Implemented IKEv2 initiator features:

- IKE_SA_INIT and IKE_AUTH initial exchanges
- Delete IKA SA
- Rekey and delete Child SA
- Child SAs lifetime policy

To set up one VPP instance as the initiator use the following CLI commands (or API equivalents):

ikev2 profile set <id> responder <interface> <addr>
ikev2 profile set <id> ike-crypto-alg <crypto alg> <key size> ike-integ-alg <integ alg> ike-dh <dh type>
ikev2 profile set <id> esp-crypto-alg <crypto alg> <key size> esp-integ-alg <integ alg> esp-dh <dh type>
ikev2 profile set <id> sa-lifetime <seconds> <jitter> <handover> <max bytes>

and finally
ikev2 initiate sa-init <profile id> to initiate the IKE_SA_INIT exchange

Child SA re-keying process:
1. Child SA expires
2. A new Child SA is created using the Child SA rekey exchange
3. For a set time both SAs are alive
4. After the set time interval expires old SA is deleted

Any additional settings will not be carried over (i.e. settings of the ipsec<x> interface associated with the Child SA)

CLI API additions:
ikev2 profile set <id> responder <interface> <addr>
ikev2 profile set <id> ike-crypto-alg <crypto alg> <key size> ike-integ-alg <integ alg> ike-dh <dh type>
ikev2 profile set <id> esp-crypto-alg <crypto alg> <key size> esp-integ-alg <integ alg> esp-dh <dh type>
ikev2 profile set <id> sa-lifetime <seconds> <jitter> <handover> <max bytes>
ikev2 initiate sa-init <profile id>
ikev2 initiate del-child-sa <child sa ispi>
ikev2 initiate del-sa <sa ispi>
ikev2 initiate rekey-child-sa <profile id> <child sa ispi>

Sample configurations:

Responder:
ikev2 profile add pr1
ikev2 profile set pr1 auth shared-key-mic string Vpp123
ikev2 profile set pr1 id local  fqdn vpp.home.responder
ikev2 profile set pr1 id remote fqdn vpp.home.initiator
ikev2 profile set pr1 traffic-selector remote ip-range 192.168.125.0 - 192.168.125.255 port-range 0 - 65535 protocol 0
ikev2 profile set pr1 traffic-selector local ip-range 192.168.124.0 - 192.168.124.255 port-range 0 - 65535 protocol 0

Initiator:
ikev2 profile add pr1
ikev2 profile set pr1 auth shared-key-mic string Vpp123
ikev2 profile set pr1 id local  fqdn vpp.home.initiator
ikev2 profile set pr1 id remote fqdn vpp.home.responder
ikev2 profile set pr1 traffic-selector local ip-range 192.168.125.0 - 192.168.125.255 port-range 0 - 65535 protocol 0
ikev2 profile set pr1 traffic-selector remote ip-range 192.168.124.0 - 192.168.124.255 port-range 0 - 65535 protocol 0
ikev2 profile set pr1 responder TenGigabitEthernet3/0/1 192.168.40.20
ikev2 profile set pr1 ike-crypto-alg aes-cbc 192  ike-integ-alg sha1-96  ike-dh modp-2048
ikev2 profile set pr1 esp-crypto-alg aes-cbc 192  esp-integ-alg sha1-96  esp-dh ecp-256
ikev2 profile set pr1 sa-lifetime 3600 10 5 0

Change-Id: I1db9084dc787129ea61298223fb7585a6f7eaf9e
Signed-off-by: Radu Nicolau <radu.nicolau@intel.com>

1 files changed, 52 insertions, 11 deletions

diff --git a/src/vnet/ipsec/ikev2_priv.h b/src/vnet/ipsec/ikev2_priv.h
index 9f67ad2ae6f..5a3dc5202f4 100644
--- a/src/vnet/ipsec/ikev2_priv.h
+++ b/src/vnet/ipsec/ikev2_priv.h
@@ -109,6 +109,21 @@ typedef struct
 
 typedef struct
 {
+  u32 sw_if_index;
+  ip4_address_t ip4;
+} ikev2_responder_t;
+
+typedef struct
+{
+  ikev2_transform_encr_type_t crypto_alg;
+  ikev2_transform_integ_type_t integ_alg;
+  ikev2_transform_dh_type_t dh_type;
+  u32 crypto_key_size;
+} ikev2_transforms_set;
+
+
+typedef struct
+{
   ikev2_id_type_t type:8;
   u8 *data;
 } ikev2_id_t;
@@ -128,6 +143,11 @@ typedef struct
   u8 *sk_ar;
   u8 *sk_ei;
   u8 *sk_er;
+
+  /* lifetime data */
+  f64 time_to_expiration;
+  u8 is_expired;
+  i8 rekey_retries;
 } ikev2_child_sa_t;
 
 typedef struct
@@ -140,6 +160,7 @@ typedef struct
 {
   u8 protocol_id;
   u32 spi;
+  u32 ispi;
   ikev2_sa_proposal_t *i_proposal;
   ikev2_sa_proposal_t *r_proposal;
   ikev2_ts_t *tsi;
@@ -154,6 +175,24 @@ typedef struct
   u8 *data;
 } ikev2_notify_t;
 
+typedef struct
+{
+  u8 *name;
+  u8 is_enabled;
+
+  ikev2_auth_t auth;
+  ikev2_id_t loc_id;
+  ikev2_id_t rem_id;
+  ikev2_ts_t loc_ts;
+  ikev2_ts_t rem_ts;
+  ikev2_responder_t responder;
+  ikev2_transforms_set ike_ts;
+  ikev2_transforms_set esp_ts;
+  u64 lifetime;
+  u64 lifetime_maxdata;
+  u32 lifetime_jitter;
+  u32 handover;
+} ikev2_profile_t;
 
 typedef struct
 {
@@ -170,6 +209,7 @@ typedef struct
   /* DH data */
   u16 dh_group;
   u8 *dh_shared_key;
+  u8 *dh_private_key;
   u8 *i_dh_data;
   u8 *r_dh_data;
 
@@ -208,20 +248,13 @@ typedef struct
   u32 last_msg_id;
   u8 *last_res_packet_data;
 
+  u8 is_initiator;
+  u32 last_init_msg_id;
+  ikev2_profile_t *profile;
+
   ikev2_child_sa_t *childs;
 } ikev2_sa_t;
 
-typedef struct
-{
-  u8 *name;
-  u8 is_enabled;
-
-  ikev2_auth_t auth;
-  ikev2_id_t loc_id;
-  ikev2_id_t rem_id;
-  ikev2_ts_t loc_ts;
-  ikev2_ts_t rem_ts;
-} ikev2_profile_t;
 
 typedef struct
 {
@@ -250,6 +283,11 @@ typedef struct
   vlib_main_t *vlib_main;
   vnet_main_t *vnet_main;
 
+  /* pool of IKEv2 Security Associations created in initiator mode */
+  ikev2_sa_t *sais;
+  /* hash */
+  uword *sa_by_ispi;
+
   ikev2_main_per_thread_data_t *per_thread_data;
 
 } ikev2_main_t;
@@ -269,6 +307,7 @@ v8 *ikev2_calc_integr (ikev2_sa_transform_t * tr, v8 * key, u8 * data,
 v8 *ikev2_decrypt_data (ikev2_sa_t * sa, u8 * data, int len);
 int ikev2_encrypt_data (ikev2_sa_t * sa, v8 * src, u8 * dst);
 void ikev2_generate_dh (ikev2_sa_t * sa, ikev2_sa_transform_t * t);
+void ikev2_complete_dh (ikev2_sa_t * sa, ikev2_sa_transform_t * t);
 int ikev2_verify_sign (EVP_PKEY * pkey, u8 * sigbuf, u8 * data);
 u8 *ikev2_calc_sign (EVP_PKEY * pkey, u8 * data);
 EVP_PKEY *ikev2_load_cert_file (u8 * file);
@@ -291,6 +330,8 @@ typedef struct
 
 void ikev2_payload_add_notify (ikev2_payload_chain_t * c, u16 msg_type,
 			       u8 * data);
+void ikev2_payload_add_notify_2 (ikev2_payload_chain_t * c, u16 msg_type,
+				 u8 * data, ikev2_notify_t * notify);
 void ikev2_payload_add_sa (ikev2_payload_chain_t * c,
 			   ikev2_sa_proposal_t * proposals);
 void ikev2_payload_add_ke (ikev2_payload_chain_t * c, u16 dh_group,