Crypto is a collection of packages used in smallstep products. See:

• step: A zero trust swiss army knife for working with X509, OAuth, JWT, OATH OTP, etc.
• step-ca: A private certificate authority (X.509 & SSH) & ACME server for secure automated certificate management, so you can use TLS everywhere & SSO for SSH.

To add this to a project, just run:

go get go.step.sm/crypto

Package x509util implements utilities to build X.509 certificates based on JSON templates.

Package sshutil implements utilities to build SSH certificates based on JSON templates.

Package keyutil implements utilities to generate cryptographic keys.

Package pemutil implements utilities to parse keys and certificates. It also includes a method to serialize keys, X.509 certificates and certificate requests to PEM.

Package randutil provides methods to generate random strings and salts.

Package tlsutil provides utilities to configure tls client and servers.

Package jose is a wrapper for github.com/go-jose/go-jose/v3 and implements utilities to parse and generate JWT, JWK and JWKSets.

Package x25519 adds support for X25519 keys and the XEdDSA signature scheme.

Package minica implements a simple certificate authority.

Package kms implements interfaces to perform cryptographic operations like signing certificates using cloud-based key management systems, PKCS #11 modules, or just a YubiKey or an ssh-agent. On the cloud it supports:

• Amazon AWS KMS
• Google Cloud Key Management
• Microsoft Azure Key Vault

Package fingerprint provides methods for creating and encoding X.509 certificate, SSH certificate and SSH key fingerprints.

Package tpm provides an abstraction over and utilities for interacting with TPMs. It can be used to retrieve TPM information, retrieve its Endorsement Keys (EK) and associated certificates, create and operate on Attestation Keys (AK), and create and operate on (attested) application keys. The storage subpackage provides an interface and concrete implementations offering a transparent persistence mechanism for Attestation and application keys.

Package fipsutil reports whether the cryptography libraries are operating in FIPS 140-3 mode.