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dll: FspFsctlCreateVolume: compute default security descriptor

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This commit is contained in:
Bill Zissimopoulos
2015-11-30 15:10:54 -08:00
parent dce40d03b2
commit 5aa6af2653
2 changed files with 46 additions and 0 deletions
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34
src/dll/fsctl.c
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@ -23,12 +23,45 @@ FSP_API NTSTATUS FspFsctlCreateVolume(PWSTR DevicePath,
NTSTATUS Result = STATUS_SUCCESS;
WCHAR DevicePathBuf[MAX_PATH];
FSP_FSCTL_VOLUME_PARAMS *ParamsBuf;
HANDLE Token;
PVOID DaclBuf = 0;
SECURITY_DESCRIPTOR SecurityDescriptorStruct;
PSECURITY_DESCRIPTOR SecurityDescriptorBuf = 0;
DWORD SecurityDescriptorSize, Bytes;
HANDLE DeviceHandle = INVALID_HANDLE_VALUE;
VolumePathBuf[0] = L'\0';
if (0 == SecurityDescriptor)
{
if (!OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &Token))
{
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
GetTokenInformation(Token, TokenDefaultDacl, 0, 0, &Bytes);
DaclBuf = malloc(Bytes);
if (0 == DaclBuf)
{
CloseHandle(Token);
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
if (GetTokenInformation(Token, TokenDefaultDacl, DaclBuf, Bytes, &Bytes) &&
InitializeSecurityDescriptor(&SecurityDescriptorStruct, SECURITY_DESCRIPTOR_REVISION) &&
SetSecurityDescriptorDacl(&SecurityDescriptorStruct, TRUE, DaclBuf, FALSE))
{
SecurityDescriptor = &SecurityDescriptorStruct;
CloseHandle(Token);
}
else
{
Result = FspNtStatusFromWin32(GetLastError());
CloseHandle(Token);
goto exit;
}
}
SecurityDescriptorSize = GetSecurityDescriptorLength(SecurityDescriptor);
ParamsBuf = malloc(sizeof *ParamsBuf + SecurityDescriptorSize);
if (0 == ParamsBuf)
@ -65,6 +98,7 @@ exit:
if (INVALID_HANDLE_VALUE != DeviceHandle)
CloseHandle(DeviceHandle);
free(SecurityDescriptorBuf);
free(DaclBuf);
return Result;
}