Hi, What do you think about this patch?
Regards, Mickaël On 02/10/2020 09:18, Mickaël Salaün wrote: > From: Mickaël Salaün <m...@linux.microsoft.com> > > Add a new DM_VERITY_VERIFY_ROOTHASH_SIG_SECONDARY_KEYRING configuration > to enable dm-verity signatures to be verified against the secondary > trusted keyring. This allows certificate updates without kernel update > and reboot, aligning with module and kernel (kexec) signature > verifications. > > Signed-off-by: Mickaël Salaün <m...@linux.microsoft.com> > Cc: Jaskaran Khurana <jaskarankhur...@linux.microsoft.com> > Cc: Mike Snitzer <snit...@redhat.com> > Cc: Milan Broz <gmazyl...@gmail.com> > --- > drivers/md/Kconfig | 13 ++++++++++++- > drivers/md/dm-verity-verify-sig.c | 9 +++++++-- > 2 files changed, 19 insertions(+), 3 deletions(-) > > diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig > index 30ba3573626c..63870fdfe8ce 100644 > --- a/drivers/md/Kconfig > +++ b/drivers/md/Kconfig > @@ -530,11 +530,22 @@ config DM_VERITY_VERIFY_ROOTHASH_SIG > bool "Verity data device root hash signature verification support" > depends on DM_VERITY > select SYSTEM_DATA_VERIFICATION > - help > + ---help--- > Add ability for dm-verity device to be validated if the > pre-generated tree of cryptographic checksums passed has a pkcs#7 > signature file that can validate the roothash of the tree. > > + By default, rely on the builtin trusted keyring. > + > + If unsure, say N. > + > +config DM_VERITY_VERIFY_ROOTHASH_SIG_SECONDARY_KEYRING > + bool "Verity data device root hash signature verification with > secondary keyring" > + depends on DM_VERITY_VERIFY_ROOTHASH_SIG > + depends on SECONDARY_TRUSTED_KEYRING > + ---help--- > + Rely on the secondary trusted keyring to verify dm-verity signatures. > + > If unsure, say N. > > config DM_VERITY_FEC > diff --git a/drivers/md/dm-verity-verify-sig.c > b/drivers/md/dm-verity-verify-sig.c > index 614e43db93aa..29385dc470d5 100644 > --- a/drivers/md/dm-verity-verify-sig.c > +++ b/drivers/md/dm-verity-verify-sig.c > @@ -119,8 +119,13 @@ int verity_verify_root_hash(const void *root_hash, > size_t root_hash_len, > } > > ret = verify_pkcs7_signature(root_hash, root_hash_len, sig_data, > - sig_len, NULL, VERIFYING_UNSPECIFIED_SIGNATURE, > - NULL, NULL); > + sig_len, > +#ifdef CONFIG_DM_VERITY_VERIFY_ROOTHASH_SIG_SECONDARY_KEYRING > + VERIFY_USE_SECONDARY_KEYRING, > +#else > + NULL, > +#endif > + VERIFYING_UNSPECIFIED_SIGNATURE, NULL, NULL); > > return ret; > } >
