1 files changed, 57 insertions, 0 deletions
diff --git a/Swiften/Base/WindowsRegistry.h b/Swiften/Base/WindowsRegistry.h
new file mode 100644
index 0000000..11a26b3
--- /dev/null
+++ b/Swiften/Base/WindowsRegistry.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2012 Kevin Smith
+ * Licensed under the GNU General Public License v3.
+ * See Documentation/Licenses/GPLv3.txt for more information.
+ */
+
+#pragma once
+
+#include <windows.h>
+
+namespace Swift {
+	class WindowsRegistry {
+		public:
+			static bool isFIPSEnabled() {
+				char* pathForXP = "System\\CurrentControlSet\\Control\\Lsa";
+				char* pathSinceVista = "System\\CurrentControlSet\\Control\\Lsa\\FIPSAlgorithmPolicy";
+				char* keyForXP = "FIPSAlgorithmPolicy";
+				char* keySinceVista = "Enabled";
+
+				OSVERSIONINFO osvi;
+				ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
+				osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
+				GetVersionEx(&osvi);
+
+				char* keyForOS = osvi.dwMajorVersion < 6 ? keyForXP : keySinceVista;
+				char* pathForOS = osvi.dwMajorVersion < 6 ? pathForXP : pathSinceVista;
+
+				/* http://support.microsoft.com/kb/811833 */
+				/* http://msdn.microsoft.com/en-us/library/ms724911%28VS.85%29.aspx */
+				HKEY key;
+				bool result = false;
+				if (RegOpenKeyEx(HKEY_LOCAL_MACHINE,
+							pathForOS,
+							0,
+							KEY_READ,
+							&key) != ERROR_SUCCESS) {
+					/* If we can't find the key that says we're FIPS, we're not FIPS */
+					return result;
+				}
+				DWORD keyType = REG_DWORD;
+				DWORD data;
+				DWORD length = sizeof(data);
+
+				if (RegQueryValueEx(key,
+						keyForOS,
+						NULL,
+						&keyType,
+						(LPBYTE)&data,
+						&length) == ERROR_SUCCESS) {
+					result = data != 0;
+				}
+
+				RegCloseKey(key);
+				return result;
+			}
+	};
+}