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SAFE(4)                FreeBSD Kernel Interfaces Manual                SAFE(4)

NAME
     safe - SafeNet crypto accelerator

SYNOPSIS
     device safe

            sysctl hw.safe.debug
            sysctl hw.safe.rnginterval
            sysctl hw.safe.rngbufsize
            sysctl hw.safe.rngmaxalarm

DESCRIPTION
     The safe driver supports cards containing any of the following chips:

           SafeNet 1141  The original chipset.  Supports DES, Triple-DES, AES,
                         MD5, and SHA-1 symmetric crypto operations, RNG,
                         public key operations, and full IPsec packet
                         processing.

           SafeNet 1741  A faster version of the 1141.

     The safe driver registers itself to accelerate DES, Triple-DES, AES,
     MD5-HMAC, SHA1-HMAC, and NULL operations for ipsec(4) and crypto(4).

     On all models, the driver registers itself to provide random data to the
     random(4) subsystem.  Periodically the driver will poll the hardware RNG
     and retrieve data to for use by the system.  If the driver detects that
     the hardware RNG is resonating with any local signal it will reset the
     oscillators that generate random data.  Three sysctl settings control
     this procedure: hw.safe.rnginterval specifies the time, in seconds,
     between polling operations, hw.safe.rngbufsize specifies the number of
     32-bit words to retrieve on each poll, and hw.safe.rngmaxalarm specifies
     the threshold for reseting the oscillators.

     When the driver is compiled with SAFE_DEBUG defined, two sysctl variables
     are provided for debugging purposes: hw.safe.debug can be set to a non-
     zero value to enable debugging messages to be sent to the console for
     each cryptographic operation.  hw.safe.dump is a write-only variable that
     can be used to force driver state to be sent to the console.  Set this
     variable to ring to dump the current state of the descriptor ring, to dma
     to dump the hardware DMA registers, or to int to dump the hardware
     interrupt registers.

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

BUGS
     Public key support is not implemented.

FreeBSD 11.0-PRERELEASE          May 30, 2002          FreeBSD 11.0-PRERELEASE

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | BUGS

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