Rekór - Greek for “Record”
Rekor's goals are to provide an immutable tamper resistant ledger of metadata generated within a software projects supply chain. Rekor will enable software maintainers and build systems to record signed metadata to an immutable record. Other parties can then query said metadata to enable them to make informed decisions on trust and non-repudiation of an object's lifecycle. For more details visit the sigstore website.
The Rekor project provides a restful API based server for validation and a transparency log for storage. A CLI application is available to make and verify entries, query the transparency log for inclusion proof, integrity verification of the transparency log or retrieval of entries by either public key or artifact.
Rekor fulfils the signature transparency role of sigstore's software signing infrastructure. However, Rekor can be run on its own and is designed to be extensible to working with different manifest schemas and PKI tooling.
Rekor is officially Generally Available with a 1.0.0 release, and follows semver rules for API stability. This means production workloads can rely on the Rekor public instance, which has a 24/7 oncall rotation supporting it and offers a 99.5% availability SLO for the following API endpoints:
/api/v1/log/api/v1/log/publicKey/api/v1/log/proof/api/v1/log/entries/api/v1/log/entries/retrieve
For uptime data on the Rekor public instance, see https://status.sigstore.dev.
More details on the public instance can be found at docs.sigstore.dev.
The attestation size limit for uploads to the public instance is 100KB. If you need to upload larger files, please run your own instance of Rekor. You can find instructions for doing so in the installation documentation.
Please see the installation page for details on how to install the rekor CLI and set up / run the rekor server
For examples of uploading signatures for all the supported types to rekor, see the types documentation.
Rekor allows customized manifests (which term them as types), type customization is outlined here.
If you're interesting in integration with Rekor, we have an OpenAPI swagger editor
Should you discover any security issues, please refer to sigstore's security process
We welcome contributions from anyone and are especially interested to hear from users of Rekor.