sdwdate and sdwdate-gui development thread

Development
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sdwdate improvements have been implemented in git master and Whonix developers repository:

  • sdwdate can now recover, successfully set the system clock even if system clock is so slow (year 2000) or fast (year 2050) so that Tor is unable to connect.
  • The time fetching part of sdwdate (abstracted as separate script url_to_unixtime so it can be more easily confined) is now a python3 requests based implementation with the following features:
    • HTTP header fetching
    • HTTP header parsing (we need the Date: field)
    • HTTP 1.0 and HTTP 1.1 compatibility
    • TLS support
    • socks support (for Tor configuration and stream isolation)

Issue of Most Onions Down due to a Denial of Service Attack on the Tor Network / sdwdate synchronisation fails, sometimes works - #4 by Patrick has not been addressed due to lack of a concept how sdwdate could fetch time if most onions are down most of the time.

Could use some help with apparmor / seccomp / systemd / sandbox-app-launcher confinement.

//cc @madaidan

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