ctr: implement Clone directly instead of deriving it

ctr/CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 0.9.2 (2022-09-30)
+### Changed
+- Implement `Clone` directly for `CtrCore`, so it would work with non-`Clone` flavors ([#24])
+
+[#24]: https://github.com/RustCrypto/block-modes/pull/24
+
 ## 0.9.1 (2022-02-17)
 ### Fixed
 - Minimal versions build ([#9])

ctr/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ctr"
-version = "0.9.1"
+version = "0.9.2"
 description = "CTR block modes of operation"
 authors = ["RustCrypto Developers"]
 license = "MIT OR Apache-2.0"

ctr/src/ctr_core.rs

@@ -10,7 +10,6 @@ use core::fmt;
 use cipher::zeroize::ZeroizeOnDrop;
 
 /// Generic CTR block mode instance.
-#[derive(Clone)]
 pub struct CtrCore<C, F>
 where
     C: BlockEncryptMut + BlockCipher,
@@ -118,6 +117,20 @@ where
     }
 }
 
+impl<C, F> Clone for CtrCore<C, F>
+where
+    C: BlockEncryptMut + BlockCipher + Clone,
+    F: CtrFlavor<C::BlockSize>,
+{
+    #[inline]
+    fn clone(&self) -> Self {
+        Self {
+            cipher: self.cipher.clone(),
+            ctr_nonce: self.ctr_nonce.clone(),
+        }
+    }
+}
+
 impl<C, F> fmt::Debug for CtrCore<C, F>
 where
     C: BlockEncryptMut + BlockCipher + AlgorithmName,