fix login issue*

test/test_ivs.exs

@@ -0,0 +1,55 @@
+# Test specific IV candidates
+
+Code.require_file("lib/odinsea/util/bit_tools.ex", ".")
+Code.require_file("lib/odinsea/net/cipher/ig_cipher.ex", ".")
+Code.require_file("lib/odinsea/net/cipher/aes_cipher.ex", ".")
+Code.require_file("lib/odinsea/net/cipher/shanda_cipher.ex", ".")
+
+alias Odinsea.Net.Cipher.{IGCipher, AESCipher, ShandaCipher}
+
+import Bitwise
+
+packet = <<0x7C, 0xA8, 0x7B, 0xA8, 0xBF, 0x0A, 0xCD, 0xDE, 0xC7, 0x71, 0xAC>>
+<<raw_seq::little-16, raw_len::little-16, payload::binary>> = packet
+
+IO.puts("Testing IV candidates for packet: #{Base.encode16(packet)}")
+IO.puts("raw_seq: 0x#{Integer.to_string(raw_seq, 16)}, raw_len: 0x#{Integer.to_string(raw_len, 16)}")
+IO.puts("")
+
+# IV candidates based on bytes [2]=0x0F, [3]=0x0C, [4]=0xA8, [5]=0xBC
+candidates = [
+  <<0x0F, 0x0C, 0x0C, 0xA8>>,  # [2][3][3][4] - overlapping
+  <<0x0C, 0x0C, 0x0C, 0xA8>>,  # [3][3][3][4]
+  <<0x0C, 0xA8, 0x0C, 0xA8>>,  # [3][4][3][4] - repeating pattern
+  <<0x0F, 0x0C, 0xA8, 0xBC>>,  # [2][3][4][5] - recv_iv from hello?
+  <<0x34, 0x9A, 0x0C, 0xA8>>,  # [0][1][3][4]
+  <<0x9A, 0x0F, 0x0C, 0xA8>>,  # [1][2][3][4]
+  <<0x0C, 0xA8, 0xBC, 0x0D>>,  # [3][4][5][6]
+  <<0xA8, 0xBC, 0x0C, 0xA8>>,  # [4][5][3][4]
+]
+
+Enum.each(candidates, fn iv ->
+  <<_r0, _r1, r2, r3>> = iv
+  seq_base = ((r2 &&& 0xFF) ||| ((r3 <<< 8) &&& 0xFF00)) &&& 0xFFFF
+  valid = bxor(raw_seq &&& 0xFFFF, seq_base) == 112
+  
+  IO.puts("IV: #{Base.encode16(iv)}")
+  IO.puts("  seq_base: 0x#{Integer.to_string(seq_base, 16)}, valid: #{valid}")
+  
+  if valid do
+    # Try full decryption
+    aes_result = AESCipher.crypt(payload, iv)
+    shanda_result = ShandaCipher.decrypt(aes_result)
+    
+    if byte_size(shanda_result) >= 2 do
+      <<opcode::little-16, _rest::binary>> = shanda_result
+      IO.puts("  *** VALID IV! ***")
+      IO.puts("  Decrypted opcode: 0x#{Integer.to_string(opcode, 16)} (#{opcode})")
+      if opcode == 1 do
+        IO.puts("  *** CORRECT OPCODE! ***")
+      end
+    end
+  end
+  
+  IO.puts("")
+end)