age-plugin-1p

1Password Plugin for age

age-plugin-1p is a plugin for age clients like age and rage which allows you to use SSH keys stored inside 1Password.

Differences with age-plugin-op

• Uses SSH public keys (e.g. ssh-ed25519 AAAAC3N...) as age recipients
• Does not require the plugin or 1Password for encryption
• Supports decryption without identity files (age --decrypt -j 1p)

Requirements

• 1Password CLI
• An age client such as age or rage

Testing

To use age-plugin-1p without installation, you can run age through Nix to provide the plugin:

$ nix run github:Enzime/age-plugin-1p#age

The actual plugin is available as:

$ nix run github:Enzime/age-plugin-1p

Or you can enter a shell environment that provides both age and age-plugin-1p:

$ nix shell github:Enzime/age-plugin-1p

Installation

You can build the age-plugin-1p binary using Nix:

$ nix build github:Enzime/age-plugin-1p

Which can then be copied or symlinked to your PATH

Usage

1. List all the public keys in OpenSSH's authorized_key format:

$ age-plugin-1p --print-recipients
op://Personal/SSH key/public key: ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINKZfejb9htpSB5K9p0RuEowErkba2BMKaze93ZVkQIE

1. Encrypt file with SSH public key:

$ echo 'Hello, world!' | age -r "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINKZfejb9htpSB5K9p0RuEowErkba2BMKaze93ZVkQIE" -o secret.age

You can replace the recipient with "$(op read "op://Personal/SSH key/public key")" when encrypting files for yourself.

1. Decrypt file with 1Password:

age-plugin-1p can automatically find the correct SSH key for decryption if you specify -j 1p:

$ age --decrypt -j 1p -o - secret.age
Hello, world!

Supported SSH Key Types

Only Ed25519 and RSA keys are supported since these are the only types supported by 1Password and age.

Inspiration

This plugin is a spiritual successor of age-plugin-op, where it shares a little code, however the majority of code comes from age-plugin-tpm as it uses the new experimental plugin framework.