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Diffstat (limited to 'python/examples/angr_plugin.py')
| -rw-r--r-- | python/examples/angr_plugin.py | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/python/examples/angr_plugin.py b/python/examples/angr_plugin.py new file mode 100644 index 00000000..26f8040c --- /dev/null +++ b/python/examples/angr_plugin.py @@ -0,0 +1,153 @@ +# Copyright (c) 2015-2017 Vector 35 LLC +# +# Permission is hereby granted, free of charge, to any person obtaining a copy +# of this software and associated documentation files (the "Software"), to +# deal in the Software without restriction, including without limitation the +# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or +# sell copies of the Software, and to permit persons to whom the Software is +# furnished to do so, subject to the following conditions: +# +# The above copyright notice and this permission notice shall be included in +# all copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS +# IN THE SOFTWARE. + + +# This plugin assumes angr is already installed and available on the system. See the angr documentation +# for information about installing angr. It should be installed using the virtualenv method. +# +# This plugin is currently only known to work on Linux using virtualenv. Switch to the virtual environment +# (using a command such as "workon angr"), then run the Binary Ninja UI from the command line. +# +# This method is known to fail on Mac OS X as the virtualenv used by angr does not appear to provide a +# way to automatically link to the correct version of Python, even when running the UI from within the +# virtual environment. A later update may allow for a manual override to link to the required version +# of Python. + +import tempfile +import logging +import os + +__name__ = "__console__" # angr looks for this, it won't load from within a UI without it + +import angr +# For the lazy instead you can just import everything 'from binaryninja import *'' +from binaryninja.binaryview import BinaryView +from binaryninja.plugin import BackgroundTaskThread, PluginCommand +from binaryninja.interaction import show_plain_text_report, show_message_box +from binaryninja.highlight import HighlightColor +from binaryninja.enums import HighlightStandardColor, MessageBoxButtonSet, MessageBoxIcon + +# Disable warning logs as they show up as errors in the UI +logging.disable(logging.WARNING) + +# Create sets in the BinaryView's data field to store the desired path for each view +BinaryView.set_default_session_data("angr_find", set()) +BinaryView.set_default_session_data("angr_avoid", set()) + + +def escaped_output(str): + return '\n'.join([s.encode("string_escape") for s in str.split('\n')]) + + +# Define a background thread object for solving in the background +class Solver(BackgroundTaskThread): + def __init__(self, find, avoid, view): + BackgroundTaskThread.__init__(self, "Solving with angr...", True) + self.find = tuple(find) + self.avoid = tuple(avoid) + self.view = view + + # Write the binary to disk so that the angr API can read it + self.binary = tempfile.NamedTemporaryFile() + self.binary.write(view.file.raw.read(0, len(view.file.raw))) + self.binary.flush() + + def run(self): + # Create an angr project and an explorer with the user's settings + p = angr.Project(self.binary.name) + e = p.surveyors.Explorer(find = self.find, avoid = self.avoid) + + # Solve loop + while not e.done: + if self.cancelled: + # Solve cancelled, show results if there were any + if len(e.found) > 0: + break + return + + # Perform the next step in the solve + e.step() + + # Update status + active_count = len(e.active) + found_count = len(e.found) + + progress = "Solving with angr (%d active path%s" % (active_count, "s" if active_count != 1 else "") + if found_count > 0: + progress += ", %d path%s found" % (found_count, "s" if found_count != 1 else "") + self.progress = progress + ")..." + + # Solve complete, show report + text_report = "Found %d path%s.\n\n" % (len(e.found), "s" if len(e.found) != 1 else "") + i = 1 + for f in e.found: + text_report += "Path %d\n" % i + "=" * 10 + "\n" + text_report += "stdin:\n" + escaped_output(f.state.posix.dumps(0)) + "\n\n" + text_report += "stdout:\n" + escaped_output(f.state.posix.dumps(1)) + "\n\n" + text_report += "stderr:\n" + escaped_output(f.state.posix.dumps(2)) + "\n\n" + i += 1 + + name = self.view.file.filename + if len(name) > 0: + show_plain_text_report("Results from angr - " + os.path.basename(self.view.file.filename), text_report) + else: + show_plain_text_report("Results from angr", text_report) + + +def find_instr(bv, addr): + # Highlight the instruction in green + blocks = bv.get_basic_blocks_at(addr) + for block in blocks: + block.set_auto_highlight(HighlightColor(HighlightStandardColor.GreenHighlightColor, alpha = 128)) + block.function.set_auto_instr_highlight(addr, HighlightStandardColor.GreenHighlightColor) + + # Add the instruction to the list associated with the current view + bv.session_data.angr_find.add(addr) + + +def avoid_instr(bv, addr): + # Highlight the instruction in red + blocks = bv.get_basic_blocks_at(addr) + for block in blocks: + block.set_auto_highlight(HighlightColor(HighlightStandardColor.RedHighlightColor, alpha = 128)) + block.function.set_auto_instr_highlight(addr, HighlightStandardColor.RedHighlightColor) + + # Add the instruction to the list associated with the current view + bv.session_data.angr_avoid.add(addr) + + +def solve(bv): + if len(bv.session_data.angr_find) == 0: + show_message_box("Angr Solve", "You have not specified a goal instruction.\n\n" + + "Please right click on the goal instruction and select \"Find Path to This Instruction\" to " + + "continue.", MessageBoxButtonSet.OKButtonSet, MessageBoxIcon.ErrorIcon) + return + + # Start a solver thread for the path associated with the view + s = Solver(bv.session_data.angr_find, bv.session_data.angr_avoid, bv) + s.start() + + +# Register commands for the user to interact with the plugin +PluginCommand.register_for_address("Find Path to This Instruction", + "When solving, find a path that gets to this instruction", find_instr) +PluginCommand.register_for_address("Avoid This Instruction", + "When solving, avoid paths that reach this instruction", avoid_instr) +PluginCommand.register("Solve With Angr", "Attempt to solve for a path that satisfies the constraints given", solve) |
