step-ca

step-ca is an online certificate authority for secure, automated certificate management for DevOps. It's the server counterpart to the step CLI tool for working with certificates and keys. Both projects are maintained by Smallstep Labs.

You can use step-ca to:

• Issue HTTPS server and client certificates that work in browsers (RFC5280 and CA/Browser Forum compliance)
• Issue TLS certificates for DevOps: VMs, containers, APIs, database connections, Kubernetes pods...
• Issue SSH certificates:
  • For people, in exchange for single sign-on identity tokens
  • For hosts, in exchange for cloud instance identity documents
• Easily automate certificate management:
  • It's an ACME server that supports all popular ACME challenge types
  • It comes with a Go wrapper
  • ... and there's a command-line client you can use in scripts!

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Comparison with Smallstep's commercial product

step-ca is optimized for a two-tier PKI serving common DevOps use cases.

As you design your PKI, if you need any of the following, consider our commercial CA:

• Multiple certificate authorities
• Active revocation (CRL, OCSP)
• Turnkey high-volume, high availability CA
• An API for seamless IaC management of your PKI
• Integrated support for SCEP & NDES, for migrating from legacy Active Directory Certificate Services deployments
• Device identity — cross-platform device inventory and attestation using Secure Enclave & TPM 2.0
• Highly automated PKI — managed certificate renewal, monitoring, TPM-based attested enrollment
• Seamless client deployments of EAP-TLS Wi-Fi, VPN, SSH, and browser certificates
• Jamf, Intune, or other MDM for root distribution and client enrollment
• Web Admin UI — history, issuance, and metrics
• ACME External Account Binding (EAB)
• Deep integration with an identity provider
• Fine-grained, role-based access control
• FIPS-compliant software
• HSM-bound private keys

See our full feature comparison for more.

You can start a free trial or set up a call with us to learn more.

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Questions? Find us in Discussions or Join our Discord.

Website | Documentation | Installation | Contributor's Guide

Features

🦾 A fast, stable, flexible private CA

Setting up a public key infrastructure (PKI) is out of reach for many small teams. step-ca makes it easier.

• Choose key types (RSA, ECDSA, EdDSA) and lifetimes to suit your needs
• Short-lived certificates with automated enrollment, renewal, and passive revocation
• Can operate as an online intermediate CA for an existing root CA
• Badger, BoltDB, Postgres, and MySQL database backends

⚙️ Many ways to automate

There are several ways to authorize a request with the CA and establish a chain of trust that suits your flow.

You can issue certificates in exchange for:

• ACME challenge responses from any ACMEv2 client
• OAuth OIDC single sign-on tokens, eg:
  • ID tokens from Okta, GSuite, Azure AD, Auth0.
  • ID tokens from an OAuth OIDC service that you host, like Keycloak or Dex
• Cloud instance identity documents, for VMs on AWS, GCP, and Azure
• Single-use, short-lived JWK tokens issued by your CD tool — Puppet, Chef, Ansible, Terraform, etc.
• A trusted X.509 certificate (X5C provisioner)
• A host certificate from your Nebula network
• A SCEP challenge (SCEP provisioner)
• An SSH host certificates needing renewal (the SSHPOP provisioner)
• Learn more in our provisioner documentation

🏔 Your own private ACME server

ACME is the protocol used by Let's Encrypt to automate the issuance of HTTPS certificates. It's super easy to issue certificates to any ACMEv2 (RFC8555) client.

This is the beginning of the README. Read the rest at the original. Read the full README ↗