cd9cb944d9
Previously, NV index mode only supported persistent handles which are
only for TPM objects.
On the other hand, the "NV index" handle allows the user-defined data,
so it can be an alternative to the key file and support TPM 2.0 Key
File format immediately.
The following tpm2-tools commands store the given key file, sealed.tpm,
in either TPM 2.0 Key File format or the raw format into the NV index
handle 0x1000000.
# tpm2_nvdefine -C o \
-a "ownerread|ownerwrite" \
-s $(stat -c %s sealed.tpm) \
0x1000000
# tpm2_nvwrite -C o -i sealed.tpm 0x1000000
To unseal the key in GRUB, add the "tpm2_key_protector_init" command to
grub.cfg:
tpm2_key_protector_init --mode=nv --nvindex=0x1000000
cryptomount -u <UUID> --protector tpm2
To remove the NV index handle:
# tpm2_nvundefine -C o 0x1000000
Signed-off-by: Gary Lin <glin@suse.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.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'