So far we relied that the temporary file logic would create the key files with 0600 mode, but let's set the access mode explicitly: 1. Tighten private key file access from 0600 to 0400, after all we never want to write it again, it's not a mutable file. 2. Relaxed public key file access mode from 0600 to 0444, after all it's a public key file, and people should be able to see it if they want This is useful for propagating the key onto other systems if needed.
System and Service Manager
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