Use syscall.Stdin for input handle. Fixes #1153

[mdp]

Summary

Cosign currently passes in the int '0' for the Stdin handle when reading from term. This unfortunately doesn't work on Windows, and should actually use syscall.Stdin to get the platform specific Stdin handle.

Ticket Link

Fixes #1153

Release Note

• Bugfix to handle input on Windows platforms without crashing.

[dlorenc]

Thanks for the fix!

[codecov-commenter]

Codecov Report

Merging #1657 (ec355ee) into main (340b6c6) will decrease coverage by 0.01%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #1657      +/-   ##
==========================================
- Coverage   28.81%   28.79%   -0.02%     
==========================================
  Files         139      139              
  Lines        8139     8143       +4     
==========================================
  Hits         2345     2345              
- Misses       5542     5546       +4     
  Partials      252      252              

Impacted Files	Coverage Δ
pkg/cosign/common.go	0.00% <0.00%> (ø)

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[mdp]

Sorry about spamming the CI/PR, let me figure out this lint issue on my own fork and I'll push when it's ready (it has to do with unconvert detecting an uneccessary conversion of 'int' on *nix but it's a uintptr on windows)

[mdp]

This should be working now and rebased onto the latest main branch. I "nolint'd" the int conversion, but the alternative is to build a platform specific ReadPassword to handle the int vs uintptr divergence. Happy to quickly build that out if you think it's the right direction.