Windows: Implement detection of Hibernate and Fast Startup and disable them if RAM encryption is activated.

src/Common/Dlgcode.c

@@ -14896,3 +14896,76 @@ void PasswordEditDropTarget::GotDrop(CLIPFORMAT format)
 	}
 }
 
+
+/*
+ * Query the status of Hibernate and Fast Startup
+ */
+
+typedef BOOLEAN (WINAPI *GetPwrCapabilitiesFn)(
+  PSYSTEM_POWER_CAPABILITIES lpspc
+);
+
+BOOL GetHibernateStatus (BOOL& bHibernateEnabled, BOOL& bHiberbootEnabled)
+{
+	wchar_t szPowrProfPath[MAX_PATH] = {0};
+	HMODULE hPowrProf = NULL;
+	BOOL bResult = FALSE;
+
+	bHibernateEnabled = bHiberbootEnabled = FALSE;
+
+	if (GetSystemDirectory(szPowrProfPath, MAX_PATH))
+		StringCchCatW (szPowrProfPath, MAX_PATH, L"\\PowrProf.dll");
+	else
+		StringCchCopyW (szPowrProfPath, MAX_PATH, L"C:\\Windows\\System32\\PowrProf.dll");
+
+	hPowrProf = LoadLibrary (szPowrProfPath);
+	if (hPowrProf)
+	{
+		GetPwrCapabilitiesFn GetPwrCapabilitiesPtr = (GetPwrCapabilitiesFn) GetProcAddress (hPowrProf, "GetPwrCapabilities");
+		if ( GetPwrCapabilitiesPtr)
+		{
+			SYSTEM_POWER_CAPABILITIES spc;
+			BOOLEAN bRet = GetPwrCapabilitiesPtr (&spc);
+			if (bRet)
+			{
+				DWORD dwHibernateEnabled = 0;
+				DWORD dwHiberbootEnabled = 0;
+
+				if (spc.SystemS4)
+				{
+					dwHibernateEnabled = 1;
+					if(!ReadLocalMachineRegistryDword (L"SYSTEM\\CurrentControlSet\\Control\\Power", L"HibernateEnabled", &dwHibernateEnabled))
+					{
+						// starting from Windows 10 1809 (Build 17763), HibernateEnabledDefault is used when HibernateEnabled is absent
+						if (IsOSVersionAtLeast (WIN_10, 0) && CurrentOSBuildNumber >= 17763)
+							ReadLocalMachineRegistryDword (L"SYSTEM\\CurrentControlSet\\Control\\Power", L"HibernateEnabledDefault", &dwHibernateEnabled);
+					}
+				}
+
+				// check if Fast Startup / Hybrid Boot is enabled
+				if (IsOSVersionAtLeast (WIN_8, 0) && spc.spare2[0])
+				{
+					dwHiberbootEnabled = 1;
+					ReadLocalMachineRegistryDword (L"SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Power", L"HiberbootEnabled", &dwHiberbootEnabled);
+				}
+
+				if (dwHibernateEnabled)
+					bHibernateEnabled = TRUE;
+				else
+					bHibernateEnabled = FALSE;
+
+				if (dwHiberbootEnabled)
+					bHiberbootEnabled = TRUE;
+				else
+					bHiberbootEnabled = FALSE;
+
+				bResult = TRUE;
+			}
+		}
+
+		FreeLibrary (hPowrProf);
+	}
+
+	return bResult;
+}
+

src/Common/Dlgcode.h

@@ -745,6 +745,7 @@ public:
 	DWORD	GotEnter(void);
 };
 
+BOOL GetHibernateStatus (BOOL& bHibernateEnabled, BOOL& bHiberbootEnabled);
 
 #endif // __cplusplus
 

src/Common/Language.xml

@@ -1444,6 +1444,7 @@
     <entry lang="en" key="IDC_FORCE_NEXT_BOOT_VERACRYPT">Force machine to boot on VeraCrypt in the next startup</entry>
     <entry lang="en" key="IDC_FORCE_VERACRYPT_BOOT_ENTRY">Force the presence of VeraCrypt entry in the EFI firmware boot menu</entry>
     <entry lang="en" key="IDC_FORCE_VERACRYPT_FIRST_BOOT_ENTRY">Force VeraCrypt entry to be the first in the EFI firmware boot menu</entry>
+    <entry lang="en" key="RAM_ENCRYPTION_DISABLE_HIBERNATE">WARNING: RAM encryption is not compatible with Windows Hibernate and Windows Fast Startup features. VeraCrypt needs to disable them before activating RAM encryption.\n\nContinue?</entry>
   </localization>
   <xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
     <xs:element name="VeraCrypt">

src/Mount/Mount.c

@@ -11462,7 +11462,26 @@ static BOOL CALLBACK PerformanceSettingsDlgProc (HWND hwndDlg, UINT msg, WPARAM
 					{
 						BOOL originalRamEncryptionEnabled = (driverConfig & VC_DRIVER_CONFIG_ENABLE_RAM_ENCRYPTION)? TRUE : FALSE;
 						if (originalRamEncryptionEnabled != enableRamEncryption)
+						{
+							if (enableRamEncryption)
+							{
+								// Disable Hibernate and Fast Startup if they are enabled
+								BOOL bHibernateEnabled, bHiberbootEnabled;
+								if (GetHibernateStatus (bHibernateEnabled, bHiberbootEnabled))
+								{
+									if (bHibernateEnabled)
+									{										
+										BootEncObj->WriteLocalMachineRegistryDwordValue (L"SYSTEM\\CurrentControlSet\\Control\\Power", L"HibernateEnabled", 0);
+									}
+
+									if (bHiberbootEnabled)
+									{										
+										BootEncObj->WriteLocalMachineRegistryDwordValue (L"SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Power", L"HiberbootEnabled", 0);
+									}
+								}
+							}
 							rebootRequired = true;
+						}
 						SetDriverConfigurationFlag (VC_DRIVER_CONFIG_ENABLE_RAM_ENCRYPTION, enableRamEncryption);
 					}
 
@@ -11538,8 +11557,26 @@ static BOOL CALLBACK PerformanceSettingsDlgProc (HWND hwndDlg, UINT msg, WPARAM
 				BOOL enableRamEncryption = IsDlgButtonChecked (hwndDlg, IDC_ENABLE_RAM_ENCRYPTION);
 
 				if (originalRamEncryptionEnabled != enableRamEncryption)
+				{
+					if (enableRamEncryption)
+					{
+						// check if Hibernate or Fast Startup are enabled
+						BOOL bHibernateEnabled, bHiberbootEnabled;
+						if (GetHibernateStatus (bHibernateEnabled, bHiberbootEnabled))
+						{
+							if (bHibernateEnabled || bHiberbootEnabled)
+							{
+								if (AskWarnYesNo ("RAM_ENCRYPTION_DISABLE_HIBERNATE", hwndDlg) == IDNO)
+								{
+									CheckDlgButton (hwndDlg, IDC_ENABLE_RAM_ENCRYPTION, BST_UNCHECKED);
+									return 1;
+								}
+							}
+						}
+					}
 					Warning ("SETTING_REQUIRES_REBOOT", hwndDlg);
 				}
+			}
 			return 1;
 
 		case IDC_BENCHMARK: