Now works on mac, small build change for that

Plus does nothing for linux, but there's a comment.

libraries/networking/CMakeLists.txt

@@ -15,6 +15,10 @@ add_dependency_external_projects(tbb)
 find_package(OpenSSL REQUIRED)
 find_package(TBB REQUIRED)
 
+if (APPLE)
+    find_library(FRAMEWORK_IOKIT IOKit)
+endif ()
+
 if (APPLE AND ${OPENSSL_INCLUDE_DIR} STREQUAL "/usr/include")
   # this is a user on OS X using system OpenSSL, which is going to throw warnings since they're deprecating for their common crypto
   message(WARNING "The found version of OpenSSL is the OS X system version. This will produce deprecation warnings."
@@ -26,6 +30,11 @@ include_directories(SYSTEM "${OPENSSL_INCLUDE_DIR}")
 # append OpenSSL to our list of libraries to link
 target_link_libraries(${TARGET_NAME} ${OPENSSL_LIBRARIES} ${TBB_LIBRARIES})
 
+# IOKit is needed for getting machine fingerprint
+if (APPLE)
+    target_link_libraries(${TARGET_NAME} ${FRAMEWORK_IOKIT})
+endif (APPLE)
+
 # libcrypto uses dlopen in libdl
 if (UNIX)
   target_link_libraries(${TARGET_NAME} ${CMAKE_DL_LIBS})

libraries/networking/src/FingerprintUtils.cpp

@@ -12,8 +12,34 @@
 #include "FingerprintUtils.h"
 #include <QDebug>
 
+#ifdef Q_OS_WIN
+#include <comdef.h>
+#include <Wbemidl.h>
+#endif //Q_OS_WIN
+
+#ifdef Q_OS_MAC
+#include <IOKit/IOBSD.h>
+#include <IOKit/IOKitLib.h>
+#include <IOKit/storage/IOMedia.h>
+#endif //Q_OS_MAC
+
 QString FingerprintUtils::getMachineFingerprint() {
     QString retval;
+
+#ifdef Q_OS_LINUX
+    // sadly need to be root to get smbios guid from linux, so 
+    // for now lets do nothing.
+#endif //Q_OS_LINUX
+
+#ifdef Q_OS_MAC
+    io_registry_entry_t ioRegistryRoot = IORegistryEntryFromPath(kIOMasterPortDefault, "IOService:/");
+    CFStringRef uuidCf = (CFStringRef) IORegistryEntryCreateCFProperty(ioRegistryRoot, CFSTR(kIOPlatformUUIDKey), kCFAllocatorDefault, 0);
+    IOObjectRelease(ioRegistryRoot);
+    retval = QString::fromCFString(uuidCf);
+    CFRelease(uuidCf); 
+    qDebug() << "Mac serial number: " << retval;
+#endif //Q_OS_MAC
+
 #ifdef Q_OS_WIN
     HRESULT hres;
     IWbemLocator *pLoc = NULL;
@@ -125,16 +151,10 @@ QString FingerprintUtils::getMachineFingerprint() {
     qDebug() << "Windows BIOS UUID: " << retval;
 #endif //Q_OS_WIN
 
-#ifdef Q_OS_MAC
-
-    io_registry_entry_t ioRegistryRoot = IORegistryEntryFromPath(kIOMasterPortDefault, "IOService:/");
-    CFStringRef uuidCf = (CFStringRef) IORegistryEntryCreateCFProperty(ioRegistryRoot, CFSTR(kIOPlatformUUIDKey), kCFAllocatorDefault, 0);
-    IOObjectRelease(ioRegistryRoot);
-    retval = QString::fromCFString(uuidCf);
-    CFRelease(uuidCf); 
-    qDebug() << "Mac serial number: " << retval;
-#endif //Q_OS_MAC
-
+    // TODO: should we have a fallback for cases where this failed, 
+    // leaving us with an empty string or something that isn't a 
+    // guid?  For now keeping this a string, but maybe best to return
+    // a QUuid?
     return retval;
 }
 

libraries/networking/src/FingerprintUtils.h

@@ -14,10 +14,6 @@
 
 #include <QString>
 
-#ifdef Q_OS_WIN
-#include <comdef.h>
-#include <Wbemidl.h>
-#endif //Q_OS_WIN
 
 class FingerprintUtils {
 public: