nvflare.tool.cert.fingerprint module

Certificate fingerprint helpers for distributed provisioning.

cert_fingerprint_sha256(cert) → str[source]: Return an OpenSSL-style SHA256 fingerprint for a loaded x509 certificate.

normalize_sha256_fingerprint(value: str) → str[source]

Normalize common SHA256 certificate fingerprint forms to SHA256:AA:BB....

Accepted forms include: - sha256 Fingerprint=AA:BB:... from openssl x509 -fingerprint -sha256 - SHA256:AA:BB:... - SHA256=AA:BB:... - plain 64-character hex strings

Returns an empty string when the value is not a valid SHA256 fingerprint.