CSGO Decrypt Overwatch

ida_dump.c

char __thiscall sub_104E1A10(int this, const char *a2, int a3, int a4)
{
  int v4; // eax@1
  int v5; // edx@2
  int v6; // ecx@2
  int v7; // eax@5
  void *v8; // esp@8
  signed int v9; // esi@9
  unsigned __int32 v10; // eax@11
  int v11; // esi@11
  int v12; // esi@13
  int v13; // ecx@13
  int v14; // eax@15
  int v15; // ecx@16
  int v16; // ecx@16
  unsigned int v17; // eax@16
  unsigned int v18; // edx@16
  char result; // al@17
  unsigned int v20; // ecx@18
  int v21; // eax@20
  int v22; // [sp-10h] [bp-1E4h]@8
  int v23; // [sp-Ch] [bp-1E0h]@8
  int v24; // [sp-8h] [bp-1DCh]@5
  char *v25; // [sp-4h] [bp-1D8h]@5
  char v26; // [sp+8h] [bp-1CCh]@5
  char key; // [sp+Dh] [bp-1C7h]@5
  int v28; // [sp+110h] [bp-C4h]@10
  unsigned int v29; // [sp+118h] [bp-BCh]@9
  char v30; // [sp+11Ch] [bp-B8h]@12
  char v31; // [sp+198h] [bp-3Ch]@12
  int v32; // [sp+1A0h] [bp-34h]@13
  int v33; // [sp+1A4h] [bp-30h]@14
  int v34; // [sp+1A8h] [bp-2Ch]@15
  char v35; // [sp+1B8h] [bp-1Ch]@8
  char ice; // [sp+1C0h] [bp-14h]@8
  int v37; // [sp+1CCh] [bp-8h]@1
  int v38; // [sp+1E0h] [bp+Ch]@11

  v4 = *(_DWORD *)(this + 4);
  v37 = this;
  if ( !v4 )
    goto LABEL_28;
  v5 = *(_DWORD *)(v4 + 8);
  v6 = *(_DWORD *)(v4 + 12);
  if ( !*(_QWORD *)(v4 + 8) || !a4 || *(_DWORD *)(a4 + 8) != 128 )
    goto LABEL_28;
  v25 = *(char **)(v4 + 12);
  v24 = v5;
  sub_101BAC10((int)&v26, "%016llX", v5, v6);
  v7 = strcmp(&key, a2);
  if ( v7 )
    v7 = -(v7 < 0) | 1;
  if ( !v7 )
  {
    IceKey::IceKey(&ice, 2);
    IceKey::set((int)&ice, (int)&key);
    v8 = alloca(16);
    _mm_storel_epi64((__m128i *)&v22, 0i64);
    LOBYTE(v24) = 0;
    v25 = *(char **)(*(int (__stdcall **)(char *, int, int, int, char *))(*(_DWORD *)dword_14A4D850 + 8))(
                      &v35,
                      v22,
                      v23,
                      v24,
                      v25);
    sub_106CA8A0((int)&v22, 9, "OVRWTCH1%08X");
    if ( sub_106C9D70(8) )
      goto LABEL_29;
    LOBYTE(v29) = 0;
    memset((char *)&v29 + 1, 0, 0x7Fu);
    v9 = 1;
    do
    {
      sub_10659710(&ice, v9 * 8 + a3, (int)((char *)&v28 + v9 * 8));// IceKey::decrypt
      ++v9;
    }
    while ( v9 < 15 );
    v10 = _byteswap_ulong(v29);
    v11 = v10 - 4;
    v38 = v10 - 4;
    if ( v10 - 4 > 0x78 )
    {
LABEL_29:
      sub_106594E0((int)&ice);
      result = 0;
    }
    else
    {
      sub_1013C6B0(&v31);
      if ( (unsigned __int8)sub_1077CDF0(&v30, v11)
        && (v12 = v37, v13 = *(_DWORD *)(v37 + 4), v32 == *(_DWORD *)(v13 + 8))
        && v33 == *(_DWORD *)(v13 + 12)
        && (v25 = &v35, v14 = (*(int (__stdcall **)(char *))(*(_DWORD *)dword_14A4D850 + 8))(&v35),
                        v34 == *(_DWORD *)v14) )
      {
        *(_DWORD *)(a4 + 8) = 8 * ((unsigned int)(v38 + 11) >> 3) + 8;
        v15 = *(_DWORD *)(v12 + 4);
        *(_DWORD *)a4 = *(_DWORD *)(v15 + 8);
        *(_DWORD *)(a4 + 4) = *(_DWORD *)(v15 + 12);
        *(_DWORD *)(a4 + 12) = *(_DWORD *)(*(_DWORD *)(v12 + 4) + 32);
        *(_BYTE *)(a4 + 16) = 1;
        v16 = *(_DWORD *)(v12 + 4);
        v17 = *(_DWORD *)(v16 + 40);
        v18 = *(_DWORD *)(v16 + 44);
        if ( v17 > v18 )
        {
          v20 = *(_DWORD *)(v16 + 36);
          if ( v20 )
          {
            v21 = v17 - v18;
            if ( v20 < v21 )
            {
              *(_DWORD *)(a4 + 20) = v20;
              *(_DWORD *)(a4 + 24) = v20 + *(_DWORD *)(*(_DWORD *)(v12 + 4) + 44);
              sub_1013C730(&v31);
              sub_106594E0((int)&ice);
              result = 1;
            }
            else
            {
              *(_DWORD *)(a4 + 20) = v21;
              *(_DWORD *)(a4 + 24) = -1;
              sub_1013C730(&v31);
              sub_106594E0((int)&ice);
              result = 1;
            }
          }
          else
          {
            *(_DWORD *)(a4 + 20) = 0;
            *(_DWORD *)(a4 + 24) = *(_DWORD *)(*(_DWORD *)(v12 + 4) + 44);
            sub_1013C730(&v31);
            sub_106594E0((int)&ice);
            result = 1;
          }
        }
        else
        {
          *(_DWORD *)(a4 + 20) = 0;
          *(_DWORD *)(a4 + 24) = -1;
          sub_1013C730(&v31);
          sub_106594E0((int)&ice);
          result = 1;
        }
      }
      else
      {
        sub_1013C730(&v31);
        sub_106594E0((int)&ice);
        result = 0;
      }
    }
  }
  else
  {
LABEL_28:
    result = 0;
  }
  return result;
}