1 .. SPDX-License-Identifier: BSD-3-Clause
2 Copyright(c) 2016 Intel Corporation.
4 SNOW 3G Crypto Poll Mode Driver
5 ===============================
7 The SNOW 3G PMD (**librte_pmd_snow3g**) provides poll mode crypto driver
8 support for utilizing Intel Libsso library, which implements F8 and F9 functions
9 for SNOW 3G UEA2 cipher and UIA2 hash algorithms.
14 SNOW 3G PMD has support for:
18 * RTE_CRYPTO_CIPHER_SNOW3G_UEA2
20 Authentication algorithm:
22 * RTE_CRYPTO_AUTH_SNOW3G_UIA2
27 * Chained mbufs are not supported.
28 * SNOW 3G (UIA2) supported only if hash offset field is byte-aligned.
29 * In-place bit-level operations for SNOW 3G (UEA2) are not supported
30 (if length and/or offset of data to be ciphered is not byte-aligned).
35 To build DPDK with the SNOW3G_PMD the user is required to download
36 the export controlled ``libsso_snow3g`` library, by registering in
37 `Intel Resource & Design Center <https://www.intel.com/content/www/us/en/design/resource-design-center.html>`_.
38 Once approval has been granted, the user needs to search for
39 *Snow3G F8 F9 3GPP cryptographic algorithms Software Library* to download the
40 library or directly through this `link <https://cdrdv2.intel.com/v1/dl/getContent/575867>`_.
41 After downloading the library, the user needs to unpack and compile it
42 on their system before building DPDK::
46 **Note**: When encrypting with SNOW3G UEA2, by default the library
47 encrypts blocks of 4 bytes, regardless the number of bytes to
48 be encrypted provided (which leads to a possible buffer overflow).
49 To avoid this situation, it is necessary not to pass
50 3GPP_SAFE_BUFFERS as a compilation flag.
51 For this, in the Makefile of the library, make sure that this flag
54 #EXTRA_CFLAGS += -D_3GPP_SAFE_BUFFERS
60 In order to enable this virtual crypto PMD, user must:
62 * Export the environmental variable LIBSSO_SNOW3G_PATH with the path where
63 the library was extracted (snow3g folder).
65 * Build the LIBSSO_SNOW3G library (explained in Installation section).
67 * Set CONFIG_RTE_LIBRTE_PMD_SNOW3G=y in config/common_base.
69 To use the PMD in an application, user must:
71 * Call rte_vdev_init("crypto_snow3g") within the application.
73 * Use --vdev="crypto_snow3g" in the EAL options, which will call rte_vdev_init() internally.
75 The following parameters (all optional) can be provided in the previous two calls:
77 * socket_id: Specify the socket where the memory for the device is going to be allocated
78 (by default, socket_id will be the socket where the core that is creating the PMD is running on).
80 * max_nb_queue_pairs: Specify the maximum number of queue pairs in the device (8 by default).
82 * max_nb_sessions: Specify the maximum number of sessions that can be created (2048 by default).
86 .. code-block:: console
88 ./l2fwd-crypto -l 1 -n 4 --vdev="crypto_snow3g,socket_id=0,max_nb_sessions=128" \
89 -- -p 1 --cdev SW --chain CIPHER_ONLY --cipher_algo "snow3g-uea2"