[PATCH v2] tpm: add longer timeouts for creation commands.
From: Winkler, Tomas <hidden>
Date: 2018-02-06 20:52:10
Also in:
linux-integrity, lkml
From: Winkler, Tomas <hidden>
Date: 2018-02-06 20:52:10
Also in:
linux-integrity, lkml
On Sun, Jan 28, 2018 at 10:17:39AM +0200, Tomas Winkler wrote:quoted
TPM2_CC_Create(0x153) and TPM2_CC_CreatePrimary (0x131) involve generation of crypto keys which can be a computationally intensive task. The timeout is set to 3min. Signed-off-by: Tomas Winkler <redacted>This is still NAK because we need some kind of reference for the new value. Is that also right value for ARM64/TrustZone based TPMs?
The SPEC itself, doesn't define the timeout, except for specific commands, also the current 'undefined' number is born in air, I wonder if you can provide the reference as well. If I would suggest to shorten the number that would maybe a problem for other implementation, but I don't see how the increase in timeout is adverse another implementations. Key generation is computational intensive task because of generation of a prime number, so this is really dependent on device capabilities, so there is no better source of definition that HW itself. Thanks Tomas -- To unsubscribe from this list: send the line "unsubscribe linux-security-module" in the body of a message to majordomo at vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html