widevine-l3-decryptor

It's a part of the browser. It's not doing it with Javascript if that's what you're asking. Chrome includes a file with the name widevinecdm.dll or something like that on Windows. No one knows exactly what this file does because it is incredibly obfuscated https://github.com/tomer8007/widevine-l3-decryptor/wiki/Reve.... But presumably that implements this functionality. As for what Widevine actually does, it just uses a protobuf based protocol to request a decryption key from a license server. License request messages from the client have to be signed with a valid device private key, which are made difficult to extract but some occasionally leak.

Not just privately either, there have been tools circulating even on GitHub. For a L3 example there's one repo [1] that's kind of still up but not really. Still enough to show that it happened. L1 bypass has also been on GitHub briefly. However these things get deleted rather fast for obvious reasons. -- [1] https://github.com/tomer8007/widevine-l3-decryptor

Widevine has been broken at least a few times, including by recovering the private key from its white-box implementation: https://github.com/tomer8007/widevine-l3-decryptor/wiki/Reve.... Note that the write-up says it was the "old" version, but that's relative to the date of the write-up. Google overhauled Widevine after he broke it. I'm less familiar with shielding data like this, but historically things like VMProtect and Themida were the standard for shielding programs. These offer a degree of resistance to automation, but a determined human will eventually figure them out, and then automation usually follows anyway. Syntia did this for VMProtect and Themida: https://www.usenix.org/system/files/conference/usenixsecurit.... Edit: A quick search points to Widevine continuing to have issues. Two more recent write-ups: 1. https://i.blackha

There's code for the L3, but it doesn't work since end of may because the new RSA keys aren't public https://github.com/tomer8007/widevine-l3-decryptor Find the code in the forks, since it was DMCA'd There's none for L1 and L2 though

Looks like someone missed the most recent forks. There are still a number of repos not listed in the DMCA complaint that have the extension content: https://github.com/tomer8007/widevine-l3-decryptor/network/m...