1:29 a.m.
Hi Roberts,
Thanks a lot for your response. As per your suggestion , I remember that I
set "authHandle" as ESYS_TR type. And the test code that I have shared also
has the same implementation.
Below is how I set the "authHandle" , which is of ESYS_TR type and passed
as argument to below Esys_NV_Read () API.
ESYS_TR authHandle = 0x40000001;
rc = Esys_NV_Read(
ectx,
authHandle,
nv_index2, /* the nv index to read from */
ESYS_TR_PASSWORD,
ESYS_TR_NONE,
ESYS_TR_NONE,
20,
0,
&read_data);
if (rc != TSS2_RC_SUCCESS) {
printf("Esys_NV_Read <ERROR>: 0x%x\n", rc);
goto out;
}
Let me know , anything else am I missing?
BR,
Muthukumar
6:59 a.m.
-----Original Message-----
From: Muthukumar S [mailto:muthu.smk@gmail.com]
Sent: Wednesday, May 20, 2020 4:29 AM
To: tpm2(a)lists.01.org; Roberts, William C <william.c.roberts(a)intel.com>
Subject: authHandle issues
Hi Roberts,
Thanks a lot for your response. As per your suggestion , I remember that I set
"authHandle" as ESYS_TR type. And the test code that I have shared also has
the
same implementation.
Below is how I set the "authHandle" , which is of ESYS_TR type and passed as
argument to below Esys_NV_Read () API.
ESYS_TR authHandle = 0x40000001;
Just because the C type is an ESYS_TR doesn't mean the value you're assigning is
Correct. You're assigning the raw tpm handle to that ESYS_TR. ESYS doesn't
understand
That. You need to assign either:
1. The value of nv_index2 (saying authorize me by using the authvalue for the nv index)
2. ESYS_TR_RH_OWNER (saying authorize me by using the authvalue of the owner)
You can find the definition for ESYS_TR_RH_OWNER here:
https://github.com/tpm2-software/tpm2-tss/blob/master/include/tss2/tss2_e...
In retrospect, we should have made ESYS_TR an enum to make this more explicit.
rc = Esys_NV_Read(
ectx,
authHandle,
nv_index2, /* the nv index to read from */
ESYS_TR_PASSWORD,
ESYS_TR_NONE,
ESYS_TR_NONE,
20,
0,
&read_data);
if (rc != TSS2_RC_SUCCESS) {
printf("Esys_NV_Read <ERROR>: 0x%x\n", rc);
goto out;
}
Let me know , anything else am I missing?
BR,
Muthukumar
8:04 a.m.
Hi Roberts,
Thank you for the clarification.
BR,
Muthukumar
On Wed, May 20, 2020, 8:29 PM Roberts, William C <
william.c.roberts(a)intel.com wrote:
> -----Original Message-----
> From: Muthukumar S [mailto:muthu.smk@gmail.com]
> Sent: Wednesday, May 20, 2020 4:29 AM
> To: tpm2(a)lists.01.org; Roberts, William C <william.c.roberts(a)intel.com>
> Subject: authHandle issues
>
> Hi Roberts,
>
> Thanks a lot for your response. As per your suggestion , I remember that
I set
> "authHandle" as ESYS_TR type. And the test code that I have shared also
has the
> same implementation.
>
> Below is how I set the "authHandle" , which is of ESYS_TR type and
passed as
> argument to below Esys_NV_Read () API.
>
> ESYS_TR authHandle = 0x40000001;
Just because the C type is an ESYS_TR doesn't mean the value you're
assigning is
Correct. You're assigning the raw tpm handle to that ESYS_TR. ESYS doesn't
understand
That. You need to assign either:
1. The value of nv_index2 (saying authorize me by using the authvalue for
the nv index)
2. ESYS_TR_RH_OWNER (saying authorize me by using the authvalue of the
owner)
You can find the definition for ESYS_TR_RH_OWNER here:
https://github.com/tpm2-software/tpm2-tss/blob/master/include/tss2/tss2_e...
In retrospect, we should have made ESYS_TR an enum to make this more
explicit.
> rc = Esys_NV_Read(
> ectx,
> authHandle,
> nv_index2, /* the nv index to read from */
> ESYS_TR_PASSWORD,
> ESYS_TR_NONE,
> ESYS_TR_NONE,
> 20,
> 0,
> &read_data);
> if (rc != TSS2_RC_SUCCESS) {
> printf("Esys_NV_Read <ERROR>: 0x%x\n", rc);
> goto out;
> }
> Let me know , anything else am I missing?
>
> BR,
> Muthukumar
12:44 a.m.
Hi Roberts,
After adding RH_OWNER macro directly, I could able to read the offset which
has data written via tpm2_nvread() tool application.
Once again thanks a lot for sharing the inputs. Now j will be trying to
write using my app in to different offset with random number generated
using TPM and will read it back from my application.
BR,
Muthukumar
On Wed, May 20, 2020, 9:34 PM Muthukumar S <muthu.smk(a)gmail.com wrote:
Hi Roberts,
Thank you for the clarification.
BR,
Muthukumar
On Wed, May 20, 2020, 8:29 PM Roberts, William C <
william.c.roberts(a)intel.com wrote:
>
>
> > -----Original Message-----
> > From: Muthukumar S [mailto:muthu.smk@gmail.com]
> > Sent: Wednesday, May 20, 2020 4:29 AM
> > To: tpm2(a)lists.01.org; Roberts, William C <william.c.roberts(a)intel.com>
> > Subject: authHandle issues
> >
> > Hi Roberts,
> >
> > Thanks a lot for your response. As per your suggestion , I remember
> that I set
> > "authHandle" as ESYS_TR type. And the test code that I have shared
also
> has the
> > same implementation.
> >
> > Below is how I set the "authHandle" , which is of ESYS_TR type and
> passed as
> > argument to below Esys_NV_Read () API.
> >
> > ESYS_TR authHandle = 0x40000001;
>
> Just because the C type is an ESYS_TR doesn't mean the value you're
> assigning is
> Correct. You're assigning the raw tpm handle to that ESYS_TR. ESYS
> doesn't understand
> That. You need to assign either:
> 1. The value of nv_index2 (saying authorize me by using the authvalue for
> the nv index)
> 2. ESYS_TR_RH_OWNER (saying authorize me by using the authvalue of the
> owner)
>
> You can find the definition for ESYS_TR_RH_OWNER here:
>
> https://github.com/tpm2-software/tpm2-tss/blob/master/include/tss2/tss2_e...
>
> In retrospect, we should have made ESYS_TR an enum to make this more
> explicit.
>
> > rc = Esys_NV_Read(
> > ectx,
> > authHandle,
> > nv_index2, /* the nv index to read from */
> > ESYS_TR_PASSWORD,
> > ESYS_TR_NONE,
> > ESYS_TR_NONE,
> > 20,
> > 0,
> > &read_data);
> > if (rc != TSS2_RC_SUCCESS) {
> > printf("Esys_NV_Read <ERROR>: 0x%x\n",
rc);
> > goto out;
> > }
> > Let me know , anything else am I missing?
> >
> > BR,
> > Muthukumar
>
809
days inactive
810
days old
3 comments
2 participants
participants (2)
-
Muthukumar S -
Roberts, William C