ASP.NET MVC 4 Cross field or property validation

[GreenEyes]

I'm trying to figure out how to validate that a user has entered matching passwords when they sign up. Is there anything built in to MVC 4 Data Annotations that I can use for this or is the only route creating a custom validation attribute? If I do have to create a custom validation attribute, how do I access the password property (assuming I put the annotation on the confirm password property)? Also, are there any commonly used libraries for this type of validation?This is what I have for the beginning of a custom validation attribute, just not sure how to access the password property:\[code\]public class CrossFieldValidationAttribute : ValidationAttribute{ public override bool IsValid(object value) //how do I get the other value in here? { //validation logic here return base.IsValid(value); }}\[/code\]I appreciate any help!