c# - ASP.NET Identity, require 'strong' passwords

Question

Perhaps my googlin' skills are not so great this morning, but I can't seem to find how to set up different password requirements (rather than min/max length) with a new asp.net mvc5 project using individual user accounts.

[Required]
[StringLength(100, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 6)]
[DataType(DataType.Password)]
[Display(Name = "Password")]
public string Password { get; set; }

I don't know what password requirements I want to do just yet, but likely a combination of min length and requiring one lowercase, on capital letter, and a number.

Any idea how I can accomplish this (via model attributes preferably)?

question from:https://stackoverflow.com/questions/20953371/asp-net-identity-require-strong-passwords

Answer 1

You could use the RegularExpressionAttribute together with the rules from this answer:

Regex to validate password strength