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ecdsa: impl From<&VerifyKey<C>> for EncodedPoint<C> #144

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Merged
tarcieri merged 1 commit into from
Sep 2, 2020
Merged

ecdsa: impl From<&VerifyKey<C>> for EncodedPoint<C> #144

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17 changes: 16 additions & 1 deletion ecdsa/src/verify.rs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
//! ECDSA verify key. Generic over elliptic curves.
//! ECDSA verification key (i.e. public key). Generic over elliptic curves.
//!
//! Requires an [`elliptic_curve::Arithmetic`] impl on the curve, and a
//! [`VerifyPrimitive`] impl on its associated `AffinePoint` type.
Expand All @@ -11,6 +11,7 @@ use core::ops::Add;
use elliptic_curve::{
consts::U1,
generic_array::ArrayLength,
point,
sec1::{
EncodedPoint, FromEncodedPoint, ToEncodedPoint, UncompressedPointSize, UntaggedPointSize,
},
Expand Down Expand Up @@ -89,3 +90,17 @@ where
self.verify_digest(C::Digest::new().chain(msg), signature)
}
}

impl<C> From<&VerifyKey<C>> for EncodedPoint<C>
where
C: Curve + Arithmetic + point::Compression,
C::AffinePoint: VerifyPrimitive<C> + FromEncodedPoint<C> + ToEncodedPoint<C>,
C::Scalar: FromDigest<C>,
UntaggedPointSize<C>: Add<U1> + ArrayLength<u8>,
UncompressedPointSize<C>: ArrayLength<u8>,
SignatureSize<C>: ArrayLength<u8>,
{
fn from(verify_key: &VerifyKey<C>) -> EncodedPoint<C> {
verify_key.to_encoded_point(C::COMPRESS_POINTS)
}
}