Implement Drop for Scalar

paritytech · Oct 3, 2019 · c05c4e0 · c05c4e0
1 parent 11ba23a
commit c05c4e0
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Showing 2 changed files with 7 additions and 1 deletion.
diff --git a/Cargo.toml b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "libsecp256k1"
 description = "Pure Rust secp256k1 implementation."
 license = "Apache-2.0"
-version = "0.4.0"
+version = "0.3.1"
 authors = ["Wei Tang <hi@that.world>"]
 repository = "https://github.com/sorpaas/libsecp256k1-rs"
 keywords = [ "crypto", "ECDSA", "secp256k1", "bitcoin", "no_std" ]

diff --git a/src/scalar.rs b/src/scalar.rs
@@ -29,6 +29,12 @@ const SECP256K1_N_H_7: u32 = 0x7FFFFFFF;
 /// A 256-bit scalar value.
 pub struct Scalar(pub [u32; 8]);
 
+impl Drop for Scalar {
+    fn drop(&mut self) {
+        self.clear();
+    }
+}
+
 impl Scalar {
     /// Clear a scalar to prevent the leak of sensitive data.
     pub fn clear(&mut self) {