Re: Exporting key without encryption

Hi Peter,

Saw your replay on may inbox but can't see it here.

The AES key is being generated on a context not linked to any device.

I need the plainkey to burn in on a device that has AES encryption support.
I could generate a random buffer the same size the key is but that would
solve the hardware device problem but not using cryptlib.

I think I could use CRYPT_CTXINFO_KEY before generating the key but haven't
tried that.

Jacques


JexMcByte wrote:
> 
> Is it possible to export a key (AES-256) without any encryption ?
> 
> cryptExport asks for a context containing a key to encrypt the exported
> key. I've tryed CRYPT_UNUSED, NULL, empty context but none of those
> worked.
> 
> Is it possible or do we have a workaround to it ?
> 
> I really need the plain key.
> 
> For another task I'll need to export this key encrypted by a public key
> (RSA), but the key I'm getting with
> 
> res = cryptGetPublicKey( cryptDevice, &devicePubKey, CRYPT_KEYID_NAME,
> label );
> 
> I'm not being able to get it inside a context so I can use the context to
> export the AES key I mentioned, I'll also need to include the private RSA
> key later to import this encrypted AES key.
> 
> Maybe this (encrypted exporting/importing) will be solved when I have my
> previous post problem solved.
> 
> Jacques
> 

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