Commit 21f82062 authored by Juraj Šarinay's avatar Juraj Šarinay Committed by Jakub Kicinski
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net: nfc: nci: Increase NCI_DATA_TIMEOUT to 3000 ms



An exchange with a NFC target must complete within NCI_DATA_TIMEOUT.
A delay of 700 ms is not sufficient for cryptographic operations on smart
cards. CardOS 6.0 may need up to 1.3 seconds to perform 256-bit ECDH
or 3072-bit RSA. To prevent brute-force attacks, passports and similar
documents introduce even longer delays into access control protocols
(BAC/PACE).

The timeout should be higher, but not too much. The expiration allows
us to detect that a NFC target has disappeared.

Signed-off-by: default avatarJuraj Šarinay <juraj@sarinay.com>
Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20250902113630.62393-1-juraj@sarinay.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 648d628d
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