoc.getDocumentElement(), XPathConstants.NODESET);
	for (int i = 0; i < nodes.getLength(); ++i) {
	Element dataElement = (Element) nodes.item(i);
	Element nameElement = (Element) dataElement.getPreviousSibling().getPreviousSibling()
	.getPreviousSibling().getPreviousSibling();
	byte[] dataBlock = DatatypeConverter.parseBase64Binary(dataElement.getTextContent());
	DmgPropertyListMishBlock mishBlock = new DmgPropertyListMishBlock(nameElement.getTextContent(), dataBlock);
	mishBlocks.add(mishBlock);
	}
	return mishBlocks;
	}

	public static void main(String[] args) throws Exception {
	File input = new File("/Users/christoferdutz/Downloads/flashplayer_20_sa_debug.dmg");
	DmgExtractor dmgExtractor = new DmgExtractor();
	dmgExtractor.extract(input);
	}

	public static String getStringFromZeroTerminatedByteArray(byte[] data) {
	int i;
	for (i = 0; i < data.length && data[i] != 0; i++) { }
	return new String(data, 0, i);
	}

	}