Add a simple test that makes sure both implementations match.

src/aes/mod.rs

@@ -1,4 +1,32 @@
 #[cfg(all(any(target_arch="x86", target_arch="x86_64"),
           target_feature = "aes"))]
 pub mod aesni;
-pub mod portable;
+pub mod portable;
+
+
+#[cfg(all(any(target_arch="x86", target_arch="x86_64"),
+          target_feature = "aes",
+          test))]
+mod flexible {
+    use super::aesni;
+    use super::portable;
+    use super::portable::aes256::{RandomBlock,RandomKey};
+
+    quickcheck! {
+        fn aes128_implementations_match(key: RandomBlock, block: RandomBlock) -> bool {
+            let aesni_key = aesni::AES128::new(&key.block);
+            let portable_key = portable::AES128::new(&key.block);
+            let aesni_cipher = aesni_key.encrypt(&block.block);
+            let portable_cipher = portable_key.encrypt(&block.block);
+            aesni_cipher == portable_cipher
+        }
+
+        fn aes256_implementations_match(key: RandomKey, block: RandomBlock) -> bool {
+            let aesni_key = aesni::AES256::new(&key.key);
+            let portable_key = portable::AES256::new(&key.key);
+            let aesni_cipher = aesni_key.encrypt(&block.block);
+            let portable_cipher = portable_key.encrypt(&block.block);
+            aesni_cipher == portable_cipher
+        }
+    }
+}