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loongarch-next
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3 Commits

Author SHA1 Message Date
Antonio Quartulli
89d3c0e461 ovpn: kill key and notify userspace in case of IV exhaustion 
IV wrap-around is cryptographically dangerous for a number of ciphers,
therefore kill the key and inform userspace (via netlink) should the
IV space go exhausted.

Userspace has two ways of deciding when the key has to be renewed before
exhausting the IV space:
1) time based approach:
   after X seconds/minutes userspace generates a new key and sends it
   to the kernel. This is based on guestimate and normally default
   timer value works well.

2) packet count based approach:
   after X packets/bytes userspace generates a new key and sends it to
   the kernel. Userspace keeps track of the amount of traffic by
   periodically polling GET_PEER and fetching the VPN/LINK stats.

Signed-off-by: Antonio Quartulli <antonio@openvpn.net>
Link: https://patch.msgid.link/20250415-b4-ovpn-v26-20-577f6097b964@openvpn.net
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
 2025-04-17 12:30:03 +02:00
Antonio Quartulli
203e2bf559 ovpn: implement key add/get/del/swap via netlink 
This change introduces the netlink commands needed to add, get, delete
and swap keys for a specific peer.

Userspace is expected to use these commands to create, inspect (non
sensitive data only), destroy and rotate session keys for a specific
peer.

Signed-off-by: Antonio Quartulli <antonio@openvpn.net>
Link: https://patch.msgid.link/20250415-b4-ovpn-v26-19-577f6097b964@openvpn.net
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
 2025-04-17 12:30:03 +02:00
Antonio Quartulli
8534731dbf ovpn: implement packet processing 
This change implements encryption/decryption and
encapsulation/decapsulation of OpenVPN packets.

Support for generic crypto state is added along with
a wrapper for the AEAD crypto kernel API.

Signed-off-by: Antonio Quartulli <antonio@openvpn.net>
Link: https://patch.msgid.link/20250415-b4-ovpn-v26-9-577f6097b964@openvpn.net
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
 2025-04-17 12:30:02 +02:00