[tpm2] Re: ESys_ActivateCredential

[Roberts, William C <william.c.roberts at intel.com>]

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The error codes encode a bunch of values, so you won't see that value via a straight grep.

But you can use tpm2_rc_decode from the tpm2-tools project, like so:
$ tpm2_rc_decode 0x2c4
tpm:parameter(2):value is out of range or is not correct for the contex

See the tools project:
https://github.com/tpm2-software/tpm2-tools

Note that the commands specification will show you what parameter 2 is:
https://trustedcomputinggroup.org/wp-content/uploads/TPM-Rev-2.0-Part-3-Commands-01.38.pdf

Everything after the triple line starts the parameters starting at index 1.
So in this case the secret parameter is wrong.

Note that since TSS version 2.3.0 a software library was also added
for converting these return codes to more human understandable strings,
The header file is here:
https://github.com/tpm2-software/tpm2-tss/blob/master/include/tss2/tss2_rc.h

and then you just link against lib tss2-rc, just in case you needed this built into
your program.

Bill

> -----Original Message-----
> From: Rahul Hardikar [mailto:rahulhardikar(a)gmail.com]
> Sent: Tuesday, March 10, 2020 5:02 PM
> To: tpm2(a)lists.01.org
> Subject: [tpm2] ESys_ActivateCredential
> 
> 
> Hi All,
> What does it mean when Esys_ActivateCredential returns 0x2c4? I don't see this
> error defined anywhere.
> 
> Thanks,
> Rahul