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go

sigstore-go 1.0 is now available

May 12, 2025 · Cody Soyland (GitHub)

We love Go within the Sigstore community, and it’s been our language of choice since we got started. Cosign, Rekor, Fulcio, Policy Controller, and Timestamp Authority are all written in Go, and we’re lucky to have such a vibrant community of Go developers. Cosign was the de-facto Sigstore “client” from the beginning. Originally designed as a container image signing tool, it has become much more, introducing signing with ephemeral keys (with Fulcio), blob signing, attestation support, multi-cloud KMS support, and many more features.

sigstore go clients

sigstore-go verification and signing now in beta

Jun 26, 2024 · Zach Steindler (GitHub)

sigstore-go verification and signing now in beta Recent sigstore-go releases include signing support, as well moving both the verification and signing API from unstable to beta. sigstore-go is used in several open source projects like the SLSA verifier, the GitHub CLI, and Stacklok Minder. Cosign and sigstore-go are similar in that they are both written in Go, but the main differences are that sigstore-go is not a full-fledged CLI, and that it supports the protobuf bundle format.

sigstore go clients

Announcing sigstore-go

Oct 5, 2023 · The Sigstore Technical Steering Committee

Announcing sigstore-go Today we’re excited to announce a new open source library, sigstore-go, that represents the future of Sigstore’s support for the Go programming language. Since the beginning, Sigstore has been primarily written in Go but there has been a gap over the past year or so since we established the Protobufs-based bundle format: the de facto standard client (Cosign) lacks support for it. Cosign-the-library is also heavily focused on OCI use cases, which makes it difficult for library integrators who want to limit their implementations to core sign/verify flows and it also supports a wide variety of verification options, which creates potentially confusing duplication.

sigstore go clients

Verify cosign signatures in go using sigstore/sigstore

Aug 9, 2022 · Fabian Kammel

After integrating cosign into the release process of Constellation’s CLI, I also wanted to improve the supply chain security of our metadata that are used for attestation. Using cosign CLI for signing and verifying blobs or container images is a well documented process. The sigstore/sigstore project is the common go library for all sigstore services and clients and has documented public functions, but I was unable to find examples on how to use them together.

sigstore go golang cosign edgelesssystems