OpenSSL: ASYNC operations and application callback function.
narasimha.nayak at gmail.com
Fri Sep 13 16:47:52 UTC 2019
I am investigating the usage of OpenSSL v1.1.1.c with QAT offload.
As part of the investigation to enable ASYNC mode for SSL ops I came across
the possibility of providing callbacks via “SSL_CTX_set_async_callback”,
and not use poll/select as required earlier.
The callback functionality has been added via commit (
in Nov, 2018.
These changes are not yet part of OpenSSL v1.1.1c/d.
Hence I would like to understand the following:
1. Is this feature complete and use-able with QAT engine provided by
Intel for OpenSSL ? Are there any drawbacks to be aware of ?
2. Do we have any examples to depict the usage for these APIs ? Will
help to know if there are any corner cases to handle.
Any feedback is much appreciated.
Thanks and Regards,
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