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LEARN [--force]
Learn all useful information of the currently inserted card. When used without the force options, the command might do an INQUIRE like this:
INQUIRE KNOWNCARDP <hexstring_with_serialNumber> <timestamp>
The client should just send an END if the processing should go on
or a CANCEL to force the function to terminate with a cancel
error message. The response of this command is a list of status lines
formatted as this:
S KEYPAIRINFO hexstring_with_keygrip hexstring_with_id
If there is no certificate yet stored on the card a single "X" is returned in hexstring_with_keygrip.