oracle实现md5加密的函数

CREATE OR REPLACE FUNCTION fn_md5(input_string IN VARCHAR2) RETURN VARCHAR2 IS
  raw_input     RAW(128) := UTL_RAW.cast_to_raw(input_string);
  decrypted_raw RAW(2048);
  error_in_input_buffer_length EXCEPTION;
BEGIN
  DBMS_OBFUSCATION_TOOLKIT.md5(input    => raw_input,
                               checksum => decrypted_raw);
  RETURN LOWER(RAWTOHEX(decrypted_raw));
END;