feat: add crypto2-demo

__crypto/crypto2-demo/src/main.rs

@@ -0,0 +1,24 @@
+use crypto2::blockcipher::Aes128;
+
+fn main() {
+    let key = [
+        0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
+        0x0f,
+    ];
+    let plaintext = [
+        0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee,
+        0xff,
+    ];
+
+    let cipher = Aes128::new(&key);
+
+    let mut ciphertext = plaintext.clone();
+    cipher.encrypt(&mut ciphertext);
+
+    let mut cleartext = ciphertext.clone();
+    cipher.decrypt(&mut cleartext);
+
+    println!("plaintext : {:?}", &plaintext[..]);
+    println!("ciphertext: {:?}", &ciphertext[..]);
+    println!("cleartext : {:?}", &cleartext[..]);
+}