[fips140][configtls.TestTPM_loadCertificate] Skip test if GODEBUG=fips140=only is set

[ycombinator]

Description

When #13926 is merged, all unit tests in this repository will be run with GODEBUG=fips140=only to help surface any FIPS-140 violations in all the Go modules in this repository.

One such unit test that fails in these circumstances is config/configtls.TestTPM_loadCertificate. However, the FIPS violation surfaced by this test is from the test code itself (as opposed to from OpenTelemetry Collector core code that the test is exercising), specifically when this call is made:

opentelemetry-collector/config/configtls/tpm_test.go

Line 191 in 974da01

tpmKey, err := keyfile.NewLoadableKey(tpm, tpm2.TPMAlgECC, 256, []byte(""))

As such, this is not a FIPS violation we need to worry about when running the OpenTelemetry Collector. To prevent the unit test from failing when it's run with GODEBUG=fips140=only, we skip it.

Link to tracking issue

Fixes #13989

Testing

Run the configtls.TestTPM_loadCertificate unit test with GODEBUG=fips140=only. Make sure OS is Linux and Go version is >= 1.24.6.

$ cd config/configtls/
$ GODEBUG=fips140=only go test ./... -test.run TestTPM_loadCertificate

[codspeed-hq]

CodSpeed Performance Report

Merging #14225 will not alter performance

_{Comparing ycombinator:fips-skip-cfb (e283e54) with main (974da01)}

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

Summary

✅ 71 untouched

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.11%. Comparing base (974da01) to head (e283e54).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14225      +/-   ##
==========================================
- Coverage   92.15%   92.11%   -0.04%     
==========================================
  Files         667      667              
  Lines       41446    41446              
==========================================
- Hits        38194    38179      -15     
- Misses       2215     2225      +10     
- Partials     1037     1042       +5     

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