JavaCard OS

Posted: **Mon Dec 21, 2015 4:22 am**

I can send APDU command to select MF but I need to access EF. The following is the command I sent:

ResponseAPDU r = channel.transmit(new CommandAPDU(new byte[] { 0X00,(byte) 0XA4, 0X00, 0X00, 0X02, 0X3F, 0X00 }));

I got

Code: Select all

6F 1C 82 01 38 83 02 3F 00 85 02 03 7F 86 0C 7F 7F 7F 7F 41 60 60 7F 7F 7F 60 00 8A 01 05 90 00

My question is :
What next should I do in order to access EF?

Posted: **Mon Dec 21, 2015 10:44 pm**

Parse the response data:

Code: Select all

6F 1C
    82 01 38 (File descriptor byte: DF)
    83 02 3F 00 (File identifier)
    85 02 03 7F (Proprietary information not encoded in BER-TLV)
    86 0C 7F 7F 7F 7F 41 60 60 7F 7F 7F 60 00 (Security attribute in proprietary format)
    8A 01 05 (Life cycle status byte)
90 00

There's no information about EF/DF in the MF.
Or from Security attribute bytes, there are 12 EFs in this MF?

But you can try to select by path, maybe some useful data responsed.
You can try to select "3F 00 00 00" to "3F 00 FF FF". (3F002F00, 3F002F01 are reserved)

JavaCard OS

What should I do to access EF?

What should I do to access EF?

Re: What should I do to access EF?