Can we write data on a java card's NVM without using java card applet? For example, write raw data into card NVM directly.
Is it possible to read card's NVM data without any authentication?
write and read data from NVM
-
marjkbadboy
- Posts: 33
- Joined: Fri Jul 31, 2015 2:47 am
- Points :217
- Contact:
Re: write and read data from NVM
RexLi wrote:Can we write data on a java card's NVM without using java card applet? For example, write raw data into card NVM directly.
If you write data into NVM, you can only store a very limited amount of data. This is the GlobalPlatform Issuer and Card identifiers. You should not use these for application data.
RexLi wrote:Is it possible to read card's NVM data without any authentication?
Just implement an applet that does not require authentication.
It's hunting season!
Re: write and read data from NVM
Can I make file on card's NVM ?
And if an applet is stored in NVM, which components the installer should insert to DF and when to insert to EF?
And if an applet is stored in NVM, which components the installer should insert to DF and when to insert to EF?
-
marjkbadboy
- Posts: 33
- Joined: Fri Jul 31, 2015 2:47 am
- Points :217
- Contact:
Re: write and read data from NVM
RexLi wrote:Can I make file on card's NVM ?
Yes, store the raw bytes in your applet.
RexLi wrote:And if an applet is stored in NVM, which components the installer should insert to DF and when to insert to EF?
A Java Card complies with the APDU messaging of ISO7816-4 and command can be implemented to support the part 4 commands but the card does not have to store the applet on a file system.
It's hunting season!
Who is online
Users browsing this forum: No registered users and 21 guests