SAFE(4) BSD Kernel Interfaces Manual SAFE(4)
safe -- SafeNet crypto accelerator
The safe driver supports cards containing SafeNet crypto accelerator
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 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(8) 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 resetting the oscillators.
When the driver is compiled with SAFE_DEBUG defined, two sysctl(8) vari-
ables 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.
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, pub-
lic key operations, and full IPsec packet processing.
SafeNet 1741 A faster version of the 1141.
crypt(3), crypto(4), intro(4), ipsec(4), random(4), crypto(9)
Public key support is not implemented.
BSD September 12, 2004 BSD