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Diffstat (limited to 'net/ipv6/ah6.c')
-rw-r--r--net/ipv6/ah6.c124
1 files changed, 106 insertions, 18 deletions
diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c
index 9d4831bd4335..b0d83e8e4252 100644
--- a/net/ipv6/ah6.c
+++ b/net/ipv6/ah6.c
@@ -74,6 +74,66 @@ bad:
return 0;
}
+#ifdef CONFIG_IPV6_MIP6
+/**
+ * ipv6_rearrange_destopt - rearrange IPv6 destination options header
+ * @iph: IPv6 header
+ * @destopt: destionation options header
+ */
+static void ipv6_rearrange_destopt(struct ipv6hdr *iph, struct ipv6_opt_hdr *destopt)
+{
+ u8 *opt = (u8 *)destopt;
+ int len = ipv6_optlen(destopt);
+ int off = 0;
+ int optlen = 0;
+
+ off += 2;
+ len -= 2;
+
+ while (len > 0) {
+
+ switch (opt[off]) {
+
+ case IPV6_TLV_PAD0:
+ optlen = 1;
+ break;
+ default:
+ if (len < 2)
+ goto bad;
+ optlen = opt[off+1]+2;
+ if (len < optlen)
+ goto bad;
+
+ /* Rearrange the source address in @iph and the
+ * addresses in home address option for final source.
+ * See 11.3.2 of RFC 3775 for details.
+ */
+ if (opt[off] == IPV6_TLV_HAO) {
+ struct in6_addr final_addr;
+ struct ipv6_destopt_hao *hao;
+
+ hao = (struct ipv6_destopt_hao *)&opt[off];
+ if (hao->length != sizeof(hao->addr)) {
+ if (net_ratelimit())
+ printk(KERN_WARNING "destopt hao: invalid header length: %u\n", hao->length);
+ goto bad;
+ }
+ ipv6_addr_copy(&final_addr, &hao->addr);
+ ipv6_addr_copy(&hao->addr, &iph->saddr);
+ ipv6_addr_copy(&iph->saddr, &final_addr);
+ }
+ break;
+ }
+
+ off += optlen;
+ len -= optlen;
+ }
+ /* Note: ok if len == 0 */
+bad:
+ return;
+}
+#endif
+
/**
* ipv6_rearrange_rthdr - rearrange IPv6 routing header
* @iph: IPv6 header
@@ -113,7 +173,7 @@ static void ipv6_rearrange_rthdr(struct ipv6hdr *iph, struct ipv6_rt_hdr *rthdr)
ipv6_addr_copy(&iph->daddr, &final_addr);
}
-static int ipv6_clear_mutable_options(struct ipv6hdr *iph, int len)
+static int ipv6_clear_mutable_options(struct ipv6hdr *iph, int len, int dir)
{
union {
struct ipv6hdr *iph;
@@ -128,8 +188,12 @@ static int ipv6_clear_mutable_options(struct ipv6hdr *iph, int len)
while (exthdr.raw < end) {
switch (nexthdr) {
- case NEXTHDR_HOP:
case NEXTHDR_DEST:
+#ifdef CONFIG_IPV6_MIP6
+ if (dir == XFRM_POLICY_OUT)
+ ipv6_rearrange_destopt(iph, exthdr.opth);
+#endif
+ case NEXTHDR_HOP:
if (!zero_out_mutable_opts(exthdr.opth)) {
LIMIT_NETDEBUG(
KERN_WARNING "overrun %sopts\n",
@@ -164,6 +228,9 @@ static int ah6_output(struct xfrm_state *x, struct sk_buff *skb)
u8 nexthdr;
char tmp_base[8];
struct {
+#ifdef CONFIG_IPV6_MIP6
+ struct in6_addr saddr;
+#endif
struct in6_addr daddr;
char hdrs[0];
} *tmp_ext;
@@ -188,10 +255,15 @@ static int ah6_output(struct xfrm_state *x, struct sk_buff *skb)
err = -ENOMEM;
goto error;
}
+#ifdef CONFIG_IPV6_MIP6
+ memcpy(tmp_ext, &top_iph->saddr, extlen);
+#else
memcpy(tmp_ext, &top_iph->daddr, extlen);
+#endif
err = ipv6_clear_mutable_options(top_iph,
extlen - sizeof(*tmp_ext) +
- sizeof(*top_iph));
+ sizeof(*top_iph),
+ XFRM_POLICY_OUT);
if (err)
goto error_free_iph;
}
@@ -213,13 +285,20 @@ static int ah6_output(struct xfrm_state *x, struct sk_buff *skb)
ah->spi = x->id.spi;
ah->seq_no = htonl(++x->replay.oseq);
xfrm_aevent_doreplay(x);
- ahp->icv(ahp, skb, ah->auth_data);
+ err = ah_mac_digest(ahp, skb, ah->auth_data);
+ if (err)
+ goto error_free_iph;
+ memcpy(ah->auth_data, ahp->work_icv, ahp->icv_trunc_len);
err = 0;
memcpy(top_iph, tmp_base, sizeof(tmp_base));
if (tmp_ext) {
+#ifdef CONFIG_IPV6_MIP6
+ memcpy(&top_iph->saddr, tmp_ext, extlen);
+#else
memcpy(&top_iph->daddr, tmp_ext, extlen);
+#endif
error_free_iph:
kfree(tmp_ext);
}
@@ -251,6 +330,7 @@ static int ah6_input(struct xfrm_state *x, struct sk_buff *skb)
u16 hdr_len;
u16 ah_hlen;
int nexthdr;
+ int err = -EINVAL;
if (!pskb_may_pull(skb, sizeof(struct ip_auth_hdr)))
goto out;
@@ -278,7 +358,7 @@ static int ah6_input(struct xfrm_state *x, struct sk_buff *skb)
if (!tmp_hdr)
goto out;
memcpy(tmp_hdr, skb->nh.raw, hdr_len);
- if (ipv6_clear_mutable_options(skb->nh.ipv6h, hdr_len))
+ if (ipv6_clear_mutable_options(skb->nh.ipv6h, hdr_len, XFRM_POLICY_IN))
goto free_out;
skb->nh.ipv6h->priority = 0;
skb->nh.ipv6h->flow_lbl[0] = 0;
@@ -292,8 +372,11 @@ static int ah6_input(struct xfrm_state *x, struct sk_buff *skb)
memcpy(auth_data, ah->auth_data, ahp->icv_trunc_len);
memset(ah->auth_data, 0, ahp->icv_trunc_len);
skb_push(skb, hdr_len);
- ahp->icv(ahp, skb, ah->auth_data);
- if (memcmp(ah->auth_data, auth_data, ahp->icv_trunc_len)) {
+ err = ah_mac_digest(ahp, skb, ah->auth_data);
+ if (err)
+ goto free_out;
+ err = -EINVAL;
+ if (memcmp(ahp->work_icv, auth_data, ahp->icv_trunc_len)) {
LIMIT_NETDEBUG(KERN_WARNING "ipsec ah authentication error\n");
x->stats.integrity_failed++;
goto free_out;
@@ -310,7 +393,7 @@ static int ah6_input(struct xfrm_state *x, struct sk_buff *skb)
free_out:
kfree(tmp_hdr);
out:
- return -EINVAL;
+ return err;
}
static void ah6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
@@ -338,6 +421,7 @@ static int ah6_init_state(struct xfrm_state *x)
{
struct ah_data *ahp = NULL;
struct xfrm_algo_desc *aalg_desc;
+ struct crypto_hash *tfm;
if (!x->aalg)
goto error;
@@ -355,24 +439,27 @@ static int ah6_init_state(struct xfrm_state *x)
ahp->key = x->aalg->alg_key;
ahp->key_len = (x->aalg->alg_key_len+7)/8;
- ahp->tfm = crypto_alloc_tfm(x->aalg->alg_name, 0);
- if (!ahp->tfm)
+ 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))
goto error;
- ahp->icv = ah_hmac_digest;
/*
* Lookup the algorithm description maintained by xfrm_algo,
* verify crypto transform properties, and store information
* we need for AH processing. This lookup cannot fail here
- * after a successful crypto_alloc_tfm().
+ * after a successful crypto_alloc_hash().
*/
aalg_desc = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
BUG_ON(!aalg_desc);
if (aalg_desc->uinfo.auth.icv_fullbits/8 !=
- crypto_tfm_alg_digestsize(ahp->tfm)) {
+ crypto_hash_digestsize(tfm)) {
printk(KERN_INFO "AH: %s digestsize %u != %hu\n",
- x->aalg->alg_name, crypto_tfm_alg_digestsize(ahp->tfm),
+ x->aalg->alg_name, crypto_hash_digestsize(tfm),
aalg_desc->uinfo.auth.icv_fullbits/8);
goto error;
}
@@ -387,7 +474,7 @@ static int ah6_init_state(struct xfrm_state *x)
goto error;
x->props.header_len = XFRM_ALIGN8(sizeof(struct ipv6_auth_hdr) + ahp->icv_trunc_len);
- if (x->props.mode)
+ if (x->props.mode == XFRM_MODE_TUNNEL)
x->props.header_len += sizeof(struct ipv6hdr);
x->data = ahp;
@@ -396,7 +483,7 @@ static int ah6_init_state(struct xfrm_state *x)
error:
if (ahp) {
kfree(ahp->work_icv);
- crypto_free_tfm(ahp->tfm);
+ crypto_free_hash(ahp->tfm);
kfree(ahp);
}
return -EINVAL;
@@ -411,7 +498,7 @@ static void ah6_destroy(struct xfrm_state *x)
kfree(ahp->work_icv);
ahp->work_icv = NULL;
- crypto_free_tfm(ahp->tfm);
+ crypto_free_hash(ahp->tfm);
ahp->tfm = NULL;
kfree(ahp);
}
@@ -424,7 +511,8 @@ static struct xfrm_type ah6_type =
.init_state = ah6_init_state,
.destructor = ah6_destroy,
.input = ah6_input,
- .output = ah6_output
+ .output = ah6_output,
+ .hdr_offset = xfrm6_find_1stfragopt,
};
static struct inet6_protocol ah6_protocol = {
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 01:41:32 +0100