Oracle MD5 加密

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;