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https://github.com/mirkobrombin/raven.git
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53 lines
2.4 KiB
C
53 lines
2.4 KiB
C
#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <winver.h>
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static int same(const WCHAR *left, const WCHAR *right, UINT count)
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{
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for (UINT index = 0; index < count; ++index)
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if (left[index] != right[index]) return 0;
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return 1;
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}
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// A 32-bit program reads the version resource of a system library through the wide and the narrow functions.
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int raven_entry(void)
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{
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DWORD handle = 0;
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const DWORD size = GetFileVersionInfoSizeW(L"kernel32.dll", &handle);
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if (!size) return 1;
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BYTE *data = (BYTE *)HeapAlloc(GetProcessHeap(), 0, size);
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if (!data) return 2;
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if (!GetFileVersionInfoW(L"kernel32.dll", 0, size, data)) return 3;
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VS_FIXEDFILEINFO *fixed = 0;
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UINT length = 0;
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if (!VerQueryValueW(data, L"\\", (LPVOID *)&fixed, &length)) return 4;
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if (length != sizeof *fixed || fixed->dwSignature != 0xFEEF04BD) return 5;
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// The pointer comes back as a 32-bit one, inside the block.
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if ((BYTE *)fixed < data || (BYTE *)fixed >= data + size) return 6;
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if (HIWORD(fixed->dwFileVersionMS) != 10) return 7;
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const DWORD size_ansi = GetFileVersionInfoSizeA("kernel32.dll", &handle);
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if (size_ansi != size) return 8;
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BYTE *data_ansi = (BYTE *)HeapAlloc(GetProcessHeap(), 0, size_ansi);
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if (!data_ansi || !GetFileVersionInfoA("kernel32.dll", 0, size_ansi, data_ansi)) return 9;
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VS_FIXEDFILEINFO *fixed_ansi = 0;
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if (!VerQueryValueA(data_ansi, "\\", (LPVOID *)&fixed_ansi, &length)) return 10;
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if (length != sizeof *fixed_ansi || fixed_ansi->dwFileVersionMS != fixed->dwFileVersionMS || fixed_ansi->dwFileVersionLS != fixed->dwFileVersionLS) return 11;
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WORD *translation = 0;
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if (!VerQueryValueW(data, L"\\VarFileInfo\\Translation", (LPVOID *)&translation, &length)) return 12;
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if (length != 4 || translation[0] != 0x0409 || translation[1] != 0x04b0) return 13;
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WCHAR *product = 0;
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if (!VerQueryValueW(data, L"\\StringFileInfo\\040904b0\\InternalName", (LPVOID *)&product, &length)) return 14;
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if (length != 13 || !same(product, L"kernel32.dll", 12) || product[12]) return 15;
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// Strings of the block are wide: the narrow query for one is refused, and says so.
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SetLastError(0);
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if (VerQueryValueA(data_ansi, "\\StringFileInfo\\040904b0\\InternalName", (LPVOID *)&product, &length)) return 16;
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if (GetLastError() != 120) return 17;
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// A name that is not there.
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if (GetFileVersionInfoSizeA("no-such-file.dll", &handle)) return 18;
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if (GetFileVersionInfoSizeW(L"no-such-file.dll", &handle)) return 19;
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return 0;
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}
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