spotter
8th September 2026, 15:49
a little clickbaity title, but at least one strain of "screenpass" style obfuscated protections are using javapathfinder (i.e. NASA) libraries which basically allow one to write java code that gets interrpeted bytecode by bytecode in an in jvm bytecode vm (i.e. the java classes themselves have an interpreter that reads the bytecode, bytecode by bytecode and interpreting it independent of the jvm.
they include the class objects in an obfuscated manner in the java directory, unobfuscate the objects into real CAFEBABE objects and then internally load and interpret the bytecode.
So for example in on example I'm dealing with, it has the correct playlists visible plainly in an array and just does a read on the m2ts file to ensure the aacs flag is set on all blocks (i.e. still encrypted) to validate and release the correct playlist array.
It's like they reinvented the bd+ protection, without I guess paying for the rights to use bd+ (though bd+ is capable of more).
So for example, since it only depends on the encrypted content of the disc, the protection doesn't protect anything if one uses an encrypted iso and a proper keydb (and have tested it as such on vlc)
they include the class objects in an obfuscated manner in the java directory, unobfuscate the objects into real CAFEBABE objects and then internally load and interpret the bytecode.
So for example in on example I'm dealing with, it has the correct playlists visible plainly in an array and just does a read on the m2ts file to ensure the aacs flag is set on all blocks (i.e. still encrypted) to validate and release the correct playlist array.
It's like they reinvented the bd+ protection, without I guess paying for the rights to use bd+ (though bd+ is capable of more).
So for example, since it only depends on the encrypted content of the disc, the protection doesn't protect anything if one uses an encrypted iso and a proper keydb (and have tested it as such on vlc)