A tool to generate vfdecrypt key to decrypt iOS filesystems.
genpass -p <platform> -r <ramdisk.dmg> -f <filesystem.dmg>
platform:s5l8900x(for iPhone1,1; iPhone1,2; iPod1,1)s5l8720x(for iPod2,1)s5l8920x(for iPhone2,1)s5l8922x(for iPod3,1)s5l8930x(for iPhone3,1; iPad1,1; iPod4,1; AppleTV2,1)
ramdisk.dmg: a decrypted restore or update ramdisk from the IPSW with the target filesystemfilesystem.dmg: the encrypted filesystem you're trying to discover the vfdecrypt key for