Steganography Application

Hi all,
im developing a steganography application in java as part of my final year project for college. when its done im going to need some people to test it and evaluate it honestly for me.
if anyones interested would they please post a reply and ill get them a developmental version soon.
Thanks guys+gals
Garreth-Dublin,Ireland

Hi,
Steganography is the art of hidden writing, or hidden messages in modern terms.
The application i am developing uses the redundancy in image file formats to hide messages, maybe strings, other files or anyother digital media.
I know that steganography is not in your typical dictionary but then java developers are not your typical people either.
Thanks for your interest jboozer

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Steganography - Rasters

Hi all,
Im building a steganography application which decodes a jpeg as a raster using JpegImageDecoder, then splits it up into 8*8 blocks, passes each block through the Discrete Cosine Transform, embeds a secret message in the lsb of the dc coefficient and inverses the process, ultimately saving back as a raster and encoding as a jpeg.
Problem - when saving back as a raster all my double values are rounded and this loss in precision means that i cannot extract my embedded message!
Can anyone think of a solution to saving double values (ie. for Red Green Blue) into a raster or bufferedImage?
Cheers
Cathal

Multiple cross post - http://forum.java.sun.com/thread.jspa?threadID=616328&messageID=3431197#3431197

Library or any sort of source code for replacement of selcted frames in the video

for my video steganography application i have to replce the embedded frames with the orignal frames of the video i am using avi file library but it is not working it is giving exceptions ....so i need any other suggestions or help

This forum supports setup of the .NET Framework.
You appear to have a question about .avi file editing. Assuming you are developing a .NET application, this CodeProject article may be of some use to you:
http://www.codeproject.com/Articles/7388/A-Simple-C-Wrapper-for-the-AviFile-Library
For further help (assuming, again, that you are developing a .NET app), I suggest you ask here:
For VB:
http://social.msdn.microsoft.com/Forums/en-US/vbgeneral/threads
For C#:
http://social.msdn.microsoft.com/Forums/en-US/csharpgeneral/threads

How to replce the selected frames of the video

for my video steganography application i have to replce the embedded frames with the orignal frames
of the video i am using avi file library but it is not working it is giving exceptions ....so i need any other suggestions or help

Hello,
This forum is used to discuss and ask questions about .NET Framework Base Classes (BCL) such as Collections, I/O, Regigistry, Globalization, Reflection. Also discuss all the other Microsoft libraries that are built on or extend the .NET Framework, including
Managed Extensibility Framework (MEF), Charting Controls, CardSpace, Windows Identity Foundation (WIF), Point of Sale (POS), Transactions.
Thanks for your understanding.
Regards.
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
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HERE to participate the survey.

SSO to partner application running under IIS

Hi,
We have a complete set-up for 9iAS Release2 where some applications are running. In parallell we have an application running under IIS, and would now like to enable the IIS application as a partner application to 9iAS letting the 9iAS SSO server handle the authentication.
In the documentation of Oracle Proxy Plug-in I read that this proxy plug-in can be used to proxy requests from IIS to Oracle http server (OHS) and also in this way enable SSO.
My question is if this can be done only for applications running under 9iAS but having IIS as web server, or if it is also possible like in our case to enable SSO via the proxy plug-in to applications runnind under IIS?
If this is not supported is the only available solution to use the SSO SDK in my IIS application?
Thanks and regards,
Rikard

Here's a DIY answer.
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Add message to application log
CALL FUNCTION 'BAL_LOG_MSG_ADD'
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Hi Jay,
Did you see BAL_LOG_EXCEPTION_ADD?
This FM is represented by the structure BAL_S_EXC. This can have various versions as described below:
Data of BAL_S_EXC Structure / Use
EXCEPTION / Exception class from which an exception text
 is added to the log. This field must be filled.
MSGTY / Message type (MSGTY) of a T100 message.
 This field must also be filled for exceptions.
PROBCLASS,
DETLEVEL,
ALSORT, TIME_STMP / Message or exception attributes, such as
 problem class (PROBCLASS, for
 example, "very important"), level of detail
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Follow the link below for more details:
<a href="http://help.sap.com/saphelp_nw04/helpdata/en/d6/5d7f38f52f923ae10000009b38f8cf/frameset.htm">SAP Help DOc</a>
Hope this helps.
Thanks
Sanjeev

If-statement in application-process

Hi,
First I will tell you which APEX I am using: 3.0.1
Ok, I have got a form where there are 4 fields:
P13_ACCTNO (Popup LOV (fetches first rowset)),
P13_LOCATION_NAME(Text Field (Disabled, saves state)),
P13_COMP_ACCTNO( Popup LOV (fetches first rowset)),
P13_LOCATION(Text Field (Disabled, saves state))
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end if;
But I don't know how to put this into the following code, because it is a mixture, which I don't understand completely.
DECLARE
v_acctno primemines.acctno%type;
v_company primemines.company%type;
v_mineloc primemines.mineloc%type;
v_commodity primemines.commodity1%type;
v_null varchar2(5);
CURSOR cur_c
IS
SELECT acctno, mineloc, company, commodity1
FROM primemines
WHERE acctno = TO_NUMBER (:temporary_application_item);
BEGIN
FOR c IN cur_c
LOOP
v_acctno := c.acctno;
v_company := c.company;
v_mineloc := c.mineloc;
v_commodity :=c.commodity1;
END LOOP;
v_null := '';
OWA_UTIL.mime_header ('text/xml', FALSE);
HTP.p ('Cache-Control: no-cache');
HTP.p ('Pragma: no-cache');
OWA_UTIL.http_header_close;
HTP.prn ('<body>');
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HTP.prn ('<item id="P13_LOCATION_NAME">' || v_MINELOC || '</item>');
HTP.prn ('<item id="P13_COMMODITY">' || v_commodity || '</item>');
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HTP.prn ('</body>');
and also I have discovered that the automatically filling of the fields is only working sometimes (i don't know whether it depends on the company I select). Any ideas, why this is happening?
could somebody help me with the code please?
Thanks,
regards,
Denise

Hi,
@Chad: thanks for the code, I think it works (UPDATE: no, it does not work :-( )
now i am just left with the other problem that it works only sometimes
@user512746: yes, i guess you have understood correctly. I have changed the items P13_ACCTNO source used to "always replace" and taken out the default value, which I had set to &P13_ACCTNO.
But it still only works partly, I don't know why?
any other ideas?
Thanks so much for your help so far, both of you.
Regards,
Denise

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Hi all,
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An earlier thread in this forum discussed the same problem, guessing that the cookie handling was the problem. This thread recommended a particlar servlet , ShowCookie, for inspecting the cookies for the current session.
I have installed this cookie on the server, but don't see anything but one cookie, JSESSIONID.
At present I am running the jsp sample app on a Tomcat server, while Oracle 9iAS with sso and portal is running on another machine on the LAN.
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Cut from SSOEnablerJspBean.java:
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// Partner application session path scope
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// Host name of the database
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// Sehema name
private static String m_dbSchemaName = "testpartnerapp";
// Schema password
private static String m_dbSchemaPasswd = "testpartnerapp";
// Database SID name
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// Cancel URL(Home page for this application which don't require authentication)
private static String m_cancelUrl = "http://wmli007251:8080/testsso/fejl.html";
Values specified in the Oracle Portal partner app administration page:
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     Token: O87JOE971326
     Encryption key: 67854625C8B9BE96
     Logon-URL: http://wmsi001370:7777/pls/orasso/orasso.wwsso_app_admin.ls_login
     single signoff-URL: http://wmsi001370:7777/pls/orasso/orasso.wwsso_app_admin.ls_logout
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/Mads

Pierre - When you work on the sample application, you should test the pages in a separate browser instance. Don't use the Run Page links from the Builder. The sample app has a different authentication scheme from that used in the development environment so it'll work better for you to use a separate development browser from the application testing browser. In the testing browser, to request the page you just modified, login to the application, then change the page ID in the URL. Then put some navigation controls into the application so you can run your page more easily by clicking links from other pages.
Scott

How to change SSO Partner Application Login_url and Logout_url

As part of a deployment in a different data centre, we needed to change the domain name of an application using SSO for authentication. We have gone through the process of re-registering the SSO server but this does not update the domain name
By using diagnostic tools from Oracle we have discovered that the file 'osso.conf' in $ORACLE_HOME/Apache/Apache/conf/osso contains incorrect entries for login_url and logout_url.
These settings are of the form:
login_url=http://www.ourolddomain.com/pls/orasso/orasso.wwsso_app_admin.ls_login
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Hi,
[Solved] SSO fails to show success page you can find some information on re registering mod_osso.
Hope it helps.

HOW TO SET UP PARTNER APPLICATION TO USE SSO OUTSIDE OF PORTAL

If anyone knows how Portal switches context to run as the db user mapped to the lightweight schema and how it knows the db schema password please let me know.
Should you have any queries please do not hesitate to contact me on 07775 896738.
From document Oracle Portal Security Overview on PortalStudio.oracle.com:
In Single Sign On mode (EnableSSO=Yes in the DAD), mod_plsql determines the name of the light-weight user and mapped database schema by calling
WPG_SESSION_PRIVATE.GET_LW_USER and WPG_SESSION_PRIVATE.GET_DB_USER respectively.
** These calls are done using the Portal Schema (PORTAL30) and Portal schema password **
mod_plsql then executes the procedure in the requested URL by using the N-Tier Authentication feature to connect to the database as the user returned from
WPG_SESSION_PRIVATE.GET_DB_USER. ..... Note that N-Tier Authentication requires all schemas to be used for Portal user mappings to be granted 'connect
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SQL> desc WPG_SESSION_PRIVATE
PROCEDURE CREATE_SESSION
Argument Name Type In/Out Default?
P_COOKIE_NAME VARCHAR2 IN
FUNCTION GET_DB_USER RETURNS VARCHAR2
FUNCTION GET_LW_USER RETURNS VARCHAR2
PROCEDURE GET_SESSION_INFO
Argument Name Type In/Out Default?
NUM_PARAMS NUMBER OUT
PARAM_NAMES TABLE OF VARCHAR2(32000) OUT
PARAM_VALUES TABLE OF VARCHAR2(32000) OUT
PROCEDURE RESET_SESSION
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P_COOKIE_NAME VARCHAR2 IN
In my case only the Login Server (PORTAL30_SSO) is going to be used/installed
- the SAMPLE_SSO_PAPP application will only work if the DAD used to access is it set to use Basic authentication, i.e. the actual integration with the Login Server
is done in the sample application code calls, stored in the database
- when a DAD has enableSSO=yes it automatically accesses Portal (PORTAL30) packages to implement N-Tier authentication
I'm currently testing:
1. Configuring the SAMPLE_SSO_PAPP sample as documented with a DAD with Basic authentication
2. Amending the ssoapp procedure to set context to another (db) user on successful authentication:
wwctx_api.set_context (
p_user_name => 'SCOTT',
p_password => 'TIGER' );
3. If this works then set_context with get_lw_user instead
I have now amended the ssoapp procedure as follows to print out
1. The userid entered when the login box is presented
2. The Database user which the Portal Lightweight user is mapped to
3. The Lightweight user Portal has used for authentication
Amendments to papp.pkb:
(ssoapp procedure, declare db_user_info and lw_user_info as VARCHAR2 in declare section)
htp.p('Congratulations! It is working! ');
db_user_info := wwctx_api.get_db_user;
lw_user_info := wwctx_api.get_user;
htp.p('User Information:' || l_user_info || ' ');
htp.p('DB User Information:' || db_user_info || ' ');
htp.p('LW User Information:' || lw_user_info || ' ');
The following shows the interesting results from my testing:
- if the user owning the sample_sso_papp package is PORTAL30_SSO then the call to wwctx_api.get_db_user succeeds
- if the user owning the sample_sso_papp package is a non-portal schema e.g. SSOAPP below the call to wwctx_api.get_db_user generates a User Defined exception
Steps to test:
Created new schema SSOAPP on the database
- edited it in Portal and checked the use this schema for Portal users checkbox
- created new Lightweight user SSO_LW in Portal, mapped it to SSOAPP schema
- created new Lightweight user SSO_SCOTT in Portal, mapped to SCOTT schema
- loadjava -user ssoapp/ssoapp@portal30 SSOHash.class
- sqlplus portal30/portal30@portal30
@provsyns ssoapp
- sqlplus ssoapp/ssoapp@portal30
@loadsdk.sql
@loadpapp.sql
Created DAD with basic authentication SAMPLE_SSO_PAPP
- username: ssoapp
- default home page: sample_sso_papp.ssoapp
Registered the Sample SSO Partner Application with the Login Server and ran regapp.sql
Commented out the calls to get_db_user in papp.pkb to avoid exception
- called http://<server>/pls/sample_sso_papp
- logged on as SSO_LW/sso_lw
- got output:
Congratulations! It is working!
User Information: SSO_LW
LW User Information: PUBLIC
So the Portal lightweight user is not returned as SSO_LW
if anyone knows why the Lightweight User in my test is returned as PUBLIC not SSO_LW
Best Regards
MIchael

http://support.mozilla.com/en-US/kb/Changing+the+e-mail+program+used+by+Firefox

SSO for partner applications

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Thanks,
Swaroop

See Task 3 in the Section 9.4 of the Oracle Application Server Administrator's Guide:
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Hi Venkatesh,
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Please post ASP.NET questions in the ASP.NET forums (http://forums.asp.net ).

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If I click on the actual Discoverer icon, or the discoverer workbook shortuct, all works well.
If I click on the .bat file, or try to run the workbook via the cmd , it gives me the following error:
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Thanks!

Hello
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