Check password strength Post: 302425044

Sponsored Content

Top Forums UNIX for Dummies Questions & Answers Check password strength Post 302425044 by pludi on Thursday 27th of May 2010 05:27:33 AM

05-27-2010

Registered User

Ah, the beauty of Perl:

Code:

perl -nle 'exit 0 if( /.{8,}/ && ( s/\d//g ) >= 2 && ( s/[\$\._,%-]//g) >= 1 ); exit 1;'

This will return an exit code of 0 if, and only if, these requirements are met:

At least 8 characters (blue)
At least 2 of these are digits (green)
At least 1 special character from the group (not including the quotes) "$._,%-" (red)

Otherwise, the return code is 1.

Example usage (showing the return code):

Code:

> echo 'abcdefg' | perl -nle 'exit 0 if( /.{8,}/ && ( s/\d//g ) >= 2 && ( s/[\$\._,%-]//g) >= 1 ); exit 1;' ; echo $?
1
> echo 'abcdefgh' | perl -nle 'exit 0 if( /.{8,}/ && ( s/\d//g ) >= 2 && ( s/[\$\._,%-]//g) >= 1 ); exit 1;' ; echo $?
1
> echo '1abcdefgh2' | perl -nle 'exit 0 if( /.{8,}/ && ( s/\d//g ) >= 2 && ( s/[\$\._,%-]//g) >= 1 ); exit 1;' ; echo $?
1
> echo '1abcdefgh2$' | perl -nle 'exit 0 if( /.{8,}/ && ( s/\d//g ) >= 2 && ( s/[\$\._,%-]//g) >= 1 ); exit 1;' ; echo $?
0

pludi

View Public Profile for pludi

Find all posts by pludi

9 More Discussions You Might Find Interesting

1. Programming

check root password

hai Friends How can i check the root password of a linux system using a c program or with some shell script... I have seen many tools like webmin that authenticates the user using the root password... How do they do that... Pls help... Thanks in advance Collins

2. UNIX for Dummies Questions & Answers

Password safe encryption strength

I'm not sure if this is the right forum for this or not but we use a program called "Password Safe" to store the many root passwords we have for our Unix system. Now we are being called out by our security team to prove that this is a safe program to use. So far I have been able to determine...

3. UNIX for Dummies Questions & Answers

password check

Hi While using Pipe concept ,if a user enters a "login name" and "paswword" ,then how does a child process check for user password is correct or not and give notification to parent process.

4. Shell Programming and Scripting

Check password age

Hi Guys, I hope one of you has already done this and is kind enough to share your script with me. I have a Solaris8 server that uses password aging for its local user accounts. I need a script that checks the age of the password and then sends the user an email if the password is about to...

5. Shell Programming and Scripting

How can I check that a password is correct?

Hi there, There's something I don't understand. The same string does not give the same md5 hash everytime. I wanted to find a way to check someone's password but the following script obviously shows that it's not possible that way : ks354286:~# user=foo ks354286:~# pw=$(mkpasswd -H md5...

6. Cybersecurity

Periodic check of user password strength

I need to periodically run a check on the passwords of the users (Redhat 5.0) to verify that all passwords meet minimal standards. I remember seeing a script years ago that grabbed the encrypted passwords from the file and checked if they matched any of the encrypted strings in another file, plus...

7. Solaris

Check when password expires

How do I check to see when a password expires on a user account with using the CLI?

8. AIX

How to find TX and RX strength?

I have an AIX server running 6.1. My SAN switch is reporting that it is only receiving 5.9 uWatts (micro watts) and it should be well over 100 uWatts. How can I see the transmit strength of my fiber card from within AIX? I have Emulex fiber cards.

9. Cybersecurity

Openssl cipher strength

I have read the forums for strengthing the openssl ciphers on a server and the following command I can run: openssl ciphers -v 'TLSv1+HIGH:!SSLv2:RC4!MEDIUM:!aNULL:!eNULL:!3DES:!EXPORT:@STRENGTH' I have some services that cannot be set to higher levels like you can set in an httpd.conf file....

LEARN ABOUT PHP

set_color

set_color(1)							       fish							      set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
   Synopsis
       set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]

   Description
       Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
       cyan, white and normal.

       o -b, --background Set the background color

       o -c, --print-colors Prints a list of all valid color names

       o -h, --help Display help message and exit

       o -o, --bold Set bold or extra bright mode

       o -u, --underline Set underlined mode

       o -v, --version Display version and exit

       Calling set_color normal will set the terminal color to whatever is the default color of the terminal.

       Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey
       font color, while set_color --bold white will result in a white font color.

       Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator.

       set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and
       incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of
       ncurses and recompile fish against it in order to fix this issue.

Version 1.23.1							  Sun Jan 8 2012						      set_color(1)