Add missing crypto_validator

[gpotter2]

fixes #4863

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.87%. Comparing base (ef72e1d) to head (7e761a0).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4870      +/-   ##
==========================================
+ Coverage   80.48%   80.87%   +0.38%     
==========================================
  Files         368      368              
  Lines       90255    90256       +1     
==========================================
+ Hits        72645    72992     +347     
+ Misses      17610    17264     -346     

Files with missing lines	Coverage Δ
scapy/layers/tls/handshake.py	88.34% <100.00%> (+0.01%)	⬆️

... and 21 files with indirect coverage changes

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