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authorHerbert Xu <herbert@gondor.apana.org.au>2015-05-13 15:27:18 +0800
committerSteffen Klassert <steffen.klassert@secunet.com>2015-05-13 09:34:54 +0200
commit6d7258ca937027ae86d6d5938d7ae10b6d68f4a4 (patch)
tree2e7d96cc6907f5e7468910f33f98377b2afbe55e /net
parent64aa42338e9a88c139b89797163714f0f95f3c6b (diff)
esp6: Use high-order sequence number bits for IV generation
I noticed we were only using the low-order bits for IV generation when ESN is enabled. This is very bad because it means that the IV can repeat. We must use the full 64 bits. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/esp6.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index 31f1b5d5e2ef..7c07ce36aae2 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -248,7 +248,8 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
aead_givcrypt_set_crypt(req, sg, sg, clen, iv);
aead_givcrypt_set_assoc(req, asg, assoclen);
aead_givcrypt_set_giv(req, esph->enc_data,
- XFRM_SKB_CB(skb)->seq.output.low);
+ XFRM_SKB_CB(skb)->seq.output.low +
+ ((u64)XFRM_SKB_CB(skb)->seq.output.hi << 32));
ESP_SKB_CB(skb)->tmp = tmp;
err = crypto_aead_givencrypt(req);