[RFC PATCH 0/8] ima-evm-utils: calculate per TPM bank template digest

From: Mimi Zohar <zohar@linux.ibm.com>
To: linux-integrity@vger.kernel.org
Cc: Roberto Sassu <roberto.sassu@huawei.com>,
	Vitaly Chikunov <vt@altlinux.org>,
	Patrick Uiterwijk <puiterwi@redhat.com>,
	Petr Vorel <pvorel@suse.cz>, Mimi Zohar <zohar@linux.ibm.com>
Subject: [RFC PATCH 0/8] ima-evm-utils: calculate per TPM bank template digest
Date: Fri, 21 Feb 2020 13:38:50 -0500	[thread overview]
Message-ID: <1582310338-1562-1-git-send-email-zohar@linux.ibm.com> (raw)

IMA currently extends the different TPM banks by padding/truncating the
SHA1 template digest.  Although the IMA measurement list only includes
the SHA1 template digest, the template digest could be re-calculated
properly for each bank.  Roberto Sassu's proposed "ima: support stronger
algorithms for attestation" kernel patch set makes this change.

In order to test the proposed kernel change, this patch set walks the
IMA measurement list, re-calculating the per TPM bank template digest
and extending the TPM bank PCR with the bank specific digest.  The last
step, after walking the measurement list, is comparing the the resulting
TPM per bank PCR values with the actual TPM per bank PCR values.

(Verifying the non SHA1 TPM banks depends on a kernel built with
Roberto's "ima: support stronger algorithms for attestation" patch set.)

Mimi

Mimi Zohar (8):
  ima-evm-utils: treat unallocated banks as an error
  ima-evm-utils: increase the size of "zero" and "fox" variables
  ima-evm-utils: calculate the digests for multiple TPM banks
  ima-evm-utils: add support in tpm2_read_pcrs to read different TPM
    banks
  ima-evm-utils: read the PCRs for the requested TPM banks
  ima-evm-utils: compare re-calculated PCRs with the TPM values
  ima-evm-utils: use a common bank variable for TPM 1.2 and TPM 2.0
  ima-evm-utils: remove TPM 1.2 specific code

 src/evmctl.c | 349 ++++++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 284 insertions(+), 65 deletions(-)

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2.7.5