Search found 36 matches

by popmun09
Sun Aug 13, 2017 10:51 pm
Forum: Reader
Topic: how i can chang atr
Replies: 1
Views: 749

Re: how i can chang atr

Which card type do you use?

AFAIK, there is no software to change ATR.

You can ask your card provider for the method to change ATR.
by popmun09
Mon Jul 10, 2017 5:48 am
Forum: Questions & Answers
Topic: Directory Tree of Java Card Filesystem
Replies: 4
Views: 1007

Re: Directory Tree of Java Card Filesystem

You may need to know these functions (i.e. DIRECTORY, LIST_OBJECTS), which are OS-depended. ISO 7816 does not describe them.
It means that you should read Card OS specification to make done this task.
by popmun09
Thu May 18, 2017 3:12 am
Forum: Questions & Answers
Topic: How to confirm the integrity of transient array
Replies: 1
Views: 552

Re: How to confirm the integrity of transient array

Calculate MAC or CRC and then verify on the terminal side.
by popmun09
Thu May 18, 2017 2:58 am
Forum: Questions & Answers
Topic: CLA= 0x7E in APDU command
Replies: 6
Views: 1236

Re: CLA= 0x7E in APDU command

0x7E isn't a valid CLA. The CLA value 0x7E is reserved for inter-industry use. CLA=7E contains relevant bits 0111xxxxb, where x can be 0 or 1. It indicate that both secure messaging and command chaining will be used. Maybe javax.smartcardio detects this CLA value and automatically starts a secure me...
by popmun09
Wed May 17, 2017 5:55 am
Forum: Questions & Answers
Topic: CLA= 0x7E in APDU command
Replies: 6
Views: 1236

Re: CLA= 0x7E in APDU command

Why must your customer use 0x7E as CLA byte? You may try to communicate with them and use CLA=0x80 or 0x00.
by popmun09
Wed May 17, 2017 4:50 am
Forum: Questions & Answers
Topic: CLA= 0x7E in APDU command
Replies: 6
Views: 1236

Re: CLA= 0x7E in APDU command

I'm curious. How do you know the CLA bytes that card receive is 0x3C?
by popmun09
Wed May 17, 2017 4:46 am
Forum: Questions & Answers
Topic: How to reset card during APDUs execution
Replies: 3
Views: 649

Re: How to reset card during APDUs execution

If you are using javax.smartcardio, you can try to pass the appropriate boolean value to disconnect and reset the card.
by popmun09
Tue Mar 14, 2017 5:14 am
Forum: Algorithm School
Topic: Do hash on PC and send digest to my card for signing
Replies: 8
Views: 1613

Re: Do hash on PC and send digest to my card for signing

Try to use cipher instead of hash.
by popmun09
Tue Oct 25, 2016 4:23 am
Forum: Questions & Answers
Topic: can't install Applet successfully
Replies: 3
Views: 990

Re: can't install Applet successfully

JCIDE doesn't support HMAC. You can use SHA1 instead.
by popmun09
Mon Oct 10, 2016 4:53 am
Forum: Questions & Answers
Topic: create SSD
Replies: 1
Views: 898

Re: create SSD

I think the answer of your question should already been recorded in your card document.

You can check your card documentation carefully. You card supplier has detailed documentation for their customers.
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