* fix(crypto): use authenticated encryption for IDP intent tokens
IDP intent tokens were encrypted with AES-CFB which provides no
integrity protection, making them malleable. Switch to A256GCM via
the existing AuthAlgorithm interface (EncryptToken/DecryptToken),
the same approach already used for OIDC and session tokens.
The idpConfigEncryption key type is widened from EncryptionAlgorithm
to AuthEncryptionAlgorithm so that data-at-rest encryption (IDP
client secrets, LDAP bind passwords, SAML keys) continues to use
the CFB path unmodified.
Co-authored-by: Cursor <[email protected]>
* fix(proto): raise IDP intent token max length to 500 for authenticated tokens
The switch to authenticated A256GCM (JWE compact serialization) makes IDP
intent tokens longer (~270 chars) than the previous AES-CFB base64 output.
Raise the max_len/max_length validation and OpenAPI constraints on every
idp_intent_token field from 200 to 500 so the new tokens are accepted:
user v2/v2beta (idp + user_service), session v2/v2beta, and resources
user v3alpha.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
---------
Co-authored-by: Cursor <[email protected]>
Co-authored-by: Claude Opus 4.8 <[email protected]>
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