Implementing EC Signature

[sethladd]

Customer request.

[nex3]

@sethladd Can you add more detail about these requests, like links to the relevant specifications?

[sethladd]

@mpcomplete needed this a while ago, but we've since worked around it (I think by using some crypto package from pub?)

Here's a quick result: https://en.wikipedia.org/wiki/Elliptic_Curve_Digital_Signature_Algorithm

@mpcomplete any other specifics that would you have needed, or might still need? Thanks!

[nex3]

Thanks! Similar links for the other requests would also be really helpful.

[mpcomplete]

I'm using 2 third-party libraries for this: asn1lib and cipher. The things I need from each are:

• all of asn1lib (for parsing DER-encoded ASN.1 objects generated by openssl).
• from cipher: ECSignature, ECPublicKey, ECPrivateKey, Signer("SHA-256/ECDSA"), ECDomainParameters("prime256v1"), SecureRandom, and a SHA-256 hashing function.

Github links:

• https://github.com/wstrange/asn1lib
• https://github.com/izaera/cipher