Release 4.11 net/ipv4/esp4.c
#define pr_fmt(fmt) "IPsec: " fmt
#include <crypto/aead.h>
#include <crypto/authenc.h>
#include <linux/err.h>
#include <linux/module.h>
#include <net/ip.h>
#include <net/xfrm.h>
#include <net/esp.h>
#include <linux/scatterlist.h>
#include <linux/kernel.h>
#include <linux/pfkeyv2.h>
#include <linux/rtnetlink.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/in6.h>
#include <net/icmp.h>
#include <net/protocol.h>
#include <net/udp.h>
#include <linux/highmem.h>
struct esp_skb_cb {
struct xfrm_skb_cb xfrm;
void *tmp;
};
struct esp_output_extra {
__be32 seqhi;
u32 esphoff;
};
#define ESP_SKB_CB(__skb) ((struct esp_skb_cb *)&((__skb)->cb[0]))
static u32 esp4_get_mtu(struct xfrm_state *x, int mtu);
/*
* Allocate an AEAD request structure with extra space for SG and IV.
*
* For alignment considerations the IV is placed at the front, followed
* by the request and finally the SG list.
*
* TODO: Use spare space in skb for this where possible.
*/
static void *esp_alloc_tmp(struct crypto_aead *aead, int nfrags, int extralen)
{
unsigned int len;
len = extralen;
len += crypto_aead_ivsize(aead);
if (len) {
len += crypto_aead_alignmask(aead) &
~(crypto_tfm_ctx_alignment() - 1);
len = ALIGN(len, crypto_tfm_ctx_alignment());
}
len += sizeof(struct aead_request) + crypto_aead_reqsize(aead);
len = ALIGN(len, __alignof__(struct scatterlist));
len += sizeof(struct scatterlist) * nfrags;
return kmalloc(len, GFP_ATOMIC);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 86 | 79.63% | 5 | 55.56% |
Alexey Kuznetsov | 15 | 13.89% | 1 | 11.11% |
Steffen Klassert | 5 | 4.63% | 1 | 11.11% |
Arnaldo Carvalho de Melo | 1 | 0.93% | 1 | 11.11% |
James Morris | 1 | 0.93% | 1 | 11.11% |
Total | 108 | 100.00% | 9 | 100.00% |
static inline void *esp_tmp_extra(void *tmp)
{
return PTR_ALIGN(tmp, __alignof__(struct esp_output_extra));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 20 | 83.33% | 1 | 50.00% |
Herbert Xu | 4 | 16.67% | 1 | 50.00% |
Total | 24 | 100.00% | 2 | 100.00% |
static inline u8 *esp_tmp_iv(struct crypto_aead *aead, void *tmp, int extralen)
{
return crypto_aead_ivsize(aead) ?
PTR_ALIGN((u8 *)tmp + extralen,
crypto_aead_alignmask(aead) + 1) : tmp + extralen;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 40 | 83.33% | 2 | 40.00% |
Steffen Klassert | 4 | 8.33% | 1 | 20.00% |
Arnaldo Carvalho de Melo | 2 | 4.17% | 1 | 20.00% |
Alexey Kuznetsov | 2 | 4.17% | 1 | 20.00% |
Total | 48 | 100.00% | 5 | 100.00% |
static inline struct aead_request *esp_tmp_req(struct crypto_aead *aead, u8 *iv)
{
struct aead_request *req;
req = (void *)PTR_ALIGN(iv + crypto_aead_ivsize(aead),
crypto_tfm_ctx_alignment());
aead_request_set_tfm(req, aead);
return req;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 52 | 100.00% | 1 | 100.00% |
Total | 52 | 100.00% | 1 | 100.00% |
static inline struct scatterlist *esp_req_sg(struct crypto_aead *aead,
struct aead_request *req)
{
return (void *)ALIGN((unsigned long)(req + 1) +
crypto_aead_reqsize(aead),
__alignof__(struct scatterlist));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 48 | 100.00% | 1 | 100.00% |
Total | 48 | 100.00% | 1 | 100.00% |
static void esp_ssg_unref(struct xfrm_state *x, void *tmp)
{
struct esp_output_extra *extra = esp_tmp_extra(tmp);
struct crypto_aead *aead = x->data;
int extralen = 0;
u8 *iv;
struct aead_request *req;
struct scatterlist *sg;
if (x->props.flags & XFRM_STATE_ESN)
extralen += sizeof(*extra);
extra = esp_tmp_extra(tmp);
iv = esp_tmp_iv(aead, tmp, extralen);
req = esp_tmp_req(aead, iv);
/* Unref skb_frag_pages in the src scatterlist if necessary.
* Skip the first sg which comes from skb->data.
*/
if (req->src != req->dst)
for (sg = sg_next(req->src); sg; sg = sg_next(sg))
put_page(sg_page(sg));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 137 | 100.00% | 1 | 100.00% |
Total | 137 | 100.00% | 1 | 100.00% |
static void esp_output_done(struct crypto_async_request *base, int err)
{
struct sk_buff *skb = base->data;
void *tmp;
struct dst_entry *dst = skb_dst(skb);
struct xfrm_state *x = dst->xfrm;
tmp = ESP_SKB_CB(skb)->tmp;
esp_ssg_unref(x, tmp);
kfree(tmp);
xfrm_output_resume(skb, err);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 39 | 52.70% | 2 | 66.67% |
Steffen Klassert | 35 | 47.30% | 1 | 33.33% |
Total | 74 | 100.00% | 3 | 100.00% |
/* Move ESP header back into place. */
static void esp_restore_header(struct sk_buff *skb, unsigned int offset)
{
struct ip_esp_hdr *esph = (void *)(skb->data + offset);
void *tmp = ESP_SKB_CB(skb)->tmp;
__be32 *seqhi = esp_tmp_extra(tmp);
esph->seq_no = esph->spi;
esph->spi = *seqhi;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 67 | 100.00% | 3 | 100.00% |
Total | 67 | 100.00% | 3 | 100.00% |
static void esp_output_restore_header(struct sk_buff *skb)
{
void *tmp = ESP_SKB_CB(skb)->tmp;
struct esp_output_extra *extra = esp_tmp_extra(tmp);
esp_restore_header(skb, skb_transport_offset(skb) + extra->esphoff -
sizeof(__be32));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 51 | 100.00% | 3 | 100.00% |
Total | 51 | 100.00% | 3 | 100.00% |
static struct ip_esp_hdr *esp_output_set_extra(struct sk_buff *skb,
struct ip_esp_hdr *esph,
struct esp_output_extra *extra)
{
struct xfrm_state *x = skb_dst(skb)->xfrm;
/* For ESN we move the header forward by 4 bytes to
* accomodate the high bits. We will move it back after
* encryption.
*/
if ((x->props.flags & XFRM_STATE_ESN)) {
extra->esphoff = (unsigned char *)esph -
skb_transport_header(skb);
esph = (struct ip_esp_hdr *)((unsigned char *)esph - 4);
extra->seqhi = esph->spi;
esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.hi);
}
esph->spi = x->id.spi;
return esph;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 106 | 86.18% | 1 | 33.33% |
Herbert Xu | 17 | 13.82% | 2 | 66.67% |
Total | 123 | 100.00% | 3 | 100.00% |
static void esp_output_done_esn(struct crypto_async_request *base, int err)
{
struct sk_buff *skb = base->data;
esp_output_restore_header(skb);
esp_output_done(base, err);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 35 | 100.00% | 1 | 100.00% |
Total | 35 | 100.00% | 1 | 100.00% |
static void esp_output_fill_trailer(u8 *tail, int tfclen, int plen, __u8 proto)
{
/* Fill padding... */
if (tfclen) {
memset(tail, 0, tfclen);
tail += tfclen;
}
do {
int i;
for (i = 0; i < plen - 2; i++)
tail[i] = i + 1;
} while (0);
tail[plen - 2] = plen - 2;
tail[plen - 1] = proto;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 94 | 100.00% | 1 | 100.00% |
Total | 94 | 100.00% | 1 | 100.00% |
static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
{
struct esp_output_extra *extra;
int err = -ENOMEM;
struct ip_esp_hdr *esph;
struct crypto_aead *aead;
struct aead_request *req;
struct scatterlist *sg, *dsg;
struct sk_buff *trailer;
struct page *page;
void *tmp;
u8 *iv;
u8 *tail;
u8 *vaddr;
int blksize;
int clen;
int alen;
int plen;
int ivlen;
int tfclen;
int nfrags;
int assoclen;
int extralen;
int tailen;
__be64 seqno;
__u8 proto = *skb_mac_header(skb);
/* skb is pure payload to encrypt */
aead = x->data;
alen = crypto_aead_authsize(aead);
ivlen = crypto_aead_ivsize(aead);
tfclen = 0;
if (x->tfcpad) {
struct xfrm_dst *dst = (struct xfrm_dst *)skb_dst(skb);
u32 padto;
padto = min(x->tfcpad, esp4_get_mtu(x, dst->child_mtu_cached));
if (skb->len < padto)
tfclen = padto - skb->len;
}
blksize = ALIGN(crypto_aead_blocksize(aead), 4);
clen = ALIGN(skb->len + 2 + tfclen, blksize);
plen = clen - skb->len - tfclen;
tailen = tfclen + plen + alen;
assoclen = sizeof(*esph);
extralen = 0;
if (x->props.flags & XFRM_STATE_ESN) {
extralen += sizeof(*extra);
assoclen += sizeof(__be32);
}
*skb_mac_header(skb) = IPPROTO_ESP;
esph = ip_esp_hdr(skb);
/* this is non-NULL only with UDP Encapsulation */
if (x->encap) {
struct xfrm_encap_tmpl *encap = x->encap;
struct udphdr *uh;
__be32 *udpdata32;
__be16 sport, dport;
int encap_type;
spin_lock_bh(&x->lock);
sport = encap->encap_sport;
dport = encap->encap_dport;
encap_type = encap->encap_type;
spin_unlock_bh(&x->lock);
uh = (struct udphdr *)esph;
uh->source = sport;
uh->dest = dport;
uh->len = htons(skb->len + tailen
- skb_transport_offset(skb));
uh->check = 0;
switch (encap_type) {
default:
case UDP_ENCAP_ESPINUDP:
esph = (struct ip_esp_hdr *)(uh + 1);
break;
case UDP_ENCAP_ESPINUDP_NON_IKE:
udpdata32 = (__be32 *)(uh + 1);
udpdata32[0] = udpdata32[1] = 0;
esph = (struct ip_esp_hdr *)(udpdata32 + 2);
break;
}
*skb_mac_header(skb) = IPPROTO_UDP;
}
if (!skb_cloned(skb)) {
if (tailen <= skb_availroom(skb)) {
nfrags = 1;
trailer = skb;
tail = skb_tail_pointer(trailer);
goto skip_cow;
} else if ((skb_shinfo(skb)->nr_frags < MAX_SKB_FRAGS)
&& !skb_has_frag_list(skb)) {
int allocsize;
struct sock *sk = skb->sk;
struct page_frag *pfrag = &x->xfrag;
allocsize = ALIGN(tailen, L1_CACHE_BYTES);
spin_lock_bh(&x->lock);
if (unlikely(!skb_page_frag_refill(allocsize, pfrag, GFP_ATOMIC))) {
spin_unlock_bh(&x->lock);
goto cow;
}
page = pfrag->page;
get_page(page);
vaddr = kmap_atomic(page);
tail = vaddr + pfrag->offset;
esp_output_fill_trailer(tail, tfclen, plen, proto);
kunmap_atomic(vaddr);
nfrags = skb_shinfo(skb)->nr_frags;
__skb_fill_page_desc(skb, nfrags, page, pfrag->offset,
tailen);
skb_shinfo(skb)->nr_frags = ++nfrags;
pfrag->offset = pfrag->offset + allocsize;
nfrags++;
skb->len += tailen;
skb->data_len += tailen;
skb->truesize += tailen;
if (sk)
atomic_add(tailen, &sk->sk_wmem_alloc);
skb_push(skb, -skb_network_offset(skb));
esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.low);
esph->spi = x->id.spi;
tmp = esp_alloc_tmp(aead, nfrags + 2, extralen);
if (!tmp) {
spin_unlock_bh(&x->lock);
err = -ENOMEM;
goto error;
}
extra = esp_tmp_extra(tmp);
iv = esp_tmp_iv(aead, tmp, extralen);
req = esp_tmp_req(aead, iv);
sg = esp_req_sg(aead, req);
dsg = &sg[nfrags];
esph = esp_output_set_extra(skb, esph, extra);
sg_init_table(sg, nfrags);
skb_to_sgvec(skb, sg,
(unsigned char *)esph - skb->data,
assoclen + ivlen + clen + alen);
allocsize = ALIGN(skb->data_len, L1_CACHE_BYTES);
if (unlikely(!skb_page_frag_refill(allocsize, pfrag, GFP_ATOMIC))) {
spin_unlock_bh(&x->lock);
err = -ENOMEM;
goto error;
}
skb_shinfo(skb)->nr_frags = 1;
page = pfrag->page;
get_page(page);
/* replace page frags in skb with new page */
__skb_fill_page_desc(skb, 0, page, pfrag->offset, skb->data_len);
pfrag->offset = pfrag->offset + allocsize;
sg_init_table(dsg, skb_shinfo(skb)->nr_frags + 1);
skb_to_sgvec(skb, dsg,
(unsigned char *)esph - skb->data,
assoclen + ivlen + clen + alen);
spin_unlock_bh(&x->lock);
goto skip_cow2;
}
}
cow:
err = skb_cow_data(skb, tailen, &trailer);
if (err < 0)
goto error;
nfrags = err;
tail = skb_tail_pointer(trailer);
esph = ip_esp_hdr(skb);
skip_cow:
esp_output_fill_trailer(tail, tfclen, plen, proto);
pskb_put(skb, trailer, clen - skb->len + alen);
skb_push(skb, -skb_network_offset(skb));
esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.low);
esph->spi = x->id.spi;
tmp = esp_alloc_tmp(aead, nfrags, extralen);
if (!tmp) {
err = -ENOMEM;
goto error;
}
extra = esp_tmp_extra(tmp);
iv = esp_tmp_iv(aead, tmp, extralen);
req = esp_tmp_req(aead, iv);
sg = esp_req_sg(aead, req);
dsg = sg;
esph = esp_output_set_extra(skb, esph, extra);
sg_init_table(sg, nfrags);
skb_to_sgvec(skb, sg,
(unsigned char *)esph - skb->data,
assoclen + ivlen + clen + alen);
skip_cow2:
if ((x->props.flags & XFRM_STATE_ESN))
aead_request_set_callback(req, 0, esp_output_done_esn, skb);
else
aead_request_set_callback(req, 0, esp_output_done, skb);
aead_request_set_crypt(req, sg, dsg, ivlen + clen, iv);
aead_request_set_ad(req, assoclen);
seqno = cpu_to_be64(XFRM_SKB_CB(skb)->seq.output.low +
((u64)XFRM_SKB_CB(skb)->seq.output.hi << 32));
memset(iv, 0, ivlen);
memcpy(iv + ivlen - min(ivlen, 8), (u8 *)&seqno + 8 - min(ivlen, 8),
min(ivlen, 8));
ESP_SKB_CB(skb)->tmp = tmp;
err = crypto_aead_encrypt(req);
switch (err) {
case -EINPROGRESS:
goto error;
case -EBUSY:
err = NET_XMIT_DROP;
break;
case 0:
if ((x->props.flags & XFRM_STATE_ESN))
esp_output_restore_header(skb);
}
if (sg != dsg)
esp_ssg_unref(x, tmp);
kfree(tmp);
error:
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 919 | 62.01% | 4 | 18.18% |
Herbert Xu | 411 | 27.73% | 10 | 45.45% |
Martin Willi | 83 | 5.60% | 1 | 4.55% |
Alexey Kuznetsov | 37 | 2.50% | 1 | 4.55% |
Derek Atkins | 27 | 1.82% | 1 | 4.55% |
David S. Miller | 1 | 0.07% | 1 | 4.55% |
James Morris | 1 | 0.07% | 1 | 4.55% |
Wei Yongjun | 1 | 0.07% | 1 | 4.55% |
Al Viro | 1 | 0.07% | 1 | 4.55% |
Mathias Krause | 1 | 0.07% | 1 | 4.55% |
Total | 1482 | 100.00% | 22 | 100.00% |
static int esp_input_done2(struct sk_buff *skb, int err)
{
const struct iphdr *iph;
struct xfrm_state *x = xfrm_input_state(skb);
struct crypto_aead *aead = x->data;
int alen = crypto_aead_authsize(aead);
int hlen = sizeof(struct ip_esp_hdr) + crypto_aead_ivsize(aead);
int elen = skb->len - hlen;
int ihl;
u8 nexthdr[2];
int padlen;
kfree(ESP_SKB_CB(skb)->tmp);
if (unlikely(err))
goto out;
if (skb_copy_bits(skb, skb->len-alen-2, nexthdr, 2))
BUG();
err = -EINVAL;
padlen = nexthdr[0];
if (padlen + 2 + alen >= elen)
goto out;
/* ... check padding bits here. Silly. :-) */
iph = ip_hdr(skb);
ihl = iph->ihl * 4;
if (x->encap) {
struct xfrm_encap_tmpl *encap = x->encap;
struct udphdr *uh = (void *)(skb_network_header(skb) + ihl);
/*
* 1) if the NAT-T peer's IP or port changed then
* advertize the change to the keying daemon.
* This is an inbound SA, so just compare
* SRC ports.
*/
if (iph->saddr != x->props.saddr.a4 ||
uh->source != encap->encap_sport) {
xfrm_address_t ipaddr;
ipaddr.a4 = iph->saddr;
km_new_mapping(x, &ipaddr, uh->source);
/* XXX: perhaps add an extra
* policy check here, to see
* if we should allow or
* reject a packet from a
* different source
* address/port.
*/
}
/*
* 2) ignore UDP/TCP checksums in case
* of NAT-T in Transport Mode, or
* perform other post-processing fixes
* as per draft-ietf-ipsec-udp-encaps-06,
* section 3.1.2
*/
if (x->props.mode == XFRM_MODE_TRANSPORT)
skb->ip_summed = CHECKSUM_UNNECESSARY;
}
pskb_trim(skb, skb->len - alen - padlen - 2);
__skb_pull(skb, hlen);
if (x->props.mode == XFRM_MODE_TUNNEL)
skb_reset_transport_header(skb);
else
skb_set_transport_header(skb, -ihl);
err = nexthdr[1];
/* RFC4303: Drop dummy packets without any error */
if (err == IPPROTO_NONE)
err = -EINVAL;
out:
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 244 | 72.62% | 9 | 52.94% |
Alexey Kuznetsov | 65 | 19.35% | 1 | 5.88% |
Li RongQing | 16 | 4.76% | 1 | 5.88% |
Hideaki Yoshifuji / 吉藤英明 | 3 | 0.89% | 1 | 5.88% |
Derek Atkins | 2 | 0.60% | 1 | 5.88% |
David S. Miller | 2 | 0.60% | 1 | 5.88% |
Mathias Krause | 2 | 0.60% | 1 | 5.88% |
Eric Dumazet | 1 | 0.30% | 1 | 5.88% |
Patrick McHardy | 1 | 0.30% | 1 | 5.88% |
Total | 336 | 100.00% | 17 | 100.00% |
static void esp_input_done(struct crypto_async_request *base, int err)
{
struct sk_buff *skb = base->data;
xfrm_input_resume(skb, esp_input_done2(skb, err));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 35 | 100.00% | 1 | 100.00% |
Total | 35 | 100.00% | 1 | 100.00% |
static void esp_input_restore_header(struct sk_buff *skb)
{
esp_restore_header(skb, 0);
__skb_pull(skb, 4);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 15 | 60.00% | 1 | 50.00% |
Herbert Xu | 10 | 40.00% | 1 | 50.00% |
Total | 25 | 100.00% | 2 | 100.00% |
static void esp_input_set_header(struct sk_buff *skb, __be32 *seqhi)
{
struct xfrm_state *x = xfrm_input_state(skb);
struct ip_esp_hdr *esph = (struct ip_esp_hdr *)skb->data;
/* For ESN we move the header forward by 4 bytes to
* accomodate the high bits. We will move it back after
* decryption.
*/
if ((x->props.flags & XFRM_STATE_ESN)) {
esph = (void *)skb_push(skb, 4);
*seqhi = esph->spi;
esph->spi = esph->seq_no;
esph->seq_no = XFRM_SKB_CB(skb)->seq.input.hi;
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 87 | 89.69% | 1 | 33.33% |
Herbert Xu | 10 | 10.31% | 2 | 66.67% |
Total | 97 | 100.00% | 3 | 100.00% |
static void esp_input_done_esn(struct crypto_async_request *base, int err)
{
struct sk_buff *skb = base->data;
esp_input_restore_header(skb);
esp_input_done(base, err);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 31 | 88.57% | 2 | 50.00% |
David S. Miller | 3 | 8.57% | 1 | 25.00% |
Alexey Kuznetsov | 1 | 2.86% | 1 | 25.00% |
Total | 35 | 100.00% | 4 | 100.00% |
/*
* Note: detecting truncated vs. non-truncated authentication data is very
* expensive, so we only support truncated data, which is the recommended
* and common case.
*/
static int esp_input(struct xfrm_state *x, struct sk_buff *skb)
{
struct ip_esp_hdr *esph;
struct crypto_aead *aead = x->data;
struct aead_request *req;
struct sk_buff *trailer;
int ivlen = crypto_aead_ivsize(aead);
int elen = skb->len - sizeof(*esph) - ivlen;
int nfrags;
int assoclen;
int seqhilen;
__be32 *seqhi;
void *tmp;
u8 *iv;
struct scatterlist *sg;
int err = -EINVAL;
if (!pskb_may_pull(skb, sizeof(*esph) + ivlen))
goto out;
if (elen <= 0)
goto out;
assoclen = sizeof(*esph);
seqhilen = 0;
if (x->props.flags & XFRM_STATE_ESN) {
seqhilen += sizeof(__be32);
assoclen += seqhilen;
}
if (!skb_cloned(skb)) {
if (!skb_is_nonlinear(skb)) {
nfrags = 1;
goto skip_cow;
} else if (!skb_has_frag_list(skb)) {
nfrags = skb_shinfo(skb)->nr_frags;
nfrags++;
goto skip_cow;
}
}
err = skb_cow_data(skb, 0, &trailer);
if (err < 0)
goto out;
nfrags = err;
skip_cow:
err = -ENOMEM;
tmp = esp_alloc_tmp(aead, nfrags, seqhilen);
if (!tmp)
goto out;
ESP_SKB_CB(skb)->tmp = tmp;
seqhi = esp_tmp_extra(tmp);
iv = esp_tmp_iv(aead, tmp, seqhilen);
req = esp_tmp_req(aead, iv);
sg = esp_req_sg(aead, req);
esp_input_set_header(skb, seqhi);
sg_init_table(sg, nfrags);
skb_to_sgvec(skb, sg, 0, skb->len);
skb->ip_summed = CHECKSUM_NONE;
if ((x->props.flags & XFRM_STATE_ESN))
aead_request_set_callback(req, 0, esp_input_done_esn, skb);
else
aead_request_set_callback(req, 0, esp_input_done, skb);
aead_request_set_crypt(req, sg, sg, elen + ivlen, iv);
aead_request_set_ad(req, assoclen);
err = crypto_aead_decrypt(req);
if (err == -EINPROGRESS)
goto out;
if ((x->props.flags & XFRM_STATE_ESN))
esp_input_restore_header(skb);
err = esp_input_done2(skb, err);
out:
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 231 | 51.91% | 7 | 41.18% |
Steffen Klassert | 181 | 40.67% | 2 | 11.76% |
Alexey Kuznetsov | 15 | 3.37% | 1 | 5.88% |
Arnaldo Carvalho de Melo | 7 | 1.57% | 2 | 11.76% |
Thomas Graf | 7 | 1.57% | 2 | 11.76% |
Mathias Krause | 2 | 0.45% | 1 | 5.88% |
David S. Miller | 1 | 0.22% | 1 | 5.88% |
Derek Atkins | 1 | 0.22% | 1 | 5.88% |
Total | 445 | 100.00% | 17 | 100.00% |
static u32 esp4_get_mtu(struct xfrm_state *x, int mtu)
{
struct crypto_aead *aead = x->data;
u32 blksize = ALIGN(crypto_aead_blocksize(aead), 4);
unsigned int net_adj;
switch (x->props.mode) {
case XFRM_MODE_TRANSPORT:
case XFRM_MODE_BEET:
net_adj = sizeof(struct iphdr);
break;
case XFRM_MODE_TUNNEL:
net_adj = 0;
break;
default:
BUG();
}
return ((mtu - x->props.header_len - crypto_aead_authsize(aead) -
net_adj) & ~(blksize - 1)) + net_adj - 2;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Benjamin Poirier | 43 | 39.81% | 1 | 12.50% |
Alexey Kuznetsov | 39 | 36.11% | 1 | 12.50% |
Diego Beltrami | 12 | 11.11% | 1 | 12.50% |
Herbert Xu | 7 | 6.48% | 2 | 25.00% |
Patrick McHardy | 4 | 3.70% | 1 | 12.50% |
Mathias Krause | 3 | 2.78% | 2 | 25.00% |
Total | 108 | 100.00% | 8 | 100.00% |
static int esp4_err(struct sk_buff *skb, u32 info)
{
struct net *net = dev_net(skb->dev);
const struct iphdr *iph = (const struct iphdr *)skb->data;
struct ip_esp_hdr *esph = (struct ip_esp_hdr *)(skb->data+(iph->ihl<<2));
struct xfrm_state *x;
switch (icmp_hdr(skb)->type) {
case ICMP_DEST_UNREACH:
if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
return 0;
case ICMP_REDIRECT:
break;
default:
return 0;
}
x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
esph->spi, IPPROTO_ESP, AF_INET);
if (!x)
return 0;
if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH)
ipv4_update_pmtu(skb, net, info, 0, 0, IPPROTO_ESP, 0);
else
ipv4_redirect(skb, net, 0, 0, IPPROTO_ESP, 0);
xfrm_state_put(x);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Alexey Kuznetsov | 93 | 47.45% | 1 | 9.09% |
David S. Miller | 54 | 27.55% | 2 | 18.18% |
Alexey Dobriyan | 14 | 7.14% | 2 | 18.18% |
Steffen Klassert | 13 | 6.63% | 1 | 9.09% |
Hideaki Yoshifuji / 吉藤英明 | 8 | 4.08% | 1 | 9.09% |
Arnaldo Carvalho de Melo | 6 | 3.06% | 1 | 9.09% |
Jamal Hadi Salim | 4 | 2.04% | 1 | 9.09% |
Eric Dumazet | 3 | 1.53% | 1 | 9.09% |
Patrick McHardy | 1 | 0.51% | 1 | 9.09% |
Total | 196 | 100.00% | 11 | 100.00% |
static void esp_destroy(struct xfrm_state *x)
{
struct crypto_aead *aead = x->data;
if (!aead)
return;
crypto_free_aead(aead);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Alexey Kuznetsov | 19 | 61.29% | 1 | 16.67% |
Herbert Xu | 5 | 16.13% | 2 | 33.33% |
David S. Miller | 3 | 9.68% | 1 | 16.67% |
Mathias Krause | 3 | 9.68% | 1 | 16.67% |
Patrick McHardy | 1 | 3.23% | 1 | 16.67% |
Total | 31 | 100.00% | 6 | 100.00% |
static int esp_init_aead(struct xfrm_state *x)
{
char aead_name[CRYPTO_MAX_ALG_NAME];
struct crypto_aead *aead;
int err;
err = -ENAMETOOLONG;
if (snprintf(aead_name, CRYPTO_MAX_ALG_NAME, "%s(%s)",
x->geniv, x->aead->alg_name) >= CRYPTO_MAX_ALG_NAME)
goto error;
aead = crypto_alloc_aead(aead_name, 0, 0);
err = PTR_ERR(aead);
if (IS_ERR(aead))
goto error;
x->data = aead;
err = crypto_aead_setkey(aead, x->aead->alg_key,
(x->aead->alg_key_len + 7) / 8);
if (err)
goto error;
err = crypto_aead_setauthsize(aead, x->aead->alg_icv_len / 8);
if (err)
goto error;
error:
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 137 | 91.95% | 2 | 40.00% |
Alexey Kuznetsov | 9 | 6.04% | 1 | 20.00% |
Mathias Krause | 2 | 1.34% | 1 | 20.00% |
Patrick McHardy | 1 | 0.67% | 1 | 20.00% |
Total | 149 | 100.00% | 5 | 100.00% |
static int esp_init_authenc(struct xfrm_state *x)
{
struct crypto_aead *aead;
struct crypto_authenc_key_param *param;
struct rtattr *rta;
char *key;
char *p;
char authenc_name[CRYPTO_MAX_ALG_NAME];
unsigned int keylen;
int err;
err = -EINVAL;
if (!x->ealg)
goto error;
err = -ENAMETOOLONG;
if ((x->props.flags & XFRM_STATE_ESN)) {
if (snprintf(authenc_name, CRYPTO_MAX_ALG_NAME,
"%s%sauthencesn(%s,%s)%s",
x->geniv ?: "", x->geniv ? "(" : "",
x->aalg ? x->aalg->alg_name : "digest_null",
x->ealg->alg_name,
x->geniv ? ")" : "") >= CRYPTO_MAX_ALG_NAME)
goto error;
} else {
if (snprintf(authenc_name, CRYPTO_MAX_ALG_NAME,
"%s%sauthenc(%s,%s)%s",
x->geniv ?: "", x->geniv ? "(" : "",
x->aalg ? x->aalg->alg_name : "digest_null",
x->ealg->alg_name,
x->geniv ? ")" : "") >= CRYPTO_MAX_ALG_NAME)
goto error;
}
aead = crypto_alloc_aead(authenc_name, 0, 0);
err = PTR_ERR(aead);
if (IS_ERR(aead))
goto error;
x->data = aead;
keylen = (x->aalg ? (x->aalg->alg_key_len + 7) / 8 : 0) +
(x->ealg->alg_key_len + 7) / 8 + RTA_SPACE(sizeof(*param));
err = -ENOMEM;
key = kmalloc(keylen, GFP_KERNEL);
if (!key)
goto error;
p = key;
rta = (void *)p;
rta->rta_type = CRYPTO_AUTHENC_KEYA_PARAM;
rta->rta_len = RTA_LENGTH(sizeof(*param));
param = RTA_DATA(rta);
p += RTA_SPACE(sizeof(*param));
if (x->aalg) {
struct xfrm_algo_desc *aalg_desc;
memcpy(p, x->aalg->alg_key, (x->aalg->alg_key_len + 7) / 8);
p += (x->aalg->alg_key_len + 7) / 8;
aalg_desc = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
BUG_ON(!aalg_desc);
err = -EINVAL;
if (aalg_desc->uinfo.auth.icv_fullbits / 8 !=
crypto_aead_authsize(aead)) {
pr_info("ESP: %s digestsize %u != %hu\n",
x->aalg->alg_name,
crypto_aead_authsize(aead),
aalg_desc->uinfo.auth.icv_fullbits / 8);
goto free_key;
}
err = crypto_aead_setauthsize(
aead, x->aalg->alg_trunc_len / 8);
if (err)
goto free_key;
}
param->enckeylen = cpu_to_be32((x->ealg->alg_key_len + 7) / 8);
memcpy(p, x->ealg->alg_key, (x->ealg->alg_key_len + 7) / 8);
err = crypto_aead_setkey(aead, key, keylen);
free_key:
kfree(key);
error:
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 380 | 68.47% | 7 | 38.89% |
James Morris | 62 | 11.17% | 1 | 5.56% |
Steffen Klassert | 50 | 9.01% | 1 | 5.56% |
Alexey Kuznetsov | 45 | 8.11% | 2 | 11.11% |
David S. Miller | 7 | 1.26% | 1 | 5.56% |
Martin Willi | 4 | 0.72% | 1 | 5.56% |
Mathias Krause | 2 | 0.36% | 1 | 5.56% |
Krishna Kumar | 2 | 0.36% | 1 | 5.56% |
Ian Morris | 1 | 0.18% | 1 | 5.56% |
Joe Perches | 1 | 0.18% | 1 | 5.56% |
Andi Kleen | 1 | 0.18% | 1 | 5.56% |
Total | 555 | 100.00% | 18 | 100.00% |
static int esp_init_state(struct xfrm_state *x)
{
struct crypto_aead *aead;
u32 align;
int err;
x->data = NULL;
if (x->aead)
err = esp_init_aead(x);
else
err = esp_init_authenc(x);
if (err)
goto error;
aead = x->data;
x->props.header_len = sizeof(struct ip_esp_hdr) +
crypto_aead_ivsize(aead);
if (x->props.mode == XFRM_MODE_TUNNEL)
x->props.header_len += sizeof(struct iphdr);
else if (x->props.mode == XFRM_MODE_BEET && x->sel.family != AF_INET6)
x->props.header_len += IPV4_BEET_PHMAXLEN;
if (x->encap) {
struct xfrm_encap_tmpl *encap = x->encap;
switch (encap->encap_type) {
default:
goto error;
case UDP_ENCAP_ESPINUDP:
x->props.header_len += sizeof(struct udphdr);
break;
case UDP_ENCAP_ESPINUDP_NON_IKE:
x->props.header_len += sizeof(struct udphdr) + 2 * sizeof(u32);
break;
}
}
align = ALIGN(crypto_aead_blocksize(aead), 4);
x->props.trailer_len = align + 1 + crypto_aead_authsize(aead);
error:
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 69 | 30.26% | 4 | 23.53% |
Derek Atkins | 39 | 17.11% | 1 | 5.88% |
Patrick McHardy | 35 | 15.35% | 2 | 11.76% |
Alexey Kuznetsov | 33 | 14.47% | 2 | 11.76% |
Andreas Gruenbacher | 23 | 10.09% | 1 | 5.88% |
Joakim Koskela | 8 | 3.51% | 1 | 5.88% |
Tom Lendacky | 5 | 2.19% | 1 | 5.88% |
Hideaki Yoshifuji / 吉藤英明 | 5 | 2.19% | 1 | 5.88% |
Kazunori Miyazawa | 4 | 1.75% | 1 | 5.88% |
Mathias Krause | 3 | 1.32% | 1 | 5.88% |
David S. Miller | 2 | 0.88% | 1 | 5.88% |
Masahide Nakamura | 2 | 0.88% | 1 | 5.88% |
Total | 228 | 100.00% | 17 | 100.00% |
static int esp4_rcv_cb(struct sk_buff *skb, int err)
{
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 17 | 100.00% | 1 | 100.00% |
Total | 17 | 100.00% | 1 | 100.00% |
static const struct xfrm_type esp_type =
{
.description = "ESP4",
.owner = THIS_MODULE,
.proto = IPPROTO_ESP,
.flags = XFRM_TYPE_REPLAY_PROT,
.init_state = esp_init_state,
.destructor = esp_destroy,
.get_mtu = esp4_get_mtu,
.input = esp_input,
.output = esp_output
};
static struct xfrm4_protocol esp4_protocol = {
.handler = xfrm4_rcv,
.input_handler = xfrm_input,
.cb_handler = esp4_rcv_cb,
.err_handler = esp4_err,
.priority = 0,
};
static int __init esp4_init(void)
{
if (xfrm_register_type(&esp_type, AF_INET) < 0) {
pr_info("%s: can't add xfrm type\n", __func__);
return -EAGAIN;
}
if (xfrm4_protocol_register(&esp4_protocol, IPPROTO_ESP) < 0) {
pr_info("%s: can't add protocol\n", __func__);
xfrm_unregister_type(&esp_type, AF_INET);
return -EAGAIN;
}
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Alexey Kuznetsov | 56 | 80.00% | 1 | 20.00% |
Joe Perches | 8 | 11.43% | 1 | 20.00% |
Hideaki Yoshifuji / 吉藤英明 | 4 | 5.71% | 1 | 20.00% |
Thomas Schlichter | 1 | 1.43% | 1 | 20.00% |
Steffen Klassert | 1 | 1.43% | 1 | 20.00% |
Total | 70 | 100.00% | 5 | 100.00% |
static void __exit esp4_fini(void)
{
if (xfrm4_protocol_deregister(&esp4_protocol, IPPROTO_ESP) < 0)
pr_info("%s: can't remove protocol\n", __func__);
if (xfrm_unregister_type(&esp_type, AF_INET) < 0)
pr_info("%s: can't remove xfrm type\n", __func__);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Alexey Kuznetsov | 36 | 76.60% | 1 | 25.00% |
Joe Perches | 8 | 17.02% | 1 | 25.00% |
Hideaki Yoshifuji / 吉藤英明 | 2 | 4.26% | 1 | 25.00% |
Steffen Klassert | 1 | 2.13% | 1 | 25.00% |
Total | 47 | 100.00% | 4 | 100.00% |
module_init(esp4_init);
module_exit(esp4_fini);
MODULE_LICENSE("GPL");
MODULE_ALIAS_XFRM_TYPE(AF_INET, XFRM_PROTO_ESP);
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 2026 | 41.08% | 25 | 29.41% |
Steffen Klassert | 1735 | 35.18% | 5 | 5.88% |
Alexey Kuznetsov | 562 | 11.39% | 4 | 4.71% |
Martin Willi | 100 | 2.03% | 2 | 2.35% |
David S. Miller | 76 | 1.54% | 7 | 8.24% |
Derek Atkins | 72 | 1.46% | 1 | 1.18% |
James Morris | 64 | 1.30% | 2 | 2.35% |
Patrick McHardy | 45 | 0.91% | 3 | 3.53% |
Benjamin Poirier | 43 | 0.87% | 1 | 1.18% |
Joe Perches | 24 | 0.49% | 3 | 3.53% |
Andreas Gruenbacher | 23 | 0.47% | 1 | 1.18% |
Hideaki Yoshifuji / 吉藤英明 | 22 | 0.45% | 2 | 2.35% |
Arnaldo Carvalho de Melo | 19 | 0.39% | 5 | 5.88% |
Mathias Krause | 18 | 0.36% | 2 | 2.35% |
Alexey Dobriyan | 17 | 0.34% | 2 | 2.35% |
Li RongQing | 16 | 0.32% | 1 | 1.18% |
Diego Beltrami | 12 | 0.24% | 1 | 1.18% |
Thomas Graf | 10 | 0.20% | 2 | 2.35% |
Masahide Nakamura | 9 | 0.18% | 2 | 2.35% |
Joakim Koskela | 8 | 0.16% | 1 | 1.18% |
Eric Dumazet | 5 | 0.10% | 2 | 2.35% |
Tom Lendacky | 5 | 0.10% | 1 | 1.18% |
Rusty Russell | 5 | 0.10% | 1 | 1.18% |
Kazunori Miyazawa | 4 | 0.08% | 1 | 1.18% |
Jamal Hadi Salim | 4 | 0.08% | 1 | 1.18% |
Krishna Kumar | 2 | 0.04% | 1 | 1.18% |
Thomas Schlichter | 1 | 0.02% | 1 | 1.18% |
Wei Yongjun | 1 | 0.02% | 1 | 1.18% |
Andi Kleen | 1 | 0.02% | 1 | 1.18% |
Al Viro | 1 | 0.02% | 1 | 1.18% |
Adrian Bunk | 1 | 0.02% | 1 | 1.18% |
Ian Morris | 1 | 0.02% | 1 | 1.18% |
Total | 4932 | 100.00% | 85 | 100.00% |
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