| 1 | <?xml version="1.0" encoding="UTF-8"?>
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| 2 | <!--
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| 3 | manpage, user manual, usage: VBoxManage modifynvram
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| 4 | -->
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| 5 | <!--
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| 6 | Copyright (C) 2021-2023 Oracle and/or its affiliates.
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| 7 |
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| 8 | This file is part of VirtualBox base platform packages, as
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| 9 | available from https://www.virtualbox.org.
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| 10 |
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| 11 | This program is free software; you can redistribute it and/or
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| 12 | modify it under the terms of the GNU General Public License
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| 13 | as published by the Free Software Foundation, in version 3 of the
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| 14 | License.
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| 15 |
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| 16 | This program is distributed in the hope that it will be useful, but
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| 17 | WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 19 | General Public License for more details.
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| 20 |
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| 21 | You should have received a copy of the GNU General Public License
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| 22 | along with this program; if not, see <https://www.gnu.org/licenses>.
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| 23 |
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| 24 | SPDX-License-Identifier: GPL-3.0-only
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| 25 | -->
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| 26 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 27 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"[
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| 28 | <!ENTITY % all.entities SYSTEM "all-entities.ent">
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| 29 | %all.entities;
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| 30 | ]>
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| 31 | <refentry id="vboxmanage-modifynvram" lang="en">
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| 32 | <refentryinfo>
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| 33 | <pubdate>$Date: 2024-02-22 14:05:31 +0000 (Thu, 22 Feb 2024) $</pubdate>
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| 34 | <title>VBoxManage modifynvram</title>
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| 35 | </refentryinfo>
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| 36 |
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| 37 | <refmeta>
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| 38 | <refentrytitle>VBoxManage-modifynvram</refentrytitle>
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| 39 | <manvolnum>1</manvolnum>
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| 40 | </refmeta>
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| 41 |
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| 42 | <refnamediv>
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| 43 | <refname>VBoxManage-modifynvram</refname>
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| 44 | <refpurpose>List and modify the NVRAM content of a virtual machine</refpurpose>
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| 45 | <refclass>&product-name;</refclass>
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| 46 | </refnamediv>
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| 47 |
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| 48 | <refsynopsisdiv>
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| 49 | <cmdsynopsis id="synopsis-vboxmanage-modifynvram-inituefivarstore">
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| 50 | <command>VBoxManage modifynvram</command>
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| 51 | <group choice="req">
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| 52 | <arg choice="plain"><replaceable>uuid</replaceable></arg>
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| 53 | <arg choice="plain"><replaceable>vmname</replaceable></arg>
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| 54 | </group>
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| 55 | <arg choice="plain">inituefivarstore</arg>
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| 56 | </cmdsynopsis>
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| 57 | <cmdsynopsis id="synopsis-vboxmanage-modifynvram-enrollmssignatures">
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| 58 | <command>VBoxManage modifynvram</command>
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| 59 | <group choice="req">
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| 60 | <arg choice="plain"><replaceable>uuid</replaceable></arg>
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| 61 | <arg choice="plain"><replaceable>vmname</replaceable></arg>
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| 62 | </group>
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| 63 | <arg choice="plain">enrollmssignatures</arg>
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| 64 | </cmdsynopsis>
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| 65 | <cmdsynopsis id="synopsis-vboxmanage-modifynvram-enrollorclpk">
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| 66 | <command>VBoxManage modifynvram</command>
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| 67 | <group choice="req">
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| 68 | <arg choice="plain"><replaceable>uuid</replaceable></arg>
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| 69 | <arg choice="plain"><replaceable>vmname</replaceable></arg>
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| 70 | </group>
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| 71 | <arg choice="plain">enrollorclpk</arg>
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| 72 | </cmdsynopsis>
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| 73 | <cmdsynopsis id="synopsis-vboxmanage-modifynvram-enrollpk">
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| 74 | <command>VBoxManage modifynvram</command>
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| 75 | <group choice="req">
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| 76 | <arg choice="plain"><replaceable>uuid</replaceable></arg>
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| 77 | <arg choice="plain"><replaceable>vmname</replaceable></arg>
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| 78 | </group>
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| 79 | <arg choice="plain">enrollpk</arg>
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| 80 | <arg>--platform-key=<replaceable>filename</replaceable></arg>
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| 81 | <arg>--owner-uuid=<replaceable>uuid</replaceable></arg>
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| 82 | </cmdsynopsis>
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| 83 | <cmdsynopsis id="synopsis-vboxmanage-modifynvram-enrollmok">
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| 84 | <command>VBoxManage modifynvram</command>
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| 85 | <group choice="req">
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| 86 | <arg choice="plain"><replaceable>uuid</replaceable></arg>
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| 87 | <arg choice="plain"><replaceable>vmname</replaceable></arg>
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| 88 | </group>
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| 89 | <arg choice="plain">enrollmok</arg>
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| 90 | <arg>--mok=<replaceable>filename</replaceable></arg>
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| 91 | <arg>--owner-uuid=<replaceable>uuid</replaceable></arg>
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| 92 | </cmdsynopsis>
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| 93 | <cmdsynopsis id="synopsis-vboxmanage-modifynvram-secureboot">
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| 94 | <command>VBoxManage modifynvram</command>
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| 95 | <group choice="req">
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| 96 | <arg choice="plain"><replaceable>uuid</replaceable></arg>
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| 97 | <arg choice="plain"><replaceable>vmname</replaceable></arg>
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| 98 | </group>
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| 99 | <arg choice="plain">secureboot</arg>
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| 100 | <group choice="req">
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| 101 | <arg choice="plain">--enable</arg>
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| 102 | <arg choice="plain">--disable</arg>
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| 103 | </group>
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| 104 | </cmdsynopsis>
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| 105 | <cmdsynopsis id="synopsis-vboxmanage-modifynvram-listvars">
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| 106 | <command>VBoxManage modifynvram</command>
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| 107 | <group choice="req">
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| 108 | <arg choice="plain"><replaceable>uuid</replaceable></arg>
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| 109 | <arg choice="plain"><replaceable>vmname</replaceable></arg>
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| 110 | </group>
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| 111 | <arg choice="plain">listvars</arg>
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| 112 | </cmdsynopsis>
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| 113 | <cmdsynopsis id="synopsis-vboxmanage-modifynvram-queryvar">
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| 114 | <command>VBoxManage modifynvram</command>
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| 115 | <group choice="req">
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| 116 | <arg choice="plain"><replaceable>uuid</replaceable></arg>
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| 117 | <arg choice="plain"><replaceable>vmname</replaceable></arg>
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| 118 | </group>
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| 119 | <arg choice="plain">queryvar</arg>
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| 120 | <arg>--name=<replaceable>name</replaceable></arg>
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| 121 | <arg>--filename=<replaceable>filename</replaceable></arg>
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| 122 | </cmdsynopsis>
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| 123 | <cmdsynopsis id="synopsis-vboxmanage-modifynvram-deletevar">
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| 124 | <command>VBoxManage modifynvram</command>
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| 125 | <group choice="req">
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| 126 | <arg choice="plain"><replaceable>uuid</replaceable></arg>
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| 127 | <arg choice="plain"><replaceable>vmname</replaceable></arg>
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| 128 | </group>
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| 129 | <arg choice="plain">deletevar</arg>
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| 130 | <arg>--name=<replaceable>name</replaceable></arg>
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| 131 | <arg>--owner-uuid=<replaceable>uuid</replaceable></arg>
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| 132 | </cmdsynopsis>
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| 133 | <cmdsynopsis id="synopsis-vboxmanage-modifynvram-changevar">
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| 134 | <command>VBoxManage modifynvram</command>
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| 135 | <group choice="req">
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| 136 | <arg choice="plain"><replaceable>uuid</replaceable></arg>
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| 137 | <arg choice="plain"><replaceable>vmname</replaceable></arg>
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| 138 | </group>
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| 139 | <arg choice="plain">changevar</arg>
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| 140 | <arg>--name=<replaceable>name</replaceable></arg>
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| 141 | <arg>--filename=<replaceable>filename</replaceable></arg>
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| 142 | </cmdsynopsis>
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| 143 | </refsynopsisdiv>
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| 144 |
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| 145 | <refsect1 id="vboxmanage-modifynvram-description">
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| 146 | <title>Description</title>
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| 147 |
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| 148 | <para>The "modifynvram" commands are for experts who want to inspect and modify the
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| 149 | UEFI variable store of a virtual machine. Any mistakes done here can bring the virtual
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| 150 | machine in a non working state.</para>
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| 151 |
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| 152 | <refsect2 id="vboxmanage-modifynvram-common-options">
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| 153 | <title>Common options</title>
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| 154 | <remark role="help-scope" condition="GLOBAL"/>
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| 155 | <para>The subcommands of <command>modifynvram</command> all operate on a running virtual
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| 156 | machine:</para>
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| 157 | <variablelist>
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| 158 | <varlistentry>
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| 159 | <term><option><replaceable>uuid</replaceable> | <replaceable>vmname</replaceable></option></term>
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| 160 | <listitem><para>Either the UUID or the name (case sensitive) of a VM.</para></listitem>
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| 161 | </varlistentry>
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| 162 | </variablelist>
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| 163 | </refsect2>
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| 164 |
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| 165 | <refsect2 id="vboxmanage-modifynvram-inituefivarstore">
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| 166 | <title>modifynvram inituefivarstore</title>
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| 167 | <remark role="help-copy-synopsis"/>
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| 168 | <para>
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| 169 | Iniitalizes the UEFI variable store to a default state. Any previous existing variable
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| 170 | store is deleted. Use with extreme caution!
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| 171 | </para>
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| 172 | </refsect2>
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| 173 |
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| 174 | <refsect2 id="vboxmanage-modifynvram-enrollmssignatures">
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| 175 | <title>modifynvram enrollmssignatures</title>
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| 176 | <remark role="help-copy-synopsis"/>
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| 177 | <para>
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| 178 | Enrolls the default Microsoft KEK and DB signatures required for UEFI secure boot.
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| 179 | </para>
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| 180 | </refsect2>
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| 181 |
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| 182 | <refsect2 id="vboxmanage-modifynvram-enrollorclpk">
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| 183 | <title>modifynvram enrollorclpk</title>
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| 184 | <remark role="help-copy-synopsis"/>
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| 185 | <para>
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| 186 | Enrolls the default platform key provided by Oracle required for UEFI secure boot.
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| 187 | </para>
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| 188 | </refsect2>
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| 189 |
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| 190 | <refsect2 id="vboxmanage-modifynvram-enrollpk">
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| 191 | <title>modifynvram enrollpk</title>
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| 192 | <remark role="help-copy-synopsis"/>
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| 193 | <para>
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| 194 | Enrolls a custom platform key provided by the user required for UEFI secure boot.
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| 195 | The following commands use openssl to generate a new platform key:
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| 196 | </para>
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| 197 | <screen>$ openssl req -new -x509 -newkey rsa:2048 -keyout PK.key -out PK.crt</screen>
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| 198 | <screen>$ openssl x509 -in PK.crt -out PK.cer -outform DER</screen>
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| 199 | <variablelist>
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| 200 | <varlistentry>
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| 201 | <term><option>--platform-key=<replaceable>filename</replaceable></option></term>
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| 202 | <listitem><para>The platform key provided as a DER encoded X.509 signature.</para>
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| 203 | </listitem>
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| 204 | </varlistentry>
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| 205 | <varlistentry>
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| 206 | <term><option>--owner-uuid=<replaceable>uuid</replaceable></option></term>
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| 207 | <listitem><para>The UUID identifying the owner of the platform key.</para>
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| 208 | </listitem>
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| 209 | </varlistentry>
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| 210 | </variablelist>
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| 211 | </refsect2>
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| 212 |
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| 213 | <refsect2 id="vboxmanage-modifynvram-secureboot">
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| 214 | <title>modifynvram secureboot</title>
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| 215 | <remark role="help-copy-synopsis"/>
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| 216 | <para>
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| 217 | Enables or disables UEFI secure boot.
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| 218 | </para>
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| 219 | <variablelist>
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| 220 | <varlistentry>
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| 221 | <term><option>--enable></option></term>
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| 222 | <listitem><para>Enables UEFI secure boot if the state of the key
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| 223 | enrolment permits.</para>
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| 224 | </listitem>
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| 225 | </varlistentry>
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| 226 | <varlistentry>
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| 227 | <term><option>--disable></option></term>
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| 228 | <listitem><para>Disables UEFI secure boot.</para>
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| 229 | </listitem>
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| 230 | </varlistentry>
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| 231 | </variablelist>
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| 232 | </refsect2>
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| 233 |
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| 234 | <refsect2 id="vboxmanage-modifynvram-listvars">
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| 235 | <title>modifynvram listvars</title>
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| 236 | <remark role="help-copy-synopsis"/>
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| 237 | <para>
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| 238 | Lists all UEFI variables in the virtual machines's store along with their owner UUID.
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| 239 | </para>
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| 240 | </refsect2>
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| 241 |
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| 242 | <refsect2 id="vboxmanage-modifynvram-queryvar">
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| 243 | <title>modifynvram queryvar</title>
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| 244 | <remark role="help-copy-synopsis"/>
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| 245 | <para>
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| 246 | Queries the content of a given UEFI variable identified by its name.
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| 247 | </para>
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| 248 | <variablelist>
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| 249 | <varlistentry>
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| 250 | <term><option>--name=<replaceable>name</replaceable></option></term>
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| 251 | <listitem><para>UEFI variable name to query.</para>
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| 252 | </listitem>
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| 253 | </varlistentry>
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| 254 | <varlistentry>
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| 255 | <term><option>--filename=<replaceable>filename</replaceable></option></term>
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| 256 | <listitem>
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| 257 | <para>
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| 258 | Where to store the content of the variable upon success. This is optional,
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| 259 | if omitted the content will be dumped to the terminal as a hex dump.
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| 260 | </para>
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| 261 | </listitem>
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| 262 | </varlistentry>
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| 263 | </variablelist>
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| 264 | </refsect2>
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| 265 |
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| 266 | <refsect2 id="vboxmanage-modifynvram-deletevar">
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| 267 | <title>modifynvram deletevar</title>
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| 268 | <remark role="help-copy-synopsis"/>
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| 269 | <para>
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| 270 | Deletes the given variable identified by its name and owner UUID.
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| 271 | </para>
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| 272 | <variablelist>
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| 273 | <varlistentry>
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| 274 | <term><option>--name=<replaceable>name</replaceable></option></term>
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| 275 | <listitem><para>UEFI variable name to delete.</para>
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| 276 | </listitem>
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| 277 | </varlistentry>
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| 278 | <varlistentry>
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| 279 | <term><option>--owner-uuid=<replaceable>uuid</replaceable></option></term>
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| 280 | <listitem><para>The UUID identifying the owner of the variable to delete.</para>
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| 281 | </listitem>
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| 282 | </varlistentry>
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| 283 | </variablelist>
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| 284 | </refsect2>
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| 285 |
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| 286 | <refsect2 id="vboxmanage-modifynvram-changevar">
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| 287 | <title>modifynvram changevar</title>
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| 288 | <remark role="help-copy-synopsis"/>
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| 289 | <para>
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| 290 | Changes the UEFI variable content to the one form the given file.
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| 291 | </para>
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| 292 | <variablelist>
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| 293 | <varlistentry>
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| 294 | <term><option>--name=<replaceable>name</replaceable></option></term>
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| 295 | <listitem><para>UEFI variable name to change the data for.</para>
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| 296 | </listitem>
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| 297 | </varlistentry>
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| 298 | <varlistentry>
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| 299 | <term><option>--filename=<replaceable>filename</replaceable></option></term>
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| 300 | <listitem>
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| 301 | <para>The file to read the data from.</para>
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| 302 | </listitem>
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| 303 | </varlistentry>
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| 304 | </variablelist>
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| 305 | </refsect2>
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| 306 |
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| 307 | </refsect1>
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| 308 | </refentry>
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