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 > multiple.intoto.jsonl.
To verify SLSA provenance attestations, we recommend using slsa-verifier. Example usage for verifying a package is included below:
# Set the version of the library to verify
VERSION=1.0.0
# Download package from PyPi
$ pip download --only-binary=:all: launchdarkly-server-sdk-otel==${VERSION}
# Download provenance from Github release into same directory
$ curl --location -O \
https://github.com/launchdarkly/python-server-sdk-otel/releases/download/${VERSION}/multiple.intoto.jsonl
# Run slsa-verifier to verify provenance against package artifacts
$ slsa-verifier verify-artifact \
--provenance-path multiple.intoto.jsonl \
--source-uri github.com/launchdarkly/python-server-sdk-otel \
launchdarkly_server_sdk_otel-${VERSION}-py3-none-any.whl
Below is a sample of expected output.
Verified signature against tlog entry index 89939519 at URL: https://rekor.sigstore.dev/api/v1/log/entries/24296fb24b8ad77abb8d2f681b007c76a4fe9f89cd9574918683ac8bc87cd6834c5baa479ae5cb98
Verified build using builder "https://github.com/slsa-framework/slsa-github-generator/.github/workflows/generator_generic_slsa3.yml@refs/tags/v1.10.0" at commit 984fc268df29918b03f51f2507146f66d8668d03
Verifying artifact launchdarkly_server_sdk_otel-1.0.0-py3-none-any.whl: 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 libraries from source.