14. ZUC Crypto Poll Mode Driver

The ZUC PMD (librte_pmd_zuc) provides poll mode crypto driver support for utilizing Intel Libsso library, which implements F8 and F9 functions for ZUC EEA3 cipher and EIA3 hash algorithms.

14.1. Features

ZUC PMD has support for:

Cipher algorithm:

  • RTE_CRYPTO_CIPHER_ZUC_EEA3

Authentication algorithm:

  • RTE_CRYPTO_AUTH_ZUC_EIA3

14.2. Limitations

  • Chained mbufs are not supported.
  • ZUC (EIA3) supported only if hash offset field is byte-aligned.
  • ZUC (EEA3) supported only if cipher length, cipher offset fields are byte-aligned.
  • ZUC PMD cannot be built as a shared library, due to limitations in the underlying library.

14.3. Installation

To build DPDK with the ZUC_PMD the user is required to download the export controlled libsso_zuc library, by requesting it from https://networkbuilders.intel.com/network-technologies/dpdk. Once approval has been granted, the user needs to log in https://networkbuilders.intel.com/dpdklogin and click on “ZUC Library” link, to download the library. After downloading the library, the user needs to unpack and compile it on their system before building DPDK:

make

14.4. Initialization

In order to enable this virtual crypto PMD, user must:

  • Export the environmental variable LIBSSO_ZUC_PATH with the path where the library was extracted (zuc folder).
  • Export the environmental variable LD_LIBRARY_PATH with the path where the built libsso library is (LIBSSO_ZUC_PATH/build).
  • Build the LIBSSO_ZUC library (explained in Installation section).
  • Build DPDK as follows:
make config T=x86_64-native-linuxapp-gcc
sed -i 's,\(CONFIG_RTE_LIBRTE_PMD_ZUC\)=n,\1=y,' build/.config
make

To use the PMD in an application, user must:

  • Call rte_vdev_init(“crypto_zuc”) within the application.
  • Use –vdev=”crypto_zuc” in the EAL options, which will call rte_vdev_init() internally.

The following parameters (all optional) can be provided in the previous two calls:

  • socket_id: Specify the socket where the memory for the device is going to be allocated (by default, socket_id will be the socket where the core that is creating the PMD is running on).
  • max_nb_queue_pairs: Specify the maximum number of queue pairs in the device (8 by default).
  • max_nb_sessions: Specify the maximum number of sessions that can be created (2048 by default).

Example:

./l2fwd-crypto -l 1 -n 4 --vdev="crypto_zuc,socket_id=0,max_nb_sessions=128" \
-- -p 1 --cdev SW --chain CIPHER_ONLY --cipher_algo "zuc-eea3"