LaunchDarkly uses the SLSA framework (Supply-chain Levels for Software Artifacts) to help developers make their supply chain more secure by ensuring the authenticity and build integrity of our published SDK packages.
As part of SLSA requirements for level 3 compliance, LaunchDarkly publishes provenance about our SDK package builds using GitHub's generic SLSA3 provenance generator for distribution alongside our packages. These attestations are available for download from the GitHub release page for the release version under Assets > OSNAME-multiple-provenance.intoto.jsonl.
To verify SLSA provenance attestations, we recommend using slsa-verifier. Example usage for verifying SDK packages for Linux is included below:
# Ensure provenance file is downloaded along with packages for your OS
$ ls /tmp/launchdarkly-cpp-client-3.4.0
linux-gcc-x64-dynamic.zip linux-gcc-x64-static.zip linux-multiple-provenance.intoto.jsonl
# Run slsa-verifier to verify provenance against package artifacts
$ slsa-verifier verify-artifact \
--provenance-path linux-multiple-provenance.intoto.jsonl \
--source-uri github.com/launchdarkly/cpp-sdks \
linux-gcc-x64-static.zip linux-gcc-x64-dynamic.zip
Verified signature against tlog entry index 59501683 at URL: https://rekor.sigstore.dev/api/v1/log/entries/24296fb24b8ad77ad75383b2cf5388a2587a27acf06c948205b60999c208ae5fcbe89fae6a6aae70
Verified build using builder "https://github.com/slsa-framework/slsa-github-generator/.github/workflows/generator_generic_slsa3.yml@refs/tags/v1.7.0" at commit 533d512ccf050e6bf50078d64ec97338dc03aaef
Verifying artifact linux-gcc-x64-static.zip: PASSED
Verified signature against tlog entry index 59501683 at URL: https://rekor.sigstore.dev/api/v1/log/entries/24296fb24b8ad77ad75383b2cf5388a2587a27acf06c948205b60999c208ae5fcbe89fae6a6aae70
Verified build using builder "https://github.com/slsa-framework/slsa-github-generator/.github/workflows/generator_generic_slsa3.yml@refs/tags/v1.7.0" at commit 533d512ccf050e6bf50078d64ec97338dc03aaef
Verifying artifact linux-gcc-x64-dynamic.zip: PASSED
PASSED: Verified SLSA provenance
Alternatively, to verify the provenance manually, the SLSA framework specifies recommendations for verifying build artifacts in their documentation.
Note: These instructions do not apply when building our SDKs from source.