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doc: table of contents and better installation instructions

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README.md
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`agenix` is a commandline tool for managing secrets encrypted with your existing SSH keys. This project also includes the NixOS module `age` for adding encrypted secrets into the Nix store and decrypting them. `agenix` is a commandline tool for managing secrets encrypted with your existing SSH keys. This project also includes the NixOS module `age` for adding encrypted secrets into the Nix store and decrypting them.
## Contents
* [Problem and solution](#problem-and-solution)
* [Features](#features)
* [Installation](#installation)
* [niv](#install-via-niv) (Current recommendation)
* [module](#install-module-via-niv)
* [CLI](#install-cli-via-niv)
* [nix-channel](#install-via-nix-channel)
* [module](#install-module-via-nix-channel)
* [CLI](#install-cli-via-nix-channel)
* [fetchTarball](#install-via-fetchtarball)
* [module](#install-module-via-fetchtarball)
* [CLI](#install-cli-via-fetchTarball)
* [flakes](#install-via-flakes)
* [module](#install-module-via-flakes)
* [CLI](#install-cli-via-flakes)
* [Tutorial](#tutorial)
* [Rekeying](#rekeying)
* [Don't symlink secret](#dont-symlink-secret)
* [Use other implementations](#use-other-implementations)
* [Threat model/Warnings](#threat-modelwarnings)
* [Acknowledgements](#acknowledgements)
## Problem and solution ## Problem and solution
All files in the Nix store are readable by any system user, so it is not a suitable place for including cleartext secrets. Many existing tools (like NixOps deployment.keys) deploy secrets separately from `nixos-rebuild`, making deployment, caching, and auditing more difficult. Out-of-band secret management is also less reproducible. All files in the Nix store are readable by any system user, so it is not a suitable place for including cleartext secrets. Many existing tools (like NixOps deployment.keys) deploy secrets separately from `nixos-rebuild`, making deployment, caching, and auditing more difficult. Out-of-band secret management is also less reproducible.
@ -26,7 +50,12 @@ All files in the Nix store are readable by any system user, so it is not a suita
Choose one of the following methods: Choose one of the following methods:
### [niv](https://github.com/nmattia/niv) (Current recommendation) * [niv](#install-via-niv) (Current recommendation)
* [nix-channel](#install-via-nix-channel)
* [fetchTarball](#install-via-fetchTarball)
* [flakes](#install-via-flakes)
### Install via [niv](https://github.com/nmattia/niv)
First add it to niv: First add it to niv:
@ -34,9 +63,9 @@ First add it to niv:
$ niv add ryantm/agenix $ niv add ryantm/agenix
``` ```
#### Module #### Install module via niv
Then add the following to your configuration.nix in the `imports` list: Then add the following to your `configuration.nix` in the `imports` list:
```nix ```nix
{ {
@ -44,16 +73,28 @@ Then add the following to your configuration.nix in the `imports` list:
} }
``` ```
### nix-channel #### Install CLI via niv
To install the `agenix` binary:
```nix
{
environment.systemPackages = [ (pkgs.callPackage "${(import ./nix/sources.nix).agenix}/pkgs/age.nix" {}) ];
}
```
### Install via nix-channel
As root run: As root run:
```ShellSession ```ShellSession
$ nix-channel --add https://github.com/ryantm/agenix/archive/main.tar.gz agenix $ sudo nix-channel --add https://github.com/ryantm/agenix/archive/main.tar.gz agenix
$ nix-channel --update $ sudo nix-channel --update
``` ```
Then add the following to your configuration.nix in the `imports` list: #### Install module via nix-channel
Then add the following to your `configuration.nix` in the `imports` list:
```nix ```nix
{ {
@ -61,17 +102,19 @@ $ nix-channel --update
} }
``` ```
#### CLI #### Install CLI via nix-channel
To install the `agenix` binary: To install the `agenix` binary:
```nix ```nix
{ {
environment.systemPackages = [ import <agenix> {}.agenix ]; environment.systemPackages = [ (pkgs.callPackage <agenix/pkgs/agenix.nix> {}) ];
} }
``` ```
### fetchTarball ### Install via fetchTarball
#### Install module via fetchTarball
Add the following to your configuration.nix: Add the following to your configuration.nix:
@ -98,9 +141,19 @@ $ nix-channel --update
} }
``` ```
### Flakes #### Install CLI via fetchTarball
#### Module To install the `agenix` binary:
```nix
{
environment.systemPackages = [ (pkgs.callPackage "${builtins.fetchTarball "https://github.com/ryantm/agenix/archive/main.tar.gz"}/pkgs/agenix.nix" {}) ];
}
```
### Install via Flakes
#### Install module via Flakes
```nix ```nix
{ {
@ -122,7 +175,7 @@ $ nix-channel --update
} }
``` ```
#### CLI #### Install CLI via Flakes
You don't need to install it, You don't need to install it,