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HIFN(4)			 BSD Kernel Interfaces Manual		       HIFN(4)

     hifn -- Hifn 7751/7951/7811/7955/7956 crypto accelerator

     device hifn

     The hifn driver supports various cards containing the Hifn	7751, 7951,
     7811, 7955, and 7956 chipsets.

     The hifn driver registers itself to accelerate DES, Triple-DES, AES (7955
     and 7956 only), ARC4, MD5,	MD5-HMAC, SHA1,	and SHA1-HMAC operations for
     ipsec(4) and crypto(4).

     The Hifn 7951, 7811, 7955,	and 7956 will also supply data to the kernel
     random(4) subsystem.

     The hifn driver supports various cards containing the Hifn	7751, 7951,
     7811, 7955, and 7956 chipsets, such as:

	   Invertex AEON   No longer being made.  Came as 128KB	SRAM model, or
			   2MB DRAM model.

	   Hifn	7751	   Reference board with	512KB SRAM.

	   PowerCrypt	   See  Comes with 512KB

	   XL-Crypt	   See  Only board based
			   on 7811 (which is faster than 7751 and has a	random
			   number generator).

	   NetSec 7751	   See	Supports the most
			   IPsec sessions, with	1MB SRAM.

	   Soekris Engineering vpn1201 and vpn1211
			   See	 Contains a 7951 and
			   supports symmetric and random number	operations.

	   Soekris Engineering vpn1401 and vpn1411
			   See	 Contains a 7955 and
			   supports symmetric and random number	operations.

     The 7751 chip starts out at initialization	by only	supporting compres-
     sion.  A proprietary algorithm, which has been reverse engineered,	is re-
     quired to unlock the cryptographic	functionality of the chip.  It is pos-
     sible for vendors to make boards which have a lock	ID not known to	the
     driver, but all vendors currently just use	the obvious ID which is	13
     bytes of 0.

     crypt(3), crypto(4), intro(4), ipsec(4), random(4), crypto(9)

     The Hifn 9751 shares the same PCI ID.  This chip is basically a 7751, but
     with the cryptographic functions missing.	Instead, the 9751 is only ca-
     pable of doing compression.  Since	we do not currently attempt to use any
     of	these chips to do compression, the 9751-based cards are	not useful.

     Support for the 7955 and 7956 is incomplete; the asymmetric crypto	facil-
     ities are to be added and the performance is suboptimal.

     The hifn device driver appeared in	OpenBSD	2.7.  The hifn device driver
     was imported to FreeBSD 5.0.

BSD			      September	12, 2004			   BSD


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