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35 lines
641 B
Bash
Executable File
35 lines
641 B
Bash
Executable File
#!/bin/sh
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# This will unseal and unecncrypt the drive encryption key from the TPM
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# It will then need to be bundled into initrd that is booted with Qubes.
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TPM_INDEX=3
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TPM_SIZE=312
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die() { echo >&2 "$@"; exit 1; }
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warn() { echo >&2 "$@"; }
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key_file="$1"
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if [ -z "$key_file" ]; then
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key_file=/tmp/secret.key
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fi
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read -s -p "Encryption password: " tpm_password
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echo
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nv_readvalue \
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-in "$TPM_INDEX" \
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-sz "$TPM_SIZE" \
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-of /tmp/sealed \
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|| die "Unable to read key from TPM NVRAM"
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unsealfile \
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-if /tmp/sealed \
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-of "$key_file" \
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-pwdd "$tpm_password" \
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-hk 40000000 \
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|| die "Unable to unseal disk encryption key"
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rm /tmp/sealed
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