cbfs-init used to measure filenames as well as the data in the files,
but after refactoring it only measures file data. This means files
could be renamed, or contents pivoted, without affecting the PCR
measurements. Bring back the filename measurement.
Similarly, insmod used to measure module parameters, but no longer
does. Though we don't currently insert any modules with parameters,
there's no reason to leave this open to break later, bring back the
measurement.
Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
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>
Exception: scripts sourcing/calls within etc/ash_functions continues to use old TRACE functions until we switch to bash completely getting rid of ash.
This would mean getting rid of legacy boards (flash + legacy boards which do not have enough space for bash in flash boards) once and for all.
Signed-off-by: Thierry Laurion <insurgo@riseup.net>
-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
This addresses multiple issues:
* Issue #63: initrd is build fresh each time, so tracked files do not matter.
* Issue #144: build time configuration
* Issue #123: allows us to customize the startup experience
* Issue #122: manual start-xen will go away
* Issue #25: tpmtotp PCRs are updated after reading the secret
* Issue #16: insmod now meaures modules
