From 880a599e262b9193219e612d827b35bb0c292dae Mon Sep 17 00:00:00 2001
From: Tom Gundersen <teg@jklm.no>
Date: Fri, 29 Jun 2012 14:36:37 +0200
Subject: cryptsetup: add keyfile-offset= support

This is useful if your keyfile is a block device, and you want to
use a specific part of it, such as an area between the MBR and the
first partition.

This feature is documented in the Arch wiki[0], and has been supported
by the Arch initscripts, so would be nice to get this into systemd.

This requires libcryptsetup >= 1.4.2 (released 12.4.2012).

Acked-by: Paul Menzel <paulepanter@users.sourceforge.net>

[0]:
<https://wiki.archlinux.org/index.php/System_Encryption_with_LUKS#
Storing_the_key_between_MBR_and_1st_partition>
---
 man/crypttab.xml | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'man/crypttab.xml')

diff --git a/man/crypttab.xml b/man/crypttab.xml
index f3bde71b4f..2fa8e8940f 100644
--- a/man/crypttab.xml
+++ b/man/crypttab.xml
@@ -130,6 +130,18 @@
                         </varlistentry>
 
 
+                        <varlistentry>
+                                <term><varname>keyfile-offset=</varname></term>
+
+                                <listitem><para>Specifies the number
+                                of bytes to skip at the start of
+                                the keyfile; see
+                                <citerefentry><refentrytitle>cryptsetup</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+                                for possible values and the default
+                                value of this option.</para></listitem>
+                        </varlistentry>
+
+
                         <varlistentry>
                                 <term><varname>hash=</varname></term>
 
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