I have to Implement My Own Keys To Track Session

Developers,
In order to track session requests, similar to HTTP server session in an RMI application is is neccessary to have to append a unique random key with each request that the user may make?
I see no other way around this and it seems like something which should be available in the API.
Thanks

Why do you think a custom application requirement should be part of the RMI specification? Unique Id has nothing to do with RMI, it is an application issue and properly belongs in an application container.
See the Tymeac projects on SourceForge.net for such a container.
http://www.coopsoft.com/JavaProduct.html

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How can i implement "my own" security in ADF 11g

Hi everybody,
I have a problem and hope anyone could help me...
Currently i am developing a ADF application, and i want to implement the security... the problem i have (and i read a lot of posts in the forum and other blogs and i don't found anything that help me) is that the "validation" of the user of password is with a webservice..... and the "roles" of the application are given to me with another web service.
I read a lot and in the Fusion's Developer Guide in chapter 30 (Enabling ADF Security in a Fusion Web Application) explains very good how to implement the security in the application, but, that example really doesn't work for my problem.
I wan't to know any way to in the "doLogin" action of my "Login button in my login page" to implement my own logic.
public String doLogin() {
2 String un = _username;
3 byte[] pw = _password.getBytes();
4 FacesContext ctx = FacesContext.getCurrentInstance();
5 HttpServletRequest request =
6 (HttpServletRequest)ctx.getExternalContext().getRequest();
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8 try {
9 Subject mySubject = Authentication.login(handler); <<----------------------------- Here i wan't to invoke the WS that validate the user and pwd.
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12 ctx.getViewRoot().getViewId();
13 HttpServletResponse response =
14 (HttpServletResponse)ctx.getExternalContext().getResponse();
15 sendForward(request, response, loginUrl);
16 } catch (FailedLoginException fle) {
17 FacesMessage msg = new FacesMessage(FacesMessage.SEVERITY_ERROR,
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19 "An incorrect Username or Password" +
20 " was specified");
21 ctx.addMessage(null, msg);
22 } catch (LoginException le) {
23 reportUnexpectedLoginError("LoginException", le);
24 }
25 return null;
26 }
And i wan't to know if i can save some other user information in some kind of session (like company, mail and other stuff).....
And when i can login validating usr and pwd from the WS... how could i manage my roles ?
Welll i hope anyone can help me.
Regards from Mexico.

Hi,
to do this, you create a JAAS Login Module to authenticate against the Web Service. This then you wrap in an authentication provider that you configure with WLS. ADF Security does not perform any authentication itself and instead leaves it for the container.
http://download.oracle.com/docs/cd/E17904_01/web.1111/e13718/atn.htm#i1154044
Frank

Set my own key instead of using KeyGenerator.generateKey() - how?

How can I set my own key instead of using KeyGenerator.generateKey()?
I don´t see any method that is alowing this.

I have now tried my own.
To send encrypted data through a CipherOutputStream, I have done this:
private File file;
        private CipherOutputStream cos;
        private Cipher cipher;
        private PBEKeySpec key;
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        public void run()
            byte [] mybytearray = new byte [(int)file.length()];
            try
                fis = new FileInputStream(file);
                bis = new BufferedInputStream(fis);
                bis.read(mybytearray,0,mybytearray.length);
                OutputStream os = socket.getOutputStream();
                cos = new CipherOutputStream(os, cipher);
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                int length = mybytearray.length;
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private Socket sock;
        private DataInputStream din;
        private CipherInputStream cin;
        private BufferedOutputStream out_file;
        private Cipher cipher;
        private PBEKeySpec key;
        private char[] password = "test".toCharArray();
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                            out_file = new BufferedOutputStream(new FileOutputStream("received_file.txt"));
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                                out_file.write(inputLine);
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                        catch(Exception err){err.printStackTrace();}When I run the application, I get this error:
java.security.InvalidKeyException: requires PBE parameters.
Why?

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Hi,
I'm trying to implement my own linked list structure oftype String. It will eventually go to form a simple text editor, with each line of a file being loaded into its own String node.
However, im having problems implementing the list itself :)
So far ive got the file to read in succesfully, but now im stuck...how do i load up a line into a new node? and what about the head/tail nodes, they just confuse me! Do i have to write a seperate 'List' class and create an object of that, much like the LinkedList class with Java?
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TIA
andrew
PS code below ...
=================================
=================================
import java.io.*;
import java.util.*;
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You wouldn't by any chance be doing computer science at Cardiff university would you and have been given this as an assignment?

Can we have more than one primary key constraint to a Oracle Table?

Hi,
Can we have more than one primary keys to a single table in oracle? ( Not the composite key)
Please somebody answer..
Regards,
Alaka

811935 wrote:
Can we have more than one primary keys to a single table in oracle? ( Not the composite key)
In principle a table can have multiple keys if you need them. It is a very strong convention that just one of those keys is designated to be "primary" but that's just a convention and it doesn't stop you implementing other keys as well.
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How to insert my own key

Hi,
i using the following code to encypt a string, but i now i need to encrypt using my own key, what i have to change in this code to make that possible...
String message="test";
KeyGenerator kgen = KeyGenerator.getInstance("Rijndael");
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OK, try this:
import java.math.BigInteger;
byte[] raw = new
BigInteger("c9536544-9b54-4986-75a1-45982b69587c".repl
aceAll("-","")).toByteArray();
This does not really work. It tries to convert the key using base 10, not base 16, and it puts a leading zero in the byte array so produces a 17 byte key. See for example
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It would be better to use one of the free Hex decoders out there. I use 'jakarta commons codec'. Google will find it.

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Thanks
Ian

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Hi!
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Specifying my own keys..

hello..
i need to specify my own key when creating one, can i do that? The only thing i keep reading is like this code:
KeyGenerator generator = KeyGenerator.getInstance("DES");
key = generator.generateKey();
where a a KeyGenerator generates a key for me.
can't i specify the key that i want instead of it generating for me ?
thanks.

hello again..
isnt this code alone enough:
SecretKey testKey = new SecretKeySpec(byteArray, "RC4"); ??
or must i use the SecretKeyFactory class as well?
and i have this following code i want to post, i want to do brute force decryption of an RC4 encrypted string, but its not always working with me, specifically it only works when i set Key size to 8 bits. i read RC4 has no limits on key size so i guess that should work though, here is the code, if i set keysize to something like 10, while loop never stops, am i wrong somewhere:
import java.math.*;
import javax.crypto.*;
import javax.crypto.spec.*;
public class RC4EncDec
    public static void main(String[] args)
        try
            KeyGenerator kgen = KeyGenerator.getInstance("RC4");
            kgen.init(8);
            SecretKey key = kgen.generateKey();
            RC4 encrypter = new RC4(key);
            String encryptedString = encrypter.encrypt("Hello World");
            BigInteger big = new BigInteger("-128", 10);
            byte[] possibleKey = big.toByteArray();
            SecretKey testKey = new SecretKeySpec(possibleKey, "RC4");
            encrypter = new RC4(testKey);
            String decryptedString = encrypter.decrypt(encryptedString);
            int c = 0;
            while (!(decryptedString.equals("Hello World")))
                c++;
                System.out.println(big.toString(2));
                big = big.add(new BigInteger("1"));
                possibleKey = big.toByteArray();
                testKey = new SecretKeySpec(possibleKey, "RC4");
                encrypter = new RC4(testKey);
                decryptedString = encrypter.decrypt(encryptedString);
            System.out.println("Found '" + decryptedString + "' after " + c + " iterations");
            System.out.println("The decryption key was: " + big.toString(2));
        catch (Exception e)
            e.printStackTrace();
class RC4
    Cipher encCipher;
    Cipher decCipher;
    RC4(SecretKey key)
        try
            encCipher = Cipher.getInstance("RC4");
            decCipher = Cipher.getInstance("RC4");
            encCipher.init(Cipher.ENCRYPT_MODE, key);
            decCipher.init(Cipher.DECRYPT_MODE, key);
        catch (Exception e)
    public String encrypt(String str)
        try
            // Encode the string into bytes using utf-8
            byte[] utf8 = str.getBytes("UTF8");
            // Encrypt
            byte[] enc = encCipher.doFinal(utf8);
            // Encode bytes to base64 to get a string
            return new sun.misc.BASE64Encoder().encode(enc);
        catch (Exception e)
        return null;
    public String decrypt(String str)
        try
            // Decode base64 to get bytes
            byte[] dec = new sun.misc.BASE64Decoder().decodeBuffer(str);
            // Decrypt
            byte[] utf8 = decCipher.doFinal(dec);
            // Decode using utf-8
            return new String(utf8, "UTF8");
        catch (Exception e)
        return null;
}i installed the bouncyCastle provider to use its RC4. is my code correct? is that the way a brute force check should happen. some parts are from Java Almanac.
thanks...

Implement my own password field

I have implemented my own "password" field.
I catch the before_action of the et_KEY_DOWN event, check for the delete and backspace, displays an '*' or clears the field and bubbleevent is false.
my code is below.
If pVal.CharPressed = 8 Or pVal.CharPressed = 46 Then
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   oApp.Forms.Item(FormUID).Items.Item "pincode").Specific.string = ""
Else
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    pincode += Chr(pVal.CharPressed)
End If
BubbleEvents = False
My problem is that the cursor stays at the beginning of my field.
How can I move it to the end of this field.

anyway, how do you handle such features, as a:
input of character in the middle of password ???
for example:
I want to type in my password "asdf" and I've made a typo and I'm sure, that I've forgot to type the "s", so in the password field, I have the "***"-"adf" thus, I move right after the first char and press the "s" (or copy/paste the string containing the "s" or whatever) ... what happends ? you add the "s" at the end of your pincode ... and ups, you have the "adfs" instead of "asdf" ...
and more problems appear ... when:
user marks (using mouse, or shift+movement_arrows) more chars, and inputs the desired char/string ...
This was the reason ... why I'm using a linkedbutton, which opens new form, with empty editbox, to type in the password ... fully visible, ofcourse ...

Do We Have Multiple Implementations

Do We Have Multiple Implementations for all the Badi's. or any exceptions

Hi,
There is no limitation for implementing BADI's
We can have multiple implementations for BADI
that property of BADI makes it different from user exits
see the BADI Doc
DEFINING THE BADI
1) execute Tcode SE18.
2) Specify a definition Name : ZBADI_SPFLI
3) Press create
4) Choose the attribute tab. Specify short desc for badi.. and specify the type :
multiple use.
5) Choose the interface tab
6) Specify interface name: ZIF_EX_BADI_SPFLI and save.
7) Dbl clk on interface name to start class builder . specify a method name (name,
level, desc).
Method level desc
Linese;ection instance methos some desc
8) place the cursor on the method name desc its parameters to define the interface.
Parameter type refe field desc
I_carrid import spfli-carrid some
I_connid import spefi-connid some
9) save , check and activateadapter class proposed by system is
ZCL_IM_IM_LINESEL is genereated.
IMPLEMENTATION OF BADI DEFINITION
1) EXECUTE tcode se18.choose menuitem create from the implementation menubar.
2) Specify aname for implementation ZIM_LINESEL
3) Specify short desc.
4) Choose interface tab. System proposes a name fo the implementation class.
ZCL_IM_IMLINESEL which is already generarted.
5) Specify short desc for method
6) Dbl clk on method to insert code..(check the code in AAA).
7) Save , check and activate the code.
Some useful URL
http://www.esnips.com/doc/e06e4171-29df-462f-b857-54fac19a9d8e/ppt-on-badis.ppt
http://www.esnips.com/doc/10016c34-55a7-4b13-8f5f-bf720422d265/BADIs.pdf
http://www.esnips.com/doc/43a58f51-5d92-4213-913a-de05e9faac0d/Business-Addin.doc
http://www.esnips.com/doc/1e10392e-64d8-4181-b2a5-5f04d8f87839/badi.doc
www.sapgenie.com/publications/saptips/022006%20-%20Zaidi%20BADI.pdf
http://www.sapdevelopment.co.uk/enhance/enhance_badi.htm
http://help.sap.com/saphelp_nw04/helpdata/en/04/f3683c05ea4464e10000000a114084/content.htm
http://help.sap.com/saphelp_nw04/helpdata/en/e6/d54d3c596f0b26e10000000a11402f/content.htm
http://help.sap.com/saphelp_nw2004s/helpdata/en/c2/eab541c5b63031e10000000a155106/frameset.htm
Now write a sample program to use this badi method..
Look for BBB sample program.
AAA
data : wa_flights type sflight,
it_flights type table of sflight.
format color col_heading.
write:/ 'Flight info of:', i_carrid, i_connid.
format color col_normal.
select * from sflight
into corresponding fields of table it_flights
where carrid = i_carrid
and connid = i_connid.
loop at it_flights into wa_flights.
write:/ wa_flights-fldate,
wa_flights-planetype,
wa_flights-price currency wa_flights-currency,
wa_flights-seatsmax,
wa_flights-seatsocc.
endloop.
BBB
*& Report ZBADI_TEST *
REPORT ZBADI_TEST .
tables: spfli.
data: wa_spfli type spfli,
it_spfli type table of spfli with key carrid connid.
*Initialise the object of the interface.
data: exit_ref type ref to ZCL_IM_IM_LINESEL,
exit_ref1 type ref to ZIF_EX_BADISPFLI1.
selection-screen begin of block b1.
select-options: s_carr for spfli-carrid.
selection-screen end of block b1.
start-of-selection.
select * from spfli into corresponding fields of table it_spfli
where carrid in s_carr.
end-of-selection.
loop at it_spfli into wa_spfli.
write:/ wa_spfli-carrid,
wa_spfli-connid,
wa_spfli-cityfrom,
wa_spfli-deptime,
wa_spfli-arrtime.
hide: wa_spfli-carrid, wa_spfli-connid.
endloop.
at line-selection.
check not wa_spfli-carrid is initial.
create object exit_ref.
exit_ref1 = exit_ref.
call method exit_ref1->lineselection
EXPORTING
i_carrid = wa_spfli-carrid
i_connid = wa_spfli-connid.
clear wa_spfli.
<b>Reward points</b>
Regards

When my Mac Book Pro is asleep and I lift the lid it sometimes goes dark. I have to press the F2 key to get the screen again. Is this a problem?

When my Mac Book Pro is asleep and I lift the cover the screen goes dark and I have to press the F2 key to get it back. What do I need to do to prevent this?

Try this, may help.
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2. Reset SMC.     http://support.apple.com/kb/HT3964
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Just download and install.
you can find by internet search for "download Lightroom", or click here:
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Is it possible to have your whole family on one apple id or is it better to have each person have there own? If each has their own does each id have to buy their own music and apps? How does find my iphone work with one apple id or two?

Is it possible to have your whole family on one apple id or is it better to have each person have there own? If each has their own does each id have to buy their own music and apps? How does find my iphone work with one apple id or two? also I am going to be going off to college soon should I make an itunes id for my self and how will I get all the music from the old id?

Is it possible to have your whole family on one apple id or is it better to have each person have there own?
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If each has their own does each id have to buy their own music and apps?
Yes, all purchases are non-transferable.
How does find my iphone work with one apple id or two?
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I have to Implement My Own Keys To Track Session

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