cf.tls_client_auth.cert_rfc9440
cf.tls_client_auth.cert_rfc9440 String The mTLS client certificate encoded as a Structured Fields Byte Sequence per RFC 9440.
Contains the DER-encoded, Base64-wrapped client leaf certificate formatted as an RFC 9440 Client-Cert HTTP header value. The value is a Structured Fields Byte Sequence (the Base64 data prefixed and suffixed by :).
This field is populated regardless of the certificate validation result. Before using this value, verify the certificate status by checking cf.tls_client_auth.cert_verified and cf.tls_client_auth.cert_revoked.
Returns "" if no client certificate was presented or if the encoded value exceeds the 10 KiB size limit. Refer to cf.tls_client_auth.cert_rfc9440_too_large to distinguish between these cases.
This field defaults to "" if the connection does not use mTLS authentication.
Example value:
":MIIBqDCCAU6g......:"- Request
- mTLS