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#!/usr/bin/perl
# cpanel - scripts/fix-cpanel-perl Copyright 2022 cPanel, L.L.C.
# All rights reserved.
# copyright@cpanel.net http://cpanel.net
# This code is subject to the cPanel license. Unauthorized copying is prohibited
package scripts::fixcpanelperl;
use strict;
use warnings;
### Do not add any extra use/require statements here without talking to BC.
###
### This code is used by the installer for fresh install
### its main goal is to bootstrap & repair cPanel Perl
###
### Thus no dependencies should be added to this special script.
### Because this script uses only system perl code,
### the rest of the cPanel code base gets to have nice things!
### and rely on cPanel Perl stack.
use IPC::Open3 ();
use POSIX ();
use constant COLOR_RED => 31;
use constant COLOR_GREEN => 32;
use constant COLOR_YELLOW => 33;
use constant COLOR_GRAY => 37;
use constant UPDATE_SOURCE_DEFAULT => 'httpupdate.cpanel.net';
use constant PKG_VERSION_SOURCE => '11.108';
use constant PKG_DOWNLOADS_DIR => '/usr/local/cpanel/tmp/rpm_downloads';
=pod
=head1 NAME
scripts::fixcpanelperl
=head1 SYNOPSIS
# restore cpanel-perl package when missing
/scripts/fix-cpanel-perl
=head1 DESCRIPTION
This script is used during fresh installation to bootstrap cPanel Perl and install a few
core dependencies packages to run the installation process using cPanel Perl version as early
as possible.
The script can also be used to recover from a catastrophic loss or coruption of the cpanel-perl
packages blocking check_cpanel_pkgs or upcp to recover the system.
This script is automatically invoked if needed when check_cpanel_pkgs cannot run.
=head1 NOTE
The list of Perl packages install by this script should be short.
This script should only use default perl packages install with the system,
no Cpanel packages can be use as part of this script.
=cut
my %shared_install_env = (
LANG => 'C',
LANGUAGE => 'C',
LC_ALL => 'C',
LC_MESSAGES => 'C',
LC_CTYPE => 'C',
);
our %DISTRO_SETUP = (
'centos' => {
name => 'centos',
install_env => {
%shared_install_env,
},
install_cmd => [ '/bin/rpm', '-Uvh', '--force', '--nodeps' ],
template => {
base_url => 'http://%httpupdate%/RPM/%cpanel_major%/%distro_name%/%distro_major%/x86_64',
file_name => '%package%-%version%~el%distro_major%.%arch%.rpm'
},
package_sha512 => 'rpm.sha512', # could use later once pushed to prod sha512
},
'ubuntu' => {
name => 'ubuntu',
install_env => {
%shared_install_env,
DEBIAN_FRONTEND => q[noninteractive],
DEBIAN_PRIORITY => q[critical],
},
install_cmd => [ '/bin/dpkg', '-i', '--force-confnew' ],
template => {
base_url => 'http://%httpupdate%/ubuntu/pool',
base_file_uri => '%package%',
file_name => '%package%_%version%~u%distro_major%_%arch%.deb',
},
package_sha512 => 'sha512',
},
);
our $CPANEL_CONFIG_FILE = '/var/cpanel/cpanel.config';
our $SIG_VALIDATION_CPCONF_KEY = 'signature_validation';
sub colorize_bold {
my ( $color, $msg ) = @_;
return $msg
if !defined $color || -e '/var/cpanel/disable_cpanel_terminal_colors';
$msg ||= '';
return chr(27) . '[1;' . $color . 'm' . $msg . chr(27) . '[0;m';
}
sub DEBUG($) { return _MSG( 'DEBUG', " " . shift ) }
sub ERROR($) {
return _MSG(
colorize_bold( COLOR_RED, 'ERROR' ),
colorize_bold( COLOR_GRAY, shift )
);
}
sub WARN($) {
return _MSG(
colorize_bold( COLOR_YELLOW, 'WARN' ),
colorize_bold( COLOR_YELLOW, shift )
);
}
sub OK($) {
return _MSG(
colorize_bold( COLOR_GREEN, 'OK' ),
colorize_bold( COLOR_GRAY, shift )
);
}
sub INFO($) { return _MSG( 'INFO', shift ) }
sub FATAL($) {
_MSG(
colorize_bold( COLOR_RED, 'FATAL' ),
colorize_bold( COLOR_RED, shift )
);
die "\n";
}
# Cached and used all over the place.
our ( $wget_bin, $wget_args, $GPG_BIN );
our ( $DISTRO_TYPE, $DISTRO_MAJOR );
our $_distro_instance;
my %sha;
exit script(@ARGV) unless caller();
# return the instance of the current distro
sub current_distro {
return $_distro_instance if $_distro_instance;
$DISTRO_TYPE or FATAL("DISTRO_TYPE is not set");
$_distro_instance = $DISTRO_SETUP{$DISTRO_TYPE}
or FATAL("Unknown distro type $DISTRO_TYPE. Cannot bootstrap cpanel-perl");
return $_distro_instance;
}
# init all our global for the scripts
sub _init {
( $wget_bin, $wget_args ) = get_download_tool_binary();
$GPG_BIN = gpg_bin();
( $DISTRO_TYPE, $DISTRO_MAJOR ) = os_info();
# order matters
current_distro() or FATAL("Cannot guess current distro");
return;
}
sub script {
my (@args) = @_;
return 0 if cpanel_perl_is_stable();
loop_protection();
ERROR("Core cpanel-perl modules have been found to be corrupt. Attempting to correct this.") unless $ENV{CPANEL_BASE_INSTALL};
# init globals first, or things will break in a hard to debug way since output is stifled on install
_init();
fetch_and_install_gpg_keys()
unless $ENV{CPANEL_BASE_INSTALL_GPG_KEYS_IMPORTED};
download_pkg_sha512();
chdir(PKG_DOWNLOADS_DIR)
or FATAL( "Fail to chdir to " . PKG_DOWNLOADS_DIR );
my $core_perl_pid;
if ( $core_perl_pid = fork() ) {
# handle just after...
}
elsif ( defined $core_perl_pid ) {
wget_and_validate_file( core_perl_pkg() );
install_packages( core_perl_pkg() ) and exit 1;
exit(0);
}
else {
die "The system failed to fork because of an error: $!";
}
# download package while doing the first transaction
my $pkgs = pkgs_to_download();
foreach my $package_name ( sort keys %$pkgs ) {
wget_and_validate_file( $package_name, $pkgs->{$package_name} );
}
{
waitpid( $core_perl_pid, 0 );
FATAL "Core perl package transaction failed" unless $? == 0;
}
install_packages(%$pkgs);
FATAL "package transaction failed" unless $? == 0;
OK("cpanel-perl is now restored, checking all cpanel packages.");
my @to_cleanup = (
current_distro()->{package_sha512},
current_distro()->{package_sha512} . '.asc',
@{ get_packages_filename( core_perl_pkg() ) },
@{ get_packages_filename(%$pkgs) },
);
cleanup_files(@to_cleanup);
# updatenow.static will do the needful during an install.
return 0 if $ENV{CPANEL_BASE_INSTALL};
# This should be changed to check_cpanel_pkgs at some point
if ( !-x '/usr/local/cpanel/3rdparty/bin/perl' ) {
FATAL "/usr/local/cpanel/3rdparty/bin/perl is missing";
}
if ( !-e '/usr/local/cpanel/scripts/check_cpanel_pkgs' ) {
FATAL "Unable to run scripts/check_cpanel_pkgs. You will need to run updatenow.static and then re-run /usr/local/cpanel/scripts/check_cpanel_pkgs --fix";
}
setup_env_for_distro();
exec(qw{/usr/local/cpanel/3rdparty/bin/perl /usr/local/cpanel/scripts/check_cpanel_pkgs --fix --long-list --no-digest})
or FATAL "Failed to exec /usr/local/cpanel/scripts/check_cpanel_pkgs --fix";
return 255;
}
sub loop_protection {
$ENV{CPANEL_FIX_PERL} = 0 unless defined $ENV{CPANEL_FIX_PERL};
++$ENV{CPANEL_FIX_PERL};
if ( $ENV{CPANEL_FIX_PERL} > 3 ) {
FATAL "$0 was run mulitple times without fixing your system. Aborting. (loop detection)";
return 1;
}
elsif ( $ENV{CPANEL_FIX_PERL} > 1 ) {
WARN( "Running $0 an extra time " . $ENV{CPANEL_FIX_PERL} );
}
return;
}
sub render_filename {
my ( $package, $version_arch ) = @_;
my $filename = current_distro()->{template}->{file_name}
or FATAL("Undefined file_name");
# 3.75-1.cp108.noarch
my ( $v, $arch ) = ( $version_arch =~ m{^(.+)\.([^\.]+)$} );
FATAL("Cannot parse version / arch from $package $version_arch")
unless defined $v && defined $arch;
if ( current_distro()->{name} eq 'ubuntu' ) {
$arch = ( $arch =~ m/86/ ) ? 'amd64' : 'all';
}
return tt(
$filename,
{ package => $package, version => $v, arch => $arch }
);
}
sub render_fileuri {
my ( $package, $version_arch ) = @_;
my $filename = render_filename( $package, $version_arch );
my $uri = ''; # not for all distro
if ( my $base_file_uri = current_distro()->{template}->{base_file_uri} ) {
$uri = tt(
$base_file_uri,
{ package => $package, version_arch => $version_arch }
);
}
$uri .= '/' if defined $uri && length $uri;
$uri .= $filename;
return $uri;
}
sub get_packages_filename {
my @files;
while ( scalar @_ ) {
my $package = shift @_;
my $version_arch = shift @_;
push @files, render_filename( $package, $version_arch );
}
return \@files;
}
sub install_packages {
my (@packages) = @_;
return unless scalar @packages;
my $files = get_packages_filename(@packages);
my @cmd = ( @{ current_distro()->{install_cmd} }, @$files );
DEBUG( "Installing packages: " . join( ' ', @cmd ) );
local %ENV = %ENV;
setup_env_for_distro();
return system(@cmd);
}
sub setup_env_for_distro {
# setup some special environment variables for running the install command
my $env = current_distro()->{install_env};
return unless defined $env && ref $env;
foreach my $k ( keys %$env ) {
$ENV{$k} = $env->{$k};
}
return;
}
sub cleanup_files {
my (@files) = @_;
foreach my $f (@files) {
unlink( PKG_DOWNLOADS_DIR . '/' . $f );
}
return;
}
sub os_info {
my ( $distro_type, $distro_major );
# Trust the Cpanel-OS symlink if it is present. This allows Cache locking to function here.
my $cpanel_os_cache_file = '/var/cpanel/caches/Cpanel-OS';
if ( -l $cpanel_os_cache_file ) {
my @sysinfo = split /\|/, readlink($cpanel_os_cache_file);
( $distro_type, $distro_major ) = @sysinfo[ 1, 2 ];
}
if ( $distro_type && $distro_major ) {
# Got it from cache!
}
elsif ( open( my $fh, "<", "/etc/os-release" ) ) { # everything but CL6 has this file.
my $line; # buffer
while ( $line = <$fh> ) {
if ( index( $line, "ID=" ) == 0 ) {
$distro_type = _clean_value( $line => length("ID=") );
}
elsif ( index( $line, "VERSION_ID=" ) == 0 ) {
$distro_major = _clean_value( $line => length("VERSION_ID=") );
$distro_major =~ s/\..+//; # Strip off .04 from 20.04
}
last if $distro_type && $distro_major;
}
}
elsif ( -e "/etc/redhat-release" ) { # cloudlinux 6
open( my $cr_fh, "<", "/etc/redhat-release" )
or die "Could not open “/etc/redhat-release” for reading: $!\n";
my $line = <$cr_fh>;
($distro_major) = $line =~ m/(\d+)/;
($distro_type) = $line =~ m/^\s*(\w+)/;
$distro_type = lc $distro_type;
}
else {
die("Unable to find /etc/redhat-release or /etc/os-release for system info");
}
$distro_type = 'centos' if $distro_type =~ m/cloud|red|alma|rhel|rocky/i;
($distro_major) = $distro_major =~ m/^\s*0*\s*(\d+)/
if $distro_type eq 'centos'; # Strip off the minor version for centos RPMs. Alma linux is a special snowflake!
return ( $distro_type, $distro_major );
}
sub _clean_value {
my ( $str, $strip ) = @_;
die "Internal _clean_value() called without a value (did you make changes to this code recently?)\n"
if !defined $str;
chomp $str;
$str = substr( $str, $strip );
if ( substr( $str, 0, 1 ) eq '"' ) {
$str = substr( $str, 1, length($str) );
$str = substr( $str, 0, length($str) - 1 );
}
return $str;
}
sub cpanel_perl_is_stable {
my ($pkg_info) = @_;
my $perl_bin = '/usr/local/cpanel/3rdparty/bin/perl';
my $command = $perl_bin;
$command .= " -M$_" foreach minimum_cpanel_perl_modules();
my $got = `$command -E'sub foo (\$bar) { ... }; print q{ok}' 2>&1`; ## no critic qw(Cpanel::ProhibitQxAndBackticks)
return 0 unless !$? && $got && $got eq 'ok';
if ( my $v = _perl_version() ) {
my $out = `$perl_bin -E 'say \$]'`;
return unless $out =~ m{^\Q$v\E};
}
return 1;
}
sub _perl_major {
my ($perl_pkg) = core_perl_pkg();
return $1 if $perl_pkg =~ m{-(\d+)$};
return;
}
sub _perl_version {
my $major = _perl_major() or return;
if ( $major =~ m{^(\d)(\d+)$} ) {
my ( $rev, $version ) = ( $1, $2 );
return sprintf( '%d.%03d', $rev, $version );
}
return;
}
sub download_pkg_sha512 {
# Setup the directory as best we can.
unlink PKG_DOWNLOADS_DIR; # Just in case it's a file (that'd be weird)
system( '/bin/mkdir', '-p', PKG_DOWNLOADS_DIR )
unless -d PKG_DOWNLOADS_DIR;
-d PKG_DOWNLOADS_DIR
or FATAL( "Can't make directory " . PKG_DOWNLOADS_DIR );
my $package_sha512 = current_distro()->{package_sha512}
or FATAL("no package_sha512 filename set");
my $sha_file = sprintf( "%s/%s", PKG_DOWNLOADS_DIR, $package_sha512 );
my $sig_file = sprintf( "%s/%s.asc", PKG_DOWNLOADS_DIR, $package_sha512 );
#
my $sha_url = sprintf( "%s/%s", url_base(), $package_sha512 );
my $sig_url = sprintf( "%s/%s.asc", url_base(), $package_sha512 );
download_file( $sig_url, $sig_file );
download_file( $sha_url, $sha_file );
verify_file_signature( $sha_file, $sig_file, $sha_url );
open( my $fh, '<', $sha_file ) or FATAL("Can't read $sha_file");
while ( my $line = <$fh> ) {
chomp $line;
my ( $sha, $file ) = split( qr{\s+}, $line );
$sha{$file} = $sha;
}
close $fh;
return;
}
my $url_base; #cached;
sub url_base {
return $url_base if defined $url_base;
return $url_base = tt( current_distro()->{template}->{base_url} );
}
sub tt {
my ( $str, $extra ) = @_;
return unless defined $str;
my $httpupdate = get_update_source();
my $cpanel_major = PKG_VERSION_SOURCE;
$extra = {} unless defined $extra;
my $tt = {
httpupdate => $httpupdate,
cpanel_major => $cpanel_major,
distro_name => $DISTRO_TYPE,
distro_major => $DISTRO_MAJOR,
ref $extra ? %$extra : (),
};
my $s = sub {
my $k = shift or FATAL("Undefined key");
my $v = $tt->{$k};
FATAL("Unexpected template variables '$k' in base URL ")
unless defined $v;
return $v;
};
$str =~ s{\%([a-z_]+)\%}{$s->($1)}eg;
return $str;
}
sub get_download_tool_binary {
for my $bin (qw(/bin/wget /usr/bin/wget /usr/local/bin/wget)) {
# check if the binary exists
next unless -e $bin && -x _ && -s _;
# use it
if ( `$bin --version 2>/dev/null` =~ m/GNU\s+Wget\s+[0-9]+\.[0-9]+/ims ) { ## no critic qw(ProhibitQxAndBackticks)
return (
$bin,
' -nv --no-dns-cache --tries=20 --timeout=60 --dns-timeout=60 --read-timeout=30 --waitretry=1 --retry-connrefused -O'
);
}
}
# If $wget_bin is not set, then wget is not installed and
# We do not have a fallback for Cpanel::SecureDownload::fetch_url()
FATAL("Can't bootstrap cpanel-perl without a working file download method. Try installing the wget package manually.");
return;
}
sub gpg_bin {
for my $bin (qw(/bin/gpg /usr/bin/gpg /usr/local/bin/gpg)) {
next unless -e $bin && -x _ && -s _;
return $bin;
}
FATAL "Can't bootstrap cpanel-perl without gpg. Try installing the gnupg2 package manually.";
return;
}
sub _MSG {
my $level = shift;
my $msg = shift || '';
chomp $msg;
my $message_caller_depth = 1;
my ( $sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst ) = localtime;
my ( $package, $filename, $line ) = caller($message_caller_depth);
my $stamp_msg = sprintf(
"%04d-%02d-%02d %02d:%02d:%02d %4s (%5s): %s\n",
$year + 1900, $mon + 1, $mday, $hour, $min,
$sec, $line, $level, $msg
);
print $stamp_msg;
return;
}
{
my $update_source;
sub get_update_source {
return $update_source if defined $update_source;
my $source_file = '/etc/cpsources.conf';
# pull in from cpsources.conf if it's set.
if ( open( my $fh, "<", $source_file ) ) {
while (<$fh>) {
next if $_ !~ m/^\s*HTTPUPDATE\s*=\s*(\S+)/;
$update_source = "$1";
last;
}
}
$update_source = UPDATE_SOURCE_DEFAULT unless $update_source;
INFO("Downloading bootstrap packages from $update_source");
return $update_source;
}
}
sub wget_and_validate_file {
my ( $package_name, $version_arch ) = @_;
my $uri = render_fileuri( $package_name, $version_arch );
my $filename;
if ( index( $uri, '/' ) == -1 ) {
$filename = $uri;
}
else {
($filename) = ( $uri =~ m{/([^/]+)$} );
}
FATAL("Cannot guess filename for path $uri") unless length $filename;
my $url = url_base() . '/' . $uri;
my $expected_sha = $sha{$uri};
FATAL("No sha defined for file $uri") unless defined $expected_sha;
my $pkg_file_path = download_file( $url, PKG_DOWNLOADS_DIR . '/' . $filename );
my $result = `/usr/bin/sha512sum $pkg_file_path 2>&1`; ## no critic qw(Cpanel::ProhibitQxAndBackticks)
my ($sha) = $result =~ m/^([a-fA-F0-9]+)/;
if ( $expected_sha ne $sha ) {
FATAL("Couldn't verify the expected sha ($sha{$filename}) for $filename. Got $sha");
}
return;
}
## used by unit tests - this should be the only 'require' statement
##
sub _require_securedownload {
require Cpanel::SecureDownload;
return;
}
#
# Cpanel::SecureDownload is the preferred method as it will
# attempt Cpanel::HTTP::Client, curl, then wget. And it will
# attempt to use Mozilla::CA if available.
# However, depending on the broken state if perl, it might
# not work. In that case we can go back to directly invoking
# wget via backticks as before.
#
sub attempt_secure_download_file {
my ( $url, $dest_file ) = @_;
# Add this so that Cpanel::SecureDownload will pick up the
# latest version of Mozilla::CA if we have it installed
local @INC = (
'/usr/local/cpanel',
'/usr/local/cpanel/3rdparty/perl/536/cpanel-lib', @INC
);
my ( $success, $msg );
eval {
_require_securedownload();
my %options = (
'output-file' => $dest_file,
'not-verbose' => 1,
'tries' => 20,
'retry-delay' => 1,
'timeout' => 60,
'dns-timeout' => 60,
'read-timeout' => 30,
'no-dns-cache' => 1,
'retry-connrefused' => 1,
);
( $success, $msg ) = Cpanel::SecureDownload::fetch_url( $url, %options );
};
if ( !$@ && $success && -e $dest_file && !-z $dest_file ) {
return 1;
}
# Warn if an exception had been thrown, that means there was trouble loading
# Cpanel::SecureDownload. However, we do not need to warn on errors returned
# from fetch_url as it already warns when each method fails
if ($@) {
WARN "Could not invoke Cpanel::SecureDownload::fetch_url: $@";
}
return;
}
sub minimum_cpanel_perl_modules {
return qw{
common::sense
B::COW
CDB_File
IO::SigGuard
JSON::XS
Compress::Raw::Lzma
Proc::FastSpawn
Try::Tiny
Types::Serialiser
YAML::Syck
Net::SSLeay
IO::Socket::SSL
Guard
Promise::ES6
Promise::XS
Class::XSAccessor
Net::Curl::Promiser
Net::Curl
cPanel::APIClient
Call::Context
Module::Runtime
AnyEvent
JSON
X::Tiny
URI
File::Path::Tiny
Test::Exception
Sub::Uplevel
File::Slurper
PerlIO::utf8_strict
Sereal::Encoder
Sereal::Decoder
IO::Pty
};
}
sub core_perl_pkg {
return ( 'cpanel-perl-536' => '5.36.0-2.cp108.x86_64' );
}
sub pkgs_to_download {
my %packages = qw{
cpanel-perl-536-common-sense 3.75-1.cp108.noarch
cpanel-perl-536-b-cow 0.004-1.cp108.x86_64
cpanel-perl-536-cdb.file 0.99-1.cp108.x86_64
cpanel-perl-536-io-sigguard 0.15-1.cp108.noarch
cpanel-perl-536-json-xs 4.03-1.cp108.x86_64
cpanel-perl-536-compress-raw-lzma 2.201-1.cp108.x86_64
cpanel-perl-536-proc-fastspawn 1.2-1.cp108.x86_64
cpanel-perl-536-try-tiny 0.31-1.cp108.noarch
cpanel-perl-536-types-serialiser 1.01-1.cp108.noarch
cpanel-perl-536-yaml-syck 1.34-1.cp108.x86_64
cpanel-perl-536-net-ssleay 1.92-1.cp108.x86_64
cpanel-perl-536-io-socket-ssl 2.074-1.cp108.noarch
cpanel-perl-536-guard 1.023-1.cp108.x86_64
cpanel-perl-536-promise-es6 0.25-1.cp108.noarch
cpanel-perl-536-promise-xs 0.16-1.cp108.x86_64
cpanel-perl-536-class-xsaccessor 1.19-1.cp108.x86_64
cpanel-perl-536-net-curl-promiser 0.18-1.cp108.noarch
cpanel-perl-536-net-curl 0.50-1.cp108.x86_64
cpanel-perl-536-cpanel-apiclient 0.08-1.cp108.noarch
cpanel-perl-536-call-context 0.03-1.cp108.noarch
cpanel-perl-536-module-runtime 0.016-1.cp108.noarch
cpanel-perl-536-anyevent 7.17-1.cp108.noarch
cpanel-perl-536-json 4.07-1.cp108.noarch
cpanel-perl-536-x-tiny 0.22-1.cp108.noarch
cpanel-perl-536-uri 5.10-1.cp108.noarch
cpanel-perl-536-sub-uplevel 0.2800-1.cp108.noarch
cpanel-perl-536-test-exception 0.43-1.cp108.noarch
cpanel-perl-536-file-path-tiny 1.0-1.cp108.noarch
cpanel-perl-536-file-slurper 0.013-1.cp108.noarch
cpanel-perl-536-perlio-utf8.strict 0.009-1.cp108.x86_64
cpanel-perl-536-sereal-encoder 4.023-1.cp108.x86_64
cpanel-perl-536-sereal-decoder 4.023-1.cp108.x86_64
cpanel-perl-536-io-tty 1.16-1.cp108.x86_64
cpanel-3rdparty-bin 108.1-1.cp108.noarch
};
return \%packages;
}
sub download_file {
my ( $url, $dest_file ) = @_;
DEBUG "Retrieving $url";
# Don't call attempt_secure_download_file on new installs, as Cpanel::SecureDownload will
# not be present on the system at the point where fix-cpanel-perl is called.
if ( !$ENV{'CPANEL_BASE_INSTALL'}
&& attempt_secure_download_file( $url, $dest_file ) ) {
return $dest_file;
}
my $output = `$wget_bin $wget_args '$dest_file' $url 2>&1`; ## no critic qw(Cpanel::ProhibitQxAndBackticks)
if ( !-e $dest_file || -z $dest_file ) {
unlink $dest_file;
FATAL "The system could not fetch $url to file $dest_file: $output";
}
return $dest_file;
}
sub signature_validation_enabled {
my $config = read_config();
return 1 unless defined $config->{$SIG_VALIDATION_CPCONF_KEY};
return 0
if $config->{$SIG_VALIDATION_CPCONF_KEY} eq '0'
|| lc( $config->{$SIG_VALIDATION_CPCONF_KEY} ) eq 'off';
return 1;
}
sub verify_file_signature {
my ( $file, $sig, $url ) = @_;
if ( !signature_validation_enabled() ) {
INFO "Skipping signature validation [currently disabled in cpanel.config]";
return;
}
INFO "FILE - $file";
INFO "SIG - $sig";
INFO "URL - $url";
my @gpg_args = (
'--logger-fd', '1', '--status-fd', '1',
'--homedir', gpg_homedir(), '--verify', $sig,
$file,
);
# Verify the validity of the GPG signature.
# Information on these return values can be found in 'doc/DETAILS' in the GnuPG source.
my ( %notes, $curnote );
my ( $gpg_out, $success, $status );
my $gpg_pid = IPC::Open3::open3( undef, $gpg_out, undef, $GPG_BIN, @gpg_args );
while ( my $line = readline($gpg_out) ) {
if ( $line =~ /^\[GNUPG:\] VALIDSIG ([A-F0-9]+) (\d+-\d+-\d+) (\d+) ([A-F0-9]+) ([A-F0-9]+) ([A-F0-9]+) ([A-F0-9]+) ([A-F0-9]+) ([A-F0-9]+) ([A-F0-9]+)$/ ) {
$status = "Valid signature for $file";
$success = 1;
}
elsif ( $line =~ /^\[GNUPG:\] NOTATION_NAME (.+)$/ ) {
$curnote = $1;
$notes{$curnote} = '';
}
elsif ( $line =~ /^\[GNUPG:\] NOTATION_DATA (.+)$/ ) {
$notes{$curnote} .= $1;
}
elsif ( $line =~ /^\[GNUPG:\] BADSIG ([A-F0-9]+) (.+)$/ ) {
$status = "Invalid signature for $file.";
}
elsif ( $line =~ /^\[GNUPG:\] NO_PUBKEY ([A-F0-9]+)$/ ) {
$status = "Could not find public key in keychain.";
}
elsif ( $line =~ /^\[GNUPG:\] NODATA ([A-F0-9]+)$/ ) {
$status = "Could not find a GnuPG signature in the signature file.";
}
}
waitpid( $gpg_pid, 0 );
$status ||= "Unknown error from gpg.";
$status .= " ($file)";
if ($success) {
INFO $status;
}
else {
FATAL $status;
}
# At this point, the signature should be valid.
# We now need to check to see if the filename signature notation is correct.
my ($url_path) = $url =~ m{^https?://[-.a-zA-Z0-9]+(/.+)};
$url_path or FATAL("Can't parse $url");
if ( defined( $notes{'filename@gpg.notations.cpanel.net'} ) ) {
my $file_note = $notes{'filename@gpg.notations.cpanel.net'};
if ( $file_note ne $url_path ) {
FATAL "Filename notation ($file_note) does not match URL ($url_path).";
}
}
else {
FATAL "Signature does not contain a filename notation.";
}
return;
}
sub fetch_and_install_gpg_keys {
my $pub_keys = public_keys();
_create_gpg_homedir();
INFO("fetch and install gpg keys");
FATAL("gpg bin unset") unless defined $GPG_BIN;
foreach my $key ( @{ keys_to_download() } ) {
INFO("Downloading GPG public key, $pub_keys->{$key}");
my $target = secure_downloads() . $pub_keys->{$key};
my $dest = gpg_homedir() . "/" . $pub_keys->{$key};
my $wget_out = download_file( $target, $dest, 1, 1 );
if ( !-e $dest ) {
WARN("Could not download GPG public key at $target : $wget_out");
return;
}
my $gpg_cmd = $GPG_BIN . " -q --homedir " . gpg_homedir() . " --import " . $dest;
DEBUG($gpg_cmd);
my $out = `$gpg_cmd`; ## no critic qw(ProhibitQxAndBackticks)
ERROR($out) if $? && length $out;
}
return;
}
sub _create_gpg_homedir {
mkdir( gpg_homedir(), 0700 ) if !-e gpg_homedir();
return;
}
our $CACHE_CONFIG;
sub read_config {
my $file = $CPANEL_CONFIG_FILE;
return $CACHE_CONFIG if $CACHE_CONFIG;
my $config = {};
open( my $fh, "<", $file ) or return $config;
while ( my $line = readline $fh ) {
chomp $line;
if ( $line =~ m/^\s*([^=]+?)\s*$/ ) {
my $key = $1 or next; # Skip loading the key if it's undef or 0
$config->{$key} = undef;
}
elsif ( $line =~ m/^\s*([^=]+?)\s*=\s*(.*?)\s*$/ ) {
my $key = $1 or next; # Skip loading the key if it's undef or 0
$config->{$key} = $2;
}
}
$CACHE_CONFIG = $config;
return $config;
}
sub keys_to_download {
my $config = read_config();
my $keyrings = gpg_keyrings();
my $use_key = 'release'; # default key
if ( defined $config->{'signature_validation'}
&& $config->{'signature_validation'} =~ /^Release and (?:Development|Test) Keyrings$/ ) {
$use_key = 'development';
}
my $mirror = get_update_source();
if ( $mirror =~ /^(?:.*\.dev|qa-build|next)\.cpanel\.net$/ ) {
if ( !defined $config->{'signature_validation'} ) {
$use_key = 'development';
}
elsif ( $use_key ne 'development' ) {
WARN("Using cPanel GPG '$use_key' key for mirror $mirror (consider using 'development')");
}
}
FATAL("Unknown key for $use_key") unless defined $keyrings->{$use_key};
WARN("Using cPanel GPG key '$use_key'") if $use_key ne 'release';
return $keyrings->{$use_key};
}
# The installer may set $ENV{'CPANEL_BASE_INSTALL_GPG_KEYS_IMPORTED'}
# to true in which case the keys will be in /var/cpanel/.gpgtmpdir
sub gpg_homedir {
return '/var/cpanel/.gpgtmpdir';
}
sub public_keys {
return {
'release' => 'cPanelPublicKey.asc',
'development' => 'cPanelDevelopmentKey.asc',
};
}
sub secure_downloads {
return 'https://securedownloads.cpanel.net/';
}
sub gpg_keyrings {
return {
'release' => ['release'],
'development' => [ 'release', 'development' ],
};
}
1;