|  | # The ESAPI validator does many security checks on input, such as canonicalization | 
|  | # and whitelist validation. Note that all of these validation rules are applied *after* | 
|  | # canonicalization. Double-encoded characters (even with different encodings involved, | 
|  | # are never allowed. | 
|  | # | 
|  | # To use: | 
|  | # | 
|  | # First set up a pattern below. You can choose any name you want, prefixed by the word | 
|  | # "Validation." For example: | 
|  | #   Validation.Email=^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+\\.[a-zA-Z]{2,4}$ | 
|  | # | 
|  | # Then you can validate in your code against the pattern like this: | 
|  | #     ESAPI.validator().isValidInput("User Email", input, "Email", maxLength, allowNull); | 
|  | # Where maxLength and allowNull are set for you needs, respectively. | 
|  | # | 
|  | # But note, when you use boolean variants of validation functions, you lose critical | 
|  | # canonicalization. It is preferable to use the "get" methods (which throw exceptions) and | 
|  | # and use the returned user input which is in canonical form. Consider the following: | 
|  | # | 
|  | # try { | 
|  | #    someObject.setEmail(ESAPI.validator().getValidInput("User Email", input, "Email", maxLength, allowNull)); | 
|  | # | 
|  | #Validator.SafeString=^[.;:\\-\\p{Alnum}\\p{Space}]{0,1024}$ | 
|  | Validator.username=^[;=\\*\/\/_()\\-0-9\\p{L}\\p{Space}]{0,15}$ | 
|  | Validator.password_cap=((?=.*\\d)(?=.*[a-z])(?=.*[A-Z]).{8,20}) | 
|  | Validator.password=((?=.*\\d)(?=.*[a-zA-Z]).{8,20}) | 
|  | Validator.SafeString=^[.;:,=\\*\/\/_()\\-0-9\\p{L}\\p{Space}]{0,1024}$ | 
|  | Validator.email=^[A-Za-z0-9._%'-]+@[A-Za-z0-9.-]+\\.[a-zA-Z]{2,4}$ | 
|  | Validator.ipddress=^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$ | 
|  | Validator.url=^(ht|f)tp(s?)\\:\\/\\/[0-9a-zA-Z]([-.\\w]*[0-9a-zA-Z])*(:(0-9)*)*(\\/?)([a-zA-Z0-9\\-\\.\\?\\,\\:\\'\\/\\\\\\+=&%\\$#_]*)?$ | 
|  | Validator.CreditCard=^(\\d{4}[- ]?){3}\\d{4}$ | 
|  | Validator.SSN=^(?!000)([0-6]\\d{2}|7([0-6]\\d|7[012]))([ -]?)(?!00)\\d\\d\\3(?!0000)\\d{4}$ | 
|  |  |