Angry Birds 2 Index File Generator

LocalClientStorageProvider_GenerateAndSaveIndexFile.c

int __cdecl LocalClientStorageProvider__GenerateAndSaveIndexFile(int instance, char *path)
{
  int AES_0; // esi
  int AES_1; // esi
  int ms; // esi
  int bw; // edi
  int v6; // ebp
  int v7; // eax
  int v8; // ebp
  unsigned int AES_2; // eax
  int v10; // eax
  int v11; // eax
  int AES_3; // ebp
  int AES_4; // ebp
  int AES_5; // ebp
  int AES_6; // ebp
  int AES_7; // ebp
  int v17; // eax
  int AES_8; // ebp
  int v19; // eax
  int array_0; // esi
  signed int index; // ebp
  char xor_val; // al
  int v23; // edi
  int v24; // eax
  int v25; // eax
  int v26; // eax
  int l_433; // esi
  unsigned int l_433_len; // ecx
  unsigned int mod_val; // edi
  int v30; // eax
  int *FS_0; // esi
  int FS_PTR; // ecx
  unsigned int v33; // ebp
  int v34; // edx
  unsigned __int16 v35; // si
  int FS_1; // esi
  int v37; // eax
  int array_1; // [esp+14h] [ebp-18h]
  int output; // [esp+14h] [ebp-18h]

  // private static byte[] l_433; // 0x0
  // protected static string SaveDirectory; // 0x4
  // private const int HeaderLength = 4; // 0x0
  // private IFileSystem <FileSystem>k__BackingField; // 0x8
  // private AesManaged m_aes; // 0xC
  if ( !(byte_2341B8B & 1) )
  {
    sub_1609D44("is_generic");
    byte_2341B8B = 1;
  }
  AES_0 = *(_DWORD *)(instance + 12);
  if ( !AES_0 )
    NullPointerReference();
  (*(void (__cdecl **)(int, _DWORD))(*(_DWORD *)AES_0 + 372))(AES_0, *(_DWORD *)(*(_DWORD *)AES_0 + 376));// this.aes.GenerateIV();
  AES_1 = *(_DWORD *)(instance + 12);
  if ( !AES_1 )
    NullPointerReference();
  (*(void (__cdecl **)(int, _DWORD))(*(_DWORD *)AES_1 + 380))(AES_1, *(_DWORD *)(*(_DWORD *)AES_1 + 384));// this.aes.GenerateKey();
  ms = sub_1645020(unk_23184AC);                // MemoryStream ms = new MemoryStream();
  MemoryStream___ctor(ms);
  bw = sub_1645020(unk_2318474);
  BinaryWriter___ctor_65775(bw, ms);            // BinaryWriter bw = new BinaryWriter((Stream)ms);
  v6 = unk_23180FC;
  sub_15FCC36(unk_23180FC);
  v7 = sub_1649CFA(v6, 2);
  v8 = v7;
  if ( !v7 )
    NullPointerReference();
  AES_2 = *(_DWORD *)(v7 + 12);
  if ( !AES_2 )
  {
    v10 = sub_1637A1E();
    Exception(v10, 0);
  }
  *(_BYTE *)(v8 + 16) = -85;
  if ( AES_2 <= 1 )
  {
    v11 = sub_1637A1E();
    Exception(v11, 0);
  }
  *(_BYTE *)(v8 + 17) = -70;
  if ( !bw )
    NullPointerReference();
  (*(void (__cdecl **)(int, int, _DWORD))(*(_DWORD *)bw + 260))(bw, v8, *(_DWORD *)(*(_DWORD *)bw + 264));// bw.Write(new byte[2] {0xAB, 0xBA});
  if ( !bw )
    NullPointerReference();
  (*(void (__cdecl **)(int, signed int, _DWORD))(*(_DWORD *)bw + 284))(bw, 1, *(_DWORD *)(*(_DWORD *)bw + 288));// bw.Write((short)1);
  AES_3 = *(_DWORD *)(instance + 12);
  if ( !AES_3 )
    NullPointerReference();
  AES_4 = (*(int (__cdecl **)(int, _DWORD))(*(_DWORD *)AES_3 + 252))(AES_3, *(_DWORD *)(*(_DWORD *)AES_3 + 256));
  if ( !AES_4 )
    NullPointerReference();
  if ( !bw )
    NullPointerReference();
  (*(void (__cdecl **)(int, _DWORD, _DWORD))(*(_DWORD *)bw + 284))(
    bw,
    *(signed __int16 *)(AES_4 + 12),
    *(_DWORD *)(*(_DWORD *)bw + 288));          // bw.Write((short)this.aes.IV.Length);
  AES_5 = *(_DWORD *)(instance + 12);
  if ( !AES_5 )
    NullPointerReference();
  AES_6 = (*(int (__cdecl **)(int, _DWORD))(*(_DWORD *)AES_5 + 268))(AES_5, *(_DWORD *)(*(_DWORD *)AES_5 + 272));
  if ( !AES_6 )
    NullPointerReference();
  if ( !bw )
    NullPointerReference();
  (*(void (__cdecl **)(int, _DWORD, _DWORD))(*(_DWORD *)bw + 284))(
    bw,
    *(signed __int16 *)(AES_6 + 12),
    *(_DWORD *)(*(_DWORD *)bw + 288));          // bw.Write((short)this.aes.Key.Length);
  AES_7 = *(_DWORD *)(instance + 12);
  if ( !AES_7 )
    NullPointerReference();
  v17 = (*(int (__cdecl **)(int, _DWORD))(*(_DWORD *)AES_7 + 252))(AES_7, *(_DWORD *)(*(_DWORD *)AES_7 + 256));
  (*(void (__cdecl **)(int, int, _DWORD))(*(_DWORD *)bw + 260))(bw, v17, *(_DWORD *)(*(_DWORD *)bw + 264));// bw.Write(this.aes.IV);
  AES_8 = *(_DWORD *)(instance + 12);
  if ( !AES_8 )
    NullPointerReference();
  v19 = (*(int (__cdecl **)(int, _DWORD))(*(_DWORD *)AES_8 + 268))(AES_8, *(_DWORD *)(*(_DWORD *)AES_8 + 272));
  (*(void (__cdecl **)(int, int, _DWORD))(*(_DWORD *)bw + 260))(bw, v19, *(_DWORD *)(*(_DWORD *)bw + 264));// bw.Write(this.aes.Key);
  (*(void (__cdecl **)(int, _DWORD))(*(_DWORD *)bw + 236))(bw, *(_DWORD *)(*(_DWORD *)bw + 240));// bw.Flush();
  if ( !ms )
    NullPointerReference();
  array_0 = (*(int (__cdecl **)(int, _DWORD))(*(_DWORD *)ms + 404))(ms, *(_DWORD *)(*(_DWORD *)ms + 408));
  array_1 = array_0;                            // byte[] array = ms.ToArray();
  for ( index = 20; ; ++index )
  {
    v23 = index - 16;
    if ( !array_0 )
      NullPointerReference();
    v24 = *(_DWORD *)(array_0 + 12);
    if ( v23 >= v24 )
      break;
    if ( v24 <= (unsigned int)v23 )
    {
      v25 = sub_1637A1E();
      Exception(v25, 0);
    }
    v26 = unk_231BBB4;
    if ( *(_BYTE *)(unk_231BBB4 + 178) & 1 && !*(_DWORD *)(unk_231BBB4 + 96) )
    {
      sub_161DF48(unk_231BBB4);
      v26 = unk_231BBB4;
    }
    l_433 = **(_DWORD **)(v26 + 80);            // l_433 - The key used to encrypt/decrypt/hash player data
    if ( !l_433 )
      NullPointerReference();
    l_433_len = *(_DWORD *)(l_433 + 12);        // l_433.Length
    mod_val = (index - 20) % (signed int)l_433_len;// (index - 4) % l_433.Length
    if ( l_433_len <= mod_val )
    {
      v30 = sub_1637A1E();
      Exception(v30, 0);
    }
    xor_val = *(_BYTE *)(l_433 + mod_val + 16); // l_433[(index - 4) % l_433.Length]
    array_0 = array_1;
    *(_BYTE *)(array_0 + index) ^= xor_val;     // array_0[index] ^= xor_val;
  }
  output = array_0;
  FS_0 = *(int **)(instance + 8);
  if ( !FS_0 )
    NullPointerReference();
  FS_PTR = *FS_0;
  LOWORD(v33) = *(_WORD *)(*FS_0 + 170);
  if ( (_WORD)v33 )
  {
    v34 = *(_DWORD *)(FS_PTR + 76);
    v35 = 0;
    v33 = (unsigned __int16)v33;
    while ( *(_DWORD *)(v34 + 8 * v35) != unk_231DFFC )
    {
      if ( ++v35 >= v33 )
        goto LABEL_55;
    }
    v37 = FS_PTR + 8 * *(_DWORD *)(v34 + 8 * v35 + 4) + 180;
    FS_1 = *(_DWORD *)(instance + 8);
  }
  else
  {
LABEL_55:
    FS_1 = *(_DWORD *)(instance + 8);
    v37 = sub_15FF432(*(_DWORD *)(instance + 8), unk_231DFFC, 0);
  }
  return (*(int (__cdecl **)(int, char *, int, _DWORD))v37)(FS_1, path, output, *(_DWORD *)(v37 + 4));// this.FS_1.WriteAllBytes(path, output);
}