[tpm2] Re: Need Help to parse AK public key

[tpm2] Re: Need Help to parse AK public key

[Chenxi Z]

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thanks. It is even better.

[tpm2] Re: Need Help to parse AK public key

[nicolasoliver03]

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You can also use tpm2_readpublic for an already created one!

tpm2_readpublic -c ak.ctx -f PEM -o ak.pem

tpm2_readpublic -c 0x81010001 -f PEM -o ak.pem

[tpm2] Re: Need Help to parse AK public key

[chenxiz]

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Thanks Steffen, It helps!

thanks,
Chenxi

[tpm2] Re: Need Help to parse AK public key

[Steffen Schwebel]

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Hello,

you can specify a format via the -f switch.

Use -f pem

tpm2_createak -C 0x81010001 -c ak.ctx -u ak.pub -r ak.priv -n ak.name -P
dummypwd -p dummypwd -f pem

regards,
Steffen Schwebel

On 2/19/20 11:32 PM, chenxiz(a)fb.com wrote:
> Hi,
>
> I created a 2048 RSA AK by using the command below :
> tpm2_createak -C 0x81010001 -c ak.ctx -u ak.pub -r ak.priv -n ak.name -P dummypwd -p dummypwd
>
> ak.pub file size = 282 bytes.
> $stat --printf="%s" ak.pub
> 282
>
> I would like to parse the RSA public key, i.e., e and n, Can anyone help me elaborate the ak.pub format or is there any tool I can use to parse it?
>
> TPM2 tools version (all are the latest):
> tpm2-tools-4.1.1
> tpm2-abrmd-2.3.1
> tpm2-tss-2.3.2
>
>
> Thanks,
> Chenxi
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