127 lines
4.2 KiB
Python
127 lines
4.2 KiB
Python
import os
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import shlex
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import shutil
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import subprocess
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import sys
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from pathlib import Path
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from tempfile import TemporaryDirectory
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from typing import Any
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from clan_cli.nix import nix_shell
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from ..dirs import specific_flake_dir
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from ..errors import ClanError
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from .folders import sops_secrets_folder
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from .machines import add_machine, has_machine
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from .secrets import decrypt_secret, encrypt_secret, has_secret
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from .sops import generate_private_key
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def generate_host_key(flake_name: str, machine_name: str) -> None:
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if has_machine(flake_name, machine_name):
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return
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priv_key, pub_key = generate_private_key()
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encrypt_secret(
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flake_name,
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sops_secrets_folder(flake_name) / f"{machine_name}-age.key",
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priv_key,
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)
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add_machine(flake_name, machine_name, pub_key, False)
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def generate_secrets_group(
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flake_name: str,
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secret_group: str,
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machine_name: str,
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tempdir: Path,
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secret_options: dict[str, Any],
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) -> None:
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clan_dir = specific_flake_dir(flake_name)
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secrets = secret_options["secrets"]
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needs_regeneration = any(
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not has_secret(flake_name, f"{machine_name}-{secret['name']}")
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for secret in secrets.values()
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)
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generator = secret_options["generator"]
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subdir = tempdir / secret_group
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if needs_regeneration:
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facts_dir = subdir / "facts"
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facts_dir.mkdir(parents=True)
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secrets_dir = subdir / "secrets"
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secrets_dir.mkdir(parents=True)
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text = f"""\
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set -euo pipefail
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export facts={shlex.quote(str(facts_dir))}
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export secrets={shlex.quote(str(secrets_dir))}
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{generator}
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"""
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try:
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cmd = nix_shell(["bash"], ["bash", "-c", text])
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subprocess.run(cmd, check=True)
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except subprocess.CalledProcessError:
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msg = "failed to the following command:\n"
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msg += text
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raise ClanError(msg)
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for secret in secrets.values():
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secret_file = secrets_dir / secret["name"]
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if not secret_file.is_file():
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msg = f"did not generate a file for '{secret['name']}' when running the following command:\n"
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msg += text
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raise ClanError(msg)
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encrypt_secret(
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flake_name,
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sops_secrets_folder(flake_name) / f"{machine_name}-{secret['name']}",
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secret_file.read_text(),
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add_machines=[machine_name],
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)
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for fact in secret_options["facts"].values():
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fact_file = facts_dir / fact["name"]
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if not fact_file.is_file():
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msg = f"did not generate a file for '{fact['name']}' when running the following command:\n"
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msg += text
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raise ClanError(msg)
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fact_path = clan_dir.joinpath(fact["path"])
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fact_path.parent.mkdir(parents=True, exist_ok=True)
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shutil.copyfile(fact_file, fact_path)
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# this is called by the sops.nix clan core module
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def generate_secrets_from_nix(
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flake_name: str,
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machine_name: str,
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secret_submodules: dict[str, Any],
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) -> None:
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generate_host_key(flake_name, machine_name)
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errors = {}
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with TemporaryDirectory() as d:
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# if any of the secrets are missing, we regenerate all connected facts/secrets
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for secret_group, secret_options in secret_submodules.items():
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try:
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generate_secrets_group(
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flake_name, secret_group, machine_name, Path(d), secret_options
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)
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except ClanError as e:
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errors[secret_group] = e
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for secret_group, error in errors.items():
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print(f"failed to generate secrets for {machine_name}/{secret_group}:")
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print(error, file=sys.stderr)
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if len(errors) > 0:
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sys.exit(1)
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# this is called by the sops.nix clan core module
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def upload_age_key_from_nix(
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flake_name: str,
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machine_name: str,
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) -> None:
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secret_name = f"{machine_name}-age.key"
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if not has_secret(
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flake_name, secret_name
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): # skip uploading the secret, not managed by us
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return
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secret = decrypt_secret(flake_name, secret_name)
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secrets_dir = Path(os.environ["SECRETS_DIR"])
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(secrets_dir / "key.txt").write_text(secret)
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