Hello,
I recently started working with TPM and there are some issues that still
appear.
I use Dell Latitude E6430, Ubuntu 12.10 32-bit, linux kernel
3.5.0-23-generic.
1)
tpm auto test failed during boot, and therefore I disabled tpm_tis at boot
time.
The only workaround that seems to work is the following:
$ sudo modprobe tpm_tis force=1 interrupts=0
FATAL: Error inserting tpm_tis
(/lib/modules/3.5.0-23-generic/kernel/drivers/char/tpm/tpm_tis.ko): No such
device
$ sudo modprobe tpm_tis force=1 interrupts=0
$
dmesg shows the following:
[ 87.347719] tpm_tis tpm_tis: 1.2 TPM (device-id 0x3204, rev-id 64)
[ 87.418171] tpm_tis tpm_tis: tpm_transmit: tpm_send: error 4294967234
[ 87.418178] tpm_tis tpm_tis: TPM self test failed
[ 93.579377] tpm_tis tpm_tis: 1.2 TPM (device-id 0x3204, rev-id 64)
2)
Taking ownership in linux doesn't work (Internal Software Error), so I did
it in Windows 7.
And then used workaround described at Trousers' FAQ.
$ tpm_takeownership
Enter owner password:
Confirm password:
Enter SRK password:
Confirm password:
Tspi_TPM_TakeOwnership failed: 0x00002004 - layer=tcs, code=0004 (4),
Internal software error
$
3)
I can register signing key or unregister it, but can't load it. Loading SRK
works though.
Registered key has flag TSS_KEY_NO_AUTHORIZATION
(additionaly it has TSS_KEY_TYPE_SIGNING | TSS_KEY_SIZE_2048 |
TSS_KEY_NOT_MIGRATABLE),
so it should load the key using Tspi_Context_LoadKeyByUUID, as described in
TSS 1.2 Spec.
I get following error:
Loading signing key by UUID... [Tspi_Context_LoadKeyByUUID] ==> 0x1087: I/O
error
If I now run tpm_version, I get following:
$ tpm_version
TPM 1.2 Version Info:
Chip Version: 1.2.37.14
Spec Level: 2
Errata Revision: 2
TPM Vendor ID: ATML
Tspi_TPM_GetCapability failed: 0x00001087 - layer=tddl, code=0087 (135),
I/O error
4)
Some additional info:
$ tpm_version
TPM 1.2 Version Info:
Chip Version: 1.2.37.14
Spec Level: 2
Errata Revision: 2
TPM Vendor ID: ATML
TPM Version: 01010000
Manufacturer Info: 41544d4c
Trousers 0.3.9-2ubuntu1 is installed.
I would appreciate any comments how to properly deal with these issues.
Truly yours,
Ivan Pryvalov.
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