Convertion of byte array in UTF-8 to GSM character set.

I want to convert byte array in UTF-8 to GSM character set. Please advice How can I do that?

String s = new String(byteArrayInUTF8,"utf-8");This will convert your byte array to a Java UNICODE UTF-16 encoded String on the assumption that the byte array represents characters encoded as utf-8.
I don't understand what GSM characters are so someone else will have to help you with the second part.

Similar Messages

Truncate byte array of UTF-8 characters without corrupting the data?

Hi all,
I need to be able to determine if the byte array, which is truncated from the original byte array representing UTF-8 string, contains corrupted character. Knowing if the byte array contains corrupted character allows me to remove it from the truncated array.
As in the sample code below, when truncate the string with 16 bytes it displays ok. However, truncate with 17 bytes, the last character is corrupted. Is there a way to check to see if the character is corrupted so that it can be removed from the truncated byte array?
Thanks in advance,
Phuong
PS: The Japanese characters I chose it randomly from Unicode charts. I don't know their meaning so if it is offensive, please forgive me.
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.UnsupportedEncodingException;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
public class TestTruncateUTF8 extends JFrame
    private static final long serialVersionUID = 1L;
    private JTextArea textArea = new JTextArea(5,20);
    private JLabel japanese = new JLabel("Japanese: " + "\u65e5\u672c\u3041\u3086\u308c\u306e");
     * @param args
    public static void main(String[] args)
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run()
                JFrame frame = new TestTruncateUTF8();
                frame.setVisible(true);
    public TestTruncateUTF8()
        super("Test Truncated");
        JButton truncate17Button = new JButton("Truncate 17 bytes");
        truncate17Button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e)
                truncates(17);
        JButton truncate16Button = new JButton("Truncate 16 bytes");
        truncate16Button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e)
                truncates(16);
        JPanel panel1 = new JPanel();
        panel1.setLayout(new BoxLayout(panel1, BoxLayout.Y_AXIS));
        panel1.add(japanese);
        panel1.add(truncate16Button);
        panel1.add(truncate17Button);
        panel1.add(new JScrollPane(textArea));
        this.setLayout(new BorderLayout());
        this.add(panel1, BorderLayout.CENTER);
        this.pack();
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    private void truncates(int numOfBytesToTruncate)
        try
            byte[] bytes = japanese.getText().getBytes("UTF-8");
            byte[] newBytes = new byte[numOfBytesToTruncate];
            System.arraycopy(bytes, 0, newBytes, 0, numOfBytesToTruncate);
            TestTruncateUTF8.this.putTextInsideJTextArea(bytes, newBytes);
        catch (UnsupportedEncodingException e1)
            e1.printStackTrace();
    private void putTextInsideJTextArea(byte[] original, byte[] truncated)
        try
            textArea.append("\nOriginal String: " + new String(original, "UTF-8"));
            textArea.append("\nTruncated String: " + new String(truncated, "UTF-8"));
            textArea.append("\n*****************************\n");
        catch (UnsupportedEncodingException e)
            e.printStackTrace();
}

Since the byte array is in UTF-8, you can easily examine whether it is corrupt or not by taking a look at the last 4 bytes (at most). That is because the bit distribution of each byte (1st, 2nd, 3rd, and 4th) in UTF-8 encoding is well defined in its spec.
BTW, a Japanese Hiragana/Kanji character typically has 3 bytes in UTF-8, so truncating with neither 16 nor 17 bytes would produce correct truncation.
HTH,
Naoto

How Convert a Byte array to a image format

Hi,
How to convert a Byte array to an image format....I shall be more clear what i want...See i recieve a Byte array fom server this Byte array before recieveing at my end it was converted from an image/text format into a Byte array and is sent from server and, I recieve this Byte array now I have to convert this Byte array into their respective image....please tell me how to convert a Byte array to a image ......... Kindly explain clearly as i am new to Java......
Thanking You.

Note: This thread was originally posted in the [New To Java|http://forums.sun.com/forum.jspa?forumID=54] forum, but moved to this forum for closer topic alignment.

Converting a byte array into int

Here's my problem, I've read my data from a server into a byte array.
the array is 12 elements in length representing three int variables.
int flag;
int query_a;
int query_b;
here's what i receive:
0 0 0 0 34 0 0 -2 21 0 0 0
how do i convert these into the int values i need.
i know the first four are for flag = 0, but how does it convert?
0000 = 0 for each byte
00000000 00000000 00000000 00000000 = 0 for each bit?
or is there a method to convert from a byte to int?

Look at the ByteBuffer class (part of 1.4.1) - before that, you would have had to manually build your integers using left shift and & operator (not that big of a deal, really).
Be sure you know the "Endian"-ness of the platform you are reading data from though, otherwise, your ints will not be what you expect!
- K

Converting a byte array or hex string into DES key

i required to covert a hex represented of DES key into key object for cryptography operation to performed ...
can you help me to find out how to convert a hex representaion of key int DES key object

hi friend,
I think the key size is more than the required size. For DES algorithm, the key size is 64 bit long.But the code u have given has more than 64 bit, because of which this exception has been raised.
Reduce the key value to 64bit and try. If it doesnt work,try the code given below .I think it might be helpful for u
import javax.crypto.*;
import javax.crypto.spec.*;
public class Cryption
     public byte[] encrypt(byte[] keyData,byte[] clearMessage)
          try
               SecretKeySpec sks = new SecretKeySpec(keyData,"DES");
               Cipher c = Cipher.getInstance ("DES");
               c.init(Cipher.ENCRYPT_MODE,sks);
               byte[] encryptedMessage = c.doFinal(clearMessage);
               return encryptedMessage;
          catch(Exception e)
               e.printStackTrace();
          return null;
     public byte[] decrypt(byte[] keyData,byte[] cipherMessage)
          try
               SecretKeySpec sks = new SecretKeySpec(keyData,"DES");
               Cipher c = Cipher.getInstance ("DES");
               c.init(Cipher.DECRYPT_MODE,sks);
               byte[] decryptedMessage = c.doFinal(cipherMessage);
               return decryptedMessage;
          catch(Exception e)
               e.printStackTrace();
          return null;
     public static void main(String[] args)
          String keyString = "ABCDEF12";
          byte keyValue[] = keyString.getBytes();
          Cryption encryption = new Cryption();
          String Message = "Hello Welcome to world of Cryptography";
          System.out.println("Key Value (represented in HEX form): "+keyString);
          System.out.println("Key Value (represented in byte array form): "+keyValue);
          System.out.println("Original Message : "+Message);
          byte[] encryptedMessage = encryption.encrypt(keyValue,Message.getBytes());
          System.out.println("Encrypted Message : "+new String(encryptedMessage));
          Cryption decryption = new Cryption();
          byte[] decryptedMessage = decryption.decrypt(keyValue,encryptedMessage);
          System.out.println("Decrypted Message : "+new String(decryptedMessage));
output :
Key Value (represented in HEX form): ABCDEF12
Key Value (represented in byte array form): [B@43c749
Original Message : Hello Welcome to world of Cryptography
Encrypted Message : "O3�?�M�,��,�]�3��R�?>C$
Decrypted Message : Hello Welcome to world of Cryptography
whenever u use any algorithm, first findout the key size or range that algorithm supports. It is very important
regards,
Deepa Raghuraman

UTF-8 or Windows character set?

I'm putting through RH7 several projects previously produced
in RH5x and RH 6. (Not the WebHelp output, but copies of the
original source projects, launched with RH 7.)
Special characters are a problem. I plan to do some testing.
Maybe it's not the fault of RH, and I need to update my source
files manually for these characters.
But meanwhile, I thought I'd ask these questions:
1. Is there a reason to choose UTF-8 for Windows users? Will
IE and other browsers display UTF-8 correctly in a Windows
environment?
2. If UTF-8 is OK, is there a reason not to choose UTF-8 for
a project previously worked in RH 6 or earlier? I expect RH 7 to
produce the correct output, but it is having a problem with older
special characters in the source files. The corollary question is
whether RH 7 recognizes and converts outdated code for special
characters when they occur in imported html (source project) files.
Thanks.
Harvey

It sounds like your problem is with fonts being replaced. You should start by opening your fontbook application and looking for 1 fonts to disable which will more than likely solve your problem.
Disable this font:
Helvetica Fractions
Here's an article from apple about Helvetica fractions:
http://docs.info.apple.com/article.html?artnum=301245

Reading in any file and converting to a byte array

Okay what I am trying to do is to write a program that will read in any file and convert it into a int array so that I can then manipulate the values of the int array and then re-write the file. Once I get the file into an int array I want to try and compress the data with my own algorithm as well as try to write my own encryption algorithm.
What I have been looking for is code samples that essentially read in the file as a byte array and then I have been trying to convert that byte array into an int array which I could then manipulate. So does anyone have any sample code that essentially takes a file and converts it into an int array and then converts it back into a byte array and write the file. I have found code that is close but I guess I am just too new to this. Any help would be appreciated.

You can read a whole file into a byte array like this:File f = new File("somefile");
int size = (int) f.length();
byte[] contents = new byte[size];
DataInputStream in = new DataInputStream(
new BufferedInputStream(new FileInputStream(f)));
in.readFully(contents);
in.close();Note that you need to add in the proper exception handling code. You could also use RandomAccessFile instead of the DataInputStream.
Writing a byte array to a file is easier; just construct the FileOutputStream, call write on it with the byte array, and close the stream.

Converting Image to Byte Array and then to String

Hi All...
Can anyone please help me. I have got a problem while converting a Byte array of BufferedImage to String.
This is my code, First i convert a BufferedImage to a byte array using ImageIO.wirte
public String dirName="C:\\image";
ByteArrayOutputStream baos=new ByteArrayOutputStream(1000);
BufferedImage img=ImageIO.read(new File(dirName,"red.jpg"));
ImageIO.write(img, "jpg", baos);
baos.flush();
byte[] resultimage=baos.toByteArray();
baos.close();
Then i tried to convert this byte array to a string
String str=new String(resultimage);
byte[] b=str.getBytes();
This much worked fine. But when i reversed this process to re-create the image from that string. i found the image distroted.
BufferedImage imag=ImageIO.read(new ByteArrayInputStream(b));
ImageIO.write(imag, "jpg", new File(dirName,"snap.jpg"));
I got this snap.jpg as distroted.
Please help me i have to convert the image to a string and again i have to re-create the image from that string.

To conver the bytearray to string use base64.encoding
String base64String= Base64.encode(baos.toByteArray());
To convert back use Base64.decode;
byte[] bytearray = Base64.decode(base64String);
BufferedImage imag=ImageIO.read(bytearray);

How do I read directly from file into byte array

I am reading an image from a file into a BuffertedImage then writing it out again into an array of bytes which I store and use later on in the program. Currently Im doing this in two stages is there a way to do it it one go to speed things up.
try
            //Read File Contents into a Buffered Image
            /** BUG 4705399: There was a problem with some jpegs taking ages to load turns out to be
             * (at least partially) a problem with non-standard colour models, which is why we set the
             * destination colour model. The side effect should be standard colour model in subsequent reading.
            BufferedImage bi = null;
            ImageReader ir = null;
            ImageInputStream stream = ImageIO.createImageInputStream(new File(path));
            final Iterator i = ImageIO.getImageReaders(stream);
            if (i.hasNext())
                ir = (ImageReader) i.next();
                ir.setInput(stream);
                ImageReadParam param = ir.getDefaultReadParam();
                ImageTypeSpecifier typeToUse = null;
                for (Iterator i2 = ir.getImageTypes(0); i2.hasNext();)
                    ImageTypeSpecifier type = (ImageTypeSpecifier) i2.next();
                    if (type.getColorModel().getColorSpace().isCS_sRGB())
                        typeToUse = type;
                if (typeToUse != null)
                    param.setDestinationType(typeToUse);
                bi = ir.read(0, param);
                //ir.dispose(); seem to reference this in write
                //stream.close();
            //Write Buffered Image to Byte ArrayOutput Stream
            if (bi != null)
                //Convert to byte array
                final ByteArrayOutputStream output = new ByteArrayOutputStream();
                //Try and find corresponding writer for reader but if not possible
                //we use JPG (which is always installed) instead.
                final ImageWriter iw = ImageIO.getImageWriter(ir);
                if (iw != null)
                    if (ImageIO.write(bi, ir.getFormatName(), new DataOutputStream(output)) == false)
                        MainWindow.logger.warning("Unable to Write Image");
                else
                    if (ImageIO.write(bi, "JPG", new DataOutputStream(output)) == false)
                        MainWindow.logger.warning("Warning Unable to Write Image as JPEG");
                //Add to image list
                final byte[] imageData = output.toByteArray();
                Images.addImage(imageData);


If you don't need to manipulate the image in any way I would suggest you just read the image file directly into a byte array (without ImageReader) and then create the BufferedImage from that byte array.

Byte array to base64encoder problem, cannot encode a 7.7 MB file

hey guys, so ive been trying to use the base64encoder to encode a bytearray which is then sent thru a webservice to the server to be decoded.
and as the subject of this post suggests, i have been having problems encoding a big file,
forexample i tried to upload/convert a 84KB image and it worked just fine... the trace of the string ended with a "==" which i believe means that the conversion is complete...
but when i try to upload a 7.7MB image, it is, i guess, crashing... i dont see any "==" in the string... so i guess its not working... i was wondering if there is any any type of file size limit or soemthign for the encoding...
the code i have is
import flash.events.Event;
import flash.net.FileFilter;
import flash.net.FileReference;
import flash.utils.ByteArray;
import mx.collections.ArrayCollection;
import mx.controls.Alert;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
import mx.utils.Base64Encoder;
import services.images.ImageData;
import services.images.Images;
import services.images.ReturnMessage;
// ActionScript file
    public var fileRef:FileReference = new FileReference();
    public var imgCollection:ArrayCollection = new ArrayCollection();
    public var imgService:Images = new Images();
    public var imageData:ImageData = new ImageData();
    public var returnMsg:ReturnMessage = new ReturnMessage();
    public function onBrowseButtonClicked(event:MouseEvent):void{
        var arr:Array = [];
        arr.push(new FileFilter("Images", ".gif;*.jepg;*.jpg;*.png"));
        fileRef.browse(arr);
        fileRef.addEventListener(Event.SELECT, fileRef_select);
        fileRef.addEventListener(Event.COMPLETE, fileRef_complete);
    public function fileRef_select(event:Event):void{
        fileRef.load();
    public function fileRef_complete(event:Event):void{
        img.source = fileRef.data;
        var fileByteArr:ByteArray = fileRef.data;
        var b64En:Base64Encoder = new Base64Encoder();
        b64En.encodeBytes(fileByteArr);                                                  //<----------------------------------------------------------
        var str:String = b64En.flush();                                                        //<----------------------------------------------------------
        trace(str.length);
        b64En.reset();
        trace("------------------------------------      " + str + "     -----------------------------");
        imageData.Base64EncodedImage = str;
        imageData.FileName = "nameofstring";
        imgService.UploadImage(imageData);
       imgService.addEventListener(FaultEvent.FAULT, servFault);
       imgService.addEventListener(ResultEvent.RESULT, imgServSuccess);
    public function imgServSuccess(event:ResultEvent):void{
        Alert.show("i am in the result");
        returnMsg = event.result as ReturnMessage;
        var resultStr:String = event.result as String;
        Alert.show(resultStr);
        if(returnMsg.ThereWasAnError){
            trace(returnMsg.ErrorMessages.getItemAt(0).toString());
    public function servFault(event:FaultEvent):void{
        Alert.show("2 " + event.fault.message);
        Alert.show("3 " + event.fault.faultCode);
any help will be greatly appretiated!! thanks in advace!

yeah i did actually... except i think i changed a LOT of code since i last posted this article...
so i dont remember where this code is exactly... lol
i have the following code now...
hope this helps
i use a a lot of webservices... so there is some of that code included in there aswell...
* This file will do the file upload. It has been suggested to me multiple times, that using a queueing system for
* file upload is not a good idea. Instead I declared a counter and used the final function to fire the next item
* in the array. this also makes canceling a routine easier.
import flash.events.Event;
import flash.events.ProgressEvent;
import flash.net.FileReference;
import flash.net.FileReferenceList;
import flash.utils.ByteArray;
import mx.collections.ArrayCollection;
import mx.controls.*;
import mx.managers.*;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
import mx.utils.Base64Decoder;
import mx.utils.Base64Encoder;
import services.images.Images;
import valueObjects.*;
    public var t:Number = 0;
    public var fileRef:FileReferenceList = new FileReferenceList();
    public var listCacheFiles:Array = new Array();
    [Bindable] public var fileListArr:Array = new Array();
    [Bindable] public var fileNames:ArrayCollection = new ArrayCollection();
    [Bindable] public var arrUploadFiles:Array = new Array();
    public var file:FileReference;
    public var _numCurrentUpload:Number = 0;
    public var imageData:valueObjects.ImageData;
    public var imageService:Images = new Images();
    public var saveImages:Images;
    public var returnMsg:ReturnMessage = new ReturnMessage();
    public var dataToSave:ImageData;
    public var myCounter:int = 0;
    public var numPerc:Number;
    /*vars to possible delete*/
    public var fileListx:ArrayCollection;
     * Initiates the browse, when files are selected the selectionHandler function is called
    public function initiateBrowse():void{
        var filter:Array = [];
        filter.push(new FileFilter("Images", ".gif;*.jepg;*.jpg;*.png"));
        fileRef.addEventListener(Event.SELECT, selectionHandler);
        fileRef.browse(filter);
     * selection handler takes the selected files and puts them in 2 different arrays
     * fileListArr contains all the file information like the image itself and the name and everything
     * fileNames contains the information essential to populate the datagrid in the cropper.mxml
    public function selectionHandler(event:Event):void{
        //trace("selection Handler ->>");
        fileRef.removeEventListener(Event.SELECT, selectionHandler);
        var numSelected:int = event.target.fileList.length;
        var fileList:Array = event.target.fileList;
        fileListx = new ArrayCollection();
        fileListx = event.target.fileList as ArrayCollection;
        //var oldListLength:Number = fileListArr.length;
        for each(var item:Object in fileList){
            fileListArr.push(item);
            fileNames.addItem({
                num: fileNames.length + 1,
                name: item.name,
                size: formatFileSize(item.size),
                status: "",
                itemDetails: item
        var newListLength:Number = fileListArr.length;
        if(myCounter > 0)
            loopList(myCounter);
        else
            loopList(0);
     * this function starts one, new filereference for each files in the array
    public function loopList(value:int):void{
        //trace("looplist -->");
        if(value < fileListArr.length){
            _numCurrentUpload = value;
            file = new FileReference();
            file = FileReference(fileListArr[value]);;
            file.addEventListener(Event.COMPLETE, loadImage);
            file.addEventListener(ProgressEvent.PROGRESS, fileProgress);
            file.load();
     * This function will convert the byte array into a string, and then it sends it to the server.
    public function loadImage(event:Event):void{
        trace("loadImage -->");
        file.removeEventListener(Event.COMPLETE, loadImage);
            myCounter += 1;
            var fileByteArr:ByteArray = event.target.data;
            var b64En:Base64Encoder = new Base64Encoder();
            b64En.encodeBytes(fileByteArr);
            var str:String = b64En.flush();
            imageData = new ImageData();
            imageData.Base64EncodedImage = str;
            imageData.FileName = event.target.name;
            trace("sending -->> " + imageData.FileName);
            updateStatus("Sending to server");
            imageService.addEventListener(ResultEvent.RESULT, imgServSuccess);
            imageService.UploadImage(imageData);
            b64En.reset();
     * This function will decode the information recieved back from the server.
    public function imgServSuccess(event:ResultEvent):void{
        trace("imgServSuccess -->");
        imageService.removeEventListener(ResultEvent.RESULT, imgServSuccess);
        var returnedImageId:ArrayCollection = new ArrayCollection();
        returnMsg = event.result as ReturnMessage;
        var returnedData:Object = event.result.Images;
        var imgD:ImageData = new ImageData();
        if(returnMsg.ThereWasAnError){
            trace(returnMsg.ErrorMessages.getItemAt(0).toString());
        else{
            for each(var imgData:ImageData in returnedData){
                var decoded:Base64Decoder = new Base64Decoder();
                decoded.decode(imgData.Base64EncodedImage);
                var byteArr:ByteArray = decoded.toByteArray();
                //img.source = byteArr;
            dataToSave = new ImageData();
            dataToSave = returnedData[0];
            listCacheFiles.push(dataToSave);
            updateStatus("Item in Cache");
            //uploadDetails.visible = true;
            loopList(myCounter);
    public var win:itemDetails;
    public function itemClicking(event:Event):void{
        var fileName:String = event.currentTarget.dataProvider[0].name;
        for(var i:Number = 0; i < listCacheFiles.length; i++){
        //var temp:ImageData = event.target as ImageData;
        win = null;
        win = itemDetails(PopUpManager.createPopUp(this, itemDetails, true));
        win.title = "Enter Details";
        PopUpManager.centerPopUp(win);
        win["save"].addEventListener("click", popupClosed);
    public function popupClosed(event:Event):void{
        var returnedData:ImageData = new ImageData;
        returnedData = win.dataToSave;
        saveImgAndData(returnedData);
    public function saveImgAndData(data:ImageData):void{
        saveImages = new Images;
        saveImages.showBusyCursor = true;
        saveImages.addEventListener(ResultEvent.RESULT, savedSuccess);
        saveImages.addEventListener(FaultEvent.FAULT, faultFunc);
        saveImages.SaveUploadedImageInformation(data);
    public function faultFunc(event:FaultEvent):void{
        Alert.show(event.fault.message);
        Alert.show(event.fault.faultString);
    public function savedSuccess(event:ResultEvent):void{
        //trace("savedSuccess -->");
        var retMsg:Object = event.result.Images;
        //trace("saving -->> " + retMsg[0].FileName);
        updateStatus("Completed");
        //loopList(myCounter);
    private function formatFileSize(numSize:Number):String {
        var strReturn:String;
        numSize = Number(numSize / 1024);
        strReturn = String(numSize.toFixed(1) + " KB");
        if (numSize > 1024) {
            numSize = numSize / 1024;
            strReturn = String(numSize.toFixed(1) + " MB");
            if (numSize > 1024) {
                numSize = numSize / 1024;
                strReturn = String(numSize.toFixed(1) + " GB");
        return strReturn;
    public function removeFiles():void{
        var arrSelected:Array = displayFilesList.selectedIndices;
        if(arrSelected.length >= 1){
            for(var i:Number = 0; i < arrSelected.length; i++){
                fileNames[Number(arrSelected[i])] = null;
            var idx:int = 1;
            for(var j:Number = 0; j < fileNames.length; j++){
                if(fileNames[j] == null){
                    fileNames.removeItemAt(j);
                    j--;
                }else{
                    fileNames[j].num = idx++;
            if(fileNames.length > 0)
                displayFilesList.selectedIndex = 0;
            else
                displayFilesList.selectedIndex = -1;
            _numCurrentUpload--;
            updateProgBar();
    private function updateStatus(status:String, index:Number = -1):void{
        index = _numCurrentUpload;
        fileNames[index].status = status;
        displayFilesList.invalidateList();
    public function fileProgress(event:ProgressEvent):void{
        //trace("fileProgress -->");
        var numPerc:Number = Math.round((Number(event.bytesLoaded) / Number(event.bytesTotal)) * 100);
        updateStatus("Uploading: " + numPerc.toString() + "%");
        updateProgBar(numPerc);
        var evt:ProgressEvent = new ProgressEvent("uploadProgress", false, false, event.bytesLoaded, event.bytesTotal);
        dispatchEvent(evt);
    public function updateProgBar(numPerc:Number = 0):void{
        //trace("updateProgBar -->");
        var strLabel:String = (_numCurrentUpload + 1) + "/" + fileNames.length;
        progBar.label = strLabel;
        progBar.setProgress(_numCurrentUpload + numPerc / 100, fileNames.length);
        progBar.validateNow();

Byte Array from SQL Reporting Service

I am calling the Render method of the Microsoft SQL Reporting
Service's ReportExecution web service. It returns a Byte array in
the lastResult object. I am having the hardest time figuring out a
way to convert that byte array into something I can use in Flex.
The byte array, once converted into a more user friendly format,
will contain the rendered version of a SQL Report in whatever
format I have specified...in this case it is XML. Any input or
suggestions would be appreciated.

This is a little late, I know. but I just spent the day
struggling with this very issue. Hopefully this can help someone
else in the future. Here's my solution...
on MX:Operation -- result="fillXML()"
then
private function fillXML(): void {
var x:XML = new
XML(wsProps.GetDatasetData.lastResult.toString());
...do what you need with your xml...
I use an XMLList node of the result as the source property
for an XMLListCollection bound to a datagrid. Let me know if you
need more help to get it working. It works like a charm now that I
figured that out. I don't know if it's a slimy hack, or not, but it
gets the job done.

How to create PNG file from byte array of RGB value?

Hi
Here is my problem.
I have drawn some sketchs (through code in runtime) on canvas. I have grabbed the RGB information for the drwan image and converted to byte array.
I have to pass this byte array to server and generate a png file and save.
Please help.

{color:#ff0000}Cross posted{color}
http://forum.java.sun.com/thread.jspa?threadID=5218093
{color:#000080}Cross posting is rude.
db{color}

Converting a byte[] back to key problem

I CAN create a key and convert the key to a byte array, then convert the array to a string(base 64):
KeyGenerator generator = KeyGenerator.getInstance("DES");
generator.init(new SecureRandom());
key = generator.generateKey();
byte[] keyBytes = key.getEncoded;
BASE64Encoder encoder = new BASE64Encoder();
String randomKey = encoder.encode(keyBytes);
and I CAN save that string to a database, forget about it, then sometime later reload it and convert it to a byte array again:
String loadedKey = "WhAt3Ver-It-I5" //from DB
BASE64Decoder decoder = new BASE64Decoder();
byte[] loadedKeyBytes = decoder.decodeBuffer(loadedKey);
what I CAN'T do is convert the loadedKeyBytes back into the key of the same type as it was originally, enabling me to decrypt whatever that key originally encrypted.
Does anyone know.
I know I need to convert it to a KeySpec, I presume as:
DESKeySpec keySpec = new DESKeySpec(loadedKeyBytes);
this compiles correctly.... but how do i then recreate the key so i can use it for decryption.
Once i've finished this test program I should be able to port it to my application.
Many thanks in advance guys!
Cheers!
Relisys
================ CODE FOLLOWS ======================
import java.io.*;
import java.security.*;
import java.security.spec.*;
import javax.crypto.*;
import javax.crypto.spec.*;
import com.sun.crypto.provider.SunJCE;
import sun.misc.*;
public class SecPrescrip {
public static void main(String[] args) throws Exception {
// Create Key.
Key key;
KeyGenerator generator = KeyGenerator.getInstance("DES");
generator.init(new SecureRandom());
key = generator.generateKey();
// Get a cipher object
Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
// Encrypt the input string:
cipher.init(Cipher.ENCRYPT_MODE, key);
String input = "Medicare Secure Prescription: 30 Tamazopan 200mg tablets. Dosage: 1 to be taken every 4 hours";
System.out.println("Stage 1: ENCRYPT PRESCRIPTION WITH A RANDOM DES KEY");
System.out.println("===================================================");
System.out.println(" - Input Plain Text: "+input);
System.out.println("");
byte[] stringBytes = input.getBytes("UTF8");
byte[] raw = cipher.doFinal(stringBytes);
BASE64Encoder encoder = new BASE64Encoder();
String ciphertext1 = encoder.encode(raw);
System.out.println(" - Cipher Text: "+ciphertext1);
System.out.println("");
byte[] keybytes = key.getEncoded();
String randomkey = encoder.encode(keybytes);
System.out.println(" - Random Prescription Key: "+randomkey);
System.out.println("");
System.out.println("ENCRYPTION SUCESSFULL");
System.out.println("");
System.out.println("");
System.out.println("Stage 2: ENCRYPT RANDOM KEY WITH PATIENT MEDICARE KEY");
System.out.println("=====================================================");
BASE64Decoder decoder = new BASE64Decoder();
String passphrase = "ABCD1234efghIJ56"; //Patient Medicare Key
System.out.println(" - Patient Medicare Key: "+passphrase);
System.out.println("");
System.out.println(" - Input Plain Text: "+randomkey);
String algorithm = "PBEWithMD5AndDES";
byte[] salt = new byte[8];
int iteration = 20;
KeySpec ks = new PBEKeySpec(passphrase.toCharArray());
SecretKeyFactory skf = SecretKeyFactory.getInstance(algorithm);
SecretKey key2 = skf.generateSecret(ks);
byte[] input2 = decoder.decodeBuffer(randomkey);
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(passphrase.getBytes());
md.update(input2);
byte[] digest = md.digest();
System.arraycopy(digest, 0, salt, 0, 8);
AlgorithmParameterSpec aps = new PBEParameterSpec(salt, iteration);
cipher = Cipher.getInstance(algorithm);
cipher.init(Cipher.ENCRYPT_MODE, key2, aps);
byte[] outputFinalKey = cipher.doFinal(input2);
String ciphertext2 = encoder.encode(outputFinalKey);
String saltString = encoder.encode(salt);
String encryptedCiphertext = saltString+ciphertext2;
System.out.println("");
System.out.println(" - Cipher Text (Final Prescription Key): "+ciphertext2);
System.out.println("");
System.out.println(" - Salt: "+saltString);
System.out.println("");
System.out.println(" - Full Encrypted Output: "+encryptedCiphertext);
System.out.println("");
System.out.println("ENCRYPTION SUCESSFULL");
System.out.println("");
System.out.println("");
System.out.println("Stage 3: DECRYPT PRESCRIPTION KEY USING PATIENT MEDICARE KEY");
System.out.println("============================================================");
//NOT CHANGED String passphrase = "ABCD1234efghIJ56";
System.out.println(" - Patient Medicare Key: "+passphrase);
System.out.println("");
System.out.println(" - Input Plain Text: "+ciphertext2);
algorithm = "PBEWithMD5AndDES";
salt = new byte[8];
iteration = 20;
ks = new PBEKeySpec(passphrase.toCharArray());
skf = SecretKeyFactory.getInstance(algorithm);
SecretKey key3 = skf.generateSecret(ks);
//Load in the input bytes as if they had been loaded from an sql database or the like
String saltIn = encryptedCiphertext.substring(0,12);
String ciphertext3 = encryptedCiphertext.substring(12,encryptedCiphertext.length());
byte[] saltArray = decoder.decodeBuffer(saltIn);
byte[] ciphertextarray = decoder.decodeBuffer(ciphertext3);
aps = new PBEParameterSpec(saltArray, iteration);
cipher = Cipher.getInstance(algorithm);
cipher.init(Cipher.DECRYPT_MODE, key3, aps);
byte[] outputKey2 = cipher.doFinal(ciphertextarray);
String plaintext2 = encoder.encode(outputKey2);
System.out.println(" - Plain Text (Random Generated Key): "+plaintext2);
System.out.println("");
System.out.println("");
System.out.println("ENCRYPTION SUCESSFULL");
System.out.println("");
System.out.println("");
System.out.println("Stage 4: DECRYPT PRESCRIPTION KEY USING PATIENT MEDICARE KEY");
System.out.println("============================================================");
// The decrypter string plaintext should be the same as the BASE64 Encoded representation of the random DES string
byte[] randomKeyFetched = decoder.decodeBuffer(plaintext2);
generator = KeyGenerator.getInstance("DES");
DESKeySpec keyspec = new DESKeySpec(randomKeyFetched);
* Stuck here! Once the key is reformed it will be complete!
}

You need to use a SecretKeyFactory to convert the byte array back to a SecretKey to use in decryption. Continuing your example:
SecretKeyFactory skf = SecretKeyFactory.getInstance("DES");
DESKeySpec desKeySpec = new DESKeySpec(loadedKeyBytes);
SecretKey sk = skf.generateSecret(desKeySpec);
Use sk in the call to the Cipher init() function. (Note that you don't call KeyGenerator to restore a key from its bytes.)
Incidently, if you're using ECB mode for encryption I don't think you need to worry about the Initialization Vector. However, if you're using CBC mode (which is the default DES mode for the default SunJCE provider), I believe you also have to make sure that the decryption system starts from the same Initialization Vector that was used for encryption. To deal with this, if 'cipher' is your encryption Cipher object, then you call
byte bytIV[] = cipher.getIV();
to get the 8-byte IV array. To decrypt, you need to call:
IvParameterSpec iv = new IvParameterSpec(bytIV);
This is an AlgorithmParameterSpec, and can be used as the third argument to the init() function for Cipher to set up decryption, e.g.
Cipher cd = Cipher.getInstance("DES/ECB/PKCS5Padding");
cd.init(Cipher.DECRYPT_MODE, sk, iv);
I believe that CBC mode is more secure than ECB mode when you have more than 8 bytes of material to encode (e.g. use "DES/CBC/PKCS5Padding"
when you create the Cipher objects).
To simplify things a bit, you might just want to use a fixed 8-byte Initialization Vector by constructing a IvParameterSpec and using it for all DES encryption and decryption.
The documentation on all of this is extraodinarily obscure.

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