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-rw-r--r--src/vnet/ipsec/ikev2_payload.c535
1 files changed, 535 insertions, 0 deletions
diff --git a/src/vnet/ipsec/ikev2_payload.c b/src/vnet/ipsec/ikev2_payload.c
new file mode 100644
index 00000000000..dd14812b550
--- /dev/null
+++ b/src/vnet/ipsec/ikev2_payload.c
@@ -0,0 +1,535 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <ctype.h>
+
+#include <vnet/vnet.h>
+#include <vnet/api_errno.h>
+#include <vnet/ip/ip.h>
+#include <vnet/interface.h>
+
+#include <vnet/ipsec/ipsec.h>
+#include <vnet/ipsec/ikev2.h>
+#include <vnet/ipsec/ikev2_priv.h>
+
+/* *INDENT-OFF* */
+typedef CLIB_PACKED (struct
+ {
+ u8 nextpayload;
+ u8 flags;
+ u16 length;
+ u8 protocol_id;
+ u8 spi_size;
+ u16 msg_type;
+ u8 payload[0];}) ike_notify_payload_header_t;
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+typedef CLIB_PACKED (struct
+ {
+ u8 ts_type;
+ u8 protocol_id;
+ u16 selector_len;
+ u16 start_port;
+ u16 end_port;
+ ip4_address_t start_addr;
+ ip4_address_t end_addr;}) ikev2_ts_payload_entry_t;
+/* *INDENT-OFF* */
+
+/* *INDENT-OFF* */
+typedef CLIB_PACKED (struct
+ {
+ u8 nextpayload;
+ u8 flags;
+ u16 length;
+ u8 num_ts;
+ u8 reserved[3];
+ ikev2_ts_payload_entry_t ts[0];})
+ ike_ts_payload_header_t;
+/* *INDENT-OFF* */
+
+/* *INDENT-OFF* */
+typedef CLIB_PACKED (struct {
+ u8 last_or_more;
+ u8 reserved;
+ u16 proposal_len;
+ u8 proposal_num;
+ u8 protocol_id;
+ u8 spi_size;
+ u8 num_transforms; u32 spi[0];
+}) ike_sa_proposal_data_t;
+/* *INDENT-OFF* */
+
+/* *INDENT-OFF* */
+typedef CLIB_PACKED (struct {
+ u8 last_or_more;
+ u8 reserved;
+ u16 transform_len;
+ u8 transform_type;
+ u8 reserved2;
+ u16 transform_id;
+ u8 attributes[0];
+}) ike_sa_transform_data_t;
+/* *INDENT-OFF* */
+
+/* *INDENT-OFF* */
+typedef CLIB_PACKED (struct {
+ u8 nextpayload;
+ u8 flags;
+ u16 length;
+ u8 protocol_id;
+ u8 spi_size;
+ u16 num_of_spi;
+ u32 spi[0];
+}) ike_delete_payload_header_t;
+/* *INDENT-OFF* */
+
+static ike_payload_header_t *
+ikev2_payload_add_hdr (ikev2_payload_chain_t * c, u8 payload_type, int len)
+{
+ ike_payload_header_t *hdr =
+ (ike_payload_header_t *) & c->data[c->last_hdr_off];
+ u8 *tmp;
+
+ if (c->data)
+ hdr->nextpayload = payload_type;
+ else
+ c->first_payload_type = payload_type;
+
+ c->last_hdr_off = vec_len (c->data);
+ vec_add2 (c->data, tmp, len);
+ hdr = (ike_payload_header_t *) tmp;
+ memset (hdr, 0, len);
+
+ hdr->length = clib_host_to_net_u16 (len);
+
+ return hdr;
+}
+
+static void
+ikev2_payload_add_data (ikev2_payload_chain_t * c, u8 * data)
+{
+ u16 len;
+ ike_payload_header_t *hdr;
+
+ vec_append (c->data, data);
+ hdr = (ike_payload_header_t *) & c->data[c->last_hdr_off];
+ len = clib_net_to_host_u16 (hdr->length);
+ hdr->length = clib_host_to_net_u16 (len + vec_len (data));
+}
+
+void
+ikev2_payload_add_notify (ikev2_payload_chain_t * c, u16 msg_type, u8 * data)
+{
+ ike_notify_payload_header_t *n;
+
+ n =
+ (ike_notify_payload_header_t *) ikev2_payload_add_hdr (c,
+ IKEV2_PAYLOAD_NOTIFY,
+ sizeof (*n));
+ n->msg_type = clib_host_to_net_u16 (msg_type);
+ ikev2_payload_add_data (c, data);
+}
+
+void
+ikev2_payload_add_sa (ikev2_payload_chain_t * c,
+ ikev2_sa_proposal_t * proposals)
+{
+ ike_payload_header_t *ph;
+ ike_sa_proposal_data_t *prop;
+ ike_sa_transform_data_t *tr;
+ ikev2_sa_proposal_t *p;
+ ikev2_sa_transform_t *t;
+
+ u8 *tmp;
+ u8 *pr_data = 0;
+ u8 *tr_data = 0;
+
+ ikev2_payload_add_hdr (c, IKEV2_PAYLOAD_SA, sizeof (*ph));
+
+ vec_foreach (p, proposals)
+ {
+ int spi_size = (p->protocol_id == IKEV2_PROTOCOL_ESP) ? 4 : 0;
+ pr_data = vec_new (u8, sizeof (ike_sa_proposal_data_t) + spi_size);
+ prop = (ike_sa_proposal_data_t *) pr_data;
+ prop->last_or_more = proposals - p + 1 < vec_len (proposals) ? 2 : 0;
+ prop->protocol_id = p->protocol_id;
+ prop->proposal_num = p->proposal_num;
+ prop->spi_size = spi_size;
+ prop->num_transforms = vec_len (p->transforms);
+
+ if (spi_size)
+ prop->spi[0] = clib_host_to_net_u32 (p->spi);
+
+ DBG_PLD ("proposal num %u protocol_id %u last_or_more %u spi_size %u%s%U",
+ prop->proposal_num, prop->protocol_id, prop->last_or_more,
+ prop->spi_size, prop->spi_size ? " spi_data " : "",
+ format_hex_bytes, prop->spi, prop->spi_size);
+
+ vec_foreach (t, p->transforms)
+ {
+ vec_add2 (tr_data, tmp, sizeof (*tr) + vec_len (t->attrs));
+ tr = (ike_sa_transform_data_t *) tmp;
+ tr->last_or_more =
+ ((t - p->transforms) + 1 < vec_len (p->transforms)) ? 3 : 0;
+ tr->transform_type = t->type;
+ tr->transform_id = clib_host_to_net_u16 (t->transform_id);
+ tr->transform_len =
+ clib_host_to_net_u16 (sizeof (*tr) + vec_len (t->attrs));
+
+ if (vec_len (t->attrs) > 0)
+ clib_memcpy (tr->attributes, t->attrs, vec_len (t->attrs));
+
+ DBG_PLD
+ ("transform type %U transform_id %u last_or_more %u attr_size %u%s%U",
+ format_ikev2_transform_type, tr->transform_type, t->transform_id,
+ tr->last_or_more, vec_len (t->attrs),
+ vec_len (t->attrs) ? " attrs " : "", format_hex_bytes,
+ tr->attributes, vec_len (t->attrs));
+ }
+
+ prop->proposal_len =
+ clib_host_to_net_u16 (vec_len (tr_data) + vec_len (pr_data));
+ ikev2_payload_add_data (c, pr_data);
+ ikev2_payload_add_data (c, tr_data);
+ vec_free (pr_data);
+ vec_free (tr_data);
+ }
+}
+
+void
+ikev2_payload_add_ke (ikev2_payload_chain_t * c, u16 dh_group, u8 * dh_data)
+{
+ ike_ke_payload_header_t *ke;
+ ke = (ike_ke_payload_header_t *) ikev2_payload_add_hdr (c, IKEV2_PAYLOAD_KE,
+ sizeof (*ke));
+
+ ke->dh_group = clib_host_to_net_u16 (dh_group);
+ ikev2_payload_add_data (c, dh_data);
+}
+
+void
+ikev2_payload_add_nonce (ikev2_payload_chain_t * c, u8 * nonce)
+{
+ ikev2_payload_add_hdr (c, IKEV2_PAYLOAD_NONCE,
+ sizeof (ike_payload_header_t));
+ ikev2_payload_add_data (c, nonce);
+}
+
+void
+ikev2_payload_add_id (ikev2_payload_chain_t * c, ikev2_id_t * id, u8 type)
+{
+ ike_id_payload_header_t *idp;
+ idp =
+ (ike_id_payload_header_t *) ikev2_payload_add_hdr (c, type,
+ sizeof (*idp));
+
+ idp->id_type = id->type;
+ ikev2_payload_add_data (c, id->data);
+}
+
+void
+ikev2_payload_add_delete (ikev2_payload_chain_t * c, ikev2_delete_t * d)
+{
+ ike_delete_payload_header_t *dp;
+ u16 num_of_spi = vec_len (d);
+ ikev2_delete_t *d2;
+ dp =
+ (ike_delete_payload_header_t *) ikev2_payload_add_hdr (c,
+ IKEV2_PAYLOAD_DELETE,
+ sizeof (*dp));
+
+ if (d[0].protocol_id == IKEV2_PROTOCOL_IKE)
+ {
+ dp->protocol_id = 1;
+ }
+ else
+ {
+ dp->protocol_id = d[0].protocol_id;
+ dp->spi_size = 4;
+ dp->num_of_spi = clib_host_to_net_u16 (num_of_spi);
+ vec_foreach (d2, d)
+ {
+ u8 *data = vec_new (u8, 4);
+ u32 spi = clib_host_to_net_u32 (d2->spi);
+ clib_memcpy (data, &spi, 4);
+ ikev2_payload_add_data (c, data);
+ vec_free (data);
+ }
+ }
+}
+
+void
+ikev2_payload_add_auth (ikev2_payload_chain_t * c, ikev2_auth_t * auth)
+{
+ ike_auth_payload_header_t *ap;
+ ap =
+ (ike_auth_payload_header_t *) ikev2_payload_add_hdr (c,
+ IKEV2_PAYLOAD_AUTH,
+ sizeof (*ap));
+
+ ap->auth_method = auth->method;
+ ikev2_payload_add_data (c, auth->data);
+}
+
+void
+ikev2_payload_add_ts (ikev2_payload_chain_t * c, ikev2_ts_t * ts, u8 type)
+{
+ ike_ts_payload_header_t *tsh;
+ ikev2_ts_t *ts2;
+ u8 *data = 0, *tmp;
+
+ tsh =
+ (ike_ts_payload_header_t *) ikev2_payload_add_hdr (c, type,
+ sizeof (*tsh));
+ tsh->num_ts = vec_len (ts);
+
+ vec_foreach (ts2, ts)
+ {
+ ASSERT (ts2->ts_type == 7); /*TS_IPV4_ADDR_RANGE */
+ ikev2_ts_payload_entry_t *entry;
+ vec_add2 (data, tmp, sizeof (*entry));
+ entry = (ikev2_ts_payload_entry_t *) tmp;
+ entry->ts_type = ts2->ts_type;
+ entry->protocol_id = ts2->protocol_id;
+ entry->selector_len = clib_host_to_net_u16 (16);
+ entry->start_port = clib_host_to_net_u16 (ts2->start_port);
+ entry->end_port = clib_host_to_net_u16 (ts2->end_port);
+ entry->start_addr.as_u32 = ts2->start_addr.as_u32;
+ entry->end_addr.as_u32 = ts2->end_addr.as_u32;
+ }
+
+ ikev2_payload_add_data (c, data);
+ vec_free (data);
+}
+
+void
+ikev2_payload_chain_add_padding (ikev2_payload_chain_t * c, int bs)
+{
+ u8 *tmp __attribute__ ((unused));
+ u8 pad_len = (vec_len (c->data) / bs + 1) * bs - vec_len (c->data);
+ vec_add2 (c->data, tmp, pad_len);
+ c->data[vec_len (c->data) - 1] = pad_len - 1;
+}
+
+ikev2_sa_proposal_t *
+ikev2_parse_sa_payload (ike_payload_header_t * ikep)
+{
+ ikev2_sa_proposal_t *v = 0;
+ ikev2_sa_proposal_t *proposal;
+ ikev2_sa_transform_t *transform;
+
+ u32 plen = clib_net_to_host_u16 (ikep->length);
+
+ ike_sa_proposal_data_t *sap;
+ int proposal_ptr = 0;
+
+ do
+ {
+ sap = (ike_sa_proposal_data_t *) & ikep->payload[proposal_ptr];
+ int i;
+ int transform_ptr;
+
+ DBG_PLD ("proposal num %u len %u last_or_more %u id %u "
+ "spi_size %u num_transforms %u",
+ sap->proposal_num, clib_net_to_host_u16 (sap->proposal_len),
+ sap->last_or_more, sap->protocol_id, sap->spi_size,
+ sap->num_transforms);
+
+ /* IKE proposal should not have SPI */
+ if (sap->protocol_id == IKEV2_PROTOCOL_IKE && sap->spi_size != 0)
+ goto data_corrupted;
+
+ /* IKE proposal should not have SPI */
+ if (sap->protocol_id == IKEV2_PROTOCOL_ESP && sap->spi_size != 4)
+ goto data_corrupted;
+
+ transform_ptr = proposal_ptr + sizeof (*sap) + sap->spi_size;
+
+ vec_add2 (v, proposal, 1);
+ proposal->proposal_num = sap->proposal_num;
+ proposal->protocol_id = sap->protocol_id;
+
+ if (sap->spi_size == 4)
+ {
+ proposal->spi = clib_net_to_host_u32 (sap->spi[0]);
+ }
+
+ for (i = 0; i < sap->num_transforms; i++)
+ {
+ ike_sa_transform_data_t *tr =
+ (ike_sa_transform_data_t *) & ikep->payload[transform_ptr];
+ u16 tlen = clib_net_to_host_u16 (tr->transform_len);
+
+ if (tlen < sizeof (*tr))
+ goto data_corrupted;
+
+ vec_add2 (proposal->transforms, transform, 1);
+
+ transform->type = tr->transform_type;
+ transform->transform_id = clib_net_to_host_u16 (tr->transform_id);
+ if (tlen > sizeof (*tr))
+ vec_add (transform->attrs, tr->attributes, tlen - sizeof (*tr));
+
+ DBG_PLD
+ ("transform num %u len %u last_or_more %u type %U id %u%s%U", i,
+ tlen, tr->last_or_more, format_ikev2_sa_transform, transform,
+ clib_net_to_host_u16 (tr->transform_id),
+ tlen > sizeof (*tr) ? " attrs " : "", format_hex_bytes,
+ tr->attributes, tlen - sizeof (*tr));
+
+ transform_ptr += tlen;
+ }
+
+ proposal_ptr += clib_net_to_host_u16 (sap->proposal_len);
+ }
+ while (proposal_ptr < (plen - sizeof (*ikep)) && sap->last_or_more == 2);
+
+ /* data validation */
+ if (proposal_ptr != (plen - sizeof (*ikep)) || sap->last_or_more)
+ goto data_corrupted;
+
+ return v;
+
+data_corrupted:
+ DBG_PLD ("SA payload data corrupted");
+ ikev2_sa_free_proposal_vector (&v);
+ return 0;
+}
+
+ikev2_ts_t *
+ikev2_parse_ts_payload (ike_payload_header_t * ikep)
+{
+ ike_ts_payload_header_t *tsp = (ike_ts_payload_header_t *) ikep;
+ ikev2_ts_t *r = 0, *ts;
+ u8 i;
+
+ for (i = 0; i < tsp->num_ts; i++)
+ {
+ if (tsp->ts[i].ts_type != 7) /* TS_IPV4_ADDR_RANGE */
+ {
+ DBG_PLD ("unsupported TS type received (%u)", tsp->ts[i].ts_type);
+ continue;
+ }
+
+ vec_add2 (r, ts, 1);
+ ts->ts_type = tsp->ts[i].ts_type;
+ ts->protocol_id = tsp->ts[i].protocol_id;
+ ts->start_port = tsp->ts[i].start_port;
+ ts->end_port = tsp->ts[i].end_port;
+ ts->start_addr.as_u32 = tsp->ts[i].start_addr.as_u32;
+ ts->end_addr.as_u32 = tsp->ts[i].end_addr.as_u32;
+ }
+ return r;
+}
+
+ikev2_notify_t *
+ikev2_parse_notify_payload (ike_payload_header_t * ikep)
+{
+ ike_notify_payload_header_t *n = (ike_notify_payload_header_t *) ikep;
+ u32 plen = clib_net_to_host_u16 (ikep->length);
+ ikev2_notify_t *r = 0;
+ u32 spi;
+
+ DBG_PLD ("msg_type %U len %u%s%U",
+ format_ikev2_notify_msg_type, clib_net_to_host_u16 (n->msg_type),
+ plen, plen > sizeof (*n) ? " data " : "",
+ format_hex_bytes, n->payload, plen - sizeof (*n));
+
+ r = vec_new (ikev2_notify_t, 1);
+ r->msg_type = clib_net_to_host_u16 (n->msg_type);
+ r->protocol_id = n->protocol_id;
+
+ if (n->spi_size == 4)
+ {
+ clib_memcpy (&spi, n->payload, n->spi_size);
+ r->spi = clib_net_to_host_u32 (spi);
+ DBG_PLD ("spi %lx", r->spi);
+ }
+ else if (n->spi_size == 0)
+ {
+ r->spi = 0;
+ }
+ else
+ {
+ clib_warning ("invalid SPI Size %d", n->spi_size);
+ }
+
+ if (plen > (sizeof (*n) + n->spi_size))
+ {
+ vec_add (r->data, n->payload + n->spi_size,
+ plen - sizeof (*n) - n->spi_size);
+ }
+
+ return r;
+}
+
+void
+ikev2_parse_vendor_payload (ike_payload_header_t * ikep)
+{
+ u32 plen = clib_net_to_host_u16 (ikep->length);
+ int i;
+ int is_string = 1;
+
+ for (i = 0; i < plen - 4; i++)
+ if (!isprint (ikep->payload[i]))
+ is_string = 0;
+
+ DBG_PLD ("len %u data %s:%U",
+ plen,
+ is_string ? "string" : "hex",
+ is_string ? format_ascii_bytes : format_hex_bytes,
+ ikep->payload, plen - sizeof (*ikep));
+}
+
+ikev2_delete_t *
+ikev2_parse_delete_payload (ike_payload_header_t * ikep)
+{
+ ike_delete_payload_header_t *d = (ike_delete_payload_header_t *) ikep;
+ u32 plen = clib_net_to_host_u16 (ikep->length);
+ ikev2_delete_t *r = 0, *del;
+ u16 num_of_spi = clib_net_to_host_u16 (d->num_of_spi);
+ u16 i = 0;
+
+ DBG_PLD ("protocol_id %u spi_size %u num_of_spi %u len %u%s%U",
+ d->protocol_id, d->spi_size, num_of_spi,
+ plen, plen > sizeof (d) ? " data " : "",
+ format_hex_bytes, d->spi, plen - sizeof (*d));
+
+ if (d->protocol_id == IKEV2_PROTOCOL_IKE)
+ {
+ r = vec_new (ikev2_delete_t, 1);
+ r->protocol_id = 1;
+ }
+ else
+ {
+ r = vec_new (ikev2_delete_t, num_of_spi);
+ vec_foreach (del, r)
+ {
+ del->protocol_id = d->protocol_id;
+ del->spi = clib_net_to_host_u32 (d->spi[i++]);
+ }
+ }
+
+ return r;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */