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change package-AID but download and install successfully

JavaCard Applet Development Related Questions and Answers.
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Posts: 20
Joined: Fri Aug 14, 2015 4:56 am
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change package-AID but download and install successfully

Post by conliaOdk » Tue Aug 18, 2015 2:46 am

I used JCIDE to debug my applet with the package's AID=0102030405 and applet'AID=010203040501. And converted my applet to .cap file.

Then I change my package's AID via WinHex, as follows:
original AID:

changed AID:

After that I used pyApdutool to download and install the .cap file.In my opinion,it wouldn't succeed at all. Unexpectedly, 90 00. What a strange issue!


I have changed the package's AID,that is the first 5 bytes of package'AID and applet'AID are not equal. Why succeed?

Can anyone clarify my doubts? any help is appreciated!

Addtionally, I also tried to change the package- AID' length- 91 82 73 64 55 32,it download successfully either!
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horse dream
Posts: 76
Joined: Thu May 21, 2015 11:48 pm
Points :136

Re: change package-AID but download and install successfully

Post by horse dream » Tue Aug 18, 2015 3:44 am

A very interesting issue. Maybe it results from card implementation. I'm not sure.

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