drivers/crypto/aesni_gcm/aesni_gcm_pmd.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2016-2017 Intel Corporation. All rights reserved.
   5  *
   6  *   Redistribution and use in source and binary forms, with or without
   7  *   modification, are permitted provided that the following conditions
   8  *   are met:
   9  *
  10  *     * Redistributions of source code must retain the above copyright
  11  *       notice, this list of conditions and the following disclaimer.
  12  *     * Redistributions in binary form must reproduce the above copyright
  13  *       notice, this list of conditions and the following disclaimer in
  14  *       the documentation and/or other materials provided with the
  15  *       distribution.
  16  *     * Neither the name of Intel Corporation nor the names of its
  17  *       contributors may be used to endorse or promote products derived
  18  *       from this software without specific prior written permission.
  19  *
  20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <rte_common.h>
  34 #include <rte_config.h>
  35 #include <rte_hexdump.h>
  36 #include <rte_cryptodev.h>
  37 #include <rte_cryptodev_pmd.h>
  38 #include <rte_cryptodev_vdev.h>
  39 #include <rte_vdev.h>
  40 #include <rte_malloc.h>
  41 #include <rte_cpuflags.h>
  42 #include <rte_byteorder.h>
  43
  44 #include "aesni_gcm_pmd_private.h"
  45
  46 /** GCM encode functions pointer table */
  47 static const struct aesni_gcm_ops aesni_gcm_enc[] = {
  48                 [AESNI_GCM_KEY_128] = {
  49                                 aesni_gcm128_init,
  50                                 aesni_gcm128_enc_update,
  51                                 aesni_gcm128_enc_finalize
  52                 },
  53                 [AESNI_GCM_KEY_256] = {
  54                                 aesni_gcm256_init,
  55                                 aesni_gcm256_enc_update,
  56                                 aesni_gcm256_enc_finalize
  57                 }
  58 };
  59
  60 /** GCM decode functions pointer table */
  61 static const struct aesni_gcm_ops aesni_gcm_dec[] = {
  62                 [AESNI_GCM_KEY_128] = {
  63                                 aesni_gcm128_init,
  64                                 aesni_gcm128_dec_update,
  65                                 aesni_gcm128_dec_finalize
  66                 },
  67                 [AESNI_GCM_KEY_256] = {
  68                                 aesni_gcm256_init,
  69                                 aesni_gcm256_dec_update,
  70                                 aesni_gcm256_dec_finalize
  71                 }
  72 };
  73
  74 /** Parse crypto xform chain and set private session parameters */
  75 int
  76 aesni_gcm_set_session_parameters(struct aesni_gcm_session *sess,
  77                 const struct rte_crypto_sym_xform *xform)
  78 {
  79         const struct rte_crypto_sym_xform *auth_xform;
  80         const struct rte_crypto_sym_xform *cipher_xform;
  81
  82         if (xform->next == NULL || xform->next->next != NULL) {
  83                 GCM_LOG_ERR("Two and only two chained xform required");
  84                 return -EINVAL;
  85         }
  86
  87         if (xform->type == RTE_CRYPTO_SYM_XFORM_CIPHER &&
  88                         xform->next->type == RTE_CRYPTO_SYM_XFORM_AUTH) {
  89                 auth_xform = xform->next;
  90                 cipher_xform = xform;
  91         } else if (xform->type == RTE_CRYPTO_SYM_XFORM_AUTH &&
  92                         xform->next->type == RTE_CRYPTO_SYM_XFORM_CIPHER) {
  93                 auth_xform = xform;
  94                 cipher_xform = xform->next;
  95         } else {
  96                 GCM_LOG_ERR("Cipher and auth xform required");
  97                 return -EINVAL;
  98         }
  99
 100         if (!(cipher_xform->cipher.algo == RTE_CRYPTO_CIPHER_AES_GCM &&
 101                 (auth_xform->auth.algo == RTE_CRYPTO_AUTH_AES_GCM ||
 102                         auth_xform->auth.algo == RTE_CRYPTO_AUTH_AES_GMAC))) {
 103                 GCM_LOG_ERR("We only support AES GCM and AES GMAC");
 104                 return -EINVAL;
 105         }
 106
 107         /* Select Crypto operation */
 108         if (cipher_xform->cipher.op == RTE_CRYPTO_CIPHER_OP_ENCRYPT &&
 109                         auth_xform->auth.op == RTE_CRYPTO_AUTH_OP_GENERATE)
 110                 sess->op = AESNI_GCM_OP_AUTHENTICATED_ENCRYPTION;
 111         else if (cipher_xform->cipher.op == RTE_CRYPTO_CIPHER_OP_DECRYPT &&
 112                         auth_xform->auth.op == RTE_CRYPTO_AUTH_OP_VERIFY)
 113                 sess->op = AESNI_GCM_OP_AUTHENTICATED_DECRYPTION;
 114         else {
 115                 GCM_LOG_ERR("Cipher/Auth operations: Encrypt/Generate or"
 116                                 " Decrypt/Verify are valid only");
 117                 return -EINVAL;
 118         }
 119
 120         /* Check key length and calculate GCM pre-compute. */
 121         switch (cipher_xform->cipher.key.length) {
 122         case 16:
 123                 aesni_gcm128_pre(cipher_xform->cipher.key.data, &sess->gdata);
 124                 sess->key = AESNI_GCM_KEY_128;
 125
 126                 break;
 127         case 32:
 128                 aesni_gcm256_pre(cipher_xform->cipher.key.data, &sess->gdata);
 129                 sess->key = AESNI_GCM_KEY_256;
 130
 131                 break;
 132         default:
 133                 GCM_LOG_ERR("Unsupported cipher key length");
 134                 return -EINVAL;
 135         }
 136
 137         return 0;
 138 }
 139
 140 /** Get gcm session */
 141 static struct aesni_gcm_session *
 142 aesni_gcm_get_session(struct aesni_gcm_qp *qp, struct rte_crypto_op *op)
 143 {
 144         struct aesni_gcm_session *sess = NULL;
 145         struct rte_crypto_sym_op *sym_op = op->sym;
 146
 147         if (op->sess_type == RTE_CRYPTO_OP_WITH_SESSION) {
 148                 if (unlikely(sym_op->session->dev_type
 149                                         != RTE_CRYPTODEV_AESNI_GCM_PMD))
 150                         return sess;
 151
 152                 sess = (struct aesni_gcm_session *)sym_op->session->_private;
 153         } else  {
 154                 void *_sess;
 155
 156                 if (rte_mempool_get(qp->sess_mp, &_sess))
 157                         return sess;
 158
 159                 sess = (struct aesni_gcm_session *)
 160                         ((struct rte_cryptodev_sym_session *)_sess)->_private;
 161
 162                 if (unlikely(aesni_gcm_set_session_parameters(sess,
 163                                 sym_op->xform) != 0)) {
 164                         rte_mempool_put(qp->sess_mp, _sess);
 165                         sess = NULL;
 166                 }
 167         }
 168         return sess;
 169 }
 170
 171 /**
 172  * Process a crypto operation and complete a JOB_AES_HMAC job structure for
 173  * submission to the multi buffer library for processing.
 174  *
 175  * @param       qp              queue pair
 176  * @param       op              symmetric crypto operation
 177  * @param       session         GCM session
 178  *
 179  * @return
 180  *
 181  */
 182 static int
 183 process_gcm_crypto_op(struct rte_crypto_sym_op *op,
 184                 struct aesni_gcm_session *session)
 185 {
 186         uint8_t *src, *dst;
 187         struct rte_mbuf *m_src = op->m_src;
 188         uint32_t offset = op->cipher.data.offset;
 189         uint32_t part_len, total_len, data_len;
 190
 191         RTE_ASSERT(m_src != NULL);
 192
 193         while (offset >= m_src->data_len) {
 194                 offset -= m_src->data_len;
 195                 m_src = m_src->next;
 196
 197                 RTE_ASSERT(m_src != NULL);
 198         }
 199
 200         data_len = m_src->data_len - offset;
 201         part_len = (data_len < op->cipher.data.length) ? data_len :
 202                         op->cipher.data.length;
 203
 204         /* Destination buffer is required when segmented source buffer */
 205         RTE_ASSERT((part_len == op->cipher.data.length) ||
 206                         ((part_len != op->cipher.data.length) &&
 207                                         (op->m_dst != NULL)));
 208         /* Segmented destination buffer is not supported */
 209         RTE_ASSERT((op->m_dst == NULL) ||
 210                         ((op->m_dst != NULL) &&
 211                                         rte_pktmbuf_is_contiguous(op->m_dst)));
 212
 213
 214         dst = op->m_dst ?
 215                         rte_pktmbuf_mtod_offset(op->m_dst, uint8_t *,
 216                                         op->cipher.data.offset) :
 217                         rte_pktmbuf_mtod_offset(op->m_src, uint8_t *,
 218                                         op->cipher.data.offset);
 219
 220         src = rte_pktmbuf_mtod_offset(m_src, uint8_t *, offset);
 221
 222         /* sanity checks */
 223         if (op->cipher.iv.length != 16 && op->cipher.iv.length != 12 &&
 224                         op->cipher.iv.length != 0) {
 225                 GCM_LOG_ERR("iv");
 226                 return -1;
 227         }
 228
 229         /*
 230          * GCM working in 12B IV mode => 16B pre-counter block we need
 231          * to set BE LSB to 1, driver expects that 16B is allocated
 232          */
 233         if (op->cipher.iv.length == 12) {
 234                 uint32_t *iv_padd = (uint32_t *)&op->cipher.iv.data[12];
 235                 *iv_padd = rte_bswap32(1);
 236         }
 237
 238         if (op->auth.digest.length != 16 &&
 239                         op->auth.digest.length != 12 &&
 240                         op->auth.digest.length != 8) {
 241                 GCM_LOG_ERR("digest");
 242                 return -1;
 243         }
 244
 245         if (session->op == AESNI_GCM_OP_AUTHENTICATED_ENCRYPTION) {
 246
 247                 aesni_gcm_enc[session->key].init(&session->gdata,
 248                                 op->cipher.iv.data,
 249                                 op->auth.aad.data,
 250                                 (uint64_t)op->auth.aad.length);
 251
 252                 aesni_gcm_enc[session->key].update(&session->gdata, dst, src,
 253                                 (uint64_t)part_len);
 254                 total_len = op->cipher.data.length - part_len;
 255
 256                 while (total_len) {
 257                         dst += part_len;
 258                         m_src = m_src->next;
 259
 260                         RTE_ASSERT(m_src != NULL);
 261
 262                         src = rte_pktmbuf_mtod(m_src, uint8_t *);
 263                         part_len = (m_src->data_len < total_len) ?
 264                                         m_src->data_len : total_len;
 265
 266                         aesni_gcm_enc[session->key].update(&session->gdata,
 267                                         dst, src,
 268                                         (uint64_t)part_len);
 269                         total_len -= part_len;
 270                 }
 271
 272                 aesni_gcm_enc[session->key].finalize(&session->gdata,
 273                                 op->auth.digest.data,
 274                                 (uint64_t)op->auth.digest.length);
 275         } else { /* session->op == AESNI_GCM_OP_AUTHENTICATED_DECRYPTION */
 276                 uint8_t *auth_tag = (uint8_t *)rte_pktmbuf_append(op->m_dst ?
 277                                 op->m_dst : op->m_src,
 278                                 op->auth.digest.length);
 279
 280                 if (!auth_tag) {
 281                         GCM_LOG_ERR("auth_tag");
 282                         return -1;
 283                 }
 284
 285                 aesni_gcm_dec[session->key].init(&session->gdata,
 286                                 op->cipher.iv.data,
 287                                 op->auth.aad.data,
 288                                 (uint64_t)op->auth.aad.length);
 289
 290                 aesni_gcm_dec[session->key].update(&session->gdata, dst, src,
 291                                 (uint64_t)part_len);
 292                 total_len = op->cipher.data.length - part_len;
 293
 294                 while (total_len) {
 295                         dst += part_len;
 296                         m_src = m_src->next;
 297
 298                         RTE_ASSERT(m_src != NULL);
 299
 300                         src = rte_pktmbuf_mtod(m_src, uint8_t *);
 301                         part_len = (m_src->data_len < total_len) ?
 302                                         m_src->data_len : total_len;
 303
 304                         aesni_gcm_dec[session->key].update(&session->gdata,
 305                                         dst, src,
 306                                         (uint64_t)part_len);
 307                         total_len -= part_len;
 308                 }
 309
 310                 aesni_gcm_dec[session->key].finalize(&session->gdata,
 311                                 auth_tag,
 312                                 (uint64_t)op->auth.digest.length);
 313         }
 314
 315         return 0;
 316 }
 317
 318 /**
 319  * Process a completed job and return rte_mbuf which job processed
 320  *
 321  * @param job   JOB_AES_HMAC job to process
 322  *
 323  * @return
 324  * - Returns processed mbuf which is trimmed of output digest used in
 325  * verification of supplied digest in the case of a HASH_CIPHER operation
 326  * - Returns NULL on invalid job
 327  */
 328 static void
 329 post_process_gcm_crypto_op(struct rte_crypto_op *op)
 330 {
 331         struct rte_mbuf *m = op->sym->m_dst ? op->sym->m_dst : op->sym->m_src;
 332
 333         struct aesni_gcm_session *session =
 334                 (struct aesni_gcm_session *)op->sym->session->_private;
 335
 336         op->status = RTE_CRYPTO_OP_STATUS_SUCCESS;
 337
 338         /* Verify digest if required */
 339         if (session->op == AESNI_GCM_OP_AUTHENTICATED_DECRYPTION) {
 340
 341                 uint8_t *tag = rte_pktmbuf_mtod_offset(m, uint8_t *,
 342                                 m->data_len - op->sym->auth.digest.length);
 343
 344 #ifdef RTE_LIBRTE_PMD_AESNI_GCM_DEBUG
 345                 rte_hexdump(stdout, "auth tag (orig):",
 346                                 op->sym->auth.digest.data, op->sym->auth.digest.length);
 347                 rte_hexdump(stdout, "auth tag (calc):",
 348                                 tag, op->sym->auth.digest.length);
 349 #endif
 350
 351                 if (memcmp(tag, op->sym->auth.digest.data,
 352                                 op->sym->auth.digest.length) != 0)
 353                         op->status = RTE_CRYPTO_OP_STATUS_AUTH_FAILED;
 354
 355                 /* trim area used for digest from mbuf */
 356                 rte_pktmbuf_trim(m, op->sym->auth.digest.length);
 357         }
 358 }
 359
 360 /**
 361  * Process a completed GCM request
 362  *
 363  * @param qp            Queue Pair to process
 364  * @param job           JOB_AES_HMAC job
 365  *
 366  * @return
 367  * - Number of processed jobs
 368  */
 369 static void
 370 handle_completed_gcm_crypto_op(struct aesni_gcm_qp *qp,
 371                 struct rte_crypto_op *op)
 372 {
 373         post_process_gcm_crypto_op(op);
 374
 375         /* Free session if a session-less crypto op */
 376         if (op->sess_type == RTE_CRYPTO_OP_SESSIONLESS) {
 377                 rte_mempool_put(qp->sess_mp, op->sym->session);
 378                 op->sym->session = NULL;
 379         }
 380 }
 381
 382 static uint16_t
 383 aesni_gcm_pmd_dequeue_burst(void *queue_pair,
 384                 struct rte_crypto_op **ops, uint16_t nb_ops)
 385 {
 386         struct aesni_gcm_session *sess;
 387         struct aesni_gcm_qp *qp = queue_pair;
 388
 389         int retval = 0;
 390         unsigned int i, nb_dequeued;
 391
 392         nb_dequeued = rte_ring_dequeue_burst(qp->processed_pkts,
 393                         (void **)ops, nb_ops, NULL);
 394
 395         for (i = 0; i < nb_dequeued; i++) {
 396
 397                 sess = aesni_gcm_get_session(qp, ops[i]);
 398                 if (unlikely(sess == NULL)) {
 399                         ops[i]->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
 400                         qp->qp_stats.dequeue_err_count++;
 401                         break;
 402                 }
 403
 404                 retval = process_gcm_crypto_op(ops[i]->sym, sess);
 405                 if (retval < 0) {
 406                         ops[i]->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
 407                         qp->qp_stats.dequeue_err_count++;
 408                         break;
 409                 }
 410
 411                 handle_completed_gcm_crypto_op(qp, ops[i]);
 412         }
 413
 414         qp->qp_stats.dequeued_count += i;
 415
 416         return i;
 417 }
 418
 419 static uint16_t
 420 aesni_gcm_pmd_enqueue_burst(void *queue_pair,
 421                 struct rte_crypto_op **ops, uint16_t nb_ops)
 422 {
 423         struct aesni_gcm_qp *qp = queue_pair;
 424
 425         unsigned int nb_enqueued;
 426
 427         nb_enqueued = rte_ring_enqueue_burst(qp->processed_pkts,
 428                         (void **)ops, nb_ops, NULL);
 429         qp->qp_stats.enqueued_count += nb_enqueued;
 430
 431         return nb_enqueued;
 432 }
 433
 434 static int aesni_gcm_remove(struct rte_vdev_device *vdev);
 435
 436 static int
 437 aesni_gcm_create(const char *name,
 438                 struct rte_vdev_device *vdev,
 439                 struct rte_crypto_vdev_init_params *init_params)
 440 {
 441         struct rte_cryptodev *dev;
 442         struct aesni_gcm_private *internals;
 443
 444         if (init_params->name[0] == '\0')
 445                 snprintf(init_params->name, sizeof(init_params->name),
 446                                 "%s", name);
 447
 448         /* Check CPU for support for AES instruction set */
 449         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_AES)) {
 450                 GCM_LOG_ERR("AES instructions not supported by CPU");
 451                 return -EFAULT;
 452         }
 453
 454         dev = rte_cryptodev_vdev_pmd_init(init_params->name,
 455                         sizeof(struct aesni_gcm_private), init_params->socket_id,
 456                         vdev);
 457         if (dev == NULL) {
 458                 GCM_LOG_ERR("failed to create cryptodev vdev");
 459                 goto init_error;
 460         }
 461
 462         dev->dev_type = RTE_CRYPTODEV_AESNI_GCM_PMD;
 463         dev->dev_ops = rte_aesni_gcm_pmd_ops;
 464
 465         /* register rx/tx burst functions for data path */
 466         dev->dequeue_burst = aesni_gcm_pmd_dequeue_burst;
 467         dev->enqueue_burst = aesni_gcm_pmd_enqueue_burst;
 468
 469         dev->feature_flags = RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO |
 470                         RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING |
 471                         RTE_CRYPTODEV_FF_CPU_AESNI |
 472                         RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER;
 473
 474         internals = dev->data->dev_private;
 475
 476         internals->max_nb_queue_pairs = init_params->max_nb_queue_pairs;
 477         internals->max_nb_sessions = init_params->max_nb_sessions;
 478
 479         return 0;
 480
 481 init_error:
 482         GCM_LOG_ERR("driver %s: create failed", init_params->name);
 483
 484         aesni_gcm_remove(vdev);
 485         return -EFAULT;
 486 }
 487
 488 static int
 489 aesni_gcm_probe(struct rte_vdev_device *vdev)
 490 {
 491         struct rte_crypto_vdev_init_params init_params = {
 492                 RTE_CRYPTODEV_VDEV_DEFAULT_MAX_NB_QUEUE_PAIRS,
 493                 RTE_CRYPTODEV_VDEV_DEFAULT_MAX_NB_SESSIONS,
 494                 rte_socket_id(),
 495                 {0}
 496         };
 497         const char *name;
 498         const char *input_args;
 499
 500         name = rte_vdev_device_name(vdev);
 501         if (name == NULL)
 502                 return -EINVAL;
 503         input_args = rte_vdev_device_args(vdev);
 504         rte_cryptodev_vdev_parse_init_params(&init_params, input_args);
 505
 506         RTE_LOG(INFO, PMD, "Initialising %s on NUMA node %d\n", name,
 507                         init_params.socket_id);
 508         if (init_params.name[0] != '\0')
 509                 RTE_LOG(INFO, PMD, "  User defined name = %s\n",
 510                         init_params.name);
 511         RTE_LOG(INFO, PMD, "  Max number of queue pairs = %d\n",
 512                         init_params.max_nb_queue_pairs);
 513         RTE_LOG(INFO, PMD, "  Max number of sessions = %d\n",
 514                         init_params.max_nb_sessions);
 515
 516         return aesni_gcm_create(name, vdev, &init_params);
 517 }
 518
 519 static int
 520 aesni_gcm_remove(struct rte_vdev_device *vdev)
 521 {
 522         const char *name;
 523
 524         name = rte_vdev_device_name(vdev);
 525         if (name == NULL)
 526                 return -EINVAL;
 527
 528         GCM_LOG_INFO("Closing AESNI crypto device %s on numa socket %u\n",
 529                         name, rte_socket_id());
 530
 531         return 0;
 532 }
 533
 534 static struct rte_vdev_driver aesni_gcm_pmd_drv = {
 535         .probe = aesni_gcm_probe,
 536         .remove = aesni_gcm_remove
 537 };
 538
 539 RTE_PMD_REGISTER_VDEV(CRYPTODEV_NAME_AESNI_GCM_PMD, aesni_gcm_pmd_drv);
 540 RTE_PMD_REGISTER_ALIAS(CRYPTODEV_NAME_AESNI_GCM_PMD, cryptodev_aesni_gcm_pmd);
 541 RTE_PMD_REGISTER_PARAM_STRING(CRYPTODEV_NAME_AESNI_GCM_PMD,
 542         "max_nb_queue_pairs=<int> "
 543         "max_nb_sessions=<int> "
 544         "socket_id=<int>");