From: Neil Horman <nhorman@redhat.com>
Date: Thu, 10 Apr 2008 15:10:03 -0400
Subject: [net] add aes-ctr algorithm to xfrm_nalgo
Message-id: 20080410191003.GA9914@hmsendeavour.rdu.redhat.com
O-Subject: [RHEL5.2 PATCH] Add aes-ctr algorithm to xfrm_nalgo (bz 441425)
Bugzilla: 441425

Hey-
	Backport of upstream commit 405137d16fbe4c80b9e06e61af05856027745d23.
Adds aes-ctr algorithm support.  Required for Ipv6 DOD certification and
satifies bz 441425

Neil

Acked-by: "David S. Miller" <davem@redhat.com>

diff --git a/net/xfrm/xfrm_nalgo.c b/net/xfrm/xfrm_nalgo.c
index 6d55cae..1fbc40a 100644
--- a/net/xfrm/xfrm_nalgo.c
+++ b/net/xfrm/xfrm_nalgo.c
@@ -332,6 +332,23 @@ static struct xfrm_nalgo_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_nalgo_desc calg_list[] = {