code: public static boolean verify(byte[] data, byte[] signature, byte[] pub) {
          return verify(data, ECDSASignature.decodeFromDER(signature), pub);
      }
docs: Verifies the given ASN.1 encoded ECDSA signature against a hash using the
  public key.
  
  @param data
  Hash of the data to verify.
  @param signature
  signature.
  @param pub
  The public key bytes to use.
  
  @return -