diff options
| author | Dmitry Safonov <dima@arista.com> | 2023-10-23 20:21:57 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-10-27 10:35:44 +0100 |
| commit | 7c2ffaf21bd67f73d21560995ce17eaf5fc1d37f (patch) | |
| tree | bc6301428bb2bb3954835a6a6c1e97d034f6acda /net/ipv6/tcp_ao.c | |
| parent | 0aadc73995d08f6b0dc061c14a564ffa46f5914e (diff) | |
net/tcp: Calculate TCP-AO traffic keys
Add traffic key calculation the way it's described in RFC5926.
Wire it up to tcp_finish_connect() and cache the new keys straight away
on already established TCP connections.
Co-developed-by: Francesco Ruggeri <fruggeri@arista.com>
Signed-off-by: Francesco Ruggeri <fruggeri@arista.com>
Co-developed-by: Salam Noureddine <noureddine@arista.com>
Signed-off-by: Salam Noureddine <noureddine@arista.com>
Signed-off-by: Dmitry Safonov <dima@arista.com>
Acked-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/tcp_ao.c')
| -rw-r--r-- | net/ipv6/tcp_ao.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/net/ipv6/tcp_ao.c b/net/ipv6/tcp_ao.c index 0640acaee67b..9ab594fadbd9 100644 --- a/net/ipv6/tcp_ao.c +++ b/net/ipv6/tcp_ao.c @@ -12,6 +12,56 @@ #include <net/tcp.h> #include <net/ipv6.h> +static int tcp_v6_ao_calc_key(struct tcp_ao_key *mkt, u8 *key, + const struct in6_addr *saddr, + const struct in6_addr *daddr, + __be16 sport, __be16 dport, + __be32 sisn, __be32 disn) +{ + struct kdf_input_block { + u8 counter; + u8 label[6]; + struct tcp6_ao_context ctx; + __be16 outlen; + } __packed * tmp; + struct tcp_sigpool hp; + int err; + + err = tcp_sigpool_start(mkt->tcp_sigpool_id, &hp); + if (err) + return err; + + tmp = hp.scratch; + tmp->counter = 1; + memcpy(tmp->label, "TCP-AO", 6); + tmp->ctx.saddr = *saddr; + tmp->ctx.daddr = *daddr; + tmp->ctx.sport = sport; + tmp->ctx.dport = dport; + tmp->ctx.sisn = sisn; + tmp->ctx.disn = disn; + tmp->outlen = htons(tcp_ao_digest_size(mkt) * 8); /* in bits */ + + err = tcp_ao_calc_traffic_key(mkt, key, tmp, sizeof(*tmp), &hp); + tcp_sigpool_end(&hp); + + return err; +} + +int tcp_v6_ao_calc_key_sk(struct tcp_ao_key *mkt, u8 *key, + const struct sock *sk, __be32 sisn, + __be32 disn, bool send) +{ + if (send) + return tcp_v6_ao_calc_key(mkt, key, &sk->sk_v6_rcv_saddr, + &sk->sk_v6_daddr, htons(sk->sk_num), + sk->sk_dport, sisn, disn); + else + return tcp_v6_ao_calc_key(mkt, key, &sk->sk_v6_daddr, + &sk->sk_v6_rcv_saddr, sk->sk_dport, + htons(sk->sk_num), disn, sisn); +} + static struct tcp_ao_key *tcp_v6_ao_do_lookup(const struct sock *sk, const struct in6_addr *addr, int sndid, int rcvid) |