jsauer/torvalds-linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-01-12 01:20:14 +00:00
Code

net: nfc: nci: Increase NCI_DATA_TIMEOUT to 3000 ms

Browse Source 
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: Juraj Šarinay <juraj@sarinay.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20250902113630.62393-1-juraj@sarinay.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Juraj Šarinay 2025-09-02 13:36:28 +02:00 committed by Jakub Kicinski
parent 648d628db5
commit 21f82062d0
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/net/nfc/nci_core.h
View File

@ -52,7 +52,7 @@ enum nci_state {
#define NCI_RF_DISC_SELECT_TIMEOUT 5000
#define NCI_RF_DEACTIVATE_TIMEOUT 30000
#define NCI_CMD_TIMEOUT 5000
#define NCI_DATA_TIMEOUT 700
#define NCI_DATA_TIMEOUT 3000
struct nci_dev;