Ubisoft Denuvo dbdata.dll

This project provides a Rust implementation of a DLL (dbdata.dll) that emulates the Ubisoft Denuvo token interface. It is intended for research, reverse engineering, and interoperability purposes.

SecureDLC

SecureDLC was introduced by Ubisoft in the September 11th 2025 patch of Assassin's Creed Shadows. It requires a new type of token called ownershipList that is obtained through Ubisoft APIs with the normal denuvo token and a list of dlcs that the original request token was generated with. The DLL will also try to read the ownership field from the token.ini file if present.

A listof dlcs is also needed to make this ownershipList token work. The list can be specified in the dbdata.ini in this format:

[settings]
dlcs=DLC1,DLC2,DLC3

If this file is not present, the DLL will try to read the dlcs from the upc_r2.ini file.

Usage

1. Build the DLL:

   cargo build --release

   The resulting DLL will be located in target/release/dbdata.dll.

2. Replace the file:

   Place the compiled dbdata.dll in the game files, replacing the real one.

3. Token Handling:

   • On first run, a token_req.txt file will be generated with the token request and appid of the game.
   • Place your token in a file named token.ini in the same directory.
   • The DLL will read the token from this file allowing denuvo to work properly.

Format of token.ini:

[token]
token=<your_token_here>
ownership=<optional_ownership_list_token_here>

Debug logs

• In debug builds, logs are written to a timestamped file (dbdata_<timestamp>.log).

Builds

Builds are available in the releases section of the repository. Nightly builds are also available in the actions section.

Disclaimer

This project is for educational and research purposes only. Use responsibly and respect software licenses.

Thanks

Many thanks to Detanup01 for the help in the reverse engineering of the original DLL. Check out his version of the DLL here