Websphere EJB/JAAS interoperability failure

Greetings all,
I am attempting to deploy 2 applications on my Websphere server.
The first contains a Servlet in a Web Module that performs JAAS authentication using Websphere's WSLogin class. The second contains an EJB in an EJB Module, which invokes the getCallerPrincipal method and performs some application based logic based on the result. The servlet code contacts the EJB after its JAAS authentication phase, and invokes the method in which getCallerPrincipal is called.
My current status is: JAAS authentication is succeeding. I receive a valid Subject in which there is a valid Principal that corresponds to the username and password input WSLogin expects. EJB contact also succeeds, and my method is invoked. However, getCallerPrincipal, which I expect to return me the Principal successfully authenticated via JAAS, always and only returns Websphere's default 'UNAUTHENTICATED' principal.
There is nothing helpful in the log files. I have spent a great deal of time in configuration, but I'm sure I could have made some mistake along the way.
Does anyone have any clue about the above error?
Has anyone successfully deployed a Websphere solution involving EJB-JAAS interoperability? If so, what were the critical elements to your solution/deployment?
Thanks very much in advance,
Peter

hi peter,
can u post a sample servlet-jaas example alongwith the policy files which you can deploy on websphere 5 version?
it would be great to know how you did it...
my email is [email protected]
thanks,
satyan

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There are three Session Classes that describe this interface.
The base session is SessionA. Extending that (i.e. :: in IDL) is SessionB and extending that is SessionC.
The client is broken up into two parts which run in the same JVM. The first part has a dependency to SessionC and the second part has a dependency SessionB. It has to be this way.
Upon start up the client creates a SessionC everything okay. The client then launches part of the application which only has a dependency to SessionB. To launch this part of the client application a SessionB object must be past. To do this I use the SessionBHelper class and the narrow method.
Everything works fine no exceptions are thrown.
Now here is the part that is killing me - when I invoke a method then from the Client to SessionB it throws a Marshalling exception
org.omg.CORBA.MARSHAL: minor code: 0 completed: No. I check the spec. and there is minor code 0 has a default meaning - i.e. nothing. I have n't a clue what is wrong.
My only thoughts are that narrow can only be used in down casting. But I could be wrong here.
I would really appreciate any help or thoughts. Thanks in Advance.

When ever I come across the most lovely Marshalling exceptions... its usually because my skel/stub classes out of synch with each other (on the client/server)
When I update the everyone... I usually have everything working and playing nicely.
This occurs with some frequency using Websphere EJB (using IIOP)... if your client JAR's are not in synch with your server JAR's... then the objects can't be marshalled... its a pain
./dave

Transfer-Encoding: chunked

Hi
I'm creating an http client.. but got problems with the chunked data encoding.. does anybody know a link where there is more info about it? how much should I read from each chunk and where is it written? did anybody face such a problem before? My client tells the server it's firefox:
GET / HTTP/1.1
Host: mail.yahoo.com
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.7.10) Gecko/20050716 Firefox/1.0.6
Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
and the server sends this:
HTTP/1.1 200 OK
Date: Sun, 25 Sep 2005 13:45:31 GMT
P3P: policyref="http://p3p.yahoo.com/w3c/p3p.xml", CP="CAO DSP COR CUR ADM DEV TAI PSA PSD IVAi IVDi CONi TELo OTPi OUR DELi SAMi OTRi UNRi PUBi IND PHY ONL UNI PUR FIN COM NAV INT DEM CNT STA POL HEA PRE GOV"
Cache-Control: private
Connection: close
Transfer-Encoding: chunked
Content-Type: text/html
Content-Encoding: gzip
Set-Cookie: B=9dikf6d1jdafr&b=3&s=5m; expires=Tue, 02-Jun-2037 20:00:00 GMT; path=/; domain=.yahoo.com
1562
please help!
hmm.. looks like nobody is gonna answer.. :(

3.6.1 Chunked Transfer Coding
The chunked encoding modifies the body of a message in order to
transfer it as a series of chunks, each with its own size indicator,
followed by an OPTIONAL trailer containing entity-header fields. This
allows dynamically produced content to be transferred along with the
information necessary for the recipient to verify that it has
received the full message.
Chunked-Body = *chunk
last-chunk
trailer
CRLF
chunk = chunk-size [ chunk-extension ] CRLF
chunk-data CRLF
chunk-size = 1*HEX
last-chunk = 1*("0") [ chunk-extension ] CRLF
chunk-extension= *( ";" chunk-ext-name [ "=" chunk-ext-val ] )
chunk-ext-name = token
chunk-ext-val = token | quoted-string
chunk-data = chunk-size(OCTET)
trailer = *(entity-header CRLF)
The chunk-size field is a string of hex digits indicating the size of
the chunk. The chunked encoding is ended by any chunk whose size is
zero, followed by the trailer, which is terminated by an empty line.
The trailer allows the sender to include additional HTTP header
fields at the end of the message. The Trailer header field can be
used to indicate which header fields are included in a trailer (see
section 14.40).
A server using chunked transfer-coding in a response MUST NOT use the
trailer for any header fields unless at least one of the following is
true:
a)the request included a TE header field that indicates "trailers" is
acceptable in the transfer-coding of the response, as described in
section 14.39; or,
b)the server is the origin server for the response, the trailer
fields consist entirely of optional metadata, and the recipient
could use the message (in a manner acceptable to the origin server)
without receiving this metadata. In other words, the origin server
is willing to accept the possibility that the trailer fields might
be silently discarded along the path to the client.
This requirement prevents an interoperability failure when the
message is being received by an HTTP/1.1 (or later) proxy and
forwarded to an HTTP/1.0 recipient. It avoids a situation where
compliance with the protocol would have necessitated a possibly
infinite buffer on the proxy.
An example process for decoding a Chunked-Body is presented in
appendix 19.4.6.
All HTTP/1.1 applications MUST be able to receive and decode the
"chunked" transfer-coding, and MUST ignore chunk-extension extensions
they do not understand.

Websphere EJB/JAAS interoperability failure

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