feat(entra): add MT.1198 app registration certificate lifetime test - #2130
feat(entra): add MT.1198 app registration certificate lifetime test#2130simon-vedder wants to merge 3 commits into
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: Path: .coderabbit.yaml Review profile: CHILL Plan: Pro Plus Run ID: 📒 Files selected for processing (3)
Included review availability: Your plan provides up to 4 included reviews per hour; 2 remain after this review. 📝 WalkthroughWalkthroughAdds and exports ChangesCertificate lifetime compliance test
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Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to The PR adds a bounded certificate-lifetime check and related documentation, with reported tests and validation passing; no actionable merge-blocking risk remains. Sequence Diagram(s)sequenceDiagram
participant Maester
participant Test-MtAppRegistrationCertificateLifetime
participant MicrosoftGraph
participant MaesterResultDetails
Maester->>Test-MtAppRegistrationCertificateLifetime: Invoke MT.1198 check
Test-MtAppRegistrationCertificateLifetime->>MicrosoftGraph: Retrieve app registrations and certificates
MicrosoftGraph-->>Test-MtAppRegistrationCertificateLifetime: Return certificate data
Test-MtAppRegistrationCertificateLifetime->>Test-MtAppRegistrationCertificateLifetime: Filter expired and excessive-lifetime certificates
Test-MtAppRegistrationCertificateLifetime->>MaesterResultDetails: Report test result
Suggested reviewers: 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
Full details: Description checkExplanation The description covers the change, implementation details, testing, documentation, and additional information. It includes all required template sections; no issue-closing number is stated, but this is non-critical because the PR does not claim to close an issue. Full details: Docstring CoverageExplanation No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (3 skipped: 3 unsupported.) ✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In
`@powershell/public/maester/entra/Test-MtAppRegistrationCertificateLifetime.ps1`:
- Around line 69-70: Update the certificate compliance check in the validityDays
flow to compare the unrounded ($endDateTime - $startDateTime).TotalDays value
against $MaximumValidityDays, while retaining rounding only for display or
reporting. Add a regression test covering a certificate lifetime of 365 days
plus one second and verify it is noncompliant when the maximum is 365 days.
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powershell/Maester.psd1powershell/public/maester/entra/Test-MtAppRegistrationCertificateLifetime.mdpowershell/public/maester/entra/Test-MtAppRegistrationCertificateLifetime.ps1powershell/tests/functions/Test-MtAppRegistrationCertificateLifetime.Tests.ps1tests/Maester/Entra/Test-AppRegistrations.Tests.ps1tests/maester-config.jsonwebsite/contributors/contributors.yml
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@copilot resolve the merge conflicts in this pull request |
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Inline comments:
In `@tests/maester-config.json`:
- Line 1555: Update the JSON entry identified by "Id": "MT.1196" by adding the
missing comma after the preceding "MT.1198" object, ensuring
tests/maester-config.json remains valid JSON.
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powershell/Maester.psd1tests/maester-config.jsonwebsite/contributors/contributors.yml
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App management policies only constrain credentials that are added after the policy takes effect. Their restrictForAppsCreatedAfterDateTime property means certificates that already exist are grandfathered in and are never re-evaluated, so a tenant can pass Test-MtAppManagementPolicyEnabled and still authenticate with multi-year certificates. Test-MtAppRegistrationCertificateLifetime reports certificates whose validity period exceeds MaximumValidityDays. The default of 365 days matches the asymmetricKeyLifetime of the sample app management policy documented in Test-MtAppManagementPolicyEnabled. Certificates that have already expired can no longer be used to authenticate and are out of scope. Adds no new Graph scopes; Directory.Read.All already covers the query.
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Rounding the validity period to whole days before the comparison let a certificate that is valid for slightly longer than MaximumValidityDays round down and pass. A certificate issued for 365 days and one second was reported as compliant against the 365 day default. Compare the exact TotalDays value and round up only for display, so a reported certificate never reads as being within the maximum. Adds a regression test for the sub-day case and derives both mock dates from a single timestamp, because two Get-Date calls drift by microseconds and skew the expected day count.
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Rebased onto I also addressed the review finding on the lifetime comparison. The validity period was rounded to whole days before being compared, so a certificate valid for 365 days and one second rounded down to 365 and passed against the 365 day default — the window reached almost half a day. The comparison now uses the exact Added a regression test for that sub-day case. The mock helper now derives both dates from a single timestamp; two separate
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2 participants
📑 Description
Adds MT.1198, which reports app registration certificates that were issued with an excessive validity period (default: longer than 365 days).
App management policies only constrain credentials added after the policy takes effect. Their
restrictForAppsCreatedAfterDateTimeproperty means certificates that already exist are grandfathered in and are never re-evaluated, so a tenant can passTest-MtAppManagementPolicyEnabledand still authenticate with multi-year certificates. A stolen private key stays usable for the entire remaining validity period.Nothing in the repo looks at credential validity today —
endDateTimedoes not appear anywhere underpowershell/public/ortests/.Test-MtAppRegistrationsWithSecretscovers secrets by flagging any use of them, but certificate lifetime is unchecked.Test-MtAppRegistrationCertificateLifetime, parameter-MaximumValidityDays(default 365, matching theasymmetricKeyLifetimeof the sample policy documented inTest-MtAppManagementPolicyEnabled)SignandVerifyusage is counted once, grouped bycustomKeyIdentifierDirectory.Read.Allis already part ofGet-MtGraphScopeThe second commit adds a
contributors.ymlentry.✅ Checks
/powershell/tests/pester.ps1locally.ℹ️ Additional Information
Verified locally on macOS / PowerShell 7.6.4:
powershell/tests/functions/Test-MtAppRegistrationCertificateLifetime.Tests.ps1./powershell/tests/pester.ps1with Pester 5.7.1 — 10,364 tests, 0 failures./build/Build-MaesterModule.ps1+./build/Test-MaesterModuleOutput.ps1passA follow-up test for credentials that are expired or expiring soon (certificates and secrets) is reserved as MT.1199 and will be submitted separately.
Summary by CodeRabbit
New Features
Documentation
Tests
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