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xfrm: Define new XFRM netlink auth attribute with specified truncation bits

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The new XFRMA_ALG_AUTH_TRUNC attribute taking a xfrm_algo_auth as
argument allows the installation of authentication algorithms with
a truncation length specified in userspace, i.e. SHA256 with 128 bit
instead of 96 bit truncation.

Signed-off-by: Martin Willi <martin@strongswan.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Martin Willi 2009-11-25 00:29:51 +00:00 committed by David S. Miller
parent a661c4199b
commit 4e242d1616
1 changed files with 8 additions and 0 deletions
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8
include/linux/xfrm.h
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@ -90,6 +90,13 @@ struct xfrm_algo {
char alg_key[0]; char alg_key[0];
}; };
struct xfrm_algo_auth {
char alg_name[64];
unsigned int alg_key_len; /* in bits */
unsigned int alg_trunc_len; /* in bits */
char alg_key[0];
};
struct xfrm_algo_aead { struct xfrm_algo_aead {
char alg_name[64]; char alg_name[64];
unsigned int alg_key_len; /* in bits */ unsigned int alg_key_len; /* in bits */
@ -274,6 +281,7 @@ enum xfrm_attr_type_t {
XFRMA_MIGRATE, XFRMA_MIGRATE,
XFRMA_ALG_AEAD, /* struct xfrm_algo_aead */ XFRMA_ALG_AEAD, /* struct xfrm_algo_aead */
XFRMA_KMADDRESS, /* struct xfrm_user_kmaddress */ XFRMA_KMADDRESS, /* struct xfrm_user_kmaddress */
XFRMA_ALG_AUTH_TRUNC, /* struct xfrm_algo_auth */
__XFRMA_MAX __XFRMA_MAX
#define XFRMA_MAX (__XFRMA_MAX - 1) #define XFRMA_MAX (__XFRMA_MAX - 1)