Our Online Store have the new products: RFID antenna board. Currently it can work with JC10M24R and JCOP4 card chips.
Compared with normal cards, the antenna board module has a smaller size and fixed holes, which is easy to integrate in the IOT(Internet Of Things) project.

Memory access

JavaCard Applet Development Related Questions and Answers.
Ninapina
Posts: 3
Joined: Thu Jul 27, 2017 4:49 am
Points :62
Contact:

Memory access

Post by Ninapina » Tue Aug 01, 2017 7:35 am

Hello everyone,
I'm an absolute javacard-newbie, so please condone my eventually wrong javacard-comprehension. :)

I would like to add an method in my applet which enable to have access to memory(EEPROM?), what means that I could read or write data in a certain memory address, which I can indicicate manually via APDU-command. Would this idea be possible?
So far I only found these official Javacard-methods (https://www.win.tue.nl/pinpasjc/docs/ap ... ccess.html)

boolean writeData(byte[] src,
short src_off,
short src_blen,
byte[] auth_key,
short auth_key_off,
short auth_key_blen,
short other_sector,
short other_block)
throws ExternalException

short readData(byte[] dest,
short dest_off,
byte[] auth_key,
short auth_key_off,
short auth_key_blen,
short other_sector,
short other_block,
short other_len)
throws ExternalException

Are these methods helpful for my issue? And if they are, how could I use them correctly? Where do I get the keys for example and where I get the right external memory subsystem sector number from?

Ich would be very grateful, if you could give me some information, help or inspiration:)
best regards,
Nina

Tazmania09
Posts: 25
Joined: Mon Nov 30, 2015 3:40 am
Points :178
Contact:

Re: Memory access

Post by Tazmania09 » Wed Aug 02, 2017 4:44 am


Post Reply Previous topicNext topic

Who is online

Users browsing this forum: No registered users and 57 guests

JavaCard OS : Disclaimer