Read the file and store the encoded password in a macro variable. The DATA step stores the encoded password in the macro variable DBPASS. For details about the INFILE and INPUT statements, the $VARYING. informat, and the CALL SYMPUT routine, see SAS Language Reference: Dictionary.

data _null_;
   infile pwfile obs=1 length=l; 
   input @;
   input @1 line $varying1024. l; 
   call symput('dbpass',substr(line,1,l)); 
run;