fix login issue*

test/test_shanda.exs

@@ -0,0 +1,54 @@
+# Test Shanda cipher - encrypt then decrypt should give original
+
+Code.require_file("lib/odinsea/util/bit_tools.ex", ".")
+Code.require_file("lib/odinsea/net/cipher/shanda_cipher.ex", ".")
+
+alias Odinsea.Net.Cipher.ShandaCipher
+alias Odinsea.Util.BitTools
+
+import Bitwise
+
+# Test with simple data
+data = <<0x01, 0x00, 0x07, 0x70, 0x00, 0x04, 0x00>>
+IO.puts("Original data: #{Base.encode16(data)}")
+
+# Encrypt
+encrypted = ShandaCipher.encrypt(data)
+IO.puts("Encrypted: #{Base.encode16(encrypted)}")
+
+# Decrypt
+decrypted = ShandaCipher.decrypt(encrypted)
+IO.puts("Decrypted: #{Base.encode16(decrypted)}")
+
+IO.puts("Match: #{data == decrypted}")
+IO.puts("")
+
+# If they don't match, let's debug step by step
+if data != decrypted do
+  IO.puts("MISMATCH! Let's debug...")
+  IO.puts("")
+  
+  # Manual encrypt - first pass only
+  bytes = :binary.bin_to_list(data)
+  data_len = length(bytes)
+  data_length = data_len &&& 0xFF
+  
+  IO.puts("Data length: #{data_len}")
+  IO.puts("Initial bytes: #{inspect(bytes)}")
+  IO.puts("")
+  
+  # First pass (j=0, forward)
+  IO.puts("=== Pass 0 (forward) ===")
+  {result0, remember0} = Enum.reduce(Enum.with_index(bytes), {[], 0}, fn {cur, i}, {acc, remember} ->
+    cur = BitTools.roll_left(cur, 3)
+    cur = (cur + data_length) &&& 0xFF
+    cur = bxor(cur, remember)
+    new_remember = cur
+    cur = BitTools.roll_right(cur, data_length &&& 0xFF)
+    cur = bxor(cur, 0xFF)
+    cur = (cur + 0x48) &&& 0xFF
+    {[cur | acc], new_remember}
+  end)
+  result0 = Enum.reverse(result0)
+  IO.puts("After pass 0: #{inspect(result0)}, remember: #{remember0}")
+end