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AESNI(4)	       FreeBSD Kernel Interfaces Manual		      AESNI(4)

NAME
     aesni -- driver for the AES accelerator on	Intel CPUs

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

	   device crypto
	   device aesni

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

	   aesni_load="YES"

DESCRIPTION
     Starting with some	models of Core i5/i7, Intel processors implement a new
     set of instructions called	AESNI.	The set	of six instructions acceler-
     ates the calculation of the key schedule for key lengths of 128, 192, and
     256 of the	Advanced Encryption Standard (AES) symmetric cipher, and pro-
     vides a hardware implementation of	the regular and	the last encryption
     and decryption rounds.

     The processor capability is reported as AESNI in the Features2 line at
     boot.  The	aesni driver does not attach on	systems	that lack the required
     CPU capability.

     The aesni driver registers	itself to accelerate AES operations for
     crypto(4).	 Besides speed,	the advantage of using the aesni driver	is
     that the AESNI operation is data-independent, thus	eliminating some
     attack vectors based on measuring cache use and timings typically present
     in	table-driven implementations.

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

HISTORY
     The aesni driver first appeared in	FreeBSD	9.0.

AUTHORS
     The aesni driver was written by Konstantin	Belousov <kib@FreeBSD.org>.
     The key schedule calculation code was adopted from	the sample provided by
     Intel and used in the analogous OpenBSD driver.

FreeBSD	9.3		       September 6, 2010		   FreeBSD 9.3

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY | AUTHORS

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