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25 lines
856 B
Bash
Executable File
25 lines
856 B
Bash
Executable File
#!/bin/bash
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# Measure all of the LUKS Disk Encryption headers into
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# a PCR so that we can detect disk swap attacks.
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. /etc/functions
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TRACE "Under /bin/qubes-measure-luks"
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DEBUG "Arguments passed to qubes-measure-luks: $@"
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# Measure the LUKS headers into PCR 6
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for dev in "$@"; do
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DEBUG "Storing LUKS header for $dev into /tmp/lukshdr-$(echo "$dev" | sed 's/\//_/g')"
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cryptsetup luksHeaderBackup $dev \
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--header-backup-file /tmp/lukshdr-$(echo "$dev" | sed 's/\//_/g') ||
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die "$dev: Unable to read LUKS header"
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done
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DEBUG "Hashing LUKS headers into /tmp/luksDump.txt"
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sha256sum /tmp/lukshdr-* >/tmp/luksDump.txt || die "Unable to hash LUKS headers"
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DEBUG "Removing /tmp/lukshdr-*"
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rm /tmp/lukshdr-*
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DEBUG "Extending TPM PCR 6 with hash of LUKS headers from /tmp/luksDump.txt"
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tpmr extend -ix 6 -if /tmp/luksDump.txt ||
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die "Unable to extend PCR"
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