I'll look into this after 4.12 PR. Do not expect quick response. /Jarkko
On Wed, Mar 29, 2017 at 12:24:48PM +0200, Roberto Sassu wrote: > tpm_pcr_extend() was originally designed to extend a TPM 1.2 PCR with > a SHA1 digest. With TPM 2.0, multiple hash algorithms can be supported, > but, at the moment, only one digest can be passed to the function. > > Since TCG mandates that all PCR banks must be extended, commit c1f92b4 > (tpm: enhance TPM 2.0 PCR extend to support multiple banks) filled > the gap by padding the SHA1 digest passed to tpm_pcr_extend(), to extend > remaining PCR banks. > > This patch set adds support for providing a digest for each PCR bank. > > The first patch adds an additional check to tpm2_pcr_extend() to ensure > that all digests have been provided (to meet TCG specs). > > The second patch provides a mechanism for TPM users to convert a TPM > algorithm ID to a crypto ID and vice-versa, so that they can calculate > the digest of an event data by using the crypto subsystem. > > The third patch allows TPM users to know which hash algorithms the TPM > supports. Since the limit of active banks is fixed (the size of the > active_banks array in the tpm_chip structure), the new function > tpm_pcr_algorithms() accepts as input a sized array. > > The fourth patch introduces tpm_pcr_extend_digests(), which accepts > as input a sized array of tpm2_digest structures. Each array element > contains the algorithm and the digest for a PCR bank. > > Roberto Sassu (4): > tpm: check whether all digests have been provided for TPM 2.0 extend > tpm: introduce tpm2_pcr_algo_to_crypto() and > tpm2_pcr_algo_from_crypto() > tpm: introduce tpm_pcr_algorithms() > tpm: introduce tpm_extend_pcr_digests() > > drivers/char/tpm/tpm-interface.c | 121 > +++++++++++++++++++++++++++++++++++++++ > drivers/char/tpm/tpm.h | 19 +----- > drivers/char/tpm/tpm2-cmd.c | 65 +++++++++++---------- > include/linux/tpm.h | 44 ++++++++++++++ > 4 files changed, 200 insertions(+), 49 deletions(-) > > -- > 2.9.3 > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > tpmdd-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/tpmdd-devel ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ tpmdd-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/tpmdd-devel
