prf: add function to retrieve early keying material
This adds a new function gnutls_prf_early
to retrieve early keying material. The function shall be used in a handshake hook for GNUTLS_HANDSHAKE_CLIENT_HELLO
.
Fixes #329 (closed), #736 (closed).
Checklist
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Code modified for feature -
Test suite updated with functionality tests -
Test suite updated with negative tests -
Documentation updated / NEWS entry present (for non-trivial changes)
Reviewer's checklist:
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Any issues marked for closing are addressed -
There is a test suite reasonably covering new functionality or modifications -
Function naming, parameters, return values, types, etc., are consistent and according to CONTRIBUTION.md
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This feature/change has adequate documentation added -
No obvious mistakes in the code
Edited by Daiki Ueno