OSS Rebuild is an initiative by Google designed to enhance the security of open-source package ecosystems and mitigate software supply chain attacks. The project focuses on creating build provenance for packages in established registries like Python Package Index, npm, and Crates.io, with plans to expand further. By utilizing automated methods and heuristics, OSS Rebuild generates trustworthy security metadata, allowing users to validate and ensure the integrity of packages. It also provides manual build specifications when automation cannot fully reproduce packages and helps detect various supply chain compromises, thus contributing to stronger software security.
OSS Rebuild provides build provenance for various package registries, aiming to enhance security by verifying package origins and ensuring no tampering has occurred.
Automation and heuristics are utilized to create a build definition for target packages, allowing for comparison with existing artifacts to ensure consistency and security.
The initiative aids in identifying supply chain compromises, including discrepancies in published packages and suspicious build activities, helping maintain software integrity.
Google's OSS Rebuild publishes build definitions and outcomes via SLSA Provenance, enabling users to verify package origins and repeat the build process with confidence.
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