[Trustedjava-support] Beginner's Questions and Answers

[Ronald T. <ron...@ia...>]

Hello trustedJava users,

Here some Q&A from a user on the newest releases and my answers. In the 
future this might develop into a FAQ..

 >I always get the following exception when using jTpmTools. Would you 
tell me how to resolve it if you know that. Thanks very much.
 >..
 > [root@localhost jTpmTools_0.3b]# ./jtt.sh create_key -k 123456
 > Exception in thread "main" java.lang.NoClassDefFoundError: 
iaik/tc/tss/api/tspi/TcTssContextFactory
 >..
The new TPM tools 0.3b require the newest jTSS 0.3, where 
TcTssContextFactory is introduced.
Make sure that the most recent iaik_jtss_tsp.jar is in the 
<jtpmtools>/ext_libs directory.


 > Do you mean that jTSS 0.3 also only supports TrouSerS up  to 0.2.9.1 
? Thanks.
_jTSS_ is an _alternative_ to TrouSerS. It therefore cannot support 
TrouSerS at all, and they must not run at the same time!

However, _jTSS Wrapper_ also requires the Java API definitions provided 
in the iaik_jtss_tsp.jar file of jTSS. It then implements the 
functionality using TrouSerS. It only supports TrouSerS up  to 0.2.9.1. 
You might also have to add our TPM1.2 patch to TrouSerS.


 > [root@localhost jTpmTools_0.3b]# ./jtt.sh  take_owner -o 123 -s 123
 >20:48:49:220 [INFO] TakeOwnership::execute (82):        TakeOwnership 
succeeded
Here you set a non-default SRK secret.

 >[root@localhost jTpmTools_0.3b]# ./jtt.sh  create_key -k 123456
 > ..
 > TSS Error:
 > error layer:                0x00 (TPM)
 > error code (without layer): 0x01
 > error code (full):          0x01
 > error message: Authentication failed
And here, you do not specify it. Use the -s parameter.
Note that the jTPMTools will use the SRK as the default parent key for 
the generated keys.

 > TSS Error:
 > error layer:                0x00 (TPM)
 > error code (without layer): 0x01
 > error code (full):          0x01
 > error message: Authentication failed
More generally: This error message indicates that some 
credential/password is wrong. Double check spelling of the owner, SRK or 
application password or all of them. Also consider the encodings and 
whether the trailing zero is included or not. Repeat.


Regards,
Ronald

-- 
Dipl.-Ing. Ronald Tögl          phone +43 316/873-5502
Trusted Computing Labs          fax   +43 316/873-5520
IAIK                            ron...@ia...
Graz University of Technology   http://www.iaik.tugraz.at