Search

Anenl

I am going to encrypt and decrypt the data in my project. Could anybody provide algorithm sample code? Or where I can find sample code about algorithm, such as DES and RSA .

Anenl

Thank you for all the help. It's indeed a useful online tool for me.

https://javacardos.com/tools/atr.html

Anenl

I am trying to change my card ATR value to 3B 6D 00 00 00 73 C8 00 13 64 54 34 42 33 00 90 00
I have got the script already. But before doing that I would like to know how you know which part is ATR value and which part is historical bytes?

Anenl

I can store 8 bytes of data using store-data. But when I try to retrieve the data, I got the standard data, Is this the expected behavior of the java card? Hope anyone can give me some clues to help me out. cm> store-data 9F66081122334455667788 > 80 E2 80 00 0B 9F 66 08 11 22 33 44 55 66 77 88 < 90 ...

Anenl

We can use apdu.setIncomeandReceive to get the byte number we received, and compared with Lc to make sure if the APDU command is incorrect or correct.If I send Le in my APDU, it must be one byte of Data field. And I found there is not a ISO7816,OFFSET_LE, so how can the card get the Le? In java card...

Anenl

As shown in the following code, When I sent 0x00, it works, but with other, I got error status word. m> /send 00 => 00 <= 00 00 00 00 00 90 00 cm> /send 01 => 01 <= 68 81 cm> /send A0 => A0 <= 6D 00

Anenl

For the project requirement, I am developing an applet to anwser to some specific commands. But some of these commands are only 2 byte length, which don't match with APDU standard length - 4 byte. And the response I get from the applet is only 0x6881. So I wonder if there is a way to do handle short...

Anenl

As the subject said, please help to give me some example APDUs for writing data to java card.

Search found 8 matches

The same demo of encryption and decryption data

Re: Change ATR value

Change ATR value

command usage of GET-DATA and STORE-DATA

How to know Le in APDU command ?

Re: How to handle short commands

How to handle short commands

Help to give me some example APDU for me to write data to java card

Board Disclaimer