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authorHerbert Xu <herbert@gondor.apana.org.au>2008-01-28 19:37:29 -0800
committerDavid S. Miller <davem@davemloft.net>2008-01-31 19:27:03 -0800
commit1a6509d991225ad210de54c63314fd9542922095 (patch)
treeafe5c560388558bebd3e21b7c6f789a28a323a51 /include/net/xfrm.h
parent6fbf2cb77461a0cd0675228d20dd0f70d7b2251f (diff)
[IPSEC]: Add support for combined mode algorithms
This patch adds support for combined mode algorithms with GCM being the first algorithm supported. Combined mode algorithms can be added through the xfrm_user interface using the new algorithm payload type XFRMA_ALG_AEAD. Each algorithms is identified by its name and the ICV length. For the purposes of matching algorithms in xfrm_tmpl structures, combined mode algorithms occupy the same name space as encryption algorithms. This is in line with how they are negotiated using IKE. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/xfrm.h')
-rw-r--r--include/net/xfrm.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 5ebb9ba479b..34d373775a0 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -159,6 +159,7 @@ struct xfrm_state
struct xfrm_algo *aalg;
struct xfrm_algo *ealg;
struct xfrm_algo *calg;
+ struct xfrm_algo_aead *aead;
/* Data for encapsulator */
struct xfrm_encap_tmpl *encap;
@@ -1108,6 +1109,10 @@ static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
/*
* xfrm algorithm information
*/
+struct xfrm_algo_aead_info {
+ u16 icv_truncbits;
+};
+
struct xfrm_algo_auth_info {
u16 icv_truncbits;
u16 icv_fullbits;
@@ -1127,6 +1132,7 @@ struct xfrm_algo_desc {
char *compat;
u8 available:1;
union {
+ struct xfrm_algo_aead_info aead;
struct xfrm_algo_auth_info auth;
struct xfrm_algo_encr_info encr;
struct xfrm_algo_comp_info comp;
@@ -1343,6 +1349,8 @@ extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe);
extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe);
extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe);
+extern struct xfrm_algo_desc *xfrm_aead_get_byname(char *name, int icv_len,
+ int probe);
struct hash_desc;
struct scatterlist;