Reading password in Unix shell

admin — Tue, 02 Feb 2010 21:18:51 +0000

print -n "Enter Your password:"
stty_orig=`stty -g`
trap "stty ${stty_orig}; exit" 1 2 3 15
stty -echo >&- 2>&-
read PASS
stty ${stty_orig} >&- 2>&-
trap 1 2 3 15
print

trap :catches interruptions. I.e. if the user presses Ctrl+C, the normal stty mode is set before stopping the program
stty -echo :switches off the display echo
>&- 2>&- :helps to avoid “stty: Not a typewriter” message for non-interactive scripts.

Oracle: password function

admin — Wed, 23 Sep 2009 11:39:43 +0000

Find the name of the current password function

SELECT * FROM DBA_PROFILES WHERE RESOURCE_NAME='PASSWORD_VERIFY_FUNCTION';

Change the password function for the profile:

ALTER PROFILE &profile. LIMIT PASSWORD_VERIFY_FUNCTION &function_name.;

Example of the password function:

CREATE OR REPLACE FUNCTION dummy_func
(USERNAME VARCHAR2, PASSWORD VARCHAR2, OLD_PASSWORD VARCHAR2)
RETURN BOOLEAN IS
BEGIN
IF NLS_LOWER(password) = NLS_LOWER(username) THEN
raise_application_error(-20001, 'Password is the same as the username');
END IF;
RETURN(TRUE);
END;

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Reading password in Unix shell

Oracle: password function