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About Get Data Command

JavaCard Applet Development Related Questions and Answers.
Heerden
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About Get Data Command

Postby Heerden » Mon Feb 26, 2018 11:56 pm

According to GP 2.1.1 Specification

GetData-GP.png


But when I test in JC30M48CR with Get Data command, only Tag 66, C1 and E0 are supported. Tag 42 and 45 are not supported.
Why is it?
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javacardx
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Re: About Get Data Command

Postby javacardx » Tue Feb 27, 2018 11:35 pm

I copied some paragraph from GP211 and emphasized some words.
I think that maybe you are right.But I am still puzzled about "It does not mandate".Is there anybody to explain it?
The following meanings apply to SHALL, SHOULD, and MAY in this document:
• SHALL indicates that the statement containing the SHALL must be implemented as defined in this
Specification. It does not mandate the implementation of the statement.
• SHOULD indicates a recommendation. It is strongly recommended to implement the statement as
defined in this Specification.
• MAY indicates an option

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JavaCardOS
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Re: About Get Data Command

Postby JavaCardOS » Thu Mar 01, 2018 2:49 am

For Tag 42 and 45, the JC30M48CR card are supported. But you must set the tag value with STORE DATA command first.

Heerden
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Re: About Get Data Command

Postby Heerden » Wed Mar 07, 2018 5:00 am

Okay, I will try it.


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