mirror of
https://github.com/nmasur/dotfiles
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new secrets management system
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19
apps/encrypt-secret.nix
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19
apps/encrypt-secret.nix
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@ -0,0 +1,19 @@
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{ pkgs, ... }: {
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# nix run github:nmasur/dotfiles#encrypt-secret > private/mysecret.age
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type = "app";
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program = builtins.toString (pkgs.writeShellScript "encrypt-secret" ''
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printf "\nEnter the secret data to encrypt for all hosts...\n\n" 1>&2
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read -p "Secret: " secret
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printf "\nEncrypting...\n\n" 1>&2
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tmpfile=$(mktemp)
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echo "''${secret}" > ''${tmpfile}
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${pkgs.age}/bin/age --encrypt --armor --recipients-file ${
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builtins.toString ../hosts/public-keys
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} $tmpfile
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rm $tmpfile
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'');
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}
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27
apps/reencrypt-secrets.nix
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apps/reencrypt-secrets.nix
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{ pkgs, ... }: {
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# nix run github:nmasur/dotfiles#reencrypt-secrets ./private
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type = "app";
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program = builtins.toString (pkgs.writeShellScript "reencrypt-secrets" ''
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if [ $# -eq 0 ]; then
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echo "Must provide directory to reencrypt."
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exit 1
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fi
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encrypted=$1
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for encryptedfile in ''${1}/*; do
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tmpfile=$(mktemp)
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echo "Decrypting ''${encryptedfile}..."
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${pkgs.age}/bin/age --decrypt \
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--identity ~/.ssh/id_ed25519 $encryptedfile > $tmpfile
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echo "Encrypting ''${encryptedfile}..."
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${pkgs.age}/bin/age --encrypt --armor --recipients-file ${
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builtins.toString ../hosts/public-keys
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} $tmpfile > $encryptedfile
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rm $tmpfile
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done
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echo "Finished."
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'');
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}
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@ -92,6 +92,13 @@
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# Load the SSH key for this machine
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# Load the SSH key for this machine
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loadkey = import ./apps/loadkey.nix { inherit pkgs; };
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loadkey = import ./apps/loadkey.nix { inherit pkgs; };
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# Encrypt secret for all machines
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encrypt-secret = import ./apps/encrypt-secret.nix { inherit pkgs; };
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# Re-encrypt secrets for all machines
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reencrypt-secrets =
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import ./apps/reencrypt-secrets.nix { inherit pkgs; };
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# Connect machine metrics to Netdata Cloud
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# Connect machine metrics to Netdata Cloud
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netdata = import ./apps/netdata-cloud.nix { inherit pkgs; };
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netdata = import ./apps/netdata-cloud.nix { inherit pkgs; };
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4
hosts/public-keys
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4
hosts/public-keys
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# Scan hosts: ssh-keyscan -t ed25519 <hostnames>
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ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIB+AbmjGEwITk5CK9y7+Rg27Fokgj9QEjgc9wST6MA3s noah
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ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHVknmPi7sG6ES0G0jcsvebzKGWWaMfJTYgvOue6EULI oracle.masu.rs
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97
modules/services/secrets.nix
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97
modules/services/secrets.nix
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# Secrets management method taken from here:
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# https://xeiaso.net/blog/nixos-encrypted-secrets-2021-01-20
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# In my case, I pre-encrypt my secrets and commit them to git.
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{ config, pkgs, lib, ... }: {
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options = {
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identityFile = lib.mkOption {
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type = lib.types.str;
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description = "Path to existing identity file.";
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default = "/etc/ssh/ssh_host_ed25519_key";
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};
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# secretsDirectory = lib.mkOption {
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# type = lib.types.str;
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# description = "Default path to place secrets.";
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# default = "/var/lib/private";
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# };
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secrets = lib.mkOption {
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type = lib.types.attrsOf (lib.types.submodule {
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options = {
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source = lib.mkOption {
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type = lib.types.path;
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description = "Path to encrypted secret.";
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};
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dest = lib.mkOption {
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type = lib.types.str;
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description = "Resulting path for decrypted secret.";
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};
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owner = lib.mkOption {
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default = "root";
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type = lib.types.str;
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description = "User to own the secret.";
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};
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group = lib.mkOption {
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default = "root";
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type = lib.types.str;
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description = "Group to own the secret.";
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};
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permissions = lib.mkOption {
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default = "0400";
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type = lib.types.str;
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description = "Permissions expressed as octal.";
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};
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};
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});
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description = "Set of secrets to decrypt to disk.";
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default = { };
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};
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};
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config = {
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# Create a default directory to place secrets
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# systemd.tmpfiles.rules = [ "d ${config.secretsDirectory} 0750 root wheel" ];
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# Declare oneshot service to decrypt secret using SSH host key
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# - Requires that the secret is already encrypted for the host
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# - Encrypt secrets: nix run github:nmasur/dotfiles#encrypt-secret
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systemd.services = lib.mapAttrs' (name: attrs: {
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name = "${name}-secret";
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value = {
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description = "Decrypt secret for ${name}";
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wantedBy = [ "multi-user.target" ];
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serviceConfig.Type = "oneshot";
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script = ''
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${pkgs.age}/bin/age --decrypt \
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--identity ${config.identityFile} \
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--output ${attrs.dest} \
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${attrs.source}
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chown '${attrs.owner}':'${attrs.group}' '${attrs.dest}'
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chmod '${attrs.permissions}' '${attrs.dest}'
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'';
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};
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}) config.secrets;
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# Example declaration
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# config.secrets.my-secret = {
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# source = ../../private/my-secret.age;
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# dest = "/var/lib/private/my-secret";
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# owner = "my-app";
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# group = "my-app";
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# permissions = "0440";
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# };
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};
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}
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{ config, pkgs, lib, ... }:
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{ config, pkgs, lib, ... }: {
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let credentialsFile = "/var/lib/private/transmission.json";
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imports = [ ./wireguard.nix ./secrets.nix ];
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in {
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imports = [ ./wireguard.nix ];
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options = {
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options = {
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transmissionServer = lib.mkOption {
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transmissionServer = lib.mkOption {
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@ -33,14 +29,14 @@ in {
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rpc-whitelist = "127.0.0.1,${vpnIp}";
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rpc-whitelist = "127.0.0.1,${vpnIp}";
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rpc-whitelist-enabled = true;
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rpc-whitelist-enabled = true;
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};
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};
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credentialsFile = credentialsFile;
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credentialsFile = config.secrets.transmission.dest;
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};
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};
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# Bind transmission to wireguard namespace
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# Bind transmission to wireguard namespace
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systemd.services.transmission = {
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systemd.services.transmission = {
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bindsTo = [ "netns@${namespace}.service" ];
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bindsTo = [ "netns@${namespace}.service" ];
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requires = [ "network-online.target" ];
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requires = [ "network-online.target" "transmission-secret.service" ];
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after = [ "wireguard-wg0.service" ];
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after = [ "wireguard-wg0.service" "transmission-secret.service" ];
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unitConfig.JoinsNamespaceOf = "netns@${namespace}.service";
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unitConfig.JoinsNamespaceOf = "netns@${namespace}.service";
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serviceConfig.NetworkNamespacePath = "/var/run/netns/${namespace}";
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serviceConfig.NetworkNamespacePath = "/var/run/netns/${namespace}";
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};
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};
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@ -71,21 +67,11 @@ in {
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};
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};
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# Create credentials file for transmission
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# Create credentials file for transmission
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systemd.services.transmission-creds = {
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secrets.transmission = {
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requiredBy = [ "transmission.service" ];
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source = ../../private/transmission.json.age;
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before = [ "transmission.service" ];
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dest = "/var/lib/private/transmission.json";
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serviceConfig = { Type = "oneshot"; };
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owner = "transmission";
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script = ''
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group = "transmission";
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if [ ! -f "${credentialsFile}" ]; then
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mkdir --parents ${builtins.dirOf credentialsFile}
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${pkgs.age}/bin/age --decrypt \
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--identity ${config.identityFile} \
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--output ${credentialsFile} \
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${builtins.toString ../../private/transmission.json.age}
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chown transmission:transmission ${credentialsFile}
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chmod 0700 ${credentialsFile}
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fi
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'';
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};
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};
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};
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};
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@ -1,25 +1,25 @@
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{ config, pkgs, lib, ... }: {
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{ config, pkgs, lib, ... }: {
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options = {
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options = {
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identityFile = lib.mkOption {
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# identityFile = lib.mkOption {
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type = lib.types.str;
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# type = lib.types.str;
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description = "Path to SSH key for age";
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# description = "Path to SSH key for age";
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default = "${config.homePath}/.ssh/id_ed25519";
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# default = "${config.homePath}/.ssh/id_ed25519";
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};
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# };
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};
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};
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config = {
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config = {
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home-manager.users.${config.user}.home.packages = with pkgs; [ age ];
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home-manager.users.${config.user}.home.packages = with pkgs; [ age ];
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system.activationScripts.age.text = ''
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# system.activationScripts.age.text = ''
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if [ ! -f "${config.identityFile}" ]; then
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# if [ ! -f "${config.identityFile}" ]; then
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$DRY_RUN_CMD echo -e \nEnter the seed phrase for your SSH key...\n
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# $DRY_RUN_CMD echo -e \nEnter the seed phrase for your SSH key...\n
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$DRY_RUN_CMD echo -e \nThen press ^D when complete.\n\n
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# $DRY_RUN_CMD echo -e \nThen press ^D when complete.\n\n
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$DRY_RUN_CMD ${pkgs.melt}/bin/melt restore ${config.identityFile}
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# $DRY_RUN_CMD ${pkgs.melt}/bin/melt restore ${config.identityFile}
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$DRY_RUN_CMD chown ${config.user}:wheel ${config.identityFile}*
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# $DRY_RUN_CMD chown ${config.user}:wheel ${config.identityFile}*
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$DRY_RUN_CMD echo -e \n\nContinuing activation.\n\n
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# $DRY_RUN_CMD echo -e \n\nContinuing activation.\n\n
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fi
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# fi
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'';
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# '';
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};
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};
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}
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}
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@ -1,5 +1,10 @@
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age-encryption.org/v1
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-----BEGIN AGE ENCRYPTED FILE-----
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-> ssh-ed25519 MgHaOw PAAWnpc5bJ5S972U+L6YgHpI2a7aqwxWaNZrvQIODVg
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YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IHNzaC1lZDI1NTE5IE1nSGFPdyBSYUU2
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A6zRWD6TmlVb8b5J3gdMf3JAeHIHgUQA3C8PpR8GveQ
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OWp1ZDRLVTJrR1k3SVdXZnRPN3RUNDY5RFM2WEZaTzRmdU1zSWdrCjV1VHpNMG81
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--- xP8vbUGtTlvaZ0K2J0+J0ICoL9gvCbhQg6GxG8ZYCS0
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VHA4LzdsN3FpOUNoTGNlWmlHS3E4dTVvWTVoZHJMSlNYTHMKLT4gc3NoLWVkMjU1
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±7¸½½5åL2céJ¿œÄ€»eÅ,÷ßÝ<C39F>ÉTù°§n$Mó<4D>ýi4þêYßiæ[á!¸Å<C2B8>L%ß(Ði‰§F;‡ù6<C3B9>·¨¡†ã¹ÄÂÍÔŠjO
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MTkgWXlTVU1RIDVjM1JmclgxQThKcU1XQWptWmN0MjlKU1NvMEpwMnYyd3Y4czBT
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RTVkQ0UKc0pOYkRxZldsWnloQnBYMWk1eFU0M3R5SkZVTUYyaldIcENONE1PWVJv
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NAotLS0gclZDQndaREZpZ2Z0R0d0alBPeW1tZFVOVHhSaHNlQTRXdTRoZmFDUFFK
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SQqueOUzTFuhSryWW4Do+NAUcq2YdOtN8gmP5Zcp1oMe/9+JIs6Upjsc3eWn+dSA
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7QwbGlTyd6D0+PLJxHA18Xfgpj5owGeTDtwykFPgdO1BjE8C3KlgzUfN
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-----END AGE ENCRYPTED FILE-----
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