add ipsecmb plugin

Change-Id: I99c0737dfeeec2db267773625ddc9b55324fd237
Signed-off-by: Klement Sekera <ksekera@cisco.com>

8 files changed, 2550 insertions, 0 deletions

diff --git a/src/plugins/ipsecmb/CMakeLists.txt b/src/plugins/ipsecmb/CMakeLists.txt
new file mode 100644
index 00000000000..38ecf644896
--- /dev/null
+++ b/src/plugins/ipsecmb/CMakeLists.txt
@@ -0,0 +1,46 @@
+# Copyright (c) 2018 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.
+
+find_path(IPSECMB_INCLUDE_DIR NAMES intel-ipsec-mb.h HINTS ${IPSECMB_INCLUDE_DIR_HINT})
+find_library(IPSECMB_LIB NAMES libIPSec_MB.a HINTS ${IPSECMB_LIB_DIR_HINT})
+
+if(IPSECMB_INCLUDE_DIR AND IPSECMB_LIB)
+
+	get_filename_component(IPSECMB_LIB_DIR ${IPSECMB_LIB} DIRECTORY)
+	set(IPSECMB_LINK_FLAGS "${IPSECMB_LINK_FLAGS} -L${IPSECMB_LIB_DIR} -Wl,--whole-archive ${IPSECMB_LIB} -Wl,--no-whole-archive")
+	set(IPSECMB_LINK_FLAGS "${IPSECMB_LINK_FLAGS} -Wl,--exclude-libs,libIPSec_MB.a,-l:libIPSec_MB.a")
+	include_directories(${IPSECMB_INCLUDE_DIR})
+	add_vpp_plugin(ipsecmb
+		SOURCES
+		ipsecmb.c
+		ah_encrypt.c
+		ah_decrypt.c
+		esp_encrypt.c
+		esp_decrypt.c
+
+		MULTIARCH_SOURCES
+		ah_encrypt.c
+		ah_decrypt.c
+		esp_encrypt.c
+		esp_decrypt.c
+
+		LINK_FLAGS
+		${IPSECMB_LINK_FLAGS}
+		)
+
+	message(STATUS "Intel IPSecMB found: ${IPSECMB_INCLUDE_DIR}")
+else()
+	message(STATUS "Intel IPSecMB not found")
+endif()
+
+
diff --git a/src/plugins/ipsecmb/ah_decrypt.c b/src/plugins/ipsecmb/ah_decrypt.c
new file mode 100644
index 00000000000..e991671aa63
--- /dev/null
+++ b/src/plugins/ipsecmb/ah_decrypt.c
@@ -0,0 +1,493 @@
+/*
+ * ah_decrypt.c : ipsecmb AH decrypt node
+ *
+ * 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 <vnet/vnet.h>
+#include <vnet/api_errno.h>
+#include <vnet/ip/ip.h>
+
+#include <vnet/ipsec/ipsec.h>
+#include <vnet/ipsec/esp.h>
+#include <vnet/ipsec/ah.h>
+
+#include <ipsecmb/ipsecmb.h>
+
+#define foreach_ah_decrypt_next \
+  _ (DROP, "error-drop")        \
+  _ (IP4_INPUT, "ip4-input")    \
+  _ (IP6_INPUT, "ip6-input")    \
+  _ (IPSEC_GRE_INPUT, "ipsec-gre-input")
+
+#define _(v, s) AH_DECRYPT_NEXT_##v,
+typedef enum
+{
+  foreach_ah_decrypt_next
+#undef _
+    AH_DECRYPT_N_NEXT,
+} ah_decrypt_next_t;
+
+#define foreach_ah_decrypt_error                \
+  _ (RX_PKTS, "AH pkts received")               \
+  _ (DECRYPTION_FAILED, "AH decryption failed") \
+  _ (INTEG_ERROR, "Integrity check failed")     \
+  _ (REPLAY, "SA replayed packet")              \
+  _ (NOT_IP, "Not IP packet (dropped)")
+
+typedef enum
+{
+#define _(sym, str) AH_DECRYPT_ERROR_##sym,
+  foreach_ah_decrypt_error
+#undef _
+    AH_DECRYPT_N_ERROR,
+} ah_decrypt_error_t;
+
+static char *ah_decrypt_error_strings[] = {
+#define _(sym, string) string,
+  foreach_ah_decrypt_error
+#undef _
+};
+
+typedef struct
+{
+  ipsec_integ_alg_t integ_alg;
+} ah_decrypt_trace_t;
+
+/* packet trace format function */
+static u8 *
+format_ah_decrypt_trace (u8 * s, va_list * args)
+{
+  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+  ah_decrypt_trace_t *t = va_arg (*args, ah_decrypt_trace_t *);
+
+  s = format (s, "ah: integrity %U", format_ipsec_integ_alg, t->integ_alg);
+  return s;
+}
+
+typedef struct
+{
+  u8 tos;
+  u8 ttl;
+  u32 ip_version_traffic_class_and_flow_label;
+  u8 hop_limit;
+} ip_mutable_data_t;
+
+#ifdef CLIB_MARCH_VARIANT
+always_inline void
+remove_ah (vlib_main_t * vm, vlib_node_runtime_t * node, u32 * bi0,
+	   u32 * next0, ipsec_sa_t * sa0, u32 ip_hdr_size, u32 icv_size,
+	   u8 icv_padding_len, ah_header_t * ah0, int is_ip6)
+{
+  vlib_buffer_t *b0 = vlib_get_buffer (vm, *bi0);
+
+  if (sa0->is_tunnel)
+    {				/* tunnel mode */
+      vlib_buffer_advance (b0, ip_hdr_size + sizeof (ah_header_t) + icv_size +
+			   icv_padding_len);
+      if (ah0->nexthdr == IP_PROTOCOL_IP_IN_IP)
+	*next0 = AH_DECRYPT_NEXT_IP4_INPUT;
+      else if (ah0->nexthdr == IP_PROTOCOL_IPV6)
+	*next0 = AH_DECRYPT_NEXT_IP6_INPUT;
+      else
+	{
+	  clib_warning ("next header: 0x%x", ah0->nexthdr);
+	  vlib_node_increment_counter (vm, node->node_index,
+				       AH_DECRYPT_ERROR_DECRYPTION_FAILED, 1);
+	  *next0 = AH_DECRYPT_NEXT_DROP;
+	  return;
+	}
+    }
+  else
+    {				/* transport mode */
+      const size_t ip_hdr_offset =
+	sizeof (ah_header_t) + icv_size + icv_padding_len;
+      if (is_ip6)
+	{			/* ipv6 */
+	  ip6_header_t *ih6 =
+	    (ip6_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
+			      ip_hdr_offset);
+	  u8 nexthdr = ah0->nexthdr;
+	  memmove (ih6, vlib_buffer_get_current (b0), sizeof (ip6_header_t));
+	  vlib_buffer_advance (b0, ip_hdr_offset);
+
+	  *next0 = AH_DECRYPT_NEXT_IP6_INPUT;
+	  ih6->protocol = nexthdr;
+	  ih6->payload_length =
+	    clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) -
+				  sizeof (ip6_header_t));
+	}
+      else
+	{			/* ipv4 */
+	  ip4_header_t *ih4 =
+	    (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
+			      ip_hdr_offset);
+	  u8 nexthdr = ah0->nexthdr;
+	  memmove (ih4, vlib_buffer_get_current (b0), sizeof (ip4_header_t));
+	  vlib_buffer_advance (b0, ip_hdr_offset);
+
+	  *next0 = AH_DECRYPT_NEXT_IP4_INPUT;
+	  ih4->ip_version_and_header_length = 0x45;
+	  ih4->fragment_id = 0;
+	  ih4->flags_and_fragment_offset = 0;
+	  ih4->protocol = nexthdr;
+	  ih4->length =
+	    clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
+	  ih4->checksum = ip4_header_checksum (ih4);
+	}
+    }
+
+  /* for IPSec-GRE tunnel next node is ipsec-gre-input */
+  if (PREDICT_FALSE
+      ((vnet_buffer (b0)->ipsec.flags & IPSEC_FLAG_IPSEC_GRE_TUNNEL)))
+    {
+      *next0 = AH_DECRYPT_NEXT_IPSEC_GRE_INPUT;
+    }
+}
+
+always_inline void
+ah_finish_decrypt (vlib_main_t * vm, vlib_node_runtime_t * node,
+		   JOB_AES_HMAC * job, u32 * bi0, u32 * next0, int is_ip6)
+{
+  ipsec_main_t *im = &ipsec_main;
+  *bi0 = (uintptr_t) job->user_data;
+  vlib_buffer_t *b0 = vlib_get_buffer (vm, *bi0);
+  ipsec_sa_t *sa0 =
+    pool_elt_at_index (im->sad, vnet_buffer (b0)->ipsec.sad_index);
+  ipsec_proto_main_t *em = &ipsec_proto_main;
+  u32 icv_size = em->ipsec_proto_main_integ_algs[sa0->integ_alg].trunc_size;
+  u32 ip_hdr_size = 0;
+  ip4_header_t *ih4 = vlib_buffer_get_current (b0);
+  size_t seq_size = 0;
+  if (PREDICT_TRUE (sa0->use_esn))
+    {
+      seq_size = sizeof (u32);
+    }
+  ip_mutable_data_t *md =
+    (ip_mutable_data_t *) ((u8 *) vlib_buffer_get_current (b0) +
+			   b0->current_length + seq_size + icv_size);
+  if (is_ip6)
+    {
+      ip_hdr_size = sizeof (ip6_header_t);
+      ip6_header_t *ih6 = vlib_buffer_get_current (b0);
+      ih6->ip_version_traffic_class_and_flow_label =
+	md->ip_version_traffic_class_and_flow_label;
+      ih6->hop_limit = md->hop_limit;
+    }
+  else
+    {
+      ip_hdr_size = ip4_header_bytes (ih4);
+      ih4->ttl = md->ttl;
+      ih4->tos = md->tos;
+    }
+
+  u8 icv_padding_len = ah_calc_icv_padding_len (icv_size, is_ip6);
+  ah_header_t *ah0 =
+    (ah_header_t *) ((u8 *) vlib_buffer_get_current (b0) + ip_hdr_size);
+  void *digest = ah0 + 1;
+  void *sig = vlib_buffer_get_current (b0) + b0->current_length + seq_size;
+
+  if (PREDICT_FALSE (memcmp (digest, sig, icv_size)))
+    {
+      vlib_node_increment_counter (vm, node->node_index,
+				   AH_DECRYPT_ERROR_INTEG_ERROR, 1);
+      *next0 = AH_DECRYPT_NEXT_DROP;
+      return;
+    }
+
+  if (PREDICT_TRUE (sa0->use_anti_replay))
+    {
+      if (PREDICT_TRUE (sa0->use_esn))
+	esp_replay_advance_esn (sa0, clib_host_to_net_u32 (ah0->seq_no));
+      else
+	esp_replay_advance (sa0, clib_host_to_net_u32 (ah0->seq_no));
+    }
+  remove_ah (vm, node, bi0, next0, sa0, ip_hdr_size, icv_size,
+	     icv_padding_len, ah0, is_ip6);
+  vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+}
+
+always_inline uword
+ah_decrypt_ipsecmb_inline (vlib_main_t * vm,
+			   vlib_node_runtime_t * node,
+			   vlib_frame_t * from_frame, int is_ip6)
+{
+  u32 n_left_from, *from, next_index, *to_next;
+  ipsec_main_t *im = &ipsec_main;
+  ipsecmb_main_t *imbm = &ipsecmb_main;
+  ipsec_proto_main_t *em = &ipsec_proto_main;
+  from = vlib_frame_vector_args (from_frame);
+  n_left_from = from_frame->n_vectors;
+  int icv_size = 0;
+  u32 thread_index = vlib_get_thread_index ();
+  MB_MGR *mgr = imbm->mb_mgr[thread_index];
+  u32 packets_in_flight = 0;
+
+  next_index = node->cached_next_index;
+
+  while (n_left_from > 0 || packets_in_flight > 0)
+    {
+      u32 n_left_to_next;
+
+      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  u32 bi0;
+	  u32 next0;
+	  vlib_buffer_t *b0;
+	  ah_header_t *ah0;
+	  ipsec_sa_t *sa0;
+	  ipsecmb_sa_t *samb0;
+	  u32 sa_index0 = ~0;
+	  u32 seq;
+	  ip4_header_t *ih4 = 0;
+	  ip6_header_t *ih6 = 0;
+	  u8 ip_hdr_size = 0;
+
+	  bi0 = from[0];
+	  from += 1;
+	  n_left_from -= 1;
+
+	  next0 = AH_DECRYPT_NEXT_DROP;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+	  ih4 = vlib_buffer_get_current (b0);
+	  ih6 = vlib_buffer_get_current (b0);
+
+	  sa_index0 = vnet_buffer (b0)->ipsec.sad_index;
+	  sa0 = pool_elt_at_index (im->sad, sa_index0);
+	  samb0 = pool_elt_at_index (imbm->sad, sa_index0);
+
+	  if (is_ip6)
+	    {
+	      ip6_ext_header_t *prev = NULL;
+	      ip6_ext_header_find_t (ih6, prev, ah0, IP_PROTOCOL_IPSEC_AH);
+	      ip_hdr_size = sizeof (ip6_header_t);
+	      ASSERT ((u8 *) ah0 - (u8 *) ih6 == ip_hdr_size);
+	    }
+	  else
+	    {
+	      ip_hdr_size = ip4_header_bytes (ih4);
+	      ah0 = (ah_header_t *) (ih4 + 1);
+	    }
+
+	  seq = clib_host_to_net_u32 (ah0->seq_no);
+	  /* anti-replay check */
+	  // TODO UT remaining
+	  if (sa0->use_anti_replay)
+	    {
+	      int rv = 0;
+
+	      if (PREDICT_TRUE (sa0->use_esn))
+		rv = esp_replay_check_esn (sa0, seq);
+	      else
+		rv = esp_replay_check (sa0, seq);
+
+	      if (PREDICT_FALSE (rv))
+		{
+		  clib_warning ("anti-replay SPI %u seq %u", sa0->spi, seq);
+		  vlib_node_increment_counter (vm, node->node_index,
+					       AH_DECRYPT_ERROR_REPLAY, 1);
+		  goto trace;
+		}
+	    }
+
+	  sa0->total_data_size += b0->current_length;
+	  icv_size =
+	    em->ipsec_proto_main_integ_algs[sa0->integ_alg].trunc_size;
+	  if (PREDICT_TRUE (sa0->integ_alg != IPSEC_INTEG_ALG_NONE))
+	    {
+	      u8 *icv = (u8 *) vlib_buffer_get_current (b0) + ip_hdr_size +
+		sizeof (ah_header_t);
+	      size_t seq_size = 0;
+	      if (PREDICT_TRUE (sa0->use_esn))
+		{
+		  *(u32 *) (vlib_buffer_get_current (b0) +
+			    b0->current_length) = sa0->seq_hi;
+		  seq_size = sizeof (u32);
+		}
+	      clib_memcpy (vlib_buffer_get_current (b0) + b0->current_length +
+			   seq_size, icv, icv_size);
+	      memset (icv, 0, icv_size);
+
+	      ip_mutable_data_t *md =
+		(ip_mutable_data_t *) ((u8 *) vlib_buffer_get_current (b0) +
+				       b0->current_length + seq_size +
+				       icv_size);
+	      if (is_ip6)
+		{
+		  md->ip_version_traffic_class_and_flow_label =
+		    ih6->ip_version_traffic_class_and_flow_label;
+		  md->hop_limit = ih6->hop_limit;
+		  ih6->ip_version_traffic_class_and_flow_label = 0x60;
+		  ih6->hop_limit = 0;
+		}
+	      else
+		{
+		  md->tos = ih4->tos;
+		  md->ttl = ih4->ttl;
+		  ih4->tos = 0;
+		  ih4->ttl = 0;
+		  ih4->checksum = 0;
+		  ih4->flags_and_fragment_offset = 0;
+		}
+
+	      JOB_AES_HMAC *job = IPSECMB_FUNC (get_next_job) (mgr);
+	      job->src = vlib_buffer_get_current (b0);
+	      job->hash_start_src_offset_in_bytes = 0;
+	      job->cipher_mode = NULL_CIPHER;
+	      job->hash_alg = imbm->integ_algs[sa0->integ_alg].hash_alg;
+	      job->auth_tag_output_len_in_bytes =
+		imbm->integ_algs[sa0->integ_alg].hash_output_length;
+	      job->auth_tag_output = icv;
+	      job->msg_len_to_hash_in_bytes = b0->current_length + seq_size;
+	      job->cipher_direction = DECRYPT;
+	      job->chain_order = HASH_CIPHER;
+	      job->u.HMAC._hashed_auth_key_xor_ipad = samb0->ipad_hash;
+	      job->u.HMAC._hashed_auth_key_xor_opad = samb0->opad_hash;
+
+	      job->user_data = (void *) (uintptr_t) bi0;
+	      job->user_data2 = (void *) (uintptr_t) next0;
+	      vnet_buffer (b0)->ipsec.sad_index = sa_index0;
+	      job = IPSECMB_FUNC (submit_job) (mgr);
+	      ++packets_in_flight;
+
+	      if (!job)
+		{
+		  continue;
+		}
+	      --packets_in_flight;
+	      ASSERT (STS_COMPLETED == job->status);
+	      ah_finish_decrypt (vm, node, job, &bi0, &next0, is_ip6);
+	    }
+	  else
+	    {
+	      remove_ah (vm, node, &bi0, &next0, sa0, ip_hdr_size, icv_size,
+			 0, ah0, is_ip6);
+	    }
+	trace:
+	  to_next[0] = bi0;
+	  to_next += 1;
+	  n_left_to_next -= 1;
+	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+	    {
+	      b0->flags |= VLIB_BUFFER_IS_TRACED;
+	      ah_decrypt_trace_t *tr =
+		vlib_add_trace (vm, node, b0, sizeof (*tr));
+	      tr->integ_alg = sa0->integ_alg;
+	    }
+	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+					   n_left_to_next, bi0, next0);
+	}
+
+      if (0 == n_left_from)
+	{
+	  JOB_AES_HMAC *job = NULL;
+	  while (n_left_to_next > 0 && (job = IPSECMB_FUNC (flush_job) (mgr)))
+	    {
+	      --packets_in_flight;
+	      ASSERT (STS_COMPLETED == job->status);
+	      u32 bi0, next0;
+	      ah_finish_decrypt (vm, node, job, &bi0, &next0, is_ip6);
+	      to_next[0] = bi0;
+	      to_next += 1;
+	      n_left_to_next -= 1;
+	      vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
+	      if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+		{
+		  ipsec_sa_t *sa0 = pool_elt_at_index (im->sad,
+						       vnet_buffer
+						       (b0)->ipsec.sad_index);
+		  b0->flags |= VLIB_BUFFER_IS_TRACED;
+		  ah_decrypt_trace_t *tr =
+		    vlib_add_trace (vm, node, b0, sizeof (*tr));
+		  tr->integ_alg = sa0->integ_alg;
+		}
+	      vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+					       n_left_to_next, bi0, next0);
+	    }
+	}
+
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+    }
+  vlib_node_increment_counter (vm, node->node_index, AH_DECRYPT_ERROR_RX_PKTS,
+			       from_frame->n_vectors);
+
+  return from_frame->n_vectors;
+}
+
+VLIB_NODE_FN (ah4_decrypt_ipsecmb_node) (vlib_main_t * vm,
+					 vlib_node_runtime_t * node,
+					 vlib_frame_t * from_frame)
+{
+  return ah_decrypt_ipsecmb_inline (vm, node, from_frame, 0 /*is_ip6 */ );
+}
+
+VLIB_NODE_FN (ah6_decrypt_ipsecmb_node) (vlib_main_t * vm,
+					 vlib_node_runtime_t * node,
+					 vlib_frame_t * from_frame)
+{
+  return ah_decrypt_ipsecmb_inline (vm, node, from_frame, 1 /*is_ip6 */ );
+}
+#endif
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ah4_decrypt_ipsecmb_node) = {
+    .name = "ah4-decrypt-ipsecmb",
+    .vector_size = sizeof (u32),
+    .format_trace = format_ah_decrypt_trace,
+    .type = VLIB_NODE_TYPE_INTERNAL,
+
+    .n_errors = ARRAY_LEN (ah_decrypt_error_strings),
+    .error_strings = ah_decrypt_error_strings,
+
+    .n_next_nodes = AH_DECRYPT_N_NEXT,
+    .next_nodes =
+        {
+#define _(s, n) [AH_DECRYPT_NEXT_##s] = n,
+            foreach_ah_decrypt_next
+#undef _
+        },
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ah6_decrypt_ipsecmb_node) = {
+    .name = "ah6-decrypt-ipsecmb",
+    .vector_size = sizeof (u32),
+    .format_trace = format_ah_decrypt_trace,
+    .type = VLIB_NODE_TYPE_INTERNAL,
+
+    .n_errors = ARRAY_LEN (ah_decrypt_error_strings),
+    .error_strings = ah_decrypt_error_strings,
+
+    .n_next_nodes = AH_DECRYPT_N_NEXT,
+    .next_nodes =
+        {
+#define _(s, n) [AH_DECRYPT_NEXT_##s] = n,
+            foreach_ah_decrypt_next
+#undef _
+        },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/ipsecmb/ah_encrypt.c b/src/plugins/ipsecmb/ah_encrypt.c
new file mode 100644
index 00000000000..927deae188f
--- /dev/null
+++ b/src/plugins/ipsecmb/ah_encrypt.c
@@ -0,0 +1,466 @@
+/*
+ * ah_encrypt.c : ipsecmb AH encrypt node
+ *
+ * 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 <vnet/vnet.h>
+#include <vnet/api_errno.h>
+#include <vnet/ip/ip.h>
+
+#include <vnet/ipsec/ipsec.h>
+#include <vnet/ipsec/esp.h>
+#include <vnet/ipsec/ah.h>
+
+#include <ipsecmb/ipsecmb.h>
+
+#define foreach_ah_encrypt_next                   \
+_(DROP, "error-drop")                              \
+_(IP4_LOOKUP, "ip4-lookup")                        \
+_(IP6_LOOKUP, "ip6-lookup")                        \
+_(INTERFACE_OUTPUT, "interface-output")
+
+#define _(v, s) AH_ENCRYPT_NEXT_##v,
+typedef enum
+{
+  foreach_ah_encrypt_next
+#undef _
+    AH_ENCRYPT_N_NEXT,
+} ah_encrypt_next_t;
+
+#define foreach_ah_encrypt_error                   \
+ _(RX_PKTS, "AH pkts received")                    \
+ _(SEQ_CYCLED, "sequence number cycled")
+
+
+typedef enum
+{
+#define _(sym,str) AH_ENCRYPT_ERROR_##sym,
+  foreach_ah_encrypt_error
+#undef _
+    AH_ENCRYPT_N_ERROR,
+} ah_encrypt_error_t;
+
+static char *ah_encrypt_error_strings[] = {
+#define _(sym,string) string,
+  foreach_ah_encrypt_error
+#undef _
+};
+
+typedef struct
+{
+  u32 spi;
+  u32 seq;
+  ipsec_integ_alg_t integ_alg;
+} ah_encrypt_trace_t;
+
+/* packet trace format function */
+static u8 *
+format_ah_encrypt_trace (u8 * s, va_list * args)
+{
+  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+  ah_encrypt_trace_t *t = va_arg (*args, ah_encrypt_trace_t *);
+
+  s = format (s, "ah: spi %u seq %u integrity %U",
+	      t->spi, t->seq, format_ipsec_integ_alg, t->integ_alg);
+  return s;
+}
+
+#ifdef CLIB_MARCH_VARIANT
+always_inline void
+ah_finish_encrypt (vlib_main_t * vm, vlib_buffer_t * b0, ipsec_sa_t * sa0,
+		   int is_ip6)
+{
+  if (is_ip6)
+    {
+      ip6_header_t *oh6 = 0;
+      oh6 = vlib_buffer_get_current (b0);
+      oh6->ip_version_traffic_class_and_flow_label =
+	vnet_buffer (b0)->ipsec.ip_version_traffic_class_and_flow_label;
+      oh6->hop_limit = vnet_buffer (b0)->ipsec.ttl_or_hop_limit;
+    }
+  else
+    {
+      ip4_header_t *oh4 = 0;
+      oh4 = vlib_buffer_get_current (b0);
+      oh4->ttl = vnet_buffer (b0)->ipsec.ttl_or_hop_limit;
+      oh4->tos = vnet_buffer (b0)->ipsec.tos;
+      oh4->checksum = ip4_header_checksum (oh4);
+    }
+}
+
+always_inline uword
+ah_encrypt_ipsecmb_inline (vlib_main_t * vm,
+			   vlib_node_runtime_t * node,
+			   vlib_frame_t * from_frame, int is_ip6)
+{
+  u32 n_left_from, *from, *to_next = 0, next_index;
+  int icv_size = 0;
+  from = vlib_frame_vector_args (from_frame);
+  n_left_from = from_frame->n_vectors;
+  ipsec_main_t *im = &ipsec_main;
+  ipsecmb_main_t *imbm = &ipsecmb_main;
+  ipsec_proto_main_t *em = &ipsec_proto_main;
+  next_index = node->cached_next_index;
+  u32 thread_index = vlib_get_thread_index ();
+  MB_MGR *mgr = imbm->mb_mgr[thread_index];
+  u32 packets_in_flight = 0;
+
+  while (n_left_from > 0 || packets_in_flight > 0)
+    {
+      u32 n_left_to_next;
+
+      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  u32 bi0, next0;
+	  vlib_buffer_t *b0 = 0;
+	  u32 sa_index0;
+	  ipsec_sa_t *sa0;
+	  ipsecmb_sa_t *samb0;
+	  ip4_header_t *ih4, *oh4 = 0;
+	  ip6_header_t *ih6, *oh6 = 0;
+	  ah_header_t *ah = 0;
+	  u8 next_hdr_type;
+	  u8 transport_mode = 0;
+
+	  bi0 = from[0];
+	  from += 1;
+	  n_left_from -= 1;
+
+	  next0 = AH_ENCRYPT_NEXT_DROP;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+	  sa_index0 = vnet_buffer (b0)->ipsec.sad_index;
+	  sa0 = pool_elt_at_index (im->sad, sa_index0);
+	  samb0 = pool_elt_at_index (imbm->sad, sa_index0);
+
+	  if (PREDICT_FALSE (esp_seq_advance (sa0)))
+	    {
+	      clib_warning ("sequence number counter has cycled SPI %u",
+			    sa0->spi);
+	      vlib_node_increment_counter (vm, node->node_index,
+					   AH_ENCRYPT_ERROR_SEQ_CYCLED, 1);
+	      to_next[0] = bi0;
+	      to_next += 1;
+	      goto trace;
+	    }
+
+
+	  sa0->total_data_size += b0->current_length;
+
+	  ssize_t adv;
+	  ih4 = vlib_buffer_get_current (b0);
+
+	  if (PREDICT_TRUE (sa0->is_tunnel))
+	    {
+	      if (!is_ip6)
+		adv = -sizeof (ip4_and_ah_header_t);
+	      else
+		adv = -sizeof (ip6_and_ah_header_t);
+	    }
+	  else
+	    {
+	      adv = -sizeof (ah_header_t);
+	    }
+
+	  const u8 padding_len = ah_calc_icv_padding_len (icv_size, is_ip6);
+	  adv -= padding_len;
+
+	  icv_size =
+	    em->ipsec_proto_main_integ_algs[sa0->integ_alg].trunc_size;
+	  /* transport mode save the eth header before it is overwritten */
+	  if (PREDICT_FALSE (!sa0->is_tunnel))
+	    {
+	      ethernet_header_t *ieh0 = (ethernet_header_t *)
+		((u8 *) vlib_buffer_get_current (b0) -
+		 sizeof (ethernet_header_t));
+	      ethernet_header_t *oeh0 =
+		(ethernet_header_t *) ((u8 *) ieh0 + (adv - icv_size));
+	      clib_memcpy (oeh0, ieh0, sizeof (ethernet_header_t));
+	    }
+
+	  vlib_buffer_advance (b0, adv - icv_size);
+
+	  if (is_ip6)
+	    {
+	      ih6 = (ip6_header_t *) ih4;
+	      oh6 = vlib_buffer_get_current (b0);
+	      ah = (ah_header_t *) (oh6 + 1);
+	      vnet_buffer (b0)->ipsec.ttl_or_hop_limit = ih6->hop_limit;
+	      vnet_buffer (b0)->
+		ipsec.ip_version_traffic_class_and_flow_label =
+		ih6->ip_version_traffic_class_and_flow_label;
+
+	      if (PREDICT_TRUE (sa0->is_tunnel))
+		{
+		  next_hdr_type = IP_PROTOCOL_IPV6;
+		}
+	      else
+		{
+		  next_hdr_type = ih6->protocol;
+		  memmove (oh6, ih6, sizeof (ip6_header_t));
+		}
+
+	      oh6->protocol = IP_PROTOCOL_IPSEC_AH;
+	      oh6->ip_version_traffic_class_and_flow_label = 0x60;
+	      oh6->hop_limit = 0;
+	      ah->reserved = 0;
+	      ah->nexthdr = next_hdr_type;
+	      ah->spi = clib_net_to_host_u32 (sa0->spi);
+	      ah->seq_no = clib_net_to_host_u32 (sa0->seq);
+	      ah->hdrlen =
+		(sizeof (ah_header_t) + icv_size + padding_len) / 4 - 2;
+	      oh6->payload_length =
+		clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) -
+				      sizeof (ip6_header_t));
+	    }
+	  else
+	    {
+	      oh4 = vlib_buffer_get_current (b0);
+	      memset (oh4, 0, sizeof (*oh4));
+	      ah = (ah_header_t *) (oh4 + 1);
+	      memset (ah, 0, sizeof (*ah));
+	      vnet_buffer (b0)->ipsec.ttl_or_hop_limit = ih4->ttl;
+	      vnet_buffer (b0)->ipsec.tos = ih4->tos;
+
+	      if (PREDICT_TRUE (sa0->is_tunnel))
+		{
+		  next_hdr_type = IP_PROTOCOL_IP_IN_IP;
+		}
+	      else
+		{
+		  next_hdr_type = ih4->protocol;
+		  memmove (oh4, ih4, sizeof (ip4_header_t));
+		}
+
+	      oh4->length =
+		clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
+	      oh4->ip_version_and_header_length = 0x45;
+	      oh4->fragment_id = 0;
+	      oh4->flags_and_fragment_offset = 0;
+	      oh4->ttl = 0;
+	      oh4->tos = 0;
+	      oh4->protocol = IP_PROTOCOL_IPSEC_AH;
+	      ah->spi = clib_net_to_host_u32 (sa0->spi);
+	      ah->seq_no = clib_net_to_host_u32 (sa0->seq);
+	      oh4->checksum = 0;
+	      ah->nexthdr = next_hdr_type;
+	      ah->hdrlen =
+		(sizeof (ah_header_t) + icv_size + padding_len) / 4 - 2;
+	    }
+
+	  if (PREDICT_TRUE (!is_ip6 && sa0->is_tunnel && !sa0->is_tunnel_ip6))
+	    {
+	      oh4->src_address.as_u32 = sa0->tunnel_src_addr.ip4.as_u32;
+	      oh4->dst_address.as_u32 = sa0->tunnel_dst_addr.ip4.as_u32;
+
+	      next0 = AH_ENCRYPT_NEXT_IP4_LOOKUP;
+	      vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+	    }
+	  else if (is_ip6 && sa0->is_tunnel && sa0->is_tunnel_ip6)
+	    {
+	      oh6->src_address.as_u64[0] = sa0->tunnel_src_addr.ip6.as_u64[0];
+	      oh6->src_address.as_u64[1] = sa0->tunnel_src_addr.ip6.as_u64[1];
+	      oh6->dst_address.as_u64[0] = sa0->tunnel_dst_addr.ip6.as_u64[0];
+	      oh6->dst_address.as_u64[1] = sa0->tunnel_dst_addr.ip6.as_u64[1];
+	      next0 = AH_ENCRYPT_NEXT_IP6_LOOKUP;
+	      vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+	    }
+	  else
+	    {
+	      transport_mode = 1;
+	    }
+
+	  memset (ah + 1, 0, icv_size);
+
+	  JOB_AES_HMAC *job = IPSECMB_FUNC (get_next_job) (mgr);
+	  job->src = vlib_buffer_get_current (b0);
+	  job->hash_start_src_offset_in_bytes = 0;
+	  job->cipher_mode = NULL_CIPHER;
+	  job->hash_alg = imbm->integ_algs[sa0->integ_alg].hash_alg;
+	  job->auth_tag_output_len_in_bytes =
+	    imbm->integ_algs[sa0->integ_alg].hash_output_length;
+	  job->auth_tag_output = (u8 *) (ah + 1);
+	  if (PREDICT_TRUE (sa0->use_esn))
+	    {
+	      *(u32 *) (vlib_buffer_get_current (b0) + b0->current_length) =
+		sa0->seq_hi;
+	      b0->current_length += sizeof (u32);
+	    }
+	  job->msg_len_to_hash_in_bytes = b0->current_length;
+	  job->cipher_direction = ENCRYPT;
+	  job->chain_order = HASH_CIPHER;
+	  job->u.HMAC._hashed_auth_key_xor_ipad = samb0->ipad_hash;
+	  job->u.HMAC._hashed_auth_key_xor_opad = samb0->opad_hash;
+
+
+	  job->user_data = (void *) (uintptr_t) bi0;
+	  job->user_data2 = (void *) (uintptr_t) next0;
+	  vnet_buffer (b0)->ipsec.sad_index = sa_index0;
+
+	  job = IPSECMB_FUNC (submit_job) (mgr);
+	  ++packets_in_flight;
+
+	  if (!job)
+	    {
+	      continue;
+	    }
+
+	  --packets_in_flight;
+	  ASSERT (STS_COMPLETED == job->status);
+	  bi0 = (uintptr_t) job->user_data;
+	  next0 = (uintptr_t) job->user_data2;
+	  b0 = vlib_get_buffer (vm, bi0);
+	  sa0 =
+	    pool_elt_at_index (im->sad, vnet_buffer (b0)->ipsec.sad_index);
+	  ah_finish_encrypt (vm, b0, sa0, is_ip6);
+	  if (!sa0->is_tunnel && !sa0->is_tunnel_ip6)
+	    {
+	      next0 = AH_ENCRYPT_NEXT_INTERFACE_OUTPUT;
+	      vlib_buffer_advance (b0, -sizeof (ethernet_header_t));
+	    }
+
+	  to_next[0] = bi0;
+	  to_next += 1;
+	  n_left_to_next -= 1;
+
+	trace:
+	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+	    {
+	      ah_encrypt_trace_t *tr =
+		vlib_add_trace (vm, node, b0, sizeof (*tr));
+	      tr->spi = sa0->spi;
+	      tr->seq = sa0->seq - 1;
+	      tr->integ_alg = sa0->integ_alg;
+	    }
+
+	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+					   to_next, n_left_to_next, bi0,
+					   next0);
+	}
+
+      if (PREDICT_FALSE (n_left_from == 0))
+	{
+	  JOB_AES_HMAC *job = NULL;
+	  while (n_left_to_next > 0 && (job = IPSECMB_FUNC (flush_job) (mgr)))
+	    {
+	      --packets_in_flight;
+	      u32 bi0, next0;
+	      vlib_buffer_t *b0;
+	      ipsec_sa_t *sa0;
+
+	      ASSERT (STS_COMPLETED == job->status);
+	      bi0 = (uintptr_t) job->user_data;
+	      next0 = (uintptr_t) job->user_data2;
+	      b0 = vlib_get_buffer (vm, bi0);
+	      sa0 =
+		pool_elt_at_index (im->sad,
+				   vnet_buffer (b0)->ipsec.sad_index);
+	      ah_finish_encrypt (vm, b0, sa0, is_ip6);
+	      if (!sa0->is_tunnel && !sa0->is_tunnel_ip6)
+		{
+		  next0 = AH_ENCRYPT_NEXT_INTERFACE_OUTPUT;
+		  vlib_buffer_advance (b0, -sizeof (ethernet_header_t));
+		}
+
+	      to_next[0] = bi0;
+	      to_next += 1;
+	      n_left_to_next -= 1;
+
+	      if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+		{
+		  ah_encrypt_trace_t *tr =
+		    vlib_add_trace (vm, node, b0, sizeof (*tr));
+		  tr->spi = sa0->spi;
+		  tr->seq = sa0->seq - 1;
+		  tr->integ_alg = sa0->integ_alg;
+		}
+
+	      vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+					       to_next, n_left_to_next, bi0,
+					       next0);
+	    }
+	}
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+    }
+  vlib_node_increment_counter (vm, node->node_index, AH_ENCRYPT_ERROR_RX_PKTS,
+			       from_frame->n_vectors);
+
+  return from_frame->n_vectors;
+}
+
+VLIB_NODE_FN (ah4_encrypt_ipsecmb_node) (vlib_main_t * vm,
+					 vlib_node_runtime_t * node,
+					 vlib_frame_t * from_frame)
+{
+  return ah_encrypt_ipsecmb_inline (vm, node, from_frame, 0 /*is_ip6 */ );
+}
+
+VLIB_NODE_FN (ah6_encrypt_ipsecmb_node) (vlib_main_t * vm,
+					 vlib_node_runtime_t * node,
+					 vlib_frame_t * from_frame)
+{
+  return ah_encrypt_ipsecmb_inline (vm, node, from_frame, 1 /*is_ip6 */ );
+}
+
+#endif
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ah4_encrypt_ipsecmb_node) = {
+  .name = "ah4-encrypt-ipsecmb",
+  .vector_size = sizeof (u32),
+  .format_trace = format_ah_encrypt_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = ARRAY_LEN(ah_encrypt_error_strings),
+  .error_strings = ah_encrypt_error_strings,
+
+  .n_next_nodes = AH_ENCRYPT_N_NEXT,
+  .next_nodes = {
+#define _(s,n) [AH_ENCRYPT_NEXT_##s] = n,
+    foreach_ah_encrypt_next
+#undef _
+  },
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ah6_encrypt_ipsecmb_node) = {
+  .name = "ah6-encrypt-ipsecmb",
+  .vector_size = sizeof (u32),
+  .format_trace = format_ah_encrypt_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = ARRAY_LEN(ah_encrypt_error_strings),
+  .error_strings = ah_encrypt_error_strings,
+
+  .n_next_nodes = AH_ENCRYPT_N_NEXT,
+  .next_nodes = {
+#define _(s,n) [AH_ENCRYPT_NEXT_##s] = n,
+    foreach_ah_encrypt_next
+#undef _
+  },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/ipsecmb/esp_decrypt.c b/src/plugins/ipsecmb/esp_decrypt.c
new file mode 100644
index 00000000000..835f41eb35d
--- /dev/null
+++ b/src/plugins/ipsecmb/esp_decrypt.c
@@ -0,0 +1,471 @@
+/*
+ * esp_decrypt.c : ipsecmb ESP decrypt node
+ *
+ * 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 <vnet/vnet.h>
+#include <vnet/api_errno.h>
+#include <vnet/ip/ip.h>
+
+#include <vnet/ipsec/ipsec.h>
+#include <vnet/ipsec/esp.h>
+#include <ipsecmb/ipsecmb.h>
+
+#define foreach_esp_decrypt_next                \
+_(DROP, "error-drop")                           \
+_(IP4_INPUT, "ip4-input")                       \
+_(IP6_INPUT, "ip6-input")                       \
+_(IPSEC_GRE_INPUT, "ipsec-gre-input")
+
+#define _(v, s) ESP_DECRYPT_NEXT_##v,
+typedef enum
+{
+  foreach_esp_decrypt_next
+#undef _
+    ESP_DECRYPT_N_NEXT,
+} esp_decrypt_next_t;
+
+
+#define foreach_esp_decrypt_error                   \
+ _(RX_PKTS, "ESP pkts received")                    \
+ _(NO_BUFFER, "No buffer (packed dropped)")         \
+ _(DECRYPTION_FAILED, "ESP decryption failed")      \
+ _(INTEG_ERROR, "Integrity check failed")           \
+ _(REPLAY, "SA replayed packet")                    \
+ _(NOT_IP, "Not IP packet (dropped)")
+
+typedef enum
+{
+#define _(sym,str) ESP_DECRYPT_ERROR_##sym,
+  foreach_esp_decrypt_error
+#undef _
+    ESP_DECRYPT_N_ERROR,
+} esp_decrypt_error_t;
+
+static char *esp_decrypt_error_strings[] = {
+#define _(sym,string) string,
+  foreach_esp_decrypt_error
+#undef _
+};
+
+typedef struct
+{
+  ipsec_crypto_alg_t crypto_alg;
+  ipsec_integ_alg_t integ_alg;
+} esp_decrypt_trace_t;
+
+/* packet trace format function */
+static u8 *
+format_esp_decrypt_trace (u8 * s, va_list * args)
+{
+  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+  esp_decrypt_trace_t *t = va_arg (*args, esp_decrypt_trace_t *);
+
+  s = format (s, "esp: crypto %U integrity %U",
+	      format_ipsec_crypto_alg, t->crypto_alg,
+	      format_ipsec_integ_alg, t->integ_alg);
+  return s;
+}
+
+#ifdef CLIB_MARCH_VARIANT
+always_inline void
+esp_finish_decrypt (vlib_main_t * vm, vlib_node_runtime_t * node,
+		    JOB_AES_HMAC * job, u32 * next0, ipsec_sa_t * sa0,
+		    int is_ip6)
+{
+  u32 bi0 = (uintptr_t) job->user_data;
+  vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
+  esp_footer_t *f0;
+  ip4_header_t *ih4 = vlib_buffer_get_current (b0);
+  ip6_header_t *ih6 = vlib_buffer_get_current (b0);
+
+  if (NULL_HASH != job->hash_alg)
+    {
+      if (0 !=
+	  memcmp (job->auth_tag_output,
+		  job->auth_tag_output - job->auth_tag_output_len_in_bytes,
+		  job->auth_tag_output_len_in_bytes))
+	{
+	  vlib_node_increment_counter (vm, node->node_index,
+				       ESP_DECRYPT_ERROR_INTEG_ERROR, 1);
+	  *next0 = ESP_DECRYPT_NEXT_DROP;
+	  return;
+	}
+    }
+
+  f0 = (esp_footer_t *) ((u8 *) vlib_buffer_get_current (b0) +
+			 b0->current_length);
+  b0->current_length -= f0->pad_length;
+
+  /* tunnel mode */
+  if (sa0->is_tunnel)
+    {
+      if (f0->next_header == IP_PROTOCOL_IP_IN_IP)
+	{
+	  *next0 = ESP_DECRYPT_NEXT_IP4_INPUT;
+	}
+      else if (f0->next_header == IP_PROTOCOL_IPV6)
+	{
+	  *next0 = ESP_DECRYPT_NEXT_IP6_INPUT;
+	}
+      else
+	{
+	  vlib_node_increment_counter (vm, node->node_index,
+				       ESP_DECRYPT_ERROR_DECRYPTION_FAILED,
+				       1);
+	  *next0 = ESP_DECRYPT_NEXT_DROP;
+	  return;
+	}
+    }
+  /* transport mode */
+  else
+    {
+      if (is_ip6)
+	{
+	  *next0 = ESP_DECRYPT_NEXT_IP6_INPUT;
+	  ih6->protocol = f0->next_header;
+	  ih6->payload_length =
+	    clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) -
+				  sizeof (ip6_header_t));
+	}
+      else
+	{
+	  *next0 = ESP_DECRYPT_NEXT_IP4_INPUT;
+	  ih4->fragment_id = 0;
+	  ih4->flags_and_fragment_offset = 0;
+	  ih4->protocol = f0->next_header;
+	  ih4->length =
+	    clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
+	  ih4->checksum = ip4_header_checksum (ih4);
+	}
+    }
+
+  /* for IPSec-GRE tunnel next node is ipsec-gre-input */
+  if ((vnet_buffer (b0)->ipsec.flags & IPSEC_FLAG_IPSEC_GRE_TUNNEL))
+    {
+      *next0 = ESP_DECRYPT_NEXT_IPSEC_GRE_INPUT;
+    }
+
+  vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+  if (sa0->use_anti_replay)
+    {
+      if (sa0->use_esn)
+	esp_replay_advance_esn (sa0, vnet_buffer (b0)->ipsec.seq);
+      else
+	esp_replay_advance (sa0, vnet_buffer (b0)->ipsec.seq);
+    }
+}
+
+always_inline uword
+esp_decrypt_ipsecmb_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
+			    vlib_frame_t * from_frame, int is_ip6)
+{
+  u32 n_left_from, *from, next_index, *to_next;
+  u32 packets_in_flight = 0;
+  ipsec_main_t *im = &ipsec_main;
+  ipsecmb_main_t *imbm = &ipsecmb_main;
+  ipsec_proto_main_t *em = &ipsec_proto_main;
+  from = vlib_frame_vector_args (from_frame);
+  n_left_from = from_frame->n_vectors;
+  u32 thread_index = vlib_get_thread_index ();
+  MB_MGR *mgr = imbm->mb_mgr[thread_index];
+  u32 *to_be_freed = NULL;
+
+  next_index = node->cached_next_index;
+
+  while (n_left_from > 0 || packets_in_flight > 0)
+    {
+      u32 n_left_to_next;
+
+      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  u32 bi0, next0;
+	  vlib_buffer_t *b0;
+	  esp_header_t *esp0;
+	  ipsec_sa_t *sa0;
+	  ipsecmb_sa_t *samb0;
+	  u32 sa_index0 = ~0;
+	  u32 seq;
+
+	  bi0 = from[0];
+	  from += 1;
+	  n_left_from -= 1;
+
+	  next0 = ESP_DECRYPT_NEXT_DROP;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+	  esp0 = vlib_buffer_get_current (b0);
+
+	  sa_index0 = vnet_buffer (b0)->ipsec.sad_index;
+	  sa0 = pool_elt_at_index (im->sad, sa_index0);
+	  samb0 = pool_elt_at_index (imbm->sad, sa_index0);
+
+	  vnet_buffer (b0)->ipsec.seq = seq =
+	    clib_host_to_net_u32 (esp0->seq);
+
+	  /* anti-replay check */
+	  if (sa0->use_anti_replay)
+	    {
+	      int rv = 0;
+
+	      if (sa0->use_esn)
+		rv = esp_replay_check_esn (sa0, seq);
+	      else
+		rv = esp_replay_check (sa0, seq);
+
+	      if (PREDICT_FALSE (rv))
+		{
+		  vlib_node_increment_counter (vm, node->node_index,
+					       ESP_DECRYPT_ERROR_REPLAY, 1);
+		  goto trace;
+		}
+	    }
+
+	  sa0->total_data_size += b0->current_length;
+
+	  if (PREDICT_FALSE (b0->n_add_refs > 0))
+	    {
+	      vec_add1 (to_be_freed, bi0);
+	      b0 = vlib_buffer_copy (vm, b0);
+	      bi0 = vlib_get_buffer_index (vm, b0);
+	    }
+
+	  JOB_AES_HMAC *job = IPSECMB_FUNC (get_next_job) (mgr);
+	  int trunc_size = 0;
+	  if (sa0->integ_alg != IPSEC_INTEG_ALG_NONE)
+	    {
+	      trunc_size =
+		em->ipsec_proto_main_integ_algs[sa0->integ_alg].trunc_size;
+	      // put calculated auth tag after in-packet auth tag
+	      job->auth_tag_output =
+		vlib_buffer_get_current (b0) + b0->current_length;
+	      b0->current_length -= trunc_size;
+	      job->msg_len_to_hash_in_bytes = b0->current_length;
+	      job->auth_tag_output_len_in_bytes = trunc_size;
+	      job->u.HMAC._hashed_auth_key_xor_ipad = samb0->ipad_hash;
+	      job->u.HMAC._hashed_auth_key_xor_opad = samb0->opad_hash;
+	    }
+
+	  job->hash_alg = imbm->integ_algs[sa0->integ_alg].hash_alg;
+	  u8 ip_hdr_size = 0;
+
+	  if ((sa0->crypto_alg >= IPSEC_CRYPTO_ALG_AES_CBC_128 &&
+	       sa0->crypto_alg <= IPSEC_CRYPTO_ALG_AES_CBC_256) ||
+	      (sa0->crypto_alg >= IPSEC_CRYPTO_ALG_DES_CBC &&
+	       sa0->crypto_alg <= IPSEC_CRYPTO_ALG_3DES_CBC))
+	    {
+	      const int block_size =
+		em->ipsec_proto_main_crypto_algs[sa0->crypto_alg].block_size;
+	      const int iv_size =
+		em->ipsec_proto_main_crypto_algs[sa0->crypto_alg].iv_size;
+
+	      int blocks =
+		(b0->current_length - sizeof (esp_header_t) -
+		 iv_size) / block_size;
+	      if (b0->current_length - sizeof (esp_header_t) - iv_size <
+		  block_size || blocks <= 0)
+		{
+		  vlib_node_increment_counter (vm, node->node_index,
+					       ESP_DECRYPT_ERROR_INTEG_ERROR,
+					       1);
+		  goto trace;
+		}
+
+	      /* transport mode */
+	      if (!sa0->is_tunnel)
+		{
+		  if (b0->flags & VNET_BUFFER_F_L3_HDR_OFFSET_VALID)
+		    {
+		      if (is_ip6)
+			{
+			  ip_hdr_size = sizeof (ip6_header_t);
+			}
+		      else
+			{
+			  ip_hdr_size = sizeof (ip4_header_t);
+			}
+		    }
+		  else
+		    {
+		      vlib_node_increment_counter (vm, node->node_index,
+						   ESP_DECRYPT_ERROR_NOT_IP,
+						   1);
+		      goto trace;
+		    }
+		}
+
+	      job->chain_order = HASH_CIPHER;
+	      job->cipher_direction = DECRYPT;
+	      job->src = (u8 *) esp0;
+	      job->dst = (u8 *) esp0;
+	      vlib_buffer_advance (b0, -ip_hdr_size);
+	      job->cipher_mode =
+		imbm->crypto_algs[sa0->crypto_alg].cipher_mode;
+	      job->aes_enc_key_expanded = samb0->aes_enc_key_expanded;
+	      job->aes_dec_key_expanded = samb0->aes_dec_key_expanded;
+	      job->aes_key_len_in_bytes = sa0->crypto_key_len;
+	      job->iv = esp0->data;
+	      job->iv_len_in_bytes = iv_size;
+	      job->msg_len_to_cipher_in_bytes = blocks * block_size;
+	      job->cipher_start_src_offset_in_bytes =
+		sizeof (esp_header_t) + iv_size;
+	      job->hash_start_src_offset_in_bytes = 0;
+
+	      job->user_data = (void *) (uintptr_t) bi0;
+	      job->user_data2 = sa0;
+	      b0->current_length =
+		(blocks * block_size) - sizeof (esp_footer_t) + ip_hdr_size;
+	      ASSERT ((u8 *) vlib_buffer_get_current (b0) +
+		      b0->current_length < job->auth_tag_output);
+	      b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
+
+	      job = IPSECMB_FUNC (submit_job) (mgr);
+	      ++packets_in_flight;
+
+	      if (!job)
+		{
+		  continue;
+		}
+
+	      --packets_in_flight;
+
+	      sa0 = job->user_data2;
+	      bi0 = (uintptr_t) job->user_data;
+	      b0 = vlib_get_buffer (vm, bi0);
+	      esp_finish_decrypt (vm, node, job, &next0, sa0, is_ip6);
+
+	    trace:
+	      to_next[0] = bi0;
+	      to_next += 1;
+	      n_left_to_next -= 1;
+
+	      if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+		{
+		  esp_decrypt_trace_t *tr =
+		    vlib_add_trace (vm, node, b0, sizeof (*tr));
+		  tr->crypto_alg = sa0->crypto_alg;
+		  tr->integ_alg = sa0->integ_alg;
+		}
+
+	      vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+					       n_left_to_next, bi0, next0);
+	    }
+	}
+
+      if (PREDICT_FALSE (n_left_from == 0 && packets_in_flight > 0))
+	{
+	  JOB_AES_HMAC *job = NULL;
+	  while (n_left_to_next > 0 && (job = IPSECMB_FUNC (flush_job) (mgr)))
+	    {
+	      --packets_in_flight;
+	      u32 bi0, next0;
+	      bi0 = (uintptr_t) job->user_data;
+	      vlib_buffer_t *i_b0 = vlib_get_buffer (vm, bi0);
+
+	      ipsec_sa_t *sa0 = job->user_data2;
+	      esp_finish_decrypt (vm, node, job, &next0, sa0, is_ip6);
+
+	      to_next[0] = bi0;
+	      to_next += 1;
+	      n_left_to_next -= 1;
+
+	      if (PREDICT_FALSE (i_b0->flags & VLIB_BUFFER_IS_TRACED))
+		{
+		  esp_decrypt_trace_t *tr =
+		    vlib_add_trace (vm, node, i_b0, sizeof (*tr));
+		  tr->crypto_alg = sa0->crypto_alg;
+		  tr->integ_alg = sa0->integ_alg;
+		}
+
+	      vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+					       n_left_to_next, bi0, next0);
+	    }
+	}
+
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+    }
+  vlib_node_increment_counter (vm, node->node_index,
+			       ESP_DECRYPT_ERROR_RX_PKTS,
+			       from_frame->n_vectors);
+
+  if (to_be_freed)
+    vlib_buffer_free (vm, to_be_freed, vec_len (to_be_freed));
+  vec_free (to_be_freed);
+  return from_frame->n_vectors;
+}
+
+VLIB_NODE_FN (esp4_decrypt_ipsecmb_node) (vlib_main_t * vm,
+					  vlib_node_runtime_t * node,
+					  vlib_frame_t * from_frame)
+{
+  return esp_decrypt_ipsecmb_inline (vm, node, from_frame, 0 /*is_ip6 */ );
+}
+
+VLIB_NODE_FN (esp6_decrypt_ipsecmb_node) (vlib_main_t * vm,
+					  vlib_node_runtime_t * node,
+					  vlib_frame_t * from_frame)
+{
+  return esp_decrypt_ipsecmb_inline (vm, node, from_frame, 1 /*is_ip6 */ );
+}
+#endif
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (esp4_decrypt_ipsecmb_node) = {
+  .name = "esp4-decrypt-ipsecmb",
+  .vector_size = sizeof (u32),
+  .format_trace = format_esp_decrypt_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
+  .error_strings = esp_decrypt_error_strings,
+
+  .n_next_nodes = ESP_DECRYPT_N_NEXT,
+  .next_nodes = {
+#define _(s,n) [ESP_DECRYPT_NEXT_##s] = n,
+    foreach_esp_decrypt_next
+#undef _
+  },
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (esp6_decrypt_ipsecmb_node) = {
+  .name = "esp6-decrypt-ipsecmb",
+  .vector_size = sizeof (u32),
+  .format_trace = format_esp_decrypt_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
+  .error_strings = esp_decrypt_error_strings,
+
+  .n_next_nodes = ESP_DECRYPT_N_NEXT,
+  .next_nodes = {
+#define _(s,n) [ESP_DECRYPT_NEXT_##s] = n,
+    foreach_esp_decrypt_next
+#undef _
+  },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/ipsecmb/esp_encrypt.c b/src/plugins/ipsecmb/esp_encrypt.c
new file mode 100644
index 00000000000..312471c6dcd
--- /dev/null
+++ b/src/plugins/ipsecmb/esp_encrypt.c
@@ -0,0 +1,651 @@
+/*
+ * esp_encrypt.c : ipsecmb ESP encrypt node
+ *
+ * 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 <vnet/vnet.h>
+#include <vnet/api_errno.h>
+#include <vnet/ip/ip.h>
+#include <vnet/udp/udp.h>
+
+#include <vnet/ipsec/ipsec.h>
+#include <vnet/ipsec/esp.h>
+
+#include <ipsecmb/ipsecmb.h>
+
+#define foreach_esp_encrypt_next \
+  _ (DROP, "error-drop")         \
+  _ (IP4_LOOKUP, "ip4-lookup")   \
+  _ (IP6_LOOKUP, "ip6-lookup")   \
+  _ (INTERFACE_OUTPUT, "interface-output")
+
+#define _(v, s) ESP_ENCRYPT_NEXT_##v,
+typedef enum
+{
+  foreach_esp_encrypt_next
+#undef _
+    ESP_ENCRYPT_N_NEXT,
+} esp_encrypt_next_t;
+
+#define foreach_esp_encrypt_error                \
+  _ (RX_PKTS, "ESP pkts received")               \
+  _ (NO_BUFFER, "No buffer (packet dropped)")    \
+  _ (DECRYPTION_FAILED, "ESP encryption failed") \
+  _ (SEQ_CYCLED, "sequence number cycled")
+
+typedef enum
+{
+#define _(sym, str) ESP_ENCRYPT_ERROR_##sym,
+  foreach_esp_encrypt_error
+#undef _
+    ESP_ENCRYPT_N_ERROR,
+} esp_encrypt_error_t;
+
+typedef struct
+{
+  u32 spi;
+  u32 seq;
+  u8 udp_encap;
+  ipsec_crypto_alg_t crypto_alg;
+  ipsec_integ_alg_t integ_alg;
+} esp_encrypt_trace_t;
+
+#ifdef CLIB_MARCH_VARIANT
+static inline void
+add_random_bytes_from_traffic (ipsecmb_main_t * imbm,
+			       u32 thread_index, void *from, u8 size)
+{
+  ASSERT (STRUCT_SIZE_OF (random_bytes_t, data) == size);
+  u32 idx;
+  random_bytes_t *rb;
+  ipsecmb_per_thread_data_t *t = &imbm->per_thread_data[thread_index];;
+  if (PREDICT_TRUE (vec_len (t->rb_recycle_list)))
+    {
+      idx = vec_pop (t->rb_recycle_list);
+      rb = pool_elt_at_index (t->rb_pool, idx);
+    }
+  else
+    {
+      pool_get (t->rb_pool, rb);
+      idx = rb - t->rb_pool;
+    }
+  clib_memcpy (rb->data, from, STRUCT_SIZE_OF (random_bytes_t, data));
+  vec_add1 (t->rb_from_traffic, idx);
+}
+
+static inline int
+random_bytes (ipsecmb_main_t * imbm, u32 thread_index, u8 * where, u8 size)
+{
+  ASSERT (STRUCT_SIZE_OF (random_bytes_t, data) == size);
+  const u8 block_size = STRUCT_SIZE_OF (random_bytes_t, data);
+  ipsecmb_per_thread_data_t *t = &imbm->per_thread_data[thread_index];;
+  if (PREDICT_TRUE (vec_len (t->rb_from_traffic)))
+    {
+      u32 idx = vec_pop (t->rb_from_traffic);
+      random_bytes_t *rb = pool_elt_at_index (t->rb_pool, idx);
+      clib_memcpy (where, rb->data, block_size);
+      vec_add1 (t->rb_recycle_list, idx);
+      return 0;
+    }
+  if (PREDICT_FALSE (0 == vec_len (t->rb_from_dev_urandom)))
+    {
+      ssize_t bytes_read = read (imbm->dev_urandom_fd, t->urandom_buffer,
+				 sizeof (t->urandom_buffer));
+      if (bytes_read < 0)
+	{
+	  clib_unix_warning ("read() from /dev/urandom failed");
+	  return -1;
+	}
+      if (bytes_read < block_size)
+	{
+	  clib_unix_warning
+	    ("read() from /dev/urandom produced only %zd bytes", bytes_read);
+	  return -1;
+	}
+      const ssize_t limit = clib_min (bytes_read, sizeof (t->urandom_buffer));
+      int i;
+      for (i = 0; limit - i >= block_size && vec_len (t->rb_recycle_list) > 0;
+	   i += block_size)
+	{
+	  u32 idx = vec_pop (t->rb_recycle_list);
+	  random_bytes_t *rb = pool_elt_at_index (t->rb_pool, idx);
+	  clib_memcpy (rb->data, t->urandom_buffer + i, block_size);
+	  vec_add1 (t->rb_from_dev_urandom, idx);
+	}
+      for (; limit - i >= block_size; i += block_size)
+	{
+	  random_bytes_t *rb;
+	  pool_get (t->rb_pool, rb);
+	  clib_memcpy (rb->data, t->urandom_buffer + i, block_size);
+	  vec_add1 (t->rb_from_dev_urandom, rb - t->rb_pool);
+	}
+    }
+  u32 idx = vec_pop (t->rb_from_dev_urandom);
+  random_bytes_t *rb = pool_elt_at_index (t->rb_pool, idx);
+  clib_memcpy (where, rb->data, block_size);
+  vec_add1 (t->rb_recycle_list, idx);
+  return 0;
+}
+
+static inline void
+esp_finish_encrypt (vlib_main_t * vm, JOB_AES_HMAC * job,
+		    ipsecmb_main_t * imbm, int thread_index,
+		    u32 * bi0, u32 * next0, ipsec_sa_t ** sa0, int is_ip6)
+{
+  ip4_header_t *oh4 = 0;
+  udp_header_t *udp = 0;
+  ip6_header_t *oh6 = 0;
+  ipsec_main_t *im = &ipsec_main;
+  *bi0 = (uintptr_t) job->user_data;
+  vlib_buffer_t *b0 = vlib_get_buffer (vm, *bi0);
+  u32 sa_index0 = vnet_buffer (b0)->ipsec.sad_index;
+  *sa0 = pool_elt_at_index (im->sad, sa_index0);
+  oh4 = vlib_buffer_get_current (b0);
+  oh6 = vlib_buffer_get_current (b0);
+  if (is_ip6)
+    {
+      oh6->payload_length =
+	clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) -
+			      sizeof (ip6_header_t));
+    }
+  else
+    {
+      oh4->length =
+	clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
+      oh4->checksum = ip4_header_checksum (oh4);
+      if ((*sa0)->udp_encap)
+	{
+	  udp = (udp_header_t *) (oh4 + 1);
+	  udp->length =
+	    clib_host_to_net_u16 (clib_net_to_host_u16 (oh4->length) -
+				  ip4_header_bytes (oh4));
+	}
+    }
+
+  *next0 = (uintptr_t) job->user_data2;
+  const int iv_size = imbm->crypto_algs[(*sa0)->crypto_alg].iv_size;
+  add_random_bytes_from_traffic (imbm, thread_index,
+				 vlib_buffer_get_current (b0) +
+				 b0->current_length - iv_size, iv_size);
+  if (!(*sa0)->is_tunnel)
+    {
+      *next0 = ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT;
+      vlib_buffer_advance (b0, -sizeof (ethernet_header_t));
+    }
+}
+
+always_inline void
+ipsemb_ip4_fill_comon_values (ip4_header_t * oh4, u8 tos)
+{
+  oh4->ip_version_and_header_length = 0x45;
+  oh4->tos = tos;
+  oh4->fragment_id = 0;
+  oh4->flags_and_fragment_offset = 0;
+  oh4->ttl = 254;
+}
+
+always_inline void
+ipsemb_handle_udp_encap (ipsec_sa_t * sa0, esp_header_t ** esp,
+			 ip4_header_t ** oh4)
+{
+  if (sa0->udp_encap)
+    {
+      *esp = (esp_header_t *) ((u8 *) esp + sizeof (udp_header_t));
+      udp_header_t *udp = (udp_header_t *) ((*oh4) + 1);
+      udp->src_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
+      udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
+      udp->checksum = 0;
+      (*oh4)->protocol = IP_PROTOCOL_UDP;
+    }
+  else
+    {
+      (*oh4)->protocol = IP_PROTOCOL_IPSEC_ESP;
+    }
+}
+
+always_inline void
+esp_prepare_tunneL_headers (vlib_buffer_t * b0, ipsec_sa_t * sa0, u32 * next0,
+			    u8 * next_hdr_type, ip4_header_t * ih4,
+			    ip4_header_t ** oh4, ip6_header_t * ih6,
+			    ip6_header_t ** oh6, esp_header_t ** esp,
+			    u32 iv_size, int is_ip6)
+{
+  if (is_ip6)
+    {
+      *next0 = ESP_ENCRYPT_NEXT_IP6_LOOKUP;
+      *next_hdr_type = IP_PROTOCOL_IPV6;
+      *oh6 = (ip6_header_t *) ((u8 *) ih6 - sizeof (esp_header_t) -
+			       sizeof (ip6_header_t) - iv_size);
+      (*oh6)->src_address.as_u64[0] = sa0->tunnel_src_addr.ip6.as_u64[0];
+      (*oh6)->src_address.as_u64[1] = sa0->tunnel_src_addr.ip6.as_u64[1];
+      (*oh6)->dst_address.as_u64[0] = sa0->tunnel_dst_addr.ip6.as_u64[0];
+      (*oh6)->dst_address.as_u64[1] = sa0->tunnel_dst_addr.ip6.as_u64[1];
+
+      vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+      vlib_buffer_advance (b0, -(sizeof (esp_header_t) +
+				 sizeof (ip6_header_t) + iv_size));
+      (*oh6)->ip_version_traffic_class_and_flow_label =
+	ih6->ip_version_traffic_class_and_flow_label;
+      (*oh6)->protocol = IP_PROTOCOL_IPSEC_ESP;
+      (*oh6)->hop_limit = 254;
+      *esp = (esp_header_t *) ((*oh6) + 1);
+    }
+  else
+    {				/* is ipv4 */
+      *next0 = ESP_ENCRYPT_NEXT_IP4_LOOKUP;
+      u32 udp_hdr_size = 0;
+      if (sa0->udp_encap)
+	{
+	  udp_hdr_size = sizeof (udp_header_t);
+	}
+      *next_hdr_type = IP_PROTOCOL_IP_IN_IP;
+      (*oh4) =
+	(ip4_header_t *) (((u8 *) ih4) - sizeof (ip4_header_t) -
+			  sizeof (esp_header_t) - udp_hdr_size - iv_size);
+      (*oh4)->src_address.as_u32 = sa0->tunnel_src_addr.ip4.as_u32;
+      (*oh4)->dst_address.as_u32 = sa0->tunnel_dst_addr.ip4.as_u32;
+      vlib_buffer_advance (b0, -(sizeof (ip4_header_t) +
+				 sizeof (esp_header_t) +
+				 udp_hdr_size + iv_size));
+      vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+      *esp = (esp_header_t *) ((*oh4) + 1);
+
+      ipsemb_ip4_fill_comon_values (*oh4, ih4->tos);
+      ipsemb_handle_udp_encap (sa0, esp, oh4);
+    }
+}
+
+always_inline void
+esp_prepare_transport_headers (vlib_buffer_t * b0, ipsec_sa_t * sa0,
+			       u32 * next0, u8 * next_hdr_type,
+			       ip4_header_t * ih4, ip4_header_t ** oh4,
+			       ip6_header_t * ih6, ip6_header_t ** oh6,
+			       esp_header_t ** esp, u32 iv_size, int is_ip6)
+{
+  if (is_ip6)
+    {
+      *next0 = ESP_ENCRYPT_NEXT_IP6_LOOKUP;
+      *next_hdr_type = ih6->protocol;
+      (*oh6) = (ip6_header_t *) ((u8 *) ih6 - sizeof (esp_header_t) -
+				 iv_size);
+      if (vnet_buffer (b0)->sw_if_index[VLIB_TX] != ~0)
+	{
+	  ethernet_header_t *ieh0, *oeh0;
+	  ieh0 = (ethernet_header_t *) vlib_buffer_get_current (b0) - 1;
+	  oeh0 = (ethernet_header_t *) (*oh6) - 1;
+	  clib_memcpy (oeh0, ieh0, sizeof (ethernet_header_t));
+	}
+      (*oh6)->src_address.as_u64[0] = ih6->src_address.as_u64[0];
+      (*oh6)->src_address.as_u64[1] = ih6->src_address.as_u64[1];
+      (*oh6)->dst_address.as_u64[0] = ih6->dst_address.as_u64[0];
+      (*oh6)->dst_address.as_u64[1] = ih6->dst_address.as_u64[1];
+      vlib_buffer_advance (b0, -(sizeof (esp_header_t) + iv_size));
+      (*oh6)->ip_version_traffic_class_and_flow_label =
+	ih6->ip_version_traffic_class_and_flow_label;
+      (*oh6)->protocol = IP_PROTOCOL_IPSEC_ESP;
+      (*oh6)->hop_limit = 254;
+      *esp = (esp_header_t *) ((*oh6) + 1);
+    }
+  else
+    {				/* is ipv4 */
+      *next0 = ESP_ENCRYPT_NEXT_IP4_LOOKUP;
+      u32 udp_hdr_size = 0;
+      if (sa0->udp_encap)
+	{
+	  udp_hdr_size = sizeof (udp_header_t);
+	}
+      *next_hdr_type = ih4->protocol;
+      (*oh4) = (ip4_header_t *) (((u8 *) ih4) - sizeof (esp_header_t) -
+				 udp_hdr_size - iv_size);
+      if (vnet_buffer (b0)->sw_if_index[VLIB_TX] != ~0)
+	{
+	  ethernet_header_t *ieh0, *oeh0;
+	  ieh0 = (ethernet_header_t *) vlib_buffer_get_current (b0) - 1;
+	  oeh0 = (ethernet_header_t *) (*oh4) - 1;
+	  clib_memcpy (oeh0, ieh0, sizeof (ethernet_header_t));
+	}
+      (*oh4)->src_address.as_u32 = ih4->src_address.as_u32;
+      (*oh4)->dst_address.as_u32 = ih4->dst_address.as_u32;
+      vlib_buffer_advance (b0,
+			   -(sizeof (esp_header_t) + udp_hdr_size + iv_size));
+      *esp = (esp_header_t *) ((*oh4) + 1);
+
+      ipsemb_ip4_fill_comon_values (*oh4, ih4->tos);
+      ipsemb_handle_udp_encap (sa0, esp, oh4);
+    }
+}
+
+static uword
+esp_encrypt_ipsecmb_inline (vlib_main_t * vm,
+			    vlib_node_runtime_t * node,
+			    vlib_frame_t * from_frame, int is_ip6)
+{
+  u32 n_left_from, *from, *to_next = 0, next_index;
+  from = vlib_frame_vector_args (from_frame);
+  n_left_from = from_frame->n_vectors;
+  ipsecmb_main_t *imbm = &ipsecmb_main;
+  ipsec_main_t *im = &ipsec_main;
+  u32 packets_in_flight = 0;
+  next_index = node->cached_next_index;
+  u32 thread_index = vlib_get_thread_index ();
+  ipsec_alloc_empty_buffers (vm, im);
+  u32 *to_be_freed = NULL;
+  ipsecmb_per_thread_data_t *t = &imbm->per_thread_data[thread_index];;
+
+  MB_MGR *mgr = imbm->mb_mgr[thread_index];
+
+  while (n_left_from > 0 || packets_in_flight > 0)
+    {
+      u32 n_left_to_next;
+
+      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  u32 bi0, next0;
+	  vlib_buffer_t *b0 = 0;
+	  u32 sa_index0;
+	  ipsec_sa_t *sa0;
+	  ipsecmb_sa_t *samb0;
+	  ip4_header_t *ih4, *oh4 = 0;
+	  ip6_header_t *ih6, *oh6 = 0;
+	  esp_header_t *esp;
+	  u8 next_hdr_type;
+
+	  bi0 = from[0];
+	  from += 1;
+	  n_left_from -= 1;
+
+	  next0 = ESP_ENCRYPT_NEXT_DROP;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+	  sa_index0 = vnet_buffer (b0)->ipsec.sad_index;
+	  sa0 = pool_elt_at_index (im->sad, sa_index0);
+	  samb0 = pool_elt_at_index (imbm->sad, sa_index0);
+
+	  if (esp_seq_advance (sa0))
+	    {
+	      clib_warning ("sequence number counter has cycled SPI %u",
+			    sa0->spi);
+	      vlib_node_increment_counter (vm, node->node_index,
+					   ESP_ENCRYPT_ERROR_SEQ_CYCLED, 1);
+	      // TODO: rekey SA
+	      to_next[0] = bi0;
+	      to_next += 1;
+	      goto trace;
+	    }
+
+	  sa0->total_data_size += b0->current_length;
+
+	  if (PREDICT_FALSE (b0->n_add_refs > 0))
+	    {
+	      vec_add1 (to_be_freed, bi0);
+	      b0 = vlib_buffer_copy (vm, b0);
+	      bi0 = vlib_get_buffer_index (vm, b0);
+	    }
+
+	  ih4 = vlib_buffer_get_current (b0);
+	  ih6 = vlib_buffer_get_current (b0);
+
+	  const int iv_size = imbm->crypto_algs[sa0->crypto_alg].iv_size;
+	  if (sa0->is_tunnel)
+	    esp_prepare_tunneL_headers (b0, sa0, &next0, &next_hdr_type, ih4,
+					&oh4, ih6, &oh6, &esp, iv_size,
+					is_ip6);
+	  else
+	    esp_prepare_transport_headers (b0, sa0, &next0, &next_hdr_type,
+					   ih4, &oh4, ih6, &oh6, &esp,
+					   iv_size, is_ip6);
+
+
+	  esp->spi = clib_net_to_host_u32 (sa0->spi);
+	  esp->seq = clib_net_to_host_u32 (sa0->seq);
+	  ASSERT (sa0->crypto_alg < IPSEC_CRYPTO_N_ALG);
+
+	  esp_footer_t *f0;
+	  const u32 payload_offset =
+	    (u8 *) (esp + 1) + iv_size - (u8 *) vlib_buffer_get_current (b0);
+	  JOB_AES_HMAC *job = IPSECMB_FUNC (get_next_job) (mgr);
+	  if (PREDICT_TRUE (sa0->crypto_alg != IPSEC_CRYPTO_ALG_NONE))
+	    {
+	      const int block_size =
+		imbm->crypto_algs[sa0->crypto_alg].block_size;
+	      u32 payload_length = b0->current_length - payload_offset;
+	      int blocks = 1 + (payload_length + 1) / block_size;
+
+	      /* pad packet in input buffer */
+	      u8 pad_bytes =
+		block_size * blocks - sizeof (esp_footer_t) - payload_length;
+	      u8 i;
+	      u8 *padding = vlib_buffer_get_current (b0) + b0->current_length;
+	      b0->current_length = payload_offset + block_size * blocks;
+	      for (i = 0; i < pad_bytes; ++i)
+		{
+		  padding[i] = i + 1;
+		}
+	      f0 = vlib_buffer_get_current (b0) + b0->current_length -
+		sizeof (esp_footer_t);
+	      f0->pad_length = pad_bytes;
+	      f0->next_header = next_hdr_type;
+
+	      random_bytes (imbm, thread_index, (u8 *) (esp + 1), iv_size);
+	      job->iv = (u8 *) (esp + 1);
+	      job->iv_len_in_bytes = iv_size;
+	    }
+
+	  job->chain_order = CIPHER_HASH;
+	  job->cipher_direction = ENCRYPT;
+	  job->src = (u8 *) esp;
+	  job->dst = (u8 *) ((u8 *) (esp + 1) + iv_size);
+	  job->cipher_mode = imbm->crypto_algs[sa0->crypto_alg].cipher_mode;
+	  job->aes_enc_key_expanded = samb0->aes_enc_key_expanded;
+	  job->aes_dec_key_expanded = samb0->aes_dec_key_expanded;
+	  job->aes_key_len_in_bytes = sa0->crypto_key_len;
+	  job->cipher_start_src_offset_in_bytes =
+	    sizeof (esp_header_t) + iv_size;
+	  job->hash_start_src_offset_in_bytes = 0;
+	  job->msg_len_to_cipher_in_bytes =
+	    b0->current_length - payload_offset;
+	  if (PREDICT_TRUE (IPSEC_INTEG_ALG_NONE != sa0->integ_alg))
+	    {
+	      if (sa0->use_esn)
+		{
+		  *(u32 *) (vlib_buffer_get_current (b0) +
+			    b0->current_length) = sa0->seq_hi;
+		  b0->current_length += sizeof (u32);
+		}
+	      job->msg_len_to_hash_in_bytes = b0->current_length -
+		payload_offset + sizeof (esp_header_t) + iv_size;
+	      job->u.HMAC._hashed_auth_key_xor_ipad = samb0->ipad_hash;
+	      job->u.HMAC._hashed_auth_key_xor_opad = samb0->opad_hash;
+	      job->auth_tag_output =
+		vlib_buffer_get_current (b0) + b0->current_length;
+	      job->auth_tag_output_len_in_bytes =
+		imbm->integ_algs[sa0->integ_alg].hash_output_length;
+	      b0->current_length +=
+		imbm->integ_algs[sa0->integ_alg].hash_output_length;
+	    }
+	  job->hash_alg = imbm->integ_algs[sa0->integ_alg].hash_alg;
+	  job->user_data = (void *) (uintptr_t) bi0;
+	  job->user_data2 = (void *) (uintptr_t) next0;
+	  job = IPSECMB_FUNC (submit_job) (mgr);
+	  ++packets_in_flight;
+
+	  if (!job)
+	    {
+	      continue;
+	    }
+
+	  --packets_in_flight;
+	  esp_finish_encrypt (vm, job, imbm, thread_index, &bi0, &next0, &sa0,
+			      is_ip6);
+
+	  to_next[0] = bi0;
+	  to_next += 1;
+	  n_left_to_next -= 1;
+
+	trace:
+	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+	    {
+	      esp_encrypt_trace_t *tr =
+		vlib_add_trace (vm, node, b0, sizeof (*tr));
+	      tr->spi = sa0->spi;
+	      tr->seq = sa0->seq - 1;
+	      tr->udp_encap = sa0->udp_encap;
+	      tr->crypto_alg = sa0->crypto_alg;
+	      tr->integ_alg = sa0->integ_alg;
+	    }
+
+	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+					   n_left_to_next, bi0, next0);
+	}
+
+      if (PREDICT_FALSE (n_left_from == 0))
+	{
+	  JOB_AES_HMAC *job = NULL;
+	  while (n_left_to_next > 0 && (job = IPSECMB_FUNC (flush_job) (mgr)))
+	    {
+	      --packets_in_flight;
+	      u32 bi0, next0;
+	      vlib_buffer_t *b0;
+	      ipsec_sa_t *sa0;
+
+	      esp_finish_encrypt (vm, job, imbm, thread_index, &bi0, &next0,
+				  &sa0, is_ip6);
+	      b0 = vlib_get_buffer (vm, bi0);
+
+	      to_next[0] = bi0;
+	      to_next += 1;
+	      n_left_to_next -= 1;
+
+	      if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+		{
+		  esp_encrypt_trace_t *tr =
+		    vlib_add_trace (vm, node, b0, sizeof (*tr));
+		  tr->spi = sa0->spi;
+		  tr->seq = sa0->seq - 1;
+		  tr->udp_encap = sa0->udp_encap;
+		  tr->crypto_alg = sa0->crypto_alg;
+		  tr->integ_alg = sa0->integ_alg;
+		}
+
+	      vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+					       n_left_to_next, bi0, next0);
+	    }
+	}
+
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+    }
+  vlib_node_increment_counter (vm, node->node_index,
+			       ESP_ENCRYPT_ERROR_RX_PKTS,
+			       from_frame->n_vectors);
+
+  if (to_be_freed)
+    vlib_buffer_free (vm, to_be_freed, vec_len (to_be_freed));
+  vec_free (to_be_freed);
+  if (PREDICT_TRUE (vec_len (t->rb_from_traffic) > 0))
+    {
+      /* recycle traffic generated buffers, because once the packets are sent
+       * out, bytes from these packets are no longer unpredictable */
+      vec_add (t->rb_recycle_list, t->rb_from_traffic,
+	       vec_len (t->rb_from_traffic));
+      _vec_len (t->rb_from_traffic) = 0;
+    }
+  return from_frame->n_vectors;
+}
+
+VLIB_NODE_FN (esp4_encrypt_ipsecmb_node) (vlib_main_t * vm,
+					  vlib_node_runtime_t * node,
+					  vlib_frame_t * from_frame)
+{
+  return esp_encrypt_ipsecmb_inline (vm, node, from_frame, 0 /*is_ip6 */ );
+}
+
+VLIB_NODE_FN (esp6_encrypt_ipsecmb_node) (vlib_main_t * vm,
+					  vlib_node_runtime_t * node,
+					  vlib_frame_t * from_frame)
+{
+  return esp_encrypt_ipsecmb_inline (vm, node, from_frame, 1 /*is_ip6 */ );
+}
+#endif
+
+static char *esp_encrypt_error_strings[] = {
+#define _(sym, string) string,
+  foreach_esp_encrypt_error
+#undef _
+};
+
+/* packet trace format function */
+static u8 *
+format_esp_encrypt_trace (u8 * s, va_list * args)
+{
+  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+  esp_encrypt_trace_t *t = va_arg (*args, esp_encrypt_trace_t *);
+
+  s =
+    format (s, "esp: spi %u seq %u crypto %U integrity %U%s", t->spi, t->seq,
+	    format_ipsec_crypto_alg, t->crypto_alg, format_ipsec_integ_alg,
+	    t->integ_alg, t->udp_encap ? " udp-encap-enabled" : "");
+  return s;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (esp4_encrypt_ipsecmb_node) = {
+    .name = "esp4-encrypt-ipsecmb",
+    .vector_size = sizeof (u32),
+    .format_trace = format_esp_encrypt_trace,
+    .type = VLIB_NODE_TYPE_INTERNAL,
+
+    .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
+    .error_strings = esp_encrypt_error_strings,
+
+    .n_next_nodes = ESP_ENCRYPT_N_NEXT,
+    .next_nodes =
+        {
+#define _(s, n) [ESP_ENCRYPT_NEXT_##s] = n,
+            foreach_esp_encrypt_next
+#undef _
+        },
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (esp6_encrypt_ipsecmb_node) = {
+    .name = "esp6-encrypt-ipsecmb",
+    .vector_size = sizeof (u32),
+    .format_trace = format_esp_encrypt_trace,
+    .type = VLIB_NODE_TYPE_INTERNAL,
+
+    .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
+    .error_strings = esp_encrypt_error_strings,
+
+    .n_next_nodes = ESP_ENCRYPT_N_NEXT,
+    .next_nodes =
+        {
+#define _(s, n) [ESP_ENCRYPT_NEXT_##s] = n,
+            foreach_esp_encrypt_next
+#undef _
+        },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/ipsecmb/ipsecmb.c b/src/plugins/ipsecmb/ipsecmb.c
new file mode 100644
index 00000000000..17b8fb8ce3d
--- /dev/null
+++ b/src/plugins/ipsecmb/ipsecmb.c
@@ -0,0 +1,322 @@
+/*
+ * init.c : ipsecmb common code
+ *
+ * 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 <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <vnet/plugin/plugin.h>
+#include <vpp/app/version.h>
+#include <ipsecmb/ipsecmb.h>
+ipsecmb_main_t ipsecmb_main;
+
+int
+sa_expand_keys (u32 sa_index)
+{
+  ipsecmb_main_t *imbm = &ipsecmb_main;
+  ipsec_sa_t *sa = pool_elt_at_index (ipsec_main.sad, sa_index);
+  ipsecmb_sa_t *samb = pool_elt_at_index (imbm->sad, sa_index);
+  if (sa->crypto_key_len > 0)
+    {
+      const keyexp_t keyexp_fn = imbm->crypto_algs[sa->crypto_alg].keyexp_fn;
+      keyexp_fn (sa->crypto_key, samb->aes_enc_key_expanded,
+		 samb->aes_dec_key_expanded);
+    }
+  if (sa->integ_key_len > 0)
+    {
+      const u8 block_size = imbm->integ_algs[sa->integ_alg].block_size;
+      const hash_one_block_t hash_one_block_fn =
+	imbm->integ_algs[sa->integ_alg].hash_one_block_fn;
+      u8 buf[block_size];
+      int i = 0;
+      if (sa->integ_key_len > block_size)
+	{
+	  return VNET_API_ERROR_SYSCALL_ERROR_1;	// FIXME use correct value
+	}
+      memset (buf, 0x36, sizeof (buf));
+      for (i = 0; i < sa->integ_key_len; i++)
+	{
+	  buf[i] ^= sa->integ_key[i];
+	}
+      hash_one_block_fn (buf, samb->ipad_hash);
+
+      memset (buf, 0x5c, sizeof (buf));
+      for (i = 0; i < sa->integ_key_len; i++)
+	{
+	  buf[i] ^= sa->integ_key[i];
+	}
+      hash_one_block_fn (buf, samb->opad_hash);
+    }
+  return 0;
+}
+
+static clib_error_t *
+ipsecmb_add_del_sa_session (u32 sa_index, u8 is_add)
+{
+  ipsecmb_main_t *imbm = &ipsecmb_main;
+  if (is_add)
+    {
+      ipsecmb_sa_t *samb = NULL;
+      pool_get (imbm->sad, samb);
+      ASSERT (samb == pool_elt_at_index (imbm->sad, sa_index));
+      sa_expand_keys (sa_index);
+    }
+  else
+    {
+      pool_put_index (imbm->sad, sa_index);
+    }
+  return 0;
+}
+
+clib_error_t *
+ipsecmb_check_esp_support (ipsec_sa_t * sa)
+{
+  switch (sa->crypto_alg)
+    {
+    case IPSEC_CRYPTO_ALG_NONE:
+      break;
+    case IPSEC_CRYPTO_ALG_DES_CBC:
+    case IPSEC_CRYPTO_ALG_3DES_CBC:
+      return clib_error_return (0, "unsupported (3)des crypto-alg");
+    case IPSEC_CRYPTO_ALG_AES_CBC_128:
+    case IPSEC_CRYPTO_ALG_AES_CBC_192:
+    case IPSEC_CRYPTO_ALG_AES_CBC_256:
+      break;
+    case IPSEC_CRYPTO_ALG_AES_CTR_128:
+    case IPSEC_CRYPTO_ALG_AES_CTR_192:
+    case IPSEC_CRYPTO_ALG_AES_CTR_256:
+      return clib_error_return (0, "unsupported aes-ctr crypto-alg");
+    case IPSEC_CRYPTO_ALG_AES_GCM_128:
+    case IPSEC_CRYPTO_ALG_AES_GCM_192:
+    case IPSEC_CRYPTO_ALG_AES_GCM_256:
+      return clib_error_return (0, "unsupported aes-gcm crypto-alg");
+    case IPSEC_CRYPTO_N_ALG:
+      return clib_error_return (0, "invalid crypto-alg");
+    }
+
+  switch (sa->integ_alg)
+    {
+    case IPSEC_INTEG_ALG_NONE:
+      return clib_error_return (0, "unsupported none integ-alg");
+    case IPSEC_INTEG_ALG_MD5_96:
+      return clib_error_return (0, "unsupported md5 integ-alg");
+    case IPSEC_INTEG_ALG_SHA1_96:
+    case IPSEC_INTEG_ALG_SHA_256_96:
+    case IPSEC_INTEG_ALG_SHA_256_128:
+    case IPSEC_INTEG_ALG_SHA_384_192:
+    case IPSEC_INTEG_ALG_SHA_512_256:
+      break;
+    case IPSEC_INTEG_N_ALG:
+      return clib_error_return (0, "invalid integ-alg");
+    }
+  return 0;
+}
+
+clib_error_t *
+ipsecmb_check_ah_support (ipsec_sa_t * sa)
+{
+  switch (sa->integ_alg)
+    {
+    case IPSEC_INTEG_ALG_NONE:
+      return clib_error_return (0, "unsupported none integ-alg");
+    case IPSEC_INTEG_ALG_MD5_96:
+      return clib_error_return (0, "unsupported md5 integ-alg");
+    case IPSEC_INTEG_ALG_SHA1_96:
+    case IPSEC_INTEG_ALG_SHA_256_96:
+    case IPSEC_INTEG_ALG_SHA_256_128:
+    case IPSEC_INTEG_ALG_SHA_384_192:
+    case IPSEC_INTEG_ALG_SHA_512_256:
+      break;
+    case IPSEC_INTEG_N_ALG:
+      return clib_error_return (0, "invalid integ-alg");
+    }
+  return 0;
+}
+
+static clib_error_t *
+ipsecmb_init (vlib_main_t * vm)
+{
+  ipsecmb_main_t *imbm = &ipsecmb_main;
+  imbm->dev_urandom_fd = open ("/dev/urandom", O_RDONLY);
+  if (!imbm->dev_urandom_fd)
+    {
+      return clib_error_return_unix_fatal (0,
+					   "Can't open /dev/urandom for read");
+    }
+
+  vlib_thread_main_t *tm = vlib_get_thread_main ();
+
+  imbm->crypto_algs = NULL;
+  imbm->integ_algs = NULL;
+
+  vec_validate (imbm->crypto_algs, IPSEC_CRYPTO_N_ALG - 1);
+  vec_validate (imbm->integ_algs, IPSEC_INTEG_N_ALG - 1);
+  imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_128].block_size = 16;
+  imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_192].block_size = 16;
+  imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_256].block_size = 16;
+  imbm->crypto_algs[IPSEC_CRYPTO_ALG_DES_CBC].block_size = 8;
+  imbm->crypto_algs[IPSEC_CRYPTO_ALG_3DES_CBC].block_size = 8;
+  imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_128].iv_size = 16;
+  imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_192].iv_size = 16;
+  imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_256].iv_size = 16;
+  imbm->crypto_algs[IPSEC_CRYPTO_ALG_DES_CBC].iv_size = 8;
+  imbm->crypto_algs[IPSEC_CRYPTO_ALG_3DES_CBC].iv_size = 8;
+  imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_128].cipher_mode = CBC;
+  imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_192].cipher_mode = CBC;
+  imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_256].cipher_mode = CBC;
+
+  ipsecmb_integ_alg_t *i;
+  i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA1_96];
+  i->hash_alg = SHA1;
+  i->block_size = SHA1_BLOCK_SIZE;
+
+  i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA_256_96];
+  i->hash_alg = SHA_256;
+  i->block_size = SHA_256_BLOCK_SIZE;
+
+  i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA_256_128];
+  i->hash_alg = SHA_256;
+  i->block_size = SHA_256_BLOCK_SIZE;
+
+  i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA_384_192];
+  i->hash_alg = SHA_384;
+  i->block_size = SHA_384_BLOCK_SIZE;
+
+  i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA_512_256];
+  i->hash_alg = SHA_512;
+  i->block_size = SHA_512_BLOCK_SIZE;
+
+  vec_validate (imbm->mb_mgr, tm->n_vlib_mains - 1);
+  MB_MGR **mgr;
+#define __set_funcs(arch)                                               \
+  do                                                                    \
+    {                                                                   \
+      imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_128].keyexp_fn =       \
+          aes_keyexp_128_##arch;                                        \
+      imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_192].keyexp_fn =       \
+          aes_keyexp_192_##arch;                                        \
+      imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_256].keyexp_fn =       \
+          aes_keyexp_256_##arch;                                        \
+      imbm->integ_algs[IPSEC_INTEG_ALG_SHA1_96].hash_one_block_fn =     \
+          sha1_one_block_##arch;                                        \
+      imbm->integ_algs[IPSEC_INTEG_ALG_SHA_256_96].hash_one_block_fn =  \
+          sha256_one_block_##arch;                                      \
+      imbm->integ_algs[IPSEC_INTEG_ALG_SHA_256_128].hash_one_block_fn = \
+          sha256_one_block_##arch;                                      \
+      imbm->integ_algs[IPSEC_INTEG_ALG_SHA_384_192].hash_one_block_fn = \
+          sha384_one_block_##arch;                                      \
+      imbm->integ_algs[IPSEC_INTEG_ALG_SHA_512_256].hash_one_block_fn = \
+          sha512_one_block_##arch;                                      \
+    }                                                                   \
+  while (0);
+
+  if (clib_cpu_supports_avx512f ())
+    {
+      __set_funcs (avx512);
+      vec_foreach (mgr, imbm->mb_mgr)
+      {
+	*mgr = alloc_mb_mgr (0);
+	init_mb_mgr_avx512 (*mgr);
+      }
+    }
+  else if (clib_cpu_supports_avx2 ())
+    {
+      __set_funcs (avx2);
+      vec_foreach (mgr, imbm->mb_mgr)
+      {
+	*mgr = alloc_mb_mgr (0);
+	init_mb_mgr_avx2 (*mgr);
+      }
+    }
+  else
+    {
+      __set_funcs (sse);
+      vec_foreach (mgr, imbm->mb_mgr)
+      {
+	*mgr = alloc_mb_mgr (0);
+	init_mb_mgr_sse (*mgr);
+      }
+    }
+#undef __set_funcs
+
+
+  i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA1_96];
+  i->hash_output_length = 12;
+
+  i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA_256_96];
+  i->hash_output_length = 12;
+
+  i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA_256_128];
+  i->hash_output_length = 16;
+
+  i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA_384_192];
+  i->hash_output_length = 24;
+
+  i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA_512_256];
+  i->hash_output_length = 32;
+
+  vec_validate (imbm->per_thread_data, tm->n_vlib_mains - 1);
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (ipsecmb_init);
+
+static uword
+ipsecmb_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
+{
+  ipsec_main_t *im = &ipsec_main;
+  ipsec_register_ah_backend (vm, im, "ipsecmb backend",
+			     "ah4-encrypt-ipsecmb",
+			     "ah4-decrypt-ipsecmb",
+			     "ah6-encrypt-ipsecmb",
+			     "ah6-decrypt-ipsecmb",
+			     ipsecmb_check_ah_support,
+			     ipsecmb_add_del_sa_session);
+
+  ipsec_register_esp_backend (vm, im, "ipsecmb backend",
+			      "esp4-encrypt-ipsecmb",
+			      "esp4-decrypt-ipsecmb",
+			      "esp6-encrypt-ipsecmb",
+			      "esp6-decrypt-ipsecmb",
+			      ipsecmb_check_esp_support,
+			      ipsecmb_add_del_sa_session);
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ipsecmb_process_node, static) = {
+    .function = ipsecmb_process,
+    .type = VLIB_NODE_TYPE_PROCESS,
+    .name = "ipsecmb-process",
+    .process_log2_n_stack_bytes = 17,
+};
+
+/* *INDENT-OFF* */
+VLIB_PLUGIN_REGISTER () = {
+    .version = VPP_BUILD_VER,
+    .description = "IPsecMB plugin",
+    .default_disabled = 1,
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/ipsecmb/ipsecmb.h b/src/plugins/ipsecmb/ipsecmb.h
new file mode 100644
index 00000000000..23e7ede9e99
--- /dev/null
+++ b/src/plugins/ipsecmb/ipsecmb.h
@@ -0,0 +1,97 @@
+#ifndef __included_ipsecmb_h__
+#define __included_ipsecmb_h__
+
+#include <vppinfra/types.h>
+#include <vppinfra/vec.h>
+#include <vppinfra/clib.h>
+#include <vppinfra/warnings.h>
+#include <vnet/ipsec/ipsec.h>
+
+WARN_OFF (attributes);
+
+#ifdef always_inline
+#undef always_inline
+#define __need_redefine__
+#endif
+
+#include <intel-ipsec-mb.h>
+
+#ifdef __need_redefine__
+#if CLIB_DEBUG > 0
+#define always_inline static inline
+#else
+#define always_inline static inline __attribute__ ((__always_inline__))
+#endif
+#endif // __need_redefine__
+WARN_ON (attributes);
+
+typedef struct
+{
+  keyexp_t keyexp_fn;
+  JOB_CIPHER_MODE cipher_mode;
+  u8 key_len;
+  u8 iv_size;
+  u8 block_size;
+} ipsecmb_crypto_alg_t;
+
+typedef struct
+{
+  hash_one_block_t hash_one_block_fn;
+  u8 block_size;
+  JOB_HASH_ALG hash_alg;
+  u8 hash_output_length;
+} ipsecmb_integ_alg_t;
+
+typedef struct
+{
+  u8 aes_enc_key_expanded[16 * 15] __attribute__ ((aligned (16)));
+  u8 aes_dec_key_expanded[16 * 15] __attribute__ ((aligned (16)));
+  u8 ipad_hash[256] __attribute__ ((aligned (16)));
+  u8 opad_hash[256] __attribute__ ((aligned (16)));
+} ipsecmb_sa_t;
+
+typedef struct
+{
+  u8 data[16];
+} random_bytes_t;
+
+typedef u8 urandom_buffer_t[4096];
+
+typedef struct
+{
+  /** read buffer for random data from /dev/urandom */
+  urandom_buffer_t urandom_buffer;
+  /** pool of all the random_bytes_t objects ever allocated */
+  random_bytes_t *rb_pool;
+  /** vector of random_bytes_t objects containing random bytes */
+  u32 *rb_from_dev_urandom;
+  /** vector of used random_bytes_t objects */
+  u32 *rb_recycle_list;
+  /** vector of random bytes collected from encrypted data */
+  u32 *rb_from_traffic;
+} ipsecmb_per_thread_data_t;
+
+typedef struct
+{
+  ipsecmb_crypto_alg_t *crypto_algs;
+  ipsecmb_integ_alg_t *integ_algs;
+  MB_MGR **mb_mgr;
+  ipsecmb_sa_t *sad;
+  ipsecmb_per_thread_data_t *per_thread_data;
+  int dev_urandom_fd;
+} ipsecmb_main_t;
+
+extern ipsecmb_main_t ipsecmb_main;
+
+#define P(x,y) x ## _ ## y
+#define E(x,y) P(x,y)
+#define IPSECMB_FUNC(f) E(f,CLIB_MARCH_VARIANT)
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
+
+#endif /* __included_ipsecmb_h__ */
diff --git a/src/vnet/buffer.h b/src/vnet/buffer.h
index 89dd84567bc..d1edbe54805 100644
--- a/src/vnet/buffer.h
+++ b/src/vnet/buffer.h
@@ -274,6 +274,10 @@ typedef struct
     {
       u32 flags;
       u32 sad_index;
+      u32 ip_version_traffic_class_and_flow_label;
+      u8 tos;
+      u8 ttl_or_hop_limit;
+      u32 seq;
     } ipsec;
 
     /* MAP */