Add dummy zeroize for jh

RustCrypto · Jan 11, 2024 · 069c74c · 069c74c
1 parent f2e728e
commit 069c74c
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diff --git a/jh/Cargo.toml b/jh/Cargo.toml
@@ -19,3 +19,10 @@ simd = { package = "ppv-lite86", version = "0.2.6" }
 
 [dev-dependencies]
 digest = { version = "=0.11.0-pre.6", features = ["dev"] }
+
+[features]
+zeroize = ["digest/zeroize"]
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
diff --git a/jh/src/lib.rs b/jh/src/lib.rs
@@ -28,6 +28,9 @@ use digest::{
     HashMarker, InvalidOutputSize, Output,
 };
 
+#[cfg(feature = "zeroize")]
+use digest::zeroize::{Zeroize, ZeroizeOnDrop};
+
 /// Core JH hasher state
 #[derive(Clone)]
 pub struct JhCore {
@@ -114,3 +117,17 @@ impl fmt::Debug for JhCore {
         f.write_str("JhCore { ... }")
     }
 }
+
+impl Drop for JhCore {
+    fn drop(&mut self) {
+        #[cfg(feature = "zeroize")]
+        {
+            // TODO: implement Zeroize for Compressor
+            // self.state.zeroize();
+            self.block_len.zeroize();
+        }
+    }
+}
+
+#[cfg(feature = "zeroize")]
+impl ZeroizeOnDrop for JhCore {}