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30 KASUMI Crypto Poll Mode Driver
31 ===============================
33 The KASUMI PMD (**librte_pmd_kasumi**) provides poll mode crypto driver
34 support for utilizing Intel Libsso library, which implements F8 and F9 functions
35 for KASUMI UEA1 cipher and UIA1 hash algorithms.
40 KASUMI PMD has support for:
44 * RTE_CRYPTO_CIPHER_KASUMI_F8
46 Authentication algorithm:
48 * RTE_CRYPTO_AUTH_KASUMI_F9
53 * Chained mbufs are not supported.
54 * KASUMI(F9) supported only if hash offset and length field is byte-aligned.
55 * In-place bit-level operations for KASUMI(F8) are not supported
56 (if length and/or offset of data to be ciphered is not byte-aligned).
62 To build DPDK with the KASUMI_PMD the user is required to download
63 the export controlled ``libsso_kasumi`` library, by requesting it from
64 `<https://networkbuilders.intel.com/network-technologies/dpdk>`_.
65 Once approval has been granted, the user needs to log in
66 `<https://networkbuilders.intel.com/dpdklogin>`_
67 and click on "Kasumi Bit Stream crypto library" link, to download the library.
68 After downloading the library, the user needs to unpack and compile it
69 on their system before building DPDK::
73 **Note**: When encrypting with KASUMI F8, by default the library
74 encrypts full blocks of 8 bytes, regardless the number of bytes to
75 be encrypted provided (which leads to a possible buffer overflow).
76 To avoid this situation, it is necessary not to pass
77 3GPP_SAFE_BUFFERS as a compilation flag.
78 Also, this is required when using chained operations
79 (cipher-then-auth/auth-then-cipher).
80 For this, in the Makefile of the library, make sure that this flag
83 #EXTRA_CFLAGS += -D_3GPP_SAFE_BUFFERS
85 **Note**: To build the PMD as a shared library, the libsso_kasumi
86 library must be built as follows::
88 make KASUMI_CFLAGS=-DKASUMI_C
94 In order to enable this virtual crypto PMD, user must:
96 * Export the environmental variable LIBSSO_KASUMI_PATH with the path where
97 the library was extracted (kasumi folder).
99 * Build the LIBSSO library (explained in Installation section).
101 * Set CONFIG_RTE_LIBRTE_PMD_KASUMI=y in config/common_base.
103 To use the PMD in an application, user must:
105 * Call rte_vdev_init("crypto_kasumi") within the application.
107 * Use --vdev="crypto_kasumi" in the EAL options, which will call rte_vdev_init() internally.
109 The following parameters (all optional) can be provided in the previous two calls:
111 * socket_id: Specify the socket where the memory for the device is going to be allocated
112 (by default, socket_id will be the socket where the core that is creating the PMD is running on).
114 * max_nb_queue_pairs: Specify the maximum number of queue pairs in the device (8 by default).
116 * max_nb_sessions: Specify the maximum number of sessions that can be created (2048 by default).
120 .. code-block:: console
122 ./l2fwd-crypto -l 1 -n 4 --vdev="crypto_kasumi,socket_id=0,max_nb_sessions=128" \
123 -- -p 1 --cdev SW --chain CIPHER_ONLY --cipher_algo "kasumi-f8"
125 Extra notes on KASUMI F9
126 ------------------------
128 When using KASUMI F9 authentication algorithm, the input buffer must be
129 constructed according to the 3GPP KASUMI specifications (section 4.4, page 13):
130 `<http://cryptome.org/3gpp/35201-900.pdf>`_.
131 Input buffer has to have COUNT (4 bytes), FRESH (4 bytes), MESSAGE and DIRECTION (1 bit)
132 concatenated. After the DIRECTION bit, a single '1' bit is appended, followed by
133 between 0 and 7 '0' bits, so that the total length of the buffer is multiple of 8 bits.
134 Note that the actual message can be any length, specified in bits.
136 Once this buffer is passed this way, when creating the crypto operation,
137 length of data to authenticate (op.sym.auth.data.length) must be the length
138 of all the items described above, including the padding at the end.
139 Also, offset of data to authenticate (op.sym.auth.data.offset)
140 must be such that points at the start of the COUNT bytes.