wireguard: netlink: use WG_KEY_LEN in policies

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When converting the netlink policies to YNL, the constants used
in the policy have to be visible to userspace.

As NOISE_*_KEY_LEN isn't visible to userspace, change the policy
to use WG_KEY_LEN, as also documented in the UAPI header:

$ grep WG_KEY_LEN include/uapi/linux/wireguard.h
 *    WGDEVICE_A_PRIVATE_KEY: NLA_EXACT_LEN, len WG_KEY_LEN
 *    WGDEVICE_A_PUBLIC_KEY: NLA_EXACT_LEN, len WG_KEY_LEN
 *            WGPEER_A_PUBLIC_KEY: NLA_EXACT_LEN, len WG_KEY_LEN
 *            WGPEER_A_PRESHARED_KEY: NLA_EXACT_LEN, len WG_KEY_LEN
 [...]

Add a couple of BUILD_BUG_ON() to ensure that they stay in sync.

No behavioural changes intended.

Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

...

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Asbjørn Sloth Tønnesen 2025-11-26 17:35:34 +00:00 • committed by Jason A. Donenfeld

parent aea199fa15

commit 9755f9de8f

1 changed files with 7 additions and 4 deletions

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11

drivers/net/wireguard/netlink.c

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