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Search found 234 matches

by mabel
Sun Oct 08, 2017 9:18 pm
Forum: Questions & Answers
Topic: Question about APDU
Replies: 1
Views: 348

Re: Question about APDU

A1: Method sendBytes() causes the card to send a number of bytes to terminal from current APDU buffer.
A2: Method getBuffer() returns a reference to a byte array buffer contained command data sent from terminal to the card.

If you use JCIDE to run your applet, you may communicate with the simulator.
by mabel
Wed Sep 27, 2017 12:16 am
Forum: Algorithm School
Topic: An issue with the verification of ECDSA
Replies: 2
Views: 823

Re: An issue with the verification of ECDSA

If convenient, would you show us your whole project in order to let us confirm where is the problem?
by mabel
Tue Sep 26, 2017 11:55 pm
Forum: Questions & Answers
Topic: Sinus and Cosinus calculation in javacard?
Replies: 5
Views: 681

Re: Sinus and Cosinus calculation in javacard?

Just try to use Look-up table method.

Define an array with size 360 bytes, direct look up the table to calculate sinus and cosinus.
by mabel
Mon Sep 18, 2017 4:09 am
Forum: Questions & Answers
Topic: Get info in paypass credit card
Replies: 4
Views: 556

Re: Get info in paypass credit card

Try to use 00 B2 01 14 00 instead.
by mabel
Fri Sep 08, 2017 5:45 am
Forum: Questions & Answers
Topic: Export encrypted private key
Replies: 2
Views: 470

Re: Export encrypted private key

It is probably a CryptoException where can retrieve the reason code.
by mabel
Thu Sep 07, 2017 1:30 am
Forum: Questions & Answers
Topic: [Pyapdu tool] Can't select applet
Replies: 3
Views: 723

Re: [Pyapdu tool] Can't select applet

It seems that your pyapdutool is not the latest version. You may need to re-download this tool. My pyapdutool(also downloaded from here) is v1.1

pyapdutool-v1.1.png


In my mind, there were some bugs in the old version of pyapdutool.
by mabel
Wed Sep 06, 2017 10:43 pm
Forum: Questions & Answers
Topic: [Pyapdu tool] Can't select applet
Replies: 3
Views: 723

Re: [Pyapdu tool] Can't select applet

1. Would you tell us your card model?

2. Is your pyApdutool version the latest one?

BTW, I have tested your code with pyapdutool on my computer. It can work without any problem.
by mabel
Tue Sep 05, 2017 5:36 am
Forum: Questions & Answers
Topic: How to know Le in APDU command ?
Replies: 1
Views: 332

Re: How to know Le in APDU command ?

It is managed by the CAD. In case of T=1, you can get the Le value directly. even there you can't be sure, because it also could be Lc. But in case of T=0 it is different, as the CAD sends only the header at the beginning. Then you need to evaluate Lc and optionally get the data with setIncomingAndR...
by mabel
Wed Aug 30, 2017 4:57 am
Forum: Questions & Answers
Topic: Contact and contactless applets on java card
Replies: 1
Views: 344

Re: Contact and contactless applets on java card

Usually, writing a javacard applet is very similar no matter what's the protocol is used, however it also depends on your specific or special requirement.
by mabel
Wed Aug 30, 2017 4:53 am
Forum: Questions & Answers
Topic: AT command that used to send APDU
Replies: 2
Views: 471

Re: AT command that used to send APDU

The command may be AT+CSIM, I m not sure. you can check GSM doc for details.
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