feat(crypt):完成DES便捷加密函数。

tests/des_cryption.rs

@@ -0,0 +1,25 @@
+#[cfg(test)]
+mod des_test {
+    #[test]
+    fn encrypt_zero_padding() {
+        let cipher_data =
+            rs_toolbox::encryption::des::encrypt_zero_padding("123456", "Hello world.");
+        let cipher_hex = rs_toolbox::serialize::to_hex(cipher_data);
+        assert_eq!(cipher_hex, "34115b8448d11e6d284576573a28629b");
+    }
+
+    #[test]
+    fn decrypt_zero_padding() {
+        let plain_data = rs_toolbox::encryption::des::decrypt_zero_padding(
+            "123456",
+            rs_toolbox::serialize::from_hex("34115b8448d11e6d284576573a28629b").unwrap(),
+        );
+        if plain_data.is_err() {
+            panic!("Decrypt failed");
+        }
+        assert_eq!(
+            String::from_utf8(plain_data.unwrap()).unwrap(),
+            "Hello world."
+        );
+    }
+}