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systemd/SOURCES/0407-Backport-ukify-from-up...

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import systemd-252-32.el9_4
6 months ago
From bcc54c0a5743a309654823eeb72b5b5dc24c9062 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Wed, 22 Nov 2023 13:07:56 +0100
Subject: [PATCH] Backport ukify from upstream
This is based off v255-rc2.
Resolves: RHEL-13199
---
man/rules/meson.build | 1 +
man/uki.conf.example | 14 +
man/ukify.xml | 685 +++++++
meson.build | 25 +
meson_options.txt | 2 +
src/ukify/test/example.signing.crt.base64 | 23 +
src/ukify/test/example.signing.key.base64 | 30 +
.../test/example.tpm2-pcr-private.pem.base64 | 30 +
.../test/example.tpm2-pcr-private2.pem.base64 | 30 +
.../test/example.tpm2-pcr-public.pem.base64 | 8 +
.../test/example.tpm2-pcr-public2.pem.base64 | 8 +
src/ukify/test/meson.build | 20 +
src/ukify/test/test_ukify.py | 848 +++++++++
src/ukify/ukify.py | 1660 +++++++++++++++++
14 files changed, 3384 insertions(+)
create mode 100644 man/uki.conf.example
create mode 100644 man/ukify.xml
create mode 100644 src/ukify/test/example.signing.crt.base64
create mode 100644 src/ukify/test/example.signing.key.base64
create mode 100644 src/ukify/test/example.tpm2-pcr-private.pem.base64
create mode 100644 src/ukify/test/example.tpm2-pcr-private2.pem.base64
create mode 100644 src/ukify/test/example.tpm2-pcr-public.pem.base64
create mode 100644 src/ukify/test/example.tpm2-pcr-public2.pem.base64
create mode 100644 src/ukify/test/meson.build
create mode 100755 src/ukify/test/test_ukify.py
create mode 100755 src/ukify/ukify.py
diff --git a/man/rules/meson.build b/man/rules/meson.build
index bb7799036d..c7045840f2 100644
--- a/man/rules/meson.build
+++ b/man/rules/meson.build
@@ -1189,6 +1189,7 @@ manpages = [
''],
['udev_new', '3', ['udev_ref', 'udev_unref'], ''],
['udevadm', '8', [], ''],
+ ['ukify', '1', [], 'ENABLE_UKIFY'],
['user@.service',
'5',
['systemd-user-runtime-dir', 'user-runtime-dir@.service'],
diff --git a/man/uki.conf.example b/man/uki.conf.example
new file mode 100644
index 0000000000..84a9f77b8d
--- /dev/null
+++ b/man/uki.conf.example
@@ -0,0 +1,14 @@
+[UKI]
+SecureBootPrivateKey=/etc/kernel/secure-boot.key.pem
+SecureBootCertificate=/etc/kernel/secure-boot.cert.pem
+
+[PCRSignature:initrd]
+Phases=enter-initrd
+PCRPrivateKey=/etc/kernel/pcr-initrd.key.pem
+PCRPublicKey=/etc/kernel/pcr-initrd.pub.pem
+
+[PCRSignature:system]
+Phases=enter-initrd:leave-initrd enter-initrd:leave-initrd:sysinit
+ enter-initrd:leave-initrd:sysinit:ready
+PCRPrivateKey=/etc/kernel/pcr-system.key.pem
+PCRPublicKey=/etc/kernel/pcr-system.pub.pem
diff --git a/man/ukify.xml b/man/ukify.xml
new file mode 100644
index 0000000000..eff74ca150
--- /dev/null
+++ b/man/ukify.xml
@@ -0,0 +1,685 @@
+<?xml version="1.0"?>
+<!--*-nxml-*-->
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+ "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
+<refentry id="ukify" xmlns:xi="http://www.w3.org/2001/XInclude" conditional='ENABLE_UKIFY'>
+
+ <refentryinfo>
+ <title>ukify</title>
+ <productname>systemd</productname>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>ukify</refentrytitle>
+ <manvolnum>1</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>ukify</refname>
+ <refpurpose>Combine components into a signed Unified Kernel Image for UEFI systems</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <cmdsynopsis>
+ <command>ukify</command>
+ <arg choice="opt" rep="repeat">OPTIONS</arg>
+ <arg choice="plain">build</arg>
+ </cmdsynopsis>
+
+ <cmdsynopsis>
+ <command>ukify</command>
+ <arg choice="opt" rep="repeat">OPTIONS</arg>
+ <arg choice="plain">genkey</arg>
+ </cmdsynopsis>
+
+ <cmdsynopsis>
+ <command>ukify</command>
+ <arg choice="opt" rep="repeat">OPTIONS</arg>
+ <arg choice="plain">inspect</arg>
+ <arg choice="plain" rep="repeat">FILE</arg>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><command>ukify</command> is a tool whose primary purpose is to combine components (usually a
+ kernel, an initrd, and a UEFI boot stub) to create a
+ <ulink url="https://uapi-group.org/specifications/specs/unified_kernel_image/">Unified Kernel Image (UKI)</ulink>
+ — a PE binary that can be executed by the firmware to start the embedded linux kernel.
+ See <citerefentry><refentrytitle>systemd-stub</refentrytitle><manvolnum>7</manvolnum></citerefentry>
+ for details about the stub.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Commands</title>
+
+ <para>The following commands are understood:</para>
+
+ <refsect2>
+ <title><command>build</command></title>
+
+ <para>This command creates a Unified Kernel Image. The two primary options that should be specified for
+ the <command>build</command> verb are <varname>Linux=</varname>/<option>--linux=</option>, and
+ <varname>Initrd=</varname>/<option>--initrd=</option>. <varname>Initrd=</varname> accepts multiple
+ whitespace-separated paths and <option>--initrd=</option> can be specified multiple times.</para>
+
+ <para>Additional sections will be inserted into the UKI, either automatically or only if a specific
+ option is provided. See the discussions of
+ <varname>Cmdline=</varname>/<option>--cmdline=</option>,
+ <varname>OSRelease=</varname>/<option>--os-release=</option>,
+ <varname>DeviceTree=</varname>/<option>--devicetree=</option>,
+ <varname>Splash=</varname>/<option>--splash=</option>,
+ <varname>PCRPKey=</varname>/<option>--pcrpkey=</option>,
+ <varname>Uname=</varname>/<option>--uname=</option>,
+ <varname>SBAT=</varname>/<option>--sbat=</option>,
+ and <option>--section=</option>
+ below.</para>
+
+ <para><command>ukify</command> can also be used to assemble a PE binary that is not executable but
+ contains auxiliary data, for example additional kernel command line entries.</para>
+
+ <para>If PCR signing keys are provided via the
+ <varname>PCRPrivateKey=</varname>/<option>--pcr-private-key=</option> and
+ <varname>PCRPublicKey=</varname>/<option>--pcr-public-key=</option> options, PCR values that will be seen
+ after booting with the given kernel, initrd, and other sections, will be calculated, signed, and embedded
+ in the UKI.
+ <citerefentry><refentrytitle>systemd-measure</refentrytitle><manvolnum>1</manvolnum></citerefentry> is
+ used to perform this calculation and signing.</para>
+
+ <para>The calculation of PCR values is done for specific boot phase paths. Those can be specified with
+ the <varname>Phases=</varname>/<option>--phases=</option> option. If not specified, the default provided
+ by <command>systemd-measure</command> is used. It is also possible to specify the
+ <varname>PCRPrivateKey=</varname>/<option>--pcr-private-key=</option>,
+ <varname>PCRPublicKey=</varname>/<option>--pcr-public-key=</option>, and
+ <varname>Phases=</varname>/<option>--phases=</option> arguments more than once. Signatures will then be
+ performed with each of the specified keys. On the command line, when both <option>--phases=</option> and
+ <option>--pcr-private-key=</option> are used, they must be specified the same number of times, and then
+ the n-th boot phase path set will be signed by the n-th key. This can be used to build different trust
+ policies for different phases of the boot. In the config file, <varname>PCRPrivateKey=</varname>,
+ <varname>PCRPublicKey=</varname>, and <varname>Phases=</varname> are grouped into separate sections,
+ describing separate boot phases.</para>
+
+ <para>If a SecureBoot signing key is provided via the
+ <varname>SecureBootPrivateKey=</varname>/<option>--secureboot-private-key=</option> option, the resulting
+ PE binary will be signed as a whole, allowing the resulting UKI to be trusted by SecureBoot. Also see the
+ discussion of automatic enrollment in
+ <citerefentry><refentrytitle>systemd-boot</refentrytitle><manvolnum>7</manvolnum></citerefentry>.
+ </para>
+
+ <para>If the stub and/or the kernel contain <literal>.sbat</literal> sections they will be merged in
+ the UKI so that revocation updates affecting either are considered when the UKI is loaded by Shim. For
+ more information on SBAT see
+ <ulink url="https://github.com/rhboot/shim/blob/main/SBAT.md">Shim documentation</ulink>.
+ </para>
+ </refsect2>
+
+ <refsect2>
+ <title><command>genkey</command></title>
+
+ <para>This command creates the keys for PCR signing and the key and certificate used for SecureBoot
+ signing. The same configuration options that determine what keys and in which paths will be needed for
+ signing when <command>build</command> is used, here determine which keys will be created. See the
+ discussion of <varname>PCRPrivateKey=</varname>/<option>--pcr-private-key=</option>,
+ <varname>PCRPublicKey=</varname>/<option>--pcr-public-key=</option>, and
+ <varname>SecureBootPrivateKey=</varname>/<option>--secureboot-private-key=</option> below.</para>
+
+ <para>The output files must not exist.</para>
+ </refsect2>
+
+ <refsect2>
+ <title><command>inspect</command></title>
+
+ <para>Display information about the sections in a given binary or binaries.
+ If <option>--all</option> is given, all sections are shown.
+ Otherwise, if <option>--section=</option> option is specified at least once, only those sections are shown.
+ Otherwise, well-known sections that are typically included in an UKI are shown.
+ For each section, its name, size, and sha256-digest is printed.
+ For text sections, the contents are printed.</para>
+
+ <para>Also see the description of <option>-j</option>/<option>--json=</option> and
+ <option>--section=</option>.</para>
+ </refsect2>
+ </refsect1>
+
+ <refsect1>
+ <title>Configuration settings</title>
+
+ <para>Settings can appear in configuration files (the syntax with <varname
+ index='false'>SomeSetting=<replaceable>value</replaceable></varname>) and on the command line (the syntax
+ with <option index='false'>--some-setting=<replaceable>value</replaceable></option>). For some command
+ line parameters, a single-letter shortcut is also allowed. In the configuration files, the setting must
+ be in the appropriate section, so the descriptions are grouped by section below. When the same setting
+ appears in the configuration file and on the command line, generally the command line setting has higher
+ priority and overwrites the config file setting completely. If some setting behaves differently, this is
+ described below.</para>
+
+ <para>If no config file is provided via the option <option>--config=<replaceable>PATH</replaceable></option>,
+ <command>ukify</command> will try to look for a default configuration file in the following paths in this
+ order: <filename>/run/systemd/ukify.conf</filename>, <filename>/etc/systemd/ukify.conf</filename>,
+ <filename>/usr/local/lib/systemd/ukify.conf</filename>, and <filename>/usr/lib/systemd/ukify.conf</filename>,
+ and then load the first one found. <command>ukify</command> will proceed normally if no configuration file
+ is specified and no default one is found.</para>
+
+ <para>The <replaceable>LINUX</replaceable> and <replaceable>INITRD</replaceable> positional arguments, or
+ the equivalent <varname>Linux=</varname> and <varname>Initrd=</varname> settings, are optional. If more
+ than one initrd is specified, they will all be combined into a single PE section. This is useful to, for
+ example, prepend microcode before the actual initrd.</para>
+
+ <para>The following options and settings are understood:</para>
+
+ <refsect2>
+ <title>Command line-only options</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><option>--config=<replaceable>PATH</replaceable></option></term>
+
+ <listitem><para>Load configuration from the given config file. In general, settings specified in
+ the config file have lower precedence than the settings specified via options. In cases where the
+ command line option does not fully override the config file setting are explicitly mentioned in the
+ descriptions of individual options.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--measure</option></term>
+ <term><option>--no-measure</option></term>
+
+ <listitem><para>Enable or disable a call to
+ <citerefentry><refentrytitle>systemd-measure</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ to print pre-calculated PCR values. Defaults to false.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--section=<replaceable>NAME</replaceable>:<replaceable>TEXT</replaceable>|<replaceable>@PATH</replaceable></option></term>
+ <term><option>--section=<replaceable>NAME</replaceable>:<arg choice="plain">text|binary</arg><optional>@<replaceable>PATH</replaceable></optional></option></term>
+
+ <listitem><para>For all verbs except <command>inspect</command>, the first syntax is used.
+ Specify an arbitrary additional section <literal><replaceable>NAME</replaceable></literal>.
+ The argument may be a literal string, or <literal>@</literal> followed by a path name.
+ This option may be specified more than once. Any sections specified in this fashion will be
+ inserted (in order) before the <literal>.linux</literal> section which is always last.</para>
+
+ <para>For the <command>inspect</command> verb, the second syntax is used.
+ The section <replaceable>NAME</replaceable> will be inspected (if found).
+ If the second argument is <literal>text</literal>, the contents will be printed.
+ If the third argument is given, the contents will be saved to file <replaceable>PATH</replaceable>.
+ </para>
+
+ <para>Note that the name is used as-is, and if the section name should start with a dot, it must be
+ included in <replaceable>NAME</replaceable>.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--tools=<replaceable>DIRS</replaceable></option></term>
+
+ <listitem><para>Specify one or more directories with helper tools. <command>ukify</command> will
+ look for helper tools in those directories first, and if not found, try to load them from
+ <varname>$PATH</varname> in the usual fashion.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--output=<replaceable>FILENAME</replaceable></option></term>
+
+ <listitem><para>The output filename. If not specified, the name of the
+ <replaceable>LINUX</replaceable> argument, with the suffix <literal>.unsigned.efi</literal> or
+ <literal>.signed.efi</literal> will be used, depending on whether signing for SecureBoot was
+ performed.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--summary</option></term>
+
+ <listitem><para>Print a summary of loaded config and exit. This is useful to check how the options
+ from the configuration file and the command line are combined.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--all</option></term>
+
+ <listitem><para>Print all sections (with <command>inspect</command> verb).</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--json</option></term>
+
+ <listitem><para>Generate JSON output (with <command>inspect</command> verb).</para>
+
+ </listitem>
+ </varlistentry>
+
+ <xi:include href="standard-options.xml" xpointer="help" />
+ <xi:include href="standard-options.xml" xpointer="version" />
+ </variablelist>
+ </refsect2>
+
+ <refsect2>
+ <title>[UKI] section</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><varname>Linux=<replaceable>LINUX</replaceable></varname></term>
+ <term><option>--linux=<replaceable>LINUX</replaceable></option></term>
+
+ <listitem><para>A path to the kernel binary.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>Initrd=<replaceable>INITRD</replaceable>...</varname></term>
+ <term><option>--initrd=<replaceable>LINUX</replaceable></option></term>
+
+ <listitem><para>Zero or more initrd paths. In the configuration file, items are separated by
+ whitespace. The initrds are combined in the order of specification, with the initrds specified in
+ the config file first.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>Cmdline=<replaceable>TEXT</replaceable>|<replaceable>@PATH</replaceable></varname></term>
+ <term><option>--cmdline=<replaceable>TEXT</replaceable>|<replaceable>@PATH</replaceable></option></term>
+
+ <listitem><para>The kernel command line (the <literal>.cmdline</literal> section). The argument may
+ be a literal string, or <literal>@</literal> followed by a path name. If not specified, no command
+ line will be embedded.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>OSRelease=<replaceable>TEXT</replaceable>|<replaceable>@PATH</replaceable></varname></term>
+ <term><option>--os-release=<replaceable>TEXT</replaceable>|<replaceable>@PATH</replaceable></option></term>
+
+ <listitem><para>The os-release description (the <literal>.osrel</literal> section). The argument
+ may be a literal string, or <literal>@</literal> followed by a path name. If not specified, the
+ <citerefentry><refentrytitle>os-release</refentrytitle><manvolnum>5</manvolnum></citerefentry> file
+ will be picked up from the host system.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>DeviceTree=<replaceable>PATH</replaceable></varname></term>
+ <term><option>--devicetree=<replaceable>PATH</replaceable></option></term>
+
+ <listitem><para>The devicetree description (the <literal>.dtb</literal> section). The argument is a
+ path to a compiled binary DeviceTree file. If not specified, the section will not be present.
+ </para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>Splash=<replaceable>PATH</replaceable></varname></term>
+ <term><option>--splash=<replaceable>PATH</replaceable></option></term>
+
+ <listitem><para>A picture to display during boot (the <literal>.splash</literal> section). The
+ argument is a path to a BMP file. If not specified, the section will not be present.
+ </para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>PCRPKey=<replaceable>PATH</replaceable></varname></term>
+ <term><option>--pcrpkey=<replaceable>PATH</replaceable></option></term>
+
+ <listitem><para>A path to a public key to embed in the <literal>.pcrpkey</literal> section. If not
+ specified, and there's exactly one
+ <varname>PCRPublicKey=</varname>/<option>--pcr-public-key=</option> argument, that key will be used.
+ Otherwise, the section will not be present.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>Uname=<replaceable>VERSION</replaceable></varname></term>
+ <term><option>--uname=<replaceable>VERSION</replaceable></option></term>
+
+ <listitem><para>Specify the kernel version (as in <command>uname -r</command>, the
+ <literal>.uname</literal> section). If not specified, an attempt will be made to extract the
+ version string from the kernel image. It is recommended to pass this explicitly if known, because
+ the extraction is based on heuristics and not very reliable. If not specified and extraction fails,
+ the section will not be present.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>PCRBanks=<replaceable>PATH</replaceable></varname></term>
+ <term><option>--pcr-banks=<replaceable>PATH</replaceable></option></term>
+
+ <listitem><para>A comma or space-separated list of PCR banks to sign a policy for. If not present,
+ all known banks will be used (<literal>sha1</literal>, <literal>sha256</literal>,
+ <literal>sha384</literal>, <literal>sha512</literal>), which will fail if not supported by the
+ system.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>SecureBootSigningTool=<replaceable>SIGNER</replaceable></varname></term>
+ <term><option>--signtool=<replaceable>SIGNER</replaceable></option></term>
+
+ <listitem><para>Whether to use <literal>sbsign</literal> or <literal>pesign</literal>.
+ Depending on this choice, different parameters are required in order to sign an image.
+ Defaults to <literal>sbsign</literal>.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>SecureBootPrivateKey=<replaceable>SB_KEY</replaceable></varname></term>
+ <term><option>--secureboot-private-key=<replaceable>SB_KEY</replaceable></option></term>
+
+ <listitem><para>A path to a private key to use for signing of the resulting binary. If the
+ <varname>SigningEngine=</varname>/<option>--signing-engine=</option> option is used, this may also be
+ an engine-specific designation. This option is required by
+ <varname>SecureBootSigningTool=sbsign</varname>/<option>--signtool=sbsign</option>. </para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>SecureBootCertificate=<replaceable>SB_CERT</replaceable></varname></term>
+ <term><option>--secureboot-certificate=<replaceable>SB_CERT</replaceable></option></term>
+
+ <listitem><para>A path to a certificate to use for signing of the resulting binary. If the
+ <varname>SigningEngine=</varname>/<option>--signing-engine=</option> option is used, this may also
+ be an engine-specific designation. This option is required by
+ <varname>SecureBootSigningTool=sbsign</varname>/<option>--signtool=sbsign</option>. </para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>SecureBootCertificateDir=<replaceable>SB_PATH</replaceable></varname></term>
+ <term><option>--secureboot-certificate-dir=<replaceable>SB_PATH</replaceable></option></term>
+
+ <listitem><para>A path to a nss certificate database directory to use for signing of the resulting binary.
+ Takes effect when <varname>SecureBootSigningTool=pesign</varname>/<option>--signtool=pesign</option> is used.
+ Defaults to <filename>/etc/pki/pesign</filename>.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>SecureBootCertificateName=<replaceable>SB_CERTNAME</replaceable></varname></term>
+ <term><option>--secureboot-certificate-name=<replaceable>SB_CERTNAME</replaceable></option></term>
+
+ <listitem><para>The name of the nss certificate database entry to use for signing of the resulting binary.
+ This option is required by <varname>SecureBootSigningTool=pesign</varname>/<option>--signtool=pesign</option>.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>SecureBootCertificateValidity=<replaceable>DAYS</replaceable></varname></term>
+ <term><option>--secureboot-certificate-validity=<replaceable>DAYS</replaceable></option></term>
+
+ <listitem><para>Period of validity (in days) for a certificate created by
+ <command>genkey</command>. Defaults to 3650, i.e. 10 years.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>SigningEngine=<replaceable>ENGINE</replaceable></varname></term>
+ <term><option>--signing-engine=<replaceable>ENGINE</replaceable></option></term>
+
+ <listitem><para>An "engine" for signing of the resulting binary. This option is currently passed
+ verbatim to the <option>--engine=</option> option of
+ <citerefentry project='archlinux'><refentrytitle>sbsign</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
+ </para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>SignKernel=<replaceable>BOOL</replaceable></varname></term>
+ <term><option>--sign-kernel</option></term>
+ <term><option>--no-sign-kernel</option></term>
+
+ <listitem><para>Override the detection of whether to sign the Linux binary itself before it is
+ embedded in the combined image. If not specified, it will be signed if a SecureBoot signing key is
+ provided via the
+ <varname>SecureBootPrivateKey=</varname>/<option>--secureboot-private-key=</option> option and the
+ binary has not already been signed. If
+ <varname>SignKernel=</varname>/<option>--sign-kernel</option> is true, and the binary has already
+ been signed, the signature will be appended anyway.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>SBAT=<replaceable>TEXT</replaceable>|<replaceable>@PATH</replaceable></varname></term>
+ <term><option>--sbat=<replaceable>TEXT</replaceable>|<replaceable>@PATH</replaceable></option></term>
+
+ <listitem><para>SBAT metadata associated with the UKI or addon. SBAT policies are useful to revoke
+ whole groups of UKIs or addons with a single, static policy update that does not take space in
+ DBX/MOKX. If not specified manually, a default metadata entry consisting of
+ <literal>uki,1,UKI,uki,1,https://www.freedesktop.org/software/systemd/man/systemd-stub.html</literal>
+ will be used, to ensure it is always possible to revoke UKIs and addons. For more information on
+ SBAT see <ulink url="https://github.com/rhboot/shim/blob/main/SBAT.md">Shim documentation</ulink>.
+ </para>
+
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect2>
+
+ <refsect2>
+ <title>[PCRSignature:<replaceable>NAME</replaceable>] section</title>
+
+ <para>In the config file, those options are grouped by section. On the command line, they
+ must be specified in the same order. The sections specified in both sources are combined.
+ </para>
+
+ <variablelist>
+ <varlistentry>
+ <term><varname>PCRPrivateKey=<replaceable>PATH</replaceable></varname></term>
+ <term><option>--pcr-private-key=<replaceable>PATH</replaceable></option></term>
+
+ <listitem><para>A private key to use for signing PCR policies. On the command line, this option may
+ be specified more than once, in which case multiple signatures will be made.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>PCRPublicKey=<replaceable>PATH</replaceable></varname></term>
+ <term><option>--pcr-public-key=<replaceable>PATH</replaceable></option></term>
+
+ <listitem><para>A public key to use for signing PCR policies.</para>
+
+ <para>On the command line, this option may be specified more than once, similarly to the
+ <option>--pcr-private-key=</option> option. If not present, the public keys will be extracted from
+ the private keys. On the command line, if present, this option must be specified the same number of
+ times as the <option>--pcr-private-key=</option> option.</para>
+
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>Phases=<replaceable>LIST</replaceable></varname></term>
+ <term><option>--phases=<replaceable>LIST</replaceable></option></term>
+
+ <listitem><para>A comma or space-separated list of colon-separated phase paths to sign a policy
+ for. Each set of boot phase paths will be signed with the corresponding private key. If not
+ present, the default of
+ <citerefentry><refentrytitle>systemd-measure</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ will be used.</para>
+
+ <para>On the command line, when this argument is present, it must appear the same number of times as
+ the <option>--pcr-private-key=</option> option. </para>
+
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect2>
+ </refsect1>
+
+ <refsect1>
+ <title>Examples</title>
+
+ <example>
+ <title>Minimal invocation</title>
+
+ <programlisting>$ ukify build \
+ --linux=/lib/modules/6.0.9-300.fc37.x86_64/vmlinuz \
+ --initrd=/some/path/initramfs-6.0.9-300.fc37.x86_64.img \
+ --cmdline='quiet rw'
+ </programlisting>
+
+ <para>This creates an unsigned UKI <filename>./vmlinuz.unsigned.efi</filename>.</para>
+ </example>
+
+ <example>
+ <title>All the bells and whistles</title>
+
+ <programlisting>$ ukify build \
+ --linux=/lib/modules/6.0.9-300.fc37.x86_64/vmlinuz \
+ --initrd=early_cpio \
+ --initrd=/some/path/initramfs-6.0.9-300.fc37.x86_64.img \
+ --sbat='sbat,1,SBAT Version,sbat,1,https://github.com/rhboot/shim/blob/main/SBAT.md
+ uki.author.myimage,1,UKI for System,uki.author.myimage,1,https://www.freedesktop.org/software/systemd/man/systemd-stub.html' \
+ --pcr-private-key=pcr-private-initrd-key.pem \
+ --pcr-public-key=pcr-public-initrd-key.pem \
+ --phases='enter-initrd' \
+ --pcr-private-key=pcr-private-system-key.pem \
+ --pcr-public-key=pcr-public-system-key.pem \
+ --phases='enter-initrd:leave-initrd enter-initrd:leave-initrd:sysinit \
+ enter-initrd:leave-initrd:sysinit:ready' \
+ --pcr-banks=sha384,sha512 \
+ --secureboot-private-key=sb.key \
+ --secureboot-certificate=sb.cert \
+ --sign-kernel \
+ --cmdline='quiet rw rhgb'
+ </programlisting>
+
+ <para>This creates a signed UKI <filename index='false'>./vmlinuz.signed.efi</filename>.
+ The initrd section contains two concatenated parts, <filename index='false'>early_cpio</filename>
+ and <filename index='false'>initramfs-6.0.9-300.fc37.x86_64.img</filename>.
+ The policy embedded in the <literal>.pcrsig</literal> section will be signed for the initrd (the
+ <constant>enter-initrd</constant> phase) with the key
+ <filename index='false'>pcr-private-initrd-key.pem</filename>, and for the main system (phases
+ <constant>leave-initrd</constant>, <constant>sysinit</constant>, <constant>ready</constant>) with the
+ key <filename index='false'>pcr-private-system-key.pem</filename>. The Linux binary and the resulting
+ combined image will be signed with the SecureBoot key <filename index='false'>sb.key</filename>.</para>
+ </example>
+
+ <example>
+ <title>All the bells and whistles, via a config file</title>
+
+ <para>This is the same as the previous example, but this time the configuration is stored in a
+ file:</para>
+
+ <programlisting>$ cat ukify.conf
+[UKI]
+Initrd=early_cpio
+Cmdline=quiet rw rhgb
+
+SecureBootPrivateKey=sb.key
+SecureBootCertificate=sb.cert
+SignKernel=yes
+PCRBanks=sha384,sha512
+
+[PCRSignature:initrd]
+PCRPrivateKey=pcr-private-initrd-key.pem
+PCRPublicKey=pcr-public-initrd-key.pem
+Phases=enter-initrd
+
+[PCRSignature:system]
+PCRPrivateKey=pcr-private-system-key.pem
+PCRPublicKey=pcr-public-system-key.pem
+Phases=enter-initrd:leave-initrd
+ enter-initrd:leave-initrd:sysinit
+ enter-initrd:leave-initrd:sysinit:ready
+
+$ ukify -c ukify.conf build \
+ --linux=/lib/modules/6.0.9-300.fc37.x86_64/vmlinuz \
+ --initrd=/some/path/initramfs-6.0.9-300.fc37.x86_64.img
+ </programlisting>
+
+ <para>One "initrd" (<filename index='false'>early_cpio</filename>) is specified in the config file, and
+ the other initrd (<filename index='false'>initramfs-6.0.9-300.fc37.x86_64.img</filename>) is specified
+ on the command line. This may be useful for example when the first initrd contains microcode for the CPU
+ and does not need to be updated when the kernel version changes, unlike the actual initrd.</para>
+ </example>
+
+ <example>
+ <title>Kernel command line auxiliary PE</title>
+
+ <programlisting>ukify build \
+ --secureboot-private-key=sb.key \
+ --secureboot-certificate=sb.cert \
+ --cmdline='debug' \
+ --sbat='sbat,1,SBAT Version,sbat,1,https://github.com/rhboot/shim/blob/main/SBAT.md
+ uki.addon.author,1,UKI Addon for System,uki.addon.author,1,https://www.freedesktop.org/software/systemd/man/systemd-stub.html'
+ --output=debug.cmdline
+ </programlisting>
+
+ <para>This creates a signed PE binary that contains the additional kernel command line parameter
+ <literal>debug</literal> with SBAT metadata referring to the owner of the addon.</para>
+ </example>
+
+ <example>
+ <title>Decide signing policy and create certificate and keys</title>
+
+ <para>First, let's create an config file that specifies what signatures shall be made:</para>
+
+ <programlisting># cat >/etc/kernel/uki.conf &lt;&lt;EOF
+<xi:include href="uki.conf.example" parse="text" />EOF</programlisting>
+
+ <para>Next, we can generate the certificate and keys:</para>
+ <programlisting># ukify genkey --config=/etc/kernel/uki.conf
+Writing SecureBoot private key to /etc/kernel/secure-boot.key.pem
+Writing SecureBoot certificate to /etc/kernel/secure-boot.cert.pem
+Writing private key for PCR signing to /etc/kernel/pcr-initrd.key.pem
+Writing public key for PCR signing to /etc/kernel/pcr-initrd.pub.pem
+Writing private key for PCR signing to /etc/kernel/pcr-system.key.pem
+Writing public key for PCR signing to /etc/kernel/pcr-system.pub.pem
+</programlisting>
+
+ <para>(Both operations need to be done as root to allow write access
+ to <filename>/etc/kernel/</filename>.)</para>
+
+ <para>Subsequent invocations using the config file
+ (<command>ukify build --config=/etc/kernel/uki.conf</command>)
+ will use this certificate and key files. Note that the
+ <citerefentry><refentrytitle>kernel-install</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ plugin <filename>60-ukify.install</filename> uses <filename>/etc/kernel/uki.conf</filename>
+ by default, so after this file has been created, installations of kernels that create a UKI on the
+ local machine using <command>kernel-install</command> will perform signing using this config.</para>
+ </example>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-stub</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-boot</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-measure</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-pcrphase.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>
diff --git a/meson.build b/meson.build
index 5b2e7ca172..b874c2f9b4 100644
--- a/meson.build
+++ b/meson.build
@@ -1916,6 +1916,18 @@ subdir('src/boot/efi')
############################################################
+pymod = import('python')
+python = pymod.find_installation('python3', required : true, modules : ['jinja2'])
+python_39 = python.language_version().version_compare('>=3.9')
+
+want_ukify = get_option('ukify')
+if want_ukify and not python_39
+ error('ukify requires Python >= 3.9')
+endif
+conf.set10('ENABLE_UKIFY', want_ukify)
+
+############################################################
+
generate_gperfs = find_program('tools/generate-gperfs.py')
make_autosuspend_rules_py = find_program('tools/make-autosuspend-rules.py')
make_directive_index_py = find_program('tools/make-directive-index.py')
@@ -2164,6 +2176,7 @@ subdir('src/test')
subdir('src/fuzz')
subdir('rules.d')
subdir('test')
+subdir('src/ukify/test') # needs to be last for test_env variable
############################################################
@@ -3841,6 +3854,18 @@ exe = custom_target(
install_dir : bindir)
public_programs += exe
+ukify = custom_target(
+ 'ukify',
+ input : 'src/ukify/ukify.py',
+ output : 'ukify',
+ command : [jinja2_cmdline, '@INPUT@', '@OUTPUT@'],
+ install : want_ukify,
+ install_mode : 'rwxr-xr-x',
+ install_dir : rootlibexecdir)
+if want_ukify
+ public_programs += ukify
+endif
+
if want_tests != 'false' and want_kernel_install
test('test-kernel-install',
test_kernel_install_sh,
diff --git a/meson_options.txt b/meson_options.txt
index 814f340840..903e6681a4 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -499,6 +499,8 @@ option('llvm-fuzz', type : 'boolean', value : false,
description : 'build against LLVM libFuzzer')
option('kernel-install', type: 'boolean', value: true,
description : 'install kernel-install and associated files')
+option('ukify', type : 'boolean', value : false,
+ description : 'install ukify')
option('analyze', type: 'boolean', value: true,
description : 'install systemd-analyze')
diff --git a/src/ukify/test/example.signing.crt.base64 b/src/ukify/test/example.signing.crt.base64
new file mode 100644
index 0000000000..694d13b5a6
--- /dev/null
+++ b/src/ukify/test/example.signing.crt.base64
@@ -0,0 +1,23 @@
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diff --git a/src/ukify/test/example.signing.key.base64 b/src/ukify/test/example.signing.key.base64
new file mode 100644
index 0000000000..88baedbcb6
--- /dev/null
+++ b/src/ukify/test/example.signing.key.base64
@@ -0,0 +1,30 @@
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diff --git a/src/ukify/test/example.tpm2-pcr-private.pem.base64 b/src/ukify/test/example.tpm2-pcr-private.pem.base64
new file mode 100644
index 0000000000..586b28ef9b
--- /dev/null
+++ b/src/ukify/test/example.tpm2-pcr-private.pem.base64
@@ -0,0 +1,30 @@
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diff --git a/src/ukify/test/example.tpm2-pcr-private2.pem.base64 b/src/ukify/test/example.tpm2-pcr-private2.pem.base64
new file mode 100644
index 0000000000..d21a3d6043
--- /dev/null
+++ b/src/ukify/test/example.tpm2-pcr-private2.pem.base64
@@ -0,0 +1,30 @@
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diff --git a/src/ukify/test/example.tpm2-pcr-public.pem.base64 b/src/ukify/test/example.tpm2-pcr-public.pem.base64
new file mode 100644
index 0000000000..728a0f5362
--- /dev/null
+++ b/src/ukify/test/example.tpm2-pcr-public.pem.base64
@@ -0,0 +1,8 @@
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diff --git a/src/ukify/test/example.tpm2-pcr-public2.pem.base64 b/src/ukify/test/example.tpm2-pcr-public2.pem.base64
new file mode 100644
index 0000000000..44bb3ee9ac
--- /dev/null
+++ b/src/ukify/test/example.tpm2-pcr-public2.pem.base64
@@ -0,0 +1,8 @@
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diff --git a/src/ukify/test/meson.build b/src/ukify/test/meson.build
new file mode 100644
index 0000000000..5870ccc06c
--- /dev/null
+++ b/src/ukify/test/meson.build
@@ -0,0 +1,20 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
+if want_ukify and want_tests != 'false'
+ have_pytest_flakes = pymod.find_installation(
+ 'python3',
+ required : false,
+ modules : ['pytest_flakes'],
+ ).found()
+
+ args = ['-v']
+ if have_pytest_flakes
+ args += ['--flakes']
+ endif
+
+ test('test-ukify',
+ files('test_ukify.py'),
+ args: args,
+ env : test_env,
+ suite : 'ukify')
+endif
diff --git a/src/ukify/test/test_ukify.py b/src/ukify/test/test_ukify.py
new file mode 100755
index 0000000000..b12c09d4bf
--- /dev/null
+++ b/src/ukify/test/test_ukify.py
@@ -0,0 +1,848 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
+# pylint: disable=unused-import,import-outside-toplevel,useless-else-on-loop
+# pylint: disable=consider-using-with,wrong-import-position,unspecified-encoding
+# pylint: disable=protected-access,redefined-outer-name
+
+import base64
+import json
+import os
+import pathlib
+import re
+import shutil
+import subprocess
+import sys
+import tempfile
+import textwrap
+
+try:
+ import pytest
+except ImportError as e:
+ print(str(e), file=sys.stderr)
+ sys.exit(77)
+
+try:
+ # pyflakes: noqa
+ import pefile # noqa
+except ImportError as e:
+ print(str(e), file=sys.stderr)
+ sys.exit(77)
+
+# We import ukify.py, which is a template file. But only __version__ is
+# substituted, which we don't care about here. Having the .py suffix makes it
+# easier to import the file.
+sys.path.append(os.path.dirname(__file__) + '/..')
+import ukify
+
+build_root = os.getenv('PROJECT_BUILD_ROOT')
+arg_tools = ['--tools', build_root] if build_root else []
+
+def systemd_measure():
+ opts = ukify.create_parser().parse_args(arg_tools)
+ return ukify.find_tool('systemd-measure', opts=opts)
+
+def test_guess_efi_arch():
+ arch = ukify.guess_efi_arch()
+ assert arch in ukify.EFI_ARCHES
+
+def test_shell_join():
+ assert ukify.shell_join(['a', 'b', ' ']) == "a b ' '"
+
+def test_round_up():
+ assert ukify.round_up(0) == 0
+ assert ukify.round_up(4095) == 4096
+ assert ukify.round_up(4096) == 4096
+ assert ukify.round_up(4097) == 8192
+
+def test_namespace_creation():
+ ns = ukify.create_parser().parse_args(())
+ assert ns.linux is None
+ assert ns.initrd is None
+
+def test_config_example():
+ ex = ukify.config_example()
+ assert '[UKI]' in ex
+ assert 'Splash = BMP' in ex
+
+def test_apply_config(tmp_path):
+ config = tmp_path / 'config1.conf'
+ config.write_text(textwrap.dedent(
+ f'''
+ [UKI]
+ Linux = LINUX
+ Initrd = initrd1 initrd2
+ initrd3
+ Cmdline = 1 2 3 4 5
+ 6 7 8
+ OSRelease = @some/path1
+ DeviceTree = some/path2
+ Splash = some/path3
+ Uname = 1.2.3
+ EFIArch=arm
+ Stub = some/path4
+ PCRBanks = sha512,sha1
+ SigningEngine = engine1
+ SecureBootPrivateKey = some/path5
+ SecureBootCertificate = some/path6
+ SignKernel = no
+
+ [PCRSignature:NAME]
+ PCRPrivateKey = some/path7
+ PCRPublicKey = some/path8
+ Phases = {':'.join(ukify.KNOWN_PHASES)}
+ '''))
+
+ ns = ukify.create_parser().parse_args(['build'])
+ ns.linux = None
+ ns.initrd = []
+ ukify.apply_config(ns, config)
+
+ assert ns.linux == pathlib.Path('LINUX')
+ assert ns.initrd == [pathlib.Path('initrd1'),
+ pathlib.Path('initrd2'),
+ pathlib.Path('initrd3')]
+ assert ns.cmdline == '1 2 3 4 5\n6 7 8'
+ assert ns.os_release == '@some/path1'
+ assert ns.devicetree == pathlib.Path('some/path2')
+ assert ns.splash == pathlib.Path('some/path3')
+ assert ns.efi_arch == 'arm'
+ assert ns.stub == pathlib.Path('some/path4')
+ assert ns.pcr_banks == ['sha512', 'sha1']
+ assert ns.signing_engine == 'engine1'
+ assert ns.sb_key == 'some/path5'
+ assert ns.sb_cert == 'some/path6'
+ assert ns.sign_kernel is False
+
+ assert ns._groups == ['NAME']
+ assert ns.pcr_private_keys == [pathlib.Path('some/path7')]
+ assert ns.pcr_public_keys == [pathlib.Path('some/path8')]
+ assert ns.phase_path_groups == [['enter-initrd:leave-initrd:sysinit:ready:shutdown:final']]
+
+ ukify.finalize_options(ns)
+
+ assert ns.linux == pathlib.Path('LINUX')
+ assert ns.initrd == [pathlib.Path('initrd1'),
+ pathlib.Path('initrd2'),
+ pathlib.Path('initrd3')]
+ assert ns.cmdline == '1 2 3 4 5 6 7 8'
+ assert ns.os_release == pathlib.Path('some/path1')
+ assert ns.devicetree == pathlib.Path('some/path2')
+ assert ns.splash == pathlib.Path('some/path3')
+ assert ns.efi_arch == 'arm'
+ assert ns.stub == pathlib.Path('some/path4')
+ assert ns.pcr_banks == ['sha512', 'sha1']
+ assert ns.signing_engine == 'engine1'
+ assert ns.sb_key == 'some/path5'
+ assert ns.sb_cert == 'some/path6'
+ assert ns.sign_kernel is False
+
+ assert ns._groups == ['NAME']
+ assert ns.pcr_private_keys == [pathlib.Path('some/path7')]
+ assert ns.pcr_public_keys == [pathlib.Path('some/path8')]
+ assert ns.phase_path_groups == [['enter-initrd:leave-initrd:sysinit:ready:shutdown:final']]
+
+def test_parse_args_minimal():
+ with pytest.raises(ValueError):
+ ukify.parse_args([])
+
+ opts = ukify.parse_args('arg1 arg2'.split())
+ assert opts.linux == pathlib.Path('arg1')
+ assert opts.initrd == [pathlib.Path('arg2')]
+ assert opts.os_release in (pathlib.Path('/etc/os-release'),
+ pathlib.Path('/usr/lib/os-release'))
+
+def test_parse_args_many_deprecated():
+ opts = ukify.parse_args(
+ ['/ARG1', '///ARG2', '/ARG3 WITH SPACE',
+ '--cmdline=a b c',
+ '--os-release=K1=V1\nK2=V2',
+ '--devicetree=DDDDTTTT',
+ '--splash=splash',
+ '--pcrpkey=PATH',
+ '--uname=1.2.3',
+ '--stub=STUBPATH',
+ '--pcr-private-key=PKEY1',
+ '--pcr-public-key=PKEY2',
+ '--pcr-banks=SHA1,SHA256',
+ '--signing-engine=ENGINE',
+ '--secureboot-private-key=SBKEY',
+ '--secureboot-certificate=SBCERT',
+ '--sign-kernel',
+ '--no-sign-kernel',
+ '--tools=TOOLZ///',
+ '--output=OUTPUT',
+ '--measure',
+ '--no-measure',
+ ])
+ assert opts.linux == pathlib.Path('/ARG1')
+ assert opts.initrd == [pathlib.Path('/ARG2'), pathlib.Path('/ARG3 WITH SPACE')]
+ assert opts.cmdline == 'a b c'
+ assert opts.os_release == 'K1=V1\nK2=V2'
+ assert opts.devicetree == pathlib.Path('DDDDTTTT')
+ assert opts.splash == pathlib.Path('splash')
+ assert opts.pcrpkey == pathlib.Path('PATH')
+ assert opts.uname == '1.2.3'
+ assert opts.stub == pathlib.Path('STUBPATH')
+ assert opts.pcr_private_keys == [pathlib.Path('PKEY1')]
+ assert opts.pcr_public_keys == [pathlib.Path('PKEY2')]
+ assert opts.pcr_banks == ['SHA1', 'SHA256']
+ assert opts.signing_engine == 'ENGINE'
+ assert opts.sb_key == 'SBKEY'
+ assert opts.sb_cert == 'SBCERT'
+ assert opts.sign_kernel is False
+ assert opts.tools == [pathlib.Path('TOOLZ/')]
+ assert opts.output == pathlib.Path('OUTPUT')
+ assert opts.measure is False
+
+def test_parse_args_many():
+ opts = ukify.parse_args(
+ ['build',
+ '--linux=/ARG1',
+ '--initrd=///ARG2',
+ '--initrd=/ARG3 WITH SPACE',
+ '--cmdline=a b c',
+ '--os-release=K1=V1\nK2=V2',
+ '--devicetree=DDDDTTTT',
+ '--splash=splash',
+ '--pcrpkey=PATH',
+ '--uname=1.2.3',
+ '--stub=STUBPATH',
+ '--pcr-private-key=PKEY1',
+ '--pcr-public-key=PKEY2',
+ '--pcr-banks=SHA1,SHA256',
+ '--signing-engine=ENGINE',
+ '--secureboot-private-key=SBKEY',
+ '--secureboot-certificate=SBCERT',
+ '--sign-kernel',
+ '--no-sign-kernel',
+ '--tools=TOOLZ///',
+ '--output=OUTPUT',
+ '--measure',
+ '--no-measure',
+ ])
+ assert opts.linux == pathlib.Path('/ARG1')
+ assert opts.initrd == [pathlib.Path('/ARG2'), pathlib.Path('/ARG3 WITH SPACE')]
+ assert opts.cmdline == 'a b c'
+ assert opts.os_release == 'K1=V1\nK2=V2'
+ assert opts.devicetree == pathlib.Path('DDDDTTTT')
+ assert opts.splash == pathlib.Path('splash')
+ assert opts.pcrpkey == pathlib.Path('PATH')
+ assert opts.uname == '1.2.3'
+ assert opts.stub == pathlib.Path('STUBPATH')
+ assert opts.pcr_private_keys == [pathlib.Path('PKEY1')]
+ assert opts.pcr_public_keys == [pathlib.Path('PKEY2')]
+ assert opts.pcr_banks == ['SHA1', 'SHA256']
+ assert opts.signing_engine == 'ENGINE'
+ assert opts.sb_key == 'SBKEY'
+ assert opts.sb_cert == 'SBCERT'
+ assert opts.sign_kernel is False
+ assert opts.tools == [pathlib.Path('TOOLZ/')]
+ assert opts.output == pathlib.Path('OUTPUT')
+ assert opts.measure is False
+
+def test_parse_sections():
+ opts = ukify.parse_args(
+ ['build',
+ '--linux=/ARG1',
+ '--initrd=/ARG2',
+ '--section=test:TESTTESTTEST',
+ '--section=test2:@FILE',
+ ])
+
+ assert opts.linux == pathlib.Path('/ARG1')
+ assert opts.initrd == [pathlib.Path('/ARG2')]
+ assert len(opts.sections) == 2
+
+ assert opts.sections[0].name == 'test'
+ assert isinstance(opts.sections[0].content, pathlib.Path)
+ assert opts.sections[0].tmpfile
+ assert opts.sections[0].measure is False
+
+ assert opts.sections[1].name == 'test2'
+ assert opts.sections[1].content == pathlib.Path('FILE')
+ assert opts.sections[1].tmpfile is None
+ assert opts.sections[1].measure is False
+
+def test_config_priority(tmp_path):
+ config = tmp_path / 'config1.conf'
+ # config: use pesign and give certdir + certname
+ config.write_text(textwrap.dedent(
+ f'''
+ [UKI]
+ Linux = LINUX
+ Initrd = initrd1 initrd2
+ initrd3
+ Cmdline = 1 2 3 4 5
+ 6 7 8
+ OSRelease = @some/path1
+ DeviceTree = some/path2
+ Splash = some/path3
+ Uname = 1.2.3
+ EFIArch = arm
+ Stub = some/path4
+ PCRBanks = sha512,sha1
+ SigningEngine = engine1
+ SecureBootSigningTool = pesign
+ SecureBootCertificateDir = some/path5
+ SecureBootCertificateName = some/name1
+ SignKernel = no
+
+ [PCRSignature:NAME]
+ PCRPrivateKey = some/path7
+ PCRPublicKey = some/path8
+ Phases = {':'.join(ukify.KNOWN_PHASES)}
+ '''))
+
+ # args: use sbsign and give key + cert, should override pesign
+ opts = ukify.parse_args(
+ ['build',
+ '--linux=/ARG1',
+ '--initrd=///ARG2',
+ '--initrd=/ARG3 WITH SPACE',
+ '--cmdline= a b c ',
+ '--os-release=K1=V1\nK2=V2',
+ '--devicetree=DDDDTTTT',
+ '--splash=splash',
+ '--pcrpkey=PATH',
+ '--uname=1.2.3',
+ '--stub=STUBPATH',
+ '--pcr-private-key=PKEY1',
+ '--pcr-public-key=PKEY2',
+ '--pcr-banks=SHA1,SHA256',
+ '--signing-engine=ENGINE',
+ '--signtool=sbsign',
+ '--secureboot-private-key=SBKEY',
+ '--secureboot-certificate=SBCERT',
+ '--sign-kernel',
+ '--no-sign-kernel',
+ '--tools=TOOLZ///',
+ '--output=OUTPUT',
+ '--measure',
+ ])
+
+ ukify.apply_config(opts, config)
+ ukify.finalize_options(opts)
+
+ assert opts.linux == pathlib.Path('/ARG1')
+ assert opts.initrd == [pathlib.Path('initrd1'),
+ pathlib.Path('initrd2'),
+ pathlib.Path('initrd3'),
+ pathlib.Path('/ARG2'),
+ pathlib.Path('/ARG3 WITH SPACE')]
+ assert opts.cmdline == 'a b c'
+ assert opts.os_release == 'K1=V1\nK2=V2'
+ assert opts.devicetree == pathlib.Path('DDDDTTTT')
+ assert opts.splash == pathlib.Path('splash')
+ assert opts.pcrpkey == pathlib.Path('PATH')
+ assert opts.uname == '1.2.3'
+ assert opts.stub == pathlib.Path('STUBPATH')
+ assert opts.pcr_private_keys == [pathlib.Path('PKEY1'),
+ pathlib.Path('some/path7')]
+ assert opts.pcr_public_keys == [pathlib.Path('PKEY2'),
+ pathlib.Path('some/path8')]
+ assert opts.pcr_banks == ['SHA1', 'SHA256']
+ assert opts.signing_engine == 'ENGINE'
+ assert opts.signtool == 'sbsign' # from args
+ assert opts.sb_key == 'SBKEY' # from args
+ assert opts.sb_cert == 'SBCERT' # from args
+ assert opts.sb_certdir == 'some/path5' # from config
+ assert opts.sb_cert_name == 'some/name1' # from config
+ assert opts.sign_kernel is False
+ assert opts.tools == [pathlib.Path('TOOLZ/')]
+ assert opts.output == pathlib.Path('OUTPUT')
+ assert opts.measure is True
+
+def test_help(capsys):
+ with pytest.raises(SystemExit):
+ ukify.parse_args(['--help'])
+ out = capsys.readouterr()
+ assert '--section' in out.out
+ assert not out.err
+
+def test_help_display(capsys):
+ with pytest.raises(SystemExit):
+ ukify.parse_args(['inspect', '--help'])
+ out = capsys.readouterr()
+ assert '--section' in out.out
+ assert not out.err
+
+def test_help_error_deprecated(capsys):
+ with pytest.raises(SystemExit):
+ ukify.parse_args(['a', 'b', '--no-such-option'])
+ out = capsys.readouterr()
+ assert not out.out
+ assert '--no-such-option' in out.err
+ assert len(out.err.splitlines()) == 1
+
+def test_help_error(capsys):
+ with pytest.raises(SystemExit):
+ ukify.parse_args(['build', '--no-such-option'])
+ out = capsys.readouterr()
+ assert not out.out
+ assert '--no-such-option' in out.err
+ assert len(out.err.splitlines()) == 1
+
+@pytest.fixture(scope='session')
+def kernel_initrd():
+ opts = ukify.create_parser().parse_args(arg_tools)
+ bootctl = ukify.find_tool('bootctl', opts=opts)
+ if bootctl is None:
+ return None
+
+ try:
+ text = subprocess.check_output([bootctl, 'list', '--json=short'],
+ text=True)
+ except subprocess.CalledProcessError:
+ return None
+
+ items = json.loads(text)
+
+ for item in items:
+ try:
+ linux = f"{item['root']}{item['linux']}"
+ initrd = f"{item['root']}{item['initrd'][0].split(' ')[0]}"
+ except (KeyError, IndexError):
+ continue
+ return ['--linux', linux, '--initrd', initrd]
+ else:
+ return None
+
+def test_check_splash():
+ try:
+ # pyflakes: noqa
+ import PIL # noqa
+ except ImportError:
+ pytest.skip('PIL not available')
+
+ with pytest.raises(OSError):
+ ukify.check_splash(os.devnull)
+
+def test_basic_operation(kernel_initrd, tmpdir):
+ if kernel_initrd is None:
+ pytest.skip('linux+initrd not found')
+
+ output = f'{tmpdir}/basic.efi'
+ opts = ukify.parse_args([
+ 'build',
+ *kernel_initrd,
+ f'--output={output}',
+ ])
+ try:
+ ukify.check_inputs(opts)
+ except OSError as e:
+ pytest.skip(str(e))
+
+ ukify.make_uki(opts)
+
+ # let's check that objdump likes the resulting file
+ subprocess.check_output(['objdump', '-h', output])
+
+def test_sections(kernel_initrd, tmpdir):
+ if kernel_initrd is None:
+ pytest.skip('linux+initrd not found')
+
+ output = f'{tmpdir}/basic.efi'
+ opts = ukify.parse_args([
+ 'build',
+ *kernel_initrd,
+ f'--output={output}',
+ '--uname=1.2.3',
+ '--cmdline=ARG1 ARG2 ARG3',
+ '--os-release=K1=V1\nK2=V2\n',
+ '--section=.test:CONTENTZ',
+ ])
+
+ try:
+ ukify.check_inputs(opts)
+ except OSError as e:
+ pytest.skip(str(e))
+
+ ukify.make_uki(opts)
+
+ # let's check that objdump likes the resulting file
+ dump = subprocess.check_output(['objdump', '-h', output], text=True)
+
+ for sect in 'text osrel cmdline linux initrd uname test'.split():
+ assert re.search(fr'^\s*\d+\s+.{sect}\s+0', dump, re.MULTILINE)
+
+def test_addon(tmpdir):
+ output = f'{tmpdir}/addon.efi'
+ args = [
+ 'build',
+ f'--output={output}',
+ '--cmdline=ARG1 ARG2 ARG3',
+ """--sbat=sbat,1,foo
+foo,1
+bar,2
+""",
+ '--section=.test:CONTENTZ',
+ """--sbat=sbat,1,foo
+baz,3
+"""
+ ]
+ if stub := os.getenv('EFI_ADDON'):
+ args += [f'--stub={stub}']
+ expected_exceptions = ()
+ else:
+ expected_exceptions = (FileNotFoundError,)
+
+ opts = ukify.parse_args(args)
+ try:
+ ukify.check_inputs(opts)
+ except expected_exceptions as e:
+ pytest.skip(str(e))
+
+ ukify.make_uki(opts)
+
+ # let's check that objdump likes the resulting file
+ dump = subprocess.check_output(['objdump', '-h', output], text=True)
+
+ for sect in 'text cmdline test sbat'.split():
+ assert re.search(fr'^\s*\d+\s+.{sect}\s+0', dump, re.MULTILINE)
+
+ pe = pefile.PE(output, fast_load=True)
+ found = False
+
+ for section in pe.sections:
+ if section.Name.rstrip(b"\x00").decode() == ".sbat":
+ assert found is False
+ split = section.get_data().rstrip(b"\x00").decode().splitlines()
+ assert split == ["sbat,1,SBAT Version,sbat,1,https://github.com/rhboot/shim/blob/main/SBAT.md", "foo,1", "bar,2", "baz,3"]
+ found = True
+
+ assert found is True
+
+
+def unbase64(filename):
+ tmp = tempfile.NamedTemporaryFile()
+ base64.decode(filename.open('rb'), tmp)
+ tmp.flush()
+ return tmp
+
+
+def test_uname_scraping(kernel_initrd):
+ if kernel_initrd is None:
+ pytest.skip('linux+initrd not found')
+
+ assert kernel_initrd[0] == '--linux'
+ uname = ukify.Uname.scrape(kernel_initrd[1])
+ assert re.match(r'\d+\.\d+\.\d+', uname)
+
+def test_efi_signing_sbsign(kernel_initrd, tmpdir):
+ if kernel_initrd is None:
+ pytest.skip('linux+initrd not found')
+ if not shutil.which('sbsign'):
+ pytest.skip('sbsign not found')
+
+ ourdir = pathlib.Path(__file__).parent
+ cert = unbase64(ourdir / 'example.signing.crt.base64')
+ key = unbase64(ourdir / 'example.signing.key.base64')
+
+ output = f'{tmpdir}/signed.efi'
+ opts = ukify.parse_args([
+ 'build',
+ *kernel_initrd,
+ f'--output={output}',
+ '--uname=1.2.3',
+ '--cmdline=ARG1 ARG2 ARG3',
+ f'--secureboot-certificate={cert.name}',
+ f'--secureboot-private-key={key.name}',
+ ])
+
+ try:
+ ukify.check_inputs(opts)
+ except OSError as e:
+ pytest.skip(str(e))
+
+ ukify.make_uki(opts)
+
+ if shutil.which('sbverify'):
+ # let's check that sbverify likes the resulting file
+ dump = subprocess.check_output([
+ 'sbverify',
+ '--cert', cert.name,
+ output,
+ ], text=True)
+
+ assert 'Signature verification OK' in dump
+
+def test_efi_signing_pesign(kernel_initrd, tmpdir):
+ if kernel_initrd is None:
+ pytest.skip('linux+initrd not found')
+ if not shutil.which('pesign'):
+ pytest.skip('pesign not found')
+
+ nss_db = f'{tmpdir}/nss_db'
+ name = 'Test_Secureboot'
+ author = 'systemd'
+
+ subprocess.check_call(['mkdir', '-p', nss_db])
+ cmd = f'certutil -N --empty-password -d {nss_db}'.split(' ')
+ subprocess.check_call(cmd)
+ cmd = f'efikeygen -d {nss_db} -S -k -c CN={author} -n {name}'.split(' ')
+ subprocess.check_call(cmd)
+
+ output = f'{tmpdir}/signed.efi'
+ opts = ukify.parse_args([
+ 'build',
+ *kernel_initrd,
+ f'--output={output}',
+ '--uname=1.2.3',
+ '--signtool=pesign',
+ '--cmdline=ARG1 ARG2 ARG3',
+ f'--secureboot-certificate-name={name}',
+ f'--secureboot-certificate-dir={nss_db}',
+ ])
+
+ try:
+ ukify.check_inputs(opts)
+ except OSError as e:
+ pytest.skip(str(e))
+
+ ukify.make_uki(opts)
+
+ # let's check that sbverify likes the resulting file
+ dump = subprocess.check_output([
+ 'pesign', '-S',
+ '-i', output,
+ ], text=True)
+
+ assert f"The signer's common name is {author}" in dump
+
+def test_inspect(kernel_initrd, tmpdir, capsys):
+ if kernel_initrd is None:
+ pytest.skip('linux+initrd not found')
+ if not shutil.which('sbsign'):
+ pytest.skip('sbsign not found')
+
+ ourdir = pathlib.Path(__file__).parent
+ cert = unbase64(ourdir / 'example.signing.crt.base64')
+ key = unbase64(ourdir / 'example.signing.key.base64')
+
+ output = f'{tmpdir}/signed2.efi'
+ uname_arg='1.2.3'
+ osrel_arg='Linux'
+ cmdline_arg='ARG1 ARG2 ARG3'
+ opts = ukify.parse_args([
+ 'build',
+ *kernel_initrd,
+ f'--cmdline={cmdline_arg}',
+ f'--os-release={osrel_arg}',
+ f'--uname={uname_arg}',
+ f'--output={output}',
+ f'--secureboot-certificate={cert.name}',
+ f'--secureboot-private-key={key.name}',
+ ])
+
+ ukify.check_inputs(opts)
+ ukify.make_uki(opts)
+
+ opts = ukify.parse_args(['inspect', output])
+ ukify.inspect_sections(opts)
+
+ text = capsys.readouterr().out
+
+ expected_osrel = f'.osrel:\n size: {len(osrel_arg)}'
+ assert expected_osrel in text
+ expected_cmdline = f'.cmdline:\n size: {len(cmdline_arg)}'
+ assert expected_cmdline in text
+ expected_uname = f'.uname:\n size: {len(uname_arg)}'
+ assert expected_uname in text
+
+ expected_initrd = '.initrd:\n size:'
+ assert expected_initrd in text
+ expected_linux = '.linux:\n size:'
+ assert expected_linux in text
+
+
+def test_pcr_signing(kernel_initrd, tmpdir):
+ if kernel_initrd is None:
+ pytest.skip('linux+initrd not found')
+ if systemd_measure() is None:
+ pytest.skip('systemd-measure not found')
+
+ ourdir = pathlib.Path(__file__).parent
+ pub = unbase64(ourdir / 'example.tpm2-pcr-public.pem.base64')
+ priv = unbase64(ourdir / 'example.tpm2-pcr-private.pem.base64')
+
+ output = f'{tmpdir}/signed.efi'
+ args = [
+ 'build',
+ *kernel_initrd,
+ f'--output={output}',
+ '--uname=1.2.3',
+ '--cmdline=ARG1 ARG2 ARG3',
+ '--os-release=ID=foobar\n',
+ '--pcr-banks=sha1', # use sha1 because it doesn't really matter
+ f'--pcr-private-key={priv.name}',
+ ] + arg_tools
+
+ # If the public key is not explicitly specified, it is derived automatically. Let's make sure everything
+ # works as expected both when the public keys is specified explicitly and when it is derived from the
+ # private key.
+ for extra in ([f'--pcrpkey={pub.name}', f'--pcr-public-key={pub.name}'], []):
+ opts = ukify.parse_args(args + extra)
+ try:
+ ukify.check_inputs(opts)
+ except OSError as e:
+ pytest.skip(str(e))
+
+ ukify.make_uki(opts)
+
+ # let's check that objdump likes the resulting file
+ dump = subprocess.check_output(['objdump', '-h', output], text=True)
+
+ for sect in 'text osrel cmdline linux initrd uname pcrsig'.split():
+ assert re.search(fr'^\s*\d+\s+.{sect}\s+0', dump, re.MULTILINE)
+
+ # objcopy fails when called without an output argument (EPERM).
+ # It also fails when called with /dev/null (file truncated).
+ # It also fails when called with /dev/zero (because it reads the
+ # output file, infinitely in this case.)
+ # So let's just call it with a dummy output argument.
+ subprocess.check_call([
+ 'objcopy',
+ *(f'--dump-section=.{n}={tmpdir}/out.{n}' for n in (
+ 'pcrpkey', 'pcrsig', 'osrel', 'uname', 'cmdline')),
+ output,
+ tmpdir / 'dummy',
+ ],
+ text=True)
+
+ assert open(tmpdir / 'out.pcrpkey').read() == open(pub.name).read()
+ assert open(tmpdir / 'out.osrel').read() == 'ID=foobar\n'
+ assert open(tmpdir / 'out.uname').read() == '1.2.3'
+ assert open(tmpdir / 'out.cmdline').read() == 'ARG1 ARG2 ARG3'
+ sig = open(tmpdir / 'out.pcrsig').read()
+ sig = json.loads(sig)
+ assert list(sig.keys()) == ['sha1']
+ assert len(sig['sha1']) == 4 # four items for four phases
+
+def test_pcr_signing2(kernel_initrd, tmpdir):
+ if kernel_initrd is None:
+ pytest.skip('linux+initrd not found')
+ if systemd_measure() is None:
+ pytest.skip('systemd-measure not found')
+
+ ourdir = pathlib.Path(__file__).parent
+ pub = unbase64(ourdir / 'example.tpm2-pcr-public.pem.base64')
+ priv = unbase64(ourdir / 'example.tpm2-pcr-private.pem.base64')
+ pub2 = unbase64(ourdir / 'example.tpm2-pcr-public2.pem.base64')
+ priv2 = unbase64(ourdir / 'example.tpm2-pcr-private2.pem.base64')
+
+ # simulate a microcode file
+ with open(f'{tmpdir}/microcode', 'wb') as microcode:
+ microcode.write(b'1234567890')
+
+ output = f'{tmpdir}/signed.efi'
+ assert kernel_initrd[0] == '--linux'
+ opts = ukify.parse_args([
+ 'build',
+ *kernel_initrd[:2],
+ f'--initrd={microcode.name}',
+ *kernel_initrd[2:],
+ f'--output={output}',
+ '--uname=1.2.3',
+ '--cmdline=ARG1 ARG2 ARG3',
+ '--os-release=ID=foobar\n',
+ '--pcr-banks=sha1',
+ f'--pcrpkey={pub2.name}',
+ f'--pcr-public-key={pub.name}',
+ f'--pcr-private-key={priv.name}',
+ '--phases=enter-initrd enter-initrd:leave-initrd',
+ f'--pcr-public-key={pub2.name}',
+ f'--pcr-private-key={priv2.name}',
+ '--phases=sysinit ready shutdown final', # yes, those phase paths are not reachable
+ ] + arg_tools)
+
+ try:
+ ukify.check_inputs(opts)
+ except OSError as e:
+ pytest.skip(str(e))
+
+ ukify.make_uki(opts)
+
+ # let's check that objdump likes the resulting file
+ dump = subprocess.check_output(['objdump', '-h', output], text=True)
+
+ for sect in 'text osrel cmdline linux initrd uname pcrsig'.split():
+ assert re.search(fr'^\s*\d+\s+.{sect}\s+0', dump, re.MULTILINE)
+
+ subprocess.check_call([
+ 'objcopy',
+ *(f'--dump-section=.{n}={tmpdir}/out.{n}' for n in (
+ 'pcrpkey', 'pcrsig', 'osrel', 'uname', 'cmdline', 'initrd')),
+ output,
+ tmpdir / 'dummy',
+ ],
+ text=True)
+
+ assert open(tmpdir / 'out.pcrpkey').read() == open(pub2.name).read()
+ assert open(tmpdir / 'out.osrel').read() == 'ID=foobar\n'
+ assert open(tmpdir / 'out.uname').read() == '1.2.3'
+ assert open(tmpdir / 'out.cmdline').read() == 'ARG1 ARG2 ARG3'
+ assert open(tmpdir / 'out.initrd', 'rb').read(10) == b'1234567890'
+
+ sig = open(tmpdir / 'out.pcrsig').read()
+ sig = json.loads(sig)
+ assert list(sig.keys()) == ['sha1']
+ assert len(sig['sha1']) == 6 # six items for six phases paths
+
+def test_key_cert_generation(tmpdir):
+ opts = ukify.parse_args([
+ 'genkey',
+ f"--pcr-public-key={tmpdir / 'pcr1.pub.pem'}",
+ f"--pcr-private-key={tmpdir / 'pcr1.priv.pem'}",
+ '--phases=enter-initrd enter-initrd:leave-initrd',
+ f"--pcr-public-key={tmpdir / 'pcr2.pub.pem'}",
+ f"--pcr-private-key={tmpdir / 'pcr2.priv.pem'}",
+ '--phases=sysinit ready',
+ f"--secureboot-private-key={tmpdir / 'sb.priv.pem'}",
+ f"--secureboot-certificate={tmpdir / 'sb.cert.pem'}",
+ ])
+ assert opts.verb == 'genkey'
+ ukify.check_cert_and_keys_nonexistent(opts)
+
+ pytest.importorskip('cryptography')
+
+ ukify.generate_keys(opts)
+
+ if not shutil.which('openssl'):
+ return
+
+ for key in (tmpdir / 'pcr1.priv.pem',
+ tmpdir / 'pcr2.priv.pem',
+ tmpdir / 'sb.priv.pem'):
+ out = subprocess.check_output([
+ 'openssl', 'rsa',
+ '-in', key,
+ '-text',
+ '-noout',
+ ], text = True)
+ assert 'Private-Key' in out
+ assert '2048 bit' in out
+
+ for pub in (tmpdir / 'pcr1.pub.pem',
+ tmpdir / 'pcr2.pub.pem'):
+ out = subprocess.check_output([
+ 'openssl', 'rsa',
+ '-pubin',
+ '-in', pub,
+ '-text',
+ '-noout',
+ ], text = True)
+ assert 'Public-Key' in out
+ assert '2048 bit' in out
+
+ out = subprocess.check_output([
+ 'openssl', 'x509',
+ '-in', tmpdir / 'sb.cert.pem',
+ '-text',
+ '-noout',
+ ], text = True)
+ assert 'Certificate' in out
+ assert 'Issuer: CN = SecureBoot signing key on host' in out
+
+if __name__ == '__main__':
+ sys.exit(pytest.main(sys.argv))
diff --git a/src/ukify/ukify.py b/src/ukify/ukify.py
new file mode 100755
index 0000000000..08f505a271
--- /dev/null
+++ b/src/ukify/ukify.py
@@ -0,0 +1,1660 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: LGPL-2.1-or-later
+#
+# This file is part of systemd.
+#
+# systemd is free software; you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation; either version 2.1 of the License, or
+# (at your option) any later version.
+#
+# systemd is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with systemd; If not, see <https://www.gnu.org/licenses/>.
+
+# pylint: disable=import-outside-toplevel,consider-using-with,unused-argument
+# pylint: disable=unnecessary-lambda-assignment
+
+import argparse
+import configparser
+import contextlib
+import collections
+import dataclasses
+import datetime
+import fnmatch
+import itertools
+import json
+import os
+import pathlib
+import pprint
+import pydoc
+import re
+import shlex
+import shutil
+import socket
+import subprocess
+import sys
+import tempfile
+import textwrap
+from hashlib import sha256
+from typing import (Any,
+ Callable,
+ IO,
+ Optional,
+ Sequence,
+ Union)
+
+import pefile # type: ignore
+
+__version__ = '{{PROJECT_VERSION}} ({{GIT_VERSION}})'
+
+EFI_ARCH_MAP = {
+ # host_arch glob : [efi_arch, 32_bit_efi_arch if mixed mode is supported]
+ 'x86_64' : ['x64', 'ia32'],
+ 'i[3456]86' : ['ia32'],
+ 'aarch64' : ['aa64'],
+ 'armv[45678]*l': ['arm'],
+ 'loongarch32' : ['loongarch32'],
+ 'loongarch64' : ['loongarch64'],
+ 'riscv32' : ['riscv32'],
+ 'riscv64' : ['riscv64'],
+}
+EFI_ARCHES: list[str] = sum(EFI_ARCH_MAP.values(), [])
+
+# Default configuration directories and file name.
+# When the user does not specify one, the directories are searched in this order and the first file found is used.
+DEFAULT_CONFIG_DIRS = ['/run/systemd', '/etc/systemd', '/usr/local/lib/systemd', '/usr/lib/systemd']
+DEFAULT_CONFIG_FILE = 'ukify.conf'
+
+class Style:
+ bold = "\033[0;1;39m" if sys.stderr.isatty() else ""
+ gray = "\033[0;38;5;245m" if sys.stderr.isatty() else ""
+ red = "\033[31;1m" if sys.stderr.isatty() else ""
+ yellow = "\033[33;1m" if sys.stderr.isatty() else ""
+ reset = "\033[0m" if sys.stderr.isatty() else ""
+
+
+def guess_efi_arch():
+ arch = os.uname().machine
+
+ for glob, mapping in EFI_ARCH_MAP.items():
+ if fnmatch.fnmatch(arch, glob):
+ efi_arch, *fallback = mapping
+ break
+ else:
+ raise ValueError(f'Unsupported architecture {arch}')
+
+ # This makes sense only on some architectures, but it also probably doesn't
+ # hurt on others, so let's just apply the check everywhere.
+ if fallback:
+ fw_platform_size = pathlib.Path('/sys/firmware/efi/fw_platform_size')
+ try:
+ size = fw_platform_size.read_text().strip()
+ except FileNotFoundError:
+ pass
+ else:
+ if int(size) == 32:
+ efi_arch = fallback[0]
+
+ # print(f'Host arch {arch!r}, EFI arch {efi_arch!r}')
+ return efi_arch
+
+
+def page(text: str, enabled: Optional[bool]) -> None:
+ if enabled:
+ # Initialize less options from $SYSTEMD_LESS or provide a suitable fallback.
+ os.environ['LESS'] = os.getenv('SYSTEMD_LESS', 'FRSXMK')
+ pydoc.pager(text)
+ else:
+ print(text)
+
+
+def shell_join(cmd):
+ # TODO: drop in favour of shlex.join once shlex.join supports pathlib.Path.
+ return ' '.join(shlex.quote(str(x)) for x in cmd)
+
+
+def round_up(x, blocksize=4096):
+ return (x + blocksize - 1) // blocksize * blocksize
+
+
+def try_import(modname, name=None):
+ try:
+ return __import__(modname)
+ except ImportError as e:
+ raise ValueError(f'Kernel is compressed with {name or modname}, but module unavailable') from e
+
+
+def maybe_decompress(filename):
+ """Decompress file if compressed. Return contents."""
+ f = open(filename, 'rb')
+ start = f.read(4)
+ f.seek(0)
+
+ if start.startswith(b'\x7fELF'):
+ # not compressed
+ return f.read()
+
+ if start.startswith(b'MZ'):
+ # not compressed aarch64 and riscv64
+ return f.read()
+
+ if start.startswith(b'\x1f\x8b'):
+ gzip = try_import('gzip')
+ return gzip.open(f).read()
+
+ if start.startswith(b'\x28\xb5\x2f\xfd'):
+ zstd = try_import('zstd')
+ return zstd.uncompress(f.read())
+
+ if start.startswith(b'\x02\x21\x4c\x18'):
+ lz4 = try_import('lz4.frame', 'lz4')
+ return lz4.frame.decompress(f.read())
+
+ if start.startswith(b'\x04\x22\x4d\x18'):
+ print('Newer lz4 stream format detected! This may not boot!')
+ lz4 = try_import('lz4.frame', 'lz4')
+ return lz4.frame.decompress(f.read())
+
+ if start.startswith(b'\x89LZO'):
+ # python3-lzo is not packaged for Fedora
+ raise NotImplementedError('lzo decompression not implemented')
+
+ if start.startswith(b'BZh'):
+ bz2 = try_import('bz2', 'bzip2')
+ return bz2.open(f).read()
+
+ if start.startswith(b'\x5d\x00\x00'):
+ lzma = try_import('lzma')
+ return lzma.open(f).read()
+
+ raise NotImplementedError(f'unknown file format (starts with {start})')
+
+
+class Uname:
+ # This class is here purely as a namespace for the functions
+
+ VERSION_PATTERN = r'(?P<version>[a-z0-9._-]+) \([^ )]+\) (?:#.*)'
+
+ NOTES_PATTERN = r'^\s+Linux\s+0x[0-9a-f]+\s+OPEN\n\s+description data: (?P<version>[0-9a-f ]+)\s*$'
+
+ # Linux version 6.0.8-300.fc37.ppc64le (mockbuild@buildvm-ppc64le-03.iad2.fedoraproject.org)
+ # (gcc (GCC) 12.2.1 20220819 (Red Hat 12.2.1-2), GNU ld version 2.38-24.fc37)
+ # #1 SMP Fri Nov 11 14:39:11 UTC 2022
+ TEXT_PATTERN = rb'Linux version (?P<version>\d\.\S+) \('
+
+ @classmethod
+ def scrape_x86(cls, filename, opts=None):
+ # Based on https://gitlab.archlinux.org/archlinux/mkinitcpio/mkinitcpio/-/blob/master/functions#L136
+ # and https://www.kernel.org/doc/html/latest/x86/boot.html#the-real-mode-kernel-header
+ with open(filename, 'rb') as f:
+ f.seek(0x202)
+ magic = f.read(4)
+ if magic != b'HdrS':
+ raise ValueError('Real-Mode Kernel Header magic not found')
+ f.seek(0x20E)
+ offset = f.read(1)[0] + f.read(1)[0]*256 # Pointer to kernel version string
+ f.seek(0x200 + offset)
+ text = f.read(128)
+ text = text.split(b'\0', maxsplit=1)[0]
+ text = text.decode()
+
+ if not (m := re.match(cls.VERSION_PATTERN, text)):
+ raise ValueError(f'Cannot parse version-host-release uname string: {text!r}')
+ return m.group('version')
+
+ @classmethod
+ def scrape_elf(cls, filename, opts=None):
+ readelf = find_tool('readelf', opts=opts)
+
+ cmd = [
+ readelf,
+ '--notes',
+ filename,
+ ]
+
+ print('+', shell_join(cmd))
+ try:
+ notes = subprocess.check_output(cmd, stderr=subprocess.PIPE, text=True)
+ except subprocess.CalledProcessError as e:
+ raise ValueError(e.stderr.strip()) from e
+
+ if not (m := re.search(cls.NOTES_PATTERN, notes, re.MULTILINE)):
+ raise ValueError('Cannot find Linux version note')
+
+ text = ''.join(chr(int(c, 16)) for c in m.group('version').split())
+ return text.rstrip('\0')
+
+ @classmethod
+ def scrape_generic(cls, filename, opts=None):
+ # import libarchive
+ # libarchive-c fails with
+ # ArchiveError: Unrecognized archive format (errno=84, retcode=-30, archive_p=94705420454656)
+
+ # Based on https://gitlab.archlinux.org/archlinux/mkinitcpio/mkinitcpio/-/blob/master/functions#L209
+
+ text = maybe_decompress(filename)
+ if not (m := re.search(cls.TEXT_PATTERN, text)):
+ raise ValueError(f'Cannot find {cls.TEXT_PATTERN!r} in {filename}')
+
+ return m.group('version').decode()
+
+ @classmethod
+ def scrape(cls, filename, opts=None):
+ for func in (cls.scrape_x86, cls.scrape_elf, cls.scrape_generic):
+ try:
+ version = func(filename, opts=opts)
+ print(f'Found uname version: {version}')
+ return version
+ except ValueError as e:
+ print(str(e))
+ return None
+
+DEFAULT_SECTIONS_TO_SHOW = {
+ '.linux' : 'binary',
+ '.initrd' : 'binary',
+ '.splash' : 'binary',
+ '.dtb' : 'binary',
+ '.cmdline' : 'text',
+ '.osrel' : 'text',
+ '.uname' : 'text',
+ '.pcrpkey' : 'text',
+ '.pcrsig' : 'text',
+ '.sbat' : 'text',
+ '.sbom' : 'binary',
+}
+
+@dataclasses.dataclass
+class Section:
+ name: str
+ content: Optional[pathlib.Path]
+ tmpfile: Optional[IO] = None
+ measure: bool = False
+ output_mode: Optional[str] = None
+
+ @classmethod
+ def create(cls, name, contents, **kwargs):
+ if isinstance(contents, (str, bytes)):
+ mode = 'wt' if isinstance(contents, str) else 'wb'
+ tmp = tempfile.NamedTemporaryFile(mode=mode, prefix=f'tmp{name}')
+ tmp.write(contents)
+ tmp.flush()
+ contents = pathlib.Path(tmp.name)
+ else:
+ tmp = None
+
+ return cls(name, contents, tmpfile=tmp, **kwargs)
+
+ @classmethod
+ def parse_input(cls, s):
+ try:
+ name, contents, *rest = s.split(':')
+ except ValueError as e:
+ raise ValueError(f'Cannot parse section spec (name or contents missing): {s!r}') from e
+ if rest:
+ raise ValueError(f'Cannot parse section spec (extraneous parameters): {s!r}')
+
+ if contents.startswith('@'):
+ contents = pathlib.Path(contents[1:])
+
+ sec = cls.create(name, contents)
+ sec.check_name()
+ return sec
+
+ @classmethod
+ def parse_output(cls, s):
+ if not (m := re.match(r'([a-zA-Z0-9_.]+):(text|binary)(?:@(.+))?', s)):
+ raise ValueError(f'Cannot parse section spec: {s!r}')
+
+ name, ttype, out = m.groups()
+ out = pathlib.Path(out) if out else None
+
+ return cls.create(name, out, output_mode=ttype)
+
+ def size(self):
+ return self.content.stat().st_size
+
+ def check_name(self):
+ # PE section names with more than 8 characters are legal, but our stub does
+ # not support them.
+ if not self.name.isascii() or not self.name.isprintable():
+ raise ValueError(f'Bad section name: {self.name!r}')
+ if len(self.name) > 8:
+ raise ValueError(f'Section name too long: {self.name!r}')
+
+
+@dataclasses.dataclass
+class UKI:
+ executable: list[Union[pathlib.Path, str]]
+ sections: list[Section] = dataclasses.field(default_factory=list, init=False)
+
+ def add_section(self, section):
+ if section.name in [s.name for s in self.sections]:
+ raise ValueError(f'Duplicate section {section.name}')
+
+ self.sections += [section]
+
+
+def parse_banks(s):
+ banks = re.split(r',|\s+', s)
+ # TODO: do some sanity checking here
+ return banks
+
+
+KNOWN_PHASES = (
+ 'enter-initrd',
+ 'leave-initrd',
+ 'sysinit',
+ 'ready',
+ 'shutdown',
+ 'final',
+)
+
+def parse_phase_paths(s):
+ # Split on commas or whitespace here. Commas might be hard to parse visually.
+ paths = re.split(r',|\s+', s)
+
+ for path in paths:
+ for phase in path.split(':'):
+ if phase not in KNOWN_PHASES:
+ raise argparse.ArgumentTypeError(f'Unknown boot phase {phase!r} ({path=})')
+
+ return paths
+
+
+def check_splash(filename):
+ if filename is None:
+ return
+
+ # import is delayed, to avoid import when the splash image is not used
+ try:
+ from PIL import Image
+ except ImportError:
+ return
+
+ img = Image.open(filename, formats=['BMP'])
+ print(f'Splash image {filename} is {img.width}×{img.height} pixels')
+
+
+def check_inputs(opts):
+ for name, value in vars(opts).items():
+ if name in {'output', 'tools'}:
+ continue
+
+ if isinstance(value, pathlib.Path):
+ # Open file to check that we can read it, or generate an exception
+ value.open().close()
+ elif isinstance(value, list):
+ for item in value:
+ if isinstance(item, pathlib.Path):
+ item.open().close()
+
+ check_splash(opts.splash)
+
+
+def check_cert_and_keys_nonexistent(opts):
+ # Raise if any of the keys and certs are found on disk
+ paths = itertools.chain(
+ (opts.sb_key, opts.sb_cert),
+ *((priv_key, pub_key)
+ for priv_key, pub_key, _ in key_path_groups(opts)))
+ for path in paths:
+ if path and path.exists():
+ raise ValueError(f'{path} is present')
+
+
+def find_tool(name, fallback=None, opts=None):
+ if opts and opts.tools:
+ for d in opts.tools:
+ tool = d / name
+ if tool.exists():
+ return tool
+
+ if shutil.which(name) is not None:
+ return name
+
+ if fallback is None:
+ print(f"Tool {name} not installed!")
+
+ return fallback
+
+def combine_signatures(pcrsigs):
+ combined = collections.defaultdict(list)
+ for pcrsig in pcrsigs:
+ for bank, sigs in pcrsig.items():
+ for sig in sigs:
+ if sig not in combined[bank]:
+ combined[bank] += [sig]
+ return json.dumps(combined)
+
+
+def key_path_groups(opts):
+ if not opts.pcr_private_keys:
+ return
+
+ n_priv = len(opts.pcr_private_keys)
+ pub_keys = opts.pcr_public_keys or [None] * n_priv
+ pp_groups = opts.phase_path_groups or [None] * n_priv
+
+ yield from zip(opts.pcr_private_keys,
+ pub_keys,
+ pp_groups)
+
+
+def call_systemd_measure(uki, linux, opts):
+ measure_tool = find_tool('systemd-measure',
+ '/usr/lib/systemd/systemd-measure',
+ opts=opts)
+
+ banks = opts.pcr_banks or ()
+
+ # PCR measurement
+
+ if opts.measure:
+ pp_groups = opts.phase_path_groups or []
+
+ cmd = [
+ measure_tool,
+ 'calculate',
+ f'--linux={linux}',
+ *(f"--{s.name.removeprefix('.')}={s.content}"
+ for s in uki.sections
+ if s.measure),
+ *(f'--bank={bank}'
+ for bank in banks),
+ # For measurement, the keys are not relevant, so we can lump all the phase paths
+ # into one call to systemd-measure calculate.
+ *(f'--phase={phase_path}'
+ for phase_path in itertools.chain.from_iterable(pp_groups)),
+ ]
+
+ print('+', shell_join(cmd))
+ subprocess.check_call(cmd)
+
+ # PCR signing
+
+ if opts.pcr_private_keys:
+ pcrsigs = []
+
+ cmd = [
+ measure_tool,
+ 'sign',
+ f'--linux={linux}',
+ *(f"--{s.name.removeprefix('.')}={s.content}"
+ for s in uki.sections
+ if s.measure),
+ *(f'--bank={bank}'
+ for bank in banks),
+ ]
+
+ for priv_key, pub_key, group in key_path_groups(opts):
+ extra = [f'--private-key={priv_key}']
+ if pub_key:
+ extra += [f'--public-key={pub_key}']
+ extra += [f'--phase={phase_path}' for phase_path in group or ()]
+
+ print('+', shell_join(cmd + extra))
+ pcrsig = subprocess.check_output(cmd + extra, text=True)
+ pcrsig = json.loads(pcrsig)
+ pcrsigs += [pcrsig]
+
+ combined = combine_signatures(pcrsigs)
+ uki.add_section(Section.create('.pcrsig', combined))
+
+
+def join_initrds(initrds):
+ if not initrds:
+ return None
+ if len(initrds) == 1:
+ return initrds[0]
+
+ seq = []
+ for file in initrds:
+ initrd = file.read_bytes()
+ n = len(initrd)
+ padding = b'\0' * (round_up(n, 4) - n) # pad to 32 bit alignment
+ seq += [initrd, padding]
+
+ return b''.join(seq)
+
+
+def pairwise(iterable):
+ a, b = itertools.tee(iterable)
+ next(b, None)
+ return zip(a, b)
+
+
+class PEError(Exception):
+ pass
+
+
+def pe_add_sections(uki: UKI, output: str):
+ pe = pefile.PE(uki.executable, fast_load=True)
+
+ # Old stubs do not have the symbol/string table stripped, even though image files should not have one.
+ if symbol_table := pe.FILE_HEADER.PointerToSymbolTable:
+ symbol_table_size = 18 * pe.FILE_HEADER.NumberOfSymbols
+ if string_table_size := pe.get_dword_from_offset(symbol_table + symbol_table_size):
+ symbol_table_size += string_table_size
+
+ # Let's be safe and only strip it if it's at the end of the file.
+ if symbol_table + symbol_table_size == len(pe.__data__):
+ pe.__data__ = pe.__data__[:symbol_table]
+ pe.FILE_HEADER.PointerToSymbolTable = 0
+ pe.FILE_HEADER.NumberOfSymbols = 0
+ pe.FILE_HEADER.IMAGE_FILE_LOCAL_SYMS_STRIPPED = True
+
+ # Old stubs might have been stripped, leading to unaligned raw data values, so let's fix them up here.
+ # pylint thinks that Structure doesn't have various members that it has…
+ # pylint: disable=no-member
+
+ for i, section in enumerate(pe.sections):
+ oldp = section.PointerToRawData
+ oldsz = section.SizeOfRawData
+ section.PointerToRawData = round_up(oldp, pe.OPTIONAL_HEADER.FileAlignment)
+ section.SizeOfRawData = round_up(oldsz, pe.OPTIONAL_HEADER.FileAlignment)
+ padp = section.PointerToRawData - oldp
+ padsz = section.SizeOfRawData - oldsz
+
+ for later_section in pe.sections[i+1:]:
+ later_section.PointerToRawData += padp + padsz
+
+ pe.__data__ = pe.__data__[:oldp] + bytes(padp) + pe.__data__[oldp:oldp+oldsz] + bytes(padsz) + pe.__data__[oldp+oldsz:]
+
+ # We might not have any space to add new sections. Let's try our best to make some space by padding the
+ # SizeOfHeaders to a multiple of the file alignment. This is safe because the first section's data starts
+ # at a multiple of the file alignment, so all space before that is unused.
+ pe.OPTIONAL_HEADER.SizeOfHeaders = round_up(pe.OPTIONAL_HEADER.SizeOfHeaders, pe.OPTIONAL_HEADER.FileAlignment)
+ pe = pefile.PE(data=pe.write(), fast_load=True)
+
+ warnings = pe.get_warnings()
+ if warnings:
+ raise PEError(f'pefile warnings treated as errors: {warnings}')
+
+ security = pe.OPTIONAL_HEADER.DATA_DIRECTORY[pefile.DIRECTORY_ENTRY['IMAGE_DIRECTORY_ENTRY_SECURITY']]
+ if security.VirtualAddress != 0:
+ # We could strip the signatures, but why would anyone sign the stub?
+ raise PEError('Stub image is signed, refusing.')
+
+ for section in uki.sections:
+ new_section = pefile.SectionStructure(pe.__IMAGE_SECTION_HEADER_format__, pe=pe)
+ new_section.__unpack__(b'\0' * new_section.sizeof())
+
+ offset = pe.sections[-1].get_file_offset() + new_section.sizeof()
+ if offset + new_section.sizeof() > pe.OPTIONAL_HEADER.SizeOfHeaders:
+ raise PEError(f'Not enough header space to add section {section.name}.')
+
+ assert section.content
+ data = section.content.read_bytes()
+
+ new_section.set_file_offset(offset)
+ new_section.Name = section.name.encode()
+ new_section.Misc_VirtualSize = len(data)
+ # Non-stripped stubs might still have an unaligned symbol table at the end, making their size
+ # unaligned, so we make sure to explicitly pad the pointer to new sections to an aligned offset.
+ new_section.PointerToRawData = round_up(len(pe.__data__), pe.OPTIONAL_HEADER.FileAlignment)
+ new_section.SizeOfRawData = round_up(len(data), pe.OPTIONAL_HEADER.FileAlignment)
+ new_section.VirtualAddress = round_up(
+ pe.sections[-1].VirtualAddress + pe.sections[-1].Misc_VirtualSize,
+ pe.OPTIONAL_HEADER.SectionAlignment,
+ )
+
+ new_section.IMAGE_SCN_MEM_READ = True
+ if section.name == '.linux':
+ # Old kernels that use EFI handover protocol will be executed inline.
+ new_section.IMAGE_SCN_CNT_CODE = True
+ else:
+ new_section.IMAGE_SCN_CNT_INITIALIZED_DATA = True
+
+ # Special case, mostly for .sbat: the stub will already have a .sbat section, but we want to append
+ # the one from the kernel to it. It should be small enough to fit in the existing section, so just
+ # swap the data.
+ for i, s in enumerate(pe.sections):
+ if s.Name.rstrip(b"\x00").decode() == section.name:
+ if new_section.Misc_VirtualSize > s.SizeOfRawData:
+ raise PEError(f'Not enough space in existing section {section.name} to append new data.')
+
+ padding = bytes(new_section.SizeOfRawData - new_section.Misc_VirtualSize)
+ pe.__data__ = pe.__data__[:s.PointerToRawData] + data + padding + pe.__data__[pe.sections[i+1].PointerToRawData:]
+ s.SizeOfRawData = new_section.SizeOfRawData
+ s.Misc_VirtualSize = new_section.Misc_VirtualSize
+ break
+ else:
+ pe.__data__ = pe.__data__[:] + bytes(new_section.PointerToRawData - len(pe.__data__)) + data + bytes(new_section.SizeOfRawData - len(data))
+
+ pe.FILE_HEADER.NumberOfSections += 1
+ pe.OPTIONAL_HEADER.SizeOfInitializedData += new_section.Misc_VirtualSize
+ pe.__structures__.append(new_section)
+ pe.sections.append(new_section)
+
+ pe.OPTIONAL_HEADER.CheckSum = 0
+ pe.OPTIONAL_HEADER.SizeOfImage = round_up(
+ pe.sections[-1].VirtualAddress + pe.sections[-1].Misc_VirtualSize,
+ pe.OPTIONAL_HEADER.SectionAlignment,
+ )
+
+ pe.write(output)
+
+def merge_sbat(input_pe: [pathlib.Path], input_text: [str]) -> str:
+ sbat = []
+
+ for f in input_pe:
+ try:
+ pe = pefile.PE(f, fast_load=True)
+ except pefile.PEFormatError:
+ print(f"{f} is not a valid PE file, not extracting SBAT section.")
+ continue
+
+ for section in pe.sections:
+ if section.Name.rstrip(b"\x00").decode() == ".sbat":
+ split = section.get_data().rstrip(b"\x00").decode().splitlines()
+ if not split[0].startswith('sbat,'):
+ print(f"{f} does not contain a valid SBAT section, skipping.")
+ continue
+ # Filter out the sbat line, we'll add it back later, there needs to be only one and it
+ # needs to be first.
+ sbat += split[1:]
+
+ for t in input_text:
+ if t.startswith('@'):
+ t = pathlib.Path(t[1:]).read_text()
+ split = t.splitlines()
+ if not split[0].startswith('sbat,'):
+ print(f"{t} does not contain a valid SBAT section, skipping.")
+ continue
+ sbat += split[1:]
+
+ return 'sbat,1,SBAT Version,sbat,1,https://github.com/rhboot/shim/blob/main/SBAT.md\n' + '\n'.join(sbat) + "\n\x00"
+
+def signer_sign(cmd):
+ print('+', shell_join(cmd))
+ subprocess.check_call(cmd)
+
+def find_sbsign(opts=None):
+ return find_tool('sbsign', opts=opts)
+
+def sbsign_sign(sbsign_tool, input_f, output_f, opts=None):
+ sign_invocation = [
+ sbsign_tool,
+ '--key', opts.sb_key,
+ '--cert', opts.sb_cert,
+ input_f,
+ '--output', output_f,
+ ]
+ if opts.signing_engine is not None:
+ sign_invocation += ['--engine', opts.signing_engine]
+ signer_sign(sign_invocation)
+
+def find_pesign(opts=None):
+ return find_tool('pesign', opts=opts)
+
+def pesign_sign(pesign_tool, input_f, output_f, opts=None):
+ sign_invocation = [
+ pesign_tool, '-s', '--force',
+ '-n', opts.sb_certdir,
+ '-c', opts.sb_cert_name,
+ '-i', input_f,
+ '-o', output_f,
+ ]
+ signer_sign(sign_invocation)
+
+SBVERIFY = {
+ 'name': 'sbverify',
+ 'option': '--list',
+ 'output': 'No signature table present',
+}
+
+PESIGCHECK = {
+ 'name': 'pesign',
+ 'option': '-i',
+ 'output': 'No signatures found.',
+ 'flags': '-S'
+}
+
+def verify(tool, opts):
+ verify_tool = find_tool(tool['name'], opts=opts)
+ cmd = [
+ verify_tool,
+ tool['option'],
+ opts.linux,
+ ]
+ if 'flags' in tool:
+ cmd.append(tool['flags'])
+
+ print('+', shell_join(cmd))
+ info = subprocess.check_output(cmd, text=True)
+
+ return tool['output'] in info
+
+def make_uki(opts):
+ # kernel payload signing
+
+ sign_tool = None
+ sign_args_present = opts.sb_key or opts.sb_cert_name
+ sign_kernel = opts.sign_kernel
+ sign = None
+ linux = opts.linux
+
+ if sign_args_present:
+ if opts.signtool == 'sbsign':
+ sign_tool = find_sbsign(opts=opts)
+ sign = sbsign_sign
+ verify_tool = SBVERIFY
+ else:
+ sign_tool = find_pesign(opts=opts)
+ sign = pesign_sign
+ verify_tool = PESIGCHECK
+
+ if sign_tool is None:
+ raise ValueError(f'{opts.signtool}, required for signing, is not installed')
+
+ if sign_kernel is None and opts.linux is not None:
+ # figure out if we should sign the kernel
+ sign_kernel = verify(verify_tool, opts)
+
+ if sign_kernel:
+ linux_signed = tempfile.NamedTemporaryFile(prefix='linux-signed')
+ linux = pathlib.Path(linux_signed.name)
+ sign(sign_tool, opts.linux, linux, opts=opts)
+
+ if opts.uname is None and opts.linux is not None:
+ print('Kernel version not specified, starting autodetection 😖.')
+ opts.uname = Uname.scrape(opts.linux, opts=opts)
+
+ uki = UKI(opts.stub)
+ initrd = join_initrds(opts.initrd)
+
+ pcrpkey = opts.pcrpkey
+ if pcrpkey is None:
+ if opts.pcr_public_keys and len(opts.pcr_public_keys) == 1:
+ pcrpkey = opts.pcr_public_keys[0]
+ elif opts.pcr_private_keys and len(opts.pcr_private_keys) == 1:
+ import cryptography.hazmat.primitives.serialization as serialization
+ privkey = serialization.load_pem_private_key(opts.pcr_private_keys[0].read_bytes(), password=None)
+ pcrpkey = privkey.public_key().public_bytes(
+ encoding=serialization.Encoding.PEM,
+ format=serialization.PublicFormat.SubjectPublicKeyInfo,
+ )
+
+ sections = [
+ # name, content, measure?
+ ('.osrel', opts.os_release, True ),
+ ('.cmdline', opts.cmdline, True ),
+ ('.dtb', opts.devicetree, True ),
+ ('.uname', opts.uname, True ),
+ ('.splash', opts.splash, True ),
+ ('.pcrpkey', pcrpkey, True ),
+ ('.initrd', initrd, True ),
+
+ # linux shall be last to leave breathing room for decompression.
+ # We'll add it later.
+ ]
+
+ for name, content, measure in sections:
+ if content:
+ uki.add_section(Section.create(name, content, measure=measure))
+
+ # systemd-measure doesn't know about those extra sections
+ for section in opts.sections:
+ uki.add_section(section)
+
+ if linux is not None:
+ # Merge the .sbat sections from stub, kernel and parameter, so that revocation can be done on either.
+ uki.add_section(Section.create('.sbat', merge_sbat([opts.stub, linux], opts.sbat), measure=True))
+ else:
+ # Addons don't use the stub so we add SBAT manually
+ if not opts.sbat:
+ opts.sbat = ["""sbat,1,SBAT Version,sbat,1,https://github.com/rhboot/shim/blob/main/SBAT.md
+uki,1,UKI,uki,1,https://www.freedesktop.org/software/systemd/man/systemd-stub.html
+"""]
+ uki.add_section(Section.create('.sbat', merge_sbat([], opts.sbat), measure=False))
+
+ # PCR measurement and signing
+
+ # We pass in the contents for .linux separately because we need them to do the measurement but can't add
+ # the section yet because we want .linux to be the last section. Make sure any other sections are added
+ # before this function is called.
+ call_systemd_measure(uki, linux, opts=opts)
+
+ # UKI creation
+
+ if linux is not None:
+ uki.add_section(Section.create('.linux', linux, measure=True))
+
+ if sign_args_present:
+ unsigned = tempfile.NamedTemporaryFile(prefix='uki')
+ unsigned_output = unsigned.name
+ else:
+ unsigned_output = opts.output
+
+ pe_add_sections(uki, unsigned_output)
+
+ # UKI signing
+
+ if sign_args_present:
+ assert sign
+ sign(sign_tool, unsigned_output, opts.output, opts=opts)
+
+ # We end up with no executable bits, let's reapply them
+ os.umask(umask := os.umask(0))
+ os.chmod(opts.output, 0o777 & ~umask)
+
+ print(f"Wrote {'signed' if sign_args_present else 'unsigned'} {opts.output}")
+
+
+ONE_DAY = datetime.timedelta(1, 0, 0)
+
+
+@contextlib.contextmanager
+def temporary_umask(mask: int):
+ # Drop <mask> bits from umask
+ old = os.umask(0)
+ os.umask(old | mask)
+ try:
+ yield
+ finally:
+ os.umask(old)
+
+
+def generate_key_cert_pair(
+ common_name: str,
+ valid_days: int,
+ keylength: int = 2048,
+) -> tuple[bytes]:
+
+ from cryptography import x509
+ from cryptography.hazmat.primitives import serialization, hashes
+ from cryptography.hazmat.primitives.asymmetric import rsa
+
+ # We use a keylength of 2048 bits. That is what Microsoft documents as
+ # supported/expected:
+ # https://learn.microsoft.com/en-us/windows-hardware/manufacture/desktop/windows-secure-boot-key-creation-and-management-guidance?view=windows-11#12-public-key-cryptography
+
+ now = datetime.datetime.utcnow()
+
+ key = rsa.generate_private_key(
+ public_exponent=65537,
+ key_size=keylength,
+ )
+ cert = x509.CertificateBuilder(
+ ).subject_name(
+ x509.Name([x509.NameAttribute(x509.oid.NameOID.COMMON_NAME, common_name)])
+ ).issuer_name(
+ x509.Name([x509.NameAttribute(x509.oid.NameOID.COMMON_NAME, common_name)])
+ ).not_valid_before(
+ now,
+ ).not_valid_after(
+ now + ONE_DAY * valid_days
+ ).serial_number(
+ x509.random_serial_number()
+ ).public_key(
+ key.public_key()
+ ).add_extension(
+ x509.BasicConstraints(ca=False, path_length=None),
+ critical=True,
+ ).sign(
+ private_key=key,
+ algorithm=hashes.SHA256(),
+ )
+
+ cert_pem = cert.public_bytes(
+ encoding=serialization.Encoding.PEM,
+ )
+ key_pem = key.private_bytes(
+ encoding=serialization.Encoding.PEM,
+ format=serialization.PrivateFormat.TraditionalOpenSSL,
+ encryption_algorithm=serialization.NoEncryption(),
+ )
+
+ return key_pem, cert_pem
+
+
+def generate_priv_pub_key_pair(keylength : int = 2048) -> tuple[bytes]:
+ from cryptography.hazmat.primitives import serialization
+ from cryptography.hazmat.primitives.asymmetric import rsa
+
+ key = rsa.generate_private_key(
+ public_exponent=65537,
+ key_size=keylength,
+ )
+ priv_key_pem = key.private_bytes(
+ encoding=serialization.Encoding.PEM,
+ format=serialization.PrivateFormat.TraditionalOpenSSL,
+ encryption_algorithm=serialization.NoEncryption(),
+ )
+ pub_key_pem = key.public_key().public_bytes(
+ encoding=serialization.Encoding.PEM,
+ format=serialization.PublicFormat.SubjectPublicKeyInfo,
+ )
+
+ return priv_key_pem, pub_key_pem
+
+
+def generate_keys(opts):
+ # This will generate keys and certificates and write them to the paths that
+ # are specified as input paths.
+ if opts.sb_key or opts.sb_cert:
+ fqdn = socket.getfqdn()
+ cn = f'SecureBoot signing key on host {fqdn}'
+ key_pem, cert_pem = generate_key_cert_pair(
+ common_name=cn,
+ valid_days=opts.sb_cert_validity,
+ )
+ print(f'Writing SecureBoot private key to {opts.sb_key}')
+ with temporary_umask(0o077):
+ opts.sb_key.write_bytes(key_pem)
+ print(f'Writing SecureBoot certificate to {opts.sb_cert}')
+ opts.sb_cert.write_bytes(cert_pem)
+
+ for priv_key, pub_key, _ in key_path_groups(opts):
+ priv_key_pem, pub_key_pem = generate_priv_pub_key_pair()
+
+ print(f'Writing private key for PCR signing to {priv_key}')
+ with temporary_umask(0o077):
+ priv_key.write_bytes(priv_key_pem)
+ if pub_key:
+ print(f'Writing public key for PCR signing to {pub_key}')
+ pub_key.write_bytes(pub_key_pem)
+
+
+def inspect_section(opts, section):
+ name = section.Name.rstrip(b"\x00").decode()
+
+ # find the config for this section in opts and whether to show it
+ config = opts.sections_by_name.get(name, None)
+ show = (config or
+ opts.all or
+ (name in DEFAULT_SECTIONS_TO_SHOW and not opts.sections))
+ if not show:
+ return name, None
+
+ ttype = config.output_mode if config else DEFAULT_SECTIONS_TO_SHOW.get(name, 'binary')
+
+ size = section.Misc_VirtualSize
+ # TODO: Use ignore_padding once we can depend on a newer version of pefile
+ data = section.get_data(length=size)
+ digest = sha256(data).hexdigest()
+
+ struct = {
+ 'size' : size,
+ 'sha256' : digest,
+ }
+
+ if ttype == 'text':
+ try:
+ struct['text'] = data.decode()
+ except UnicodeDecodeError as e:
+ print(f"Section {name!r} is not valid text: {e}")
+ struct['text'] = '(not valid UTF-8)'
+
+ if config and config.content:
+ assert isinstance(config.content, pathlib.Path)
+ config.content.write_bytes(data)
+
+ if opts.json == 'off':
+ print(f"{name}:\n size: {size} bytes\n sha256: {digest}")
+ if ttype == 'text':
+ text = textwrap.indent(struct['text'].rstrip(), ' ' * 4)
+ print(f" text:\n{text}")
+
+ return name, struct
+
+
+def inspect_sections(opts):
+ indent = 4 if opts.json == 'pretty' else None
+
+ for file in opts.files:
+ pe = pefile.PE(file, fast_load=True)
+ gen = (inspect_section(opts, section) for section in pe.sections)
+ descs = {key:val for (key, val) in gen if val}
+ if opts.json != 'off':
+ json.dump(descs, sys.stdout, indent=indent)
+
+
+@dataclasses.dataclass(frozen=True)
+class ConfigItem:
+ @staticmethod
+ def config_list_prepend(
+ namespace: argparse.Namespace,
+ group: Optional[str],
+ dest: str,
+ value: Any,
+ ) -> None:
+ "Prepend value to namespace.<dest>"
+
+ assert not group
+
+ old = getattr(namespace, dest, [])
+ if old is None:
+ old = []
+ setattr(namespace, dest, value + old)
+
+ @staticmethod
+ def config_set_if_unset(
+ namespace: argparse.Namespace,
+ group: Optional[str],
+ dest: str,
+ value: Any,
+ ) -> None:
+ "Set namespace.<dest> to value only if it was None"
+
+ assert not group
+
+ if getattr(namespace, dest) is None:
+ setattr(namespace, dest, value)
+
+ @staticmethod
+ def config_set(
+ namespace: argparse.Namespace,
+ group: Optional[str],
+ dest: str,
+ value: Any,
+ ) -> None:
+ "Set namespace.<dest> to value only if it was None"
+
+ assert not group
+
+ setattr(namespace, dest, value)
+
+ @staticmethod
+ def config_set_group(
+ namespace: argparse.Namespace,
+ group: Optional[str],
+ dest: str,
+ value: Any,
+ ) -> None:
+ "Set namespace.<dest>[idx] to value, with idx derived from group"
+
+ # pylint: disable=protected-access
+ if group not in namespace._groups:
+ namespace._groups += [group]
+ idx = namespace._groups.index(group)
+
+ old = getattr(namespace, dest, None)
+ if old is None:
+ old = []
+ setattr(namespace, dest,
+ old + ([None] * (idx - len(old))) + [value])
+
+ @staticmethod
+ def parse_boolean(s: str) -> bool:
+ "Parse 1/true/yes/y/t/on as true and 0/false/no/n/f/off/None as false"
+ s_l = s.lower()
+ if s_l in {'1', 'true', 'yes', 'y', 't', 'on'}:
+ return True
+ if s_l in {'0', 'false', 'no', 'n', 'f', 'off'}:
+ return False
+ raise ValueError('f"Invalid boolean literal: {s!r}')
+
+ # arguments for argparse.ArgumentParser.add_argument()
+ name: Union[str, tuple[str, str]]
+ dest: Optional[str] = None
+ metavar: Optional[str] = None
+ type: Optional[Callable] = None
+ nargs: Optional[str] = None
+ action: Optional[Union[str, Callable]] = None
+ default: Any = None
+ version: Optional[str] = None
+ choices: Optional[tuple[str, ...]] = None
+ const: Optional[Any] = None
+ help: Optional[str] = None
+
+ # metadata for config file parsing
+ config_key: Optional[str] = None
+ config_push: Callable[[argparse.Namespace, Optional[str], str, Any], None] = \
+ config_set_if_unset
+
+ def _names(self) -> tuple[str, ...]:
+ return self.name if isinstance(self.name, tuple) else (self.name,)
+
+ def argparse_dest(self) -> str:
+ # It'd be nice if argparse exported this, but I don't see that in the API
+ if self.dest:
+ return self.dest
+ return self._names()[0].lstrip('-').replace('-', '_')
+
+ def add_to(self, parser: argparse.ArgumentParser):
+ kwargs = { key:val
+ for key in dataclasses.asdict(self)
+ if (key not in ('name', 'config_key', 'config_push') and
+ (val := getattr(self, key)) is not None) }
+ args = self._names()
+ parser.add_argument(*args, **kwargs)
+
+ def apply_config(self, namespace, section, group, key, value) -> None:
+ assert f'{section}/{key}' == self.config_key
+ dest = self.argparse_dest()
+
+ conv: Callable[[str], Any]
+ if self.action == argparse.BooleanOptionalAction:
+ # We need to handle this case separately: the options are called
+ # --foo and --no-foo, and no argument is parsed. But in the config
+ # file, we have Foo=yes or Foo=no.
+ conv = self.parse_boolean
+ elif self.type:
+ conv = self.type
+ else:
+ conv = lambda s:s
+
+ # This is a bit ugly, but --initrd is the only option which is specified
+ # with multiple args on the command line and a space-separated list in the
+ # config file.
+ if self.name == '--initrd':
+ value = [conv(v) for v in value.split()]
+ else:
+ value = conv(value)
+
+ self.config_push(namespace, group, dest, value)
+
+ def config_example(self) -> tuple[Optional[str], Optional[str], Optional[str]]:
+ if not self.config_key:
+ return None, None, None
+ section_name, key = self.config_key.split('/', 1)
+ if section_name.endswith(':'):
+ section_name += 'NAME'
+ if self.choices:
+ value = '|'.join(self.choices)
+ else:
+ value = self.metavar or self.argparse_dest().upper()
+ return (section_name, key, value)
+
+
+VERBS = ('build', 'genkey', 'inspect')
+
+CONFIG_ITEMS = [
+ ConfigItem(
+ 'positional',
+ metavar = 'VERB',
+ nargs = '*',
+ help = argparse.SUPPRESS,
+ ),
+
+ ConfigItem(
+ '--version',
+ action = 'version',
+ version = f'ukify {__version__}',
+ ),
+
+ ConfigItem(
+ '--summary',
+ help = 'print parsed config and exit',
+ action = 'store_true',
+ ),
+
+ ConfigItem(
+ '--linux',
+ type = pathlib.Path,
+ help = 'vmlinuz file [.linux section]',
+ config_key = 'UKI/Linux',
+ ),
+
+ ConfigItem(
+ '--initrd',
+ metavar = 'INITRD',
+ type = pathlib.Path,
+ action = 'append',
+ help = 'initrd file [part of .initrd section]',
+ config_key = 'UKI/Initrd',
+ config_push = ConfigItem.config_list_prepend,
+ ),
+
+ ConfigItem(
+ ('--config', '-c'),
+ metavar = 'PATH',
+ type = pathlib.Path,
+ help = 'configuration file',
+ ),
+
+ ConfigItem(
+ '--cmdline',
+ metavar = 'TEXT|@PATH',
+ help = 'kernel command line [.cmdline section]',
+ config_key = 'UKI/Cmdline',
+ ),
+
+ ConfigItem(
+ '--os-release',
+ metavar = 'TEXT|@PATH',
+ help = 'path to os-release file [.osrel section]',
+ config_key = 'UKI/OSRelease',
+ ),
+
+ ConfigItem(
+ '--devicetree',
+ metavar = 'PATH',
+ type = pathlib.Path,
+ help = 'Device Tree file [.dtb section]',
+ config_key = 'UKI/DeviceTree',
+ ),
+ ConfigItem(
+ '--splash',
+ metavar = 'BMP',
+ type = pathlib.Path,
+ help = 'splash image bitmap file [.splash section]',
+ config_key = 'UKI/Splash',
+ ),
+ ConfigItem(
+ '--pcrpkey',
+ metavar = 'KEY',
+ type = pathlib.Path,
+ help = 'embedded public key to seal secrets to [.pcrpkey section]',
+ config_key = 'UKI/PCRPKey',
+ ),
+ ConfigItem(
+ '--uname',
+ metavar='VERSION',
+ help='"uname -r" information [.uname section]',
+ config_key = 'UKI/Uname',
+ ),
+
+ ConfigItem(
+ '--efi-arch',
+ metavar = 'ARCH',
+ choices = ('ia32', 'x64', 'arm', 'aa64', 'riscv64'),
+ help = 'target EFI architecture',
+ config_key = 'UKI/EFIArch',
+ ),
+
+ ConfigItem(
+ '--stub',
+ type = pathlib.Path,
+ help = 'path to the sd-stub file [.text,.data,… sections]',
+ config_key = 'UKI/Stub',
+ ),
+
+ ConfigItem(
+ '--sbat',
+ metavar = 'TEXT|@PATH',
+ help = 'SBAT policy [.sbat section]',
+ default = [],
+ action = 'append',
+ config_key = 'UKI/SBAT',
+ ),
+
+ ConfigItem(
+ '--section',
+ dest = 'sections',
+ metavar = 'NAME:TEXT|@PATH',
+ action = 'append',
+ default = [],
+ help = 'section as name and contents [NAME section] or section to print',
+ ),
+
+ ConfigItem(
+ '--pcr-banks',
+ metavar = 'BANK…',
+ type = parse_banks,
+ config_key = 'UKI/PCRBanks',
+ ),
+
+ ConfigItem(
+ '--signing-engine',
+ metavar = 'ENGINE',
+ help = 'OpenSSL engine to use for signing',
+ config_key = 'UKI/SigningEngine',
+ ),
+ ConfigItem(
+ '--signtool',
+ choices = ('sbsign', 'pesign'),
+ dest = 'signtool',
+ help = 'whether to use sbsign or pesign. It will also be inferred by the other \
+ parameters given: when using --secureboot-{private-key/certificate}, sbsign \
+ will be used, otherwise pesign will be used',
+ config_key = 'UKI/SecureBootSigningTool',
+ ),
+ ConfigItem(
+ '--secureboot-private-key',
+ dest = 'sb_key',
+ help = 'required by --signtool=sbsign. Path to key file or engine-specific designation for SB signing',
+ config_key = 'UKI/SecureBootPrivateKey',
+ ),
+ ConfigItem(
+ '--secureboot-certificate',
+ dest = 'sb_cert',
+ help = 'required by --signtool=sbsign. sbsign needs a path to certificate file or engine-specific designation for SB signing',
+ config_key = 'UKI/SecureBootCertificate',
+ ),
+ ConfigItem(
+ '--secureboot-certificate-dir',
+ dest = 'sb_certdir',
+ default = '/etc/pki/pesign',
+ help = 'required by --signtool=pesign. Path to nss certificate database directory for PE signing. Default is /etc/pki/pesign',
+ config_key = 'UKI/SecureBootCertificateDir',
+ config_push = ConfigItem.config_set
+ ),
+ ConfigItem(
+ '--secureboot-certificate-name',
+ dest = 'sb_cert_name',
+ help = 'required by --signtool=pesign. pesign needs a certificate nickname of nss certificate database entry to use for PE signing',
+ config_key = 'UKI/SecureBootCertificateName',
+ ),
+ ConfigItem(
+ '--secureboot-certificate-validity',
+ metavar = 'DAYS',
+ dest = 'sb_cert_validity',
+ default = 365 * 10,
+ help = "period of validity (in days) for a certificate created by 'genkey'",
+ config_key = 'UKI/SecureBootCertificateValidity',
+ config_push = ConfigItem.config_set
+ ),
+
+ ConfigItem(
+ '--sign-kernel',
+ action = argparse.BooleanOptionalAction,
+ help = 'Sign the embedded kernel',
+ config_key = 'UKI/SignKernel',
+ ),
+
+ ConfigItem(
+ '--pcr-private-key',
+ dest = 'pcr_private_keys',
+ metavar = 'PATH',
+ type = pathlib.Path,
+ action = 'append',
+ help = 'private part of the keypair for signing PCR signatures',
+ config_key = 'PCRSignature:/PCRPrivateKey',
+ config_push = ConfigItem.config_set_group,
+ ),
+ ConfigItem(
+ '--pcr-public-key',
+ dest = 'pcr_public_keys',
+ metavar = 'PATH',
+ type = pathlib.Path,
+ action = 'append',
+ help = 'public part of the keypair for signing PCR signatures',
+ config_key = 'PCRSignature:/PCRPublicKey',
+ config_push = ConfigItem.config_set_group,
+ ),
+ ConfigItem(
+ '--phases',
+ dest = 'phase_path_groups',
+ metavar = 'PHASE-PATH…',
+ type = parse_phase_paths,
+ action = 'append',
+ help = 'phase-paths to create signatures for',
+ config_key = 'PCRSignature:/Phases',
+ config_push = ConfigItem.config_set_group,
+ ),
+
+ ConfigItem(
+ '--tools',
+ type = pathlib.Path,
+ action = 'append',
+ help = 'Directories to search for tools (systemd-measure, …)',
+ ),
+
+ ConfigItem(
+ ('--output', '-o'),
+ type = pathlib.Path,
+ help = 'output file path',
+ ),
+
+ ConfigItem(
+ '--measure',
+ action = argparse.BooleanOptionalAction,
+ help = 'print systemd-measure output for the UKI',
+ ),
+
+ ConfigItem(
+ '--json',
+ choices = ('pretty', 'short', 'off'),
+ default = 'off',
+ help = 'generate JSON output',
+ ),
+ ConfigItem(
+ '-j',
+ dest='json',
+ action='store_const',
+ const='pretty',
+ help='equivalent to --json=pretty',
+ ),
+
+ ConfigItem(
+ '--all',
+ help = 'print all sections',
+ action = 'store_true',
+ ),
+]
+
+CONFIGFILE_ITEMS = { item.config_key:item
+ for item in CONFIG_ITEMS
+ if item.config_key }
+
+
+def apply_config(namespace, filename=None):
+ if filename is None:
+ if namespace.config:
+ # Config set by the user, use that.
+ filename = namespace.config
+ print(f'Using config file: {filename}')
+ else:
+ # Try to look for a config file then use the first one found.
+ for config_dir in DEFAULT_CONFIG_DIRS:
+ filename = pathlib.Path(config_dir) / DEFAULT_CONFIG_FILE
+ if filename.is_file():
+ # Found a config file, use it.
+ print(f'Using found config file: {filename}')
+ break
+ else:
+ # No config file specified or found, nothing to do.
+ return
+
+ # Fill in ._groups based on --pcr-public-key=, --pcr-private-key=, and --phases=.
+ assert '_groups' not in namespace
+ n_pcr_priv = len(namespace.pcr_private_keys or ())
+ namespace._groups = list(range(n_pcr_priv)) # pylint: disable=protected-access
+
+ cp = configparser.ConfigParser(
+ comment_prefixes='#',
+ inline_comment_prefixes='#',
+ delimiters='=',
+ empty_lines_in_values=False,
+ interpolation=None,
+ strict=False)
+ # Do not make keys lowercase
+ cp.optionxform = lambda option: option
+
+ # The API is not great.
+ read = cp.read(filename)
+ if not read:
+ raise IOError(f'Failed to read {filename}')
+
+ for section_name, section in cp.items():
+ idx = section_name.find(':')
+ if idx >= 0:
+ section_name, group = section_name[:idx+1], section_name[idx+1:]
+ if not section_name or not group:
+ raise ValueError('Section name components cannot be empty')
+ if ':' in group:
+ raise ValueError('Section name cannot contain more than one ":"')
+ else:
+ group = None
+ for key, value in section.items():
+ if item := CONFIGFILE_ITEMS.get(f'{section_name}/{key}'):
+ item.apply_config(namespace, section_name, group, key, value)
+ else:
+ print(f'Unknown config setting [{section_name}] {key}=')
+
+
+def config_example():
+ prev_section = None
+ for item in CONFIG_ITEMS:
+ section, key, value = item.config_example()
+ if section:
+ if prev_section != section:
+ if prev_section:
+ yield ''
+ yield f'[{section}]'
+ prev_section = section
+ yield f'{key} = {value}'
+
+
+class PagerHelpAction(argparse._HelpAction): # pylint: disable=protected-access
+ def __call__(
+ self,
+ parser: argparse.ArgumentParser,
+ namespace: argparse.Namespace,
+ values: Union[str, Sequence[Any], None] = None,
+ option_string: Optional[str] = None
+ ) -> None:
+ page(parser.format_help(), True)
+ parser.exit()
+
+
+def create_parser():
+ p = argparse.ArgumentParser(
+ description='Build and sign Unified Kernel Images',
+ usage='\n ' + textwrap.dedent('''\
+ ukify {b}build{e} [--linux=LINUX] [--initrd=INITRD] [options…]
+ ukify {b}genkey{e} [options…]
+ ukify {b}inspect{e} FILE… [options…]
+ ''').format(b=Style.bold, e=Style.reset),
+ allow_abbrev=False,
+ add_help=False,
+ epilog='\n '.join(('config file:', *config_example())),
+ formatter_class=argparse.RawDescriptionHelpFormatter,
+ )
+
+ for item in CONFIG_ITEMS:
+ item.add_to(p)
+
+ # Suppress printing of usage synopsis on errors
+ p.error = lambda message: p.exit(2, f'{p.prog}: error: {message}\n')
+
+ # Make --help paged
+ p.add_argument(
+ '-h', '--help',
+ action=PagerHelpAction,
+ help='show this help message and exit',
+ )
+
+ return p
+
+
+def finalize_options(opts):
+ # Figure out which syntax is being used, one of:
+ # ukify verb --arg --arg --arg
+ # ukify linux initrd…
+ if len(opts.positional) >= 1 and opts.positional[0] == 'inspect':
+ opts.verb = opts.positional[0]
+ opts.files = opts.positional[1:]
+ if not opts.files:
+ raise ValueError('file(s) to inspect must be specified')
+ if len(opts.files) > 1 and opts.json != 'off':
+ # We could allow this in the future, but we need to figure out the right structure
+ raise ValueError('JSON output is not allowed with multiple files')
+ elif len(opts.positional) == 1 and opts.positional[0] in VERBS:
+ opts.verb = opts.positional[0]
+ elif opts.linux or opts.initrd:
+ raise ValueError('--linux/--initrd options cannot be used with positional arguments')
+ else:
+ print("Assuming obsolete command line syntax with no verb. Please use 'build'.")
+ if opts.positional:
+ opts.linux = pathlib.Path(opts.positional[0])
+ # If we have initrds from parsing config files, append our positional args at the end
+ opts.initrd = (opts.initrd or []) + [pathlib.Path(arg) for arg in opts.positional[1:]]
+ opts.verb = 'build'
+
+ # Check that --pcr-public-key=, --pcr-private-key=, and --phases=
+ # have either the same number of arguments are are not specified at all.
+ n_pcr_pub = None if opts.pcr_public_keys is None else len(opts.pcr_public_keys)
+ n_pcr_priv = None if opts.pcr_private_keys is None else len(opts.pcr_private_keys)
+ n_phase_path_groups = None if opts.phase_path_groups is None else len(opts.phase_path_groups)
+ if n_pcr_pub is not None and n_pcr_pub != n_pcr_priv:
+ raise ValueError('--pcr-public-key= specifications must match --pcr-private-key=')
+ if n_phase_path_groups is not None and n_phase_path_groups != n_pcr_priv:
+ raise ValueError('--phases= specifications must match --pcr-private-key=')
+
+ if opts.cmdline and opts.cmdline.startswith('@'):
+ opts.cmdline = pathlib.Path(opts.cmdline[1:])
+ elif opts.cmdline:
+ # Drop whitespace from the command line. If we're reading from a file,
+ # we copy the contents verbatim. But configuration specified on the command line
+ # or in the config file may contain additional whitespace that has no meaning.
+ opts.cmdline = ' '.join(opts.cmdline.split())
+
+ if opts.os_release and opts.os_release.startswith('@'):
+ opts.os_release = pathlib.Path(opts.os_release[1:])
+ elif not opts.os_release and opts.linux:
+ p = pathlib.Path('/etc/os-release')
+ if not p.exists():
+ p = pathlib.Path('/usr/lib/os-release')
+ opts.os_release = p
+
+ if opts.efi_arch is None:
+ opts.efi_arch = guess_efi_arch()
+
+ if opts.stub is None:
+ if opts.linux is not None:
+ opts.stub = pathlib.Path(f'/usr/lib/systemd/boot/efi/linux{opts.efi_arch}.efi.stub')
+ else:
+ opts.stub = pathlib.Path(f'/usr/lib/systemd/boot/efi/addon{opts.efi_arch}.efi.stub')
+
+ if opts.signing_engine is None:
+ if opts.sb_key:
+ opts.sb_key = pathlib.Path(opts.sb_key)
+ if opts.sb_cert:
+ opts.sb_cert = pathlib.Path(opts.sb_cert)
+
+ if bool(opts.sb_key) ^ bool(opts.sb_cert):
+ # one param only given, sbsign needs both
+ raise ValueError('--secureboot-private-key= and --secureboot-certificate= must be specified together')
+ elif bool(opts.sb_key) and bool(opts.sb_cert):
+ # both param given, infer sbsign and in case it was given, ensure signtool=sbsign
+ if opts.signtool and opts.signtool != 'sbsign':
+ raise ValueError(f'Cannot provide --signtool={opts.signtool} with --secureboot-private-key= and --secureboot-certificate=')
+ opts.signtool = 'sbsign'
+ elif bool(opts.sb_cert_name):
+ # sb_cert_name given, infer pesign and in case it was given, ensure signtool=pesign
+ if opts.signtool and opts.signtool != 'pesign':
+ raise ValueError(f'Cannot provide --signtool={opts.signtool} with --secureboot-certificate-name=')
+ opts.signtool = 'pesign'
+
+ if opts.sign_kernel and not opts.sb_key and not opts.sb_cert_name:
+ raise ValueError('--sign-kernel requires either --secureboot-private-key= and --secureboot-certificate= (for sbsign) or --secureboot-certificate-name= (for pesign) to be specified')
+
+ if opts.verb == 'build' and opts.output is None:
+ if opts.linux is None:
+ raise ValueError('--output= must be specified when building a PE addon')
+ suffix = '.efi' if opts.sb_key or opts.sb_cert_name else '.unsigned.efi'
+ opts.output = opts.linux.name + suffix
+
+ # Now that we know if we're inputting or outputting, really parse section config
+ f = Section.parse_output if opts.verb == 'inspect' else Section.parse_input
+ opts.sections = [f(s) for s in opts.sections]
+ # A convenience dictionary to make it easy to look up sections
+ opts.sections_by_name = {s.name:s for s in opts.sections}
+
+ if opts.summary:
+ # TODO: replace pprint() with some fancy formatting.
+ pprint.pprint(vars(opts))
+ sys.exit()
+
+
+def parse_args(args=None):
+ opts = create_parser().parse_args(args)
+ apply_config(opts)
+ finalize_options(opts)
+ return opts
+
+
+def main():
+ opts = parse_args()
+ if opts.verb == 'build':
+ check_inputs(opts)
+ make_uki(opts)
+ elif opts.verb == 'genkey':
+ check_cert_and_keys_nonexistent(opts)
+ generate_keys(opts)
+ elif opts.verb == 'inspect':
+ inspect_sections(opts)
+ else:
+ assert False
+
+
+if __name__ == '__main__':
+ main()