There's a unit test application test_cryptodev_asym.c inside unit test framework that
show how to setup and process asymmetric operations using cryptodev library.
-The following sample code shows the basic steps to compute modular exponentiation
-using 1024-bit modulus length using openssl PMD available in DPDK (performing other
-crypto operations is similar except change to respective op and xform setup).
+The following code samples are taken from the test application mentioned above,
+and show basic steps to compute modular exponentiation using an openssl PMD
+available in DPDK (performing other crypto operations is similar except change
+to respective op and xform setup).
-.. code-block:: c
+.. note::
+ The following code snippets are taken from multiple functions, so variable
+ names may differ slightly between sections.
- /*
- * Simple example to compute modular exponentiation with 1024-bit key
- *
- */
- #define MAX_ASYM_SESSIONS 10
- #define NUM_ASYM_BUFS 10
-
- struct rte_mempool *crypto_op_pool, *asym_session_pool;
- unsigned int asym_session_size;
- int ret;
+Configure the virtual device, queue pairs, crypto op pool and session mempool.
- /* Initialize EAL. */
- ret = rte_eal_init(argc, argv);
- if (ret < 0)
- rte_exit(EXIT_FAILURE, "Invalid EAL arguments\n");
+.. literalinclude:: ../../../app/test/test_cryptodev_asym.c
+ :language: c
+ :start-after: Device, op pool and session configuration for asymmetric crypto. 8<
+ :end-before: >8 End of device, op pool and session configuration for asymmetric crypto section.
+ :dedent: 1
- uint8_t socket_id = rte_socket_id();
-
- /* Create crypto operation pool. */
- crypto_op_pool = rte_crypto_op_pool_create(
- "crypto_op_pool",
- RTE_CRYPTO_OP_TYPE_ASYMMETRIC,
- NUM_ASYM_BUFS, 0, 0,
- socket_id);
- if (crypto_op_pool == NULL)
- rte_exit(EXIT_FAILURE, "Cannot create crypto op pool\n");
-
- /* Create the virtual crypto device. */
- char args[128];
- const char *crypto_name = "crypto_openssl";
- snprintf(args, sizeof(args), "socket_id=%d", socket_id);
- ret = rte_vdev_init(crypto_name, args);
- if (ret != 0)
- rte_exit(EXIT_FAILURE, "Cannot create virtual device");
+Create MODEX data vectors.
- uint8_t cdev_id = rte_cryptodev_get_dev_id(crypto_name);
+.. literalinclude:: ../../../app/test/test_cryptodev_mod_test_vectors.h
+ :language: c
+ :start-after: MODEX data. 8<
+ :end-before: >8 End of MODEX data.
- /* Get private asym session data size. */
- asym_session_size = rte_cryptodev_get_asym_private_session_size(cdev_id);
+Setup crypto xform to do modular exponentiation using data vectors.
- /*
- * Create session mempool, with two objects per session,
- * one for the session header and another one for the
- * private asym session data for the crypto device.
- */
- asym_session_pool = rte_mempool_create("asym_session_pool",
- MAX_ASYM_SESSIONS * 2,
- asym_session_size,
- 0,
- 0, NULL, NULL, NULL,
- NULL, socket_id,
- 0);
+.. literalinclude:: ../../../app/test/test_cryptodev_mod_test_vectors.h
+ :language: c
+ :start-after: MODEX vector. 8<
+ :end-before: >8 End of MODEX vector.
- /* Configure the crypto device. */
- struct rte_cryptodev_config conf = {
- .nb_queue_pairs = 1,
- .socket_id = socket_id
- };
- struct rte_cryptodev_qp_conf qp_conf = {
- .nb_descriptors = 2048
- };
+Generate crypto op, create and attach a session, then process packets.
- if (rte_cryptodev_configure(cdev_id, &conf) < 0)
- rte_exit(EXIT_FAILURE, "Failed to configure cryptodev %u", cdev_id);
-
- if (rte_cryptodev_queue_pair_setup(cdev_id, 0, &qp_conf,
- socket_id, asym_session_pool) < 0)
- rte_exit(EXIT_FAILURE, "Failed to setup queue pair\n");
-
- if (rte_cryptodev_start(cdev_id) < 0)
- rte_exit(EXIT_FAILURE, "Failed to start device\n");
-
- /* Setup crypto xform to do modular exponentiation with 1024 bit
- * length modulus
- */
- struct rte_crypto_asym_xform modex_xform = {
- .next = NULL,
- .xform_type = RTE_CRYPTO_ASYM_XFORM_MODEX,
- .modex = {
- .modulus = {
- .data =
- (uint8_t *)
- ("\xb3\xa1\xaf\xb7\x13\x08\x00\x0a\x35\xdc\x2b\x20\x8d"
- "\xa1\xb5\xce\x47\x8a\xc3\x80\xf4\x7d\x4a\xa2\x62\xfd\x61\x7f"
- "\xb5\xa8\xde\x0a\x17\x97\xa0\xbf\xdf\x56\x5a\x3d\x51\x56\x4f"
- "\x70\x70\x3f\x63\x6a\x44\x5b\xad\x84\x0d\x3f\x27\x6e\x3b\x34"
- "\x91\x60\x14\xb9\xaa\x72\xfd\xa3\x64\xd2\x03\xa7\x53\x87\x9e"
- "\x88\x0b\xc1\x14\x93\x1a\x62\xff\xb1\x5d\x74\xcd\x59\x63\x18"
- "\x11\x3d\x4f\xba\x75\xd4\x33\x4e\x23\x6b\x7b\x57\x44\xe1\xd3"
- "\x03\x13\xa6\xf0\x8b\x60\xb0\x9e\xee\x75\x08\x9d\x71\x63\x13"
- "\xcb\xa6\x81\x92\x14\x03\x22\x2d\xde\x55"),
- .length = 128
- },
- .exponent = {
- .data = (uint8_t *)("\x01\x00\x01"),
- .length = 3
- }
- }
- };
- /* Create asym crypto session and initialize it for the crypto device. */
- struct rte_cryptodev_asym_session *asym_session;
- asym_session = rte_cryptodev_asym_session_create(asym_session_pool);
- if (asym_session == NULL)
- rte_exit(EXIT_FAILURE, "Session could not be created\n");
-
- if (rte_cryptodev_asym_session_init(cdev_id, asym_session,
- &modex_xform, asym_session_pool) < 0)
- rte_exit(EXIT_FAILURE, "Session could not be initialized "
- "for the crypto device\n");
-
- /* Get a burst of crypto operations. */
- struct rte_crypto_op *crypto_ops[1];
- if (rte_crypto_op_bulk_alloc(crypto_op_pool,
- RTE_CRYPTO_OP_TYPE_ASYMMETRIC,
- crypto_ops, 1) == 0)
- rte_exit(EXIT_FAILURE, "Not enough crypto operations available\n");
-
- /* Set up the crypto operations. */
- struct rte_crypto_asym_op *asym_op = crypto_ops[0]->asym;
-
- /* calculate mod exp of value 0xf8 */
- static unsigned char base[] = {0xF8};
- asym_op->modex.base.data = base;
- asym_op->modex.base.length = sizeof(base);
- asym_op->modex.base.iova = base;
-
- /* Attach the asym crypto session to the operation */
- rte_crypto_op_attach_asym_session(op, asym_session);
-
- /* Enqueue the crypto operations in the crypto device. */
- uint16_t num_enqueued_ops = rte_cryptodev_enqueue_burst(cdev_id, 0,
- crypto_ops, 1);
-
- /*
- * Dequeue the crypto operations until all the operations
- * are processed in the crypto device.
- */
- uint16_t num_dequeued_ops, total_num_dequeued_ops = 0;
- do {
- struct rte_crypto_op *dequeued_ops[1];
- num_dequeued_ops = rte_cryptodev_dequeue_burst(cdev_id, 0,
- dequeued_ops, 1);
- total_num_dequeued_ops += num_dequeued_ops;
-
- /* Check if operation was processed successfully */
- if (dequeued_ops[0]->status != RTE_CRYPTO_OP_STATUS_SUCCESS)
- rte_exit(EXIT_FAILURE,
- "Some operations were not processed correctly");
-
- } while (total_num_dequeued_ops < num_enqueued_ops);
+.. literalinclude:: ../../../app/test/test_cryptodev_asym.c
+ :language: c
+ :start-after: Create op, create session, and process packets. 8<
+ :end-before: >8 End of create op, create session, and process packets section.
+ :dedent: 1
Asymmetric Crypto Device API
git.droids-corp.org / dpdk.git / blobdiff