This is a library for the OpenID for Verifiable Credentials (OpenID4VC) specifications family developed by the OpenID Digital Credentials Protocols Working Group.
The Digital Credentials Protocols (DCP) Working Group focuses on creating OpenID specifications for a model where issuers provide digital credentials to holders, allowing holders to present them to verifiers. These digital credentials contain cryptographically signed statements about the holder, and verifiers can check their authenticity. The primary goals include enhancing user control and privacy over identity information, making identity verification more efficient and secure, and establishing a universal approach for identification, authentication, and authorization in both digital and physical spaces.
An overview of all the specifications developed by the OpenID Digital Credentials Protocols Working Group can be found here.
This workspace includes Rust implementations for the following DCP specifications:
| Specification | Description | Version |
|---|---|---|
| OID4VCI | OpenID for Verifiable Credential Issuance 1.0 | OID4VCI 1.0 published: 16 September 2025 |
| OID4VP | OpenID for Verifiable Presentations | OID4VP 1.0 published 9 July 2025 |
| SIOPv2 | Self-Issued OpenID Provider v2 | Working Group Draft 13 published: 28 November 2023 |
For an easy-to-use library that combines all the above specifications, please check out:
See CONTRIBUTING.md for how to set up, test and submit changes.
The architecture is described in docs/DESIGN.md, the feature checklist per specification is docs/FEATURES.md, and design decisions are recorded in docs/adr/.
Coding agents start from AGENTS.md.
To report a vulnerability, see SECURITY.md.
Releases are automated with release-plz: on every push to main it checks which crates changed since their last release and, if any did, opens or updates a release pull request with their next versions and changelogs, derived from the Conventional Commits since that release; merging it publishes those crates to crates.io with a tag and GitHub release each.
docs/RELEASE.md describes the process and the credential setup.