在数据库中用函数进行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;