k256: impl ecdsa::hazmat::RecoverableSignPrimitive #111
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Impls the
RecoverableSignPrimitive
trait introduced in RustCrypto/signatures#111 which returns the necessary information(even-or-odd) about the ECDSA signature's
R
y-coordinate to be able to compute the recovery ID without using brute force trial recovery.This implementation leaks some details the existing
ecdsa
crate APIs are trying to abstract over, but hopefully can feed into the requirements for what those APIs should actually look like.