Tag Archives: regex

A tweet from @JanEgilRing caught my eye this morning, it was showing how you can use powershell to create passwords. The link in the tweet pointed here: http://powershell.com/cs/blogs/tips/archive/2016/05/23/one-liner-random-password-generator.aspx Seeing that line and realizing how simple it was, it got me thinking on how I could implement this in my scripts. The only issue I saw with that one-liner was that the passwords it creates do not necessarily comply with high complexity rules. So, how can we approve on this? Firstly, we need to create a regex that we can use to validate that the password created complies with our rules. In our environment this means 12 characters, uppercase, lowercase and either a number or special character. The regex I ended up with is this one: ^.*(?=.{12,})(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%^&+=]).*$ (which I found here: https://nilangshah.wordpress.com/2007/06/26/password-validation-via-regular-expression/ ) Now that we have our regex we can simple throw the one-liner into a while loop: while ($pass -notmatch “^.*(?=.{12,})(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%^&+=]).*$”) { $pass = -join (‘abcdefghkmnrstuvwxyzABCDEFGHKLMNPRSTUVWXYZ23456789$%&*#’.ToCharArray() |…

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