Re: [Trustedjava-support] "Unable to open TPM device" error while using TrouSerS TSS 0.2.9.1 & jTSSWrapper 0.3

[Martin P. <Mar...@ia...>]

Nektarios Ioannides wrote:
> 15:50:28:601 [INFO] CommonSettings::getTssFactory (37): TrouSerS TSS found.
> Using JNI bindings...
> 15:50:28:684 [WARN] TcTddlLinux::open (-1): Unable to open TPM device file /dev/tpm.
> Reason: /dev/tpm (Device or resource busy)

Only one process can use /dev/tpm at a time.

a) standalone/native JTSS directly accesses /dev/tpm
or
b) tcsd is sitting on /dev/tpm, JTssWrapper talks to tcsd on port 30003.


To see who is currently using /dev/tpm use the lsof command, e.g.:
$ sudo lsof /dev/tpm
COMMAND   PID USER   FD   TYPE DEVICE SIZE  NODE NAME
tcsd    26753 root    3u   CHR 10,224      29876 /dev/tpm



JTpmTools autodetects in which mode to run.

If you want to test your access/permission/setup try a simple command, e.g.:


with tcsd running:

/jTpmTools_0.3$ ./jttcut.sh pcr_read
09:26:44:499 [INFO] CommonSettings::getTssFactory (37): TrouSerS TSS found. Using JNI bindings...
number of PCRs: 24
00:  ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
01:  ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[...]


without tcsd running:

/jTpmTools_0.3$ ./jttcut.sh pcr_read
09:27:35:197 [INFO] CommonSettings::getTssFactory (39): TrouSerS and/or jTSS Wrapper not found. Trying IAIK jTSS.
09:27:35:318 [INFO] TcTcsi::<clinit> (-1):      Unable to open TCS configuration file for system persistent storage information. Disabling system persistent
storage.
09:27:35:345 [INFO] CommonSettings::getTssFactory (47): IAIK jTSS found. Using local bindings...
number of PCRs: 24
00:  ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
01:  ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[...]



a full set of libraries:

/jTpmTools_0.3$ find ext_libs/ |sort
ext_libs/iaik_jce.jar
ext_libs/iaik_jtss_tcs.jar
ext_libs/iaik_jtss_tsp.jar
ext_libs/iaik_jtss_wrapper.jar
ext_libs/iaik_jtss_wrapper_swig.jar
ext_libs/iaik_tccert.jar
ext_libs/iaik_xkms.jar
ext_libs/iaik_xsect.jar
ext_libs/jaxb/activation.jar
ext_libs/jaxb/jaxb-api.jar
ext_libs/jaxb/jaxb-impl.jar
ext_libs/jaxb/jsr173_1.0_api.jar
ext_libs/libtspiwrapper.so




Sorry, I cannot reproduce your problem.


HTH


-- 
Martin Pirker
IAIK, TU Graz