CGI/Perl Guide | Learning Center | Forums | Advertise | Login Site Search: in Perl Guide PerlGuru Forums Learning Ctr

	MAIN INDEX	SEARCH POSTS	WHO'S ONLINE	LOG IN

Home: Perl Programming Help: Beginner: How to validate special character passwords?

Shrutika Novice Oct 3, 2013, 3:25 AM Post #1 of 11 (3266 views) How to validate special character passwords? Can't Post Hi, I am writing a program to check if the password entered is bad,strong or excellent. If a password is excellent, the password needs to include letter in capital(atleast one), atleast one digit and atleast one specail character(@,$ etc.) I am able to validate everything except special characters. Please help.Couldnt find the answer,though its such a simple thing

Tejas User Oct 3, 2013, 3:43 AM Post #2 of 11 (3265 views) Re: [Shrutika] How to validate special character passwords? [In reply to] Can't Post Need to have a preceeding '\' before the character. For example if u are searching for $, then it should be \$. Thanks Tejas

Shrutika Novice Oct 3, 2013, 4:13 AM Post #3 of 11 (3263 views) Re: [Tejas] How to validate special character passwords? [In reply to] Can't Post Thanks Tejas. But isnt there a shorter way? as in like for digits we can use [0-9] or \d. Any such shorthand for special characters?

Tejas User Oct 3, 2013, 4:15 AM Post #4 of 11 (3261 views) Re: [Tejas] How to validate special character passwords? [In reply to] Can't Post Can you please paste the code snippet over here, So that i can analyse and understand the requirement . Just post whatever you have tried

Tejas User Oct 3, 2013, 4:21 AM Post #5 of 11 (3260 views) Re: [Shrutika] How to validate special character passwords? [In reply to] Can't Post Character classes also have ordinary and special characters, but the sets of ordinary and special characters inside a character class are different than those outside a character class. The special characters for a character class are -]\^$ and are matched using an escape: /[\]c]def/; # matches ']def' or 'cdef' $x = 'bcr'; /[$x]at/; # matches 'bat, 'cat', or 'rat' /[\$x]at/; # matches '$at' or 'xat' /[\\$x]at/; # matches '\at', 'bat, 'cat', or 'rat'

Shrutika Novice Oct 3, 2013, 4:25 AM Post #6 of 11 (3258 views) Re: [Tejas] How to validate special character passwords? [In reply to] Can't Post Well here's my basic structure of the code #! /usr/bin/perl print("Enter password\n"); $in=<STDIN>; if($in=~ /(?=.*[A-Z])(?=.*[a-z])(?=.*[\W])/) { print("Excellent password\n"); } elsif($in =~ /(?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])/) { print("Good password \n"); } elsif($in =~ /(?=.*[A-Z])(?=.*[a-z])/) { print("Bad password\n"); }

Tejas User Oct 3, 2013, 4:28 AM Post #7 of 11 (3257 views) Re: [Tejas] How to validate special character passwords? [In reply to] Can't Post Perl has several abbreviations for common character classes. (These definitions are those that Perl uses in ASCII-safe mode with the /a modifier. Otherwise they could match many more non-ASCII Unicode characters as well. See Backslash sequences in perlrecharclass for details.) \d is a digit and represents [0-9] \s is a whitespace character and represents [\ \t\r\n\f] \w is a word character (alphanumeric or _) and represents [0-9a-zA-Z_] \D is a negated \d; it represents any character but a digit [^0-9] \S is a negated \s; it represents any non-whitespace character [^\s] \W is a negated \w; it represents any non-word character [^\w] The period '.' matches any character but "\n" Above might help you too.

Shrutika Novice Oct 3, 2013, 4:31 AM Post #8 of 11 (3256 views) Re: [Tejas] How to validate special character passwords? [In reply to] Can't Post Thanks a lot Tejas. I 'll try the code with the inputs you have given

Tejas User Oct 3, 2013, 5:20 AM Post #9 of 11 (3253 views) Re: [Shrutika] How to validate special character passwords? [In reply to] Can't Post Thanks. Please do come with the final piece of code, if successful Thanks

Shrutika Novice Oct 8, 2013, 7:14 AM Post #10 of 11 (3226 views) Re: [Tejas] How to validate special character passwords? [In reply to] Can't Post #! /usr/bin/perl print("Enter password\n"); $in=<STDIN>; if($in=~ /(?=.*[A-Z])(?=.*[a-z])(?=.*[\d])(?=.*[\$\@\!\#\%\^\&\*\(\)])/) { print("Excellent password\n"); } elsif($in =~ /(?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])/) { print("Good password \n"); } elsif($in =~ /(?=.*[A-Z])(?=.*[a-z])/) { print("Bad password\n"); } This code works as I want it to. Thanks for the inputs.

Tejas User Oct 8, 2013, 8:05 AM Post #11 of 11 (3220 views) Re: [Shrutika] How to validate special character passwords? [In reply to] Can't Post Ok cool So, U have considered the slash in front of all the special char's u wanted.

Announcements     PerlGuru Announcements Perl Programming Help     Frequently Asked Questions     Beginner     Intermediate     Advanced     Regular Expressions     mod_perl     DBI     Win32 Programming Help Fun With Perl     Perl Quizzes - Learn Perl the Fun Way     Perl Golf     Perl Poetry Need a Custom or Prewritten Perl Program?     I need a program that...     I Need a Programmer for Freelance Work     Throw Down The Gauntlet General Discussions     General Questions     Feedback     Tutorial/Article Suggestions for The Learning Cent     Internet Security Other Programming Languages     Javascript     PHP

Search this forum this category all forums for All words Any words Whole Phrase (options)

Powered by Gossamer Forum v.1.2.0

Web Applications & Managed Hosting Powered by Gossamer Threads
Visit our Mailing List Archives