diff options
| author | Willy Tarreau <w@1wt.eu> | 2022-05-02 10:46:08 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-18 10:26:53 +0200 |
| commit | 1a8ee547da2b64d6a2aedbd38a691578eff14718 (patch) | |
| tree | 17d15bec94b1d8717ccd24661d8060fdd0a06b0b /include/net/secure_seq.h | |
| parent | 99858114a3b2c8f5f8707d9bbd46c50f547c87c0 (diff) | |
secure_seq: use the 64 bits of the siphash for port offset calculation
[ Upstream commit b2d057560b8107c633b39aabe517ff9d93f285e3 ]
SipHash replaced MD5 in secure_ipv{4,6}_port_ephemeral() via commit
7cd23e5300c1 ("secure_seq: use SipHash in place of MD5"), but the output
remained truncated to 32-bit only. In order to exploit more bits from the
hash, let's make the functions return the full 64-bit of siphash_3u32().
We also make sure the port offset calculation in __inet_hash_connect()
remains done on 32-bit to avoid the need for div_u64_rem() and an extra
cost on 32-bit systems.
Cc: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Moshe Kol <moshe.kol@mail.huji.ac.il>
Cc: Yossi Gilad <yossi.gilad@mail.huji.ac.il>
Cc: Amit Klein <aksecurity@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/net/secure_seq.h')
| -rw-r--r-- | include/net/secure_seq.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/net/secure_seq.h b/include/net/secure_seq.h index d7d2495f83c27..dac91aa38c5af 100644 --- a/include/net/secure_seq.h +++ b/include/net/secure_seq.h @@ -4,8 +4,8 @@ #include <linux/types.h> -u32 secure_ipv4_port_ephemeral(__be32 saddr, __be32 daddr, __be16 dport); -u32 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr, +u64 secure_ipv4_port_ephemeral(__be32 saddr, __be32 daddr, __be16 dport); +u64 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr, __be16 dport); u32 secure_tcp_seq(__be32 saddr, __be32 daddr, __be16 sport, __be16 dport); |