src/vnet/ipsec/ipsec.c

   1 /*
   2  * ipsec.c : IPSEC module functions
   3  *
   4  * Copyright (c) 2015 Cisco and/or its affiliates.
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at:
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  */
  17
  18 #include <vnet/vnet.h>
  19 #include <vnet/api_errno.h>
  20 #include <vnet/ip/ip.h>
  21 #include <vnet/interface.h>
  22 #include <vnet/udp/udp_local.h>
  23
  24 #include <vnet/ipsec/ipsec.h>
  25 #include <vnet/ipsec/esp.h>
  26 #include <vnet/ipsec/ah.h>
  27
  28 ipsec_main_t ipsec_main;
  29 esp_async_post_next_t esp_encrypt_async_next;
  30 esp_async_post_next_t esp_decrypt_async_next;
  31
  32 static clib_error_t *
  33 ipsec_check_ah_support (ipsec_sa_t * sa)
  34 {
  35   ipsec_main_t *im = &ipsec_main;
  36
  37   if (sa->integ_alg == IPSEC_INTEG_ALG_NONE)
  38     return clib_error_return (0, "unsupported none integ-alg");
  39
  40   if (!vnet_crypto_is_set_handler (im->integ_algs[sa->integ_alg].alg))
  41     return clib_error_return (0, "No crypto engine support for %U",
  42                               format_ipsec_integ_alg, sa->integ_alg);
  43
  44   return 0;
  45 }
  46
  47 static clib_error_t *
  48 ipsec_check_esp_support (ipsec_sa_t * sa)
  49 {
  50   ipsec_main_t *im = &ipsec_main;
  51
  52   if (IPSEC_INTEG_ALG_NONE != sa->integ_alg)
  53     {
  54       if (!vnet_crypto_is_set_handler (im->integ_algs[sa->integ_alg].alg))
  55         return clib_error_return (0, "No crypto engine support for %U",
  56                                   format_ipsec_integ_alg, sa->integ_alg);
  57     }
  58   if (IPSEC_CRYPTO_ALG_NONE != sa->crypto_alg)
  59     {
  60       if (!vnet_crypto_is_set_handler (im->crypto_algs[sa->crypto_alg].alg))
  61         return clib_error_return (0, "No crypto engine support for %U",
  62                                   format_ipsec_crypto_alg, sa->crypto_alg);
  63     }
  64
  65   return (0);
  66 }
  67
  68 clib_error_t *
  69 ipsec_add_del_sa_sess_cb (ipsec_main_t * im, u32 sa_index, u8 is_add)
  70 {
  71   ipsec_ah_backend_t *ah =
  72     pool_elt_at_index (im->ah_backends, im->ah_current_backend);
  73   if (ah->add_del_sa_sess_cb)
  74     {
  75       clib_error_t *err = ah->add_del_sa_sess_cb (sa_index, is_add);
  76       if (err)
  77         return err;
  78     }
  79   ipsec_esp_backend_t *esp =
  80     pool_elt_at_index (im->esp_backends, im->esp_current_backend);
  81   if (esp->add_del_sa_sess_cb)
  82     {
  83       clib_error_t *err = esp->add_del_sa_sess_cb (sa_index, is_add);
  84       if (err)
  85         return err;
  86     }
  87   return 0;
  88 }
  89
  90 clib_error_t *
  91 ipsec_check_support_cb (ipsec_main_t * im, ipsec_sa_t * sa)
  92 {
  93   clib_error_t *error = 0;
  94
  95   if (PREDICT_FALSE (sa->protocol == IPSEC_PROTOCOL_AH))
  96     {
  97       ipsec_ah_backend_t *ah =
  98         pool_elt_at_index (im->ah_backends, im->ah_current_backend);
  99       ASSERT (ah->check_support_cb);
 100       error = ah->check_support_cb (sa);
 101     }
 102   else
 103     {
 104       ipsec_esp_backend_t *esp =
 105         pool_elt_at_index (im->esp_backends, im->esp_current_backend);
 106       ASSERT (esp->check_support_cb);
 107       error = esp->check_support_cb (sa);
 108     }
 109   return error;
 110 }
 111
 112
 113 static void
 114 ipsec_add_node (vlib_main_t * vm, const char *node_name,
 115                 const char *prev_node_name, u32 * out_node_index,
 116                 u32 * out_next_index)
 117 {
 118   vlib_node_t *prev_node, *node;
 119   prev_node = vlib_get_node_by_name (vm, (u8 *) prev_node_name);
 120   ASSERT (prev_node);
 121   node = vlib_get_node_by_name (vm, (u8 *) node_name);
 122   ASSERT (node);
 123   *out_node_index = node->index;
 124   *out_next_index = vlib_node_add_next (vm, prev_node->index, node->index);
 125 }
 126
 127 void
 128 ipsec_unregister_udp_port (u16 port)
 129 {
 130   ipsec_main_t *im = &ipsec_main;
 131   u32 n_regs;
 132   uword *p;
 133
 134   p = hash_get (im->udp_port_registrations, port);
 135
 136   ASSERT (p);
 137
 138   n_regs = p[0];
 139
 140   if (0 == --n_regs)
 141     {
 142       udp_unregister_dst_port (vlib_get_main (), port, 1);
 143       hash_unset (im->udp_port_registrations, port);
 144     }
 145   else
 146     {
 147       hash_unset (im->udp_port_registrations, port);
 148       hash_set (im->udp_port_registrations, port, n_regs);
 149     }
 150 }
 151
 152 void
 153 ipsec_register_udp_port (u16 port)
 154 {
 155   ipsec_main_t *im = &ipsec_main;
 156   u32 n_regs;
 157   uword *p;
 158
 159   p = hash_get (im->udp_port_registrations, port);
 160
 161   n_regs = (p ? p[0] : 0);
 162
 163   if (0 == n_regs++)
 164     udp_register_dst_port (vlib_get_main (), port,
 165                            ipsec4_tun_input_node.index, 1);
 166
 167   hash_unset (im->udp_port_registrations, port);
 168   hash_set (im->udp_port_registrations, port, n_regs);
 169 }
 170
 171 u32
 172 ipsec_register_ah_backend (vlib_main_t * vm, ipsec_main_t * im,
 173                            const char *name,
 174                            const char *ah4_encrypt_node_name,
 175                            const char *ah4_decrypt_node_name,
 176                            const char *ah6_encrypt_node_name,
 177                            const char *ah6_decrypt_node_name,
 178                            check_support_cb_t ah_check_support_cb,
 179                            add_del_sa_sess_cb_t ah_add_del_sa_sess_cb)
 180 {
 181   ipsec_ah_backend_t *b;
 182   pool_get (im->ah_backends, b);
 183   b->name = format (0, "%s%c", name, 0);
 184
 185   ipsec_add_node (vm, ah4_encrypt_node_name, "ipsec4-output-feature",
 186                   &b->ah4_encrypt_node_index, &b->ah4_encrypt_next_index);
 187   ipsec_add_node (vm, ah4_decrypt_node_name, "ipsec4-input-feature",
 188                   &b->ah4_decrypt_node_index, &b->ah4_decrypt_next_index);
 189   ipsec_add_node (vm, ah6_encrypt_node_name, "ipsec6-output-feature",
 190                   &b->ah6_encrypt_node_index, &b->ah6_encrypt_next_index);
 191   ipsec_add_node (vm, ah6_decrypt_node_name, "ipsec6-input-feature",
 192                   &b->ah6_decrypt_node_index, &b->ah6_decrypt_next_index);
 193
 194   b->check_support_cb = ah_check_support_cb;
 195   b->add_del_sa_sess_cb = ah_add_del_sa_sess_cb;
 196   return b - im->ah_backends;
 197 }
 198
 199 u32
 200 ipsec_register_esp_backend (
 201   vlib_main_t *vm, ipsec_main_t *im, const char *name,
 202   const char *esp4_encrypt_node_name, const char *esp4_encrypt_node_tun_name,
 203   const char *esp4_decrypt_node_name, const char *esp4_decrypt_tun_node_name,
 204   const char *esp6_encrypt_node_name, const char *esp6_encrypt_node_tun_name,
 205   const char *esp6_decrypt_node_name, const char *esp6_decrypt_tun_node_name,
 206   const char *esp_mpls_encrypt_node_tun_name,
 207   check_support_cb_t esp_check_support_cb,
 208   add_del_sa_sess_cb_t esp_add_del_sa_sess_cb,
 209   enable_disable_cb_t enable_disable_cb)
 210 {
 211   ipsec_esp_backend_t *b;
 212
 213   pool_get (im->esp_backends, b);
 214   b->name = format (0, "%s%c", name, 0);
 215
 216   ipsec_add_node (vm, esp4_encrypt_node_name, "ipsec4-output-feature",
 217                   &b->esp4_encrypt_node_index, &b->esp4_encrypt_next_index);
 218   ipsec_add_node (vm, esp4_decrypt_node_name, "ipsec4-input-feature",
 219                   &b->esp4_decrypt_node_index, &b->esp4_decrypt_next_index);
 220   ipsec_add_node (vm, esp6_encrypt_node_name, "ipsec6-output-feature",
 221                   &b->esp6_encrypt_node_index, &b->esp6_encrypt_next_index);
 222   ipsec_add_node (vm, esp6_decrypt_node_name, "ipsec6-input-feature",
 223                   &b->esp6_decrypt_node_index, &b->esp6_decrypt_next_index);
 224   ipsec_add_node (vm, esp4_decrypt_tun_node_name, "ipsec4-tun-input",
 225                   &b->esp4_decrypt_tun_node_index,
 226                   &b->esp4_decrypt_tun_next_index);
 227   ipsec_add_node (vm, esp6_decrypt_tun_node_name, "ipsec6-tun-input",
 228                   &b->esp6_decrypt_tun_node_index,
 229                   &b->esp6_decrypt_tun_next_index);
 230
 231   b->esp6_encrypt_tun_node_index =
 232     vlib_get_node_by_name (vm, (u8 *) esp6_encrypt_node_tun_name)->index;
 233   b->esp_mpls_encrypt_tun_node_index =
 234     vlib_get_node_by_name (vm, (u8 *) esp_mpls_encrypt_node_tun_name)->index;
 235   b->esp4_encrypt_tun_node_index =
 236     vlib_get_node_by_name (vm, (u8 *) esp4_encrypt_node_tun_name)->index;
 237
 238   b->check_support_cb = esp_check_support_cb;
 239   b->add_del_sa_sess_cb = esp_add_del_sa_sess_cb;
 240   b->enable_disable_cb = enable_disable_cb;
 241
 242   return b - im->esp_backends;
 243 }
 244
 245 clib_error_t *
 246 ipsec_rsc_in_use (ipsec_main_t * im)
 247 {
 248   /* return an error is crypto resource are in use */
 249   if (pool_elts (ipsec_sa_pool) > 0)
 250     return clib_error_return (0, "%d SA entries configured",
 251                               pool_elts (ipsec_sa_pool));
 252
 253   return (NULL);
 254 }
 255
 256 int
 257 ipsec_select_ah_backend (ipsec_main_t * im, u32 backend_idx)
 258 {
 259   if (ipsec_rsc_in_use (im))
 260     return VNET_API_ERROR_RSRC_IN_USE;
 261
 262   if (pool_is_free_index (im->ah_backends, backend_idx))
 263     return VNET_API_ERROR_INVALID_VALUE;
 264
 265   ipsec_ah_backend_t *b = pool_elt_at_index (im->ah_backends, backend_idx);
 266   im->ah_current_backend = backend_idx;
 267   im->ah4_encrypt_node_index = b->ah4_encrypt_node_index;
 268   im->ah4_decrypt_node_index = b->ah4_decrypt_node_index;
 269   im->ah4_encrypt_next_index = b->ah4_encrypt_next_index;
 270   im->ah4_decrypt_next_index = b->ah4_decrypt_next_index;
 271   im->ah6_encrypt_node_index = b->ah6_encrypt_node_index;
 272   im->ah6_decrypt_node_index = b->ah6_decrypt_node_index;
 273   im->ah6_encrypt_next_index = b->ah6_encrypt_next_index;
 274   im->ah6_decrypt_next_index = b->ah6_decrypt_next_index;
 275
 276   return 0;
 277 }
 278
 279 int
 280 ipsec_select_esp_backend (ipsec_main_t * im, u32 backend_idx)
 281 {
 282   if (ipsec_rsc_in_use (im))
 283     return VNET_API_ERROR_RSRC_IN_USE;
 284
 285   if (pool_is_free_index (im->esp_backends, backend_idx))
 286     return VNET_API_ERROR_INVALID_VALUE;
 287
 288   /* disable current backend */
 289   if (im->esp_current_backend != ~0)
 290     {
 291       ipsec_esp_backend_t *cb = pool_elt_at_index (im->esp_backends,
 292                                                    im->esp_current_backend);
 293       if (cb->enable_disable_cb)
 294         {
 295           if ((cb->enable_disable_cb) (0) != 0)
 296             return -1;
 297         }
 298     }
 299
 300   ipsec_esp_backend_t *b = pool_elt_at_index (im->esp_backends, backend_idx);
 301   im->esp_current_backend = backend_idx;
 302   im->esp4_encrypt_node_index = b->esp4_encrypt_node_index;
 303   im->esp4_decrypt_node_index = b->esp4_decrypt_node_index;
 304   im->esp4_encrypt_next_index = b->esp4_encrypt_next_index;
 305   im->esp4_decrypt_next_index = b->esp4_decrypt_next_index;
 306   im->esp6_encrypt_node_index = b->esp6_encrypt_node_index;
 307   im->esp6_decrypt_node_index = b->esp6_decrypt_node_index;
 308   im->esp6_encrypt_next_index = b->esp6_encrypt_next_index;
 309   im->esp6_decrypt_next_index = b->esp6_decrypt_next_index;
 310   im->esp4_decrypt_tun_node_index = b->esp4_decrypt_tun_node_index;
 311   im->esp4_decrypt_tun_next_index = b->esp4_decrypt_tun_next_index;
 312   im->esp6_decrypt_tun_node_index = b->esp6_decrypt_tun_node_index;
 313   im->esp6_decrypt_tun_next_index = b->esp6_decrypt_tun_next_index;
 314   im->esp4_encrypt_tun_node_index = b->esp4_encrypt_tun_node_index;
 315   im->esp6_encrypt_tun_node_index = b->esp6_encrypt_tun_node_index;
 316   im->esp_mpls_encrypt_tun_node_index = b->esp_mpls_encrypt_tun_node_index;
 317
 318   if (b->enable_disable_cb)
 319     {
 320       if ((b->enable_disable_cb) (1) != 0)
 321         return -1;
 322     }
 323   return 0;
 324 }
 325
 326 void
 327 ipsec_set_async_mode (u32 is_enabled)
 328 {
 329   ipsec_main_t *im = &ipsec_main;
 330   ipsec_sa_t *sa;
 331
 332   /* lock all SAs before change im->async_mode */
 333   pool_foreach (sa, ipsec_sa_pool)
 334     {
 335       fib_node_lock (&sa->node);
 336     }
 337
 338   im->async_mode = is_enabled;
 339
 340   /* change SA crypto op data before unlock them */
 341   pool_foreach (sa, ipsec_sa_pool)
 342     {
 343       sa->crypto_op_data =
 344         is_enabled ? sa->async_op_data.data : sa->sync_op_data.data;
 345       fib_node_unlock (&sa->node);
 346     }
 347 }
 348
 349 static void
 350 crypto_engine_backend_register_post_node (vlib_main_t * vm)
 351 {
 352   esp_async_post_next_t *eit;
 353   esp_async_post_next_t *dit;
 354
 355   eit = &esp_encrypt_async_next;
 356   eit->esp4_post_next =
 357     vnet_crypto_register_post_node (vm, "esp4-encrypt-post");
 358   eit->esp6_post_next =
 359     vnet_crypto_register_post_node (vm, "esp6-encrypt-post");
 360   eit->esp4_tun_post_next =
 361     vnet_crypto_register_post_node (vm, "esp4-encrypt-tun-post");
 362   eit->esp6_tun_post_next =
 363     vnet_crypto_register_post_node (vm, "esp6-encrypt-tun-post");
 364   eit->esp_mpls_tun_post_next =
 365     vnet_crypto_register_post_node (vm, "esp-mpls-encrypt-tun-post");
 366
 367   dit = &esp_decrypt_async_next;
 368   dit->esp4_post_next =
 369     vnet_crypto_register_post_node (vm, "esp4-decrypt-post");
 370   dit->esp6_post_next =
 371     vnet_crypto_register_post_node (vm, "esp6-decrypt-post");
 372   dit->esp4_tun_post_next =
 373     vnet_crypto_register_post_node (vm, "esp4-decrypt-tun-post");
 374   dit->esp6_tun_post_next =
 375     vnet_crypto_register_post_node (vm, "esp6-decrypt-tun-post");
 376 }
 377
 378 static clib_error_t *
 379 ipsec_init (vlib_main_t * vm)
 380 {
 381   clib_error_t *error;
 382   ipsec_main_t *im = &ipsec_main;
 383   ipsec_main_crypto_alg_t *a;
 384
 385   /* Backend registration requires the feature arcs to be set up */
 386   if ((error = vlib_call_init_function (vm, vnet_feature_init)))
 387     return (error);
 388
 389   im->vnet_main = vnet_get_main ();
 390   im->vlib_main = vm;
 391
 392   im->spd_index_by_spd_id = hash_create (0, sizeof (uword));
 393   im->sa_index_by_sa_id = hash_create (0, sizeof (uword));
 394   im->spd_index_by_sw_if_index = hash_create (0, sizeof (uword));
 395
 396   vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
 397   ASSERT (node);
 398   im->error_drop_node_index = node->index;
 399
 400   im->ah_current_backend = ~0;
 401   im->esp_current_backend = ~0;
 402
 403   u32 idx = ipsec_register_ah_backend (vm, im, "crypto engine backend",
 404                                        "ah4-encrypt",
 405                                        "ah4-decrypt",
 406                                        "ah6-encrypt",
 407                                        "ah6-decrypt",
 408                                        ipsec_check_ah_support,
 409                                        NULL);
 410
 411   im->ah_default_backend = idx;
 412   int rv = ipsec_select_ah_backend (im, idx);
 413   ASSERT (0 == rv);
 414   (void) (rv);                  // avoid warning
 415
 416   idx = ipsec_register_esp_backend (
 417     vm, im, "crypto engine backend", "esp4-encrypt", "esp4-encrypt-tun",
 418     "esp4-decrypt", "esp4-decrypt-tun", "esp6-encrypt", "esp6-encrypt-tun",
 419     "esp6-decrypt", "esp6-decrypt-tun", "esp-mpls-encrypt-tun",
 420     ipsec_check_esp_support, NULL, crypto_dispatch_enable_disable);
 421   im->esp_default_backend = idx;
 422
 423   rv = ipsec_select_esp_backend (im, idx);
 424   ASSERT (0 == rv);
 425   (void) (rv);                  // avoid warning
 426
 427   if ((error = vlib_call_init_function (vm, ipsec_cli_init)))
 428     return error;
 429
 430   vec_validate (im->crypto_algs, IPSEC_CRYPTO_N_ALG - 1);
 431
 432   a = im->crypto_algs + IPSEC_CRYPTO_ALG_NONE;
 433   a->enc_op_id = VNET_CRYPTO_OP_NONE;
 434   a->dec_op_id = VNET_CRYPTO_OP_NONE;
 435   a->alg = VNET_CRYPTO_ALG_NONE;
 436   a->iv_size = 0;
 437   a->block_align = 1;
 438
 439   a = im->crypto_algs + IPSEC_CRYPTO_ALG_DES_CBC;
 440   a->enc_op_id = VNET_CRYPTO_OP_DES_CBC_ENC;
 441   a->dec_op_id = VNET_CRYPTO_OP_DES_CBC_DEC;
 442   a->alg = VNET_CRYPTO_ALG_DES_CBC;
 443   a->iv_size = a->block_align = 8;
 444
 445   a = im->crypto_algs + IPSEC_CRYPTO_ALG_3DES_CBC;
 446   a->enc_op_id = VNET_CRYPTO_OP_3DES_CBC_ENC;
 447   a->dec_op_id = VNET_CRYPTO_OP_3DES_CBC_DEC;
 448   a->alg = VNET_CRYPTO_ALG_3DES_CBC;
 449   a->iv_size = a->block_align = 8;
 450
 451   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_CBC_128;
 452   a->enc_op_id = VNET_CRYPTO_OP_AES_128_CBC_ENC;
 453   a->dec_op_id = VNET_CRYPTO_OP_AES_128_CBC_DEC;
 454   a->alg = VNET_CRYPTO_ALG_AES_128_CBC;
 455   a->iv_size = a->block_align = 16;
 456
 457   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_CBC_192;
 458   a->enc_op_id = VNET_CRYPTO_OP_AES_192_CBC_ENC;
 459   a->dec_op_id = VNET_CRYPTO_OP_AES_192_CBC_DEC;
 460   a->alg = VNET_CRYPTO_ALG_AES_192_CBC;
 461   a->iv_size = a->block_align = 16;
 462
 463   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_CBC_256;
 464   a->enc_op_id = VNET_CRYPTO_OP_AES_256_CBC_ENC;
 465   a->dec_op_id = VNET_CRYPTO_OP_AES_256_CBC_DEC;
 466   a->alg = VNET_CRYPTO_ALG_AES_256_CBC;
 467   a->iv_size = a->block_align = 16;
 468
 469   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_CTR_128;
 470   a->enc_op_id = VNET_CRYPTO_OP_AES_128_CTR_ENC;
 471   a->dec_op_id = VNET_CRYPTO_OP_AES_128_CTR_DEC;
 472   a->alg = VNET_CRYPTO_ALG_AES_128_CTR;
 473   a->iv_size = 8;
 474   a->block_align = 1;
 475
 476   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_CTR_192;
 477   a->enc_op_id = VNET_CRYPTO_OP_AES_192_CTR_ENC;
 478   a->dec_op_id = VNET_CRYPTO_OP_AES_192_CTR_DEC;
 479   a->alg = VNET_CRYPTO_ALG_AES_192_CTR;
 480   a->iv_size = 8;
 481   a->block_align = 1;
 482
 483   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_CTR_256;
 484   a->enc_op_id = VNET_CRYPTO_OP_AES_256_CTR_ENC;
 485   a->dec_op_id = VNET_CRYPTO_OP_AES_256_CTR_DEC;
 486   a->alg = VNET_CRYPTO_ALG_AES_256_CTR;
 487   a->iv_size = 8;
 488   a->block_align = 1;
 489
 490   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_GCM_128;
 491   a->enc_op_id = VNET_CRYPTO_OP_AES_128_GCM_ENC;
 492   a->dec_op_id = VNET_CRYPTO_OP_AES_128_GCM_DEC;
 493   a->alg = VNET_CRYPTO_ALG_AES_128_GCM;
 494   a->iv_size = 8;
 495   a->block_align = 1;
 496   a->icv_size = 16;
 497
 498   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_GCM_192;
 499   a->enc_op_id = VNET_CRYPTO_OP_AES_192_GCM_ENC;
 500   a->dec_op_id = VNET_CRYPTO_OP_AES_192_GCM_DEC;
 501   a->alg = VNET_CRYPTO_ALG_AES_192_GCM;
 502   a->iv_size = 8;
 503   a->block_align = 1;
 504   a->icv_size = 16;
 505
 506   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_GCM_256;
 507   a->enc_op_id = VNET_CRYPTO_OP_AES_256_GCM_ENC;
 508   a->dec_op_id = VNET_CRYPTO_OP_AES_256_GCM_DEC;
 509   a->alg = VNET_CRYPTO_ALG_AES_256_GCM;
 510   a->iv_size = 8;
 511   a->block_align = 1;
 512   a->icv_size = 16;
 513
 514   vec_validate (im->integ_algs, IPSEC_INTEG_N_ALG - 1);
 515   ipsec_main_integ_alg_t *i;
 516
 517   i = &im->integ_algs[IPSEC_INTEG_ALG_MD5_96];
 518   i->op_id = VNET_CRYPTO_OP_MD5_HMAC;
 519   i->alg = VNET_CRYPTO_ALG_HMAC_MD5;
 520   i->icv_size = 12;
 521
 522   i = &im->integ_algs[IPSEC_INTEG_ALG_SHA1_96];
 523   i->op_id = VNET_CRYPTO_OP_SHA1_HMAC;
 524   i->alg = VNET_CRYPTO_ALG_HMAC_SHA1;
 525   i->icv_size = 12;
 526
 527   i = &im->integ_algs[IPSEC_INTEG_ALG_SHA_256_96];
 528   i->op_id = VNET_CRYPTO_OP_SHA1_HMAC;
 529   i->alg = VNET_CRYPTO_ALG_HMAC_SHA256;
 530   i->icv_size = 12;
 531
 532   i = &im->integ_algs[IPSEC_INTEG_ALG_SHA_256_128];
 533   i->op_id = VNET_CRYPTO_OP_SHA256_HMAC;
 534   i->alg = VNET_CRYPTO_ALG_HMAC_SHA256;
 535   i->icv_size = 16;
 536
 537   i = &im->integ_algs[IPSEC_INTEG_ALG_SHA_384_192];
 538   i->op_id = VNET_CRYPTO_OP_SHA384_HMAC;
 539   i->alg = VNET_CRYPTO_ALG_HMAC_SHA384;
 540   i->icv_size = 24;
 541
 542   i = &im->integ_algs[IPSEC_INTEG_ALG_SHA_512_256];
 543   i->op_id = VNET_CRYPTO_OP_SHA512_HMAC;
 544   i->alg = VNET_CRYPTO_ALG_HMAC_SHA512;
 545   i->icv_size = 32;
 546
 547   vec_validate_aligned (im->ptd, vlib_num_workers (), CLIB_CACHE_LINE_BYTES);
 548
 549   im->async_mode = 0;
 550   crypto_engine_backend_register_post_node (vm);
 551
 552   return 0;
 553 }
 554
 555 VLIB_INIT_FUNCTION (ipsec_init);
 556
 557 /*
 558  * fd.io coding-style-patch-verification: ON
 559  *
 560  * Local Variables:
 561  * eval: (c-set-style "gnu")
 562  * End:
 563  */