Just wondering.
We usually trim a user name in various forms in our ASP.Net application, whats the best practices for password fields.
i.e. should we remove a trailing space in a password field before being saved/encrypted?
It depends,
Some users copy their password from somewhere or fill in their password and copy paste it in the Confirm Password field. This sometimes gives a extra space before and after the password. A space will be encrypted as well while they didn't even realize a space was there.
While other users actually create passwords with spaces in.
It's totally up to you to decide your password policy. Just make sure it is very clear for the user what your password policy is. Either by alerting them if they used a space or alerting them using a space isn't allowed.