gatling/gatling — pull request #2164 by HNeitzel (2014-09-02 14:05:00+00:00)
Title: Session-Conext sensitive SignatureCalculators

adds the possibility to set a signatureCalculator as Expression[SignatureCalculator]

This allows you to e.g. use a user-specific key to sign a request. While it has to change a few internals, it leaves the API unchanged except for adding:
signatureCalculator(Expression[SignatureCalculator]])
as a way to specify the signature calculator