Template
westfarnandCursor
787f0e48fb
Extract always-on public/portal/UTM plus optional email_sms, directmail, blog, payments, social, and social_ai so new client sites can be bootstrapped from this seed. Refs #1 Refs #2 Co-authored-by: Cursor <cursoragent@cursor.com>
68 lines
2.1 KiB
Python
68 lines
2.1 KiB
Python
"""Token encryption helpers for SocialAccount / SocialAppCredentials."""
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from cryptography.fernet import Fernet, InvalidToken
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from django.conf import settings
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# Copied from .env.prod.example / deploy templates — not valid Fernet material.
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_PLACEHOLDER_KEYS = frozenset(
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{
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"replace-with-fernet-key",
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"changeme",
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"change-me",
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"todo",
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}
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)
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class SocialCryptoError(ValueError):
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"""Raised when SOCIAL_TOKEN_ENCRYPTION_KEY is missing or not a Fernet key."""
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def _normalize_key(raw: str | bytes | None) -> bytes | None:
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if raw is None:
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return None
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if isinstance(raw, bytes):
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text = raw.decode("utf-8", errors="ignore").strip()
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else:
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text = str(raw).strip()
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if not text or text.lower() in _PLACEHOLDER_KEYS:
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return None
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return text.encode()
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def _fernet() -> Fernet:
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key = _normalize_key(settings.SOCIAL_TOKEN_ENCRYPTION_KEY)
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if key is None:
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if settings.DEBUG:
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# Dev-only unstable fallback — set SOCIAL_TOKEN_ENCRYPTION_KEY for real use.
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return Fernet(Fernet.generate_key())
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raise SocialCryptoError(
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"SOCIAL_TOKEN_ENCRYPTION_KEY is not set. Generate one with: "
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'python -c "from cryptography.fernet import Fernet; '
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'print(Fernet.generate_key().decode())" '
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"and add it to the beta/prod app env, then redeploy/restart."
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)
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try:
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return Fernet(key)
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except (ValueError, TypeError) as exc:
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raise SocialCryptoError(
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"SOCIAL_TOKEN_ENCRYPTION_KEY is invalid (must be 32 url-safe "
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"base64-encoded bytes from Fernet.generate_key()). "
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"Replace the placeholder in the beta/prod env and restart."
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) from exc
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def encrypt_tokens(plaintext: str) -> str:
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return _fernet().encrypt(plaintext.encode()).decode()
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def decrypt_tokens(ciphertext: str) -> str:
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if not ciphertext:
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return ""
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try:
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return _fernet().decrypt(ciphertext.encode()).decode()
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except InvalidToken as exc:
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raise ValueError("Unable to decrypt social tokens") from exc
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except SocialCryptoError:
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raise
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