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116 lines
3.5 KiB
Groff
116 lines
3.5 KiB
Groff
.\"-
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.\" Copyright (c) 2003 Sam Leffler, Errno Consulting
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"/
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.Dd September 12, 2004
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.Dt SAFE 4
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.Os
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.Sh NAME
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.Nm safe
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.Nd SafeNet crypto accelerator
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.Sh SYNOPSIS
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.Cd "device safe"
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.Pp
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.Nm sysctl Va hw.safe.debug
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.Nm sysctl Va hw.safe.dump
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.Nm sysctl Va hw.safe.rnginterval
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.Nm sysctl Va hw.safe.rngbufsize
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.Nm sysctl Va hw.safe.rngmaxalarm
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.Sh DESCRIPTION
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The
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.Nm
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driver supports cards containing SafeNet crypto accelerator chips.
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.Pp
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The
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.Nm
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driver registers itself to accelerate DES, Triple-DES, AES, MD5-HMAC,
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SHA1-HMAC, and NULL operations for
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.Xr ipsec 4
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and
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.Xr crypto 4 .
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.Pp
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On all models, the driver registers itself to provide random data to the
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.Xr random 4
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subsystem.
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Periodically the driver will poll the hardware RNG and retrieve
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data for use by the system.
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If the driver detects that the hardware RNG is resonating with any local
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signal, it will reset the oscillators that generate random data.
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Three
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.Xr sysctl 8
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settings control this procedure:
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.Va hw.safe.rnginterval
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specifies the time, in seconds, between polling operations,
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.Va hw.safe.rngbufsize
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specifies the number of 32-bit words to retrieve on each poll,
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and
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.Va hw.safe.rngmaxalarm
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specifies the threshold for resetting the oscillators.
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.Pp
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When the driver is compiled with
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.Dv SAFE_DEBUG
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defined, two
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.Xr sysctl 8
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variables are provided for debugging purposes:
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.Va hw.safe.debug
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can be set to a non-zero value to enable debugging messages to be sent
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to the console for each cryptographic operation,
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.Va hw.safe.dump
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is a write-only variable that can be used to force driver state to be sent
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to the console.
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Set this variable to
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.Dq Li ring
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to dump the current state of the descriptor ring,
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to
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.Dq Li dma
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to dump the hardware DMA registers,
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or
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to
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.Dq Li int
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to dump the hardware interrupt registers.
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.Sh HARDWARE
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The
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.Nm
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driver supports cards containing any of the following chips:
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.Bl -tag -width "SafeNet 1141" -offset indent
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.It SafeNet 1141
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The original chipset.
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Supports DES, Triple-DES, AES, MD5, and SHA-1
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symmetric crypto operations, RNG, public key operations, and full IPsec
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packet processing.
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.It SafeNet 1741
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A faster version of the 1141.
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.El
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.Sh SEE ALSO
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.Xr crypt 3 ,
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.Xr crypto 4 ,
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.Xr intro 4 ,
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.Xr ipsec 4 ,
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.Xr random 4 ,
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.Xr crypto 9
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.Sh BUGS
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Public key support is not implemented.
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