Oh, get you, James. Understand, thanks for your feedback. Looking forward for your proposed API. - Shirley -----Original Message----- From: James Bottomley <jejb@xxxxxxxxxxxxx> Sent: Wednesday, December 4, 2019 11:33 AM To: Zhao, Shirley <shirley.zhao@xxxxxxxxx>; Mimi Zohar <zohar@xxxxxxxxxxxxx>; Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>; Jonathan Corbet <corbet@xxxxxxx> Cc: linux-integrity@xxxxxxxxxxxxxxx; keyrings@xxxxxxxxxxxxxxx; linux-doc@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; 'Mauro Carvalho Chehab' <mchehab+samsung@xxxxxxxxxx>; Zhu, Bing <bing.zhu@xxxxxxxxx>; Chen, Luhai <luhai.chen@xxxxxxxxx> Subject: Re: One question about trusted key of keyring in Linux kernel. On Wed, 2019-12-04 at 03:01 +0000, Zhao, Shirley wrote: > Hi, James, > > Using policy digest to reload trusted key, doesn't work, either. > Please check the steps below. > I think policy digest should be calculated by TPM when verifying the > policy to reload key. You misunderstand my meaning: the API we have now doesn't work; the key blob the kernel returns currently after key create won't reload because it contains extraneous data. I was proposing a working API I thought might replace it, but obviously it has to be coded up and accepted into a kernel version before you can use it. If you want to get trusted keys working today, I think the TPM 1.2 API still works if you have a TPM 1.2 system. James
