Support xpc_connection_set_peer_sig on macOS 12 #36
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This also adds built in support for client validation using audit tokens on macOS <= 11.x if the audit_token feature is enabled.
If users try to use client validation without the audit_token feature enabled on macOS <= 11.x then clients will silently be rejected. I've opened an issue to discuss adding logging.
I tested this on macOS 11 with the audit_token feature enabled and disabled, with and without code signing requirements enabled, and using clients that match and do not match the code signing requirements.
I'll add some tests soon, I'll think about the best way to drive them with the different combinations of code signing and multiple build configurations.