On Fri, Feb 01, 2019 at 11:06:41AM +0100, Roberto Sassu wrote: > Currently, tpm_pcr_extend() accepts as an input only a SHA1 digest. > > This patch replaces the hash parameter of tpm_pcr_extend() with an array of > tpm_digest structures, so that the caller can provide a digest for each PCR > bank currently allocated in the TPM. > > tpm_pcr_extend() will not extend banks for which no digest was provided, > as it happened before this patch, but instead it requires that callers > provide the full set of digests. Since the number of digests will always be > chip->nr_allocated_banks, the count parameter has been removed. > > Due to the API change, ima_pcr_extend() and pcrlock() have been modified. > Since the number of allocated banks is not known in advance, the memory for > the digests must be dynamically allocated. To avoid performance degradation > and to avoid that a PCR extend is not done due to lack of memory, the array > of tpm_digest structures is allocated by the users of the TPM driver at > initialization time. > > Signed-off-by: Roberto Sassu <roberto.sassu@xxxxxxxxxx> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx> /Jarkko
