8272da638e
When debugger is attached, CreateDirectory() with SYSTEM-only SID fails with "This security ID may not be assigned as the owner of this object. (Code 0x0000051B)". Signed-off-by: Simon Rozman <simon@rozman.si>
453 lines
17 KiB
C
453 lines
17 KiB
C
/* SPDX-License-Identifier: GPL-2.0
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*
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* Copyright (C) 2018-2020 WireGuard LLC. All Rights Reserved.
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*/
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#include "pch.h"
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#pragma warning(disable : 4221) /* nonstandard: address of automatic in initializer */
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BOOL
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DriverIsOurHardwareID(_In_z_ const WCHAR *Hwids)
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{
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for (; Hwids[0]; Hwids += wcslen(Hwids) + 1)
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if (!_wcsicmp(Hwids, WINTUN_HWID))
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return TRUE;
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return FALSE;
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}
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BOOL
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DriverIsOurDrvInfoDetail(_In_ const SP_DRVINFO_DETAIL_DATA_W *DrvInfoDetailData)
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{
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return DrvInfoDetailData->CompatIDsOffset > 1 && !_wcsicmp(DrvInfoDetailData->HardwareID, WINTUN_HWID) ||
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DrvInfoDetailData->CompatIDsLength &&
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DriverIsOurHardwareID(DrvInfoDetailData->HardwareID + DrvInfoDetailData->CompatIDsOffset);
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}
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#if defined(HAVE_EV) || defined(HAVE_WHQL)
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/* We can't use RtlGetVersion, because appcompat's aclayers.dll shims it to report Vista
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* when run from legacy contexts. So, we instead use the undocumented RtlGetNtVersionNumbers.
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*
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* Another way would be reading from the PEB directly:
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* ((DWORD *)NtCurrentTeb()->ProcessEnvironmentBlock)[sizeof(void *) == 8 ? 70 : 41]
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* Or just read from KUSER_SHARED_DATA the same way on 32-bit and 64-bit:
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* *(DWORD *)0x7FFE026C
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*/
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extern VOID NTAPI
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RtlGetNtVersionNumbers(_Out_opt_ DWORD *MajorVersion, _Out_opt_ DWORD *MinorVersion, _Out_opt_ DWORD *BuildNumber);
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static BOOL
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HaveWHQL()
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{
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# if defined(HAVE_EV) && defined(HAVE_WHQL)
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DWORD MajorVersion;
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RtlGetNtVersionNumbers(&MajorVersion, NULL, NULL);
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return MajorVersion >= 10;
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# elif defined(HAVE_EV)
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return FALSE;
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# elif defined(HAVE_WHQL)
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return TRUE;
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# endif
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}
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static const CHAR *
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SkipWSpace(_In_ const CHAR *Beg, _In_ const CHAR *End)
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{
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for (; Beg < End && iswspace(*Beg); ++Beg)
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;
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return Beg;
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}
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static const CHAR *
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SkipNonLF(_In_ const CHAR *Beg, _In_ const CHAR *End)
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{
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for (; Beg < End && *Beg != '\n'; ++Beg)
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;
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return Beg;
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}
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WINTUN_STATUS
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DriverGetVersion(_Out_ FILETIME *DriverDate, _Out_ DWORDLONG *DriverVersion)
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{
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const VOID *LockedResource;
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DWORD SizeResource;
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DWORD Result = ResourceGetAddress(HaveWHQL() ? L"wintun-whql.inf" : L"wintun.inf", &LockedResource, &SizeResource);
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if (Result != ERROR_SUCCESS)
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return LOG(WINTUN_LOG_ERR, L"Failed to locate resource"), Result;
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enum
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{
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SectNone,
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SectUnknown,
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SectVersion
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} Section = SectNone;
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for (const CHAR *Inf = (const CHAR *)LockedResource, *InfEnd = Inf + SizeResource; Inf < InfEnd; ++Inf)
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{
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if (*Inf == ';')
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{
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Inf = SkipNonLF(Inf + 1, InfEnd);
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continue;
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}
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Inf = SkipWSpace(Inf, InfEnd);
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if (*Inf == '[')
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{
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Section = Inf + 9 <= InfEnd && !_strnicmp(Inf, "[Version]", 9) ? SectVersion : SectUnknown;
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}
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else if (Section == SectVersion)
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{
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if (Inf + 9 <= InfEnd && !_strnicmp(Inf, "DriverVer", 9))
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{
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Inf = SkipWSpace(Inf + 9, InfEnd);
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if (Inf < InfEnd && *Inf == '=')
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{
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Inf = SkipWSpace(Inf + 1, InfEnd);
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/* Duplicate buffer, as RT_RCDATA resource is not guaranteed to be zero-terminated. */
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CHAR buf[0x100];
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size_t n = InfEnd - Inf;
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if (n >= _countof(buf))
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n = _countof(buf) - 1;
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strncpy_s(buf, _countof(buf), Inf, n);
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buf[n] = 0;
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const CHAR *p = buf;
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CHAR *p_next;
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unsigned long date[3] = { 0, 0, 0 };
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for (size_t i = 0;; ++i, ++p)
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{
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date[i] = strtoul(p, &p_next, 10);
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p = p_next;
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if (i >= _countof(date) - 1)
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break;
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if (*p != '/' && *p != '-')
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{
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LOG(WINTUN_LOG_ERR, L"Unexpected date delimiter");
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return ERROR_INVALID_DATA;
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}
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}
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if (date[0] < 1 || date[0] > 12 || date[1] < 1 || date[1] > 31 || date[2] < 1601 || date[2] > 30827)
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{
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LOG(WINTUN_LOG_ERR, L"Invalid date");
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return ERROR_INVALID_DATA;
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}
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const SYSTEMTIME st = { .wYear = (WORD)date[2], .wMonth = (WORD)date[0], .wDay = (WORD)date[1] };
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SystemTimeToFileTime(&st, DriverDate);
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p = SkipWSpace(p, buf + n);
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ULONGLONG version[4] = { 0, 0, 0, 0 };
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if (*p == ',')
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{
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p = SkipWSpace(p + 1, buf + n);
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for (size_t i = 0;; ++i, ++p)
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{
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version[i] = strtoul(p, &p_next, 10);
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if (version[i] > 0xffff)
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{
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LOG(WINTUN_LOG_ERR, L"Version field may not exceed 65535");
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return ERROR_INVALID_DATA;
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}
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p = p_next;
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if (i >= _countof(version) - 1 || !*p || *p == ';' || iswspace(*p))
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break;
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if (*p != '.')
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{
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LOG(WINTUN_LOG_ERR, L"Unexpected version delimiter");
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return ERROR_INVALID_DATA;
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}
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}
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}
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*DriverVersion = (version[0] << 48) | (version[1] << 32) | (version[2] << 16) | version[3];
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return ERROR_SUCCESS;
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}
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}
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}
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Inf = SkipNonLF(Inf, InfEnd);
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}
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LOG(WINTUN_LOG_ERR, L"DriverVer not found in INF resource");
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return ERROR_FILE_NOT_FOUND;
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}
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/* This function does not log any errors, not to flood the log when called from the EnsureDriverUnloaded() loop. */
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static BOOL IsDriverLoaded(VOID)
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{
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VOID *StackBuffer[0x80];
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VOID **Drivers = StackBuffer;
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DWORD Size = 0;
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if (!EnumDeviceDrivers(Drivers, sizeof(StackBuffer), &Size))
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return FALSE;
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if (Size > sizeof(StackBuffer))
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{
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HANDLE Heap = GetProcessHeap();
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Drivers = HeapAlloc(Heap, 0, Size);
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if (!Drivers)
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{
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SetLastError(ERROR_OUTOFMEMORY);
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return FALSE;
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}
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if (!EnumDeviceDrivers(Drivers, Size, &Size))
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{
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DWORD Result = GetLastError();
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HeapFree(Heap, 0, Drivers);
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SetLastError(Result);
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return FALSE;
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}
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}
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BOOL Found = FALSE;
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for (DWORD i = Size / sizeof(Drivers[0]); i-- > 0;)
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{
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WCHAR MaybeWintun[11];
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if (GetDeviceDriverBaseNameW(Drivers[i], MaybeWintun, _countof(MaybeWintun)) == 10 &&
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!_wcsicmp(MaybeWintun, L"wintun.sys"))
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{
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Found = TRUE;
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break;
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}
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}
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if (Drivers != StackBuffer)
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HeapFree(GetProcessHeap(), 0, Drivers);
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SetLastError(ERROR_SUCCESS);
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return Found;
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}
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static BOOL EnsureDriverUnloaded(VOID)
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{
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BOOL Loaded;
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for (int i = 0; (Loaded = IsDriverLoaded()) != 0 && i < 300; ++i)
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Sleep(50);
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return !Loaded;
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}
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static WINTUN_STATUS
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InstallCertificate(_In_z_ const WCHAR *SignedResource)
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{
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LOG(WINTUN_LOG_INFO, L"Trusting code signing certificate");
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const VOID *LockedResource;
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DWORD SizeResource;
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DWORD Result = ResourceGetAddress(SignedResource, &LockedResource, &SizeResource);
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if (Result != ERROR_SUCCESS)
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return LOG(WINTUN_LOG_ERR, L"Failed to locate resource"), Result;
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const CERT_BLOB CertBlob = { .cbData = SizeResource, .pbData = (BYTE *)LockedResource };
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HCERTSTORE QueriedStore;
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if (!CryptQueryObject(
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CERT_QUERY_OBJECT_BLOB,
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&CertBlob,
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CERT_QUERY_CONTENT_FLAG_PKCS7_SIGNED_EMBED,
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CERT_QUERY_FORMAT_FLAG_ALL,
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0,
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0,
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0,
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0,
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&QueriedStore,
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0,
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NULL))
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return LOG_LAST_ERROR(L"Failed to find certificate");
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HCERTSTORE TrustedStore =
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CertOpenStore(CERT_STORE_PROV_SYSTEM, 0, 0, CERT_SYSTEM_STORE_LOCAL_MACHINE, L"TrustedPublisher");
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if (!TrustedStore)
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{
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Result = LOG_LAST_ERROR(L"Failed to open store");
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goto cleanupQueriedStore;
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}
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LPSTR CodeSigningOid[] = { szOID_PKIX_KP_CODE_SIGNING };
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CERT_ENHKEY_USAGE EnhancedUsage = { .cUsageIdentifier = 1, .rgpszUsageIdentifier = CodeSigningOid };
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for (const CERT_CONTEXT *CertContext = NULL; (CertContext = CertFindCertificateInStore(
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QueriedStore,
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X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
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CERT_FIND_EXT_ONLY_ENHKEY_USAGE_FLAG,
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CERT_FIND_ENHKEY_USAGE,
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&EnhancedUsage,
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CertContext)) != NULL;)
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{
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CERT_EXTENSION *Ext = CertFindExtension(
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szOID_BASIC_CONSTRAINTS2, CertContext->pCertInfo->cExtension, CertContext->pCertInfo->rgExtension);
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CERT_BASIC_CONSTRAINTS2_INFO Constraints;
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DWORD Size = sizeof(Constraints);
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if (Ext &&
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CryptDecodeObjectEx(
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X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
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szOID_BASIC_CONSTRAINTS2,
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Ext->Value.pbData,
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Ext->Value.cbData,
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0,
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NULL,
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&Constraints,
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&Size) &&
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!Constraints.fCA)
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if (!CertAddCertificateContextToStore(TrustedStore, CertContext, CERT_STORE_ADD_REPLACE_EXISTING, NULL))
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{
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LOG_LAST_ERROR(L"Failed to add certificate to store");
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Result = Result != ERROR_SUCCESS ? Result : GetLastError();
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}
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}
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CertCloseStore(TrustedStore, 0);
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cleanupQueriedStore:
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CertCloseStore(QueriedStore, 0);
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return Result;
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}
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static WINTUN_STATUS
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InstallDriver(_In_ BOOL UpdateExisting)
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{
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WCHAR WindowsDirectory[MAX_PATH];
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if (!GetWindowsDirectoryW(WindowsDirectory, _countof(WindowsDirectory)))
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return LOG_LAST_ERROR(L"Failed to get Windows folder");
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WCHAR WindowsTempDirectory[MAX_PATH];
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if (!PathCombineW(WindowsTempDirectory, WindowsDirectory, L"Temp"))
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return ERROR_BUFFER_OVERFLOW;
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UCHAR RandomBytes[32] = { 0 };
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# pragma warning(suppress : 6387)
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if (!RtlGenRandom(RandomBytes, sizeof(RandomBytes)))
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return LOG_LAST_ERROR(L"Failed to generate random");
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WCHAR RandomSubDirectory[sizeof(RandomBytes) * 2 + 1];
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for (int i = 0; i < sizeof(RandomBytes); ++i)
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swprintf_s(&RandomSubDirectory[i * 2], 3, L"%02x", RandomBytes[i]);
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WCHAR RandomTempSubDirectory[MAX_PATH];
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if (!PathCombineW(RandomTempSubDirectory, WindowsTempDirectory, RandomSubDirectory))
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return ERROR_BUFFER_OVERFLOW;
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if (!CreateDirectoryW(RandomTempSubDirectory, SecurityAttributes))
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return LOG_LAST_ERROR(L"Failed to create temporary folder");
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DWORD Result = ERROR_SUCCESS;
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WCHAR CatPath[MAX_PATH] = { 0 };
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WCHAR SysPath[MAX_PATH] = { 0 };
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WCHAR InfPath[MAX_PATH] = { 0 };
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if (!PathCombineW(CatPath, RandomTempSubDirectory, L"wintun.cat") ||
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!PathCombineW(SysPath, RandomTempSubDirectory, L"wintun.sys") ||
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!PathCombineW(InfPath, RandomTempSubDirectory, L"wintun.inf"))
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{
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Result = ERROR_BUFFER_OVERFLOW;
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goto cleanupDirectory;
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}
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BOOL UseWHQL = HaveWHQL();
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if (!UseWHQL && (Result = InstallCertificate(L"wintun.sys")) != ERROR_SUCCESS)
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LOG(WINTUN_LOG_WARN, L"Unable to install code signing certificate");
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LOG(WINTUN_LOG_INFO, L"Copying resources to temporary path");
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if ((Result = ResourceCopyToFile(CatPath, UseWHQL ? L"wintun-whql.cat" : L"wintun.cat")) != ERROR_SUCCESS ||
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(Result = ResourceCopyToFile(SysPath, UseWHQL ? L"wintun-whql.sys" : L"wintun.sys")) != ERROR_SUCCESS ||
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(Result = ResourceCopyToFile(InfPath, UseWHQL ? L"wintun-whql.inf" : L"wintun.inf")) != ERROR_SUCCESS)
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{
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LOG(WINTUN_LOG_ERR, L"Failed to copy resources");
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goto cleanupDelete;
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}
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LOG(WINTUN_LOG_INFO, L"Installing driver");
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if (!SetupCopyOEMInfW(InfPath, NULL, SPOST_PATH, 0, NULL, 0, NULL, NULL))
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Result = LOG_LAST_ERROR(L"Could not install driver to store");
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BOOL RebootRequired = FALSE;
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if (UpdateExisting &&
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!UpdateDriverForPlugAndPlayDevicesW(
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NULL, WINTUN_HWID, InfPath, INSTALLFLAG_FORCE | INSTALLFLAG_NONINTERACTIVE, &RebootRequired))
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LOG_LAST_ERROR(L"Could not update existing adapters");
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if (RebootRequired)
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LOG(WINTUN_LOG_WARN, L"A reboot might be required, which really should not be the case");
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cleanupDelete:
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DeleteFileW(CatPath);
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DeleteFileW(SysPath);
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DeleteFileW(InfPath);
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cleanupDirectory:
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RemoveDirectoryW(RandomTempSubDirectory);
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return Result;
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}
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static WINTUN_STATUS RemoveDriver(VOID)
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{
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HDEVINFO DevInfo = SetupDiGetClassDevsW(&GUID_DEVCLASS_NET, NULL, NULL, 0);
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if (!DevInfo)
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return LOG_LAST_ERROR(L"Failed to request device information");
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DWORD Result = ERROR_SUCCESS;
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if (!SetupDiBuildDriverInfoList(DevInfo, NULL, SPDIT_CLASSDRIVER))
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{
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Result = LOG_LAST_ERROR(L"Failed to build list of drivers");
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goto cleanupDeviceInfoSet;
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}
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HANDLE Heap = GetProcessHeap();
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for (DWORD EnumIndex = 0;; ++EnumIndex)
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{
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SP_DRVINFO_DATA_W DrvInfoData = { .cbSize = sizeof(DrvInfoData) };
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if (!SetupDiEnumDriverInfoW(DevInfo, NULL, SPDIT_CLASSDRIVER, EnumIndex, &DrvInfoData))
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{
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if (GetLastError() == ERROR_NO_MORE_ITEMS)
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break;
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continue;
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}
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SP_DRVINFO_DETAIL_DATA_W *DrvInfoDetailData;
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if (AdapterGetDrvInfoDetail(DevInfo, NULL, &DrvInfoData, &DrvInfoDetailData) != ERROR_SUCCESS)
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{
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LOG(WINTUN_LOG_WARN, L"Failed getting driver info detail");
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continue;
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}
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if (!DriverIsOurDrvInfoDetail(DrvInfoDetailData))
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{
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HeapFree(Heap, 0, DrvInfoDetailData);
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continue;
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}
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PathStripPathW(DrvInfoDetailData->InfFileName);
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LOG(WINTUN_LOG_INFO, L"Removing existing driver");
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if (!SetupUninstallOEMInfW(DrvInfoDetailData->InfFileName, SUOI_FORCEDELETE, NULL))
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{
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LOG_LAST_ERROR(L"Unable to remove existing driver");
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Result = Result != ERROR_SUCCESS ? Result : GetLastError();
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}
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HeapFree(Heap, 0, DrvInfoDetailData);
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}
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SetupDiDestroyDriverInfoList(DevInfo, NULL, SPDIT_CLASSDRIVER);
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cleanupDeviceInfoSet:
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SetupDiDestroyDeviceInfoList(DevInfo);
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return Result;
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}
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WINTUN_STATUS DriverInstallOrUpdate(VOID)
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{
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HANDLE Heap = GetProcessHeap();
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HDEVINFO DevInfo = SetupDiGetClassDevsExW(&GUID_DEVCLASS_NET, NULL, NULL, DIGCF_PRESENT, NULL, NULL, NULL);
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if (DevInfo == INVALID_HANDLE_VALUE)
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return LOG_LAST_ERROR(L"Failed to get present class devices");
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SP_DEVINFO_DATA_LIST *ExistingAdapters = NULL;
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if (IsDriverLoaded())
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{
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AdapterDisableAllOurs(DevInfo, &ExistingAdapters);
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LOG(WINTUN_LOG_INFO, L"Waiting for driver to unload from kernel");
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if (!EnsureDriverUnloaded())
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LOG(WINTUN_LOG_WARN, L"Unable to unload driver, which means a reboot will likely be required");
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}
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DWORD Result = ERROR_SUCCESS;
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if ((Result = RemoveDriver()) != ERROR_SUCCESS)
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{
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LOG(WINTUN_LOG_ERR, L"Failed to uninstall old drivers");
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goto cleanupAdapters;
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}
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if ((Result = InstallDriver(!!ExistingAdapters)) != ERROR_SUCCESS)
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{
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LOG(WINTUN_LOG_ERR, L"Failed to install driver");
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goto cleanupAdapters;
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}
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LOG(WINTUN_LOG_INFO, L"Installation successful");
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cleanupAdapters:;
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if (ExistingAdapters)
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{
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AdapterEnableAll(DevInfo, ExistingAdapters);
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while (ExistingAdapters)
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{
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SP_DEVINFO_DATA_LIST *Next = ExistingAdapters->Next;
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HeapFree(Heap, 0, ExistingAdapters);
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ExistingAdapters = Next;
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}
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}
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SetupDiDestroyDeviceInfoList(DevInfo);
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return Result;
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}
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WINTUN_STATUS DriverUninstall(VOID)
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{
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AdapterDeleteAllOurs();
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DWORD Result = RemoveDriver();
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if (Result == ERROR_SUCCESS)
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LOG(WINTUN_LOG_INFO, L"Uninstallation successful");
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else
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LOG(WINTUN_LOG_ERR, L"Failed to uninstall driver");
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return Result;
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}
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#endif
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