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How to handle short commands

JavaCard Applet Development Related Questions and Answers.
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Anenl
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How to handle short commands

Post by Anenl » Wed Aug 09, 2017 2:13 am

For the project requirement, I am developing an applet to anwser to some specific commands.

But some of these commands are only 2 byte length, which don't match with APDU standard length - 4 byte.
And the response I get from the applet is only 0x6881. So I wonder if there is a way to do handle short commands.

Thanks.
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Pf6KINE
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Re: How to handle short commands

Post by Pf6KINE » Wed Aug 09, 2017 10:35 pm

Describe your question clearer, then we can give you specific help.
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Anenl
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Re: How to handle short commands

Post by Anenl » Wed Aug 09, 2017 11:09 pm

As shown in the following code, When I sent 0x00, it works, but with other, I got error status word.

Code: Select all

m>  /send 00
 => 00 
 <= 00 00 00 00 00 90 00

cm>  /send 01
 => 01
 <= 68 81                            

cm>  /send A0
 => A0
 <= 6D 00                                   

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