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| Are Message Channel Exit programs suitable? |
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| TKiranKumar |
 Posted: Fri May 14, 2004 5:28 am Post subject: Are Message Channel Exit programs suitable? |
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Novice
Joined: 14 May 2004
Posts: 15
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Hi ,
I need to provide security of message flowing between 2 applications communicating via MQ.
The Second application is Third party software.
If I encrypt a message and put it on the remote queue, I need the corresponding decryption to happen ONLY when the Third Party application picks up the message from its local queue. The local queue must till then contain encrypted messages.
Are exit programs suitable for such a solution, in particular Message channel exits?
if not , Is there any MQ based solution.
Regards,
Kiran |
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| mqonnet |
| Posted: Fri May 14, 2004 6:14 am Post subject: |
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Grand Master
Joined: 18 Feb 2002
Posts: 1114
Location: Boston, Ma, Usa.
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Take a look at the manuals giving all the details that you are looking for. Security, Intercommunication and programming ref/guide will together give you all the info.
Whenever you want to encrypt/decrypt, it is always a two way process, as the name itself suggests. Which would mean, your side doing the encryption and the other side doing the decryption. Now in your case, if the encrypted message is not decrypted and stored "as is" on the local queue by the MCA, then it would become the responsibility of the 3rd party app to decrypt it. Does the 3rd party app do that??? Do you know what structures they use and their decrypting algo for you to be able to encrypt at your end. If the answer for this is NO, then i am afraid there is no way you can design this.
The only way is to use send-receive exits, which would provide you with the encryption and decryption on the channel. And the message is decrypted by the receive exit on the receiving mca before it puts the message onto the queue.
You may try api exits, but again, there's whole lot of complexity in your particular case when using a 3rd party tool at the other end.
Cheers
Kumar
_________________
IBM Certified WebSphere MQ V5.3 Developer
IBM Certified WebSphere MQ V5.3 Solution Designer
IBM Certified WebSphere MQ V5.3 System Administrator |
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| TKiranKumar |
| Posted: Fri May 14, 2004 6:58 am Post subject: |
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Novice
Joined: 14 May 2004
Posts: 15
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Thanks a lot for that really fast reply.
It gave me the exact information I was looking forward for.
Thanks again.
Regards,
Kiran |
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| jefflowrey |
| Posted: Fri May 14, 2004 7:08 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Kumar & Kiran -
Send/Receive and Message exits only apply for messages moving across channels, and do not encrypt messages sitting on queues.
In order to have messages that are encrypted on the queue, but decrypted to the appropriate application (and not *by* the appropriate application), you will have to use an API exit.
_________________
I am *not* the model of the modern major general. |
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| mqonnet |
| Posted: Fri May 14, 2004 7:15 am Post subject: |
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Grand Master
Joined: 18 Feb 2002
Posts: 1114
Location: Boston, Ma, Usa.
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Thanks Jeff.
Looks like you summed up in 2 lines what i said in 10. :)
Cheers
Kumar
_________________
IBM Certified WebSphere MQ V5.3 Developer
IBM Certified WebSphere MQ V5.3 Solution Designer
IBM Certified WebSphere MQ V5.3 System Administrator |
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| TKiranKumar |
| Posted: Sun May 16, 2004 2:24 am Post subject: Thanks |
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Novice
Joined: 14 May 2004
Posts: 15
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Hi Jeff and Kumar,
Thanks a lot. You guys have shown me the direction I require.
Thanks and Regards,
Kiran |
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| TKiranKumar |
| Posted: Sun May 16, 2004 3:05 am Post subject: Take a look at another post of mine |
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Novice
Joined: 14 May 2004
Posts: 15
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Hi Jeff,
Please take a look at another post of mine. The description of the issue "Looks huge" but it is a small configuration issue ...I feel.
Your inputs are definelty , along with Mr Kumar's, very handy.
Regards,
Kiran |
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