Re: [TrouSerS-users] TCS_EnumRegisteredKeys & TCS_GetRegisteredKey error

[Kent Y. <shp...@gm...>]

Hi Norman,

  The TCS_* functions aren't meant to be called directly, you should
use only Tspi_* API functions in your code.  The TCS interface is only
there to facilitate the calls from the Tspi down to the TPM.

Kent

On 8/21/06, N N <nor...@gm...> wrote:
> Hi Kent & all,
>
> When calling TCS_EnumRegisteredKeys() and TCS_GetRegisteredKey(), I got the
> "Core Service Connection doesn't exist" error message, while calling
> Tspi_Context_GetRegisteredKeysByUUID() succeeds.  Here is
> the calling sequence:
>
> 1. Tspi_Context_Create()
>
> 2. Tspi_Context_Connect()
>
> 3. TCS_EnumRegisteredKeys()  --> "Error: Core Service Connection doesn't
> exist"
>
> 4. TCS_GetRegisteredKey() --> "Error: Core Service Connection doesn't exist"
>
> 5. Tspi_Context_GetRegisteredKeysByUUID() --> success
>
>
> Using a debugger, I was able to see that inside TCS_EnumRegisteredKeys(), it
> calls get_table_entry() to compare the address of the hContext parameter
> against a gloabl struct ht's field entries->tcsContext.  If there is no
> match, it returns an error saying "Core Service Connection doesn't exist".
>
> Any clues why the error is happening for TCS_EnumRegisteredKeys() and
> TCS_GetRegisteredKey(), and not
> Tspi_Context_GetRegisteredKeysByUUID()?
>
> Thanks,
>
> Norman
>
>
> P.S. here is the code:
>
>  void test3()
> {
>   TSS_RESULT tResult;
>   TSS_HCONTEXT hContext;
>   UINT32 numChildren = 0;
>   TSS_KM_KEYINFO *p_KeyHierarchy, *p_Key;
>
>   // create context
>   tResult = Tspi_Context_Create(&hContext);
>   if (tResult != TSS_SUCCESS) {
>     fprintf(stderr, "Tspi_Context_Create failed. Error: %s\n",
>         Trspi_Error_String(tResult));
>   }
>
>   // connect to TCSD
>   tResult = Tspi_Context_Connect(hContext, NULL);
>   if (tResult != TSS_SUCCESS) {
>     fprintf(stderr, "Tspi_Context_Connect failed. Error: %s\n",
>         Trspi_Error_String(tResult));
>   }
>
>
>   // get the key hiarchy under ancestorUUID
>    tResult = TCS_EnumRegisteredKeys(hContext, SRK_UUID,
> &numChildren,
>                     &p_KeyHierarchy);
>   if (tResult != TSS_SUCCESS) {
>     printf("TCS_EnumRegisteredKeys failed. Error: %s\n",
>        Trspi_Error_String(tResult));
>   }
>
>
>   tResult = TCS_GetRegisteredKey(hContext, SRK_UUID,
>                     &p_Key);
>   if (tResult != TSS_SUCCESS) {
>     printf("TCS_GetRegisteredKeys failed. Error: %s\n",
>        Trspi_Error_String(tResult));
>   }
>
>
>   // get the key hiarchy
>   tResult = Tspi_Context_GetRegisteredKeysByUUID(hContext,
>                            TSS_PS_TYPE_SYSTEM,
>                            NULL, &numChildren,
>                          &p_KeyHierarchy);
>   if (tResult != TSS_SUCCESS) {
>     printf("Tspi_Context_GetRegisteredKeysByUUID failed.
> Error: %s\n",
>          Trspi_Error_String(tResult));
>   }
>
> }
>
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-- 
Kent Yoder
IBM LTC Security Dev.