examples/ipsec-secgw/sa.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2016-2017 Intel Corporation
   3  */
   4
   5 /*
   6  * Security Associations
   7  */
   8 #include <sys/types.h>
   9 #include <netinet/in.h>
  10 #include <netinet/ip.h>
  11 #include <netinet/ip6.h>
  12
  13 #include <rte_memzone.h>
  14 #include <rte_crypto.h>
  15 #include <rte_security.h>
  16 #include <rte_cryptodev.h>
  17 #include <rte_byteorder.h>
  18 #include <rte_errno.h>
  19 #include <rte_ip.h>
  20 #include <rte_random.h>
  21 #include <rte_ethdev.h>
  22
  23 #include "ipsec.h"
  24 #include "esp.h"
  25 #include "parser.h"
  26
  27 #define IPDEFTTL 64
  28
  29 struct supported_cipher_algo {
  30         const char *keyword;
  31         enum rte_crypto_cipher_algorithm algo;
  32         uint16_t iv_len;
  33         uint16_t block_size;
  34         uint16_t key_len;
  35 };
  36
  37 struct supported_auth_algo {
  38         const char *keyword;
  39         enum rte_crypto_auth_algorithm algo;
  40         uint16_t digest_len;
  41         uint16_t key_len;
  42         uint8_t key_not_req;
  43 };
  44
  45 struct supported_aead_algo {
  46         const char *keyword;
  47         enum rte_crypto_aead_algorithm algo;
  48         uint16_t iv_len;
  49         uint16_t block_size;
  50         uint16_t digest_len;
  51         uint16_t key_len;
  52         uint8_t aad_len;
  53 };
  54
  55
  56 const struct supported_cipher_algo cipher_algos[] = {
  57         {
  58                 .keyword = "null",
  59                 .algo = RTE_CRYPTO_CIPHER_NULL,
  60                 .iv_len = 0,
  61                 .block_size = 4,
  62                 .key_len = 0
  63         },
  64         {
  65                 .keyword = "aes-128-cbc",
  66                 .algo = RTE_CRYPTO_CIPHER_AES_CBC,
  67                 .iv_len = 16,
  68                 .block_size = 16,
  69                 .key_len = 16
  70         },
  71         {
  72                 .keyword = "aes-256-cbc",
  73                 .algo = RTE_CRYPTO_CIPHER_AES_CBC,
  74                 .iv_len = 16,
  75                 .block_size = 16,
  76                 .key_len = 32
  77         },
  78         {
  79                 .keyword = "aes-128-ctr",
  80                 .algo = RTE_CRYPTO_CIPHER_AES_CTR,
  81                 .iv_len = 8,
  82                 .block_size = 16, /* XXX AESNI MB limition, should be 4 */
  83                 .key_len = 20
  84         },
  85         {
  86                 .keyword = "3des-cbc",
  87                 .algo = RTE_CRYPTO_CIPHER_3DES_CBC,
  88                 .iv_len = 8,
  89                 .block_size = 8,
  90                 .key_len = 24
  91         }
  92 };
  93
  94 const struct supported_auth_algo auth_algos[] = {
  95         {
  96                 .keyword = "null",
  97                 .algo = RTE_CRYPTO_AUTH_NULL,
  98                 .digest_len = 0,
  99                 .key_len = 0,
 100                 .key_not_req = 1
 101         },
 102         {
 103                 .keyword = "sha1-hmac",
 104                 .algo = RTE_CRYPTO_AUTH_SHA1_HMAC,
 105                 .digest_len = 12,
 106                 .key_len = 20
 107         },
 108         {
 109                 .keyword = "sha256-hmac",
 110                 .algo = RTE_CRYPTO_AUTH_SHA256_HMAC,
 111                 .digest_len = 12,
 112                 .key_len = 32
 113         }
 114 };
 115
 116 const struct supported_aead_algo aead_algos[] = {
 117         {
 118                 .keyword = "aes-128-gcm",
 119                 .algo = RTE_CRYPTO_AEAD_AES_GCM,
 120                 .iv_len = 8,
 121                 .block_size = 4,
 122                 .key_len = 20,
 123                 .digest_len = 16,
 124                 .aad_len = 8,
 125         }
 126 };
 127
 128 struct ipsec_sa sa_out[IPSEC_SA_MAX_ENTRIES];
 129 uint32_t nb_sa_out;
 130
 131 struct ipsec_sa sa_in[IPSEC_SA_MAX_ENTRIES];
 132 uint32_t nb_sa_in;
 133
 134 static const struct supported_cipher_algo *
 135 find_match_cipher_algo(const char *cipher_keyword)
 136 {
 137         size_t i;
 138
 139         for (i = 0; i < RTE_DIM(cipher_algos); i++) {
 140                 const struct supported_cipher_algo *algo =
 141                         &cipher_algos[i];
 142
 143                 if (strcmp(cipher_keyword, algo->keyword) == 0)
 144                         return algo;
 145         }
 146
 147         return NULL;
 148 }
 149
 150 static const struct supported_auth_algo *
 151 find_match_auth_algo(const char *auth_keyword)
 152 {
 153         size_t i;
 154
 155         for (i = 0; i < RTE_DIM(auth_algos); i++) {
 156                 const struct supported_auth_algo *algo =
 157                         &auth_algos[i];
 158
 159                 if (strcmp(auth_keyword, algo->keyword) == 0)
 160                         return algo;
 161         }
 162
 163         return NULL;
 164 }
 165
 166 static const struct supported_aead_algo *
 167 find_match_aead_algo(const char *aead_keyword)
 168 {
 169         size_t i;
 170
 171         for (i = 0; i < RTE_DIM(aead_algos); i++) {
 172                 const struct supported_aead_algo *algo =
 173                         &aead_algos[i];
 174
 175                 if (strcmp(aead_keyword, algo->keyword) == 0)
 176                         return algo;
 177         }
 178
 179         return NULL;
 180 }
 181
 182 /** parse_key_string
 183  *  parse x:x:x:x.... hex number key string into uint8_t *key
 184  *  return:
 185  *  > 0: number of bytes parsed
 186  *  0:   failed
 187  */
 188 static uint32_t
 189 parse_key_string(const char *key_str, uint8_t *key)
 190 {
 191         const char *pt_start = key_str, *pt_end = key_str;
 192         uint32_t nb_bytes = 0;
 193
 194         while (pt_end != NULL) {
 195                 char sub_str[3] = {0};
 196
 197                 pt_end = strchr(pt_start, ':');
 198
 199                 if (pt_end == NULL) {
 200                         if (strlen(pt_start) > 2)
 201                                 return 0;
 202                         strncpy(sub_str, pt_start, 2);
 203                 } else {
 204                         if (pt_end - pt_start > 2)
 205                                 return 0;
 206
 207                         strncpy(sub_str, pt_start, pt_end - pt_start);
 208                         pt_start = pt_end + 1;
 209                 }
 210
 211                 key[nb_bytes++] = strtol(sub_str, NULL, 16);
 212         }
 213
 214         return nb_bytes;
 215 }
 216
 217 void
 218 parse_sa_tokens(char **tokens, uint32_t n_tokens,
 219         struct parse_status *status)
 220 {
 221         struct ipsec_sa *rule = NULL;
 222         uint32_t ti; /*token index*/
 223         uint32_t *ri /*rule index*/;
 224         uint32_t cipher_algo_p = 0;
 225         uint32_t auth_algo_p = 0;
 226         uint32_t aead_algo_p = 0;
 227         uint32_t src_p = 0;
 228         uint32_t dst_p = 0;
 229         uint32_t mode_p = 0;
 230         uint32_t type_p = 0;
 231         uint32_t portid_p = 0;
 232
 233         if (strcmp(tokens[0], "in") == 0) {
 234                 ri = &nb_sa_in;
 235
 236                 APP_CHECK(*ri <= IPSEC_SA_MAX_ENTRIES - 1, status,
 237                         "too many sa rules, abort insertion\n");
 238                 if (status->status < 0)
 239                         return;
 240
 241                 rule = &sa_in[*ri];
 242         } else {
 243                 ri = &nb_sa_out;
 244
 245                 APP_CHECK(*ri <= IPSEC_SA_MAX_ENTRIES - 1, status,
 246                         "too many sa rules, abort insertion\n");
 247                 if (status->status < 0)
 248                         return;
 249
 250                 rule = &sa_out[*ri];
 251         }
 252
 253         /* spi number */
 254         APP_CHECK_TOKEN_IS_NUM(tokens, 1, status);
 255         if (status->status < 0)
 256                 return;
 257         if (atoi(tokens[1]) == INVALID_SPI)
 258                 return;
 259         rule->spi = atoi(tokens[1]);
 260
 261         for (ti = 2; ti < n_tokens; ti++) {
 262                 if (strcmp(tokens[ti], "mode") == 0) {
 263                         APP_CHECK_PRESENCE(mode_p, tokens[ti], status);
 264                         if (status->status < 0)
 265                                 return;
 266
 267                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 268                         if (status->status < 0)
 269                                 return;
 270
 271                         if (strcmp(tokens[ti], "ipv4-tunnel") == 0)
 272                                 rule->flags = IP4_TUNNEL;
 273                         else if (strcmp(tokens[ti], "ipv6-tunnel") == 0)
 274                                 rule->flags = IP6_TUNNEL;
 275                         else if (strcmp(tokens[ti], "transport") == 0)
 276                                 rule->flags = TRANSPORT;
 277                         else {
 278                                 APP_CHECK(0, status, "unrecognized "
 279                                         "input \"%s\"", tokens[ti]);
 280                                 return;
 281                         }
 282
 283                         mode_p = 1;
 284                         continue;
 285                 }
 286
 287                 if (strcmp(tokens[ti], "cipher_algo") == 0) {
 288                         const struct supported_cipher_algo *algo;
 289                         uint32_t key_len;
 290
 291                         APP_CHECK_PRESENCE(cipher_algo_p, tokens[ti],
 292                                 status);
 293                         if (status->status < 0)
 294                                 return;
 295
 296                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 297                         if (status->status < 0)
 298                                 return;
 299
 300                         algo = find_match_cipher_algo(tokens[ti]);
 301
 302                         APP_CHECK(algo != NULL, status, "unrecognized "
 303                                 "input \"%s\"", tokens[ti]);
 304
 305                         rule->cipher_algo = algo->algo;
 306                         rule->block_size = algo->block_size;
 307                         rule->iv_len = algo->iv_len;
 308                         rule->cipher_key_len = algo->key_len;
 309
 310                         /* for NULL algorithm, no cipher key required */
 311                         if (rule->cipher_algo == RTE_CRYPTO_CIPHER_NULL) {
 312                                 cipher_algo_p = 1;
 313                                 continue;
 314                         }
 315
 316                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 317                         if (status->status < 0)
 318                                 return;
 319
 320                         APP_CHECK(strcmp(tokens[ti], "cipher_key") == 0,
 321                                 status, "unrecognized input \"%s\", "
 322                                 "expect \"cipher_key\"", tokens[ti]);
 323                         if (status->status < 0)
 324                                 return;
 325
 326                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 327                         if (status->status < 0)
 328                                 return;
 329
 330                         key_len = parse_key_string(tokens[ti],
 331                                 rule->cipher_key);
 332                         APP_CHECK(key_len == rule->cipher_key_len, status,
 333                                 "unrecognized input \"%s\"", tokens[ti]);
 334                         if (status->status < 0)
 335                                 return;
 336
 337                         if (algo->algo == RTE_CRYPTO_CIPHER_AES_CBC ||
 338                                 algo->algo == RTE_CRYPTO_CIPHER_3DES_CBC)
 339                                 rule->salt = (uint32_t)rte_rand();
 340
 341                         if (algo->algo == RTE_CRYPTO_CIPHER_AES_CTR) {
 342                                 key_len -= 4;
 343                                 rule->cipher_key_len = key_len;
 344                                 memcpy(&rule->salt,
 345                                         &rule->cipher_key[key_len], 4);
 346                         }
 347
 348                         cipher_algo_p = 1;
 349                         continue;
 350                 }
 351
 352                 if (strcmp(tokens[ti], "auth_algo") == 0) {
 353                         const struct supported_auth_algo *algo;
 354                         uint32_t key_len;
 355
 356                         APP_CHECK_PRESENCE(auth_algo_p, tokens[ti],
 357                                 status);
 358                         if (status->status < 0)
 359                                 return;
 360
 361                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 362                         if (status->status < 0)
 363                                 return;
 364
 365                         algo = find_match_auth_algo(tokens[ti]);
 366                         APP_CHECK(algo != NULL, status, "unrecognized "
 367                                 "input \"%s\"", tokens[ti]);
 368
 369                         rule->auth_algo = algo->algo;
 370                         rule->auth_key_len = algo->key_len;
 371                         rule->digest_len = algo->digest_len;
 372
 373                         /* NULL algorithm and combined algos do not
 374                          * require auth key
 375                          */
 376                         if (algo->key_not_req) {
 377                                 auth_algo_p = 1;
 378                                 continue;
 379                         }
 380
 381                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 382                         if (status->status < 0)
 383                                 return;
 384
 385                         APP_CHECK(strcmp(tokens[ti], "auth_key") == 0,
 386                                 status, "unrecognized input \"%s\", "
 387                                 "expect \"auth_key\"", tokens[ti]);
 388                         if (status->status < 0)
 389                                 return;
 390
 391                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 392                         if (status->status < 0)
 393                                 return;
 394
 395                         key_len = parse_key_string(tokens[ti],
 396                                 rule->auth_key);
 397                         APP_CHECK(key_len == rule->auth_key_len, status,
 398                                 "unrecognized input \"%s\"", tokens[ti]);
 399                         if (status->status < 0)
 400                                 return;
 401
 402                         auth_algo_p = 1;
 403                         continue;
 404                 }
 405
 406                 if (strcmp(tokens[ti], "aead_algo") == 0) {
 407                         const struct supported_aead_algo *algo;
 408                         uint32_t key_len;
 409
 410                         APP_CHECK_PRESENCE(aead_algo_p, tokens[ti],
 411                                 status);
 412                         if (status->status < 0)
 413                                 return;
 414
 415                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 416                         if (status->status < 0)
 417                                 return;
 418
 419                         algo = find_match_aead_algo(tokens[ti]);
 420
 421                         APP_CHECK(algo != NULL, status, "unrecognized "
 422                                 "input \"%s\"", tokens[ti]);
 423
 424                         rule->aead_algo = algo->algo;
 425                         rule->cipher_key_len = algo->key_len;
 426                         rule->digest_len = algo->digest_len;
 427                         rule->aad_len = algo->aad_len;
 428                         rule->block_size = algo->block_size;
 429                         rule->iv_len = algo->iv_len;
 430
 431                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 432                         if (status->status < 0)
 433                                 return;
 434
 435                         APP_CHECK(strcmp(tokens[ti], "aead_key") == 0,
 436                                 status, "unrecognized input \"%s\", "
 437                                 "expect \"aead_key\"", tokens[ti]);
 438                         if (status->status < 0)
 439                                 return;
 440
 441                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 442                         if (status->status < 0)
 443                                 return;
 444
 445                         key_len = parse_key_string(tokens[ti],
 446                                 rule->cipher_key);
 447                         APP_CHECK(key_len == rule->cipher_key_len, status,
 448                                 "unrecognized input \"%s\"", tokens[ti]);
 449                         if (status->status < 0)
 450                                 return;
 451
 452                         key_len -= 4;
 453                         rule->cipher_key_len = key_len;
 454                         memcpy(&rule->salt,
 455                                 &rule->cipher_key[key_len], 4);
 456
 457                         aead_algo_p = 1;
 458                         continue;
 459                 }
 460
 461                 if (strcmp(tokens[ti], "src") == 0) {
 462                         APP_CHECK_PRESENCE(src_p, tokens[ti], status);
 463                         if (status->status < 0)
 464                                 return;
 465
 466                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 467                         if (status->status < 0)
 468                                 return;
 469
 470                         if (rule->flags == IP4_TUNNEL) {
 471                                 struct in_addr ip;
 472
 473                                 APP_CHECK(parse_ipv4_addr(tokens[ti],
 474                                         &ip, NULL) == 0, status,
 475                                         "unrecognized input \"%s\", "
 476                                         "expect valid ipv4 addr",
 477                                         tokens[ti]);
 478                                 if (status->status < 0)
 479                                         return;
 480                                 rule->src.ip.ip4 = rte_bswap32(
 481                                         (uint32_t)ip.s_addr);
 482                         } else if (rule->flags == IP6_TUNNEL) {
 483                                 struct in6_addr ip;
 484
 485                                 APP_CHECK(parse_ipv6_addr(tokens[ti], &ip,
 486                                         NULL) == 0, status,
 487                                         "unrecognized input \"%s\", "
 488                                         "expect valid ipv6 addr",
 489                                         tokens[ti]);
 490                                 if (status->status < 0)
 491                                         return;
 492                                 memcpy(rule->src.ip.ip6.ip6_b,
 493                                         ip.s6_addr, 16);
 494                         } else if (rule->flags == TRANSPORT) {
 495                                 APP_CHECK(0, status, "unrecognized input "
 496                                         "\"%s\"", tokens[ti]);
 497                                 return;
 498                         }
 499
 500                         src_p = 1;
 501                         continue;
 502                 }
 503
 504                 if (strcmp(tokens[ti], "dst") == 0) {
 505                         APP_CHECK_PRESENCE(dst_p, tokens[ti], status);
 506                         if (status->status < 0)
 507                                 return;
 508
 509                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 510                         if (status->status < 0)
 511                                 return;
 512
 513                         if (rule->flags == IP4_TUNNEL) {
 514                                 struct in_addr ip;
 515
 516                                 APP_CHECK(parse_ipv4_addr(tokens[ti],
 517                                         &ip, NULL) == 0, status,
 518                                         "unrecognized input \"%s\", "
 519                                         "expect valid ipv4 addr",
 520                                         tokens[ti]);
 521                                 if (status->status < 0)
 522                                         return;
 523                                 rule->dst.ip.ip4 = rte_bswap32(
 524                                         (uint32_t)ip.s_addr);
 525                         } else if (rule->flags == IP6_TUNNEL) {
 526                                 struct in6_addr ip;
 527
 528                                 APP_CHECK(parse_ipv6_addr(tokens[ti], &ip,
 529                                         NULL) == 0, status,
 530                                         "unrecognized input \"%s\", "
 531                                         "expect valid ipv6 addr",
 532                                         tokens[ti]);
 533                                 if (status->status < 0)
 534                                         return;
 535                                 memcpy(rule->dst.ip.ip6.ip6_b, ip.s6_addr, 16);
 536                         } else if (rule->flags == TRANSPORT) {
 537                                 APP_CHECK(0, status, "unrecognized "
 538                                         "input \"%s\"", tokens[ti]);
 539                                 return;
 540                         }
 541
 542                         dst_p = 1;
 543                         continue;
 544                 }
 545
 546                 if (strcmp(tokens[ti], "type") == 0) {
 547                         APP_CHECK_PRESENCE(type_p, tokens[ti], status);
 548                         if (status->status < 0)
 549                                 return;
 550
 551                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 552                         if (status->status < 0)
 553                                 return;
 554
 555                         if (strcmp(tokens[ti], "inline-crypto-offload") == 0)
 556                                 rule->type =
 557                                         RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO;
 558                         else if (strcmp(tokens[ti],
 559                                         "inline-protocol-offload") == 0)
 560                                 rule->type =
 561                                 RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL;
 562                         else if (strcmp(tokens[ti],
 563                                         "lookaside-protocol-offload") == 0)
 564                                 rule->type =
 565                                 RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL;
 566                         else if (strcmp(tokens[ti], "no-offload") == 0)
 567                                 rule->type = RTE_SECURITY_ACTION_TYPE_NONE;
 568                         else {
 569                                 APP_CHECK(0, status, "Invalid input \"%s\"",
 570                                                 tokens[ti]);
 571                                 return;
 572                         }
 573
 574                         type_p = 1;
 575                         continue;
 576                 }
 577
 578                 if (strcmp(tokens[ti], "port_id") == 0) {
 579                         APP_CHECK_PRESENCE(portid_p, tokens[ti], status);
 580                         if (status->status < 0)
 581                                 return;
 582                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 583                         if (status->status < 0)
 584                                 return;
 585                         rule->portid = atoi(tokens[ti]);
 586                         if (status->status < 0)
 587                                 return;
 588                         portid_p = 1;
 589                         continue;
 590                 }
 591
 592                 /* unrecognizeable input */
 593                 APP_CHECK(0, status, "unrecognized input \"%s\"",
 594                         tokens[ti]);
 595                 return;
 596         }
 597
 598         if (aead_algo_p) {
 599                 APP_CHECK(cipher_algo_p == 0, status,
 600                                 "AEAD used, no need for cipher options");
 601                 if (status->status < 0)
 602                         return;
 603
 604                 APP_CHECK(auth_algo_p == 0, status,
 605                                 "AEAD used, no need for auth options");
 606                 if (status->status < 0)
 607                         return;
 608         } else {
 609                 APP_CHECK(cipher_algo_p == 1, status, "missing cipher or AEAD options");
 610                 if (status->status < 0)
 611                         return;
 612
 613                 APP_CHECK(auth_algo_p == 1, status, "missing auth or AEAD options");
 614                 if (status->status < 0)
 615                         return;
 616         }
 617
 618         APP_CHECK(mode_p == 1, status, "missing mode option");
 619         if (status->status < 0)
 620                 return;
 621
 622         if ((rule->type != RTE_SECURITY_ACTION_TYPE_NONE) && (portid_p == 0))
 623                 printf("Missing portid option, falling back to non-offload\n");
 624
 625         if (!type_p || !portid_p) {
 626                 rule->type = RTE_SECURITY_ACTION_TYPE_NONE;
 627                 rule->portid = -1;
 628         }
 629
 630         *ri = *ri + 1;
 631 }
 632
 633 static inline void
 634 print_one_sa_rule(const struct ipsec_sa *sa, int inbound)
 635 {
 636         uint32_t i;
 637         uint8_t a, b, c, d;
 638
 639         printf("\tspi_%s(%3u):", inbound?"in":"out", sa->spi);
 640
 641         for (i = 0; i < RTE_DIM(cipher_algos); i++) {
 642                 if (cipher_algos[i].algo == sa->cipher_algo &&
 643                                 cipher_algos[i].key_len == sa->cipher_key_len) {
 644                         printf("%s ", cipher_algos[i].keyword);
 645                         break;
 646                 }
 647         }
 648
 649         for (i = 0; i < RTE_DIM(auth_algos); i++) {
 650                 if (auth_algos[i].algo == sa->auth_algo) {
 651                         printf("%s ", auth_algos[i].keyword);
 652                         break;
 653                 }
 654         }
 655
 656         for (i = 0; i < RTE_DIM(aead_algos); i++) {
 657                 if (aead_algos[i].algo == sa->aead_algo) {
 658                         printf("%s ", aead_algos[i].keyword);
 659                         break;
 660                 }
 661         }
 662
 663         printf("mode:");
 664
 665         switch (sa->flags) {
 666         case IP4_TUNNEL:
 667                 printf("IP4Tunnel ");
 668                 uint32_t_to_char(sa->src.ip.ip4, &a, &b, &c, &d);
 669                 printf("%hhu.%hhu.%hhu.%hhu ", d, c, b, a);
 670                 uint32_t_to_char(sa->dst.ip.ip4, &a, &b, &c, &d);
 671                 printf("%hhu.%hhu.%hhu.%hhu", d, c, b, a);
 672                 break;
 673         case IP6_TUNNEL:
 674                 printf("IP6Tunnel ");
 675                 for (i = 0; i < 16; i++) {
 676                         if (i % 2 && i != 15)
 677                                 printf("%.2x:", sa->src.ip.ip6.ip6_b[i]);
 678                         else
 679                                 printf("%.2x", sa->src.ip.ip6.ip6_b[i]);
 680                 }
 681                 printf(" ");
 682                 for (i = 0; i < 16; i++) {
 683                         if (i % 2 && i != 15)
 684                                 printf("%.2x:", sa->dst.ip.ip6.ip6_b[i]);
 685                         else
 686                                 printf("%.2x", sa->dst.ip.ip6.ip6_b[i]);
 687                 }
 688                 break;
 689         case TRANSPORT:
 690                 printf("Transport");
 691                 break;
 692         }
 693         printf("\n");
 694 }
 695
 696 struct sa_ctx {
 697         struct ipsec_sa sa[IPSEC_SA_MAX_ENTRIES];
 698         union {
 699                 struct {
 700                         struct rte_crypto_sym_xform a;
 701                         struct rte_crypto_sym_xform b;
 702                 };
 703         } xf[IPSEC_SA_MAX_ENTRIES];
 704 };
 705
 706 static struct sa_ctx *
 707 sa_create(const char *name, int32_t socket_id)
 708 {
 709         char s[PATH_MAX];
 710         struct sa_ctx *sa_ctx;
 711         uint32_t mz_size;
 712         const struct rte_memzone *mz;
 713
 714         snprintf(s, sizeof(s), "%s_%u", name, socket_id);
 715
 716         /* Create SA array table */
 717         printf("Creating SA context with %u maximum entries\n",
 718                         IPSEC_SA_MAX_ENTRIES);
 719
 720         mz_size = sizeof(struct sa_ctx);
 721         mz = rte_memzone_reserve(s, mz_size, socket_id,
 722                         RTE_MEMZONE_1GB | RTE_MEMZONE_SIZE_HINT_ONLY);
 723         if (mz == NULL) {
 724                 printf("Failed to allocate SA DB memory\n");
 725                 rte_errno = -ENOMEM;
 726                 return NULL;
 727         }
 728
 729         sa_ctx = (struct sa_ctx *)mz->addr;
 730
 731         return sa_ctx;
 732 }
 733
 734 static int
 735 check_eth_dev_caps(uint16_t portid, uint32_t inbound)
 736 {
 737         struct rte_eth_dev_info dev_info;
 738
 739         rte_eth_dev_info_get(portid, &dev_info);
 740
 741         if (inbound) {
 742                 if ((dev_info.rx_offload_capa &
 743                                 DEV_RX_OFFLOAD_SECURITY) == 0) {
 744                         RTE_LOG(WARNING, PORT,
 745                                 "hardware RX IPSec offload is not supported\n");
 746                         return -EINVAL;
 747                 }
 748
 749         } else { /* outbound */
 750                 if ((dev_info.tx_offload_capa &
 751                                 DEV_TX_OFFLOAD_SECURITY) == 0) {
 752                         RTE_LOG(WARNING, PORT,
 753                                 "hardware TX IPSec offload is not supported\n");
 754                         return -EINVAL;
 755                 }
 756         }
 757         return 0;
 758 }
 759
 760
 761 static int
 762 sa_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
 763                 uint32_t nb_entries, uint32_t inbound)
 764 {
 765         struct ipsec_sa *sa;
 766         uint32_t i, idx;
 767         uint16_t iv_length;
 768
 769         for (i = 0; i < nb_entries; i++) {
 770                 idx = SPI2IDX(entries[i].spi);
 771                 sa = &sa_ctx->sa[idx];
 772                 if (sa->spi != 0) {
 773                         printf("Index %u already in use by SPI %u\n",
 774                                         idx, sa->spi);
 775                         return -EINVAL;
 776                 }
 777                 *sa = entries[i];
 778                 sa->seq = 0;
 779
 780                 if (sa->type == RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL ||
 781                         sa->type == RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO) {
 782                         if (check_eth_dev_caps(sa->portid, inbound))
 783                                 return -EINVAL;
 784                 }
 785
 786                 sa->direction = (inbound == 1) ?
 787                                 RTE_SECURITY_IPSEC_SA_DIR_INGRESS :
 788                                 RTE_SECURITY_IPSEC_SA_DIR_EGRESS;
 789
 790                 switch (sa->flags) {
 791                 case IP4_TUNNEL:
 792                         sa->src.ip.ip4 = rte_cpu_to_be_32(sa->src.ip.ip4);
 793                         sa->dst.ip.ip4 = rte_cpu_to_be_32(sa->dst.ip.ip4);
 794                 }
 795
 796                 if (sa->aead_algo == RTE_CRYPTO_AEAD_AES_GCM) {
 797                         iv_length = 16;
 798
 799                         sa_ctx->xf[idx].a.type = RTE_CRYPTO_SYM_XFORM_AEAD;
 800                         sa_ctx->xf[idx].a.aead.algo = sa->aead_algo;
 801                         sa_ctx->xf[idx].a.aead.key.data = sa->cipher_key;
 802                         sa_ctx->xf[idx].a.aead.key.length =
 803                                 sa->cipher_key_len;
 804                         sa_ctx->xf[idx].a.aead.op = (inbound == 1) ?
 805                                 RTE_CRYPTO_AEAD_OP_DECRYPT :
 806                                 RTE_CRYPTO_AEAD_OP_ENCRYPT;
 807                         sa_ctx->xf[idx].a.next = NULL;
 808                         sa_ctx->xf[idx].a.aead.iv.offset = IV_OFFSET;
 809                         sa_ctx->xf[idx].a.aead.iv.length = iv_length;
 810                         sa_ctx->xf[idx].a.aead.aad_length =
 811                                 sa->aad_len;
 812                         sa_ctx->xf[idx].a.aead.digest_length =
 813                                 sa->digest_len;
 814
 815                         sa->xforms = &sa_ctx->xf[idx].a;
 816
 817                         print_one_sa_rule(sa, inbound);
 818                 } else {
 819                         switch (sa->cipher_algo) {
 820                         case RTE_CRYPTO_CIPHER_NULL:
 821                         case RTE_CRYPTO_CIPHER_3DES_CBC:
 822                         case RTE_CRYPTO_CIPHER_AES_CBC:
 823                                 iv_length = sa->iv_len;
 824                                 break;
 825                         case RTE_CRYPTO_CIPHER_AES_CTR:
 826                                 iv_length = 16;
 827                                 break;
 828                         default:
 829                                 RTE_LOG(ERR, IPSEC_ESP,
 830                                                 "unsupported cipher algorithm %u\n",
 831                                                 sa->cipher_algo);
 832                                 return -EINVAL;
 833                         }
 834
 835                         if (inbound) {
 836                                 sa_ctx->xf[idx].b.type = RTE_CRYPTO_SYM_XFORM_CIPHER;
 837                                 sa_ctx->xf[idx].b.cipher.algo = sa->cipher_algo;
 838                                 sa_ctx->xf[idx].b.cipher.key.data = sa->cipher_key;
 839                                 sa_ctx->xf[idx].b.cipher.key.length =
 840                                         sa->cipher_key_len;
 841                                 sa_ctx->xf[idx].b.cipher.op =
 842                                         RTE_CRYPTO_CIPHER_OP_DECRYPT;
 843                                 sa_ctx->xf[idx].b.next = NULL;
 844                                 sa_ctx->xf[idx].b.cipher.iv.offset = IV_OFFSET;
 845                                 sa_ctx->xf[idx].b.cipher.iv.length = iv_length;
 846
 847                                 sa_ctx->xf[idx].a.type = RTE_CRYPTO_SYM_XFORM_AUTH;
 848                                 sa_ctx->xf[idx].a.auth.algo = sa->auth_algo;
 849                                 sa_ctx->xf[idx].a.auth.key.data = sa->auth_key;
 850                                 sa_ctx->xf[idx].a.auth.key.length =
 851                                         sa->auth_key_len;
 852                                 sa_ctx->xf[idx].a.auth.digest_length =
 853                                         sa->digest_len;
 854                                 sa_ctx->xf[idx].a.auth.op =
 855                                         RTE_CRYPTO_AUTH_OP_VERIFY;
 856                         } else { /* outbound */
 857                                 sa_ctx->xf[idx].a.type = RTE_CRYPTO_SYM_XFORM_CIPHER;
 858                                 sa_ctx->xf[idx].a.cipher.algo = sa->cipher_algo;
 859                                 sa_ctx->xf[idx].a.cipher.key.data = sa->cipher_key;
 860                                 sa_ctx->xf[idx].a.cipher.key.length =
 861                                         sa->cipher_key_len;
 862                                 sa_ctx->xf[idx].a.cipher.op =
 863                                         RTE_CRYPTO_CIPHER_OP_ENCRYPT;
 864                                 sa_ctx->xf[idx].a.next = NULL;
 865                                 sa_ctx->xf[idx].a.cipher.iv.offset = IV_OFFSET;
 866                                 sa_ctx->xf[idx].a.cipher.iv.length = iv_length;
 867
 868                                 sa_ctx->xf[idx].b.type = RTE_CRYPTO_SYM_XFORM_AUTH;
 869                                 sa_ctx->xf[idx].b.auth.algo = sa->auth_algo;
 870                                 sa_ctx->xf[idx].b.auth.key.data = sa->auth_key;
 871                                 sa_ctx->xf[idx].b.auth.key.length =
 872                                         sa->auth_key_len;
 873                                 sa_ctx->xf[idx].b.auth.digest_length =
 874                                         sa->digest_len;
 875                                 sa_ctx->xf[idx].b.auth.op =
 876                                         RTE_CRYPTO_AUTH_OP_GENERATE;
 877                         }
 878
 879                         sa_ctx->xf[idx].a.next = &sa_ctx->xf[idx].b;
 880                         sa_ctx->xf[idx].b.next = NULL;
 881                         sa->xforms = &sa_ctx->xf[idx].a;
 882
 883                         print_one_sa_rule(sa, inbound);
 884                 }
 885         }
 886
 887         return 0;
 888 }
 889
 890 static inline int
 891 sa_out_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
 892                 uint32_t nb_entries)
 893 {
 894         return sa_add_rules(sa_ctx, entries, nb_entries, 0);
 895 }
 896
 897 static inline int
 898 sa_in_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
 899                 uint32_t nb_entries)
 900 {
 901         return sa_add_rules(sa_ctx, entries, nb_entries, 1);
 902 }
 903
 904 void
 905 sa_init(struct socket_ctx *ctx, int32_t socket_id)
 906 {
 907         const char *name;
 908
 909         if (ctx == NULL)
 910                 rte_exit(EXIT_FAILURE, "NULL context.\n");
 911
 912         if (ctx->sa_in != NULL)
 913                 rte_exit(EXIT_FAILURE, "Inbound SA DB for socket %u already "
 914                                 "initialized\n", socket_id);
 915
 916         if (ctx->sa_out != NULL)
 917                 rte_exit(EXIT_FAILURE, "Outbound SA DB for socket %u already "
 918                                 "initialized\n", socket_id);
 919
 920         if (nb_sa_in > 0) {
 921                 name = "sa_in";
 922                 ctx->sa_in = sa_create(name, socket_id);
 923                 if (ctx->sa_in == NULL)
 924                         rte_exit(EXIT_FAILURE, "Error [%d] creating SA "
 925                                 "context %s in socket %d\n", rte_errno,
 926                                 name, socket_id);
 927
 928                 sa_in_add_rules(ctx->sa_in, sa_in, nb_sa_in);
 929         } else
 930                 RTE_LOG(WARNING, IPSEC, "No SA Inbound rule specified\n");
 931
 932         if (nb_sa_out > 0) {
 933                 name = "sa_out";
 934                 ctx->sa_out = sa_create(name, socket_id);
 935                 if (ctx->sa_out == NULL)
 936                         rte_exit(EXIT_FAILURE, "Error [%d] creating SA "
 937                                 "context %s in socket %d\n", rte_errno,
 938                                 name, socket_id);
 939
 940                 sa_out_add_rules(ctx->sa_out, sa_out, nb_sa_out);
 941         } else
 942                 RTE_LOG(WARNING, IPSEC, "No SA Outbound rule "
 943                         "specified\n");
 944 }
 945
 946 int
 947 inbound_sa_check(struct sa_ctx *sa_ctx, struct rte_mbuf *m, uint32_t sa_idx)
 948 {
 949         struct ipsec_mbuf_metadata *priv;
 950
 951         priv = get_priv(m);
 952
 953         return (sa_ctx->sa[sa_idx].spi == priv->sa->spi);
 954 }
 955
 956 static inline void
 957 single_inbound_lookup(struct ipsec_sa *sadb, struct rte_mbuf *pkt,
 958                 struct ipsec_sa **sa_ret)
 959 {
 960         struct esp_hdr *esp;
 961         struct ip *ip;
 962         uint32_t *src4_addr;
 963         uint8_t *src6_addr;
 964         struct ipsec_sa *sa;
 965
 966         *sa_ret = NULL;
 967
 968         ip = rte_pktmbuf_mtod(pkt, struct ip *);
 969         if (ip->ip_v == IPVERSION)
 970                 esp = (struct esp_hdr *)(ip + 1);
 971         else
 972                 esp = (struct esp_hdr *)(((struct ip6_hdr *)ip) + 1);
 973
 974         if (esp->spi == INVALID_SPI)
 975                 return;
 976
 977         sa = &sadb[SPI2IDX(rte_be_to_cpu_32(esp->spi))];
 978         if (rte_be_to_cpu_32(esp->spi) != sa->spi)
 979                 return;
 980
 981         switch (sa->flags) {
 982         case IP4_TUNNEL:
 983                 src4_addr = RTE_PTR_ADD(ip, offsetof(struct ip, ip_src));
 984                 if ((ip->ip_v == IPVERSION) &&
 985                                 (sa->src.ip.ip4 == *src4_addr) &&
 986                                 (sa->dst.ip.ip4 == *(src4_addr + 1)))
 987                         *sa_ret = sa;
 988                 break;
 989         case IP6_TUNNEL:
 990                 src6_addr = RTE_PTR_ADD(ip, offsetof(struct ip6_hdr, ip6_src));
 991                 if ((ip->ip_v == IP6_VERSION) &&
 992                                 !memcmp(&sa->src.ip.ip6.ip6, src6_addr, 16) &&
 993                                 !memcmp(&sa->dst.ip.ip6.ip6, src6_addr + 16, 16))
 994                         *sa_ret = sa;
 995                 break;
 996         case TRANSPORT:
 997                 *sa_ret = sa;
 998         }
 999 }
1000
1001 void
1002 inbound_sa_lookup(struct sa_ctx *sa_ctx, struct rte_mbuf *pkts[],
1003                 struct ipsec_sa *sa[], uint16_t nb_pkts)
1004 {
1005         uint32_t i;
1006
1007         for (i = 0; i < nb_pkts; i++)
1008                 single_inbound_lookup(sa_ctx->sa, pkts[i], &sa[i]);
1009 }
1010
1011 void
1012 outbound_sa_lookup(struct sa_ctx *sa_ctx, uint32_t sa_idx[],
1013                 struct ipsec_sa *sa[], uint16_t nb_pkts)
1014 {
1015         uint32_t i;
1016
1017         for (i = 0; i < nb_pkts; i++)
1018                 sa[i] = &sa_ctx->sa[sa_idx[i]];
1019 }