294 lines
8.7 KiB
Python
Executable File
294 lines
8.7 KiB
Python
Executable File
#!/usr/bin/env python3
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from __future__ import annotations
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import argparse
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import getpass
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import json
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import shlex
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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 typing import Any
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import yaml
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REPO_DIR = Path(__file__).resolve().parents[1]
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class BaoRunner:
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def __init__(
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self,
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*,
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kubectl: str,
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namespace: str,
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release: str,
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dry_run: bool,
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use_token_helper: bool,
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token: str | None,
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) -> None:
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self.kubectl_parts = shlex.split(kubectl)
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self.namespace = namespace
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self.pod = f"{release}-0"
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self.dry_run = dry_run
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self.use_token_helper = use_token_helper
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self.token = token
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def run(
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self,
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args: list[str],
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*,
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input_text: str | None = None,
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check: bool = True,
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quiet: bool = False,
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) -> subprocess.CompletedProcess[str]:
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if self.dry_run:
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print("DRY-RUN: bao " + shlex.join(args))
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return subprocess.CompletedProcess(args, 0, "", "")
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if self.use_token_helper:
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cmd = (
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self.kubectl_parts
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+ ["exec", "-i", "-n", self.namespace, self.pod, "--", "bao"]
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+ args
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)
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proc_input = input_text
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else:
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if not self.token:
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raise RuntimeError(
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"OpenBao token is required unless --use-token-helper is set"
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)
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cmd = (
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self.kubectl_parts
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+ [
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"exec",
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"-i",
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"-n",
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self.namespace,
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self.pod,
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"--",
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"sh",
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"-c",
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'read -r BAO_TOKEN; export BAO_TOKEN; exec bao "$@"',
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"sh",
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]
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+ args
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)
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proc_input = self.token + "\n" + (input_text or "")
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result = subprocess.run(cmd, input=proc_input, capture_output=True, text=True)
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if check and result.returncode != 0:
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if result.stdout and not quiet:
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print(result.stdout, end="")
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if result.stderr:
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print(result.stderr, file=sys.stderr, end="")
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raise SystemExit(result.returncode)
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if not quiet and result.stdout:
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print(result.stdout, end="")
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if not quiet and result.stderr:
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print(result.stderr, file=sys.stderr, end="")
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return result
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def run_with_token(
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*,
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kubectl: str,
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namespace: str,
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release: str,
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token: str,
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args: list[str],
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check: bool,
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) -> subprocess.CompletedProcess[str]:
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kubectl_parts = shlex.split(kubectl)
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cmd = (
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kubectl_parts
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+ [
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"exec",
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"-i",
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"-n",
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namespace,
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f"{release}-0",
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"--",
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"sh",
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"-c",
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'read -r BAO_TOKEN; export BAO_TOKEN; exec bao "$@"',
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"sh",
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]
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+ args
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)
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return subprocess.run(
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cmd, input=token + "\n", capture_output=True, text=True, check=False
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)
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def read_token(
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token_file: str | None, dry_run: bool, use_token_helper: bool
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) -> str | None:
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if dry_run or use_token_helper:
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return None
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if token_file:
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path = Path(token_file)
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if not path.exists():
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raise SystemExit(f"ERROR: OPENBAO_TOKEN_FILE does not exist: {path}")
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lines = path.read_text(encoding="utf-8").splitlines()
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token = lines[0].strip() if lines else ""
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if not token:
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raise SystemExit(f"ERROR: OPENBAO_TOKEN_FILE is empty: {path}")
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return token
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token = getpass.getpass("OpenBao token: ")
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if not token:
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raise SystemExit("ERROR: empty OpenBao token")
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return token
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def load_catalog(path: Path) -> dict[str, Any]:
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with path.open("r", encoding="utf-8") as handle:
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data = yaml.safe_load(handle)
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if not isinstance(data, dict):
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raise SystemExit(f"ERROR: catalog root must be an object: {path}")
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return data
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def selected_grants(
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catalog: dict[str, Any], grant_id: str | None
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) -> list[dict[str, Any]]:
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grants = catalog.get("grants") or []
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if not isinstance(grants, list):
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raise SystemExit("ERROR: catalog grants must be a list")
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selected = [
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grant for grant in grants if not grant_id or grant.get("id") == grant_id
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]
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if grant_id and not selected:
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raise SystemExit(f"ERROR: grant not found in catalog: {grant_id}")
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return selected
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def verify_static(runner: BaoRunner, grant: dict[str, Any]) -> None:
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openbao = grant["openbao"]
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runner.run(["read", f"auth/token/roles/{openbao['token_role']}"])
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runner.run(["policy", "read", openbao["issuer_policy"]])
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runner.run(["policy", "read", openbao["policies"][0]])
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print(f"OK: static token-grant config readable for {grant['id']}")
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def issue_smoke_token(
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runner: BaoRunner,
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*,
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kubectl: str,
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namespace: str,
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release: str,
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grant: dict[str, Any],
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) -> None:
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openbao = grant["openbao"]
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ttl = grant["ttl"]["default"]
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policies = openbao["policies"]
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result = runner.run(
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[
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"token",
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"create",
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f"-role={openbao['token_role']}",
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f"-policy={policies[0]}",
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f"-ttl={ttl}",
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"-format=json",
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],
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quiet=True,
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)
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try:
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payload = json.loads(result.stdout)
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auth = payload.get("auth") or payload.get("data") or {}
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child_token = auth["client_token"]
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accessor = auth["accessor"]
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except Exception as exc: # noqa: BLE001
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raise SystemExit(
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f"ERROR: could not parse token create response: {exc}"
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) from exc
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try:
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positive = run_with_token(
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kubectl=kubectl,
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namespace=namespace,
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release=release,
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token=child_token,
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args=["list", "ssh/roles"],
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check=False,
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)
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if positive.returncode != 0:
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raise SystemExit(
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"ERROR: child token could not list ssh/roles with warden-sign policy"
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)
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print("OK: child token can list ssh/roles")
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negative = run_with_token(
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kubectl=kubectl,
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namespace=namespace,
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release=release,
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token=child_token,
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args=["secrets", "list"],
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check=False,
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)
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if negative.returncode == 0:
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raise SystemExit("ERROR: child token unexpectedly listed secret engines")
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print("OK: child token cannot list secret engines")
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finally:
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runner.run(["token", "revoke-accessor", accessor], quiet=True)
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print("OK: smoke child token revoked by accessor")
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def main() -> int:
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parser = argparse.ArgumentParser(description="Verify OpenBao token grants.")
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parser.add_argument("--catalog", default="credential-grants/catalog.yaml")
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parser.add_argument("--grant", help="Limit to one grant id")
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parser.add_argument("--dry-run", action="store_true")
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parser.add_argument(
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"--use-token-helper",
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action="store_true",
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help="Use the OpenBao CLI token helper inside the pod",
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)
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parser.add_argument(
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"--issue-smoke-token",
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action="store_true",
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help="Mint and revoke a short-lived child token for live verification",
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)
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parser.add_argument("--namespace", default=None)
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parser.add_argument("--release", default=None)
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parser.add_argument("--kubectl", default=None)
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args = parser.parse_args()
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import os
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namespace = args.namespace or os.environ.get("OPENBAO_NAMESPACE", "openbao")
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release = args.release or os.environ.get("OPENBAO_RELEASE", "openbao")
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kubectl = args.kubectl or os.environ.get("KUBECTL", "kubectl")
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token_file = os.environ.get("OPENBAO_TOKEN_FILE")
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token = read_token(token_file, args.dry_run, args.use_token_helper)
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catalog = load_catalog(REPO_DIR / args.catalog)
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runner = BaoRunner(
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kubectl=kubectl,
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namespace=namespace,
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release=release,
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dry_run=args.dry_run,
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use_token_helper=args.use_token_helper,
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token=token,
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)
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for grant in selected_grants(catalog, args.grant):
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verify_static(runner, grant)
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if args.issue_smoke_token:
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if args.dry_run:
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print(
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f"DRY-RUN: would mint and revoke smoke child token for {grant['id']}"
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)
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else:
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issue_smoke_token(
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runner,
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kubectl=kubectl,
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namespace=namespace,
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release=release,
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grant=grant,
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)
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return 0
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if __name__ == "__main__":
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raise SystemExit(main())
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