Increase envoy key size to 3072 bits#126
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ameowlia merged 1 commit intocloudfoundry:mainfrom Dec 1, 2025
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Summary
This PR increases the RSA private key size for container instance identity and c2c certificates from 2048 bits → 3072 bits in order to improve the overall security of mTLS communication.
A new test has been added to validate that the generated certificate’s public key length matches the required 3072-bit size.
Manual testing was performed to verify that mTLS negotiation between the container’s Envoy proxy and the Gorouter continues to function normally with the increased key size. No issues were observed.
There is no impact to existing deployments, and short-lived per-container certificates are regenerated automatically on container creation.
Backward Compatibility
Breaking Change? No