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Message-ID: <1432798090-20657-3-git-send-email-steffen.klassert@secunet.com> Date: Thu, 28 May 2015 09:28:05 +0200 From: Steffen Klassert <steffen.klassert@...unet.com> To: David Miller <davem@...emloft.net> CC: Herbert Xu <herbert@...dor.apana.org.au>, Steffen Klassert <steffen.klassert@...unet.com>, <netdev@...r.kernel.org> Subject: [PATCH 2/7] esp4: Use high-order sequence number bits for IV generation From: Herbert Xu <herbert@...dor.apana.org.au> 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@...dor.apana.org.au> Signed-off-by: Steffen Klassert <steffen.klassert@...unet.com> --- net/ipv4/esp4.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c index 421a80b..30b544f 100644 --- a/net/ipv4/esp4.c +++ b/net/ipv4/esp4.c @@ -256,7 +256,8 @@ static int esp_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); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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