[WIP] Add legacy feature with ECDSA-related traits#67
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ECDSA signing computes the `r` component of a signature by reducing the affine x-coordinate of an ephemeral point mod n. This adds a `ReduceAffineX` trait for performing this reduction, with the goal of facilitating an ECDSA implementation which is generic over (prime order) elliptic curves. Additionally, it adds an `IsAffineYOdd` trait which is useful for computing the "recovery ID" used to recover the public key which created a signature (ala point compression).
Codecov Report
@@ Coverage Diff @@
## master #67 +/- ##
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+ Coverage 81.46% 81.50% +0.03%
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Files 12 12
Lines 1392 1395 +3
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+ Hits 1134 1137 +3
Misses 258 258
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This was referenced Jul 11, 2020
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I prefer RustCrypto/signatures#96 to this |
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This is an alternative to #65 which scopes the "legacy" functionality specifically to what is needed to implement ECDSA.
ECDSA signing computes the
rcomponent of a signature by reducing the affine x-coordinate of an ephemeral point mod n.This adds a
ReduceAffineXtrait for performing this reduction, with the goal of facilitating an ECDSA implementation which is generic over (prime order) elliptic curves.Additionally, it adds an
IsAffineYOddtrait which is useful for computing the "recovery ID" used to recover the public key which created a signature (ala point compression).