pub fn extract_signature_algorithm_oid(cert_der: &[u8]) -> Result<&[u8], Error>Expand description
Extract the signature algorithm OID from an X.509 certificate.
Returns the raw OID bytes from the signatureAlgorithm field of the
certificate (NOT the TBSCertificate’s inner signature field — those are
the same per RFC 5280 but the outer one is what covers the signed data).