mirror of
https://github.com/linuxboot/heads.git
synced 2025-01-16 01:39:53 +00:00
71 lines
1.9 KiB
Bash
71 lines
1.9 KiB
Bash
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#!/bin/sh
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# /boot/boot.sh -- Startup Qubes
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#
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# The signature on this script will be verified by the ROM,
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# and this script lives on the /boot partition to allow
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# the system owner to change the specific Qubes boot parameters
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#
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# This depends on the PCR 4 being "normal-boot":
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# f8fa3b6e32e7c6fe04c366e74636e505b28f3b0d
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# which is only set if the top level /init script has started
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# without user intervention or dropping into a recovery shell.
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#
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# To sign this script and the other bootable components:
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#
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# gpg -a --sign --detach-sign boot.sh
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#
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XEN=/boot/xen-4.6.4.heads
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INITRD=/boot/initramfs-4.4.38-11.pvops.qubes.x86_64.img
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KERNEL=/boot/vmlinuz-4.4.38-11.pvops.qubes.x86_64
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recovery() {
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echo >&2 "!!!!! $@"
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rm -f /tmp/secret.key
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tpm extend -ix 4 -if recovery
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echo >&2 "!!!!! Starting recovery shell"
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exec /bin/ash
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}
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. /config
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echo "+++ Checking $XEN"
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gpgv "${XEN}.asc" "${XEN}" \
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|| recovery 'Xen signature failed'
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echo "+++ Checking $INITRD"
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gpgv "${INITRD}.asc" "${INITRD}" \
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|| recovery 'Initrd signature failed'
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echo "+++ Checking $KERNEL"
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gpgv "${KERNEL}.asc" "${KERNEL}" \
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|| recovery 'Kernel signature failed'
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# Measure the LUKS headers before we unseal the disk key
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qubes-measure-luks $CONFIG_QUBES_DEVS \
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|| recovery "LUKS measure failed"
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# Attempt to unseal the disk key from the TPM
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# should we give this some number of tries?
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unseal-key \
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|| recovery 'Unseal disk key failed. Starting recovery shell'
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# command line arguments are include in the signature on this script,
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# although the root UUID should be specified in some better manner.
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kexec \
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-l \
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--module "${KERNEL} root=UUID=257b593f-d4ae-46ee-b499-14bc9ffd37d4 ro rd.qubes.hide_all_usb" \
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--module "${INITRD}" \
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--command-line "no-real-mode reboot=no" \
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"${XEN}" \
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|| recovery "kexec load failed"
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# Last step is to override PCR 4 so that user can't read the key
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tpm extend -ix 4 -ic qubes \
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|| recovery 'Unable to scramble PCR'
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echo "+++ Starting Qubes..."
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exec kexec -e
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