MS Store cert pinning updates (1.11) #5735
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## Change New certificate pinning guidelines/PKI allow us to pin only a trusted intermediate. This means less churn due to renewals with the Store. Adds functionality to the pinning validation to allow partial chain definitions. This is leveraged to allow chains containing two new intermediate certificates The existing chains are left as is since they continue to be the current in-operation values. ## Validation Adds new tests covering partial chain definitions, etc. Adds a new test to warn about the remaining lifetime of pinning certificates.
yao-msft
approved these changes
Sep 22, 2025
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Cherry-pick #5732 to 1.11
Change
New certificate pinning guidelines/PKI allow us to pin only a trusted intermediate. This means less churn due to renewals with the Store.
Adds functionality to the pinning validation to allow partial chain definitions. This is leveraged to allow chains containing two new intermediate certificates
The existing chains are left as is since they continue to be the current in-operation values.
Validation
Adds new tests covering partial chain definitions, etc.
Adds a new test to warn about the remaining lifetime of pinning certificates.
Microsoft Reviewers: Open in CodeFlow