[tpm2] Re: import key in tss format into tpm2-pytss

Thank you for the hint and quick response. The TPM2B_PUBLIC.unmarshal() solves it. 

Best Regards,
Henry

-----Ursprüngliche Nachricht-----
Von: Erik <who(a)cnackers.org> 
Gesendet: Dienstag, 20. September 2022 15:30
An: Gadacz, Henry <henry.gadacz(a)sit.fraunhofer.de>; tpm2(a)lists.01.org
Betreff: Re: [tpm2] import key in tss format into tpm2-pytss

Hi,

You can use the unmarshal method for TPM2B_PUBLIC, so something like this (untested) might work:
from tpm2_pytss.types import TPM2B_PUBLIC                                                                              
                                                                                                                                                                                                                                       
with open("tpm.pub", "rb") as f:                                                                                       
    data = f.read()                                                                                                    
    pub, _ = TPM2B_PUBLIC.unmarshal(data)                                                                              
                                                                                                                                                                                                                                       
print(pub.publicArea.type) 

/Erik

On Tue, 2022-09-20 at 13:20 +0000, Gadacz, Henry wrote:
> Hello everyone,
>  
> I have exported a public key with the tpm2-tools using tpm2_readpublic 
> in the default tss format (I guess it is a TPM2B_PUBLIC structure).
>  
> How can I load it into an TPM2B_PUBLIC or TPMT_PUBLIC object in 
> tpm2-pytss, so I can load it with the
> ESAPI.load_external() function? I have seen the .from_pem() method, 
> but I don’t want to use pem format, because it does not include the key attributes and other information.
>  
> Best Regards,
> Henry
>  
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