Ensure we can cache the linux/mac banners.

volatility/framework/automagic/linux.py

@@ -22,7 +22,7 @@ class LinuxBannerCache(symbol_cache.SymbolBannerCache):
 class LinuxSymbolFinder(symbol_finder.SymbolFinder):
     """Linux symbol loader based on uname signature strings"""
 
-    banner_config_key = "linux_banner"
+    banner_config_key = "kernel_banner"
     banner_cache = LinuxBannerCache
     symbol_class = "volatility.framework.symbols.linux.LinuxKernelIntermedSymbols"
 

volatility/framework/automagic/mac.py

@@ -21,7 +21,7 @@ class MacBannerCache(symbol_cache.SymbolBannerCache):
 class MacSymbolFinder(symbol_finder.SymbolFinder):
     """Mac symbol loader based on uname signature strings"""
 
-    banner_config_key = 'mac_banner'
+    banner_config_key = 'kernel_banner'
     banner_cache = MacBannerCache
     symbol_class = "volatility.framework.symbols.mac.MacKernelIntermedSymbols"
 
@@ -159,7 +159,7 @@ class MacUtilities(object):
         version_minor_json_address = context.symbol_space.get_symbol(version_minor_symbol).address
         version_minor_phys_offset = MacUtilities.virtual_to_physical_address(version_minor_json_address)
 
-        if compare_banner_offset == 0 or compare_banner == "":
+        if not compare_banner_offset or not compare_banner:
             offset_generator = cls._scan_generator(context, layer_name, progress_callback)
         else:
             offset_generator = [(compare_banner_offset, compare_banner)]

volatility/framework/layers/intel.py

@@ -220,7 +220,7 @@ class Intel(interfaces.layers.TranslationLayerInterface):
                                             optional = False),
                 requirements.IntRequirement(name = 'kernel_virtual_offset',
                                             optional = True),
-                requirements.StringRequirement(name = 'linux_banner',
+                requirements.StringRequirement(name = 'kernel_banner',
                                                optional = True)]