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https://github.com/enpaul/vault2vault.git
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Add mvp functionality
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parent
fdfdcbff47
commit
cecb42022a
349
vault2vault.py
349
vault2vault.py
@ -1,4 +1,21 @@
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"""CLI tool for recursively rekeying ansible-vault encrypted secrets"""
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import argparse
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import getpass
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import logging
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import re
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import shutil
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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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from typing import List
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from typing import Sequence
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from typing import Tuple
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from typing import Union
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import ansible.constants
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import ansible.parsing.vault
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import ruamel.yaml
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__title__ = "vault2vault"
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__summary__ = "Recursively rekey ansible-vault encrypted files and in-line variables"
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@ -6,3 +23,335 @@ __version__ = "0.0.0"
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__url__ = "https://github.com/enpaul/vault2vault/"
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__license__ = "MIT"
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__authors__ = ["Ethan Paul <24588726+enpaul@users.noreply.github.com>"]
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YAML_FILE_EXTENSIONS = (".yml", ".yaml")
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yaml = ruamel.yaml.YAML(typ="rt")
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ruamel.yaml.add_constructor(
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"!vault",
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lambda loader, node: node.value,
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constructor=ruamel.yaml.SafeConstructor,
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)
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def rekey(
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old: ansible.parsing.vault.VaultLib,
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new: ansible.parsing.vault.VaultLib,
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content: bytes,
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) -> bytes:
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return new.encrypt(old.decrypt(content))
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def _get_args() -> argparse.Namespace:
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parser = argparse.ArgumentParser(
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prog=__title__,
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description=__summary__,
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)
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parser.add_argument(
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"--version", help="Show program version and exit", action="store_true"
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)
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parser.add_argument(
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"--interactive",
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help="Step through files and variables interactively, prompting for confirmation before making each change",
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action="store_true",
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)
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parser.add_argument(
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"-v",
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"--verbose",
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help="Increase verbosity; can be repeated",
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action="count",
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default=0,
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)
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parser.add_argument(
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"-b",
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"--backup",
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help="Write a backup of every file to be modified, suffixed with '.bak'",
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action="store_true",
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)
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parser.add_argument(
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"-i",
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"--vault-id",
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help="Limit rekeying to encrypted secrets with the specified Vault ID",
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type=str,
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default=ansible.constants.DEFAULT_VAULT_IDENTITY,
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)
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parser.add_argument(
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"--ignore-undecryptable",
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help="Ignore any file or variable that is not decryptable with the provided vault secret instead of raising an error",
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action="store_true",
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)
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parser.add_argument(
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"--old-pass-file",
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help="Path to a file with the old vault password to decrypt secrets with",
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type=str,
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dest="old_pass_file",
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)
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parser.add_argument(
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"--new-pass-file",
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help="Path to a file with the new vault password to rekey secrets with",
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type=str,
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dest="new_pass_file",
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)
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parser.add_argument(
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"paths", help="Paths to search for Ansible Vault encrypted content", nargs="*"
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)
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return parser.parse_args()
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def _confirm(prompt: str, default: bool = True) -> bool:
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while True:
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confirm = input(f"{prompt} [{'YES/no' if default else 'yes/NO'}]: ")
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if not confirm:
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return default
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if confirm.lower() in ["yes", "y"]:
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return True
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if confirm.lower() in ["no", "n"]:
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return False
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print("Please input one of the specified options", file=sys.stderr)
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def _process_file(
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path: Path,
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old: ansible.parsing.vault.VaultLib,
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new: ansible.parsing.vault.VaultLib,
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interactive: bool,
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backup: bool,
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ignore: bool,
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) -> None:
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logger = logging.getLogger(__name__)
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logger.debug(f"Processing file {path}")
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def _process_yaml_data(content: bytes, data: Any, name: str = ""):
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if isinstance(data, dict):
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for key, value in data.items():
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content = _process_yaml_data(content, value, f"{name}.{key}")
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elif isinstance(data, list):
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for index, item in enumerate(data):
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content = _process_yaml_data(content, item, f"{name}.{index}")
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elif isinstance(data, ruamel.yaml.comments.TaggedScalar):
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if old.is_encrypted(data.value):
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logger.debug(f"Identified vaulted content in {path} at '{name}'")
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confirm = (
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_confirm(f"Rekey vault encrypted variable {name} in file {path}?")
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if interactive
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else True
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)
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if not confirm:
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logger.debug(
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f"User skipped vault encrypted content in {path} at '{name}' via interactive mode"
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)
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return content
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new_data = rekey(old, new, data.value.encode())
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content_decoded = content.decode("utf-8")
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search_data = data.value.split("\n")[1]
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try:
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padding = len(
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re.search(rf"\n(\s*){search_data}\n", content_decoded).groups()[
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0
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]
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)
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except (TypeError, AttributeError):
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if data.anchor.value:
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logger.debug(
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f"Content replacement for encrypted content in {path} at {name} was not found, so replacement will be skipped because target is a YAML anchor"
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)
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return content
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raise
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padded_old_data = "\n".join(
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[
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f"{' ' * padding}{item}"
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for item in data.value.split("\n")
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if item
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]
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)
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padded_new_data = "\n".join(
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[
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f"{' ' * padding}{item}"
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for item in new_data.decode("utf-8")
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if item
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]
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)
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content = content_decoded.replace(
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padded_old_data, padded_new_data
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).encode()
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return content
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with path.open("rb") as infile:
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raw = infile.read()
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# The 'is_encrypted' check doesn't rely on the vault secret in the VaultLib matching the
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# secret the data was encrypted with, it just checks that the data is encrypted with some
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# vault secret. We could use either `old` or `new` for this check, it doesn't actually matter.
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if old.is_encrypted(raw):
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logger.debug(f"Identified vault encrypted file: {path}")
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confirm = (
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_confirm(f"Rekey vault encrypted file {path}?") if interactive else True
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)
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if not confirm:
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logger.debug(
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f"User skipped vault encrypted file {path} via interactive mode"
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)
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return
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if backup:
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path.rename(f"{path}.bak")
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try:
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updated = rekey(old, new, raw)
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except ansible.parsing.vault.AnsibleVaultError:
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msg = f"Failed to decrypt vault encrypted file {path} with provided vault secret"
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if ignore:
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logger.warning(msg)
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return
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raise RuntimeError(msg)
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elif path.suffix.lower() in YAML_FILE_EXTENSIONS:
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logger.debug(f"Identified YAML file: {path}")
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confirm = (
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_confirm(f"Search YAML file {path} for vault encrypted variables?")
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if interactive
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else True
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)
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data = yaml.load(raw)
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if not confirm:
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logger.debug(
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f"User skipped processing YAML file {path} via interactive mode"
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)
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return
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if backup:
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shutil.copy(path, f"{path}.bak")
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updated = _process_yaml_data(raw, data)
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else:
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logger.debug(f"Skipping non-vault file {path}")
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return
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logger.debug(f"Writing updated file contents to {path}")
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with path.open("wb") as outfile:
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outfile.write(updated)
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def _expand_paths(paths: Sequence[Union[Path, str]]) -> List[Path]:
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logger = logging.getLogger(__name__)
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results = []
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for path in paths:
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path = Path(path).resolve()
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if path.is_file():
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logger.debug(f"Including file {path}")
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results.append(path)
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elif path.is_dir():
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logger.debug(f"Descending into subdirectory {path}")
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results += _expand_paths(path.iterdir())
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else:
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logger.debug(f"Discarding path {path}")
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return results
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def _read_vault_pass_file(path: Union[Path, str]) -> str:
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logger = logging.getLogger(__name__)
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try:
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with Path(path).resolve().open() as infile:
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return infile.read()
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except (FileNotFoundError, PermissionError):
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logger.error(
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f"Specified vault password file '{path}' does not exist or is unreadable"
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)
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sys.exit(1)
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def _load_passwords(
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old_file: str, new_file: str
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) -> Tuple[ansible.parsing.vault.VaultSecret, ansible.parsing.vault.VaultSecret]:
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logger = logging.getLogger(__name__)
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if old_file:
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old_vault_pass = _read_vault_pass_file(old_file)
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logger.info(f"Loaded old vault password from {Path(old_file).resolve()}")
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else:
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logger.debug(
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"No old vault password file provided, prompting for old vault password input"
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)
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old_vault_pass = getpass.getpass(
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prompt="Old Ansible Vault password: ", stream=sys.stderr
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)
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if new_file:
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new_vault_pass = _read_vault_pass_file(new_file)
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logger.info(f"Loaded new vault password from {Path(new_file).resolve()}")
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else:
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logger.debug(
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"No new vault password file provided, prompting for new vault password input"
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)
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new_vault_pass = getpass.getpass(
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prompt="New Ansible Vault password: ", stream=sys.stderr
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)
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confirm = getpass.getpass(
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prompt="Confirm new Ansible Vault password: ", stream=sys.stderr
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)
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if new_vault_pass != confirm:
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logger.error("New vault passwords do not match")
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sys.exit(1)
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return ansible.parsing.vault.VaultSecret(
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old_vault_pass.encode("utf-8")
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), ansible.parsing.vault.VaultSecret(new_vault_pass.encode("utf-8"))
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def main():
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args = _get_args()
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logger = logging.getLogger(__name__)
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logging.basicConfig(
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stream=sys.stderr,
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format="%(levelname)s: %(message)s",
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level=max(logging.WARNING - (args.verbose * 10), 0),
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)
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if args.version:
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print(f"{__title__} {__version__}")
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sys.exit(0)
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if not args.paths:
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logger.warning("No path provided, nothing to do!")
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sys.exit(0)
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old_pass, new_pass = _load_passwords(args.old_pass_file, args.new_pass_file)
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in_vault = ansible.parsing.vault.VaultLib([(args.vault_id, old_pass)])
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out_vault = ansible.parsing.vault.VaultLib([(args.vault_id, new_pass)])
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logger.debug(
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f"Identifying all files under {len(args.paths)} input paths: {', '.join(args.paths)}"
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)
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files = _expand_paths(args.paths)
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for filepath in files:
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_process_file(
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filepath,
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in_vault,
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out_vault,
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args.interactive,
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args.backup,
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args.ignore_undecryptable,
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)
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if __name__ == "__main__":
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main()
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