From patchwork Wed Jun 14 23:09:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Safonov X-Patchwork-Id: 13280553 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E27CF18C24 for ; Wed, 14 Jun 2023 23:10:36 +0000 (UTC) Received: from mail-wm1-x336.google.com (mail-wm1-x336.google.com [IPv6:2a00:1450:4864:20::336]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3E68F2950 for ; Wed, 14 Jun 2023 16:10:16 -0700 (PDT) Received: by mail-wm1-x336.google.com with SMTP id 5b1f17b1804b1-3f8d86db375so13316885e9.1 for ; Wed, 14 Jun 2023 16:10:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=arista.com; s=google; t=1686784214; x=1689376214; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=XvwaqEZXXpnJlnhXKHYEwW4OLTgiCZ0yae1hM5t3UEk=; b=JSukiI0jiUk3dBvJoriSoWAQ1j06rKqSV8vMr4E1gyy6gPKfILniSX+r90qPbA+bfy oPb5hX3U8Tu/xPZRm4OdV3gCnANPKH/v68GsftXPnqGGMnJZkJm/kbjsIRmH8+9pJcTf p97BNI03gXYMNxjvR/w3EFKA7Azbjrlb/ZgEYP/7xkulqV9wyXlFMMZIki0/RolPN8gE 0aFNGKp3htOJGbC+aHmbO+gZFjWbSV+MuAFFZAK2AUrKAdJwWEq/wsXZ29he0s4SAJsF WqZsrVd4rsyeKCTjqB3fq5V7mjldP8Id2XElqBGXBWIH8NNyzZyGUGVa4kUjnTyJg8pP pyyA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686784214; x=1689376214; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=XvwaqEZXXpnJlnhXKHYEwW4OLTgiCZ0yae1hM5t3UEk=; b=BjsmyXs1ZBiZCCGFEYL6IcAeisA79ONGqEFae3/DclpetsnW4KVBsnFaFejKfHfWHN 0G6SbT6SOhkFCFIYlvPE8mYxpoU2gN/rUmD2UWfwM6v1gotfrMgSEpsJVL1n1ik6vPxU YdhqQR2GfzlRjxVh/b5GpvJboPkjmB7wJil2aoCue0LfrvRB6PjyMr14EjhLnxtc2sTQ wphRSft7gIy82qyUKiyUq7Qh3OWrLt8lXJ3GO7VuTVIfEGSEIAN+XYBAdbtcCR3lvoPp XAecxdtejQQ13jHWmXXNaz7lMEKzsskRX/Tqr3Yy5WlvB92OThBYuva0bSg+ygx4s8Jf BLWA== X-Gm-Message-State: AC+VfDzaREbjZ+EAfWY9QvLTw81Hd/EmBqCWzEirO9GJi8yn+LwiWd/8 /bjKsMALHI2PsFib+s0A6CvP8w== X-Google-Smtp-Source: ACHHUZ75ugEMjcKn187QftNV4tE49GJAHbfh6p/WdDB+2DXF6Nd66gXqydXqvOHNF5g+tKRtjbi1XA== X-Received: by 2002:a05:600c:290:b0:3f7:f7d5:a07f with SMTP id 16-20020a05600c029000b003f7f7d5a07fmr13201564wmk.17.1686784214412; Wed, 14 Jun 2023 16:10:14 -0700 (PDT) Received: from Mindolluin.ire.aristanetworks.com ([217.173.96.166]) by smtp.gmail.com with ESMTPSA id s12-20020a7bc38c000000b003f7ba52eeccsm18725261wmj.7.2023.06.14.16.10.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Jun 2023 16:10:14 -0700 (PDT) From: Dmitry Safonov To: David Ahern , Eric Dumazet , Paolo Abeni , Jakub Kicinski , "David S. Miller" Cc: linux-kernel@vger.kernel.org, Dmitry Safonov , Andy Lutomirski , Ard Biesheuvel , Bob Gilligan , Dan Carpenter , David Laight , Dmitry Safonov <0x7f454c46@gmail.com>, Donald Cassidy , Eric Biggers , "Eric W. Biederman" , Francesco Ruggeri , Herbert Xu , Hideaki YOSHIFUJI , Ivan Delalande , Leonard Crestez , Salam Noureddine , netdev@vger.kernel.org Subject: [PATCH v7 12/22] net/tcp: Verify inbound TCP-AO signed segments Date: Thu, 15 Jun 2023 00:09:37 +0100 Message-Id: <20230614230947.3954084-13-dima@arista.com> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230614230947.3954084-1-dima@arista.com> References: <20230614230947.3954084-1-dima@arista.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.org Now there is a common function to verify signature on TCP segments: tcp_inbound_hash(). It has checks for all possible cross-interactions with MD5 signs as well as with unsigned segments. The rules from RFC5925 are: (1) Any TCP segment can have at max only one signature. (2) TCP connections can't switch between using TCP-MD5 and TCP-AO. (3) TCP-AO connections can't stop using AO, as well as unsigned connections can't suddenly start using AO. Co-developed-by: Francesco Ruggeri Signed-off-by: Francesco Ruggeri Co-developed-by: Salam Noureddine Signed-off-by: Salam Noureddine Signed-off-by: Dmitry Safonov --- include/net/dropreason-core.h | 17 ++++ include/net/tcp.h | 53 ++++++++++- include/net/tcp_ao.h | 17 ++++ net/ipv4/tcp.c | 39 ++------- net/ipv4/tcp_ao.c | 160 ++++++++++++++++++++++++++++++++++ net/ipv4/tcp_ipv4.c | 10 +-- net/ipv6/tcp_ao.c | 13 +++ net/ipv6/tcp_ipv6.c | 11 +-- 8 files changed, 277 insertions(+), 43 deletions(-) diff --git a/include/net/dropreason-core.h b/include/net/dropreason-core.h index 383ac5215284..0ff272d3b680 100644 --- a/include/net/dropreason-core.h +++ b/include/net/dropreason-core.h @@ -24,6 +24,10 @@ FN(TCP_MD5NOTFOUND) \ FN(TCP_MD5UNEXPECTED) \ FN(TCP_MD5FAILURE) \ + FN(TCP_AONOTFOUND) \ + FN(TCP_AOUNEXPECTED) \ + FN(TCP_AOKEYNOTFOUND) \ + FN(TCP_AOFAILURE) \ FN(SOCKET_BACKLOG) \ FN(TCP_FLAGS) \ FN(TCP_ZEROWINDOW) \ @@ -160,6 +164,19 @@ enum skb_drop_reason { * to LINUX_MIB_TCPMD5FAILURE */ SKB_DROP_REASON_TCP_MD5FAILURE, + /** + * @SKB_DROP_REASON_TCP_AONOTFOUND: no TCP-AO hash and one was expected + */ + SKB_DROP_REASON_TCP_AONOTFOUND, + /** + * @SKB_DROP_REASON_TCP_AOUNEXPECTED: TCP-AO hash is present and it + * was not expected. + */ + SKB_DROP_REASON_TCP_AOUNEXPECTED, + /** @SKB_DROP_REASON_TCP_AOKEYNOTFOUND: TCP-AO key is unknown */ + SKB_DROP_REASON_TCP_AOKEYNOTFOUND, + /** @SKB_DROP_REASON_TCP_AOFAILURE: TCP-AO hash is wrong */ + SKB_DROP_REASON_TCP_AOFAILURE, /** * @SKB_DROP_REASON_SOCKET_BACKLOG: failed to add skb to socket backlog ( * see LINUX_MIB_TCPBACKLOGDROP) diff --git a/include/net/tcp.h b/include/net/tcp.h index 1d38ecac9b00..b3fa6aada5c7 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -1738,7 +1738,7 @@ tcp_md5_do_lookup_any_l3index(const struct sock *sk, enum skb_drop_reason tcp_inbound_md5_hash(const struct sock *sk, const struct sk_buff *skb, const void *saddr, const void *daddr, - int family, int dif, int sdif); + int family, int l3index, const __u8 *hash_location); #define tcp_twsk_md5_key(twsk) ((twsk)->tw_md5_key) @@ -1760,7 +1760,7 @@ tcp_md5_do_lookup_any_l3index(const struct sock *sk, static inline enum skb_drop_reason tcp_inbound_md5_hash(const struct sock *sk, const struct sk_buff *skb, const void *saddr, const void *daddr, - int family, int dif, int sdif) + int family, int l3index, const __u8 *hash_location) { return SKB_NOT_DROPPED_YET; } @@ -2597,4 +2597,53 @@ static inline bool tcp_ao_required(struct sock *sk, const void *saddr, return false; } +/* Called with rcu_read_lock() */ +static inline enum skb_drop_reason +tcp_inbound_hash(struct sock *sk, const struct request_sock *req, + const struct sk_buff *skb, + const void *saddr, const void *daddr, + int family, int dif, int sdif) +{ + const struct tcphdr *th = tcp_hdr(skb); + const struct tcp_ao_hdr *aoh; + const __u8 *md5_location; + int l3index; + + /* Invalid option or two times meet any of auth options */ + if (tcp_parse_auth_options(th, &md5_location, &aoh)) + return SKB_DROP_REASON_TCP_AUTH_HDR; + + if (req) { + if (tcp_rsk_used_ao(req) != !!aoh) + return SKB_DROP_REASON_TCP_AOFAILURE; + } + + /* sdif set, means packet ingressed via a device + * in an L3 domain and dif is set to the l3mdev + */ + l3index = sdif ? dif : 0; + + /* Fast path: unsigned segments */ + if (likely(!md5_location && !aoh)) { + /* Drop if there's TCP-MD5 or TCP-AO key with any rcvid/sndid + * for the remote peer. On TCP-AO established connection + * the last key is impossible to remove, so there's + * always at least one current_key. + */ + if (tcp_ao_required(sk, saddr, family)) + return SKB_DROP_REASON_TCP_AONOTFOUND; + if (unlikely(tcp_md5_do_lookup(sk, l3index, saddr, family))) { + NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMD5NOTFOUND); + return SKB_DROP_REASON_TCP_MD5NOTFOUND; + } + return SKB_NOT_DROPPED_YET; + } + + if (aoh) + return tcp_inbound_ao_hash(sk, skb, family, req, aoh); + + return tcp_inbound_md5_hash(sk, skb, saddr, daddr, family, + l3index, md5_location); +} + #endif /* _TCP_H */ diff --git a/include/net/tcp_ao.h b/include/net/tcp_ao.h index 933b39445575..880eeee4a6b9 100644 --- a/include/net/tcp_ao.h +++ b/include/net/tcp_ao.h @@ -116,6 +116,9 @@ struct tcp6_ao_context { __be32 disn; }; +#define TCP_AO_ESTABLISHED (TCPF_ESTABLISHED|TCPF_FIN_WAIT1|TCPF_FIN_WAIT2|\ + TCPF_CLOSE|TCPF_CLOSE_WAIT|TCPF_LAST_ACK|TCPF_CLOSING) + int tcp_ao_hash_skb(unsigned short int family, char *ao_hash, struct tcp_ao_key *key, const struct sock *sk, const struct sk_buff *skb, @@ -132,6 +135,10 @@ int tcp_ao_calc_traffic_key(struct tcp_ao_key *mkt, u8 *key, void *ctx, void tcp_ao_destroy_sock(struct sock *sk, bool twsk); u32 tcp_ao_compute_sne(u32 sne, u32 seq, u32 new_seq); void tcp_ao_time_wait(struct tcp_timewait_sock *tcptw, struct tcp_sock *tp); +enum skb_drop_reason tcp_inbound_ao_hash(struct sock *sk, + const struct sk_buff *skb, unsigned short int family, + const struct request_sock *req, + const struct tcp_ao_hdr *aoh); struct tcp_ao_key *tcp_ao_do_lookup(const struct sock *sk, const union tcp_ao_addr *addr, int family, int sndid, int rcvid, u16 port); @@ -168,6 +175,9 @@ struct tcp_sigpool; int tcp_v6_ao_hash_pseudoheader(struct tcp_sigpool *hp, const struct in6_addr *daddr, const struct in6_addr *saddr, int nbytes); +int tcp_v6_ao_calc_key_skb(struct tcp_ao_key *mkt, u8 *key, + const struct sk_buff *skb, __be32 sisn, + __be32 disn); int tcp_v6_ao_calc_key_sk(struct tcp_ao_key *mkt, u8 *key, const struct sock *sk, __be32 sisn, __be32 disn, bool send); @@ -203,6 +213,13 @@ static inline void tcp_ao_syncookie(struct sock *sk, const struct sk_buff *skb, { } +static inline enum skb_drop_reason tcp_inbound_ao_hash(struct sock *sk, + const struct sk_buff *skb, unsigned short int family, + const struct request_sock *req, const struct tcp_ao_hdr *aoh) +{ + return SKB_NOT_DROPPED_YET; +} + static inline struct tcp_ao_key *tcp_ao_do_lookup(const struct sock *sk, const union tcp_ao_addr *addr, int family, int sndid, int rcvid, u16 port) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 66e324b0364c..20e16ada8d5d 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -4477,42 +4477,23 @@ EXPORT_SYMBOL(tcp_md5_hash_key); enum skb_drop_reason tcp_inbound_md5_hash(const struct sock *sk, const struct sk_buff *skb, const void *saddr, const void *daddr, - int family, int dif, int sdif) + int family, int l3index, const __u8 *hash_location) { - /* - * This gets called for each TCP segment that arrives - * so we want to be efficient. + /* This gets called for each TCP segment that has TCP-MD5 option. * We have 3 drop cases: * o No MD5 hash and one expected. * o MD5 hash and we're not expecting one. * o MD5 hash and its wrong. */ - const __u8 *hash_location = NULL; - struct tcp_md5sig_key *hash_expected; const struct tcphdr *th = tcp_hdr(skb); const struct tcp_sock *tp = tcp_sk(sk); - int genhash, l3index; + struct tcp_md5sig_key *key; + int genhash; u8 newhash[16]; - /* sdif set, means packet ingressed via a device - * in an L3 domain and dif is set to the l3mdev - */ - l3index = sdif ? dif : 0; + key = tcp_md5_do_lookup(sk, l3index, saddr, family); - hash_expected = tcp_md5_do_lookup(sk, l3index, saddr, family); - if (tcp_parse_auth_options(th, &hash_location, NULL)) - return SKB_DROP_REASON_TCP_AUTH_HDR; - - /* We've parsed the options - do we have a hash? */ - if (!hash_expected && !hash_location) - return SKB_NOT_DROPPED_YET; - - if (hash_expected && !hash_location) { - NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMD5NOTFOUND); - return SKB_DROP_REASON_TCP_MD5NOTFOUND; - } - - if (!hash_expected && hash_location) { + if (!key && hash_location) { NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMD5UNEXPECTED); return SKB_DROP_REASON_TCP_MD5UNEXPECTED; } @@ -4522,14 +4503,10 @@ tcp_inbound_md5_hash(const struct sock *sk, const struct sk_buff *skb, * IPv4-mapped case. */ if (family == AF_INET) - genhash = tcp_v4_md5_hash_skb(newhash, - hash_expected, - NULL, skb); + genhash = tcp_v4_md5_hash_skb(newhash, key, NULL, skb); else - genhash = tp->af_specific->calc_md5_hash(newhash, - hash_expected, + genhash = tp->af_specific->calc_md5_hash(newhash, key, NULL, skb); - if (genhash || memcmp(hash_location, newhash, 16) != 0) { NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMD5FAILURE); if (family == AF_INET) { diff --git a/net/ipv4/tcp_ao.c b/net/ipv4/tcp_ao.c index a22d6321bc81..3f405bf1fd82 100644 --- a/net/ipv4/tcp_ao.c +++ b/net/ipv4/tcp_ao.c @@ -322,6 +322,30 @@ int tcp_v4_ao_calc_key_rsk(struct tcp_ao_key *mkt, u8 *key, htonl(tcp_rsk(req)->rcv_isn)); } +static int tcp_v4_ao_calc_key_skb(struct tcp_ao_key *mkt, u8 *key, + const struct sk_buff *skb, + __be32 sisn, __be32 disn) +{ + const struct iphdr *iph = ip_hdr(skb); + const struct tcphdr *th = tcp_hdr(skb); + + return tcp_v4_ao_calc_key(mkt, key, iph->saddr, iph->daddr, + th->source, th->dest, sisn, disn); +} + +static int tcp_ao_calc_key_skb(struct tcp_ao_key *mkt, u8 *key, + const struct sk_buff *skb, __be32 sisn, + __be32 disn, int family) +{ + if (family == AF_INET) + return tcp_v4_ao_calc_key_skb(mkt, key, skb, sisn, disn); +#if IS_ENABLED(CONFIG_IPV6) + else if (family == AF_INET6) + return tcp_v6_ao_calc_key_skb(mkt, key, skb, sisn, disn); +#endif + return -EAFNOSUPPORT; +} + static int tcp_v4_ao_hash_pseudoheader(struct tcp_sigpool *hp, __be32 daddr, __be32 saddr, int nbytes) @@ -701,6 +725,142 @@ void tcp_ao_syncookie(struct sock *sk, const struct sk_buff *skb, } EXPORT_SYMBOL_GPL(tcp_ao_syncookie); +static enum skb_drop_reason +tcp_ao_verify_hash(const struct sock *sk, const struct sk_buff *skb, + unsigned short int family, struct tcp_ao_info *info, + const struct tcp_ao_hdr *aoh, struct tcp_ao_key *key, + u8 *traffic_key, u8 *phash, u32 sne) +{ + unsigned char newhash[TCP_AO_MAX_HASH_SIZE] __tcp_ao_key_align; + u8 maclen = aoh->length - sizeof(struct tcp_ao_hdr); + const struct tcphdr *th = tcp_hdr(skb); + + if (maclen != tcp_ao_maclen(key)) + return SKB_DROP_REASON_TCP_AOFAILURE; + + /* XXX: make it per-AF callback? */ + tcp_ao_hash_skb(family, newhash, key, sk, skb, traffic_key, + (phash - (u8 *)th), sne); + if (memcmp(phash, newhash, maclen)) + return SKB_DROP_REASON_TCP_AOFAILURE; + return SKB_NOT_DROPPED_YET; +} + +enum skb_drop_reason +tcp_inbound_ao_hash(struct sock *sk, const struct sk_buff *skb, + unsigned short int family, const struct request_sock *req, + const struct tcp_ao_hdr *aoh) +{ + u8 key_buf[TCP_AO_MAX_HASH_SIZE] __tcp_ao_key_align; + const struct tcphdr *th = tcp_hdr(skb); + u8 *phash = (u8 *)(aoh + 1); /* hash goes just after the header */ + struct tcp_ao_info *info; + struct tcp_ao_key *key; + __be32 sisn, disn; + u8 *traffic_key; + u32 sne = 0; + + info = rcu_dereference(tcp_sk(sk)->ao_info); + if (!info) + return SKB_DROP_REASON_TCP_AOUNEXPECTED; + + if (unlikely(th->syn)) { + sisn = th->seq; + disn = 0; + } + + /* Fast-path */ + /* TODO: fix fastopen and simultaneous open (TCPF_SYN_RECV) */ + if (likely((1 << sk->sk_state) & (TCP_AO_ESTABLISHED | TCPF_SYN_RECV))) { + enum skb_drop_reason err; + struct tcp_ao_key *current_key; + + /* Check if this socket's rnext_key matches the keyid in the + * packet. If not we lookup the key based on the keyid + * matching the rcvid in the mkt. + */ + key = READ_ONCE(info->rnext_key); + if (key->rcvid != aoh->keyid) { + key = tcp_ao_established_key(info, -1, aoh->keyid); + if (!key) + goto key_not_found; + } + + /* Delayed retransmitted SYN */ + if (unlikely(th->syn && !th->ack)) + goto verify_hash; + + sne = tcp_ao_compute_sne(info->rcv_sne, info->rcv_sne_seq, + ntohl(th->seq)); + /* Established socket, traffic key are cached */ + traffic_key = rcv_other_key(key); + err = tcp_ao_verify_hash(sk, skb, family, info, aoh, key, + traffic_key, phash, sne); + if (err) + return err; + current_key = READ_ONCE(info->current_key); + /* Key rotation: the peer asks us to use new key (RNext) */ + if (unlikely(aoh->rnext_keyid != current_key->sndid)) { + /* If the key is not found we do nothing. */ + key = tcp_ao_established_key(info, aoh->rnext_keyid, -1); + if (key) + /* pairs with tcp_ao_del_cmd */ + WRITE_ONCE(info->current_key, key); + } + return SKB_NOT_DROPPED_YET; + } + + /* Lookup key based on peer address and keyid. + * current_key and rnext_key must not be used on tcp listen + * sockets as otherwise: + * - request sockets would race on those key pointers + * - tcp_ao_del_cmd() allows async key removal + */ + key = tcp_ao_inbound_lookup(family, sk, skb, -1, aoh->keyid); + if (!key) + goto key_not_found; + + if (th->syn && !th->ack) + goto verify_hash; + + if ((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_NEW_SYN_RECV)) { + /* Make the initial syn the likely case here */ + if (unlikely(req)) { + sne = tcp_ao_compute_sne(0, tcp_rsk(req)->rcv_isn, + ntohl(th->seq)); + sisn = htonl(tcp_rsk(req)->rcv_isn); + disn = htonl(tcp_rsk(req)->snt_isn); + } else if (unlikely(th->ack && !th->syn)) { + /* Possible syncookie packet */ + sisn = htonl(ntohl(th->seq) - 1); + disn = htonl(ntohl(th->ack_seq) - 1); + sne = tcp_ao_compute_sne(0, ntohl(sisn), + ntohl(th->seq)); + } else if (unlikely(!th->syn)) { + /* no way to figure out initial sisn/disn - drop */ + return SKB_DROP_REASON_TCP_FLAGS; + } + } else if (sk->sk_state == TCP_SYN_SENT) { + disn = info->lisn; + if (th->syn || th->rst) + sisn = th->seq; + else + sisn = info->risn; + } else { + WARN_ONCE(1, "TCP-AO: Unexpected sk_state %d", sk->sk_state); + return SKB_DROP_REASON_TCP_AOFAILURE; + } +verify_hash: + traffic_key = key_buf; + tcp_ao_calc_key_skb(key, traffic_key, skb, sisn, disn, family); + return tcp_ao_verify_hash(sk, skb, family, info, aoh, key, + traffic_key, phash, sne); + +key_not_found: + return SKB_DROP_REASON_TCP_AOKEYNOTFOUND; +} +EXPORT_SYMBOL_GPL(tcp_inbound_ao_hash); + static int tcp_ao_cache_traffic_keys(const struct sock *sk, struct tcp_ao_info *ao, struct tcp_ao_key *ao_key) diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 97712b954e2d..1a0c2f1485fa 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -2195,9 +2195,9 @@ int tcp_v4_rcv(struct sk_buff *skb) if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) drop_reason = SKB_DROP_REASON_XFRM_POLICY; else - drop_reason = tcp_inbound_md5_hash(sk, skb, - &iph->saddr, &iph->daddr, - AF_INET, dif, sdif); + drop_reason = tcp_inbound_hash(sk, req, skb, + &iph->saddr, &iph->daddr, + AF_INET, dif, sdif); if (unlikely(drop_reason)) { sk_drops_add(sk, skb); reqsk_put(req); @@ -2274,8 +2274,8 @@ int tcp_v4_rcv(struct sk_buff *skb) goto discard_and_relse; } - drop_reason = tcp_inbound_md5_hash(sk, skb, &iph->saddr, - &iph->daddr, AF_INET, dif, sdif); + drop_reason = tcp_inbound_hash(sk, NULL, skb, &iph->saddr, &iph->daddr, + AF_INET, dif, sdif); if (drop_reason) goto discard_and_relse; diff --git a/net/ipv6/tcp_ao.c b/net/ipv6/tcp_ao.c index bc032e441ef8..32e19b2dbda8 100644 --- a/net/ipv6/tcp_ao.c +++ b/net/ipv6/tcp_ao.c @@ -39,6 +39,18 @@ static int tcp_v6_ao_calc_key(struct tcp_ao_key *mkt, u8 *key, return tcp_ao_calc_traffic_key(mkt, key, &tmp, sizeof(tmp)); } +int tcp_v6_ao_calc_key_skb(struct tcp_ao_key *mkt, u8 *key, + const struct sk_buff *skb, + __be32 sisn, __be32 disn) +{ + const struct ipv6hdr *iph = ipv6_hdr(skb); + const struct tcphdr *th = tcp_hdr(skb); + + return tcp_v6_ao_calc_key(mkt, key, &iph->saddr, + &iph->daddr, th->source, + th->dest, sisn, disn); +} + int tcp_v6_ao_calc_key_sk(struct tcp_ao_key *mkt, u8 *key, const struct sock *sk, __be32 sisn, __be32 disn, bool send) @@ -52,6 +64,7 @@ int tcp_v6_ao_calc_key_sk(struct tcp_ao_key *mkt, u8 *key, &sk->sk_v6_rcv_saddr, sk->sk_dport, htons(sk->sk_num), disn, sisn); } +EXPORT_SYMBOL_GPL(tcp_v6_ao_calc_key_sk); int tcp_v6_ao_calc_key_rsk(struct tcp_ao_key *mkt, u8 *key, struct request_sock *req) diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 19f644970196..cd9b3714d8a6 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1784,9 +1784,9 @@ INDIRECT_CALLABLE_SCOPE int tcp_v6_rcv(struct sk_buff *skb) struct sock *nsk; sk = req->rsk_listener; - drop_reason = tcp_inbound_md5_hash(sk, skb, - &hdr->saddr, &hdr->daddr, - AF_INET6, dif, sdif); + drop_reason = tcp_inbound_hash(sk, req, skb, + &hdr->saddr, &hdr->daddr, + AF_INET6, dif, sdif); if (drop_reason) { sk_drops_add(sk, skb); reqsk_put(req); @@ -1859,8 +1859,8 @@ INDIRECT_CALLABLE_SCOPE int tcp_v6_rcv(struct sk_buff *skb) goto discard_and_relse; } - drop_reason = tcp_inbound_md5_hash(sk, skb, &hdr->saddr, &hdr->daddr, - AF_INET6, dif, sdif); + drop_reason = tcp_inbound_hash(sk, NULL, skb, &hdr->saddr, &hdr->daddr, + AF_INET6, dif, sdif); if (drop_reason) goto discard_and_relse; @@ -2088,6 +2088,7 @@ static const struct tcp_sock_af_ops tcp_sock_ipv6_mapped_specific = { .ao_lookup = tcp_v6_ao_lookup, .calc_ao_hash = tcp_v4_ao_hash_skb, .ao_parse = tcp_v6_parse_ao, + .ao_calc_key_sk = tcp_v4_ao_calc_key_sk, #endif }; #endif