[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>
This commit is contained in:
Herbert Xu 2008-01-28 19:37:29 -08:00 committed by David S. Miller
parent 6fbf2cb774
commit 1a6509d991
7 changed files with 347 additions and 32 deletions

View file

@ -298,6 +298,12 @@ struct sadb_x_sec_ctx {
#define SADB_X_EALG_BLOWFISHCBC 7
#define SADB_EALG_NULL 11
#define SADB_X_EALG_AESCBC 12
#define SADB_X_EALG_AES_CCM_ICV8 14
#define SADB_X_EALG_AES_CCM_ICV12 15
#define SADB_X_EALG_AES_CCM_ICV16 16
#define SADB_X_EALG_AES_GCM_ICV8 18
#define SADB_X_EALG_AES_GCM_ICV12 19
#define SADB_X_EALG_AES_GCM_ICV16 20
#define SADB_X_EALG_CAMELLIACBC 22
#define SADB_EALG_MAX 253 /* last EALG */
/* private allocations should use 249-255 (RFC2407) */