extract password-protected InstallBuilder installer

extract-installbuilder.tcl

#!./tclkit

## prepare runtime environment
proc init {} {
	## mount optional.pak (for tcltwofish)
	set optionalPak installbuilder/paks/optional.pak
	vfs::mk4::Mount $optionalPak $optionalPak -readonly

	## adjust library search path
	set ::auto_path [list $tcl::kitpath/lib/tcl$::tcl_version $tcl::kitpath/lib $tcl::kitpath/libraries $optionalPak/linux-x64 $tcl::kitpath]

	## load packages
	package require maui::util
	package require vfs::cookfs
}

proc extract_metakit {src dst} {
	## mount metakit
	set db [tclKitMkOpen $src]
	vfs::filesystem mount $src [list vfs::mk4::handler $db]
	vfs::RegisterMount $src [list vfs::mk4::Unmount $db]

	## ensure destination directory
	file mkdir $dst

	## read cookfsinfo.txt
	set f [open $src/cookfsinfo.txt]
	gets $f cookfsinfo
	close $f

	## read manifest.txt
	set f [open $src/manifest.txt]
	set manifest [read $f]
	close $f

	## copy project.xml
	file copy -- $src/project.xml $dst

	## copy images/
	file copy -- $src/images $dst

	## unmount metakit
	vfs::filesystem unmount $src

	return [list $cookfsinfo $manifest]
}

proc extract {src password dst} {
	## clean up destination
	file delete -force $dst

	## copy images/ to dst, get manifest, mount cookfs
	lassign [extract_metakit $src $dst] cookfsinfo manifest

	## mount cookfs
	set cookfsHandle [vfs::cookfs::Mount $src $src -readonly {*}$cookfsinfo]

	## prepare decryption
	set payloadinfo [$cookfsHandle getmetadata "installbuilder.payloadinfo"]
	maui::util::m4ZQu $password $payloadinfo

	## copy cookfs content to components/
	set dst $dst/components

	## extract directory/file/link
	foreach {fileName props} $manifest {
		puts "$fileName"

		# directory  mode    mtime  0   {0  0}
		# file       mode    mtime  0  {{0  size} {0 size}}
		# link       target  mtime      {0  0}
		lassign $props type arg mtime
		switch -- $type {
			directory {
				file mkdir $dst/$fileName
				file attributes $dst/$fileName -permissions $arg
			}
			file {
				file mkdir [file dirname $dst/$fileName]
				file copy $src/$fileName $dst/$fileName
				set numParts [llength [lindex $props 4]]
				if {$numParts > 0} {
					set fdst [open $dst/$fileName {WRONLY APPEND BINARY}]
					for {set i 1} {$i < $numParts} {incr i} {
						set fsrc [open $src/${fileName}___bitrockBigFile$i {RDONLY BINARY}]
						fcopy $fsrc $fdst
						close $fsrc
					}
					close $fdst
				}
				file attributes $dst/$fileName -permissions $arg
				file mtime $dst/$fileName $mtime
			}
			link {
				file mkdir [file dirname $dst/$fileName]
				# file link -symbolic $dst/$fileName $arg
				# file mtime $dst/$fileName $mtime
				exec ln -s -- $arg $dst/$fileName
				exec touch -h -t [clock format $mtime -format %Y%m%d%H%M.%S] $dst/$fileName
			}
			default {
				error "not implemented"
			}
		}
	}

	## restore directory mtime
	foreach {fileName props} $manifest {
		lassign $props type arg mtime
		if {$type == "directory"} {
			file mtime $dst/$fileName $mtime
		}
	}

	## unmount cookfs
	vfs::filesystem unmount $src
}

init
extract {*}$argv

get-tclkit.sh

#!/bin/sh
cp installbuilder/paks/linux-x64-noupx.pak tclkit
sed --in-place --null-data --expression='/^if {\[file isfile \[file join \$::tcl::kitpath main.tcl/{s/^./\x1A/}' tclkit
chmod +x tclkit

tclkit-21.9.0