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https://issues.apache.org/jira/browse/KNOX-3414?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sandor Molnar updated KNOX-3414:
--------------------------------
Description:
Follow-up work on the KnoxIDF OAuth2/OIDC Authorization Server. Items to fix:
Client authentication & flow security
- Authenticate the client on the refresh_token grant.
- Authenticate the client on the authorization_code grant (PKCE S256 or
constant-time client_secret).
- Reject PKCE plain; accept only S256, and advertise only S256 in discovery.
- Require and validate state/nonce; bind the federated id_token to the request
via nonce.
- Atomically consume authorization codes and refresh tokens before issuance
(close replay windows).
Federation
- Fully validate the federated OP id_token (signature/JWKS, issuer, audience,
exp/nbf, sub) before trusting any claim.
- Reject a federated id_token missing sub with a 4xx, not a 500.
- Fail closed when a federated-OP client-secret alias is unresolvable.
- Stop persisting federated OP access tokens at rest; store only
ID-token-derived identity data.
- Activate federated-identity persistence (was silently disabled) with
self-provisioning embedded Derby default.
Redirect-URI / registration
- Normalize redirect_uri path before wildcard matching; match on parsed URI
components (fix open redirect).
- Build a well-formed success redirect when redirect_uri already carries a
query.
- Require HTTPS for registered redirect URIs (loopback HTTP excepted, RFC 8252).
- Make anonymous dynamic client registration an explicit, secure-by-default
opt-in.
Correctness / robustness
- Fix SCOPE_ATTRIBUTE always resolving to null (double getClaim).
- Fix iat=1970 regression on non-KnoxIDF tokens (default issue time to now).
- /userinfo returns 401 invalid_token, not 500, for a bad bearer token.
- Fix broken double-checked locking in service init paths.
- Escape LDAP username input; remove hardcoded LDAP system-password fallback
(fail fast).
- Per-request claim map (fix cross-user claim leakage in the shared singleton).
Persistence
- Fix TOCTOU on federated-identity insert (unique constraint as arbiter).
- Write identity + attributes in a single transaction.
- Align Derby schema (NOT NULL / unique index) with other dialects.
Key management & auditing
- Publish multiple JWKs and select the verification key by kid (enables
zero-downtime signing-key rotation).
- Emit structured audit records across the OAuth2/OIDC endpoints.
OIDC discovery / docs
- Complete OIDC discovery metadata for OAuth/MCP client integration.
- Add opt-in Keycloak federation E2E test; extend existing E2E suite to cover
the fixes above.
- Add the Identity Federation (OIDC Provider) documentation book.
was:To be filled later...
> KnoxIDF (OIDC Provider): security hardening, correctness fixes, and
> documentation
> ---------------------------------------------------------------------------------
>
> Key: KNOX-3414
> URL: https://issues.apache.org/jira/browse/KNOX-3414
> Project: Apache Knox
> Issue Type: Improvement
> Components: KnoxIDF
> Reporter: Sandor Molnar
> Assignee: Sandor Molnar
> Priority: Critical
> Fix For: 3.1.0
>
>
> Follow-up work on the KnoxIDF OAuth2/OIDC Authorization Server. Items to fix:
> Client authentication & flow security
> - Authenticate the client on the refresh_token grant.
> - Authenticate the client on the authorization_code grant (PKCE S256 or
> constant-time client_secret).
> - Reject PKCE plain; accept only S256, and advertise only S256 in discovery.
> - Require and validate state/nonce; bind the federated id_token to the
> request via nonce.
> - Atomically consume authorization codes and refresh tokens before issuance
> (close replay windows).
> Federation
> - Fully validate the federated OP id_token (signature/JWKS, issuer, audience,
> exp/nbf, sub) before trusting any claim.
> - Reject a federated id_token missing sub with a 4xx, not a 500.
> - Fail closed when a federated-OP client-secret alias is unresolvable.
> - Stop persisting federated OP access tokens at rest; store only
> ID-token-derived identity data.
> - Activate federated-identity persistence (was silently disabled) with
> self-provisioning embedded Derby default.
> Redirect-URI / registration
> - Normalize redirect_uri path before wildcard matching; match on parsed URI
> components (fix open redirect).
> - Build a well-formed success redirect when redirect_uri already carries a
> query.
> - Require HTTPS for registered redirect URIs (loopback HTTP excepted, RFC
> 8252).
> - Make anonymous dynamic client registration an explicit, secure-by-default
> opt-in.
> Correctness / robustness
> - Fix SCOPE_ATTRIBUTE always resolving to null (double getClaim).
> - Fix iat=1970 regression on non-KnoxIDF tokens (default issue time to now).
> - /userinfo returns 401 invalid_token, not 500, for a bad bearer token.
> - Fix broken double-checked locking in service init paths.
> - Escape LDAP username input; remove hardcoded LDAP system-password fallback
> (fail fast).
> - Per-request claim map (fix cross-user claim leakage in the shared
> singleton).
> Persistence
> - Fix TOCTOU on federated-identity insert (unique constraint as arbiter).
> - Write identity + attributes in a single transaction.
> - Align Derby schema (NOT NULL / unique index) with other dialects.
> Key management & auditing
> - Publish multiple JWKs and select the verification key by kid (enables
> zero-downtime signing-key rotation).
> - Emit structured audit records across the OAuth2/OIDC endpoints.
> OIDC discovery / docs
> - Complete OIDC discovery metadata for OAuth/MCP client integration.
> - Add opt-in Keycloak federation E2E test; extend existing E2E suite to cover
> the fixes above.
> - Add the Identity Federation (OIDC Provider) documentation book.
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