feat(crypto):增加螺旋自解密加密算法支持函数。

tests/spiral_cryption.rs

@@ -0,0 +1,26 @@
+#[cfg(test)]
+mod spriral_test {
+    #[test]
+    fn encrypt_and_decrypt() {
+        let origin_text = "Hello, world!".to_string();
+        let encrypted_text = rs_toolbox::encryption::spiral::encrypt(origin_text.clone());
+        println!("encrypted_text: {}", encrypted_text);
+        let decrypted_text =
+            rs_toolbox::encryption::spiral::decrypt(encrypted_text).expect("decrypt failed");
+        assert_eq!(origin_text, decrypted_text);
+    }
+
+    #[test]
+    fn decrypt_foreign() {
+        let encrypted = "[13WOHv6CLGoIcqX5se6WvHM3pGNBH7wVJONahG7k0Q==".to_string();
+        let decrypted_text = match rs_toolbox::encryption::spiral::decrypt(encrypted) {
+            Ok(text) => text,
+            Err(e) => {
+                println!("error: {}", e);
+                panic!("decrypt failed");
+            }
+        };
+        println!("decrypted_text: {}", decrypted_text);
+        assert_eq!("cxfh@83864830", decrypted_text);
+    }
+}