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List:       trousers-users
Subject:    Re: [TrouSerS-users] No Endorsment Key?
From:       Rajiv Andrade <srajiv () linux ! vnet ! ibm ! com>
Date:       2012-01-31 18:12:28
Message-ID: 20120131181228.GA12880 () hardened-box ! ibm ! com
[Download RAW message or body]

On Sun, 29 Jan 2012, octane indice wrote:

> > Hello
> > 
> Some more infos. I use a SMP linux kernel, should I try with no SMP?
> 
> The laptop is a Latitude D430, I did a BIOS update to the latest,
> but still doesn't work. 
> 
> What can I do now?
> 
> Thanks.
> 
> > I just d/l the latest releases of trousers + tpm-tools. My
> > kernel is 2.6.37.6.
> > 
> > What works is:
> > 
> > I modprobe the tpm_tis module:
> > tpm_tis 00:0c: 1.2 TPM (device-id 0x1001, rev-id 2)
> > 
> > # ps ax | grep tcsd
> > 15844 pts/0    S      0:00 tcsd -f
> > 
> > # tpm_version
> > 
> >   TPM 1.2 Version Info:
> >   Chip Version:        1.2.2.10
> >   Spec Level:          0
> >   Errata Revision:     0
> >   TPM Vendor ID:       BRCM
> >   TPM Version:         01010000
> >   Manufacturer Info:   4252434d
> > 
> > And what doesn't work:
> > 
> > # tpm_takeownership -y -z
> > Tspi_TPM_TakeOwnership failed: 0x00000023 - layer=tpm,
> > code=0023 (35), No EK
> > 
> > So I manage to create an Endorsment Key:
> > 
> > # tpm_createek             (hangs for 4-5 second, then:)
> > TCSD TDDL ERROR: read from device /dev/tpm0 failed: Timer
> > expired
> > Tspi_TPM_CreateEndorsementKey failed: 0x00001087 - layer=tddl,
> > code=0087 (135),
> > I/O error
> >

Can you try with kernel 2.6.38? The TPM timeouts were been mishandled
prior to this version. I definitely recommend going to 3.2 though, which
has the TPM timeouts handled consistently.

Thanks,
-- 
Rajiv Andrade
Security Development
IBM Linux Technology Center


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