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jarkko

Jarkko Sakkinen

Unless I overlooked something, which is entirely possible, Linux does not know how to sign even NIST-ECDSA (p256r1). That would make tpm2_key_ecdsa the first module that can do ECDSA signatures at all.

I think after TPM2 RSA/ECDSA work lands to mainline, I'll make software implementation of p256k1 ECDSA verification, and some time later, signing. That way at least TPM2 keys can root a key hierarchy for p256k1 keys to the Linux keyring, despite being just software implementation.

Stefan Berger has done during last 2-3 years a decent ecc_* API so should not be even a huge stretch.

So tpm2_key_ecdsa (if I did not overlook anything, cannot be 100% sure) might even enable ECDSA signing overall for Linux kernel for the first time.

#linux #kernel #keys #keyring
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