APDU command set

[nidhintomy]

In AN12413 SE050 APDU Specification

"4.1.1.1 CLA byte
The CLA byte is fixed for each command to 0x80 (= no secure messaging) or 0x84 (=
proprietary secure messaging). Any other CLA byte will be rejected."

But in the same document CLA byte is set to 0x00 for appletSelect c-apdu.

Table 51. AppletSelect C-APDU
CLA 0x00
INS 0xA4
P1 0x04
P2 0x00
Lc 0x10
Payload 0xA0000003965453000000010300000000
Le 0x00

Then how this CLA byte will be accepted?

Thanks!

[danielchen · Accepted solution]

Hi  Nidhintomy:

The applet selection is a card manager command and it interacts with the JCOP, NOT the applet.  hense CLA  is 00.

Regards

Daniel