protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
string password = (string)value;
// password must be between 8 and 30 characters.
if (password == null)
{
return(new ValidationResult("Your password cannot be empty and is required"));
}
var passwordMinLength = 8;
var passwordMaxLength = 30;
if (password.Length < passwordMinLength || password.Length > passwordMaxLength)
{
return(new ValidationResult($"Your password must be at least {passwordMinLength}, and no more than {passwordMaxLength} characters."));
}
// password must have at least 1 upper case character.
const string BaseString = "Your password must contain at least 1 {0} character.";
if (!password.Any(char.IsUpper))
{
return(new ValidationResult(String.Format(BaseString, "upper case")));
}
// password must have at least 1 lower case character.
if (!password.Any(char.IsLower))
{
return(new ValidationResult(String.Format(BaseString, "lower case")));
}
// password must have at least 1 digit.
if (!password.Any(char.IsDigit))
{
return(new ValidationResult(String.Format(BaseString, "digit")));
}
// password must have at least 1 special character.
const string Special_Char_String = "!@#$%^&*?`~|";
if (!password.Any(c => Special_Char_String.Contains(c)))
{
return(new ValidationResult(String.Format(BaseString, "special") + $" Valid Special characters are '{Special_Char_String}'."));
}
// password cannot contain any whitespace.
if (password.Any(char.IsWhiteSpace))
{
return(new ValidationResult("Your password cannot contain any spaces, tabs, or newlines."));
}
return(ValidationResult.Success);
}
public static string CleanString2(string original, int size = 31, string specialchars = "")
{
StringBuilder sbuilder = new StringBuilder();
string Special_Char_String = ",.=()!@#$%&~`'+ ^*[]{}/?:;<>|"; // 11-28-2012: removed "-" from list
if (specialchars != "")
{
Special_Char_String += specialchars;
}
foreach (char c in original)
{
if (!Special_Char_String.Contains(c))
{
sbuilder.Append(c);
}
else
{
if (c == '<')
{
sbuilder.Append("<");
}
else if (c == '>')
{
sbuilder.Append(">");
}
else
{
sbuilder.Append("_");
}
}
}
if (sbuilder.Length > size)
{
sbuilder.Remove(size - 1, sbuilder.Length - size);
}
return(sbuilder.ToString());
}