SAFE(4) 						   BSD Kernel Interfaces Manual 						   SAFE(4)

NAME

     safe -- SafeNet crypto accelerator

SYNOPSIS

     To compile this driver into the kernel, place the following lines in your kernel configuration file:

	   device crypto
	   device cryptodev
	   device safe

     Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

	   safe_load="YES"

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

DESCRIPTION

     The safe driver supports cards containing SafeNet crypto accelerator chips.

     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 sec-
     onds, 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) 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 vari-
     able 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.

HARDWARE

     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 opera-
			 tions, and full IPsec packet processing.

	   SafeNet 1741  A faster version of the 1141.

SEE ALSO

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

BUGS

     Public key support is not implemented.

BSD
								   April 1, 2006							       BSD