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author | Konstantin Belousov <kib@FreeBSD.org> | 2010-09-06 20:35:48 +0000 |
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committer | Konstantin Belousov <kib@FreeBSD.org> | 2010-09-06 20:35:48 +0000 |
commit | edb78df075462b3d7cf939111631029541607406 (patch) | |
tree | 5dd67fe638aaef1ecf629ead643e079986db5b34 /share/man/man4/aesni.4 | |
parent | 98ea71a310f49e4d21b3548892fd0c5889189128 (diff) | |
download | src-edb78df075462b3d7cf939111631029541607406.tar.gz src-edb78df075462b3d7cf939111631029541607406.zip |
Add aesni(4) manpage.
Notes
Notes:
svn path=/head/; revision=212262
Diffstat (limited to 'share/man/man4/aesni.4')
-rw-r--r-- | share/man/man4/aesni.4 | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/share/man/man4/aesni.4 b/share/man/man4/aesni.4 new file mode 100644 index 000000000000..2396e4893360 --- /dev/null +++ b/share/man/man4/aesni.4 @@ -0,0 +1,91 @@ +.\" Copyright (c) 2010 Konstantin Belousov <kib@FreeBSD.org> +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" $FreeBSD$ +.\" +.Dd September 6, 2010 +.Dt AESNI 4 +.Os +.Sh NAME +.Nm aesni +.Nd "driver for the AES accelerator on Intel CPUs" +.Sh SYNOPSIS +To compile this driver into the kernel, +place the following lines in your +kernel configuration file: +.Bd -ragged -offset indent +.Cd "device crypto" +.Cd "device aesni" +.Ed +.Pp +Alternatively, to load the driver as a +module at boot time, place the following line in +.Xr loader.conf 5 : +.Bd -literal -offset indent +aesni_load="YES" +.Ed +.Sh DESCRIPTION +Starting with some models of Core i5/i7, Intel processors implement +new set of instructions called AESNI. +The set of six instructions accelerates the calculation of the key +schedule for key lengths of 128, 192, and 256 of the Advanced +Encryption Standard (AES) symmetric cipher, and provides the hardware +implementation of the regular and the last encryption and decryption +rounds. +.Pp +The processor capability is reported as AESNI in the Features2 line +at the boot. Driver does not attach on the system that lacks the +required CPU capability. +.Pp +The +.Nm +driver registers itself to accelerate AES operations for +.Xr crypto 4 . +Besides speed, advantage of using the driver is that the AESNI operation +is data-independend, thus eliminating some attack vectors based on the +measuring cache use and timings, typically present in the table-driven +implementations. +.Sh SEE ALSO +.Xr crypt 3 , +.Xr crypto 4 , +.Xr intro 4 , +.Xr ipsec 4 , +.Xr padlock 4 , +.Xr random 4 , +.Xr crypto 9 +.Sh HISTORY +The +.Nm +driver first appeared in +.Fx 9.0 . +.Sh AUTHORS +.An -nosplit +The +.Nm +driver was written by +.An Konstantin Belousov Aq kib@FreeBSD.org . +The key schedule calculation code was adopted from the sample provided +by Intel and used in the analogous +.Ox +driver. |