Search found 225 matches: re:
Searched query: re
- Fri Oct 13, 2017 5:49 am
- Forum: Questions & Answers
- Topic: Doubt about JavaCard Memory
- Replies: 3
- Views: 7978
Re: Doubt about JavaCard Memory
The size of your test array is rather small, so considering all the overhead of executing other bytecodes, the difference is probably going to be difficult to notice.
- Sun Oct 08, 2017 9:18 pm
- Forum: Questions & Answers
- Topic: Question about APDU
- Replies: 1
- Views: 5390
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.
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.
- Wed Sep 27, 2017 12:16 am
- Forum: Algorithm School
- Topic: An issue with the verification of ECDSA
- Replies: 2
- Views: 22677
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?
- Tue Sep 26, 2017 11:55 pm
- Forum: Questions & Answers
- Topic: Sinus and Cosinus calculation in javacard?
- Replies: 5
- Views: 10515
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.
Define an array with size 360 bytes, direct look up the table to calculate sinus and cosinus.
- Mon Sep 18, 2017 4:09 am
- Forum: Questions & Answers
- Topic: Get info in paypass credit card
- Replies: 4
- Views: 9721
Re: Get info in paypass credit card
Try to use 00 B2 01 14 00 instead.
- Fri Sep 08, 2017 5:45 am
- Forum: Questions & Answers
- Topic: Export encrypted private key
- Replies: 2
- Views: 7015
Re: Export encrypted private key
It is probably a CryptoException where can retrieve the reason code.
- Thu Sep 07, 2017 1:30 am
- Forum: Questions & Answers
- Topic: [Pyapdu tool] Can't select applet
- Replies: 3
- Views: 9499
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
In my mind, there were some bugs in the old version of pyapdutool.
In my mind, there were some bugs in the old version of pyapdutool.
- Wed Sep 06, 2017 10:43 pm
- Forum: Questions & Answers
- Topic: [Pyapdu tool] Can't select applet
- Replies: 3
- Views: 9499
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.
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.
- Tue Sep 05, 2017 5:36 am
- Forum: Questions & Answers
- Topic: How to know Le in APDU command ?
- Replies: 1
- Views: 5851
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...
- Wed Aug 30, 2017 4:57 am
- Forum: Questions & Answers
- Topic: Contact and contactless applets on java card
- Replies: 1
- Views: 5297
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.