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From: "Chang, Clay (HPS OE-Linux TDC)" <clayc@hpe.com>
To: "linux-integrity@vger.kernel.org" <linux-integrity@vger.kernel.org>
Subject: IMA appraisal with TPMv2?
Date: Wed, 6 Jan 2021 10:47:22 +0000	[thread overview]
Message-ID: <CS1PR8401MB036099EF243892F90D07D56CBCD00@CS1PR8401MB0360.NAMPRD84.PROD.OUTLOOK.COM> (raw)

Hi,

As I know, IMA appraisal with digital signature uses the public key on the .ima 
keyring for verification, and the public key needs to be signed by a certificate 
embedded into the kernel (CONFIG_SYSTEM_EXTRA_CERTIFICATE). While this approach 
looks fine, it requires kernel re-gen and re-sign in the context of secure boot.

My question is that for IMA appraisal, is it possible to verify the signature 
with the TPMv2? My intention is leverage the TPMv2 device and to avoid the 
kernel re-gen/re-sign.

For signing, I know I need a tool that uses TPMv2 to sign the executable and 
write the signature to the xattr of the file.

Thanks,
Clay

             reply	other threads:[~2021-01-06 10:48 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-06 10:47 Chang, Clay (HPS OE-Linux TDC) [this message]
2021-01-12 22:28 ` IMA appraisal with TPMv2? Ken Goldman

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