nettle: restrict output size of HKDF-Expand to 255 * HashLen
nettle: restrict output size of HKDF-Expand to 255 * HashLen
RFC 5869 2.3 requires that requested output length of HKDF-Expand to be equal to or less than 255 times hash output size.
Inspired by the report by Guido Vranken in: https://lists.gnupg.org/pipermail/gcrypt-devel/2022-June/005328.html
Checklist
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Commits have Signed-off-by:
with name/author being identical to the commit author -
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) -
CI timeout is 2h or higher (see Settings/CICD/General pipelines/Timeout)
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 Alexander Sosedkin