easy-rsa を Homebrew, apk, apt, dnf, MacPorts, pacman, zypper, Nix, scoop でインストール

プロジェクトリンク

• ホームページ
• 上流ドキュメント
• パッケージマネージャページ

コマンドとエイリアス

• easyrsa

プロジェクトの歴史

Easy-RSA originated in the OpenVPN ecosystem and still co-exists with OpenVPN development while remaining a separate project. The official README describes current development on the 3.x release cycle and keeps prior 2.x and 1.x lines as release branches for tracking and possible back-porting.

The 3.x documentation describes a portable POSIX shell implementation with OpenSSL as the cryptographic backend. Easy-RSA 3 changed the configuration model from older versions: it can run with built-in defaults and no mandatory config file, while optional settings can come from command-line options, environment variables, or a `vars` file.

The tool's long-lived value is its narrowness. It does not try to be a web CA, enterprise PKI service, or certificate inventory system. It gives OpenVPN and TLS administrators a scriptable way to initialize a `pki` directory, build a CA, import certificate requests, sign client/server/intermediate certificates, revoke certificates, and generate CRLs.

採用の歴史

Easy-RSA became widely packaged because OpenVPN deployments frequently need a local certificate authority. The input source facts show package-manager coverage across Homebrew, Debian, Ubuntu, Fedora/DNF, Arch/pacman, Alpine, openSUSE/zypper, MacPorts, Nix, and Scoop.

That packaging footprint is the adoption story: Easy-RSA is not a flashy standalone application, but it is the small utility administrators expect to find next to OpenVPN in OS package repositories. Homebrew packages the official release tarball from GitHub, and the README points users to GitHub releases or named tags for downloads.

Easy-RSA 3 remains active enough for OpenSSL 3 compatibility concerns to shape branch status. The README marks older 3.0.x and release/2.x branches as not compatible with OpenSSL 3, while master tracks the 3.2.x rolling line.

使われ方

The quickstart flow is the classic CA workflow: run `easyrsa init-pki`, `easyrsa build-ca`, generate a keypair/request on the requesting system, import the request on the CA system, sign it as a client/server/CA type, and move the signed certificate back to the requester.

Operational commands cover revocation and CRL publication (`easyrsa revoke`, `easyrsa gen-crl`), Diffie-Hellman parameter generation, request/certificate inspection, and private-key passphrase changes. The documentation recommends using releases rather than the rolling master branch.

Easy-RSA stores generated CA state in the `pki` directory, including CA certificates, private keys, serial numbers, issued certificates, request files, and revocation data. That makes the package easy to understand and easy to back up, but also puts responsibility for private-key handling on the administrator.

パッケージ好きにとっての重要性

Easy-RSA matters to package nerds because it is a tiny utility with an outsized operational footprint. A single shell script plus OpenSSL became the common path for bootstrapping PKI in OpenVPN environments across many Unix distributions.

It is also a reminder that important packages are not always daemons or libraries. Sometimes the historically important package is a CLI that administrators run only when they provision, rotate, or revoke certificates, then leave untouched for months.

タイムライン

• Pre-3.x: Easy-RSA 1.x and 2.x existed as earlier OpenVPN-era release branches.
• 3.x: Easy-RSA moved to the current POSIX shell/OpenSSL-backed project line with optional `vars` configuration and built-in defaults.
• 2025: Homebrew packages Easy-RSA 3.2.x from official GitHub release tarballs.
• 2026: The official README tracks master as the active 3.2.x rolling development branch and marks older 3.0/2.x/1.x lines as archived or unmaintained.

Related projects

• OpenVPN is the adjacent VPN project and community context in which Easy-RSA is documented and supported.
• OpenSSL is the cryptographic backend used for certificate and key operations.
• X.509 PKI, certificate revocation lists, certificate signing requests, and intermediate CAs are the standards and workflows Easy-RSA automates.

ソース

• https://github.com/OpenVPN/easy-rsa
• https://github.com/OpenVPN/easy-rsa/blob/master/README.quickstart.md
• https://github.com/OpenVPN/easy-rsa/blob/master/doc/EasyRSA-Readme.md
• https://formulae.brew.sh/api/formula/easy-rsa.json