From 14ff892817feee95345c985ea18dde723395f2e8 Mon Sep 17 00:00:00 2001
From: Tony Arcieri <bascule@gmail.com>
Date: Fri, 30 Jan 2026 19:46:37 -0700
Subject: [PATCH] elliptic-curve: add `From<SecretKey<C> for PublicKey<C>`
 impls

Surprised these didn't exist already
---
 elliptic-curve/src/public_key.rs | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/elliptic-curve/src/public_key.rs b/elliptic-curve/src/public_key.rs
index 2e3906a7e..251089eb8 100644
--- a/elliptic-curve/src/public_key.rs
+++ b/elliptic-curve/src/public_key.rs
@@ -2,7 +2,7 @@
 
 use crate::{
     AffinePoint, CurveArithmetic, CurveGroup, Error, NonZeroScalar, ProjectivePoint, Result,
-    point::NonIdentity,
+    SecretKey, point::NonIdentity,
 };
 use core::fmt::Debug;
 use group::Group;
@@ -293,6 +293,24 @@ where
     }
 }
 
+impl<C> From<SecretKey<C>> for PublicKey<C>
+where
+    C: CurveArithmetic,
+{
+    fn from(secret_key: SecretKey<C>) -> Self {
+        secret_key.public_key()
+    }
+}
+
+impl<C> From<&SecretKey<C>> for PublicKey<C>
+where
+    C: CurveArithmetic,
+{
+    fn from(secret_key: &SecretKey<C>) -> PublicKey<C> {
+        secret_key.public_key()
+    }
+}
+
 #[cfg(feature = "sec1")]
 impl<C> PartialOrd for PublicKey<C>
 where