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FDEunlock – Check and unlock full disk encrypted systems via ssh
This script allows you to unlock full disk encrypted GNU/Linux systems via ssh after checking that the system has not been tampered with.
Checkout the following example:
fdeunlock --host fde-server.example.org-initramfs INFO, 2017-03-29 10:27:41,822: Host offline. Attempting to start using: virsh -c qemu:///system start fde-server Domain fde-server started INFO, 2017-03-29 10:27:42,726: Start command returned with: 0 INFO, 2017-03-29 10:27:48,257: Host offline. Waiting … INFO, 2017-03-29 10:27:53,264: Ping result: 198.51.100.23 : [0], 84 bytes, 0.51 ms (0.51 avg, 0% loss) INFO, 2017-03-29 10:27:53,270: Running Network based checkers: LinkLayerAddressChecker, UnauthenticatedLatencyChecker INFO, 2017-03-29 10:27:53,273: Link layer address matches the trusted once. INFO, 2017-03-29 10:27:53,283: ICMP ping round trip time: 0.5100 ms INFO, 2017-03-29 10:27:53,283: Latency is within the boundaries. INFO, 2017-03-29 10:27:54,296: SSH session to initramfs established. INFO, 2017-03-29 10:27:54,296: Running SSH based checkers: ChecksumChecker, AuthenticatedLatencyChecker INFO, 2017-03-29 10:27:57,487: Checksums match the trusted once. INFO, 2017-03-29 10:27:57,559: Latency to execute a command over SSH and get the response back: 71.6000 ms INFO, 2017-03-29 10:27:57,560: Trusted latency: 60.256694030762 INFO, 2017-03-29 10:27:57,560: Current latency: 71.61283493041992 Choose one of 'save', 'ignore' (for current run) or anything else to exit: save INFO, 2017-03-29 10:28:02,739: All 4 checks passed. INFO, 2017-03-29 10:28:02,820: Passing key for vda3_crypt to host fde-server.example.org-initramfs. INFO, 2017-03-29 10:28:05,140: Could not retrieve key for vdb3_crypt (host fde-server.example.org-initramfs). Please enter key for vdb3_crypt (or store it in a vault): INFO, 2017-03-29 10:28:28,155: Passing key for vdb3_crypt to host fde-server.example.org-initramfs. INFO, 2017-03-29 10:28:43,322: System should be booting now.
The host fde-server.example.org-initramfs was defined in the ssh
configuration ~/.ssh/config and the key for vda3_crypt was provided
in
/home/user/.config/fdeunlock/keys/fde-server.example.org-initramfs_vda3_crypt.key.
And last but not least, the start command was configured in
/home/user/.config/fdeunlock/config.cfg.