ecdsa signing algorithm ?

[adrian798]

is there any scope to add ecdsa signing algorithm ?

[tarcieri]

We definitely plan on adding ECDSA relatively soon. See the existing ECDSA crate:

https://github.com/RustCrypto/signatures/tree/master/ecdsa

The main issues to tackle are support for curve arithmetic which is generic over the underlying (Weierstrass) curve (#22) as well as access to the underlying (x-)coordinate(s) for AffinePoints in a safe, misuse-resistant way.

[tarcieri]

FYI, just landed a secp256k1 ECDSA implementation in #79.

There's also an open PR for P-256 which I'd like to take a swing at fixing up: #57

[tarcieri]

As of #101 and #104, ECDSA (with random k only at present) is fully implemented.

#105 added initial documentation to the k256 crate.

Going to go ahead and close this issue. There's still more work to do (e.g. RFC 6979), but that will happen mostly upstream in the ecdsa crate.