Fix checksum doesn't match error

[umbynos]

Please check if the PR fulfills these requirements

• The PR has no duplicates (please search among the Pull Requests
  before creating one)
• Tests for the changes have been added (for bug fixes / features)

• What kind of change does this PR introduce?

Bug Fix

• What is the current behavior?

Close #920

• What is the new behavior?

The checksum is properly verified, keeping into account the padding that could be present in the archives

• Does this PR introduce a breaking change?

no

• Other information:

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 78.57143% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 20.78%. Comparing base (dafef3c) to head (353057e).
Report is 5 commits behind head on main.

Files	Patch %	Lines
v2/pkgs/tools.go	78.57%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #923      +/-   ##
==========================================
- Coverage   20.94%   20.78%   -0.17%     
==========================================
  Files          43       43              
  Lines        3161     3200      +39     
==========================================
+ Hits          662      665       +3     
- Misses       2403     2436      +33     
- Partials       96       99       +3     

Flag	Coverage Δ
unit	20.78% <78.57%> (-0.17%)	⬇️

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[alessio-perugini]

🤯 this will add a bit of overhead memory-wise. If we see some users pointing out memory-related problems it might be this. However, I don't expect this to be a problem as most of the tools are very small in size.
Well done 🙌