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| author |   Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
| commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
| tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/net/ah.h | |
| download | linux-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz linux-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip | |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/net/ah.h')
| -rw-r--r-- | include/net/ah.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/include/net/ah.h b/include/net/ah.h new file mode 100644 index 000000000000..ceff00afae09 --- /dev/null +++ b/include/net/ah.h @@ -0,0 +1,35 @@ +#ifndef _NET_AH_H +#define _NET_AH_H + +#include <net/xfrm.h> + +/* This is the maximum truncated ICV length that we know of. */ +#define MAX_AH_AUTH_LEN 12 + +struct ah_data +{ + u8 *key; + int key_len; + u8 *work_icv; + int icv_full_len; + int icv_trunc_len; + + void (*icv)(struct ah_data*, + struct sk_buff *skb, u8 *icv); + + struct crypto_tfm *tfm; +}; + +static inline void +ah_hmac_digest(struct ah_data *ahp, struct sk_buff *skb, u8 *auth_data) +{ + struct crypto_tfm *tfm = ahp->tfm; + + memset(auth_data, 0, ahp->icv_trunc_len); + crypto_hmac_init(tfm, ahp->key, &ahp->key_len); + skb_icv_walk(skb, tfm, 0, skb->len, crypto_hmac_update); + crypto_hmac_final(tfm, ahp->key, &ahp->key_len, ahp->work_icv); + memcpy(auth_data, ahp->work_icv, ahp->icv_trunc_len); +} + +#endif |