From: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
To: Mimi Zohar <zohar@linux.ibm.com>, 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>
Subject: Re: [RFC PATCH 0/8] ima-evm-utils: calculate per TPM bank template digest
Date: Mon, 24 Feb 2020 08:23:19 -0800 [thread overview]
Message-ID: <bb7370d7-6c20-69ef-edfa-f50d75859100@linux.microsoft.com> (raw)
In-Reply-To: <1582420362.10443.18.camel@linux.ibm.com>
On 2/22/20 5:12 PM, Mimi Zohar wrote:
>
> There are two aspects to Roberto's changes - extending the TPM banks
> with the bank specific template digest and verifying the boot
> aggregate. This patch set only addresses the first aspect.
>
> Assuming both the sha1 and sha256 TPM banks are enabled,
>
> # tssgetcapability -cap 5
> 2 PCR selections
> hash TPM_ALG_SHA1
> TPMS
> _PCR_SELECTION length 3
> ff ff ff
> hash TPM_ALG_SHA256
> TPMS_PC
> R_SELECTION length 3
> ff ff ff
>
> the output would look like:
>
> # evmctl ima_measurement -v --list
> /sys/kernel/security/integrity/ima/binary_runtime_measurements
>
> sha1: PCRAgg 10: 7723f6d980725507e5d0eb643dc179aae0efb719
> sha1: TPM PCR-10: 7723f6d980725507e5d0eb643dc179aae0efb719
> sha1 PCR-10: succeed
>
> sha256: PCRAgg 10:
> 5254d6dce62765f884dc67dac8d59a8721ae14495ae4a0cb73426d0c013a82b2
> sha256: TPM PCR-10:
> 5254d6dce62765f884dc67dac8d59a8721ae14495ae4a0cb73426d0c013a82b2
> sha256 PCR-10: succeed
>
Thanks Mimi and Roberto for the update.
tpm2_pcrread command outputs the PCR values.
The one for PCR-10 matches the data output by evmctl.
-lakshmi
prev parent reply other threads:[~2020-02-24 16:23 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-21 18:38 [RFC PATCH 0/8] ima-evm-utils: calculate per TPM bank template digest Mimi Zohar
2020-02-21 18:38 ` [RFC PATCH 1/8] ima-evm-utils: treat unallocated banks as an error Mimi Zohar
2020-02-21 18:38 ` [RFC PATCH 2/8] ima-evm-utils: increase the size of "zero" and "fox" variables Mimi Zohar
2020-02-21 18:38 ` [RFC PATCH 3/8] ima-evm-utils: calculate the digests for multiple TPM banks Mimi Zohar
2020-02-21 18:38 ` [RFC PATCH 4/8] ima-evm-utils: add support in tpm2_read_pcrs to read different " Mimi Zohar
2020-02-21 18:38 ` [RFC PATCH 5/8] ima-evm-utils: read the PCRs for the requested " Mimi Zohar
2020-02-21 18:38 ` [RFC PATCH 6/8] ima-evm-utils: compare re-calculated PCRs with the TPM values Mimi Zohar
2020-02-21 18:38 ` [RFC PATCH 7/8] ima-evm-utils: use a common bank variable for TPM 1.2 and TPM 2.0 Mimi Zohar
2020-02-21 18:38 ` [RFC PATCH 8/8] ima-evm-utils: remove TPM 1.2 specific code Mimi Zohar
2020-02-22 0:11 ` [RFC PATCH 0/8] ima-evm-utils: calculate per TPM bank template digest Lakshmi Ramasubramanian
2020-02-23 1:12 ` Mimi Zohar
2020-02-24 16:23 ` Lakshmi Ramasubramanian [this message]
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