Updated Code:
public NodeList getRoutingDoc(){
URL url;
NodeList nl = null;
try{
String xmlFeed = context.getString(R.string.xml_feed) +
IMEI + ".xml";
try {
url = new URL(xmlFeed);
URLConnection urlConnection;
urlConnection = url.openConnection();
HttpURLConnection httpConnection = (HttpURLConnection)
urlConnection;
int responseCode = httpConnection.getResponseCode();
if(responseCode == HttpURLConnection.HTTP_OK){
String bytes = toHex("XXXX");
Key skeySpec = new SecretKeySpec(toByte(bytes), "AES");
InputStream in = httpConnection.getInputStream();
System.out.println(toByte(bytes));
Cipher c = Cipher.getInstance("AES/CFB8/NoPadding");
c.init(Cipher.DECRYPT_MODE, skeySpec, new
IvParameterSpec(toByte(bytes)));
CipherInputStream cis = new CipherInputStream(in, c);
cis.read(new byte[16]);
BufferedReader br = new BufferedReader(new
InputStreamReader(cis));
System.out.println("Got message");
System.out.println(br.readLine());
DocumentBuilderFactory dbf;
dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document dom = db.parse(in);
//cis.close();
Element docEle = dom.getDocumentElement();
nl = docEle.getElementsByTagName(TAG_CHAR);
}
}
catch (MalformedURLException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvalidAlgorithmParameterException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchPaddingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
finally{
}
return nl;
}
I have updated my code to the latest version I have.
I am now using the CipherInputStream properly I think and getting the file
in but the System.out.println gives me the following output:
INFO/System.out(7880): � =k�K V� a ��_|F��(#
-ï¿½Ñ ï¿½ �u ���n�| �� ~��� �9�< Ã�|T��sU
Wlj�9�qeo� M%�t�V�V�3Q" �
T�Yq?��E��� �H%f
o���M�un��-���ȓ������<d��{���{�!
�[&��%��M �.�jq+��,�b�����
��~����)� �*ܨ )��> ��i���b�_"��F)�`"�
So it looks as if its no decrypting it at all or not decrypting it
properly??
Can anyone see what I am doing wrong?
On Fri, Sep 24, 2010 at 10:44 AM, draf...@gmail.com <draf...@gmail.com>wrote:
> 0 down vote favorite
>
>
> I am trying to to download and decrypt an encrypted XML file.
>
> I have implemented the download part and have tested with an
> unencrypted file and it works fine.
>
> However I now need to be able to download an XML file that has been
> encrypted using AES and the key "XXXX"
>
> So I am only concerned with decryption as the encryption on the XML
> file is already done.
>
> Here is my code so far:
>
> public NodeList getXMLDoc(){
> URL url;
> NodeList nl = null;
>
> try{
> String xmlFeed = context.getString(R.string.xml_feed);
> try {
> url = new URL(xmlFeed);
> URLConnection urlConnection;
> urlConnection = url.openConnection();
> HttpURLConnection httpConnection = (HttpURLConnection)
> urlConnection;
> int responseCode = httpConnection.getResponseCode();
>
> if(responseCode == HttpURLConnection.HTTP_OK){
>
> String bytes = toHex("XXXX");
> SecretKeySpec skeySpec = new
> SecretKeySpec(toByte(bytes), "AES");
> try {
> c.init(Cipher.DECRYPT_MODE, skeySpec);
> //c.doFinal();
> } catch (InvalidKeyException e) {
> e.printStackTrace();
> }
> InputStream in = httpConnection.getInputStream();
> CipherInputStream cis = new CipherInputStream(in,
> c);
> DocumentBuilderFactory dbf;
> dbf = DocumentBuilderFactory.newInstance();
> DocumentBuilder db = dbf.newDocumentBuilder();
>
> Document dom = db.parse(cis);
>
> Element docEle = dom.getDocumentElement();
>
> nl = docEle.getElementsByTagName(TAG_CHAR);
>
> }
> }
> catch (MalformedURLException e) {
>
> e.printStackTrace();
> }
> catch (IOException e) {
>
> e.printStackTrace();
> } catch (ParserConfigurationException e) {
>
> e.printStackTrace();
> } catch (SAXException e) {
>
> e.printStackTrace();
> }
> }
> finally{
>
> }
> return nl;
> }
>
> At the minute I am trying to decrypt the whole file using
> CipherInputStream is this the correct approach?
>
> My code above gives me the following exception:
>
> WARN/System.err(5274): java.io.IOException: last block incomplete in
> decryption
>
> Is this a setup error or what might be causing this error?
>
> Are there any tutorials on how to decrypt an XML file in Android/Java?
>
> Am I going in the right direction as to how to decrypt the file or is
> my code completely wrong?
>
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