|
| 1 | +"""The resolve client: fetch ``GET /v1/resolve`` and decrypt it locally.""" |
| 2 | + |
| 3 | +from __future__ import annotations |
| 4 | + |
| 5 | +import json |
| 6 | +import os |
| 7 | +import urllib.error |
| 8 | +import urllib.request |
| 9 | +from typing import Dict, Mapping, MutableMapping, Optional |
| 10 | + |
| 11 | +from ._crypto import TokenKey, materialize |
| 12 | +from .errors import SeekritApiError, SeekritCryptoError, SeekritError |
| 13 | + |
| 14 | +DEFAULT_API_URL = "https://api.seekrit.dev" |
| 15 | + |
| 16 | + |
| 17 | +class Client: |
| 18 | + """A read-only seekrit client bound to one service token. |
| 19 | +
|
| 20 | + A service token selects exactly one app environment (plus its composed |
| 21 | + group slices); resolving returns the merged, decrypted secrets for it. |
| 22 | +
|
| 23 | + Args: |
| 24 | + token: ``skt_...`` service token. Defaults to ``$SEEKRIT_TOKEN``. |
| 25 | + api_url: API base URL. Defaults to ``$SEEKRIT_API_URL`` or |
| 26 | + ``https://api.seekrit.dev``. |
| 27 | + overrides: optional ``{group_slug: env_slug}`` map to pull a different |
| 28 | + environment slice of a composed group (the ``?with=`` override). |
| 29 | + timeout: per-request timeout in seconds. |
| 30 | + """ |
| 31 | + |
| 32 | + def __init__( |
| 33 | + self, |
| 34 | + token: Optional[str] = None, |
| 35 | + *, |
| 36 | + api_url: Optional[str] = None, |
| 37 | + overrides: Optional[Mapping[str, str]] = None, |
| 38 | + timeout: float = 30.0, |
| 39 | + ) -> None: |
| 40 | + token = token or os.environ.get("SEEKRIT_TOKEN") |
| 41 | + if not token: |
| 42 | + raise SeekritError("no service token: pass token= or set SEEKRIT_TOKEN") |
| 43 | + self._token = token |
| 44 | + self._key = TokenKey.parse(token) # fail fast on a bad token |
| 45 | + self._api_url = (api_url or os.environ.get("SEEKRIT_API_URL") or DEFAULT_API_URL).rstrip("/") |
| 46 | + self._overrides = dict(overrides or {}) |
| 47 | + self._timeout = timeout |
| 48 | + |
| 49 | + def resolve(self) -> Dict[str, str]: |
| 50 | + """Fetch, decrypt, and merge; return ``{NAME: value}``.""" |
| 51 | + return materialize(self._fetch(), self._key) |
| 52 | + |
| 53 | + def get(self, name: str, default: Optional[str] = None) -> Optional[str]: |
| 54 | + """Return a single secret's value, or ``default`` if it is not present.""" |
| 55 | + return self.resolve().get(name, default) |
| 56 | + |
| 57 | + def into_env( |
| 58 | + self, |
| 59 | + env: Optional[MutableMapping[str, str]] = None, |
| 60 | + *, |
| 61 | + override: bool = False, |
| 62 | + ) -> Dict[str, str]: |
| 63 | + """Load resolved secrets into ``env`` (default ``os.environ``). |
| 64 | +
|
| 65 | + By default an existing variable is left untouched (process env wins); |
| 66 | + pass ``override=True`` to let resolved secrets take precedence. |
| 67 | + Returns the merged secrets that were resolved. |
| 68 | + """ |
| 69 | + target = os.environ if env is None else env |
| 70 | + merged = self.resolve() |
| 71 | + for name, value in merged.items(): |
| 72 | + if override or name not in target: |
| 73 | + target[name] = value |
| 74 | + return merged |
| 75 | + |
| 76 | + # -- internal --------------------------------------------------------- |
| 77 | + |
| 78 | + def _fetch(self) -> dict: |
| 79 | + url = self._api_url + "/v1/resolve" |
| 80 | + query = "&".join(f"with={g}:{e}" for g, e in sorted(self._overrides.items())) |
| 81 | + if query: |
| 82 | + url += "?" + query |
| 83 | + request = urllib.request.Request( |
| 84 | + url, |
| 85 | + method="GET", |
| 86 | + headers={"authorization": f"Bearer {self._token}", "accept": "application/json"}, |
| 87 | + ) |
| 88 | + try: |
| 89 | + with urllib.request.urlopen(request, timeout=self._timeout) as response: |
| 90 | + return json.loads(response.read()) |
| 91 | + except urllib.error.HTTPError as exc: |
| 92 | + raise self._api_error(exc.code, exc.read()) from exc |
| 93 | + except urllib.error.URLError as exc: |
| 94 | + raise SeekritError(f"resolve request failed: {exc.reason}") from exc |
| 95 | + |
| 96 | + @staticmethod |
| 97 | + def _api_error(status: int, body: bytes) -> SeekritApiError: |
| 98 | + code, message = "internal", f"HTTP {status}" |
| 99 | + try: |
| 100 | + error = json.loads(body).get("error", {}) |
| 101 | + code = error.get("code", code) |
| 102 | + message = error.get("message", message) |
| 103 | + except (ValueError, AttributeError): |
| 104 | + pass |
| 105 | + return SeekritApiError(status, code, message) |
| 106 | + |
| 107 | + |
| 108 | +__all__ = ["Client", "DEFAULT_API_URL", "SeekritError", "SeekritApiError", "SeekritCryptoError"] |
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