You can use the Extract WSS Username Token filter to extract
a WS-Security Username Token from a message if it exists. The extracted Username
Token is stored in the wss.usernameToken message attribute.
If you want to process the Username Token later in the circuit, you can specify
this message attribute in the configuration screen for the processing filter.
For example, if you want to sign the Username Token, you can simply specify the
wss.usernameToken message attribute in the What to
Sign section of the Sign Message filter. Open the
Message Attribute tab on the What to Sign
screen, and specify this attribute to sign the Username Token.
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