[tpmdd-devel] in-kernel user of ecdsa

Am Montag, 12. M?rz 2018, 22:55:35 CET schrieb James Bottomley:

Hi James,

quoted

ECDSA is not implemented currently in the kernel crypto API.

an ECDSA signature is produced as a ECDH operation using the DSA
algorithm instead of KDFe, so it's trivial with what we have; signature
verification involves a separate point addition but we have all the
primitives for this in crypto/ecc.c so adding it isn't really
difficult, is it?

No, it is not. There even was a patch posted about a year ago to add ECDSA. 
But it was rejected due to missing in-kernel users. I guess that patch could 
be reactivated.

Ciao
Stephan


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