[PATCH] advapi32: MachineGUID to have same value in WoW64

[Brendan McGrath]

Currently, when running the following two commands in a new prefix:
wine reg query 'HKLM\Software\Microsoft\Cryptography' /v MachineGuid
wine64 reg query 'HKLM\Software\Microsoft\Cryptography' /v MachineGuid

Two different values are returned. This can cause an issue when, for
example, a 32-bit Launcher and 64-bit application expect the same value.

This patch ensures that when the 64-bit GUID is created, the 32-bit
GUID is created as well (with the same value).

Signed-off-by: Brendan McGrath <brendan at redmandi.com>
---

I considered a few options on how to achieve this; but ended up with
this option as it seemed the simplest. However, it does leave the
possiblity for an application or user to change one and leave the other.

I did note that Windows doesn't appear to have a MachineGuid entry for
WoW, so it looks like Windows just uses the one entry. But I wasn't
sure of the best way to achieve that in Wine (and couldn't find a
precedent).

 dlls/advapi32/crypt.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/dlls/advapi32/crypt.c b/dlls/advapi32/crypt.c
index 01d58804235..0ea64b52226 100644
--- a/dlls/advapi32/crypt.c
+++ b/dlls/advapi32/crypt.c
@@ -313,6 +313,14 @@ static void CRYPT_CreateMachineGuid(void)
                         RegSetValueExW(key, machineGuidW, 0, REG_SZ,
                                        (const BYTE *)buf,
                                        (lstrlenW(buf)+1)*sizeof(WCHAR));
+                        r = RegOpenKeyExW(HKEY_LOCAL_MACHINE, cryptographyW, 0,
+                                           KEY_ALL_ACCESS | KEY_WOW64_32KEY, &key);
+                        if (!r)
+                        {
+                            RegSetValueExW(key, machineGuidW, 0, REG_SZ,
+                                           (const BYTE *)buf,
+                                           (lstrlenW(buf)+1)*sizeof(WCHAR));
+                        }
                     }
 		}
 		RegCloseKey(key);
-- 
2.17.1