HIFN(4)                   OpenBSD Programmer's Manual                  HIFN(4)

NAME
     hifn - Hifn 7751/7951 crypto accelerator

SYNOPSIS
     hifn* at pci? dev ? function ?

DESCRIPTION
     The hifn driver supports various cards containing the Hifn 7751 or Hifn
     7951 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 http://www.powercrypt.com/. Comes with 512KB
                           SRAM.

           NetSec 7751     See http://www.netsec.net/. Supports the most IPsec
                           sessions, with 1MB SRAM.

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

     The hifn driver registers itself to accelerate DES, Triple-DES,
     MD5-HMAC96, and SHA1-HMAC96 operations in ipsec(4).

     The Hifn 7951 will also supply data to the kernel random(4) subsystem.

BUGS
     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.

SEE ALSO
     crypt(3), ipsec(4), random(4), crypto(9)

CAVEATS
     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.

HISTORY
     The hifn device driver appeared in OpenBSD 2.7.

OpenBSD 3.0                     March 16, 2000                               1
