examples/ipsec-secgw/sa.c

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