calculated thumbrint is different from Java calculated thumbprint

[sius]

Hello,
compared to the Java implementation, the binary string produces a different result.
Using the buffer directly yields the same result as the Java (1.8) implementation.

Java Implementation Example:

public String calculate(java.security.cert.X509Certificate cert)  throws CertificateEncodingException {
  MessageDigest md = MessageDigest.getInstance("SHA-1");
  byte[] der = cert.getEncoded();
  md.update(der);
  byte[] digest = md.digest();
  return DatatypeConverter.printHexBinary(digest).toLowerCase();
}

This Java Implementation returns the same thumbprint (fingerprint) hexstrings as the Java keytool when listing a keystore.

Best regards

[wurmr]

This is true for the way windows exports the fingerprints as well. Removing that toString call seems like the correct thing to do.