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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next

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Steffen Klassert says:

====================
pull request (net-next): ipsec-next 2022-01-06

1) Fix some clang_analyzer warnings about never read variables.
   From luo penghao.

2) Check for pols[0] only once in xfrm_expand_policies().
   From Jean Sacren.

3) The SA curlft.use_time was updated only on SA cration time.
   Update whenever the SA is used. From Antony Antony

4) Add support for SM3 secure hash.
   From Xu Jia.

5) Add support for SM4 symmetric cipher algorithm.
   From Xu Jia.

6) Add a rate limit for SA mapping change messages.
   From Antony Antony.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2022-01-06 11:54:20 +00:00
commit d093d17c95
11 changed files with 96 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/net/xfrm.h
View File

@ -201,6 +201,11 @@ struct xfrm_state {
struct xfrm_algo_aead *aead;
const char *geniv;
/* mapping change rate limiting */
__be16 new_mapping_sport;
u32 new_mapping; /* seconds */
u32 mapping_maxage; /* seconds for input SA */
/* Data for encapsulator */
struct xfrm_encap_tmpl *encap;
struct sock __rcu *encap_sk;

2
include/uapi/linux/pfkeyv2.h
View File

@ -309,6 +309,7 @@ struct sadb_x_filter {
#define SADB_X_AALG_SHA2_512HMAC 7
#define SADB_X_AALG_RIPEMD160HMAC 8
#define SADB_X_AALG_AES_XCBC_MAC 9
#define SADB_X_AALG_SM3_256HMAC 10
#define SADB_X_AALG_NULL 251 /* kame */
#define SADB_AALG_MAX 251
@ -329,6 +330,7 @@ struct sadb_x_filter {
#define SADB_X_EALG_AES_GCM_ICV16 20
#define SADB_X_EALG_CAMELLIACBC 22
#define SADB_X_EALG_NULL_AES_GMAC 23
#define SADB_X_EALG_SM4CBC 24
#define SADB_EALG_MAX 253 /* last EALG */
/* private allocations should use 249-255 (RFC2407) */
#define SADB_X_EALG_SERPENTCBC 252 /* draft-ietf-ipsec-ciph-aes-cbc-00 */

1
include/uapi/linux/xfrm.h
View File

@ -313,6 +313,7 @@ enum xfrm_attr_type_t {
XFRMA_SET_MARK, /* __u32 */
XFRMA_SET_MARK_MASK, /* __u32 */
XFRMA_IF_ID, /* __u32 */
XFRMA_MTIMER_THRESH, /* __u32 in seconds for input SA */
__XFRMA_MAX
#define XFRMA_OUTPUT_MARK XFRMA_SET_MARK /* Compatibility */

3
net/ipv6/esp6.c
View File

@ -114,7 +114,6 @@ static inline struct scatterlist *esp_req_sg(struct crypto_aead *aead,
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;
@ -122,7 +121,7 @@ static void esp_ssg_unref(struct xfrm_state *x, void *tmp)
struct scatterlist *sg;
if (x->props.flags & XFRM_STATE_ESN)
extralen += sizeof(*extra);
extralen += sizeof(struct esp_output_extra);
iv = esp_tmp_iv(aead, tmp, extralen);
req = esp_tmp_req(aead, iv);

41
net/xfrm/xfrm_algo.c
View File

@ -341,6 +341,26 @@ static struct xfrm_algo_desc aalg_list[] = {
.pfkey_supported = 0,
},
{
.name = "hmac(sm3)",
.compat = "sm3",
.uinfo = {
.auth = {
.icv_truncbits = 256,
.icv_fullbits = 256,
}
},
.pfkey_supported = 1,
.desc = {
.sadb_alg_id = SADB_X_AALG_SM3_256HMAC,
.sadb_alg_ivlen = 0,
.sadb_alg_minbits = 256,
.sadb_alg_maxbits = 256
}
},
};
static struct xfrm_algo_desc ealg_list[] = {
@ -552,6 +572,27 @@ static struct xfrm_algo_desc ealg_list[] = {
.sadb_alg_maxbits = 288
}
},
{
.name = "cbc(sm4)",
.compat = "sm4",
.uinfo = {
.encr = {
.geniv = "echainiv",
.blockbits = 128,
.defkeybits = 128,
}
},
.pfkey_supported = 1,
.desc = {
.sadb_alg_id = SADB_X_EALG_SM4CBC,
.sadb_alg_ivlen = 16,
.sadb_alg_minbits = 128,
.sadb_alg_maxbits = 256
}
},
};
static struct xfrm_algo_desc calg_list[] = {

6
net/xfrm/xfrm_compat.c
View File

@ -127,6 +127,7 @@ static const struct nla_policy compat_policy[XFRMA_MAX+1] = {
[XFRMA_SET_MARK] = { .type = NLA_U32 },
[XFRMA_SET_MARK_MASK] = { .type = NLA_U32 },
[XFRMA_IF_ID] = { .type = NLA_U32 },
[XFRMA_MTIMER_THRESH] = { .type = NLA_U32 },
};
static struct nlmsghdr *xfrm_nlmsg_put_compat(struct sk_buff *skb,
@ -274,9 +275,10 @@ static int xfrm_xlate64_attr(struct sk_buff *dst, const struct nlattr *src)
case XFRMA_SET_MARK:
case XFRMA_SET_MARK_MASK:
case XFRMA_IF_ID:
case XFRMA_MTIMER_THRESH:
return xfrm_nla_cpy(dst, src, nla_len(src));
default:
BUILD_BUG_ON(XFRMA_MAX != XFRMA_IF_ID);
BUILD_BUG_ON(XFRMA_MAX != XFRMA_MTIMER_THRESH);
pr_warn_once("unsupported nla_type %d\n", src->nla_type);
return -EOPNOTSUPP;
}
@ -431,7 +433,7 @@ static int xfrm_xlate32_attr(void *dst, const struct nlattr *nla,
int err;
if (type > XFRMA_MAX) {
BUILD_BUG_ON(XFRMA_MAX != XFRMA_IF_ID);
BUILD_BUG_ON(XFRMA_MAX != XFRMA_MTIMER_THRESH);
NL_SET_ERR_MSG(extack, "Bad attribute");
return -EOPNOTSUPP;
}

1
net/xfrm/xfrm_input.c
View File

@ -669,6 +669,7 @@ resume:
x->curlft.bytes += skb->len;
x->curlft.packets++;
x->curlft.use_time = ktime_get_real_seconds();
spin_unlock(&x->lock);

1
net/xfrm/xfrm_output.c
View File

@ -533,6 +533,7 @@ static int xfrm_output_one(struct sk_buff *skb, int err)
x->curlft.bytes += skb->len;
x->curlft.packets++;
x->curlft.use_time = ktime_get_real_seconds();
spin_unlock_bh(&x->lock);

3
net/xfrm/xfrm_policy.c
View File

@ -2680,7 +2680,7 @@ static int xfrm_expand_policies(const struct flowi *fl, u16 family,
*num_xfrms = pols[0]->xfrm_nr;
#ifdef CONFIG_XFRM_SUB_POLICY
if (pols[0] && pols[0]->action == XFRM_POLICY_ALLOW &&
if (pols[0]->action == XFRM_POLICY_ALLOW &&
pols[0]->type != XFRM_POLICY_TYPE_MAIN) {
pols[1] = xfrm_policy_lookup_bytype(xp_net(pols[0]),
XFRM_POLICY_TYPE_MAIN,
@ -3392,7 +3392,6 @@ decode_session6(struct sk_buff *skb, struct flowi *fl, bool reverse)
case NEXTHDR_DEST:
offset += ipv6_optlen(exthdr);
nexthdr = exthdr->nexthdr;
exthdr = (struct ipv6_opt_hdr *)(nh + offset);
break;
case IPPROTO_UDP:
case IPPROTO_UDPLITE:

23
net/xfrm/xfrm_state.c
View File

@ -1594,6 +1594,9 @@ static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig,
x->km.seq = orig->km.seq;
x->replay = orig->replay;
x->preplay = orig->preplay;
x->mapping_maxage = orig->mapping_maxage;
x->new_mapping = 0;
x->new_mapping_sport = 0;
return x;
@ -2243,7 +2246,7 @@ int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
}
EXPORT_SYMBOL(km_query);
int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
static int __km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
{
int err = -EINVAL;
struct xfrm_mgr *km;
@ -2258,6 +2261,24 @@ int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
rcu_read_unlock();
return err;
}
int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
{
int ret = 0;
if (x->mapping_maxage) {
if ((jiffies / HZ - x->new_mapping) > x->mapping_maxage ||
x->new_mapping_sport != sport) {
x->new_mapping_sport = sport;
x->new_mapping = jiffies / HZ;
ret = __km_new_mapping(x, ipaddr, sport);
}
} else {
ret = __km_new_mapping(x, ipaddr, sport);
}
return ret;
}
EXPORT_SYMBOL(km_new_mapping);
void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid)

18
net/xfrm/xfrm_user.c
View File

@ -283,6 +283,10 @@ static int verify_newsa_info(struct xfrm_usersa_info *p,
err = 0;
if (attrs[XFRMA_MTIMER_THRESH])
if (!attrs[XFRMA_ENCAP])
err = -EINVAL;
out:
return err;
}
@ -522,6 +526,7 @@ static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
struct nlattr *mt = attrs[XFRMA_MTIMER_THRESH];
if (re) {
struct xfrm_replay_state_esn *replay_esn;
@ -553,6 +558,9 @@ static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
if (rt)
x->replay_maxdiff = nla_get_u32(rt);
if (mt)
x->mapping_maxage = nla_get_u32(mt);
}
static void xfrm_smark_init(struct nlattr **attrs, struct xfrm_mark *m)
@ -1025,8 +1033,13 @@ static int copy_to_user_state_extra(struct xfrm_state *x,
if (ret)
goto out;
}
if (x->security)
if (x->security) {
ret = copy_sec_ctx(x->security, skb);
if (ret)
goto out;
}
if (x->mapping_maxage)
ret = nla_put_u32(skb, XFRMA_MTIMER_THRESH, x->mapping_maxage);
out:
return ret;
}
@ -3070,6 +3083,9 @@ static inline unsigned int xfrm_sa_len(struct xfrm_state *x)
/* Must count x->lastused as it may become non-zero behind our back. */
l += nla_total_size_64bit(sizeof(u64));
if (x->mapping_maxage)
l += nla_total_size(sizeof(x->mapping_maxage));
return l;
}