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* 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]>