I'm going to wrap database trigger's source code, command properly run but source not encrypt
Oracle's wrap program doesn't wrap triggers. The way to do this is to move the code into a package or a stand-alone procedure, and make the trigger a one line call to invoke this code.

See the documentation on the limitations of wrapping: https://docs.oracle.com/cd/B28359_01/appdev.111/b28370/wrap.htm#LNPLS01602

In your case, something like the following (untested) should work:

CREATE OR REPLACE PROCEDURE block_tools AS
DECLARE
v_prog sys.v_$session.program%TYPE;
BEGIN
SELECT upper(program) INTO v_prog
FROM sys.v_$session
WHERE  audsid = USERENV('SESSIONID')
AND  audsid != 0
AND  ROWNUM = 1;
IF UPPER(USERENV('TERMINAL')) NOT IN ('MOAZZAM-LT') THEN
IF UPPER(v_prog) LIKE '%TOAD%' OR UPPER(v_prog) LIKE '%T.O.A.D%' OR --OR — Toad
UPPER(v_prog) LIKE '%SQLNAV%' OR --    — SQL Navigator
UPPER(v_prog) LIKE '%PLSQLDEV%' OR --— PLSQL Developer
UPPER(v_prog) LIKE '%BUSOBJ%' OR --  — Business Objects
UPPER(v_prog) LIKE '%EXCEL%'  OR --    — MS-Excel plug-in
UPPER(v_prog) LIKE '%SQLPLUS%' OR --     — SQLPLUS
UPPER(v_prog) LIKE '%FRMBLD%' OR
UPPER(v_prog) LIKE '%IFBLD60%' or upper(v_prog) is null
THEN
RAISE_APPLICATION_ERROR(-20983, 'You are not allowed to login in '||v_prog);
END IF;
END IF;
END;
/

CREATE OR REPLACE TRIGGER block_tools_trigger_HR
AFTER LOGON ON HRMS.SCHEMA
CALL block_tools;


All I've done is move all the code into a stored procedure, and redefined the trigger to CALL that procedure.