AuroraMiddleware/qt5base-lts
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Always access the 64-bit registry key to read MachineGuid

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When running a 32bit application on a 64bit Windows, the call to open
the key
"HKLM/Software/Microsoft/Cryptography/MachineGuid"
will by default be redirect to
"HKLM/Software/WOW6432Node/Microsoft/Cryptography/MachineGuid"
which does not exist.
Instead access the 64bit key from either a 32bit or 64bit application.
KEY_WOW64_64KEY has no effect on 32bit Windows.

Change-Id: Ic5e13f99d08aef2658d58a52cffe66dbab0510b8
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Roland Rossgotterer 2019-01-07 14:49:28 +01:00
parent 2780f80fae
commit 166162d830
1 changed files with 1 additions and 1 deletions
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2
src/corelib/global/qglobal.cpp
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@ -2933,7 +2933,7 @@ QByteArray QSysInfo::machineUniqueId()
#elif defined(Q_OS_WIN) && !defined(Q_OS_WINRT)
// Let's poke at the registry
HKEY key = NULL;
if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, L"SOFTWARE\\Microsoft\\Cryptography", 0, KEY_READ, &key)
if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, L"SOFTWARE\\Microsoft\\Cryptography", 0, KEY_READ | KEY_WOW64_64KEY, &key)
== ERROR_SUCCESS) {
wchar_t buffer[UuidStringLen + 1];
DWORD size = sizeof(buffer);