examples/ipsec-secgw/sa.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2016 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 aad_len;
  68         uint8_t key_not_req;
  69 };
  70
  71 const struct supported_cipher_algo cipher_algos[] = {
  72         {
  73                 .keyword = "null",
  74                 .algo = RTE_CRYPTO_CIPHER_NULL,
  75                 .iv_len = 0,
  76                 .block_size = 4,
  77                 .key_len = 0
  78         },
  79         {
  80                 .keyword = "aes-128-cbc",
  81                 .algo = RTE_CRYPTO_CIPHER_AES_CBC,
  82                 .iv_len = 16,
  83                 .block_size = 16,
  84                 .key_len = 16
  85         },
  86         {
  87                 .keyword = "aes-128-gcm",
  88                 .algo = RTE_CRYPTO_CIPHER_AES_GCM,
  89                 .iv_len = 8,
  90                 .block_size = 4,
  91                 .key_len = 20
  92         },
  93         {
  94                 .keyword = "aes-128-ctr",
  95                 .algo = RTE_CRYPTO_CIPHER_AES_CTR,
  96                 .iv_len = 8,
  97                 .block_size = 16, /* XXX AESNI MB limition, should be 4 */
  98                 .key_len = 20
  99         }
 100 };
 101
 102 const struct supported_auth_algo auth_algos[] = {
 103         {
 104                 .keyword = "null",
 105                 .algo = RTE_CRYPTO_AUTH_NULL,
 106                 .digest_len = 0,
 107                 .key_len = 0,
 108                 .key_not_req = 1
 109         },
 110         {
 111                 .keyword = "sha1-hmac",
 112                 .algo = RTE_CRYPTO_AUTH_SHA1_HMAC,
 113                 .digest_len = 12,
 114                 .key_len = 20
 115         },
 116         {
 117                 .keyword = "aes-128-gcm",
 118                 .algo = RTE_CRYPTO_AUTH_AES_GCM,
 119                 .digest_len = 16,
 120                 .aad_len = 8,
 121                 .key_not_req = 1
 122         }
 123 };
 124
 125 struct ipsec_sa sa_out[IPSEC_SA_MAX_ENTRIES];
 126 uint32_t nb_sa_out;
 127
 128 struct ipsec_sa sa_in[IPSEC_SA_MAX_ENTRIES];
 129 uint32_t nb_sa_in;
 130
 131 static const struct supported_cipher_algo *
 132 find_match_cipher_algo(const char *cipher_keyword)
 133 {
 134         size_t i;
 135
 136         for (i = 0; i < RTE_DIM(cipher_algos); i++) {
 137                 const struct supported_cipher_algo *algo =
 138                         &cipher_algos[i];
 139
 140                 if (strcmp(cipher_keyword, algo->keyword) == 0)
 141                         return algo;
 142         }
 143
 144         return NULL;
 145 }
 146
 147 static const struct supported_auth_algo *
 148 find_match_auth_algo(const char *auth_keyword)
 149 {
 150         size_t i;
 151
 152         for (i = 0; i < RTE_DIM(auth_algos); i++) {
 153                 const struct supported_auth_algo *algo =
 154                         &auth_algos[i];
 155
 156                 if (strcmp(auth_keyword, algo->keyword) == 0)
 157                         return algo;
 158         }
 159
 160         return NULL;
 161 }
 162
 163 /** parse_key_string
 164  *  parse x:x:x:x.... hex number key string into uint8_t *key
 165  *  return:
 166  *  > 0: number of bytes parsed
 167  *  0:   failed
 168  */
 169 static uint32_t
 170 parse_key_string(const char *key_str, uint8_t *key)
 171 {
 172         const char *pt_start = key_str, *pt_end = key_str;
 173         uint32_t nb_bytes = 0;
 174
 175         while (pt_end != NULL) {
 176                 char sub_str[3] = {0};
 177
 178                 pt_end = strchr(pt_start, ':');
 179
 180                 if (pt_end == NULL) {
 181                         if (strlen(pt_start) > 2)
 182                                 return 0;
 183                         strncpy(sub_str, pt_start, 2);
 184                 } else {
 185                         if (pt_end - pt_start > 2)
 186                                 return 0;
 187
 188                         strncpy(sub_str, pt_start, pt_end - pt_start);
 189                         pt_start = pt_end + 1;
 190                 }
 191
 192                 key[nb_bytes++] = strtol(sub_str, NULL, 16);
 193         }
 194
 195         return nb_bytes;
 196 }
 197
 198 void
 199 parse_sa_tokens(char **tokens, uint32_t n_tokens,
 200         struct parse_status *status)
 201 {
 202         struct ipsec_sa *rule = NULL;
 203         uint32_t ti; /*token index*/
 204         uint32_t *ri /*rule index*/;
 205         uint32_t cipher_algo_p = 0;
 206         uint32_t auth_algo_p = 0;
 207         uint32_t src_p = 0;
 208         uint32_t dst_p = 0;
 209         uint32_t mode_p = 0;
 210
 211         if (strcmp(tokens[0], "in") == 0) {
 212                 ri = &nb_sa_in;
 213
 214                 APP_CHECK(*ri <= IPSEC_SA_MAX_ENTRIES - 1, status,
 215                         "too many sa rules, abort insertion\n");
 216                 if (status->status < 0)
 217                         return;
 218
 219                 rule = &sa_in[*ri];
 220         } else {
 221                 ri = &nb_sa_out;
 222
 223                 APP_CHECK(*ri <= IPSEC_SA_MAX_ENTRIES - 1, status,
 224                         "too many sa rules, abort insertion\n");
 225                 if (status->status < 0)
 226                         return;
 227
 228                 rule = &sa_out[*ri];
 229         }
 230
 231         /* spi number */
 232         APP_CHECK_TOKEN_IS_NUM(tokens, 1, status);
 233         if (status->status < 0)
 234                 return;
 235         if (atoi(tokens[1]) == INVALID_SPI)
 236                 return;
 237         rule->spi = atoi(tokens[1]);
 238
 239         for (ti = 2; ti < n_tokens; ti++) {
 240                 if (strcmp(tokens[ti], "mode") == 0) {
 241                         APP_CHECK_PRESENCE(mode_p, tokens[ti], status);
 242                         if (status->status < 0)
 243                                 return;
 244
 245                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 246                         if (status->status < 0)
 247                                 return;
 248
 249                         if (strcmp(tokens[ti], "ipv4-tunnel") == 0)
 250                                 rule->flags = IP4_TUNNEL;
 251                         else if (strcmp(tokens[ti], "ipv6-tunnel") == 0)
 252                                 rule->flags = IP6_TUNNEL;
 253                         else if (strcmp(tokens[ti], "transport") == 0)
 254                                 rule->flags = TRANSPORT;
 255                         else {
 256                                 APP_CHECK(0, status, "unrecognized "
 257                                         "input \"%s\"", tokens[ti]);
 258                                 return;
 259                         }
 260
 261                         mode_p = 1;
 262                         continue;
 263                 }
 264
 265                 if (strcmp(tokens[ti], "cipher_algo") == 0) {
 266                         const struct supported_cipher_algo *algo;
 267                         uint32_t key_len;
 268
 269                         APP_CHECK_PRESENCE(cipher_algo_p, tokens[ti],
 270                                 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                         algo = find_match_cipher_algo(tokens[ti]);
 279
 280                         APP_CHECK(algo != NULL, status, "unrecognized "
 281                                 "input \"%s\"", tokens[ti]);
 282
 283                         rule->cipher_algo = algo->algo;
 284                         rule->block_size = algo->block_size;
 285                         rule->iv_len = algo->iv_len;
 286                         rule->cipher_key_len = algo->key_len;
 287
 288                         /* for NULL algorithm, no cipher key required */
 289                         if (rule->cipher_algo == RTE_CRYPTO_CIPHER_NULL) {
 290                                 cipher_algo_p = 1;
 291                                 continue;
 292                         }
 293
 294                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 295                         if (status->status < 0)
 296                                 return;
 297
 298                         APP_CHECK(strcmp(tokens[ti], "cipher_key") == 0,
 299                                 status, "unrecognized input \"%s\", "
 300                                 "expect \"cipher_key\"", tokens[ti]);
 301                         if (status->status < 0)
 302                                 return;
 303
 304                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 305                         if (status->status < 0)
 306                                 return;
 307
 308                         key_len = parse_key_string(tokens[ti],
 309                                 rule->cipher_key);
 310                         APP_CHECK(key_len == rule->cipher_key_len, status,
 311                                 "unrecognized input \"%s\"", tokens[ti]);
 312                         if (status->status < 0)
 313                                 return;
 314
 315                         if (algo->algo == RTE_CRYPTO_CIPHER_AES_CBC)
 316                                 rule->salt = (uint32_t)rte_rand();
 317
 318                         if ((algo->algo == RTE_CRYPTO_CIPHER_AES_CTR) ||
 319                                 (algo->algo == RTE_CRYPTO_CIPHER_AES_GCM)) {
 320                                 key_len -= 4;
 321                                 rule->cipher_key_len = key_len;
 322                                 memcpy(&rule->salt,
 323                                         &rule->cipher_key[key_len], 4);
 324                         }
 325
 326                         cipher_algo_p = 1;
 327                         continue;
 328                 }
 329
 330                 if (strcmp(tokens[ti], "auth_algo") == 0) {
 331                         const struct supported_auth_algo *algo;
 332                         uint32_t key_len;
 333
 334                         APP_CHECK_PRESENCE(auth_algo_p, tokens[ti],
 335                                 status);
 336                         if (status->status < 0)
 337                                 return;
 338
 339                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 340                         if (status->status < 0)
 341                                 return;
 342
 343                         algo = find_match_auth_algo(tokens[ti]);
 344                         APP_CHECK(algo != NULL, status, "unrecognized "
 345                                 "input \"%s\"", tokens[ti]);
 346
 347                         rule->auth_algo = algo->algo;
 348                         rule->auth_key_len = algo->key_len;
 349                         rule->digest_len = algo->digest_len;
 350                         rule->aad_len = algo->key_len;
 351
 352                         /* NULL algorithm and combined algos do not
 353                          * require auth key
 354                          */
 355                         if (algo->key_not_req) {
 356                                 auth_algo_p = 1;
 357                                 continue;
 358                         }
 359
 360                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 361                         if (status->status < 0)
 362                                 return;
 363
 364                         APP_CHECK(strcmp(tokens[ti], "auth_key") == 0,
 365                                 status, "unrecognized input \"%s\", "
 366                                 "expect \"auth_key\"", tokens[ti]);
 367                         if (status->status < 0)
 368                                 return;
 369
 370                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 371                         if (status->status < 0)
 372                                 return;
 373
 374                         key_len = parse_key_string(tokens[ti],
 375                                 rule->auth_key);
 376                         APP_CHECK(key_len == rule->auth_key_len, status,
 377                                 "unrecognized input \"%s\"", tokens[ti]);
 378                         if (status->status < 0)
 379                                 return;
 380
 381                         auth_algo_p = 1;
 382                         continue;
 383                 }
 384
 385                 if (strcmp(tokens[ti], "src") == 0) {
 386                         APP_CHECK_PRESENCE(src_p, tokens[ti], status);
 387                         if (status->status < 0)
 388                                 return;
 389
 390                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 391                         if (status->status < 0)
 392                                 return;
 393
 394                         if (rule->flags == IP4_TUNNEL) {
 395                                 struct in_addr ip;
 396
 397                                 APP_CHECK(parse_ipv4_addr(tokens[ti],
 398                                         &ip, NULL) == 0, status,
 399                                         "unrecognized input \"%s\", "
 400                                         "expect valid ipv4 addr",
 401                                         tokens[ti]);
 402                                 if (status->status < 0)
 403                                         return;
 404                                 rule->src.ip.ip4 = rte_bswap32(
 405                                         (uint32_t)ip.s_addr);
 406                         } else if (rule->flags == IP6_TUNNEL) {
 407                                 struct in6_addr ip;
 408
 409                                 APP_CHECK(parse_ipv6_addr(tokens[ti], &ip,
 410                                         NULL) == 0, status,
 411                                         "unrecognized input \"%s\", "
 412                                         "expect valid ipv6 addr",
 413                                         tokens[ti]);
 414                                 if (status->status < 0)
 415                                         return;
 416                                 memcpy(rule->src.ip.ip6.ip6_b,
 417                                         ip.s6_addr, 16);
 418                         } else if (rule->flags == TRANSPORT) {
 419                                 APP_CHECK(0, status, "unrecognized input "
 420                                         "\"%s\"", tokens[ti]);
 421                                 return;
 422                         }
 423
 424                         src_p = 1;
 425                         continue;
 426                 }
 427
 428                 if (strcmp(tokens[ti], "dst") == 0) {
 429                         APP_CHECK_PRESENCE(dst_p, tokens[ti], status);
 430                         if (status->status < 0)
 431                                 return;
 432
 433                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 434                         if (status->status < 0)
 435                                 return;
 436
 437                         if (rule->flags == IP4_TUNNEL) {
 438                                 struct in_addr ip;
 439
 440                                 APP_CHECK(parse_ipv4_addr(tokens[ti],
 441                                         &ip, NULL) == 0, status,
 442                                         "unrecognized input \"%s\", "
 443                                         "expect valid ipv4 addr",
 444                                         tokens[ti]);
 445                                 if (status->status < 0)
 446                                         return;
 447                                 rule->dst.ip.ip4 = rte_bswap32(
 448                                         (uint32_t)ip.s_addr);
 449                         } else if (rule->flags == IP6_TUNNEL) {
 450                                 struct in6_addr ip;
 451
 452                                 APP_CHECK(parse_ipv6_addr(tokens[ti], &ip,
 453                                         NULL) == 0, status,
 454                                         "unrecognized input \"%s\", "
 455                                         "expect valid ipv6 addr",
 456                                         tokens[ti]);
 457                                 if (status->status < 0)
 458                                         return;
 459                                 memcpy(rule->dst.ip.ip6.ip6_b, ip.s6_addr, 16);
 460                         } else if (rule->flags == TRANSPORT) {
 461                                 APP_CHECK(0, status, "unrecognized "
 462                                         "input \"%s\"", tokens[ti]);
 463                                 return;
 464                         }
 465
 466                         dst_p = 1;
 467                         continue;
 468                 }
 469
 470                 /* unrecognizeable input */
 471                 APP_CHECK(0, status, "unrecognized input \"%s\"",
 472                         tokens[ti]);
 473                 return;
 474         }
 475
 476         APP_CHECK(cipher_algo_p == 1, status, "missing cipher options");
 477         if (status->status < 0)
 478                 return;
 479
 480         APP_CHECK(auth_algo_p == 1, status, "missing auth options");
 481         if (status->status < 0)
 482                 return;
 483
 484         APP_CHECK(mode_p == 1, status, "missing mode option");
 485         if (status->status < 0)
 486                 return;
 487
 488         *ri = *ri + 1;
 489 }
 490
 491 static inline void
 492 print_one_sa_rule(const struct ipsec_sa *sa, int inbound)
 493 {
 494         uint32_t i;
 495         uint8_t a, b, c, d;
 496
 497         printf("\tspi_%s(%3u):", inbound?"in":"out", sa->spi);
 498
 499         for (i = 0; i < RTE_DIM(cipher_algos); i++) {
 500                 if (cipher_algos[i].algo == sa->cipher_algo) {
 501                         printf("%s ", cipher_algos[i].keyword);
 502                         break;
 503                 }
 504         }
 505
 506         for (i = 0; i < RTE_DIM(auth_algos); i++) {
 507                 if (auth_algos[i].algo == sa->auth_algo) {
 508                         printf("%s ", auth_algos[i].keyword);
 509                         break;
 510                 }
 511         }
 512
 513         printf("mode:");
 514
 515         switch (sa->flags) {
 516         case IP4_TUNNEL:
 517                 printf("IP4Tunnel ");
 518                 uint32_t_to_char(sa->src.ip.ip4, &a, &b, &c, &d);
 519                 printf("%hhu.%hhu.%hhu.%hhu ", d, c, b, a);
 520                 uint32_t_to_char(sa->dst.ip.ip4, &a, &b, &c, &d);
 521                 printf("%hhu.%hhu.%hhu.%hhu", d, c, b, a);
 522                 break;
 523         case IP6_TUNNEL:
 524                 printf("IP6Tunnel ");
 525                 for (i = 0; i < 16; i++) {
 526                         if (i % 2 && i != 15)
 527                                 printf("%.2x:", sa->src.ip.ip6.ip6_b[i]);
 528                         else
 529                                 printf("%.2x", sa->src.ip.ip6.ip6_b[i]);
 530                 }
 531                 printf(" ");
 532                 for (i = 0; i < 16; i++) {
 533                         if (i % 2 && i != 15)
 534                                 printf("%.2x:", sa->dst.ip.ip6.ip6_b[i]);
 535                         else
 536                                 printf("%.2x", sa->dst.ip.ip6.ip6_b[i]);
 537                 }
 538                 break;
 539         case TRANSPORT:
 540                 printf("Transport");
 541                 break;
 542         }
 543         printf("\n");
 544 }
 545
 546 struct sa_ctx {
 547         struct ipsec_sa sa[IPSEC_SA_MAX_ENTRIES];
 548         struct {
 549                 struct rte_crypto_sym_xform a;
 550                 struct rte_crypto_sym_xform b;
 551         } xf[IPSEC_SA_MAX_ENTRIES];
 552 };
 553
 554 static struct sa_ctx *
 555 sa_create(const char *name, int32_t socket_id)
 556 {
 557         char s[PATH_MAX];
 558         struct sa_ctx *sa_ctx;
 559         uint32_t mz_size;
 560         const struct rte_memzone *mz;
 561
 562         snprintf(s, sizeof(s), "%s_%u", name, socket_id);
 563
 564         /* Create SA array table */
 565         printf("Creating SA context with %u maximum entries\n",
 566                         IPSEC_SA_MAX_ENTRIES);
 567
 568         mz_size = sizeof(struct sa_ctx);
 569         mz = rte_memzone_reserve(s, mz_size, socket_id,
 570                         RTE_MEMZONE_1GB | RTE_MEMZONE_SIZE_HINT_ONLY);
 571         if (mz == NULL) {
 572                 printf("Failed to allocate SA DB memory\n");
 573                 rte_errno = -ENOMEM;
 574                 return NULL;
 575         }
 576
 577         sa_ctx = (struct sa_ctx *)mz->addr;
 578
 579         return sa_ctx;
 580 }
 581
 582 static int
 583 sa_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
 584                 uint32_t nb_entries, uint32_t inbound)
 585 {
 586         struct ipsec_sa *sa;
 587         uint32_t i, idx;
 588
 589         for (i = 0; i < nb_entries; i++) {
 590                 idx = SPI2IDX(entries[i].spi);
 591                 sa = &sa_ctx->sa[idx];
 592                 if (sa->spi != 0) {
 593                         printf("Index %u already in use by SPI %u\n",
 594                                         idx, sa->spi);
 595                         return -EINVAL;
 596                 }
 597                 *sa = entries[i];
 598                 sa->seq = 0;
 599
 600                 switch (sa->flags) {
 601                 case IP4_TUNNEL:
 602                         sa->src.ip.ip4 = rte_cpu_to_be_32(sa->src.ip.ip4);
 603                         sa->dst.ip.ip4 = rte_cpu_to_be_32(sa->dst.ip.ip4);
 604                 }
 605
 606                 if (inbound) {
 607                         sa_ctx->xf[idx].b.type = RTE_CRYPTO_SYM_XFORM_CIPHER;
 608                         sa_ctx->xf[idx].b.cipher.algo = sa->cipher_algo;
 609                         sa_ctx->xf[idx].b.cipher.key.data = sa->cipher_key;
 610                         sa_ctx->xf[idx].b.cipher.key.length =
 611                                 sa->cipher_key_len;
 612                         sa_ctx->xf[idx].b.cipher.op =
 613                                 RTE_CRYPTO_CIPHER_OP_DECRYPT;
 614                         sa_ctx->xf[idx].b.next = NULL;
 615
 616                         sa_ctx->xf[idx].a.type = RTE_CRYPTO_SYM_XFORM_AUTH;
 617                         sa_ctx->xf[idx].a.auth.algo = sa->auth_algo;
 618                         sa_ctx->xf[idx].a.auth.add_auth_data_length =
 619                                 sa->aad_len;
 620                         sa_ctx->xf[idx].a.auth.key.data = sa->auth_key;
 621                         sa_ctx->xf[idx].a.auth.key.length =
 622                                 sa->auth_key_len;
 623                         sa_ctx->xf[idx].a.auth.digest_length =
 624                                 sa->digest_len;
 625                         sa_ctx->xf[idx].a.auth.op =
 626                                 RTE_CRYPTO_AUTH_OP_VERIFY;
 627
 628                 } else { /* outbound */
 629                         sa_ctx->xf[idx].a.type = RTE_CRYPTO_SYM_XFORM_CIPHER;
 630                         sa_ctx->xf[idx].a.cipher.algo = sa->cipher_algo;
 631                         sa_ctx->xf[idx].a.cipher.key.data = sa->cipher_key;
 632                         sa_ctx->xf[idx].a.cipher.key.length =
 633                                 sa->cipher_key_len;
 634                         sa_ctx->xf[idx].a.cipher.op =
 635                                 RTE_CRYPTO_CIPHER_OP_ENCRYPT;
 636                         sa_ctx->xf[idx].a.next = NULL;
 637
 638                         sa_ctx->xf[idx].b.type = RTE_CRYPTO_SYM_XFORM_AUTH;
 639                         sa_ctx->xf[idx].b.auth.algo = sa->auth_algo;
 640                         sa_ctx->xf[idx].b.auth.add_auth_data_length =
 641                                 sa->aad_len;
 642                         sa_ctx->xf[idx].b.auth.key.data = sa->auth_key;
 643                         sa_ctx->xf[idx].b.auth.key.length =
 644                                 sa->auth_key_len;
 645                         sa_ctx->xf[idx].b.auth.digest_length =
 646                                 sa->digest_len;
 647                         sa_ctx->xf[idx].b.auth.op =
 648                                 RTE_CRYPTO_AUTH_OP_GENERATE;
 649                 }
 650
 651                 sa_ctx->xf[idx].a.next = &sa_ctx->xf[idx].b;
 652                 sa_ctx->xf[idx].b.next = NULL;
 653                 sa->xforms = &sa_ctx->xf[idx].a;
 654
 655                 print_one_sa_rule(sa, inbound);
 656         }
 657
 658         return 0;
 659 }
 660
 661 static inline int
 662 sa_out_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
 663                 uint32_t nb_entries)
 664 {
 665         return sa_add_rules(sa_ctx, entries, nb_entries, 0);
 666 }
 667
 668 static inline int
 669 sa_in_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
 670                 uint32_t nb_entries)
 671 {
 672         return sa_add_rules(sa_ctx, entries, nb_entries, 1);
 673 }
 674
 675 void
 676 sa_init(struct socket_ctx *ctx, int32_t socket_id)
 677 {
 678         const char *name;
 679
 680         if (ctx == NULL)
 681                 rte_exit(EXIT_FAILURE, "NULL context.\n");
 682
 683         if (ctx->sa_in != NULL)
 684                 rte_exit(EXIT_FAILURE, "Inbound SA DB for socket %u already "
 685                                 "initialized\n", socket_id);
 686
 687         if (ctx->sa_out != NULL)
 688                 rte_exit(EXIT_FAILURE, "Outbound SA DB for socket %u already "
 689                                 "initialized\n", socket_id);
 690
 691         if (nb_sa_in > 0) {
 692                 name = "sa_in";
 693                 ctx->sa_in = sa_create(name, socket_id);
 694                 if (ctx->sa_in == NULL)
 695                         rte_exit(EXIT_FAILURE, "Error [%d] creating SA "
 696                                 "context %s in socket %d\n", rte_errno,
 697                                 name, socket_id);
 698
 699                 sa_in_add_rules(ctx->sa_in, sa_in, nb_sa_in);
 700         } else
 701                 RTE_LOG(WARNING, IPSEC, "No SA Inbound rule specified\n");
 702
 703         if (nb_sa_out > 0) {
 704                 name = "sa_out";
 705                 ctx->sa_out = sa_create(name, socket_id);
 706                 if (ctx->sa_out == NULL)
 707                         rte_exit(EXIT_FAILURE, "Error [%d] creating SA "
 708                                 "context %s in socket %d\n", rte_errno,
 709                                 name, socket_id);
 710
 711                 sa_out_add_rules(ctx->sa_out, sa_out, nb_sa_out);
 712         } else
 713                 RTE_LOG(WARNING, IPSEC, "No SA Outbound rule "
 714                         "specified\n");
 715 }
 716
 717 int
 718 inbound_sa_check(struct sa_ctx *sa_ctx, struct rte_mbuf *m, uint32_t sa_idx)
 719 {
 720         struct ipsec_mbuf_metadata *priv;
 721
 722         priv = RTE_PTR_ADD(m, sizeof(struct rte_mbuf));
 723
 724         return (sa_ctx->sa[sa_idx].spi == priv->sa->spi);
 725 }
 726
 727 static inline void
 728 single_inbound_lookup(struct ipsec_sa *sadb, struct rte_mbuf *pkt,
 729                 struct ipsec_sa **sa_ret)
 730 {
 731         struct esp_hdr *esp;
 732         struct ip *ip;
 733         uint32_t *src4_addr;
 734         uint8_t *src6_addr;
 735         struct ipsec_sa *sa;
 736
 737         *sa_ret = NULL;
 738
 739         ip = rte_pktmbuf_mtod(pkt, struct ip *);
 740         if (ip->ip_v == IPVERSION)
 741                 esp = (struct esp_hdr *)(ip + 1);
 742         else
 743                 esp = (struct esp_hdr *)(((struct ip6_hdr *)ip) + 1);
 744
 745         if (esp->spi == INVALID_SPI)
 746                 return;
 747
 748         sa = &sadb[SPI2IDX(rte_be_to_cpu_32(esp->spi))];
 749         if (rte_be_to_cpu_32(esp->spi) != sa->spi)
 750                 return;
 751
 752         switch (sa->flags) {
 753         case IP4_TUNNEL:
 754                 src4_addr = RTE_PTR_ADD(ip, offsetof(struct ip, ip_src));
 755                 if ((ip->ip_v == IPVERSION) &&
 756                                 (sa->src.ip.ip4 == *src4_addr) &&
 757                                 (sa->dst.ip.ip4 == *(src4_addr + 1)))
 758                         *sa_ret = sa;
 759                 break;
 760         case IP6_TUNNEL:
 761                 src6_addr = RTE_PTR_ADD(ip, offsetof(struct ip6_hdr, ip6_src));
 762                 if ((ip->ip_v == IP6_VERSION) &&
 763                                 !memcmp(&sa->src.ip.ip6.ip6, src6_addr, 16) &&
 764                                 !memcmp(&sa->dst.ip.ip6.ip6, src6_addr + 16, 16))
 765                         *sa_ret = sa;
 766                 break;
 767         case TRANSPORT:
 768                 *sa_ret = sa;
 769         }
 770 }
 771
 772 void
 773 inbound_sa_lookup(struct sa_ctx *sa_ctx, struct rte_mbuf *pkts[],
 774                 struct ipsec_sa *sa[], uint16_t nb_pkts)
 775 {
 776         uint32_t i;
 777
 778         for (i = 0; i < nb_pkts; i++)
 779                 single_inbound_lookup(sa_ctx->sa, pkts[i], &sa[i]);
 780 }
 781
 782 void
 783 outbound_sa_lookup(struct sa_ctx *sa_ctx, uint32_t sa_idx[],
 784                 struct ipsec_sa *sa[], uint16_t nb_pkts)
 785 {
 786         uint32_t i;
 787
 788         for (i = 0; i < nb_pkts; i++)
 789                 sa[i] = &sa_ctx->sa[sa_idx[i]];
 790 }