src/plugins/ikev2/ikev2_priv.h

   1 /*
   2  * Copyright (c) 2015 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15 #ifndef __included_ikev2_priv_h__
  16 #define __included_ikev2_priv_h__
  17
  18 #include <vnet/vnet.h>
  19 #include <vnet/ip/ip.h>
  20 #include <vnet/ethernet/ethernet.h>
  21
  22 #include <plugins/ikev2/ikev2.h>
  23
  24 #include <vppinfra/hash.h>
  25 #include <vppinfra/elog.h>
  26 #include <vppinfra/error.h>
  27
  28 #include <openssl/rand.h>
  29 #include <openssl/dh.h>
  30 #include <openssl/hmac.h>
  31 #include <openssl/evp.h>
  32
  33 #define IKEV2_DEBUG_PAYLOAD 1
  34
  35 #if IKEV2_DEBUG_PAYLOAD == 1
  36 #define DBG_PLD(my_args...) clib_warning(my_args)
  37 #else
  38 #define DBG_PLD(my_args...)
  39 #endif
  40
  41 typedef enum
  42 {
  43   IKEV2_STATE_UNKNOWN,
  44   IKEV2_STATE_SA_INIT,
  45   IKEV2_STATE_DELETED,
  46   IKEV2_STATE_AUTH_FAILED,
  47   IKEV2_STATE_AUTHENTICATED,
  48   IKEV2_STATE_NOTIFY_AND_DELETE,
  49   IKEV2_STATE_TS_UNACCEPTABLE,
  50   IKEV2_STATE_NO_PROPOSAL_CHOSEN,
  51 } ikev2_state_t;
  52
  53 typedef struct
  54 {
  55   ikev2_auth_method_t method:8;
  56   u8 *data;
  57   u8 hex;                       /* hex encoding of the shared secret */
  58   EVP_PKEY *key;
  59 } ikev2_auth_t;
  60
  61 typedef enum
  62 {
  63   IKEV2_DH_GROUP_MODP = 0,
  64   IKEV2_DH_GROUP_ECP = 1,
  65 } ikev2_dh_group_t;
  66
  67 typedef struct
  68 {
  69   ikev2_transform_type_t type;
  70   union
  71   {
  72     u16 transform_id;
  73     ikev2_transform_encr_type_t encr_type:16;
  74     ikev2_transform_prf_type_t prf_type:16;
  75     ikev2_transform_integ_type_t integ_type:16;
  76     ikev2_transform_dh_type_t dh_type:16;
  77     ikev2_transform_esn_type_t esn_type:16;
  78   };
  79   u8 *attrs;
  80   u16 key_len;
  81   u16 key_trunc;
  82   u16 block_size;
  83   u8 dh_group;
  84   int nid;
  85   const char *dh_p;
  86   const char *dh_g;
  87   const void *md;
  88   const void *cipher;
  89 } ikev2_sa_transform_t;
  90
  91 typedef struct
  92 {
  93   u8 proposal_num;
  94   ikev2_protocol_id_t protocol_id:8;
  95   u32 spi;
  96   ikev2_sa_transform_t *transforms;
  97 } ikev2_sa_proposal_t;
  98
  99 typedef struct
 100 {
 101   u8 ts_type;
 102   u8 protocol_id;
 103   u16 selector_len;
 104   u16 start_port;
 105   u16 end_port;
 106   ip4_address_t start_addr;
 107   ip4_address_t end_addr;
 108 } ikev2_ts_t;
 109
 110 typedef struct
 111 {
 112   u32 sw_if_index;
 113   ip4_address_t ip4;
 114 } ikev2_responder_t;
 115
 116 typedef struct
 117 {
 118   ikev2_transform_encr_type_t crypto_alg;
 119   ikev2_transform_integ_type_t integ_alg;
 120   ikev2_transform_dh_type_t dh_type;
 121   u32 crypto_key_size;
 122 } ikev2_transforms_set;
 123
 124
 125 typedef struct
 126 {
 127   ikev2_id_type_t type:8;
 128   u8 *data;
 129 } ikev2_id_t;
 130
 131 typedef struct
 132 {
 133   /* sa proposals vectors */
 134   ikev2_sa_proposal_t *i_proposals;
 135   ikev2_sa_proposal_t *r_proposals;
 136
 137   /* Traffic Selectors */
 138   ikev2_ts_t *tsi;
 139   ikev2_ts_t *tsr;
 140
 141   /* keys */
 142   u8 *sk_ai;
 143   u8 *sk_ar;
 144   u8 *sk_ei;
 145   u8 *sk_er;
 146
 147   /* lifetime data */
 148   f64 time_to_expiration;
 149   u8 is_expired;
 150   i8 rekey_retries;
 151 } ikev2_child_sa_t;
 152
 153 typedef struct
 154 {
 155   u8 protocol_id;
 156   u32 spi;                      /*for ESP and AH SPI size is 4, for IKE size is 0 */
 157 } ikev2_delete_t;
 158
 159 typedef struct
 160 {
 161   u8 protocol_id;
 162   u32 spi;
 163   u32 ispi;
 164   ikev2_sa_proposal_t *i_proposal;
 165   ikev2_sa_proposal_t *r_proposal;
 166   ikev2_ts_t *tsi;
 167   ikev2_ts_t *tsr;
 168 } ikev2_rekey_t;
 169
 170 typedef struct
 171 {
 172   u16 msg_type;
 173   u8 protocol_id;
 174   u32 spi;
 175   u8 *data;
 176 } ikev2_notify_t;
 177
 178 typedef struct
 179 {
 180   u8 *name;
 181   u8 is_enabled;
 182
 183   ikev2_auth_t auth;
 184   ikev2_id_t loc_id;
 185   ikev2_id_t rem_id;
 186   ikev2_ts_t loc_ts;
 187   ikev2_ts_t rem_ts;
 188   ikev2_responder_t responder;
 189   ikev2_transforms_set ike_ts;
 190   ikev2_transforms_set esp_ts;
 191   u64 lifetime;
 192   u64 lifetime_maxdata;
 193   u32 lifetime_jitter;
 194   u32 handover;
 195 } ikev2_profile_t;
 196
 197 typedef struct
 198 {
 199   ikev2_state_t state;
 200   u8 unsupported_cp;
 201   u8 initial_contact;
 202   ip4_address_t iaddr;
 203   ip4_address_t raddr;
 204   u64 ispi;
 205   u64 rspi;
 206   u8 *i_nonce;
 207   u8 *r_nonce;
 208
 209   /* DH data */
 210   u16 dh_group;
 211   u8 *dh_shared_key;
 212   u8 *dh_private_key;
 213   u8 *i_dh_data;
 214   u8 *r_dh_data;
 215
 216   /* sa proposals vectors */
 217   ikev2_sa_proposal_t *i_proposals;
 218   ikev2_sa_proposal_t *r_proposals;
 219
 220   /* keys */
 221   u8 *sk_d;
 222   u8 *sk_ai;
 223   u8 *sk_ar;
 224   u8 *sk_ei;
 225   u8 *sk_er;
 226   u8 *sk_pi;
 227   u8 *sk_pr;
 228
 229   /* auth */
 230   ikev2_auth_t i_auth;
 231   ikev2_auth_t r_auth;
 232
 233   /* ID */
 234   ikev2_id_t i_id;
 235   ikev2_id_t r_id;
 236
 237   /* pending deletes */
 238   ikev2_delete_t *del;
 239
 240   /* pending rekeyings */
 241   ikev2_rekey_t *rekey;
 242
 243   /* packet data */
 244   u8 *last_sa_init_req_packet_data;
 245   u8 *last_sa_init_res_packet_data;
 246
 247   /* retransmit */
 248   u32 last_msg_id;
 249   u8 *last_res_packet_data;
 250
 251   u8 is_initiator;
 252   u32 last_init_msg_id;
 253   ikev2_profile_t *profile;
 254
 255   ikev2_child_sa_t *childs;
 256 } ikev2_sa_t;
 257
 258
 259 typedef struct
 260 {
 261   /* pool of IKEv2 Security Associations */
 262   ikev2_sa_t *sas;
 263
 264   /* hash */
 265   uword *sa_by_rspi;
 266 } ikev2_main_per_thread_data_t;
 267
 268 typedef struct
 269 {
 270   /* pool of IKEv2 profiles */
 271   ikev2_profile_t *profiles;
 272
 273   /* vector of supported transform types */
 274   ikev2_sa_transform_t *supported_transforms;
 275
 276   /* hash */
 277   mhash_t profile_index_by_name;
 278
 279   /* local private key */
 280   EVP_PKEY *pkey;
 281
 282   /* convenience */
 283   vlib_main_t *vlib_main;
 284   vnet_main_t *vnet_main;
 285
 286   /* pool of IKEv2 Security Associations created in initiator mode */
 287   ikev2_sa_t *sais;
 288   /* hash */
 289   uword *sa_by_ispi;
 290
 291   ikev2_main_per_thread_data_t *per_thread_data;
 292
 293   /* API message ID base */
 294   u16 msg_id_base;
 295 } ikev2_main_t;
 296
 297 extern ikev2_main_t ikev2_main;
 298
 299 void ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v);
 300 ikev2_sa_transform_t *ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
 301                                                 ikev2_transform_type_t type);
 302
 303 /* ikev2_crypto.c */
 304 v8 *ikev2_calc_prf (ikev2_sa_transform_t * tr, v8 * key, v8 * data);
 305 u8 *ikev2_calc_prfplus (ikev2_sa_transform_t * tr, u8 * key, u8 * seed,
 306                         int len);
 307 v8 *ikev2_calc_integr (ikev2_sa_transform_t * tr, v8 * key, u8 * data,
 308                        int len);
 309 v8 *ikev2_decrypt_data (ikev2_sa_t * sa, u8 * data, int len);
 310 int ikev2_encrypt_data (ikev2_sa_t * sa, v8 * src, u8 * dst);
 311 void ikev2_generate_dh (ikev2_sa_t * sa, ikev2_sa_transform_t * t);
 312 void ikev2_complete_dh (ikev2_sa_t * sa, ikev2_sa_transform_t * t);
 313 int ikev2_verify_sign (EVP_PKEY * pkey, u8 * sigbuf, u8 * data);
 314 u8 *ikev2_calc_sign (EVP_PKEY * pkey, u8 * data);
 315 EVP_PKEY *ikev2_load_cert_file (u8 * file);
 316 EVP_PKEY *ikev2_load_key_file (u8 * file);
 317 void ikev2_crypto_init (ikev2_main_t * km);
 318
 319 /* ikev2_payload.c */
 320 typedef struct
 321 {
 322   u8 first_payload_type;
 323   u16 last_hdr_off;
 324   u8 *data;
 325 } ikev2_payload_chain_t;
 326
 327 #define ikev2_payload_new_chain(V) vec_validate (V, 0)
 328 #define ikev2_payload_destroy_chain(V) do { \
 329   vec_free((V)->data);                 \
 330   vec_free(V);                         \
 331 } while (0)
 332
 333 void ikev2_payload_add_notify (ikev2_payload_chain_t * c, u16 msg_type,
 334                                u8 * data);
 335 void ikev2_payload_add_notify_2 (ikev2_payload_chain_t * c, u16 msg_type,
 336                                  u8 * data, ikev2_notify_t * notify);
 337 void ikev2_payload_add_sa (ikev2_payload_chain_t * c,
 338                            ikev2_sa_proposal_t * proposals);
 339 void ikev2_payload_add_ke (ikev2_payload_chain_t * c, u16 dh_group,
 340                            u8 * dh_data);
 341 void ikev2_payload_add_nonce (ikev2_payload_chain_t * c, u8 * nonce);
 342 void ikev2_payload_add_id (ikev2_payload_chain_t * c, ikev2_id_t * id,
 343                            u8 type);
 344 void ikev2_payload_add_auth (ikev2_payload_chain_t * c, ikev2_auth_t * auth);
 345 void ikev2_payload_add_ts (ikev2_payload_chain_t * c, ikev2_ts_t * ts,
 346                            u8 type);
 347 void ikev2_payload_add_delete (ikev2_payload_chain_t * c, ikev2_delete_t * d);
 348 void ikev2_payload_chain_add_padding (ikev2_payload_chain_t * c, int bs);
 349 void ikev2_parse_vendor_payload (ike_payload_header_t * ikep);
 350 ikev2_sa_proposal_t *ikev2_parse_sa_payload (ike_payload_header_t * ikep);
 351 ikev2_ts_t *ikev2_parse_ts_payload (ike_payload_header_t * ikep);
 352 ikev2_delete_t *ikev2_parse_delete_payload (ike_payload_header_t * ikep);
 353 ikev2_notify_t *ikev2_parse_notify_payload (ike_payload_header_t * ikep);
 354
 355 #endif /* __included_ikev2_priv_h__ */
 356
 357
 358 /*
 359  * fd.io coding-style-patch-verification: ON
 360  *
 361  * Local Variables:
 362  * eval: (c-set-style "gnu")
 363  * End:
 364  */