Motivation:
OpenSslEngine.wrap(...) and OpenSslEngie.unwrap(...) may consume bytes even if an BUFFER_OVERFLOW / BUFFER_UNDERFLOW is detected. This is not correct as it should only consume bytes if it can process them without storing data between unwrap(...) / wrap(...) calls. Beside this it also should only process one record at a time.
Modifications:
- Correctly detect BUFFER_OVERFLOW / BUFFER_UNDERFLOW and only consume bytes if non of them is detected.
- Only process one record per call.
Result:
OpenSslEngine behaves like stated in the javadocs of SSLEngine.
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