[Muscle] Secure PIN entry with variable legth

[Mathias Tausig]

> AFAIK it is not possible to NOT padd a PIN using the PIN entry command
> of a class2 reader. The CCID specification does not specify a no
> padding option.
>
> My CCID driver has support of this feature with the SPR532 reader
> using a proprietary command of the reader. The patch [1] was applied
> two years ago and its use is not really documented (even in the source
> code). If I am correct you just need to send an Class 1 APDU (CLA,
> INS, P1, P2) and the reader will insert the PIN without padding.
>
> If you are not using the SPR532 reader I have no solution.
>

Sadly, no. It's an Omnikey Cardman 3621.
Thank you anyway, the knowledge that I can stop trying, helps a bit, too...

cheers
Mathias