/*
* Copyright (C)2002 USAGI/WIDE Project
- *
+ *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
- *
+ *
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
- *
+ *
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Authors
*
- * Mitsuru KANDA @USAGI : IPv6 Support
+ * Mitsuru KANDA @USAGI : IPv6 Support
* Kazunori MIYAZAWA @USAGI :
* Kunihiro Ishiguro <kunihiro@ipinfusion.com>
- *
+ *
* This file is derived from net/ipv4/ah.c.
*/
optlen = 1;
break;
default:
- if (len < 2)
+ if (len < 2)
goto bad;
optlen = opt[off+1]+2;
if (len < optlen)
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
segments_left = rthdr->segments_left;
if (segments_left == 0)
return;
- rthdr->segments_left = 0;
+ rthdr->segments_left = 0;
/* The value of rthdr->hdrlen has been verified either by the system
* call if it is locally generated, or by ipv6_rthdr_rcv() for incoming
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;
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",
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;
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;
}
top_iph->hop_limit = 0;
ahp = x->data;
- ah->hdrlen = (XFRM_ALIGN8(sizeof(struct ipv6_auth_hdr) +
+ ah->hdrlen = (XFRM_ALIGN8(sizeof(struct ipv6_auth_hdr) +
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);
- 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);
}
* Moving the pointer of skb->nh.raw by using skb_pull as long as AH
* header length. Then copy back the copy as long as hdr_len
* If destination header following AH exists, copy it into after [Ext2].
- *
+ *
* |<>|[IPv6][Ext1][Ext2][Dest][Payload]
* There is offset of AH before IPv6 header after the process.
*/
u16 hdr_len;
u16 ah_hlen;
int nexthdr;
+ int err = -EINVAL;
if (!pskb_may_pull(skb, sizeof(struct ip_auth_hdr)))
goto out;
nexthdr = ah->nexthdr;
ah_hlen = (ah->hdrlen + 2) << 2;
- if (ah_hlen != XFRM_ALIGN8(sizeof(struct ipv6_auth_hdr) + ahp->icv_full_len) &&
- ah_hlen != XFRM_ALIGN8(sizeof(struct ipv6_auth_hdr) + ahp->icv_trunc_len))
- goto out;
+ if (ah_hlen != XFRM_ALIGN8(sizeof(struct ipv6_auth_hdr) + ahp->icv_full_len) &&
+ ah_hlen != XFRM_ALIGN8(sizeof(struct ipv6_auth_hdr) + ahp->icv_trunc_len))
+ goto out;
if (!pskb_may_pull(skb, ah_hlen))
goto out;
- tmp_hdr = kmalloc(hdr_len, GFP_ATOMIC);
+ tmp_hdr = kmemdup(skb->nh.raw, hdr_len, GFP_ATOMIC);
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;
skb->nh.ipv6h->flow_lbl[2] = 0;
skb->nh.ipv6h->hop_limit = 0;
- {
+ {
u8 auth_data[MAX_AH_AUTH_LEN];
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;
free_out:
kfree(tmp_hdr);
out:
- return -EINVAL;
+ return err;
}
-static void ah6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
- int type, int code, int offset, __u32 info)
+static void ah6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
+ int type, int code, int offset, __be32 info)
{
struct ipv6hdr *iph = (struct ipv6hdr*)skb->data;
struct ip_auth_hdr *ah = (struct ip_auth_hdr*)(skb->data+offset);
{
struct ah_data *ahp = NULL;
struct xfrm_algo_desc *aalg_desc;
+ struct crypto_hash *tfm;
if (!x->aalg)
goto error;
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->icv = ah_hmac_digest;
-
+
+ ahp->tfm = tfm;
+ if (crypto_hash_setkey(tfm, ahp->key, ahp->key_len))
+ goto error;
+
/*
* 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;
}
-
+
ahp->icv_full_len = aalg_desc->uinfo.auth.icv_fullbits/8;
ahp->icv_trunc_len = aalg_desc->uinfo.auth.icv_truncbits/8;
-
+
BUG_ON(ahp->icv_trunc_len > MAX_AH_AUTH_LEN);
-
+
ahp->work_icv = kmalloc(ahp->icv_full_len, GFP_KERNEL);
if (!ahp->work_icv)
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;
error:
if (ahp) {
kfree(ahp->work_icv);
- crypto_free_tfm(ahp->tfm);
+ crypto_free_hash(ahp->tfm);
kfree(ahp);
}
return -EINVAL;
kfree(ahp->work_icv);
ahp->work_icv = NULL;
- crypto_free_tfm(ahp->tfm);
+ crypto_free_hash(ahp->tfm);
ahp->tfm = NULL;
kfree(ahp);
}
.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 = {
projects / linux-drm-fsl-dcu.git / blobdiff