git.delta.rocks / jrsonnet / refs/commits / 67bf612dbfd3

--- a/Cargo.lock
+++ b/Cargo.lock
@@ -808,10 +808,12 @@
 dependencies = [
  "age",
  "anyhow",
+ "base64 0.22.1",
  "clap",
  "ed25519-dalek",
  "fleet-shared",
  "rand",
+ "x25519-dalek",
 ]
 
 [[package]]

--- a/cmds/fleet/src/cmds/secrets/mod.rs
+++ b/cmds/fleet/src/cmds/secrets/mod.rs
@@ -40,9 +40,6 @@
 		/// Secret public part
 		#[clap(long)]
 		public: Option<String>,
-		/// How to name public secret part
-		#[clap(long, default_value = "public")]
-		public_name: String,
 		/// Load public part from specified file
 		#[clap(long)]
 		public_file: Option<PathBuf>,
@@ -55,14 +52,19 @@
 		#[clap(long)]
 		re_add: bool,
 
-		#[clap(default_value = "secret")]
-		part_name: String,
+		/// How to name public secret part
+		#[clap(long, short = 'p', default_value = "public")]
+		public_part: String,
+		/// How to name private secret part
+		#[clap(short = 's', long, default_value = "secret")]
+		part: String,
 	},
 	/// Add secret, data should be provided in stdin
 	Add {
 		/// Secret name
 		name: String,
-		/// Secret owners
+		/// Secret owner
+		#[clap(short = 'm', long)]
 		machine: String,
 		/// Override secret if already present
 		#[clap(long)]
@@ -70,41 +72,41 @@
 		/// Secret public part
 		#[clap(long)]
 		public: Option<String>,
-		/// How to name public secret part
-		#[clap(long, default_value = "public")]
-		public_name: String,
 		/// Load public part from specified file
 		#[clap(long)]
 		public_file: Option<PathBuf>,
 
-		#[clap(default_value = "secret")]
-		part_name: String,
+		/// How to name public secret part
+		#[clap(short = 'p', long, default_value = "public")]
+		public_part: String,
+		/// How to name private secret part
+		#[clap(short = 's', long, default_value = "secret")]
+		part: String,
 	},
 	/// Read secret from remote host, requires sudo on said host
 	Read {
 		name: String,
+		#[clap(short = 'm', long)]
 		machine: String,
 
-		#[clap(default_value = "secret")]
-		part_name: String,
+		/// Which private secret part to read
+		#[clap(short = 'p', long, default_value = "secret")]
+		part: String,
 	},
 	UpdateShared {
 		name: String,
 
-		#[clap(long)]
-		machines: Option<Vec<String>>,
+		#[clap(short = 'm', long)]
+		machine: Option<Vec<String>>,
 
 		#[clap(long)]
-		add_machines: Vec<String>,
+		add_machine: Vec<String>,
 		#[clap(long)]
-		remove_machines: Vec<String>,
+		remove_machine: Vec<String>,
 
 		/// Which host should we use to decrypt
 		#[clap(long)]
 		prefer_identities: Vec<String>,
-
-		#[clap(default_value = "secret")]
-		part_name: String,
 	},
 	Regenerate {
 		/// Which host should we use to decrypt, in case if reencryption is required, without
@@ -115,13 +117,15 @@
 	List {},
 	Edit {
 		name: String,
+		#[clap(short = 'm', long)]
 		machine: String,
-
-		#[clap(default_value = "secret")]
-		part: String,
 
 		#[clap(long)]
 		add: bool,
+
+		/// Which private secret part to read
+		#[clap(short = 'p', long, default_value = "secret")]
+		part: String,
 	},
 }
 
@@ -220,21 +224,18 @@
 	};
 	let on_pkgs = host.pkgs().await?;
 	let call_package = nix_go!(on_pkgs.callPackage);
-	let mk_encrypt_secret = nix_go!(on_pkgs.mkEncryptSecret);
+	let mk_secret_generators = nix_go!(on_pkgs.mkSecretGenerators);
 
 	let mut recipients = Vec::new();
 	for owner in owners {
 		let key = config.key(owner).await?;
 		recipients.push(key);
 	}
-	let encrypt = nix_go!(mk_encrypt_secret(Obj {
+	let generators = nix_go!(mk_secret_generators(Obj {
 		recipients: { recipients },
 	}));
 
-	let generator = nix_go!(call_package(generator)(Obj {
-		encrypt,
-		// rustfmt_please_newline
-	}));
+	let generator = nix_go!(call_package(generator)(generators));
 
 	let generator = generator.build().await?;
 	let generator = generator
@@ -305,6 +306,7 @@
 	}
 	let default_pkgs = &config.default_pkgs;
 	let default_call_package = nix_go!(default_pkgs.callPackage);
+	let default_mk_secret_generators = nix_go!(default_pkgs.mkSecretGenerators);
 	// Generators provide additional information in passthru, to access
 	// passthru we should call generator, but information about where this generator is supposed to build
 	// is located in passthru... Thus evaluating generator on host.
@@ -313,10 +315,10 @@
 	//
 	// I don't want to make modules always responsible for additional secret data anyway,
 	// so it should be in derivation, and not in the secret data itself.
-	let default_generator = nix_go!(default_call_package(generator)(Obj {
-		encrypt: { "exit 1" },
-		// rustfmt_please_newline
+	let generators = nix_go!(default_mk_secret_generators(Obj {
+		recipients: { <Vec<String>>::new() },
 	}));
+	let default_generator = nix_go!(default_call_package(generator)(generators));
 
 	let kind: GeneratorKind = nix_go_json!(default_generator.generatorKind);
 
@@ -442,11 +444,11 @@
 				name,
 				force,
 				public,
-				public_name,
+				public_part: public_name,
 				public_file,
 				expires_at,
 				re_add,
-				part_name,
+				part: part_name,
 			} => {
 				// TODO: Forbid updating secrets with set expectedOwners (= not user-managed).
 
@@ -500,9 +502,9 @@
 				name,
 				force,
 				public,
-				public_name,
+				public_part: public_name,
 				public_file,
-				part_name,
+				part: part_name,
 			} => {
 				if config.has_secret(&machine, &name) && !force {
 					bail!("secret already defined");
@@ -535,7 +537,7 @@
 			Secret::Read {
 				name,
 				machine,
-				part_name,
+				part: part_name,
 			} => {
 				let secret = config.host_secret(&machine, &name)?;
 				let Some(secret) = secret.parts.get(&part_name) else {
@@ -552,25 +554,24 @@
 			}
 			Secret::UpdateShared {
 				name,
-				machines,
-				add_machines,
-				remove_machines,
+				machine,
+				add_machine,
+				remove_machine,
 				prefer_identities,
-				part_name,
 			} => {
 				// TODO: Forbid updating secrets with set expectedOwners (= not user-managed).
 
 				let secret = config.shared_secret(&name)?;
-				if secret.secret.parts.get(&part_name).is_none() {
+				if secret.secret.parts.values().all(|v| !v.raw.encrypted) {
 					bail!("no secret");
 				}
 
 				let initial_machines = secret.owners.clone();
 				let target_machines = parse_machines(
 					initial_machines.clone(),
-					machines,
-					add_machines,
-					remove_machines,
+					machine,
+					add_machine,
+					remove_machine,
 				)?;
 
 				if target_machines.is_empty() {

--- a/cmds/fleet/src/host.rs
+++ b/cmds/fleet/src/host.rs
@@ -95,7 +95,7 @@
 		let out = cmd.run_string().await?;
 		let mut lines = out.split('\n');
 		if let Some(last) = lines.next_back() {
-			ensure!(last == "", "output of ls should end with newline");
+			ensure!(last.is_empty(), "output of ls should end with newline");
 		}
 		Ok(lines.map(ToOwned::to_owned).collect())
 	}

--- a/cmds/generator-helper/Cargo.toml
+++ b/cmds/generator-helper/Cargo.toml
@@ -6,7 +6,9 @@
 [dependencies]
 age.workspace = true
 anyhow.workspace = true
+base64 = "0.22.1"
 clap.workspace = true
 ed25519-dalek = { version = "2.1", features = ["rand_core"] }
 fleet-shared.workspace = true
 rand = "0.8.5"
+x25519-dalek = "2.0.1"

--- a/cmds/generator-helper/src/main.rs
+++ b/cmds/generator-helper/src/main.rs
@@ -1,52 +1,161 @@
 use std::{
-	fs,
-	io::{self, stdout, Cursor, Read, Write},
-	path::PathBuf,
+	env,
+	fs::{File, OpenOptions},
+	io::{copy, Read, Write},
 	str::FromStr,
 };
 
-use age::Recipient;
+use age::{
+	ssh::{ParseRecipientKeyError, Recipient as SshRecipient},
+	Encryptor, Recipient,
+};
 use anyhow::{anyhow, bail, ensure, Context, Result};
-use clap::Parser;
-use ed25519_dalek::SigningKey;
+use clap::{Parser, ValueEnum};
 use fleet_shared::SecretData;
 use rand::{
 	distributions::{Alphanumeric, DistString, Distribution, Uniform},
-	rngs::OsRng,
-	thread_rng, Rng,
+	thread_rng,
 };
 
-fn write_output(out: &str, data: impl AsRef<[u8]>, stdout_marker: &mut bool) -> Result<()> {
-	let data = data.as_ref();
-	if out == "-" {
-		let mut stdout = stdout();
-		if *stdout_marker {
-			stdout.write_all(&[b'\n'])?;
+fn write_output_file(out: &str) -> Result<File> {
+	let file = OpenOptions::new()
+		.create_new(true)
+		.write(true)
+		.open(out)
+		.with_context(|| format!("failed to open output {out:?}"))?;
+	Ok(file)
+}
+fn write_public(out: &str, mut input: impl Read, encoding: OutputEncoding) -> Result<()> {
+	let mut output = write_output_file(out)?;
+
+	let mut data = Vec::new();
+	copy(&mut input, &mut wrap_encoder(&mut data, encoding))?;
+
+	output.write_all(
+		SecretData {
+			data,
+			encrypted: false,
 		}
-		*stdout_marker = true;
-		stdout.write_all(data)?;
-	} else {
-		fs::write(out, data)?;
+		.to_string()
+		.as_bytes(),
+	)?;
+	Ok(())
+}
+fn write_private(
+	identities: &Identities,
+	out: &str,
+	mut input: impl Read,
+	encoding: OutputEncoding,
+) -> Result<()> {
+	let mut output = write_output_file(out)?;
+	let encryptor = make_encryptor(identities)?;
+
+	let mut data = Vec::new();
+	{
+		let mut encrypted_writer = encryptor.wrap_output(&mut data)?;
+		copy(
+			&mut input,
+			&mut wrap_encoder(&mut encrypted_writer, encoding),
+		)?;
+		encrypted_writer.finish()?;
 	};
+
+	output.write_all(
+		SecretData {
+			data,
+			encrypted: true,
+		}
+		.to_string()
+		.as_bytes(),
+	)?;
 	Ok(())
 }
 
+type Identities = Vec<SshRecipient>;
+fn load_identities() -> Result<Identities> {
+	let list = env::var("GENERATOR_HELPER_IDENTITIES");
+	let list = match list {
+		Ok(v) => v,
+		Err(env::VarError::NotPresent) => {
+			bail!("gh is only intended to be used from secret generator scripts, but if you really want to use it somewhere else - set GENERATOR_HELPER_IDENTITIES to list of newline-delimited ssh identities");
+		}
+		Err(e) => bail!("somehow, identities list is not utf-8: {e}"),
+	};
+	let list = list.trim();
+	ensure!(!list.is_empty(), "no identities passed, can't encrypt data");
+	list.lines()
+		.map(age::ssh::Recipient::from_str)
+		.collect::<Result<Identities, ParseRecipientKeyError>>()
+		.map_err(|e| anyhow!("parse recipients: {e:?}"))
+}
+fn make_encryptor(r: &Identities) -> Result<Encryptor> {
+	Ok(Encryptor::with_recipients(
+		r.iter()
+			.map(|v| {
+				let coerced: Box<dyn Recipient + Send> = Box::new(v.clone());
+				coerced
+			})
+			.collect(),
+	)
+	.expect("list is not empty"))
+}
+fn wrap_encoder<'t>(w: impl Write + 't, encoding: OutputEncoding) -> impl Write + 't {
+	fn coerce<'t>(w: impl Write + 't) -> Box<dyn Write + 't> {
+		Box::new(w)
+	}
+	match encoding {
+		OutputEncoding::Raw => coerce(w),
+		OutputEncoding::Base64 => {
+			use base64::engine::general_purpose::STANDARD;
+			let writer = base64::write::EncoderWriter::new(w, &STANDARD);
+			coerce(writer)
+		}
+	}
+}
+
+#[derive(Clone, Copy, ValueEnum, Default)]
+enum OutputEncoding {
+	/// Do not encode data, store as is.
+	#[default]
+	Raw,
+	/// Encode as base64 (with padding).
+	Base64,
+}
+
 #[derive(Parser)]
 enum Generate {
 	/// Generate public, private keys without wrapping, in standard ed25519 schema
 	/// (64 bytes private (due to merge with private), 32 bytes public)
 	Ed25519 {
+		#[arg(long, short = 'p')]
 		public: String,
+		#[arg(long, short = 's')]
 		private: String,
 		/// Private key should be just the private key (32 bytes), not standard private+public.
 		#[arg(long)]
 		no_embed_public: bool,
+		#[arg(long, short = 'e', value_enum, default_value_t)]
+		encoding: OutputEncoding,
+	},
+	/// Generate public, private keys without wrapping, in standard x25519 schema
+	/// (32 bytes private, 32 bytes public)
+	X25519 {
+		#[arg(long, short = 'p')]
+		public: String,
+		#[arg(long, short = 's')]
+		private: String,
+		#[arg(long, short = 'e', value_enum, default_value_t)]
+		encoding: OutputEncoding,
 	},
 	Password {
+		#[arg(long, short = 'o')]
 		output: String,
+		#[arg(long)]
 		size: usize,
 		#[arg(long, short = 'n')]
 		no_symbols: bool,
+		#[arg(long, short = 'e', value_enum, default_value_t)]
+		encoding: OutputEncoding,
 	},
 }
 
@@ -54,15 +163,17 @@
 enum Opts {
 	/// Encode public part from stdin.
 	Public {
-		#[arg(long)]
-		allow_empty: bool,
+		#[arg(long, short = 'o')]
+		output: String,
+		#[arg(long, short = 'e', value_enum, default_value_t)]
+		encoding: OutputEncoding,
 	},
 	/// Encrypt private part from stdin.
 	Private {
-		#[arg(long)]
-		allow_empty: bool,
-		#[arg(short = 'r')]
-		recipient: Vec<String>,
+		#[arg(long, short = 'o')]
+		output: String,
+		#[arg(long, short = 'e', value_enum, default_value_t)]
+		encoding: OutputEncoding,
 	},
 	/// Generate keys in well-known schemas.
 	///
@@ -70,99 +181,34 @@
 	/// otherwise you should ensure noone is able to read generated files, they don't have any mode set by default.
 	#[command(subcommand)]
 	Generate(Generate),
-	// Generate {
-	// 	kind: GenerateKind,
-	// 	/// Different generators generate different number of files, you need to specify number of outputs corresponding to the generator.
-	// 	#[arg(short = 'o')]
-	// 	outputs: Vec<String>,
-	// },
 }
 
-fn parse_stdin() -> Result<Option<Vec<u8>>> {
-	let mut input = vec![];
-	io::stdin().read_to_end(&mut input)?;
-	if input.is_empty() {
-		Ok(None)
-	} else {
-		Ok(Some(input))
-	}
-}
-pub fn encrypt_secret_data(
-	recipients: impl IntoIterator<Item = impl Recipient + Send + 'static>,
-	data: Vec<u8>,
-) -> Option<SecretData> {
-	let mut encrypted = vec![];
-	let recipients = recipients
-		.into_iter()
-		.map(|v| Box::new(v) as Box<dyn Recipient + Send>)
-		.collect::<Vec<_>>();
-	let mut encryptor = age::Encryptor::with_recipients(recipients)?
-		.wrap_output(&mut encrypted)
-		.expect("in memory write");
-	io::copy(&mut Cursor::new(data), &mut encryptor).expect("in memory copy");
-	encryptor.finish().expect("in memory flush");
-	Some(SecretData {
-		data: encrypted,
-		encrypted: true,
-	})
-}
-
 fn main() -> Result<()> {
 	let opts = Opts::parse();
 	// Assumed to be secure, seeded from secure OsRng+reseeded.
 	let mut rng = thread_rng();
 
 	match opts {
-		Opts::Public { allow_empty } => {
-			let stdin = parse_stdin()?;
-			if stdin.is_none() && !allow_empty {
-				bail!("empty stdin input is not allowed unless --allow-empty is set");
-			}
-			let stdin = stdin.unwrap_or_default();
-			io::stdout().write_all(
-				SecretData {
-					data: stdin,
-					encrypted: false,
-				}
-				.to_string()
-				.as_bytes(),
-			)?;
+		Opts::Public { output, encoding } => {
+			write_public(&output, std::io::stdin(), encoding)?;
 		}
-		Opts::Private {
-			allow_empty,
-			recipient,
-		} => {
-			let stdin = parse_stdin()?;
-			if stdin.is_none() && !allow_empty {
-				bail!("empty stdin input is not allowed unless --allow-empty is set");
-			}
-			let stdin = stdin.unwrap_or_default();
-			if recipient.is_empty() {
-				bail!("recipient list is empty");
-			}
-			let out = encrypt_secret_data(
-				recipient
-					.into_iter()
-					.map(|r| age::ssh::Recipient::from_str(&r))
-					.collect::<Result<Vec<age::ssh::Recipient>, age::ssh::ParseRecipientKeyError>>()
-					.map_err(|e| anyhow!("parse recipients: {e:?}"))?,
-				stdin,
-			)
-			.expect("got recipients");
-			io::stdout().write_all(out.to_string().as_bytes())?;
+		Opts::Private { output, encoding } => {
+			let recipients = load_identities()?;
+			write_private(&recipients, &output, std::io::stdin(), encoding)?;
 		}
 		Opts::Generate(gen) => {
-			let mut stdout_marker: bool = false;
 			match gen {
 				Generate::Ed25519 {
 					public,
 					private,
 					no_embed_public,
+					encoding,
 				} => {
-					let key = SigningKey::generate(&mut rng).to_keypair_bytes();
-
-					write_output(&public, &key[32..], &mut stdout_marker).context("public")?;
-					write_output(
+					let recipients = load_identities()?;
+					let key = ed25519_dalek::SigningKey::generate(&mut rng).to_keypair_bytes();
+					write_public(&public, &key[32..], encoding)?;
+					write_private(
+						&recipients,
 						&private,
 						&key[..{
 							if no_embed_public {
@@ -171,19 +217,31 @@
 								64
 							}
 						}],
-						&mut stdout_marker,
-					)
-					.context("private")?;
+						encoding,
+					)?;
+				}
+				Generate::X25519 {
+					public,
+					private,
+					encoding,
+				} => {
+					let recipients = load_identities()?;
+					let key = x25519_dalek::StaticSecret::random_from_rng(rng);
+					let public_key: x25519_dalek::PublicKey = (&key).into();
+					write_public(&public, public_key.as_bytes().as_slice(), encoding)?;
+					write_private(&recipients, &private, key.as_bytes().as_slice(), encoding)?;
 				}
 				Generate::Password {
 					size,
 					no_symbols,
 					output,
+					encoding,
 				} => {
 					ensure!(
 						size >= 6,
 						"misconfiguration? password is shorter than 6 chars"
 					);
+					let recipients = load_identities()?;
 					let out = if no_symbols {
 						Alphanumeric.sample_string(&mut rng, size)
 					} else {
@@ -195,7 +253,7 @@
 							.map(|i| GEN_ASCII_SYMBOLS[i] as char)
 							.collect::<String>()
 					};
-					write_output(&output, out, &mut stdout_marker)?;
+					write_private(&recipients, &output, out.as_bytes(), encoding)?;
 				}
 			}
 		}

--- a/flake.nix
+++ b/flake.nix
@@ -67,6 +67,7 @@
       perSystem = {
         config,
         system,
+        pkgs,
         ...
       }: let
         # Can also be built for darwin, through it is not usual to deploy nixos systems from macos machines.
@@ -75,14 +76,14 @@
         # It is not possible to deploy any host from armv6/armv7 hardware, and I don't think it even makes sense.
         deployerSystems = ["aarch64-linux" "x86_64-linux"];
         deployerSystem = builtins.elem system deployerSystems;
-        pkgs = import nixpkgs {
-          inherit system;
-          overlays = [(rust-overlay.overlays.default)];
-        };
         lib = pkgs.lib;
         rust = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
         craneLib = (crane.mkLib pkgs).overrideToolchain rust;
       in {
+        _module.args.pkgs = import nixpkgs {
+          inherit system;
+          overlays = [(rust-overlay.overlays.default)];
+        };
         # Reference fleet package should be built with nightly rust, specified in rust-toolchain.toml.
         packages = lib.mkIf deployerSystem (let
           packages = import ./pkgs {

--- a/lib/fleetLib.nix
+++ b/lib/fleetLib.nix
@@ -42,23 +42,46 @@
 
   mkPassword = {size ? 32}: {
     coreutils,
-    encrypt,
     mkSecretGenerator,
+    ...
   }:
     mkSecretGenerator {
       script = ''
         mkdir $out
+        gh generate password -o $out/secret --size ${toString size}
+      '';
+    };
 
-        ${coreutils}/bin/tr -dc 'A-Za-z0-9!?%=' < /dev/random \
-          | ${coreutils}/bin/head -c ${toString size} \
-          | ${encrypt} > $out/secret
+  mkEd25519 = {
+    noEmbedPublic ? false,
+    encoding ? null,
+  }: {mkSecretGenerator, ...}:
+    mkSecretGenerator {
+      script = ''
+        mkdir $out
+        gh generate ed25519 -p $out/public -s $out/secret \
+          ${lib.optionalString noEmbedPublic "--no-embed-public"} \
+          ${lib.optionalString (encoding != null) "--encoding=${encoding}"}
       '';
     };
 
+  mkGarage = {}: mkEd25519 {noEmbedPublic = true;};
+
+  mkX25519 = {encoding ? null}: {mkSecretGenerator, ...}:
+    mkSecretGenerator {
+      script = ''
+        mkdir $out
+        gh generate x25519 -p $out/public -s $out/secret \
+          ${lib.optionalString (encoding != null) "--encoding=${encoding}"}
+      '';
+    };
+
+  mkWireguard = {}: mkX25519 {encoding = "base64";};
+
   mkRsa = {size ? 4096}: {
     openssl,
-    encrypt,
     mkSecretGenerator,
+    ...
   }:
     mkSecretGenerator {
       script = ''
@@ -67,8 +90,8 @@
         ${openssl}/bin/openssl genrsa -out rsa_private.key ${toString size}
         ${openssl}/bin/openssl rsa -in rsa_private.key -pubout -out rsa_public.key
 
-        sudo cat rsa_private.key | ${encrypt} > $out/secret
-        sudo cat rsa_public.key > $out/public
+        cat rsa_private.key | gh private -o $out/secret
+        cat rsa_public.key | gh public -o $out/public
       '';
     };
 }

--- a/modules/fleet/secrets.nix
+++ b/modules/fleet/secrets.nix
@@ -130,85 +130,81 @@
     overlays = [
       (final: prev: let
         lib = final.lib;
-        inherit (lib) strings concatMap;
-        inherit (strings) escapeShellArgs;
+        inherit (lib) strings;
+        inherit (strings) concatStringsSep;
       in {
-        mkEncryptSecret = {
-          rage ? prev.rage,
-          recipients,
-        }:
-          prev.writeShellScript "encryptor" ''
-            #!/bin/sh
-            exec ${rage}/bin/rage ${escapeShellArgs (concatMap (r: ["-r" r]) recipients)} -e "$@"
-          '';
-        # TODO: Move to fleet
-        # TODO: Merge both generators to one with consistent options syntax?
-        # Impure generator is built on local machine, then built closure is copied to remote machine,
-        # and then it is ran in inpure context, so that this generator may access HSMs and other things.
-        mkImpureSecretGenerator = {
-          script,
-          # If set - script will be run on remote machine, otherwise it will be run with fleet project in CWD
-          # (Some secrets-encryption-in-git/managed PKI solution is expected)
-          impureOn ? null,
-        }:
-          (prev.writeShellScript "impureGenerator.sh" ''
-            #!/bin/sh
-            set -eu
+        mkSecretGenerators = {recipients}: rec {
+          # TODO: Merge both generators to one with consistent options syntax?
+          # Impure generator is built on local machine, then built closure is copied to remote machine,
+          # and then it is ran in inpure context, so that this generator may access HSMs and other things.
+          mkImpureSecretGenerator = {
+            script,
+            # If set - script will be run on remote machine, otherwise it will be run with fleet project in CWD
+            # (Some secrets-encryption-in-git/managed PKI solution is expected)
+            impureOn ? null,
+          }:
+            (prev.writeShellScript "impureGenerator.sh" ''
+              #!/bin/sh
+              set -eu
+
+              export GENERATOR_HELPER_IDENTITIES="${concatStringsSep "\n" recipients}";
+              export PATH=${final.fleet-generator-helper}/bin:$PATH
 
-            # TODO: Provide tempdir from outside, to make it securely erasurable as needed?
-            tmp=$(mktemp -d)
-            cd $tmp
-            # cd /var/empty
+              # TODO: Provide tempdir from outside, to make it securely erasurable as needed?
+              tmp=$(mktemp -d)
+              cd $tmp
+              # cd /var/empty
 
-            created_at=$(date -u +"%Y-%m-%dT%H:%M:%S.%NZ")
+              created_at=$(date -u +"%Y-%m-%dT%H:%M:%S.%NZ")
 
-            ${script}
+              ${script}
 
-            if ! test -d $out; then
-              echo "impure generator script did not produce expected \$out output"
-              exit 1
-            fi
+              if ! test -d $out; then
+                echo "impure generator script did not produce expected \$out output"
+                exit 1
+              fi
 
-            echo -n $created_at > $out/created_at
-            echo -n SUCCESS > $out/marker
-          '')
-          .overrideAttrs (old: {
-            passthru = {
-              inherit impureOn;
-              generatorKind = "impure";
-            };
-          });
-        # Pure generators are disabled for now
-        mkSecretGenerator = {script}: final.mkImpureSecretGenerator {inherit script;};
+              echo -n $created_at > $out/created_at
+              echo -n SUCCESS > $out/marker
+            '')
+            .overrideAttrs (old: {
+              passthru = {
+                inherit impureOn;
+                generatorKind = "impure";
+              };
+            });
+          # Pure generators are disabled for now
+          mkSecretGenerator = {script}: mkImpureSecretGenerator {inherit script;};
 
-        # TODO: Implement consistent naming
-        # Pure secret generator is supposed to be run entirely by nix, using `__impure` derivation type...
-        # But for now, it is ran the same way as `impureSecretGenerator`, but on the local machine.
-        # mkSecretGenerator = {script}:
-        #   (prev.writeShellScript "generator.sh" ''
-        #     #!/bin/sh
-        #     set -eu
-        #     # TODO: make nix daemon build secret, not just the script.
-        #     cd /var/empty
-        #
-        #     created_at=$(date -u +"%Y-%m-%dT%H:%M:%S.%NZ")
-        #
-        #     ${script}
-        #     if ! test -d $out; then
-        #       echo "impure generator script did not produce expected \$out output"
-        #       exit 1
-        #     fi
-        #
-        #     echo -n $created_at > $out/created_at
-        #     echo -n SUCCESS > $out/marker
-        #   '')
-        #   .overrideAttrs (old: {
-        #     passthru = {
-        #       generatorKind = "pure";
-        #     };
-        #     # TODO: make nix daemon build secret, not just the script.
-        #     # __impure = true;
-        #   });
+          # TODO: Implement consistent naming
+          # Pure secret generator is supposed to be run entirely by nix, using `__impure` derivation type...
+          # But for now, it is ran the same way as `impureSecretGenerator`, but on the local machine.
+          # mkSecretGenerator = {script}:
+          #   (prev.writeShellScript "generator.sh" ''
+          #     #!/bin/sh
+          #     set -eu
+          #     # TODO: make nix daemon build secret, not just the script.
+          #     cd /var/empty
+          #
+          #     created_at=$(date -u +"%Y-%m-%dT%H:%M:%S.%NZ")
+          #
+          #     ${script}
+          #     if ! test -d $out; then
+          #       echo "impure generator script did not produce expected \$out output"
+          #       exit 1
+          #     fi
+          #
+          #     echo -n $created_at > $out/created_at
+          #     echo -n SUCCESS > $out/marker
+          #   '')
+          #   .overrideAttrs (old: {
+          #     passthru = {
+          #       generatorKind = "pure";
+          #     };
+          #     # TODO: make nix daemon build secret, not just the script.
+          #     # __impure = true;
+          #   });
+        };
       })
     ];
   };

--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -2,6 +2,7 @@
   callPackage,
   craneLib,
 }: {
+  fleet = callPackage ./fleet.nix {inherit craneLib;};
   fleet-install-secrets = callPackage ./fleet-install-secrets.nix {inherit craneLib;};
-  fleet = callPackage ./fleet.nix {inherit craneLib;};
+  fleet-generator-helper = callPackage ./fleet-generator-helper.nix {inherit craneLib;};
 }