nix-super/src/nix/key-generate-secret.md

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Examples

• Generate a new secret key:

  # nix key generate-secret --key-name cache.example.org-1 > ./secret-key
  

  We can then use this key to sign the closure of the Hello package:

  # nix build nixpkgs#hello
  # nix store sign --key-file ./secret-key --recursive ./result
  

  Finally, we can verify the store paths using the corresponding public key:

  # nix store verify --trusted-public-keys $(nix key convert-secret-to-public < ./secret-key) ./result
  

Description

This command generates a new Ed25519 secret key for signing store paths and prints it on standard output. Use nix key convert-secret-to-public to get the corresponding public key for verifying signed store paths.

The mandatory argument --key-name specifies a key name (such as cache.example.org-1). It is used to look up keys on the client when it verifies signatures. It can be anything, but it’s suggested to use the host name of your cache (e.g. cache.example.org) with a suffix denoting the number of the key (to be incremented every time you need to revoke a key).

Format

Both secret and public keys are represented as the key name followed by a base-64 encoding of the Ed25519 key data, e.g.

cache.example.org-0:E7lAO+MsPwTFfPXsdPtW8GKui/5ho4KQHVcAGnX+Tti1V4dUxoVoqLyWJ4YESuZJwQ67GVIksDt47og+tPVUZw==

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