diff options
Diffstat (limited to 'net/ipv4/ah4.c')
| -rw-r--r-- | net/ipv4/ah4.c | 50 |
1 files changed, 25 insertions, 25 deletions
diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c index 39f6211..4e8e3b0 100644 --- a/net/ipv4/ah4.c +++ b/net/ipv4/ah4.c @@ -5,6 +5,7 @@ #include <net/ah.h> #include <linux/crypto.h> #include <linux/pfkeyv2.h> +#include <linux/spinlock.h> #include <net/icmp.h> #include <net/protocol.h> #include <asm/scatterlist.h> @@ -65,6 +66,7 @@ static int ah_output(struct xfrm_state *x, struct sk_buff *skb) char buf[60]; } tmp_iph; + skb_push(skb, -skb_network_offset(skb)); top_iph = ip_hdr(skb); iph = &tmp_iph.iph; @@ -80,28 +82,30 @@ static int ah_output(struct xfrm_state *x, struct sk_buff *skb) goto error; } - ah = (struct ip_auth_hdr *)((char *)top_iph+top_iph->ihl*4); - ah->nexthdr = top_iph->protocol; + ah = ip_auth_hdr(skb); + ah->nexthdr = *skb_mac_header(skb); + *skb_mac_header(skb) = IPPROTO_AH; top_iph->tos = 0; top_iph->tot_len = htons(skb->len); top_iph->frag_off = 0; top_iph->ttl = 0; - top_iph->protocol = IPPROTO_AH; top_iph->check = 0; ahp = x->data; - ah->hdrlen = (XFRM_ALIGN8(sizeof(struct ip_auth_hdr) + - ahp->icv_trunc_len) >> 2) - 2; + ah->hdrlen = (XFRM_ALIGN8(sizeof(*ah) + ahp->icv_trunc_len) >> 2) - 2; ah->reserved = 0; ah->spi = x->id.spi; - ah->seq_no = htonl(++x->replay.oseq); - xfrm_aevent_doreplay(x); + ah->seq_no = htonl(XFRM_SKB_CB(skb)->seq); + + spin_lock_bh(&x->lock); err = ah_mac_digest(ahp, skb, ah->auth_data); + memcpy(ah->auth_data, ahp->work_icv, ahp->icv_trunc_len); + spin_unlock_bh(&x->lock); + if (err) goto error; - memcpy(ah->auth_data, ahp->work_icv, ahp->icv_trunc_len); top_iph->tos = iph->tos; top_iph->ttl = iph->ttl; @@ -111,8 +115,6 @@ static int ah_output(struct xfrm_state *x, struct sk_buff *skb) memcpy(top_iph+1, iph+1, top_iph->ihl*4 - sizeof(struct iphdr)); } - ip_send_check(top_iph); - err = 0; error: @@ -123,21 +125,23 @@ static int ah_input(struct xfrm_state *x, struct sk_buff *skb) { int ah_hlen; int ihl; + int nexthdr; int err = -EINVAL; struct iphdr *iph; struct ip_auth_hdr *ah; struct ah_data *ahp; char work_buf[60]; - if (!pskb_may_pull(skb, sizeof(struct ip_auth_hdr))) + if (!pskb_may_pull(skb, sizeof(*ah))) goto out; - ah = (struct ip_auth_hdr*)skb->data; + ah = (struct ip_auth_hdr *)skb->data; ahp = x->data; + nexthdr = ah->nexthdr; ah_hlen = (ah->hdrlen + 2) << 2; - if (ah_hlen != XFRM_ALIGN8(sizeof(struct ip_auth_hdr) + ahp->icv_full_len) && - ah_hlen != XFRM_ALIGN8(sizeof(struct ip_auth_hdr) + ahp->icv_trunc_len)) + if (ah_hlen != XFRM_ALIGN8(sizeof(*ah) + ahp->icv_full_len) && + ah_hlen != XFRM_ALIGN8(sizeof(*ah) + ahp->icv_trunc_len)) goto out; if (!pskb_may_pull(skb, ah_hlen)) @@ -151,7 +155,7 @@ static int ah_input(struct xfrm_state *x, struct sk_buff *skb) skb->ip_summed = CHECKSUM_NONE; - ah = (struct ip_auth_hdr*)skb->data; + ah = (struct ip_auth_hdr *)skb->data; iph = ip_hdr(skb); ihl = skb->data - skb_network_header(skb); @@ -180,13 +184,12 @@ static int ah_input(struct xfrm_state *x, struct sk_buff *skb) goto out; } } - ((struct iphdr*)work_buf)->protocol = ah->nexthdr; skb->network_header += ah_hlen; memcpy(skb_network_header(skb), work_buf, ihl); skb->transport_header = skb->network_header; __skb_pull(skb, ah_hlen + ihl); - return 0; + return nexthdr; out: return err; @@ -219,10 +222,6 @@ static int ah_init_state(struct xfrm_state *x) if (!x->aalg) goto error; - /* null auth can use a zero length key */ - if (x->aalg->alg_key_len > 512) - goto error; - if (x->encap) goto error; @@ -230,14 +229,13 @@ static int ah_init_state(struct xfrm_state *x) if (ahp == NULL) return -ENOMEM; - ahp->key = x->aalg->alg_key; - ahp->key_len = (x->aalg->alg_key_len+7)/8; tfm = crypto_alloc_hash(x->aalg->alg_name, 0, CRYPTO_ALG_ASYNC); if (IS_ERR(tfm)) goto error; ahp->tfm = tfm; - if (crypto_hash_setkey(tfm, ahp->key, ahp->key_len)) + if (crypto_hash_setkey(tfm, x->aalg->alg_key, + (x->aalg->alg_key_len + 7) / 8)) goto error; /* @@ -266,7 +264,8 @@ static int ah_init_state(struct xfrm_state *x) if (!ahp->work_icv) goto error; - x->props.header_len = XFRM_ALIGN8(sizeof(struct ip_auth_hdr) + ahp->icv_trunc_len); + x->props.header_len = XFRM_ALIGN8(sizeof(struct ip_auth_hdr) + + ahp->icv_trunc_len); if (x->props.mode == XFRM_MODE_TUNNEL) x->props.header_len += sizeof(struct iphdr); x->data = ahp; @@ -302,6 +301,7 @@ static struct xfrm_type ah_type = .description = "AH4", .owner = THIS_MODULE, .proto = IPPROTO_AH, + .flags = XFRM_TYPE_REPLAY_PROT, .init_state = ah_init_state, .destructor = ah_destroy, .input = ah_input, |
