cregit-Linux how code gets into the kernel

Release 4.11 net/ipv4/esp4.c

Directory: net/ipv4

#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

PersonTokensPropCommitsCommitProp
Herbert Xu8679.63%555.56%
Alexey Kuznetsov1513.89%111.11%
Steffen Klassert54.63%111.11%
Arnaldo Carvalho de Melo10.93%111.11%
James Morris10.93%111.11%
Total108100.00%9100.00%


static inline void *esp_tmp_extra(void *tmp) { return PTR_ALIGN(tmp, __alignof__(struct esp_output_extra)); }

Contributors

PersonTokensPropCommitsCommitProp
Steffen Klassert2083.33%150.00%
Herbert Xu416.67%150.00%
Total24100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
Herbert Xu4083.33%240.00%
Steffen Klassert48.33%120.00%
Arnaldo Carvalho de Melo24.17%120.00%
Alexey Kuznetsov24.17%120.00%
Total48100.00%5100.00%


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

PersonTokensPropCommitsCommitProp
Herbert Xu52100.00%1100.00%
Total52100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
Herbert Xu48100.00%1100.00%
Total48100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
Steffen Klassert137100.00%1100.00%
Total137100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
Herbert Xu3952.70%266.67%
Steffen Klassert3547.30%133.33%
Total74100.00%3100.00%

/* 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

PersonTokensPropCommitsCommitProp
Herbert Xu67100.00%3100.00%
Total67100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
Herbert Xu51100.00%3100.00%
Total51100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
Steffen Klassert10686.18%133.33%
Herbert Xu1713.82%266.67%
Total123100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
Steffen Klassert35100.00%1100.00%
Total35100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
Steffen Klassert94100.00%1100.00%
Total94100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
Steffen Klassert91962.01%418.18%
Herbert Xu41127.73%1045.45%
Martin Willi835.60%14.55%
Alexey Kuznetsov372.50%14.55%
Derek Atkins271.82%14.55%
David S. Miller10.07%14.55%
James Morris10.07%14.55%
Wei Yongjun10.07%14.55%
Al Viro10.07%14.55%
Mathias Krause10.07%14.55%
Total1482100.00%22100.00%


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

PersonTokensPropCommitsCommitProp
Herbert Xu24472.62%952.94%
Alexey Kuznetsov6519.35%15.88%
Li RongQing164.76%15.88%
Hideaki Yoshifuji / 吉藤英明30.89%15.88%
Derek Atkins20.60%15.88%
David S. Miller20.60%15.88%
Mathias Krause20.60%15.88%
Eric Dumazet10.30%15.88%
Patrick McHardy10.30%15.88%
Total336100.00%17100.00%


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

PersonTokensPropCommitsCommitProp
Herbert Xu35100.00%1100.00%
Total35100.00%1100.00%


static void esp_input_restore_header(struct sk_buff *skb) { esp_restore_header(skb, 0); __skb_pull(skb, 4); }

Contributors

PersonTokensPropCommitsCommitProp
Steffen Klassert1560.00%150.00%
Herbert Xu1040.00%150.00%
Total25100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
Steffen Klassert8789.69%133.33%
Herbert Xu1010.31%266.67%
Total97100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
Herbert Xu3188.57%250.00%
David S. Miller38.57%125.00%
Alexey Kuznetsov12.86%125.00%
Total35100.00%4100.00%

/* * 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

PersonTokensPropCommitsCommitProp
Herbert Xu23151.91%741.18%
Steffen Klassert18140.67%211.76%
Alexey Kuznetsov153.37%15.88%
Arnaldo Carvalho de Melo71.57%211.76%
Thomas Graf71.57%211.76%
Mathias Krause20.45%15.88%
David S. Miller10.22%15.88%
Derek Atkins10.22%15.88%
Total445100.00%17100.00%


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

PersonTokensPropCommitsCommitProp
Benjamin Poirier4339.81%112.50%
Alexey Kuznetsov3936.11%112.50%
Diego Beltrami1211.11%112.50%
Herbert Xu76.48%225.00%
Patrick McHardy43.70%112.50%
Mathias Krause32.78%225.00%
Total108100.00%8100.00%


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

PersonTokensPropCommitsCommitProp
Alexey Kuznetsov9347.45%19.09%
David S. Miller5427.55%218.18%
Alexey Dobriyan147.14%218.18%
Steffen Klassert136.63%19.09%
Hideaki Yoshifuji / 吉藤英明84.08%19.09%
Arnaldo Carvalho de Melo63.06%19.09%
Jamal Hadi Salim42.04%19.09%
Eric Dumazet31.53%19.09%
Patrick McHardy10.51%19.09%
Total196100.00%11100.00%


static void esp_destroy(struct xfrm_state *x) { struct crypto_aead *aead = x->data; if (!aead) return; crypto_free_aead(aead); }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Kuznetsov1961.29%116.67%
Herbert Xu516.13%233.33%
David S. Miller39.68%116.67%
Mathias Krause39.68%116.67%
Patrick McHardy13.23%116.67%
Total31100.00%6100.00%


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

PersonTokensPropCommitsCommitProp
Herbert Xu13791.95%240.00%
Alexey Kuznetsov96.04%120.00%
Mathias Krause21.34%120.00%
Patrick McHardy10.67%120.00%
Total149100.00%5100.00%


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

PersonTokensPropCommitsCommitProp
Herbert Xu38068.47%738.89%
James Morris6211.17%15.56%
Steffen Klassert509.01%15.56%
Alexey Kuznetsov458.11%211.11%
David S. Miller71.26%15.56%
Martin Willi40.72%15.56%
Mathias Krause20.36%15.56%
Krishna Kumar20.36%15.56%
Ian Morris10.18%15.56%
Joe Perches10.18%15.56%
Andi Kleen10.18%15.56%
Total555100.00%18100.00%


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

PersonTokensPropCommitsCommitProp
Herbert Xu6930.26%423.53%
Derek Atkins3917.11%15.88%
Patrick McHardy3515.35%211.76%
Alexey Kuznetsov3314.47%211.76%
Andreas Gruenbacher2310.09%15.88%
Joakim Koskela83.51%15.88%
Tom Lendacky52.19%15.88%
Hideaki Yoshifuji / 吉藤英明52.19%15.88%
Kazunori Miyazawa41.75%15.88%
Mathias Krause31.32%15.88%
David S. Miller20.88%15.88%
Masahide Nakamura20.88%15.88%
Total228100.00%17100.00%


static int esp4_rcv_cb(struct sk_buff *skb, int err) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Steffen Klassert17100.00%1100.00%
Total17100.00%1100.00%

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

PersonTokensPropCommitsCommitProp
Alexey Kuznetsov5680.00%120.00%
Joe Perches811.43%120.00%
Hideaki Yoshifuji / 吉藤英明45.71%120.00%
Thomas Schlichter11.43%120.00%
Steffen Klassert11.43%120.00%
Total70100.00%5100.00%


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

PersonTokensPropCommitsCommitProp
Alexey Kuznetsov3676.60%125.00%
Joe Perches817.02%125.00%
Hideaki Yoshifuji / 吉藤英明24.26%125.00%
Steffen Klassert12.13%125.00%
Total47100.00%4100.00%

module_init(esp4_init); module_exit(esp4_fini); MODULE_LICENSE("GPL"); MODULE_ALIAS_XFRM_TYPE(AF_INET, XFRM_PROTO_ESP);

Overall Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu202641.08%2529.41%
Steffen Klassert173535.18%55.88%
Alexey Kuznetsov56211.39%44.71%
Martin Willi1002.03%22.35%
David S. Miller761.54%78.24%
Derek Atkins721.46%11.18%
James Morris641.30%22.35%
Patrick McHardy450.91%33.53%
Benjamin Poirier430.87%11.18%
Joe Perches240.49%33.53%
Andreas Gruenbacher230.47%11.18%
Hideaki Yoshifuji / 吉藤英明220.45%22.35%
Arnaldo Carvalho de Melo190.39%55.88%
Mathias Krause180.36%22.35%
Alexey Dobriyan170.34%22.35%
Li RongQing160.32%11.18%
Diego Beltrami120.24%11.18%
Thomas Graf100.20%22.35%
Masahide Nakamura90.18%22.35%
Joakim Koskela80.16%11.18%
Eric Dumazet50.10%22.35%
Tom Lendacky50.10%11.18%
Rusty Russell50.10%11.18%
Kazunori Miyazawa40.08%11.18%
Jamal Hadi Salim40.08%11.18%
Krishna Kumar20.04%11.18%
Thomas Schlichter10.02%11.18%
Wei Yongjun10.02%11.18%
Andi Kleen10.02%11.18%
Al Viro10.02%11.18%
Adrian Bunk10.02%11.18%
Ian Morris10.02%11.18%
Total4932100.00%85100.00%
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