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63 lines
2.8 KiB
63 lines
2.8 KiB
8 months ago
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From 4b28fbe37b02e0df2bd746303108a5e3ed089209 Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Fri, 14 Oct 2022 15:27:34 +0200
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Subject: [PATCH] man: document the new crypttab measurement options
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(cherry picked from commit 572f78767f9958559aa4a3060fc5c9a006766240)
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Related: RHEL-16182
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---
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man/crypttab.xml | 22 ++++++++++++++++++++++
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man/systemd-cryptenroll.xml | 5 +++++
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2 files changed, 27 insertions(+)
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diff --git a/man/crypttab.xml b/man/crypttab.xml
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index cbbb8ab2a9..1dd9bb1bb6 100644
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--- a/man/crypttab.xml
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+++ b/man/crypttab.xml
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@@ -700,6 +700,28 @@
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order).</para></listitem>
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</varlistentry>
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+ <varlistentry>
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+ <term><option>tpm2-measure-pcr=</option></term>
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+
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+ <listitem><para>Controls whether to measure the volume key of the encrypted volume to a TPM2 PCR. If
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+ set to "no" (which is the default) no PCR extension is done. If set to "yes" the volume key is
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+ measured into PCR 15. If set to a decimal integer in the range 0…23 the volume key is measured into
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+ the specified PCR. The volume key is measured along with the activated volume name and its UUID. This
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+ functionality is particularly useful for the encrypted volume backing the root file system, as it
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+ then allows later TPM objects to be securely bound to the root file system and hence the specific
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+ installation.</para></listitem>
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+ </varlistentry>
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+
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+ <varlistentry>
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+ <term><option>tpm2-measure-bank=</option></term>
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+
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+ <listitem><para>Selects one or more TPM2 PCR banks to measure the volume key into, as configured with
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+ <option>tpm2-measure-pcr=</option> above. Multiple banks may be specified, separated by a colon
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+ character. If not specified automatically determines available and used banks. Expects a message
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+ digest name (e.g. <literal>sha1</literal>, <literal>sha256</literal>, …) as argument, to identify the
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+ bank.</para></listitem>
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+ </varlistentry>
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+
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<varlistentry>
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<term><option>token-timeout=</option></term>
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diff --git a/man/systemd-cryptenroll.xml b/man/systemd-cryptenroll.xml
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index ad338cdcc5..f08d95c6fb 100644
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--- a/man/systemd-cryptenroll.xml
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+++ b/man/systemd-cryptenroll.xml
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@@ -324,6 +324,11 @@
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<entry>14</entry>
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<entry>The shim project measures its "MOK" certificates and hashes into this PCR.</entry>
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</row>
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+
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+ <row>
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+ <entry>15</entry>
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+ <entry><citerefentry><refentrytitle>systemd-cryptsetup</refentrytitle><manvolnum>7</manvolnum></citerefentry> optionally measures the volume key of activated LUKS volumes into this PCR.</entry>
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+ </row>
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</tbody>
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</tgroup>
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</table>
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