Separate function for future reusing

[babenek]

Description

Please include a summary of the change and which is fixed.

• base64 decode function is extracted for reuse
• applied padding auto augmentation for base64 JWT which may be without padding
• ASN1 size check applied for small size case

How has this been tested?

Please describe the tests that you ran to verify your changes.

• UnitTest
• Benchmark

[codecov-commenter]

Codecov Report

Attention: 6 lines in your changes are missing coverage. Please review.

Comparison is base (841679e) 90.83% compared to head (cf06554) 90.81%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
credsweeper/filters/value_github_check.py	88.00%	1 Missing and 2 partials ⚠️
credsweeper/utils/util.py	80.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #470      +/-   ##
==========================================
- Coverage   90.83%   90.81%   -0.03%     
==========================================
  Files         123      124       +1     
  Lines        4169     4202      +33     
  Branches      658      663       +5     
==========================================
+ Hits         3787     3816      +29     
- Misses        252      254       +2     
- Partials      130      132       +2     

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[kmnls]

You always use (..., padding_safe=True, urlsafe_detect=True)
There is no need for code with False values of these parameters

[babenek]

You always use (..., padding_safe=True, urlsafe_detect=True) There is no need for code with False values of these parameters

I intend to use the function in PEM decoder https://github.com/Samsung/CredSweeper/pull/456/files#diff-9ebaed290816b8f8b45e2c2b198282a65c6fbc6b0584c0d0b5d55d3be88979a3

• there is no padding safe required

[kmnls]

See comment

[babenek]

See comment

Thank you for review. The issue was fixed.

[csh519]

decode_base64() method has been extracted from ValueBase64DataCheck filter.

LGTM 👍

[xDizzix]

[kmnls]

Agree