* fixes#3809 support CSR submission during OIDC authentication
- accepts an optional CSR during OIDC login (all auth methods) and
signs it into a session-bound certificate with a SPIFFE ID derived
from the identity and API session
- returns the signed certificate PEM as a top-level "session_cert"
field in the token endpoint JSON response (CodeExchange, RefreshToken,
TokenExchange)
- adds cert-binding verification on RefreshToken and TokenExchange:
if z_cfs is present the peer cert fingerprint must match (strict),
otherwise falls back to SPIFFE ID verification
- supports cert rotation via csr_pem form parameter on refresh and
token exchange; replaces the session cert fingerprint while
preserving the authenticating cert fingerprint
- adds AuthCertFingerprints (z_acfs) claim to track permanent auth
cert fingerprints separately from rotatable session cert fingerprints
- only the leaf certificate fingerprint is added to z_cfs and z_acfs,
intermediates are never included
- invalid CSR returns 400 Bad Request in OIDC error format
- propagates updated CustomClaims (including CertFingerprints) from
access token to renewed refresh token so rotated fingerprints are
enforced on subsequent refreshes
- adds CertGenerated field to ApiSessionEvent
- advertises OIDC_AUTH_WITH_CSR controller capability when OIDC is
enabled
- adds unit tests for verifyCertBinding (fingerprint, SPIFFE ID,
edge cases) and CsrPem field parsing
- adds integration tests for initial CSR auth (updb, cert, ext-jwt),
cert-binding on refresh/exchange, CSR rotation with cert auth,
SPIFFE fallback and z_cfs transition, and CSR property forging
resistance
* address pr concerns
* add z_cfs len tests on junk chain certs
* strip csr subject info, replace w/ santized values
* fix csr rotation rejection/paths during token exchange/refresh
fixes#3084 adds events and improper chain flag
- splits cert resolution into root, legacy root + intermediate,
and third-party pool. Allowing the detection of client authentication
with incomplete chains if root + intermediate succeeds after root only fails
- adds `improperClientCertChain` to API Sessions and Current API Session.
Added for OIDC and legacy auth. Set to true when a client certificate is used
that was issued by the network and did not pass the root-only pool.
Also fix member events. We were getting add evetts on startup as the log was replayed. Store them in the
DB so we only get events when membership has actually changed.
Andrew Martinez