Renderers: Allow bytes in JSON output

Fixes #367

volatility/cli/text_renderer.py

@@ -1,7 +1,6 @@
 # This file is Copyright 2019 Volatility Foundation and licensed under the Volatility Software License 1.0
 # which is available at https://www.volatilityfoundation.org/license/vsl-v1.0
 #
-
 import datetime
 import json
 import logging
@@ -69,7 +68,6 @@ def multitypedata_as_text(value: format_hints.MultiTypeData) -> str:
 
 
 def optional(func):
-
     @wraps(func)
     def wrapped(x: Any) -> str:
         if isinstance(x, interfaces.renderers.BaseAbsentValue):
@@ -83,7 +81,6 @@ def optional(func):
 
 
 def quoted_optional(func):
-
     @wraps(func)
     def wrapped(x: Any) -> str:
         result = optional(func)(x)
@@ -266,7 +263,8 @@ class PrettyTextRenderer(CLIRenderer):
         max_column_widths = dict([(column.name, len(column.name)) for column in grid.columns])
 
         def visitor(
-            node: interfaces.renderers.TreeNode, accumulator: List[Tuple[int, Dict[interfaces.renderers.Column, bytes]]]
+                node: interfaces.renderers.TreeNode,
+                accumulator: List[Tuple[int, Dict[interfaces.renderers.Column, bytes]]]
         ) -> List[Tuple[int, Dict[interfaces.renderers.Column, bytes]]]:
             # Nodes always have a path value, giving them a path_depth of at least 1, we use max just in case
             max_column_widths[tree_indent_column] = max(max_column_widths.get(tree_indent_column, 0), node.path_depth)
@@ -306,6 +304,7 @@ class JsonRenderer(CLIRenderer):
     _type_renderers = {
         format_hints.HexBytes: quoted_optional(hex_bytes_as_text),
         interfaces.renderers.Disassembly: quoted_optional(display_disassembly),
+        bytes: optional(lambda x: " ".join(["{0:02x}".format(b) for b in x])),
         datetime.datetime: lambda x: x.isoformat() if not isinstance(x, interfaces.renderers.BaseAbsentValue) else None,
         'default': lambda x: x
     }
@@ -328,7 +327,7 @@ class JsonRenderer(CLIRenderer):
             {}, [])  # type: Tuple[Dict[str, List[interfaces.renderers.TreeNode]], List[interfaces.renderers.TreeNode]]
 
         def visitor(
-            node: interfaces.renderers.TreeNode, accumulator: Tuple[Dict[str, Dict[str, Any]], List[Dict[str, Any]]]
+                node: interfaces.renderers.TreeNode, accumulator: Tuple[Dict[str, Dict[str, Any]], List[Dict[str, Any]]]
         ) -> Tuple[Dict[str, Dict[str, Any]], List[Dict[str, Any]]]:
             # Nodes always have a path value, giving them a path_depth of at least 1, we use max just in case
             acc_map, final_tree = accumulator