From 405137d16fbe4c80b9e06e61af05856027745d23 Mon Sep 17 00:00:00 2001
From: Joy Latten <latten@austin.ibm.com>
Date: Thu, 7 Feb 2008 23:11:56 -0800
Subject: [IPSEC]: Add support for aes-ctr.

The below patch allows IPsec to use CTR mode with AES encryption
algorithm. Tested this using setkey in ipsec-tools.

Signed-off-by: Joy Latten <latten@austin.ibm.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/xfrm/xfrm_algo.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'net/xfrm/xfrm_algo.c')

diff --git a/net/xfrm/xfrm_algo.c b/net/xfrm/xfrm_algo.c
index 6cc15250de6..8aa6440d689 100644
--- a/net/xfrm/xfrm_algo.c
+++ b/net/xfrm/xfrm_algo.c
@@ -399,6 +399,23 @@ static struct xfrm_algo_desc ealg_list[] = {
 		.sadb_alg_maxbits = 256
 	}
 },
+{
+	.name = "rfc3686(ctr(aes))",
+
+	.uinfo = {
+		.encr = {
+			.blockbits = 128,
+			.defkeybits = 160, /* 128-bit key + 32-bit nonce */
+		}
+	},
+
+	.desc = {
+		.sadb_alg_id = SADB_X_EALG_AESCTR,
+		.sadb_alg_ivlen	= 8,
+		.sadb_alg_minbits = 128,
+		.sadb_alg_maxbits = 256
+	}
+},
 };
 
 static struct xfrm_algo_desc calg_list[] = {
-- 
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