Driver Check

gistfile1.cpp

char __thiscall HandleDriverCheck(int this, LPCSTR lpDeviceName, char *hash, int seed)
{
  int v5; // eax@4
  char v6; // cl@5
  signed int v7; // eax@6
  int v8; // edx@6
  char *v9; // ecx@6
  int v10; // esi@10
  int v11; // eax@11
  int v12; // edx@11
  int v13; // ecx@11
  int v14; // eax@13
  int v15; // edx@13
  int v16; // ecx@13
  int v17; // edx@15
  int v18; // ecx@15
  signed int v19; // eax@17
  int v20; // [sp+8h] [bp-208h]@1
  char newHash[20]; // [sp+Ch] [bp-204h]@6
  char hmacCtx[224]; // [sp+20h] [bp-1F0h]@4
  char TargetPath[260]; // [sp+100h] [bp-110h]@3
  unsigned int v24; // [sp+20Ch] [bp-4h]@1
 
  v24 = (unsigned int)&v20 ^ dword_409000;
  if ( !*(_BYTE *)(this + 45) || !QueryDosDeviceA(lpDeviceName, TargetPath, 260u) )
    return 0;
  HMACSHA1__Init((int)hmacCtx, seed);
  v5 = (int)TargetPath;
  do
    v6 = *(_BYTE *)v5++;
  while ( v6 );
  SHA1__Update((int)TargetPath, (int)hmacCtx, v5 - (_DWORD)&TargetPath[1]);
  HMACSHA1__Final((int)hmacCtx, (int)newHash);
  v9 = hash;
  v7 = 20;
  v8 = (int)newHash;
  do
  {
    if ( *(_DWORD *)v8 != *(_DWORD *)v9 )
      goto LABEL_10;
    v7 -= 4;
    v9 += 4;
    v8 += 4;
  }
  while ( (unsigned int)v7 >= 4 );
  if ( !v7 )
  {
LABEL_19:
    v19 = 0;
    return v19 == 0;
  }
LABEL_10:
  v10 = *(_BYTE *)v8 - (unsigned __int8)*v9;
  if ( *(_BYTE *)v8 == (unsigned __int8)*v9 )
  {
    v11 = v7 - 1;
    v13 = (int)(v9 + 1);
    v12 = v8 + 1;
    if ( !v11
      || (v10 = *(_BYTE *)v12 - *(_BYTE *)v13, *(_BYTE *)v12 == *(_BYTE *)v13)
      && ((v14 = v11 - 1, v16 = v13 + 1, v15 = v12 + 1, !v14)
       || (v10 = *(_BYTE *)v15 - *(_BYTE *)v16, *(_BYTE *)v15 == *(_BYTE *)v16)
       && ((v18 = v16 + 1, v17 = v15 + 1, v14 == 1)
        || (v10 = *(_BYTE *)v17 - *(_BYTE *)v18, *(_BYTE *)v17 == *(_BYTE *)v18))) )
      goto LABEL_19;
  }
  v19 = 1;
  if ( v10 <= 0 )
    v19 = -1;
  return v19 == 0;
}