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ipsec: include high order bytes of ESN in packet length

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When esn is used then high-order 32 bits are included in ICV
calculation however are not transmitted. Update packet length
to be consistent with auth data offset and length before crypto
operation. High-order 32 bits of esn will be removed from packet
length in crypto post processing.

Signed-off-by: Lukasz Bartosik <lbartosik@marvell.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
Acked-by: Akhil Goyal <akhil.goyal@nxp.com>
This commit is contained in:
Lukasz Bartosik 2019-06-05 17:31:27 +02:00 committed by Akhil Goyal
parent e95291f019
commit 8734e669fc
4 changed files with 76 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

60
lib/librte_ipsec/esp_inb.c
View File

@ -16,7 +16,8 @@
#include "pad.h"
typedef uint16_t (*esp_inb_process_t)(const struct rte_ipsec_sa *sa,
struct rte_mbuf *mb[], uint32_t sqn[], uint32_t dr[], uint16_t num);
struct rte_mbuf *mb[], uint32_t sqn[], uint32_t dr[], uint16_t num,
uint8_t sqh_len);
/*
* helper function to fill crypto_sym op for cipher+auth algorithms.
@ -228,6 +229,15 @@ inb_pkt_prepare(const struct rte_ipsec_sa *sa, const struct replay_sqn *rsn,
icv->va = rte_pktmbuf_mtod_offset(ml, void *, icv_ofs);
icv->pa = rte_pktmbuf_iova_offset(ml, icv_ofs);
/*
* if esn is used then high-order 32 bits are also used in ICV
* calculation but are not transmitted, update packet length
* to be consistent with auth data length and offset, this will
* be subtracted from packet length in post crypto processing
*/
mb->pkt_len += sa->sqh_len;
ml->data_len += sa->sqh_len;
inb_pkt_xprepare(sa, sqn, icv);
return plen;
}
@ -443,20 +453,23 @@ tun_process_step3(struct rte_mbuf *mb, uint64_t txof_msk, uint64_t txof_val)
mb->ol_flags &= ~PKT_RX_SEC_OFFLOAD;
}
/*
* *process* function for tunnel packets
*/
static inline uint16_t
tun_process(const struct rte_ipsec_sa *sa, struct rte_mbuf *mb[],
uint32_t sqn[], uint32_t dr[], uint16_t num)
uint32_t sqn[], uint32_t dr[], uint16_t num, uint8_t sqh_len)
{
uint32_t adj, i, k, tl;
uint32_t hl[num], to[num];
struct esp_tail espt[num];
struct rte_mbuf *ml[num];
const uint32_t tlen = sa->icv_len + sizeof(espt[0]);
/*
* remove icv, esp trailer and high-order
* 32 bits of esn from packet length
*/
const uint32_t tlen = sa->icv_len + sizeof(espt[0]) + sqh_len;
const uint32_t cofs = sa->ctp.cipher.offset;
/*
@ -496,7 +509,7 @@ tun_process(const struct rte_ipsec_sa *sa, struct rte_mbuf *mb[],
*/
static inline uint16_t
trs_process(const struct rte_ipsec_sa *sa, struct rte_mbuf *mb[],
uint32_t sqn[], uint32_t dr[], uint16_t num)
uint32_t sqn[], uint32_t dr[], uint16_t num, uint8_t sqh_len)
{
char *np;
uint32_t i, k, l2, tl;
@ -504,7 +517,11 @@ trs_process(const struct rte_ipsec_sa *sa, struct rte_mbuf *mb[],
struct esp_tail espt[num];
struct rte_mbuf *ml[num];
const uint32_t tlen = sa->icv_len + sizeof(espt[0]);
/*
* remove icv, esp trailer and high-order
* 32 bits of esn from packet length
*/
const uint32_t tlen = sa->icv_len + sizeof(espt[0]) + sqh_len;
const uint32_t cofs = sa->ctp.cipher.offset;
/*
@ -572,18 +589,15 @@ esp_inb_rsn_update(struct rte_ipsec_sa *sa, const uint32_t sqn[],
* process group of ESP inbound packets.
*/
static inline uint16_t
esp_inb_pkt_process(const struct rte_ipsec_session *ss,
struct rte_mbuf *mb[], uint16_t num, esp_inb_process_t process)
esp_inb_pkt_process(struct rte_ipsec_sa *sa, struct rte_mbuf *mb[],
uint16_t num, uint8_t sqh_len, esp_inb_process_t process)
{
uint32_t k, n;
struct rte_ipsec_sa *sa;
uint32_t sqn[num];
uint32_t dr[num];
sa = ss->sa;
/* process packets, extract seq numbers */
k = process(sa, mb, sqn, dr, num);
k = process(sa, mb, sqn, dr, num, sqh_len);
/* handle unprocessed mbufs */
if (k != num && k != 0)
@ -609,7 +623,16 @@ uint16_t
esp_inb_tun_pkt_process(const struct rte_ipsec_session *ss,
struct rte_mbuf *mb[], uint16_t num)
{
return esp_inb_pkt_process(ss, mb, num, tun_process);
struct rte_ipsec_sa *sa = ss->sa;
return esp_inb_pkt_process(sa, mb, num, sa->sqh_len, tun_process);
}
uint16_t
inline_inb_tun_pkt_process(const struct rte_ipsec_session *ss,
struct rte_mbuf *mb[], uint16_t num)
{
return esp_inb_pkt_process(ss->sa, mb, num, 0, tun_process);
}
/*
@ -619,5 +642,14 @@ uint16_t
esp_inb_trs_pkt_process(const struct rte_ipsec_session *ss,
struct rte_mbuf *mb[], uint16_t num)
{
return esp_inb_pkt_process(ss, mb, num, trs_process);
struct rte_ipsec_sa *sa = ss->sa;
return esp_inb_pkt_process(sa, mb, num, sa->sqh_len, trs_process);
}
uint16_t
inline_inb_trs_pkt_process(const struct rte_ipsec_session *ss,
struct rte_mbuf *mb[], uint16_t num)
{
return esp_inb_pkt_process(ss->sa, mb, num, 0, trs_process);
}

36
lib/librte_ipsec/esp_outb.c
View File

@ -104,7 +104,7 @@ outb_cop_prepare(struct rte_crypto_op *cop,
static inline int32_t
outb_tun_pkt_prepare(struct rte_ipsec_sa *sa, rte_be64_t sqc,
const uint64_t ivp[IPSEC_MAX_IV_QWORD], struct rte_mbuf *mb,
union sym_op_data *icv)
union sym_op_data *icv, uint8_t sqh_len)
{
uint32_t clen, hlen, l2len, pdlen, pdofs, plen, tlen;
struct rte_mbuf *ml;
@ -126,11 +126,11 @@ outb_tun_pkt_prepare(struct rte_ipsec_sa *sa, rte_be64_t sqc,
/* pad length + esp tail */
pdlen = clen - plen;
tlen = pdlen + sa->icv_len;
tlen = pdlen + sa->icv_len + sqh_len;
/* do append and prepend */
ml = rte_pktmbuf_lastseg(mb);
if (tlen + sa->sqh_len + sa->aad_len > rte_pktmbuf_tailroom(ml))
if (tlen + sa->aad_len > rte_pktmbuf_tailroom(ml))
return -ENOSPC;
/* prepend header */
@ -152,8 +152,8 @@ outb_tun_pkt_prepare(struct rte_ipsec_sa *sa, rte_be64_t sqc,
rte_memcpy(ph, sa->hdr, sa->hdr_len);
/* update original and new ip header fields */
update_tun_l3hdr(sa, ph + sa->hdr_l3_off, mb->pkt_len, sa->hdr_l3_off,
sqn_low16(sqc));
update_tun_l3hdr(sa, ph + sa->hdr_l3_off, mb->pkt_len - sqh_len,
sa->hdr_l3_off, sqn_low16(sqc));
/* update spi, seqn and iv */
esph = (struct rte_esp_hdr *)(ph + sa->hdr_len);
@ -242,8 +242,8 @@ esp_outb_tun_prepare(const struct rte_ipsec_session *ss, struct rte_mbuf *mb[],
gen_iv(iv, sqc);
/* try to update the packet itself */
rc = outb_tun_pkt_prepare(sa, sqc, iv, mb[i], &icv);
rc = outb_tun_pkt_prepare(sa, sqc, iv, mb[i], &icv,
sa->sqh_len);
/* success, setup crypto op */
if (rc >= 0) {
outb_pkt_xprepare(sa, sqc, &icv);
@ -270,7 +270,8 @@ esp_outb_tun_prepare(const struct rte_ipsec_session *ss, struct rte_mbuf *mb[],
static inline int32_t
outb_trs_pkt_prepare(struct rte_ipsec_sa *sa, rte_be64_t sqc,
const uint64_t ivp[IPSEC_MAX_IV_QWORD], struct rte_mbuf *mb,
uint32_t l2len, uint32_t l3len, union sym_op_data *icv)
uint32_t l2len, uint32_t l3len, union sym_op_data *icv,
uint8_t sqh_len)
{
uint8_t np;
uint32_t clen, hlen, pdlen, pdofs, plen, tlen, uhlen;
@ -292,11 +293,11 @@ outb_trs_pkt_prepare(struct rte_ipsec_sa *sa, rte_be64_t sqc,
/* pad length + esp tail */
pdlen = clen - plen;
tlen = pdlen + sa->icv_len;
tlen = pdlen + sa->icv_len + sqh_len;
/* do append and insert */
ml = rte_pktmbuf_lastseg(mb);
if (tlen + sa->sqh_len + sa->aad_len > rte_pktmbuf_tailroom(ml))
if (tlen + sa->aad_len > rte_pktmbuf_tailroom(ml))
return -ENOSPC;
/* prepend space for ESP header */
@ -314,8 +315,8 @@ outb_trs_pkt_prepare(struct rte_ipsec_sa *sa, rte_be64_t sqc,
insert_esph(ph, ph + hlen, uhlen);
/* update ip header fields */
np = update_trs_l3hdr(sa, ph + l2len, mb->pkt_len, l2len, l3len,
IPPROTO_ESP);
np = update_trs_l3hdr(sa, ph + l2len, mb->pkt_len - sqh_len, l2len,
l3len, IPPROTO_ESP);
/* update spi, seqn and iv */
esph = (struct rte_esp_hdr *)(ph + uhlen);
@ -380,8 +381,8 @@ esp_outb_trs_prepare(const struct rte_ipsec_session *ss, struct rte_mbuf *mb[],
gen_iv(iv, sqc);
/* try to update the packet itself */
rc = outb_trs_pkt_prepare(sa, sqc, iv, mb[i], l2, l3, &icv);
rc = outb_trs_pkt_prepare(sa, sqc, iv, mb[i], l2, l3, &icv,
sa->sqh_len);
/* success, setup crypto op */
if (rc >= 0) {
outb_pkt_xprepare(sa, sqc, &icv);
@ -425,6 +426,9 @@ esp_outb_sqh_process(const struct rte_ipsec_session *ss, struct rte_mbuf *mb[],
for (i = 0; i != num; i++) {
if ((mb[i]->ol_flags & PKT_RX_SEC_OFFLOAD_FAILED) == 0) {
ml = rte_pktmbuf_lastseg(mb[i]);
/* remove high-order 32 bits of esn from packet len */
mb[i]->pkt_len -= sa->sqh_len;
ml->data_len -= sa->sqh_len;
icv = rte_pktmbuf_mtod_offset(ml, void *,
ml->data_len - icv_len);
remove_sqh(icv, icv_len);
@ -494,7 +498,7 @@ inline_outb_tun_pkt_process(const struct rte_ipsec_session *ss,
gen_iv(iv, sqc);
/* try to update the packet itself */
rc = outb_tun_pkt_prepare(sa, sqc, iv, mb[i], &icv);
rc = outb_tun_pkt_prepare(sa, sqc, iv, mb[i], &icv, 0);
k += (rc >= 0);
@ -548,7 +552,7 @@ inline_outb_trs_pkt_process(const struct rte_ipsec_session *ss,
/* try to update the packet itself */
rc = outb_trs_pkt_prepare(sa, sqc, iv, mb[i],
l2, l3, &icv);
l2, l3, &icv, 0);
k += (rc >= 0);

4
lib/librte_ipsec/sa.c
View File

@ -612,10 +612,10 @@ inline_crypto_pkt_func_select(const struct rte_ipsec_sa *sa,
switch (sa->type & msk) {
case (RTE_IPSEC_SATP_DIR_IB | RTE_IPSEC_SATP_MODE_TUNLV4):
case (RTE_IPSEC_SATP_DIR_IB | RTE_IPSEC_SATP_MODE_TUNLV6):
pf->process = esp_inb_tun_pkt_process;
pf->process = inline_inb_tun_pkt_process;
break;
case (RTE_IPSEC_SATP_DIR_IB | RTE_IPSEC_SATP_MODE_TRANS):
pf->process = esp_inb_trs_pkt_process;
pf->process = inline_inb_trs_pkt_process;
break;
case (RTE_IPSEC_SATP_DIR_OB | RTE_IPSEC_SATP_MODE_TUNLV4):
case (RTE_IPSEC_SATP_DIR_OB | RTE_IPSEC_SATP_MODE_TUNLV6):

8
lib/librte_ipsec/sa.h
View File

@ -142,10 +142,18 @@ uint16_t
esp_inb_tun_pkt_process(const struct rte_ipsec_session *ss,
struct rte_mbuf *mb[], uint16_t num);
uint16_t
inline_inb_tun_pkt_process(const struct rte_ipsec_session *ss,
struct rte_mbuf *mb[], uint16_t num);
uint16_t
esp_inb_trs_pkt_process(const struct rte_ipsec_session *ss,
struct rte_mbuf *mb[], uint16_t num);
uint16_t
inline_inb_trs_pkt_process(const struct rte_ipsec_session *ss,
struct rte_mbuf *mb[], uint16_t num);
/* outbound processing */
uint16_t