Smartcardio and reading a cert from a CAC

hey guys, i've managed to communicate successfully to the card reader, but i'm at a bit of a loss in how to read a certificate on the CAC itself. i just need to see the x509 cert and associated chain.
any help much appreciated, thanks!!!

Thanks Adriaan, to answer your questions:
1) CAC is Common Access Card, it has a chip as would be found in some credit cards (like AMEX Blue). It holds a public and private keep of a user. I have been able to get the user certificate in a web application, but I did not have to go directly to the smart card reader for this.
2) Right now I am developing on a Windows platform, but production is Linux and source code is open source. I have been leveraging javax.smartcardio
3) Not sure about this one, I know that for my code to work, the CardTerminal .connect had to be "T=0", hope that helps.
4) Not sure about the protocols really, but for DoD, each workstation has a card reader, and in order for you to log into the machine, you must have a valid CAC.
Here's is the output of my test code so far:
Card_Info: PC/SC card in SCM Microsystems Inc. SCRx31 USB Reader 0, protocol T=0, state OK
Card Protocol: T=0
ATR: [B@5afd29
ATR historical bytes: [B@1a2961b
response0: 6e 00

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1) CAC is Common Access Card, it has a chip as would be found in some credit cards (like AMEX Blue). It holds a public and private keep of a user. I have been able to get the user certificate in a web application, but I did not have to go directly to the smart card reader for this.
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dr8086 wrote:
This method sounds like an excellent suggestion, but I do have a few questions where I dont think I've understood fully.
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public:
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dr8086 wrote:
My main concern is that the object may go out of memory or be deallocated, since it wouldnt be held in any namespace or anything.
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I also have a more general programming question about the purpose of the buffer. Would the buffer basically be a big table of position values, which are stored until they can be read into the rest of the VI?
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Writing the file using Write to SGL and reading the data using Read from SGL

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(see also http://forums.ni.com/ni/board/message?board.id=BreakPoint&message.id=925 )
Message Edited by altenbach on 07-29-2005 11:35 PM
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Smartcardio and reading a cert from a CAC

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