public static void addSignatureAlgorithmsExtension(Hashtable extensions,Vector supportedSignatureAlgorithms) throws IOException {
  extensions.put(EXT_signature_algorithms,createSignatureAlgorithmsExtension(supportedSignatureAlgorithms));
}

public static void addSignatureAlgorithmsExtension ( Hashtable extensions , Vector supportedSignatureAlgorithms ) throws IOException { extensions . put ( EXT_signature_algorithms , createSignatureAlgorithmsExtension ( supportedSignatureAlgorithms ) ) ; }
add a ' signature_algorithms ' extension to existing extensions .
