I need some help with a RegEx.  I am using ColdFusion 8.  Ultimately, I need to validate new and changing passwords to meet The Enterprise's password complexity requirements.  I have two web forms - one for new users, and another for existing users to reset their passwords.  For both forms I will be using server-side validation on post.  I need a regular expression that validates according to the following rules:

Passwords must be at least 7 characters and contains characters from 3 of the following four character type groups:
    Upper Case Letters: A B C...
    Lower Case Letters: a b c...
    Numbers: 1 2 3...
    Special Characters/Symbols: ` ~ ! @ ## $ % ^ & * ( ) _ + - = { } | \ : " ; ' < > ? , .

I would like to use one regular expression to do this, but I'm not against writing CF logic to accomplish the same thing.  It seems like the 3 out of 4 bit would be pretty complex.  But for as much as I know about Regular Expressions, it might not be.

Thanks so much for your help.

-Jonathan

Scratch the double ## special character.  Thst should just be #.

See if you can adapt the patterns from this thread http://regexadvice.com/forums/thread/28417.aspx which addresses a very similar problem.

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Michael

"In theory, theory and practice are the same. In practice, they are not."
Albert Einstein