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authorHerbert Xu <herbert@gondor.apana.org.au>2008-01-28 19:35:05 -0800
committerDavid S. Miller <davem@davemloft.net>2008-01-31 19:27:02 -0800
commit38320c70d282be1997a5204c7c7fe14c3aa6bfaa (patch)
treeaa86d8c3e26a3cc6d283a31b21116a35c7659f8f /include
parentbf164cc054d568fa7889ffab41d3b091f5758c75 (diff)
[IPSEC]: Use crypto_aead and authenc in ESP
This patch converts ESP to use the crypto_aead interface and in particular the authenc algorithm. This lays the foundations for future support of combined mode algorithms. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/esp.h54
1 files changed, 8 insertions, 46 deletions
diff --git a/include/net/esp.h b/include/net/esp.h
index c05f529bff2..d58451331db 100644
--- a/include/net/esp.h
+++ b/include/net/esp.h
@@ -1,58 +1,20 @@
#ifndef _NET_ESP_H
#define _NET_ESP_H
-#include <linux/crypto.h>
-#include <net/xfrm.h>
-#include <linux/scatterlist.h>
+#include <linux/skbuff.h>
-#define ESP_NUM_FAST_SG 4
+struct crypto_aead;
-struct esp_data
-{
- struct scatterlist sgbuf[ESP_NUM_FAST_SG];
-
- /* Confidentiality */
- struct {
- int padlen; /* 0..255 */
- /* ivlen is offset from enc_data, where encrypted data start.
- * It is logically different of crypto_tfm_alg_ivsize(tfm).
- * We assume that it is either zero (no ivec), or
- * >= crypto_tfm_alg_ivsize(tfm). */
- int ivlen;
- int ivinitted;
- u8 *ivec; /* ivec buffer */
- struct crypto_blkcipher *tfm; /* crypto handle */
- } conf;
-
- /* Integrity. It is active when icv_full_len != 0 */
- struct {
- u8 *work_icv;
- int icv_full_len;
- int icv_trunc_len;
- struct crypto_hash *tfm;
- } auth;
+struct esp_data {
+ /* 0..255 */
+ int padlen;
+
+ /* Confidentiality & Integrity */
+ struct crypto_aead *aead;
};
extern void *pskb_put(struct sk_buff *skb, struct sk_buff *tail, int len);
-static inline int esp_mac_digest(struct esp_data *esp, struct sk_buff *skb,
- int offset, int len)
-{
- struct hash_desc desc;
- int err;
-
- desc.tfm = esp->auth.tfm;
- desc.flags = 0;
-
- err = crypto_hash_init(&desc);
- if (unlikely(err))
- return err;
- err = skb_icv_walk(skb, &desc, offset, len, crypto_hash_update);
- if (unlikely(err))
- return err;
- return crypto_hash_final(&desc, esp->auth.work_icv);
-}
-
struct ip_esp_hdr;
static inline struct ip_esp_hdr *ip_esp_hdr(const struct sk_buff *skb)