Validating an xml document using dtd in asp net
Validating an xml document using dtd in asp net - ninja dating site
If you want text from a user comment form, it is difficult to decide on a legitimate set of characters because nearly every character has a legitimate use.
However, simply preventing attacks is not enough - you must perform Intrusion Detection in your applications.Here are some examples: If you expect a phone number, you can strip out all non-digit characters.Thus, "(555)123-1234", "555.123.1234", and "555\"; DROP TABLE USER;--123.1234" all convert to 5551231234.int payee Lst Id = Parameter('payeelstid'); account From = Acct Number By Index(payee Lst Id); Not only is this easier to render in HTML, it makes validation and business rule validation trivial. To provide defense in depth and to prevent attack payloads from trust boundaries, such as backend hosts, which are probably incapable of handling arbitrary input data, business rule validation is to be performed (preferably in workflow or command patterns), even if it is known that the back end code performs business rule validation.This is not to say that the entire set of business rules need be applied - it means that the fundamentals are performed to prevent unnecessary round trips to the backend and to prevent the backend from receiving most tampered data.Say you want to set up a site where users can upload arbitrary files so they can share them or download them again from another location.
In this case validation is impossible because there is no valid or invalid content.Some documentation and references interchangeably use the various meanings, which is very confusing to all concerned.This confusion directly causes continuing financial loss to the organization.For example, the web / presentation tier should validate for web related issues, persistence layers should validate for persistence issues such as SQL / HQL injection, directory lookups should check for LDAP injection, and so on.Business rules are known during design, and they influence implementation.Otherwise, you are allowing attackers to repeatedly attack your application until they find a vulnerability that you haven't protected against.