fix login issue*

test/crypto_simple_test.exs

@@ -0,0 +1,60 @@
+defmodule Odinsea.CryptoSimpleTest do
+  @moduledoc """
+  Simple test module for MapleStory crypto implementation.
+  These tests don't require the full application to start.
+  """
+
+  use ExUnit.Case
+
+  alias Odinsea.Net.Cipher.{IGCipher, ShandaCipher, AESCipher}
+
+  describe "IGCipher (IV transformation)" do
+    test "inno_hash transforms IV correctly" do
+      iv = <<0x34, 0x9A, 0x0F, 0x0C>>
+      result = IGCipher.inno_hash(iv)
+      
+      # Result should be 4 bytes
+      assert byte_size(result) == 4
+      
+      # Result should be different from input (usually)
+      assert result != iv
+    end
+    
+    test "inno_hash produces deterministic results" do
+      iv = <<0xA8, 0xBC, 0x0D, 0xB3>>
+      result1 = IGCipher.inno_hash(iv)
+      result2 = IGCipher.inno_hash(iv)
+      
+      assert result1 == result2
+    end
+  end
+  
+  describe "ShandaCipher" do
+    test "encrypt and decrypt are inverse operations" do
+      original = <<1, 0, 7, 112, 0, 4, 0>>  # CP_PermissionRequest payload
+      encrypted = ShandaCipher.encrypt(original)
+      decrypted = ShandaCipher.decrypt(encrypted)
+      
+      assert decrypted == original
+    end
+    
+    test "encrypt produces different output" do
+      original = <<1, 0, 7, 112, 0, 4, 0>>
+      encrypted = ShandaCipher.encrypt(original)
+      
+      assert encrypted != original
+    end
+  end
+  
+  describe "AESCipher" do
+    test "crypt is self-inverse (XOR property)" do
+      data = <<1, 0, 7, 112, 0, 4, 0>>
+      iv = <<0xA8, 0xBC, 0x0D, 0xB3>>
+      
+      encrypted = AESCipher.crypt(data, iv)
+      decrypted = AESCipher.crypt(encrypted, iv)
+      
+      assert decrypted == data
+    end
+  end
+end