Re: [Trustedjava-support] Key Uuid

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

Hello Till,



Till Bentz wrote:


> Hello,
>
> I create a new key with the following code based on the examples:
>
> -- 
>         TcIRsaKey signingKey = 
> context.createRsaKeyObject(TcTssConstants.TSS_KEY_SIZE_2048 | 
> TcTssConstants.TSS_KEY_TYPE_SIGNING
>                 | TcTssConstants.TSS_KEY_MIGRATABLE);
>         keyUsagePolicy.assignToObject(signingKey);
>         keyMigrationPolicy.assignToObject(signingKey);
>         signingKey.createKey(srk, null);
>         signingKey.loadKey(srk);
> -- 
>
> This seems to work. But how can I make this key to appear in the list 
> of loaded keys of my TPM. Also this key always has the Uuid 
> 00000000-0000-0000-0000-000000000000. Is that correct? It seems 
> somehow strange...
> -- 
> MfG
>   Till

At the creation of a TcIRsaKey object, no UUID is generated.
In general, UUIDs are only needed when using persistent storage. For 
instance (see the code below for an example), when you register a key in 
the PS, you need to provide an UUID.

TcTssUuid keyUUID = TcUuidFactory.getInstance().generateRandomUuid();

context.registerKey(key, TcTssConstants.TSS_PS_TYPE_SYSTEM, keyUuid,
                      TcTssConstants.TSS_PS_TYPE_SYSTEM,

See also the example code from jTpmTools, in iaik/tc/apps/jtt/keys/*,java.

Regards, Ronald

-- 
Ronald Toegl
IAIK, TU Graz