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https://github.com/linuxboot/heads.git
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6923fb5e20
-coreboot support of TPM v2.0 (shared config for TPM2 support across all 4 previous variations) -swtpm set to be launched under TPM v2.0 mode under board config -Documentation file under each board.md softlinks to qemu-coreboot-fbwhiptail-tpm1.md (which has been generalized) This is skeleton for TPM v2 integration under Heads ------------- WiP TODO: - libcurl cannot be built as a tpm2-tools dependency as of now not sure why. curl currently needs to be added in board config to be built - Note: tpm-reset (master and here) needs some review, no handle of no tpm use case. Caller is responsible to not call it otherwise does nothing - init tries to bind fd and fails currently - Note: Check if whiptail is different of fbwhiptail in clearing screen. As of now every clear seems to be removed, still whiptail clears previous console output - When no OS' /boot can be mounted, do not try to TPM reset (will fail) - seal-hotpkey is not working properly - setting disk unlock key asks for TPM ownership passphrase (sealing in NV requires ownership, but text is misleading user as if reowning TPM) - We should cache input, feed tpm behind the scene and wipe passphrase and state clearly that this is TPM disk unlock kye passphrase. - primary key from TPM2 is invalid most of the time from kexec-select-boot and verifying global hashes but is setuped correctly at disk unlock key setup - would be nice to take advantage of bash function tracing to understand where we are for debugging purposes, code takes ash in consideration only - tpmr says it implements nv calls but actually doesn't. Removing those falsely wrapped functions would help. - Implementing them would be better - REVIEW TODOS IN CODE - READD CIRCLECI CONFIG Current state: - TPM unseal works without disk unlock key and generates TOTP properly (was missing die condition at unseal to not produce always good TOTP even if invalid) - TPM disk encryption key fails. Hypothesis is that sealing with USB drivers loaded and measures in inconsistent with sealed with/without. - TPM disk unsealing happens without USB modules being loaded in non-HOTP setup. This fails. - Current tests are with fbwhiptail (no clear called so having traces on command line of what happens) - Testing with HOTP implementation for sealing/unsealing since that forces USB module loads on each boot to remove this from failing possibilities
34 lines
860 B
Bash
Executable File
34 lines
860 B
Bash
Executable File
#!/bin/ash
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set -e -o pipefail
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. /etc/functions
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TRACE "Under /bin/cbfs-init"
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# Update initrd with CBFS files
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if [ -z "$CONFIG_PCR" ]; then
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CONFIG_PCR=7
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fi
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# Load individual files
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cbfsfiles=`cbfs -t 50 -l 2>/dev/null | grep "^heads/initrd/"`
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for cbfsname in `echo $cbfsfiles`; do
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filename=${cbfsname:12}
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if [ ! -z "$filename" ]; then
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echo "Loading $filename from CBFS"
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mkdir -p `dirname $filename` \
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|| die "$filename: mkdir failed"
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cbfs -t 50 -r $cbfsname > "$filename" \
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|| die "$filename: cbfs file read failed"
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if [ "$CONFIG_TPM" = "y" -o "$CONFIG_TPM2_TOOLS" = "y" ]; then
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TMPFILE=/tmp/cbfs.$$
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echo "$filename" > $TMPFILE
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cat $filename >> $TMPFILE
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tpmr extend -ix "$CONFIG_PCR" -if $TMPFILE \
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|| die "$filename: tpm extend failed"
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fi
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fi
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done
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# TODO: copy CBFS file named "heads/initrd.tgz" to /tmp, measure and extract
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