Introduction
Web Services Enhancements for Microsoft .NET (WSE) is a .NET class library for building Web services using the latest Web services protocols, including WS-Security, WS-SecureConversation, WS-Trust, and WS-Addressing. WSE allows adding these capabilities at design time using code or at deployment time using a policy file.
WSE Architecture
At its heart, WSE is an engine for applying advanced Web service protocols to SOAP messages. This entails writing headers to outbound SOAP messages and reading headers from inbound SOAP messages. It may also require transforming the SOAP message body — for instance, encrypting an outbound message's body and decrypting an inbound message's body, as defined by the WS-Security specification. This functionality is encapsulated by two sets of filters, one for outbound messages and one for inbound messages.
All messages leaving a process — request messages from a client or response messages from server — are processed using the outbound message filters.
All messages arriving in a process — request messages to a server or response messages to a client — are processed using the inbound message filters. The following diagram shows this simple architecture.
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