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grub2/grub2-s390x-secure-execution-support.patch

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From 023b569648eece7a7fe2ae38d731185a1f2abeb5 Mon Sep 17 00:00:00 2001
From: Gary Lin <glin@suse.com>
Date: Fri, 23 Aug 2024 09:57:03 +0800
Subject: [PATCH] s390x: add Secure Execution support
To support Secure Execution, 2 extra files and 5 environment variables
are introduced.
- se-parm.conf.in
The template file for the kernel parameter to be used by 'genprotimg'
- se-zipl2grub.conf.in
The template file of zipl.conf for secure execution
- SUSE_S390_SE_ENABLE
The variable to enable s390x Secure Execution
- SUSE_S390_SE_HOST_KEY
The variable to set the file list to the host key documents
- SUSE_S390_SE_HOST_KEY_SIGNING_KEY
The variable to set the file list to the signing key certificates
- SUSE_S390_SE_CA_CERT
The variable to set the file path to the CA certificate
- SUSE_S390_SE_REVOCATION_LIST
The variable to set the file list of the host key revocation lists
When enabling Secure Execution, the zipl initrd is generated in
"/dev/shm/zipl-se" instead of "/boot/zipl" because the zipl initrd
may contain the LUKS key for the encrypted root partition. Then,
'genprotimg' stores the encrypted image, a combination of the zipl
kernel, zipl initrd, and the kernel parameters, as
"/boot/secure-linux-$version". To make the image ready for zipl,
it is copied to "/boot/zipl/secure-linux-$version" and linked to
"/boot/zipl/secure-linux" which is expected by the zipl config.
---
Makefile.util.def | 17 +++
util/s390x/se-parm.conf.in | 1 +
util/s390x/se-zipl2grub.conf.in | 17 +++
util/s390x/zipl2grub.pl.in | 202 ++++++++++++++++++++++++++------
4 files changed, 198 insertions(+), 39 deletions(-)
create mode 100644 util/s390x/se-parm.conf.in
create mode 100644 util/s390x/se-zipl2grub.conf.in
diff --git a/Makefile.util.def b/Makefile.util.def
index ffedea24a..722542933 100644
--- a/Makefile.util.def
+++ b/Makefile.util.def
@@ -796,6 +796,23 @@ data = {
emu_condition = COND_s390x;
};
+data = {
+ name = se-parm.conf.in;
+ common = util/s390x/se-parm.conf.in;
+ installdir = grubconf;
+ enable = emu;
+ emu_condition = COND_s390x;
+};
+
+data = {
+ name = se-zipl2grub.conf.in;
+ common = util/s390x/se-zipl2grub.conf.in;
+ installdir = grubconf;
+ enable = emu;
+ emu_condition = COND_s390x;
+};
+
+
script = {
name = dracut-module-setup.sh;
common = util/s390x/dracut-module-setup.sh.in;
diff --git a/util/s390x/se-parm.conf.in b/util/s390x/se-parm.conf.in
new file mode 100644
index 000000000..63959b753
--- /dev/null
+++ b/util/s390x/se-parm.conf.in
@@ -0,0 +1 @@
+root=@GRUB_DEVICE@ @GRUB_EMU_CONMODE@ @GRUB_CMDLINE_LINUX@ @GRUB_CMDLINE_LINUX_DEFAULT@ initgrub quiet splash=silent plymouth.enable=0
diff --git a/util/s390x/se-zipl2grub.conf.in b/util/s390x/se-zipl2grub.conf.in
new file mode 100644
index 000000000..e9feeb9b6
--- /dev/null
+++ b/util/s390x/se-zipl2grub.conf.in
@@ -0,0 +1,17 @@
+## This is the template for '@zipldir@/config' and is subject to
+## rpm's %config file handling in case of grub2-s390x-emu package update.
+
+[defaultboot]
+defaultmenu = menu
+
+[grub2-secure]
+ target = @zipldir@
+ image = @zipldir@/secure-linux
+
+:menu
+ target = @zipldir@
+ timeout = 60
+ default = 1
+ prompt = 0
+ secure = @SUSE_SECURE_BOOT@
+ 1 = grub2-secure
diff --git a/util/s390x/zipl2grub.pl.in b/util/s390x/zipl2grub.pl.in
index 46b902209..930ecc4cd 100644
--- a/util/s390x/zipl2grub.pl.in
+++ b/util/s390x/zipl2grub.pl.in
@@ -12,10 +12,19 @@ my $definitrd = "/boot/initrd";
my $Image = "$defimage";
my $previous = ".prev";
my $zipldir = "";
+my $imgdir = "";
my $running = "";
my $refresh = 1; # needs to default to "on" until most bugs are shaken out!
my $force = 0;
my $hostonly = 1;
+my $secure_exec = 0;
+my $sehostkey = "";
+my $sesignkey = "";
+my $secacert = "";
+my $serevoke = "";
+my $separm= "";
+my $se_zipconf = '@sysconfdir@/default/se-zipl2grub.conf.in';
+my $se_kernparm = '@sysconfdir@/default/se-parm.conf.in';
my $verbose = 0;
my $debug = 0;
my $miss = 0;
@@ -183,6 +192,55 @@ sub ChkInitrd($$) {
return $found;
}
+sub GenSEImage($$$$) {
+ my( $kernel, $initrd, $parm, $out_image) = @_;
+
+ # genprotimg -i <kernel-image-file> \
+ # -r <initrd-file>> \
+ # -p <parm-file> \
+ # --host-key-document <host-key-doc> \
+ # --cert ibm-z-host-key-signing.crt \
+ # --cert DigiCertCA.crt \
+ # --crl revocation.crl \
+ # -o /boot/zipl/secure-linux
+
+ my @C = ( "genprotimg", "-i", $kernel, "-r", $initrd, "-p", $parm,
+ "--cert", $secacert);
+
+ # Handle the host key document list
+ if ($sehostkey) {
+ my @sehostkey_list = split('[,\s]+', $sehostkey);
+ my $hkd;
+ foreach $hkd (@sehostkey_list) {
+ Panic( 1, "$C: host key document '$hkd' not readable!?\n") unless (-r $hkd);
+ push @C, "--host-key-document", $hkd;
+ }
+ }
+
+ # Handle the signing key list
+ if ($sesignkey) {
+ my @sesignkey_list = split('[,\s]+', $sesignkey);
+ my $signkey;
+ foreach $signkey (@sesignkey_list) {
+ Panic( 1, "$C: signing key '$signkey' not readable!?\n") unless (-r $signkey);
+ push @C, "--cert", $signkey;
+ }
+ }
+
+ # Handle the revocation list files
+ if ($serevoke) {
+ my @serevoke_list = split('[,\s]+', $serevoke);
+ my $crl;
+ foreach $crl (@serevoke_list) {
+ Panic( 1, "$C: revocation list '$crl' not readable!?\n") unless (-r $crl);
+ push @C, "--crl", $crl;
+ }
+ }
+
+ push @C, "-o", "$out_image";
+ System( @C);
+}
+
sub Usage($) {
my @cat = ("",
"Parameter error.",
@@ -401,49 +459,91 @@ if ( $debug && $verbose > 2 ) {
}
}
-open( IN, "< $in") ||
- Panic( 1, "$C: Failed to open 'zipl.conf' template: $!.\n");
-while ( <IN> ) {
- Info( 4, "$.. <$_$.. >");
- if ( $. == 1 && m{^## This} ) {
- $_ = "## This file was written by 'grub2-install/$C'\n" .
- "## filling '$in' as template\n";
- } elsif ( $. == 2 && m{^## rpm's} ) {
- $_ = "## with values from '$default'.\n" .
- "## In-place modifications will eventually go missing!\n";
+#
+# s390x Secure Execution variables
+#
+# SUSE_S390_SE_ENABLE: enabling s390x Secure Execution
+# SUSE_S390_SE_HOST_KEY: the host key
+# SUSE_S390_SE_HOST_KEY_SIGNING_KEY: the signing key of the host key
+# SUSE_S390_SE_CA_CERT: the CA certificate
+# SUSE_S390_SE_REVOCATION_LIST: the revocation list
+#
+if ( -r $C{SUSE_S390_SE_HOST_KEY} && -r $C{SUSE_S390_SE_HOST_KEY_SIGNING_KEY} &&
+ -r $C{SUSE_S390_SE_CA_CERT}) {
+
+ $sehostkey = $C{SUSE_S390_SE_HOST_KEY};
+ $sesignkey = $C{SUSE_S390_SE_HOST_KEY_SIGNING_KEY};
+ $secacert = $C{SUSE_S390_SE_CA_CERT};
+
+ $serevoke = $C{SUSE_S390_SE_REVOCATION_LIST} if $C{SUSE_S390_SE_REVOCATION_LIST};
+
+ if ( $C{SUSE_S390_SE_ENABLE} =~ m{^(yes|true|1)$} ) {
+ $secure_exec = 1;
}
- while ( m{\@([^\@\s]+)\@} ) {
- my $k = $1;
- my $v;
- if ( exists( $C{$k}) ) {
- $v = $C{$k};
- } elsif ( exists( $Mandatory{$k}) ) {
- $v = "$k";
- $miss++;
- } else {
- $v = "";
+}
+
+sub MkConfig($$) {
+ my( $template, $name) = @_;
+ open( IN, "< $template") ||
+ Panic( 1, "$C: Failed to open '$name' template: $!.\n");
+ while ( <IN> ) {
+ Info( 4, "$.. <$_$.. >");
+ if ( $. == 1 && m{^## This} ) {
+ $_ = "## This file was written by 'grub2-install/$C'\n" .
+ "## filling '$template' as template\n";
+ } elsif ( $. == 2 && m{^## rpm's} ) {
+ $_ = "## with values from '$default'.\n" .
+ "## In-place modifications will eventually go missing!\n";
}
- if ($k eq "GRUB_DEVICE") {
- if (($v !~ /^UUID/ && ! -e $v) ||
- (exists( $C{SUSE_REMOVE_LINUX_ROOT_PARAM}) &&
- $C{SUSE_REMOVE_LINUX_ROOT_PARAM} eq "true")) {
- s{root=\@$k\@}{}g;
- next;
+ while ( m{\@([^\@\s]+)\@} ) {
+ my $k = $1;
+ my $v;
+ if ( exists( $C{$k}) ) {
+ $v = $C{$k};
+ } elsif ( exists( $Mandatory{$k}) ) {
+ $v = "$k";
+ $miss++;
+ } else {
+ $v = "";
+ }
+ if ($k eq "GRUB_DEVICE") {
+ if (($v !~ /^UUID/ && ! -e $v) ||
+ (exists( $C{SUSE_REMOVE_LINUX_ROOT_PARAM}) &&
+ $C{SUSE_REMOVE_LINUX_ROOT_PARAM} eq "true")) {
+ s{root=\@$k\@}{}g;
+ next;
+ }
}
+ s{\@$k\@}{$v}g;
}
- s{\@$k\@}{$v}g;
+ Info( 3, $_);
+ $cfg .= $_;
+ }
+ if ( $miss ) {
+ Info( 1, "Partially filled config:\n===\n$cfg===\n");
+ Panic( 1, "$C: '$name' template could not be filled. \n");
}
- Info( 3, $_);
- $cfg .= $_;
}
-if ( $miss ) {
- Info( 1, "Partially filled config:\n===\n$cfg===\n");
- Panic( 1, "$C: 'zipl.conf' template could not be filled. \n");
+
+if ( $secure_exec ) {
+ # create the kernel parameter file
+ MkConfig($se_kernparm, "parm.conf");
+ $separm = $cfg;
+
+ # clean up $cfg to reuse the variable for zipl.conf
+ $cfg = "";
+ MkConfig($se_zipconf, "zipl.conf");
+ $imgdir = "/dev/shm/zipl-se";
+
+ mkdir ($imgdir, 0700) unless (-d $imgdir);
+} else {
+ MkConfig($in, "zipl.conf");
+ $imgdir = $zipldir;
}
# copy out kernel and initrd
-my $ziplimage = "$zipldir/image";
-my $ziplinitrd = "$zipldir/initrd";
+my $ziplimage = "$imgdir/image";
+my $ziplinitrd = "$imgdir/initrd";
if ( ! $running && ! $force ) {
chomp( $running = qx{uname -r});
@@ -478,18 +578,42 @@ my $initrd = "initrd-$version";
$image = "image-$version";
if ( ! -r $ziplimage || ! -r $ziplinitrd || $refresh ) {
- BootCopy( $Image, $image, $zipldir, "image");
- BootCopy( $initrd, $initrd, $zipldir, "initrd")
+ BootCopy( $Image, $image, $imgdir, "image");
+ BootCopy( $initrd, $initrd, $imgdir, "initrd")
if (-r "/boot/$initrd" && ! exists( $fsdev{"/boot"}));
}
-if ( $refresh || ChkInitrd( $zipldir, "initrd") <= 0 ) {
- MkInitrd( $initrd, $zipldir, $version);
+if ( $refresh || ChkInitrd( $imgdir, "initrd") <= 0 ) {
+ MkInitrd( $initrd, $imgdir, $version);
}
-if ( ChkInitrd( $zipldir, "initrd") == 0 ) {
+if ( ChkInitrd( $imgdir, "initrd") == 0 ) {
Info( 0, "$C: dracut does not work as expected! Help needed!\n");
$miss++;
}
+if ( $secure_exec ) {
+ my $seimage = "secure-linux-$version";
+ my $parmconf = "$imgdir/parm.conf";
+ my $bootseimg = "/boot/$seimage";
+
+ # write parm.conf
+ if ( ! $debug ) {
+ open( OUT, "> $parmconf") || die;
+ print( OUT $separm) || die;
+ close( OUT);
+ } else {
+ print( STDERR $separm);
+ }
+
+ # Create the secure-execution image in /boot first
+ GenSEImage( $ziplimage, $ziplinitrd, $parmconf, $bootseimg );
+
+ # check /boot/$seimage
+ Panic( 1, "$C: Secure Image '$bootseimg' not readable!?\n") unless (-r "$bootseimg");
+
+ # copy /boot/$seimage to $zipldir
+ BootCopy($seimage, $seimage, $zipldir, "secure-linux");
+}
+
# write zipl config file
my $ziplconf = "$zipldir/config";
$cfg =~ s{#@}{}g if ( -r "$ziplimage$previous" && -r "$ziplinitrd$previous" );
--
2.43.0
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