Hi
Thanks for your reply.I have looked at the data structures defined in TPM Spec
Part 2.
Is there any library available to pull out public and private keys from these
data structures?
It would be very helpful if you could point out me a sample code.
Date: Thu, 21 Mar 2013 09:50:50 -0400
From: Ken Goldman <[email protected]>
Subject: Re: [TrouSerS-users] Format of TPM Keys
To: [email protected]
Message-ID: <[email protected]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Coming off the TPM, the format is a TCG specific binary blob, not ASN1,
base64, or any other standard.
You can find the structure in the TPM spec Part 2. The private part is
encrypted by the parent key.The public key can be unmarshalled if you
like. I can point you to sample code.
The intent of the TSS is to insulate you from those details.
On 3/21/2013 2:31 AM, ravi kiran wrote:
> sorry the previous message was broken.
>
> Can someone tell me the format of public and private key blobs exported
> by TPM? I am using trousers 0.3.10 for accessing the TPM.When I use the
> GetPrivateKey or PublicKey option (Tspi_GetAttribData()) the key that is
> returned is a binary blob that is not ASN1 decodable.I have tried with
> both openssl asn1parse and bouncycastle jar.Also, the openssl-tpm-engine
> extracts the public key element by element. Is that the only way to
> handle this?I have just started working with TPMs and am thoroughly
> confused.
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