docs/180551: [patch] document NULL encryption algorithm in geli(8)

[r4721 at tormail.org]

>Number:         180551
>Category:       docs
>Synopsis:       [patch] document NULL encryption algorithm in geli(8)
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-doc
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Sun Jul 14 09:20:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     r4721 at tormail.org
>Release:        
>Organization:
>Environment:
>Description:
i had wished for years for a no-op encryption algorithm in geli so i could just use data integrity verification, only to find it existed all along. document this so that others can find it as well.
>How-To-Repeat:

>Fix:


Patch attached with submission follows:

Index: sbin/geom/class/eli/geli.8
===================================================================
--- sbin/geom/class/eli/geli.8	(revision 253282)
+++ sbin/geom/class/eli/geli.8	(working copy)
@@ -277,11 +277,14 @@
 .Nm AES-XTS ,
 .Nm AES-CBC ,
 .Nm Blowfish-CBC ,
-.Nm Camellia-CBC
+.Nm Camellia-CBC ,
+.Nm 3DES-CBC ,
 and
-.Nm 3DES-CBC .
+.Nm NULL .
 The default and recommended algorithm is
 .Nm AES-XTS .
+.Nm NULL
+is unencrypted.
 .It Fl i Ar iterations
 Number of iterations to use with PKCS#5v2.
 If this option is not specified,


>Release-Note:
>Audit-Trail:
>Unformatted: