Fix the "zeroise" spelling error, and use the feature directly

Skip creating an extra feature "zero" and instead just use the one
called "zeroize" by having the dependency optional

Cargo.toml

@@ -60,8 +60,6 @@ avx2 = []
 # For compiling to wasm targets 
 wasm = ["wasm-bindgen", "getrandom", "rand"]
 
-zero = ["zeroize"]
-
 # For benchmarking
 benchmarking = ["criterion"]
 

readme.md

@@ -148,7 +148,7 @@ pqc_kyber = {version = "0.2.0", features = ["kyber512", "90s", "avx2"]}
 | 90s       | Uses SHA2 and AES in counter mode as a replacement for SHAKE. This can provide hardware speedups in some cases. |
 | avx2      | On x86_64 platforms enable the optimized version. This flag is will cause a compile error on other architectures. |
 | wasm      | For compiling to WASM targets.                                                                                                                                     |
-| zero      | This will zero out the key exchange structs on drop using the [zeroize](https://docs.rs/zeroize/latest/zeroize/) crate |
+| zeroize      | This will zero out the key exchange structs on drop using the [zeroize](https://docs.rs/zeroize/latest/zeroize/) crate |
 | benchmarking |  Enables the criterion benchmarking suite |
 ---
 

src/kex.rs

@@ -1,5 +1,5 @@
 use rand_core::{RngCore, CryptoRng};
-#[cfg(feature = "zeroise")]
+#[cfg(feature = "zeroize")]
 use zeroize::{Zeroize, ZeroizeOnDrop};
 use crate::{
   kem::*,
@@ -58,7 +58,7 @@ type Eska = [u8; KYBER_SECRETKEYBYTES];
 /// assert_eq!(alice.shared_secret, bob.shared_secret);
 /// # Ok(()) }
 
-#[cfg_attr(feature = "zeroise", derive(Zeroize, ZeroizeOnDrop))]
+#[cfg_attr(feature = "zeroize", derive(Zeroize, ZeroizeOnDrop))]
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub struct Uake {
   /// The resulting shared secret from a key exchange
@@ -186,7 +186,7 @@ impl Uake {
 /// # Ok(()) }
 /// ```
 #[derive(Clone, Debug, Eq, PartialEq)]
-#[cfg_attr(feature = "zeroise", derive(Zeroize, ZeroizeOnDrop))]
+#[cfg_attr(feature = "zeroize", derive(Zeroize, ZeroizeOnDrop))]
 pub struct Ake {
   /// The resulting shared secret from a key exchange
   pub shared_secret: SharedSecret,