[Backport 2.x] Refactor ASN1 call

[opensearch-trigger-bot]

Backport 7ddbf6a from #4729.

[codecov]

Codecov Report

Attention: Patch coverage is 71.42857% with 2 lines in your changes missing coverage. Please review.

Project coverage is 65.37%. Comparing base (ff7ac34) to head (aea8121).
Report is 4 commits behind head on 2.x.

Files with missing lines	Patch %	Lines
...ensearch/security/ssl/DefaultSecurityKeyStore.java	71.42%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              2.x    #4740      +/-   ##
==========================================
+ Coverage   65.36%   65.37%   +0.01%     
==========================================
  Files         317      317              
  Lines       22158    22163       +5     
  Branches     3581     3581              
==========================================
+ Hits        14483    14489       +6     
+ Misses       5879     5876       -3     
- Partials     1796     1798       +2     

Files with missing lines	Coverage Δ
...ensearch/security/ssl/DefaultSecurityKeyStore.java	73.65% <71.42%> (-0.14%)	⬇️

... and 4 files with indirect coverage changes