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52992664ea
cbfs-init: remove temp files, measure direct cbfs output, extend PCR with proper introspection tracing flash.sh: do not die but go to recovery if flashrom fails, cosmetic fix for warning given to user kexec-insert-key: extend PCR with proper introspection tracing kexec-select-boot: extend PCR with proper introspection tracing kexec-measure-luks: extend PCR with proper introspection tracing tpmr: Add missing TRACE_FUNC, fix comments, extend give hash that was extended to tpm call in DEBUG, fix TPM startsession unsuppressed output still present ash_functions: extend PCR with proper introspection tracing insmod: DEBUG info more pertinent, extend PCR with proper introspection tracing Signed-off-by: Thierry Laurion <insurgo@riseup.net>
58 lines
1.5 KiB
Bash
Executable File
58 lines
1.5 KiB
Bash
Executable File
#!/bin/bash
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# extend a TPM PCR with a module and then load it
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# any arguments will also be measured.
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# The default PCR to be extended is 5, but can be
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# overridden with the MODULE_PCR environment variable
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. /etc/functions
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TRACE_FUNC
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MODULE="$1"; shift
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if [ -z "$MODULE_PCR" ]; then
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MODULE_PCR=5
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fi
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if [ -z "$MODULE" ]; then
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die "Usage: $0 module [args...]"
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fi
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if [ ! -r "$MODULE" ]; then
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die "$MODULE: not found?"
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fi
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# Check if module is already loaded
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# Transform module name changing _ for - and trailing .ko if present
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# Unify lsmod output to use - instead of _ for comparison
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module_name=$(basename "$MODULE" | sed 's/_/-/g' | sed 's/\.ko$//')
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if lsmod | sed 's/_/-/g' | grep -q "^$module_name\\b"; then
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DEBUG "$MODULE: already loaded, skipping"
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exit 0
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fi
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if [ ! -r /sys/class/tpm/tpm0/pcrs -o ! -x /bin/tpm ]; then
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if [ ! -c /dev/tpmrm0 -o ! -x /bin/tpm2 ]; then
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tpm_missing=1
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fi
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fi
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if [ -z "$tpm_missing" ]; then
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echo "TPM: Extending PCR[$MODULE_PCR] with $MODULE prior of loading into kernel"
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tpmr extend -ix "$MODULE_PCR" -if "$MODULE" \
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|| die "$MODULE: tpm extend failed"
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fi
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if [ ! -z "$*" -a -z "$tpm_missing" ]; then
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echo "TPM: Extending PCR[$MODULE_PCR] with $MODULE prior of loading into kernel"
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tpmr extend -ix "$MODULE_PCR" -if "$MODULE" \
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|| die "$MODULE: tpm extend on arguments failed"
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fi
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# Since we have replaced the real insmod, we must invoke
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# the busybox insmod via the original executable
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DEBUG "Loading $MODULE with busybox insmod"
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busybox insmod "$MODULE" "$@" \
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|| die "$MODULE: insmod failed"
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