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Currently with the TPM2 protector, only SRK mode is supported and NV index support is just a stub. Implement the NV index option. Note: This only extends support on the unseal path. grub-protect has not been updated. tpm2-tools can be used to insert a key into the NV index. An example of inserting a key using tpm2-tools: # Get random key. tpm2_getrandom 32 > key.dat # Create primary object. tpm2_createprimary -C o -g sha256 -G ecc -c primary.ctx # Create policy object. `pcrs.dat` contains the PCR values to seal against. tpm2_startauthsession -S session.dat tpm2_policypcr -S session.dat -l sha256:7,11 -f pcrs.dat -L policy.dat tpm2_flushcontext session.dat # Seal key into TPM. cat key.dat | tpm2_create -C primary.ctx -u key.pub -r key.priv -L policy.dat -i- tpm2_load -C primary.ctx -u key.pub -r key.priv -n sealing.name -c sealing.ctx tpm2_evictcontrol -C o -c sealing.ctx 0x81000000 Then to unseal the key in GRUB, add this to grub.cfg: tpm2_key_protector_init --mode=nv --nvindex=0x81000000 --pcrs=7,11 cryptomount -u <UUID> --protector tpm2 Signed-off-by: Patrick Colp <patrick.colp@oracle.com> Signed-off-by: Gary Lin <glin@suse.com> Reviewed-by: Stefan Berger <stefanb@linux.ibm.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Tested-by: Stefan Berger <stefanb@linux.ibm.com>
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. See the file MAINTAINERS for information about the GRUB maintainers, etc. If you found a security vulnerability in the GRUB please check the SECURITY file to get more information how to properly report this kind of bugs to the maintainers. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'