MyEID starting version 4.5 supports 4K RSA keys. The card also
now supports proper APDU chainging (for sending large APDUs) and
receiving large responses via GET_RESPONSE splitting.
This updates the following:
* detection code properly announces 3K and 4K RSA support
when available
* APDU chaining is used when possible
* use ISO GET_RESPONSE handling for large responses
* max_recv_size is set to 256 which it always was supposed to be
as the old cards respond with that large responses too
* use the 2K signing kludge only on cards that need it
* unwrap and decipher code paths unified to the extent possible
Signed-off-by: Timo Teräs <timo.teras@iki.fi>
3f832ca6da