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| author |   David Lebrun <david.lebrun@uclouvain.be> | 2016-11-08 14:59:19 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-11-09 20:40:06 -0500 |
| commit | 9baee83406d6a4b02222f5ee21511c3f4c19e39d (patch) | |
| tree | 2a048ee6d143496156dbfe71402f84971cf41ec3 | |
| parent | ipv6: sr: implement API to control SR HMAC structure (diff) | |
| download | linux-dev-9baee83406d6a4b02222f5ee21511c3f4c19e39d.tar.xz linux-dev-9baee83406d6a4b02222f5ee21511c3f4c19e39d.zip | |
ipv6: sr: add calls to verify and insert HMAC signatures
This patch enables the verification of the HMAC signature for transiting
SR-enabled packets, and its insertion on encapsulated/injected SRH.
Signed-off-by: David Lebrun <david.lebrun@uclouvain.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv6/exthdrs.c | 10 | ||||
| -rw-r--r-- | net/ipv6/seg6_iptunnel.c | 21 |
2 files changed, 31 insertions, 0 deletions
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c index b8ba3961ff8a..541cfa6345e5 100644 --- a/net/ipv6/exthdrs.c +++ b/net/ipv6/exthdrs.c @@ -49,6 +49,9 @@ #endif #include <linux/seg6.h> #include <net/seg6.h> +#ifdef CONFIG_IPV6_SEG6_HMAC +#include <net/seg6_hmac.h> +#endif #include <linux/uaccess.h> @@ -340,6 +343,13 @@ static int ipv6_srh_rcv(struct sk_buff *skb) return -1; } +#ifdef CONFIG_IPV6_SEG6_HMAC + if (!seg6_hmac_validate_skb(skb)) { + kfree_skb(skb); + return -1; + } +#endif + looped_back: if (hdr->segments_left > 0) { if (hdr->nexthdr != NEXTHDR_IPV6 && hdr->segments_left == 1 && diff --git a/net/ipv6/seg6_iptunnel.c b/net/ipv6/seg6_iptunnel.c index 39762b2fa7a2..bbfca22c34ae 100644 --- a/net/ipv6/seg6_iptunnel.c +++ b/net/ipv6/seg6_iptunnel.c @@ -29,6 +29,9 @@ #ifdef CONFIG_DST_CACHE #include <net/dst_cache.h> #endif +#ifdef CONFIG_IPV6_SEG6_HMAC +#include <net/seg6_hmac.h> +#endif struct seg6_lwt { #ifdef CONFIG_DST_CACHE @@ -130,6 +133,14 @@ static int seg6_do_srh_encap(struct sk_buff *skb, struct ipv6_sr_hdr *osrh) hdr->daddr = isrh->segments[isrh->first_segment]; set_tun_src(net, skb->dev, &hdr->daddr, &hdr->saddr); +#ifdef CONFIG_IPV6_SEG6_HMAC + if (sr_has_hmac(isrh)) { + err = seg6_push_hmac(net, &hdr->saddr, isrh); + if (unlikely(err)) + return err; + } +#endif + skb_postpush_rcsum(skb, hdr, tot_len); return 0; @@ -172,6 +183,16 @@ static int seg6_do_srh_inline(struct sk_buff *skb, struct ipv6_sr_hdr *osrh) isrh->segments[0] = hdr->daddr; hdr->daddr = isrh->segments[isrh->first_segment]; +#ifdef CONFIG_IPV6_SEG6_HMAC + if (sr_has_hmac(isrh)) { + struct net *net = dev_net(skb_dst(skb)->dev); + + err = seg6_push_hmac(net, &hdr->saddr, isrh); + if (unlikely(err)) + return err; + } +#endif + skb_postpush_rcsum(skb, hdr, sizeof(struct ipv6hdr) + hdrlen); return 0; |